KIEWIT PETER SONS INC
S-4, 1997-08-29
HEAVY CONSTRUCTION OTHER THAN BLDG CONST - CONTRACTORS
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<PAGE>
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 29, 1997
 
                                                     REGISTRATION NO. 333-
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                          WASHINGTON, D.C. 20549-1004
                         ------------------------------
 
                                    FORM S-4
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                         ------------------------------
 
                               PKS HOLDINGS, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
                         ------------------------------
 
<TABLE>
<S>                                     <C>                                     <C>
          STATE OF DELAWARE                           91-1842817                               161,162
   (State Or Other Jurisdiction Of       (I.R.S. Employer Identification No.)        (Primary Standard Industrial
    Incorporation Or Organization)                                                   Classification Code Number)
</TABLE>
 
                         ------------------------------
 
                            PETER KIEWIT SONS', INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                                     <C>                                     <C>
          STATE OF DELAWARE                           47-0210602                   1221, 161, 162, 4813, 4911, 7374
   (State Or Other Jurisdiction Of       (I.R.S. Employer Identification No.)        (Primary Standard Industrial
    Incorporation Or Organization)                                                   Classification Code Number)
</TABLE>
 
<TABLE>
<S>                                              <C>
              PKS HOLDINGS, INC.                            PETER KIEWIT SONS', INC.
               1000 KIEWIT PLAZA                                1000 KIEWIT PLAZA
             OMAHA, NEBRASKA 68131                            OMAHA, NEBRASKA 68131
                (402) 342-2052                                   (402) 342-2052
</TABLE>
 
              (Address, Including Zip Code, And Telephone Number,
     Including Area Code, Of Each Registrant's Principal Executive Offices)
                         ------------------------------
 
<TABLE>
<S>                                              <C>
            THOMAS C. STORTZ, ESQ.                          MATTHEW J. JOHNSON, ESQ.
              PKS HOLDINGS, INC.                            PETER KIEWIT SONS', INC.
               1000 KIEWIT PLAZA                                1000 KIEWIT PLAZA
             OMAHA, NEBRASKA 68131                            OMAHA, NEBRASKA 68131
                (402) 342-2052                                   (402) 342-2052
</TABLE>
 
 (Name, Address, Including Zip Code, And Telephone Number, Including Area Code,
                    Of Each Registrant's Agent For Service)
 
                                     COPIES TO:
 
                              JOHN S. D'ALIMONTE, ESQ.
                            WILLKIE FARR & GALLAGHER
                              ONE CITICORP CENTER
                              153 EAST 53RD STREET
                            NEW YORK, NEW YORK 10022
                                 (212) 821-8000
 
    APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE OF THE SECURITIES TO THE
PUBLIC: As soon as practicable after the satisfaction or waiver of the
conditions of the transaction referred to in this Registration Statement.
 
    If the securities being registered on this Form are being offered in
connection with the formation of a holding company and there is compliance with
General Instruction G, check the following box. [   ]
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
<CAPTION>
                                                                PROPOSED MAXIMUM    PROPOSED MAXIMUM      AMOUNT OF
            TITLE OF EACH CLASS OF               AMOUNT TO BE  OFFERING PRICE PER  AGGREGATE OFFERING   REGISTRATION
          SECURITIES TO BE REGISTERED             REGISTERED        SECURITY             PRICE               FEE
<S>                                              <C>           <C>                 <C>                 <C>
PKS Holdings, Inc.
  Common Stock, par value $.01 per share.......   10,519,662       $40.00 (1)       $420,786,480 (1)      $ 127,512
Peter Kiewit Sons', Inc.
  Warrants to purchase Class D Diversified         8,415,730           --                  --                --
  Group Convertible Exchangeable Common Stock,
  par value $.0625 per share...................
Peter Kiewit Sons', Inc.
  Class D Diversified Group Convertible            8,415,730(2)     $54.25 (3)      $456,553,353 (3)      $ 138,350
  Exchangeable Common Stock, par value $.0625
  per share, issuable upon exercise of the
  Warrants.....................................
</TABLE>
 
(1) Estimated pursuant to Rule 457 based on the formula value per share of Class
    C Stock of Peter Kiewit Sons', Inc. (calculated pursuant to its Certificate
    of Incorporation) to be received in exchange for each share of Common Stock
    of PKS Holdings, Inc.
 
(2) Together with such presently indeterminate number of shares of such stock as
    may be issued as a result of anti-dilution adjustments in accordance with
    the terms of the Warrants.
 
(3) Estimated pursuant to Rule 457 based on the formula value per share of Class
    D Stock (calculated pursuant to the Certificate of Incorporation of Peter
    Kiewit Sons', Inc.).
 
- ------------------------------
    THE REGISTRANTS HEREBY AMEND THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANTS
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a),
MAY DETERMINE.
<PAGE>
                                EXPLANATORY NOTE
 
    The matters discussed below are referred to herein as the "Transaction."
 
    Acting pursuant to authority granted to it in the Restated Certificate of
Incorporation (the "PKS Certificate") of Peter Kiewit Sons', Inc. ("PKS"), the
Board of Directors of PKS (the "PKS Board") has determined to require, subject
to the satisfaction of certain conditions, all holders of its Class C
Construction & Mining Group Restricted Redeemable Convertible Exchangeable
Common Stock, par value $.0625 per share ("Class C Stock"), to exchange (the
"Share Exchange") such shares for shares of Common Stock, par value $.01 per
share (the "Exchanged Shares") of PKS Holdings, Inc. ("PKS Holdings"), a newly
formed, direct, wholly owned subsidiary of PKS which will hold all of the assets
and liabilities of the construction business of PKS. This Registration Statement
constitutes a registration statement of PKS Holdings with respect to the
Exchanged Shares.
 
    Prior to the Share Exchange, PKS will declare a dividend of eight-tenths of
one warrant (the "Warrants") to purchase one share of Class D Diversified Group
Convertible Exchangeable Common Stock, par value $.0625 per share ("Class D
Stock"), of PKS with respect to each then-outstanding share of Class C Stock.
The eight-tenths of one Warrant will attach to the Exchanged Share which will be
exchanged for such share of Class C Stock in the Share Exchange. This
Registration Statement also constitutes a registration statement of PKS with
respect to such Warrants and the shares of Class D Stock issuable upon exercise
of the Warrants.
 
    Although stockholder action with respect to the Transaction is not required
under applicable law or the PKS Certificate, the PKS Board has determined to
seek stockholder ratification of the Transaction due to the importance of the
Transaction to PKS and PKS stockholders. In addition, certain post-Transaction
changes to the PKS Certificate are being proposed which require approval of the
holders of Class C Stock, the holders of Class D Stock and all holders of PKS
stock as a group. The Proxy Statement/Joint Prospectus included in this
Registration Statement constitutes a proxy statement of PKS with respect to the
PKS Board's solicitation of such ratification and approval.
<PAGE>
                            PETER KIEWIT SONS', INC.
 
                               1000 KIEWIT PLAZA
 
                             OMAHA, NEBRASKA 68131
 
                                                                          , 1997
 
Dear Kiewit Shareholder:
 
    After careful consideration, the Peter Kiewit Sons', Inc. Board of Directors
has decided to separate the Construction Group and the Diversified Group into
two independent companies. The Board of Directors believes that this separation
will enable the Diversified Group to pursue aggressively its business plan while
allowing the Construction Group to focus on its core construction and mining
businesses.
 
    The enclosed Proxy Statement/Joint Prospectus describes certain transactions
and certain amendments to the PKS Certificate of Incorporation that are intended
to accomplish the separation and to recognize the elimination of the Class C
stockholders' right to convert Class C Stock into Class D Stock. Because these
transactions and the certificate amendments are important to PKS and its
stockholders, we are submitting them to stockholder votes. The Board of
Directors believes that these transactions and the certificate amendments are in
the best interest of PKS and its stockholders, and unanimously recommends that
you vote for the transactions and the certificate amendments. We urge you to
read the Proxy Statement/Joint Prospectus carefully and to return your signed
proxy as soon as possible.
 
                                          Sincerely yours,
 
                                          Walter Scott, Jr.
 
                                          CHAIRMAN OF THE BOARD
 
                                            AND PRESIDENT
<PAGE>
                            PETER KIEWIT SONS', INC.
 
                               1000 KIEWIT PLAZA
 
                             OMAHA, NEBRASKA 68131
 
                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
 
                         TO BE HELD             , 1997
 
    A special meeting (the "Special Meeting") of stockholders ("PKS
Stockholders") of Peter Kiewit Sons', Inc. ("PKS") will be held on             ,
1997, at 10:00 a.m. local time, at the Cloud Room, Kiewit Plaza, Omaha, Nebraska
68131, to consider and vote on two separate proposals that, as described more
fully in the attached Proxy Statement/Joint Prospectus, provide for:
 
    1. Ratification of the decision of the Board of Directors of PKS (the "PKS
Board") to separate the construction business of PKS and the diversified
business of PKS into two independent companies. The PKS Board would effect this
separation by (i) declaring a dividend of eight-tenths of one warrant (a
"Warrant") to purchase one share of Class D Diversified Group Convertible
Exchangeable Common Stock, par value $.0625 per share ("Class D Stock"), of PKS
with respect to each outstanding share of Class C Construction & Mining Group
Restricted Redeemable Convertible Exchangeable Common Stock, par value $.0625
per share ("Class C Stock"), of PKS, and (ii) causing each outstanding share of
Class C Stock to be mandatorily exchanged by resolution of the PKS Board
pursuant to existing provisions of the PKS Restated Certificate of Incorporation
(the "PKS Certificate") for one share of Common Stock, par value $.01 per share,
of PKS Holdings, Inc., a newly formed, direct, wholly owned subsidiary of PKS,
to which the eight-tenths of one Warrant would attach (collectively, the
"Transaction").
 
    2. Approval of amendments to the PKS Certificate (the "Certificate
Amendments"), to be implemented only if the Transaction is consummated, to
change the name of PKS to "Diversified Holdings, Inc.", redesignate Class D
Stock as "Common Stock, par value $.01 per share", modify the repurchase rights
to which the holders of Class D Stock are entitled, delete the provisions
regarding Class C Stock, add certain corporate governance provisions and make
certain other changes described in the attached Proxy Statement/Joint
Prospectus.
 
    Holders of record of PKS stock at the close of business on             ,
1997 are entitled to notice of and to vote at the Special Meeting or any
adjournment or postponement thereof. No business other than the Transaction and
the Certificate Amendments is expected to be considered at the Special Meeting
or at any adjournment or postponement thereof. This Notice, the Proxy
Statement/Joint Prospectus and the accompanying form of proxy are first being
mailed to PKS Stockholders on or about             , 1997.
 
    Although stockholder action with respect to the Transaction is not required
under applicable law or the PKS Certificate, the PKS Board has determined to
seek stockholder ratification of the Transaction due to the importance of the
Transaction to PKS and PKS Stockholders. Ratification of the Transaction
requires the affirmative vote of (i) a majority of the shares of Class C Stock
present and voting at the Special Meeting, voting separately as a class, and
(ii) a majority of the shares of Class D Stock present and voting at the Special
Meeting, voting separately as a class. Approval of the Certificate Amendments
under Delaware law and the PKS Certificate requires the affirmative vote of (x)
at least 80% of the outstanding shares of Class C Stock, voting separately as a
class, (y) a majority of the outstanding shares of Class D Stock, voting
separately as a class, and (z) a majority of the outstanding shares of Class C
Stock and Class D Stock, voting together.
 
    The PKS Board has unanimously approved the Transaction and the Certificate
Amendments and recommends that PKS Stockholders ratify the Transaction and
approve the Certificate Amendments. Each member of the PKS Board has indicated
to PKS that he intends to vote all of his shares of Class C Stock and Class D
Stock to ratify the Transaction and to approve the Certificate Amendments.
 
    Consummation of the Transaction is subject to ratification of the
Transaction by PKS Stockholders and the receipt of certain rulings from the
Internal Revenue Service or a favorable opinion of counsel as to certain U.S.
federal income tax consequences of the Transaction. The PKS Board will retain
discretion,
<PAGE>
even if stockholder ratification of the Transaction is obtained and such rulings
or opinion are received, to abandon, defer or modify the Transaction if the PKS
Board believes that to do so would be in the best interests of all PKS
Stockholders. Unless the PKS Board determines to extend the date, the PKS Board
intends to abandon the Transaction if it is not consummated by October 15, 1998.
The PKS Board also has determined that if the Transaction is not ratified, the
PKS Board will not proceed with the Transaction. The Certificate Amendments will
be effected only if the Transaction is consummated. Stockholder approval of the
Certificate Amendments is not a condition to consummation of the Transaction. In
the event the Certificate Amendments are not approved by PKS Stockholders but
the Transaction is ratified and consummated, the Certificate Amendments will be
reproposed at a subsequent meeting of stockholders of PKS.
 
    TO ENSURE YOUR REPRESENTATION AT THE SPECIAL MEETING, YOU ARE URGED TO
COMPLETE, SIGN AND DATE THE ENCLOSED PROXY CARD AND RETURN IT AS PROMPTLY AS
POSSIBLE IN THE ENCLOSED POSTAGE-PREPAID ENVELOPE.
 
By order of the Board of Directors,
 
Secretary
 
              , 1997
<PAGE>
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROXY STATEMENT/JOINT PROSPECTUS SHALL NOT CONSTITUTE AN OFFER
TO SELL OR THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF
THESE SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE
UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY
SUCH STATE.
<PAGE>
                             SUBJECT TO COMPLETION
 
       PRELIMINARY PROXY STATEMENT/JOINT PROSPECTUS DATED AUGUST 29, 1997
 
<TABLE>
<S>                             <C>
PETER KIEWIT SONS', INC.        PKS HOLDINGS, INC.
1000 KIEWIT PLAZA               1000 KIEWIT PLAZA
OMAHA, NEBRASKA 68131           OMAHA, NEBRASKA 68131
</TABLE>
 
                            ------------------------
 
                 PROXY STATEMENT FOR SPECIAL MEETING/PROSPECTUS
                                       OF
                            PETER KIEWIT SONS', INC.
                            ------------------------
 
                        PROSPECTUS OF PKS HOLDINGS, INC.
                            ------------------------
 
                                  INTRODUCTION
 
    This Proxy Statement/Joint Prospectus is being furnished to stockholders of
Peter Kiewit Sons', Inc., a Delaware corporation ("PKS"), who hold either shares
of its Class C Construction & Mining Group Restricted Redeemable Convertible
Exchangeable Common Stock, par value $.0625 per share ("Class C Stock"), or
shares of its Class D Diversified Group Convertible Exchangeable Common Stock,
par value $.0625 per share ("Class D Stock"), in connection with the
solicitation of proxies by the Board of Directors of PKS (the "PKS Board") for
use at a special meeting of stockholders of PKS (the "Special Meeting") to be
held on             , 1997, at 10:00 a.m. local time, at the Cloud Room, Kiewit
Plaza, Omaha, Nebraska 68131, and at any adjournment or postponement thereof for
the purposes set forth in the accompanying Notice of Special Meeting. At the
Special Meeting, holders of Class C Stock and holders of Class D Stock
(together, "PKS Stockholders") will be asked to ratify a proposed transaction
(the "Transaction") to effect separation of PKS' construction business (the
"Construction Group") and its diversified business (the "Diversified Group" and,
together with the Construction Group, the "Business Groups"). The Transaction
consists of the Share Exchange and the Warrant Distribution (each, as defined
below).
 
    As a result of the Transaction: (i) PKS Holdings, Inc. ("PKS Holdings"), a
newly formed, direct, wholly owned subsidiary of PKS, will become an independent
company conducting the business of the Construction Group, and each share of
Class C Stock outstanding at the time of the consummation of the Transaction
(the "Effective Time") will be mandatorily exchanged (the "Share Exchange") for
one share of Common Stock, par value $.01 per share ("PKS Holdings Stock"), of
PKS Holdings; and (ii) PKS will become an independent company conducting the
business of the Diversified Group, and the shares of Class D Stock outstanding
at the Effective Time will constitute the only outstanding shares of capital
stock of PKS. Immediately following the Transaction, PKS Holdings will be
renamed "Peter Kiewit Sons', Inc." and PKS will be renamed "Diversified
Holdings, Inc." PKS, following the Transaction, is referred to in this Proxy
Statement/Joint Prospectus as "Diversified Holdings."
 
    Prior to the Effective Time, PKS will declare a dividend (the "Warrant
Distribution") of eight-tenths of one warrant to purchase one share of Class D
Stock (the "Warrants") with respect to each then-outstanding share of Class C
Stock. Each Warrant will entitle the registered holder thereof to purchase one
share of Class D Stock (or, after the Certificate Amendments referred to below
have been effected, one share of Diversified Holdings Stock (as defined below))
at a fixed dollar discount, varying from $15.00 to $25.00 per share, to the
appraised value or average trading price per share of Diversified Holdings
Stock. Exercise and transfer of the Warrants will be subject to significant
restrictions and conditions. At the Effective Time, the eight-tenths of one
Warrant will attach to the share of PKS Holdings Stock which will be exchanged
for such share of Class C Stock in the Share Exchange. Certificates representing
the Warrants will not be distributed until after the Share Exchange is
consummated. The Warrants will expire if the Transaction is abandoned. Persons
issued shares of either Class C Stock or PKS Holdings Stock following the record
date for the Warrant Distribution will not be entitled to receive Warrants with
respect to such shares. The Transaction will be consummated on a date to be
determined by the PKS Board after the satisfaction of the conditions of the
Transaction. See "The Transaction."
 
    PKS Stockholders are also being asked to approve the amendments to the
Restated Certificate of Incorporation of PKS (the "PKS Certificate") to change
the name of PKS to "Diversified Holdings, Inc.", redesignate Class D Stock as
"Common Stock, par value $.01 per share", modify the repurchase rights to which
the holders of Class D Stock are entitled, delete the provisions regarding Class
C Stock, add certain corporate governance provisions and make certain other
changes described herein (collectively, the "Certificate Amendments"). If
approved, the Certificate Amendments will be effected immediately following the
consummation of the Transaction. See "The Certificate Amendments." Class D Stock
as so redesignated and modified by the Certificate Amendments is referred to in
this Proxy Statement/Joint Prospectus as "Diversified Holdings Stock."
 
    This Proxy Statement/Joint Prospectus constitutes a prospectus under the
Securities Act of 1933, as amended (the "Securities Act"), (i) of PKS Holdings
with respect to the shares of PKS Holdings Stock to be exchanged for Class C
Stock in the Transaction and (ii) of PKS with respect to (a) the Warrants to be
distributed to holders of Class C Stock pursuant to the Transaction and (b) the
shares of Class D Stock issuable upon exercise of the Warrants.
 
    FOR A DESCRIPTION OF CERTAIN FACTORS THAT SHOULD BE CONSIDERED IN CONNECTION
WITH THE TRANSACTION, SEE "RISK FACTORS REGARDING PKS HOLDINGS AFTER THE
TRANSACTION AND OWNERSHIP OF THE WARRANTS" ON PAGE 20 AND "RISK FACTORS
REGARDING DIVERSIFIED HOLDINGS AFTER THE TRANSACTION" ON PAGE 23.
 
    This Proxy Statement/Joint Prospectus and the accompanying form of proxy are
first being mailed to PKS Stockholders on or about             , 1997. This
Proxy Statement/Joint Prospectus is dated             , 1997.
 
    NEITHER THE TRANSACTION NOR THE SECURITIES TO BE ISSUED PURSUANT TO THIS
PROXY STATEMENT/JOINT PROSPECTUS HAVE BEEN APPROVED OR DISAPPROVED BY THE
SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION. NEITHER
THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS
PASSED UPON THE FAIRNESS OR MERITS OF THE TRANSACTION OR THE CERTIFICATE
AMENDMENTS OR UPON THE ACCURACY OR ADEQUACY OF THE INFORMATION CONTAINED IN THIS
PROXY STATEMENT/JOINT PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
UNLAWFUL.
<PAGE>
                             AVAILABLE INFORMATION
 
    PKS is subject to the informational requirements of the Securities Exchange
Act of 1934 (the "Exchange Act"), and in accordance therewith files reports,
proxy statements and other information with the Securities and Exchange
Commission (the "Commission"). Such reports, proxy statements and other
information filed by PKS with the Commission can be inspected, and copies may be
obtained, at the Public Reference Section of the Commission, 450 Fifth Street,
N.W., Washington, D.C. 20549, at prescribed rates, as well as at the following
Regional Offices of the Commission: Seven World Trade Center, New York, New York
10048; and Citicorp Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661-2511. The Commission also maintains a web site that contains
reports, proxy statements and other information regarding registrants that file
electronically with the Commission. The address of such site is http://
www.sec.gov.
 
    PKS and PKS Holdings have jointly filed a Registration Statement on Form S-4
(as amended and including exhibits, the "Registration Statement") with the
Commission under the Securities Act (i) of PKS Holdings with respect to the
shares of PKS Holdings Stock to be exchanged for Class C Stock in the
Transaction, and (ii) of PKS with respect to (x) the Warrants to be distributed
to holders of Class C Stock pursuant to the Transaction and (y) the shares of
Class D Stock issuable upon exercise of the Warrants. Such information can be
inspected at and obtained from the Commission in the manner set forth above. For
further information pertaining to PKS, PKS Holdings, the Construction Group, the
Diversified Group, Class C Stock, Class D Stock, PKS Holdings Stock and the
Warrants, reference is made to the Registration Statement. Statements contained
herein concerning any document filed as an exhibit to the Registration Statement
are not necessarily complete and, in each instance, reference is made to the
copy of such document filed as an exhibit to the Registration Statement. Each
such statement is qualified in its entirety by such reference.
 
    PKS' publicly available information, including information filed with the
Commission, includes separate financial statements, financial data and business
descriptions for each of the Construction Group and the Diversified Group. The
business of PKS Holdings after the Transaction will consist entirely of the
business of the Construction Group. Accordingly, information herein with respect
to the business of PKS Holdings is information regarding the Construction Group.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
    The following documents, which have been filed by PKS with the Commission,
are incorporated herein by reference:
 
    1. Annual Report of PKS on Form 10-K for the fiscal year ended December 28,
1996;
 
    2. Quarterly Report of PKS on Form 10-Q for the quarter ended March 31,
1997; and
 
    3. Quarterly Report of PKS on Form 10-Q for the quarter ended June 30, 1997.
 
    All documents filed by PKS with the Commission pursuant to Sections 13(a),
13(c), 14 or 15(d) of the Exchange Act after the date of this Proxy
Statement/Joint Prospectus and prior to the consummation of the Transaction
shall be deemed to be incorporated by reference in this Proxy Statement/Joint
Prospectus and to be a part hereof from the date of filing of such documents.
Any statement contained herein or in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Proxy Statement/Joint Prospectus to the extent that a
statement contained herein or in any other subsequently filed document which
also is or is deemed to be incorporated by reference herein modifies or
supersedes such statement. Any such statement so modified or superseded shall
not be deemed, except as so modified or superseded, to constitute a part of this
Proxy Statement/Joint Prospectus.
 
                                       ii
<PAGE>
    THIS PROXY STATEMENT/JOINT PROSPECTUS INCORPORATES DOCUMENTS BY REFERENCE
WHICH ARE NOT PRESENTED HEREIN OR DELIVERED HEREWITH. THESE DOCUMENTS, OTHER
THAN THE EXHIBITS THERETO, ARE AVAILABLE WITHOUT CHARGE FROM PKS TO EACH PERSON,
INCLUDING ANY BENEFICIAL OWNER TO WHOM THIS PROXY STATEMENT/JOINT PROSPECTUS IS
DELIVERED, UPON THE WRITTEN OR ORAL REQUEST OF SUCH PERSON TO PETER KIEWIT
SONS', INC., 1000 KIEWIT PLAZA, OMAHA, NEBRASKA 68131, ATTENTION: STOCK
REGISTRAR (TELEPHONE NUMBER (402) 271-2977). IN ORDER TO ENSURE TIMELY DELIVERY
OF SUCH DOCUMENTS, ANY REQUEST SHOULD BE MADE WITHIN 15 BUSINESS DAYS OF THE
DATE OF MAILING OF THIS PROXY STATEMENT/JOINT PROSPECTUS.
 
                                      iii
<PAGE>
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                                               PAGE
                                                                                                            -----------
<S>                                                                                                         <C>
INTRODUCTION..............................................................................................           i
AVAILABLE INFORMATION.....................................................................................          ii
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE...........................................................          ii
SUMMARY...................................................................................................           1
    Introduction..........................................................................................           1
    The Special Meeting...................................................................................           1
    PKS Holdings..........................................................................................           2
    Diversified Holdings..................................................................................           2
    The Transaction.......................................................................................           4
    The Certificate Amendments............................................................................           6
    Risk Factors Regarding PKS Holdings After the Transaction.............................................           6
    Risk Factors Regarding Diversified Holdings After the Transaction.....................................           7
    Summary Comparison of Class C Stock and PKS Holdings Stock............................................           8
    Summary Comparison of Class D Stock and Diversified Holdings Stock....................................          12
    Installment Note Program..............................................................................          16
    Summary Historical and Pro Forma Financial Data of Peter Kiewit Sons', Inc............................          17
    Summary Historical and Pro Forma Financial Data of the Construction Group.............................          19
RISK FACTORS REGARDING PKS HOLDINGS AFTER THE TRANSACTION AND OWNERSHIP OF THE WARRANTS...................          20
    Loss of Conversion Right..............................................................................          20
    Future Sales of PKS Holdings Stock by PKS Holdings....................................................          20
    Limitation of Value of Warrants.......................................................................          20
    Limitations on Exercise and Transfer of the Warrants..................................................          21
    Transfers from the Construction Group.................................................................          21
    Effect of Separation of the Business Groups...........................................................          21
    No Assurance of Achievement of Business Objective.....................................................          22
    Current Registration Statement and State Registration Required to Exercise Warrants...................          22
    Forward-Looking Information May Prove Inaccurate......................................................          22
RISK FACTORS REGARDING DIVERSIFIED HOLDINGS AFTER THE TRANSACTION.........................................          23
    No Assurance of Achievement of Business Objectives....................................................          23
    No Assurance of Transaction Completion................................................................          23
    Potential Consequences of a Failure to Consummate the Transaction.....................................          23
    Expansion Plan Risks..................................................................................          24
    Limited Public Market for Diversified Holdings Stock; No Assurance as to Listing......................          25
    Modification of Repurchase Obligation.................................................................          25
    Dividend Policy.......................................................................................          25
    Effect of Separation of the Business Groups...........................................................          26
    Certain Limitations on Changes in Control of Diversified Holdings.....................................          26
    Dilution Resulting From Exercise of Warrants..........................................................          26
    Forward-Looking Information May Prove Inaccurate......................................................          26
THE SPECIAL MEETING.......................................................................................          27
    Date, Time and Place of the Special Meeting...........................................................          27
    Purpose of the Special Meeting........................................................................          27
    Recommendation of the PKS Board.......................................................................          27
    Special Meeting Record Date...........................................................................          27
    Appraisal Rights......................................................................................          27
    Voting................................................................................................          27
    Proxies...............................................................................................          28
    Solicitation Costs....................................................................................          28
</TABLE>
 
                                       iv
<PAGE>
<TABLE>
<CAPTION>
                                                                                                               PAGE
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<S>                                                                                                         <C>
THE TRANSACTION...........................................................................................          29
    General...............................................................................................          29
    Background and Purposes of the Transaction............................................................          29
    Opinion of Financial Advisor..........................................................................          32
    Recommendation of the PKS Board.......................................................................          34
    Effects of the Transaction............................................................................          34
    The Warrant Distribution..............................................................................          35
    Exchange of Class C Stock; Delivery of Certificates for PKS Holdings Stock and Warrants...............          36
    Conditions of the Transaction.........................................................................          36
    Conversion of Class C Stock Prior to the Transaction..................................................          37
    Installment Note Program..............................................................................          38
    Arrangements for Canadian Class C Holders.............................................................          38
    Conversion of the Debentures..........................................................................          39
    Trading of PKS Holdings Common Stock..................................................................          39
    Trading of Diversified Holdings Stock.................................................................          39
    Required Vote for the Transaction.....................................................................          39
    Certain U.S. Federal Income Tax Considerations........................................................          40
    Certain Canadian Federal Income Tax Considerations....................................................          42
    Nebraska Tax Ruling...................................................................................          44
    Regulatory Approvals..................................................................................          44
    Appraisal Rights......................................................................................          44
    Accounting Treatment..................................................................................          44
    Post-Transaction Arrangements Between PKS Holdings and Diversified Holdings...........................          44
    Existing Arrangements and Relationships...............................................................          45
THE CERTIFICATE AMENDMENTS................................................................................          47
    General...............................................................................................          47
    Capital Structure of Diversified Holdings.............................................................          47
    Board of Directors....................................................................................          48
    Stockholder Consent...................................................................................          49
    Stockholders' Meetings................................................................................          49
    Amendment of By-laws..................................................................................          50
    Repurchase Rights.....................................................................................          50
    Reasons for the Corporate Governance Provisions.......................................................          51
    Section 203 of the Delaware General Corporation Law...................................................          54
    Diversified Holdings Rights Plan......................................................................          54
SELECTED HISTORICAL AND PRO FORMA FINANCIAL DATA OF PETER KIEWIT SONS', INC. AND THE CONSTRUCTION GROUP...          56
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF THE CONSTRUCTION
  GROUP...................................................................................................          60
PKS HOLDINGS DIRECTORS AND EXECUTIVE OFFICERS.............................................................          63
DIVERSIFIED HOLDINGS DIRECTORS AND EXECUTIVE OFFICERS.....................................................          65
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS............................................................          67
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION...............................................          68
COMPARISON OF CLASS C STOCK AND PKS HOLDINGS STOCK........................................................          69
    General...............................................................................................          69
    Dividend Policy.......................................................................................          69
    Voting Rights.........................................................................................          70
    Repurchase Rights.....................................................................................          71
    Liquidation Rights....................................................................................          71
    Conversion Rights.....................................................................................          71
    Formula Value.........................................................................................          72
</TABLE>
 
                                       v
<PAGE>
<TABLE>
<CAPTION>
                                                                                                               PAGE
                                                                                                            -----------
<S>                                                                                                         <C>
    Mandatory Exchange....................................................................................          72
    Ownership And Transferability Restrictions............................................................          72
    Listing...............................................................................................          73
    Preferred Stock.......................................................................................          73
    Limitation on Directors' Liability....................................................................          74
COMPARISON OF CLASS D STOCK AND DIVERSIFIED HOLDINGS STOCK................................................          75
    General...............................................................................................          75
    Dividend Policy.......................................................................................          75
    Voting Rights.........................................................................................          76
    Repurchase Rights.....................................................................................          76
    Liquidation Rights....................................................................................          77
    Conversion Rights.....................................................................................          77
    Formula Value.........................................................................................          77
    Mandatory Exchange....................................................................................          78
    Ownership and Transferability Restrictions............................................................          78
    Listing...............................................................................................          78
    Preferred Stock.......................................................................................          78
    Limitation on Directors' Liability....................................................................          79
CERTAIN PER SHARE INFORMATION.............................................................................          80
    Class C Dividends and Per Share Values................................................................          80
    Class D Dividends and Per Share Values................................................................          80
DESCRIPTION OF THE WARRANTS...............................................................................          81
    General...............................................................................................          81
    Expiration of the Warrants............................................................................          81
    Exercise Periods......................................................................................          81
    Exercise Conditions...................................................................................          81
    Exercise Price........................................................................................          82
    Restrictions on Transfer..............................................................................          83
    Form and Denominations................................................................................          83
    Office for Presentation...............................................................................          83
    Payment of Exercise Price.............................................................................          83
    Certain Adjustments...................................................................................          84
    Modification of Warrant Agreement.....................................................................          84
    Holder of Warrants Not Deemed a Stockholder...........................................................          84
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT OF PKS, PKS HOLDINGS AND DIVERSIFIED
  HOLDINGS................................................................................................          85
    PKS (Before the Transaction)..........................................................................          85
    PKS Holdings..........................................................................................          86
    Diversified Holdings..................................................................................          87
LEGAL MATTERS.............................................................................................          88
EXPERTS...................................................................................................          88
 
Index to Financial Statements.............................................................................         F-1
Index to Pro Forma Financial Statements...................................................................        F-26
</TABLE>
 
APPENDIX A -- BUSINESS OF PKS HOLDINGS
 
APPENDIX B -- BUSINESS OF DIVERSIFIED HOLDINGS
 
APPENDIX C -- FAIRNESS OPINION OF GLEACHER NATWEST
 
APPENDIX D -- FORM OF RESTATED CERTIFICATE OF INCORPORATION OF PKS HOLDINGS
 
APPENDIX E -- FORM OF SECOND RESTATED CERTIFICATE OF INCORPORATION OF
              DIVERSIFIED HOLDINGS
 
                                       vi
<PAGE>
                                    SUMMARY
 
    The following summary is qualified in its entirety by the more detailed
information contained elsewhere or incorporated by reference in this Proxy
Statement/Joint Prospectus and the Appendices hereto. PKS Stockholders are urged
to read this Proxy Statement/Joint Prospectus and the Appendices hereto in their
entirety.
 
INTRODUCTION
 
    This Proxy Statement/Joint Prospectus is being furnished to PKS Stockholders
in connection with the solicitation of proxies by the PKS Board for use at the
Special Meeting. At the Special Meeting, PKS Stockholders will be asked to
ratify the Transaction and approve the Certificate Amendments. The Transaction
will be consummated on a date to be determined by the PKS Board after the
satisfaction of the conditions of the Transaction. See "The Transaction." The
Certificate Amendments will be effected only if the Transaction is consummated.
See "The Certificate Amendments."
 
THE SPECIAL MEETING
 
    DATE, TIME AND PLACE OF THE SPECIAL MEETING.  The Special Meeting will be
held on             , 1997, at 10:00 a.m. local time, at the Cloud Room, Kiewit
Plaza, Omaha, Nebraska 68131.
 
    PURPOSE OF THE SPECIAL MEETING.  The Special Meeting is being held to
consider and vote upon (i) ratification of the Transaction and (ii) approval of
the Certificate Amendments.
 
    RECOMMENDATION OF THE PKS BOARD.  The PKS Board has unanimously approved the
Transaction and the Certificate Amendments and recommends that PKS Stockholders
ratify the Transaction and approve the Certificate Amendments. For a description
of the reasons for the Transaction, see "The Transaction-- Background and
Purposes of the Transaction." For a description of the reasons for the
Certificate Amendments, see "The Certificate Amendments." Each member of the PKS
Board has indicated to PKS that he intends to vote all of his shares of Class C
Stock and Class D Stock to ratify the Transaction and to approve the Certificate
Amendments.
 
    SPECIAL MEETING RECORD DATE.  PKS Stockholders as of the close of business
on             , 1997 (the "Special Meeting Record Date") are entitled to notice
of and to vote at the Special Meeting.
 
    APPRAISAL RIGHTS.  PKS Stockholders will not be entitled to appraisal rights
as a result of the Transaction.
 
    VOTING.  Although stockholder action with respect to the Transaction is not
required under applicable law or the PKS Certificate, the PKS Board has
determined to seek stockholder ratification of the Transaction due to the
importance of the Transaction to PKS and PKS Stockholders. Ratification of the
Transaction requires the affirmative vote of (i) a majority of the shares of
Class C Stock present and voting at the Special Meeting, voting separately as a
class, and (ii) a majority of the shares of Class D Stock present and voting at
the Special Meeting, voting separately as a class. Approval of the Certificate
Amendments under Delaware law and the PKS Certificate requires the affirmative
vote of (x) at least 80% of the outstanding shares of Class C Stock, voting
separately as a class, (y) a majority of the outstanding shares of Class D
Stock, voting separately as a class, and (z) a majority of the outstanding
shares of Class C Stock and Class D Stock, voting together.
 
    Each share of Class C Stock and Class D Stock (together, the "PKS Stock")
outstanding at the close of business on the Special Meeting Record Date is
entitled to one vote at the Special Meeting. As of the Special Meeting Record
Date, there were       shares of Class C Stock and       shares of Class D Stock
outstanding and entitled to vote at the Special Meeting. The representation in
person or by proxy of at least a majority of the outstanding shares entitled to
vote is necessary to provide a quorum at the Special Meeting.
 
    SOLICITATION COSTS.  PKS will bear the costs of this solicitation.
<PAGE>
PKS HOLDINGS
 
    The Construction Group's business is conducted by operating subsidiaries of
Kiewit Construction Group Inc. ("KCG"), which is a direct, wholly owned
subsidiary of PKS. Prior to the Share Exchange, PKS will contribute all of the
capital stock of KCG to PKS Holdings, and KCG will become a wholly owned
subsidiary of PKS Holdings. Immediately following the Transaction, PKS Holdings
will be renamed "Peter Kiewit Sons', Inc."
 
    The Construction Group and its joint ventures perform a full range of
engineering, procurement, construction, maintenance, management and related
services for a broad range of public and private customers primarily in the
United States and Canada. Contract awards of the Construction Group during 1996
were distributed among the following construction markets: transportation
(including highways, bridges, airports, railroads and mass transit)--45%, dams
and reservoirs--17%, commercial buildings-- 16%, sewage and waste disposal--12%,
power, heat, cooling--4%, water supply--2%, and mining--2%.
 
    The Construction Group primarily performs its services as a general
contractor. As a general contractor, the Construction Group is responsible for
the overall direction and management of construction projects and for completion
of each contract in accordance with terms, plans and specifications. The
Construction Group plans and schedules the projects, procures materials, hires
workers as needed and awards subcontracts. The Construction Group generally
requires performance and payment bonds or other assurances of operational
capability and financial capacity from its subcontractors. Several subsidiaries
within the Construction Group, primarily in Arizona and Oregon, produce
construction materials, including ready-mix concrete, asphalt, sand and gravel.
The Construction Group also has quarrying operations in New Mexico and Wyoming,
which produce landscaping materials and railroad ballast. Kiewit Mining Group,
Inc., a subsidiary within the Construction Group, provides mine management
services to Kiewit Coal Properties Inc., a subsidiary within the Diversified
Group, and owns a 47% interest in a coal mine located in Shelby County, Alabama.
 
    PKS Holdings was incorporated in 1997 as a Delaware corporation. Its
principal offices are located at 1000 Kiewit Plaza, Omaha, Nebraska 68131, and
its telephone number is (402) 342-2052.
 
    For further information concerning the business of PKS Holdings, see
Appendix A hereto.
 
DIVERSIFIED HOLDINGS
 
    CURRENT BUSINESS.  The Diversified Group engages in the information
services, telecommunications, coal mining and energy businesses, through
ownership of operating subsidiaries, joint venture investments and ownership of
substantial positions in public companies. The Diversified Group also holds
smaller positions in a number of development stage or startup ventures.
 
    The Diversified Group engages in the information services business through
its wholly owned subsidiary, PKS Information Services, Inc. ("PKSIS"), which
provides computer outsourcing and systems integration services to customers in
the United States and abroad. The Diversified Group currently engages in the
telecommunications business through ownership of a 48.5% common stock interest
in C-TEC Corporation ("C-TEC"), a public company with interests in the local
telephone, video programming, long distance telephone, communication engineering
and competitive telephone businesses. C-TEC expects to split into three separate
public companies by October 1, 1997. In September 1995, PKS distributed to
holders of Class D Stock all of the Diversified Group's interest in MFS
Communications Company, Inc. ("MFS"). MFS provided a wide range of
telecommunications services to business and government customers. In December
1996, WorldCom, Inc. acquired MFS in a stock-for-stock merger.
 
    The Diversified Group engages in the coal mining business through ownership
of a 50% interest in three coal mines managed by the Construction Group. The
Diversified Group engages in the energy business through ownership of: (i)
approximately 30% of the outstanding stock of CalEnergy Company, Inc.
("CalEnergy"), a public company engaged in the generation, transmission and
distribution of electric
 
                                       2
<PAGE>
power in the United States and abroad; (ii) joint venture interests in several
power plants developed, built and operated by CalEnergy in the Philippines and
Indonesia; and (iii) ownership of a 30% equity interest in Northern Electric
plc, one of the twelve regional electricity companies created by the
privatization of the electricity industry in the United Kingdom in 1990.
 
    In connection with the Expansion Plan (described below), the Diversified
Group expects to devote substantially more management time and capital resources
to its information services business. The management of the Diversified Group
intends to conduct a comprehensive review of the existing Diversified Group
businesses to determine how those businesses will complement the Diversified
Group focus on information services businesses as a result of the Expansion
Plan. For example, the Construction Group and the Diversified Group are
currently discussing a number of possible changes to their existing relationship
with respect to the coal mining properties operated by the Construction Group.
These possible changes include a restructuring of the current mine management
arrangement between the two Business Groups, the formation of a partnership
between the two Business Groups to hold all of their interests with respect to
the mining properties, the transfer by the Diversified Group to the Construction
Group of its interests in the mining joint ventures or another transaction.
 
    EXPANSION PLAN.  The Diversified Group recently has determined to increase
substantially the emphasis it places on and the resources devoted to its
information services business, with a view to becoming a facilities-based
provider of a broad range of integrated information services to business (the
"Expansion Plan"). Pursuant to the Expansion Plan, the Diversified Group intends
to expand substantially its current information services business, through both
the expansion of the business of PKSIS and the creation, through a combination
of construction, purchase and leasing of facilities and other assets, of a
substantial facilities-based Internet communications network.
 
    Through PKSIS, the Diversified Group currently provides the following
information services:
 
    - Consulting and implementation services to businesses wishing to convert
      existing software systems which operate on older computer systems to newer
      client server-based systems, with an emphasis on Internet connected
      networks;
 
    - Computer outsourcing services, including networking and computing services
      necessary both for older mainframe-based systems and newer client
      server-based systems; and
 
    - Reengineering services which allow companies to convert older legacy
      software systems to modern networked computing systems, with a focus on
      reengineering software to enable older software application and data
      repositories to be accessed by Hypertext Markup Language (HTML)-based
      browsers ("Web browsers") over the Internet or over private or limited
      access Transmission Control Protocol/Internet Protocol ("TCP/IP")
      networks.
 
    In order to grow and expand substantially the information services provided
by the Diversified Group, the Diversified Group is developing a comprehensive
plan to construct, purchase and lease local and backbone facilities necessary to
provide a wide range of Internet-based communications services. These services
include:
 
    - After construction, purchase and lease of local and backbone facilities, a
      range of Internet access services at varying capacity levels and, as
      technology development allows, at specified levels of quality of service
      and security; and
 
    - A number of business-oriented communications services using a combination
      of network facilities the Diversified Group would construct, purchase and
      lease from third parties, which may include fax services which are
      transmitted in part over TCP/IP networks and are offered at a lower price
      than public telephone network-based fax service and voice message storing
      and forwarding over the same TCP/IP-based networks.
 
                                       3
<PAGE>
    The Diversified Group believes that, over time, a substantial number of
businesses will convert existing computer application systems (which run on
standalone or networked computing platforms utilizing a wide variety of
operating systems, applications and data repositories) to computer systems which
communicate using TCP/IP and are accessed by users employing Web browsers. The
Diversified Group further believes that businesses will prefer to contract for
assistance in making this conversion with those vendors able to provide a full
range of services from initial consulting to Internet access with requisite
quality and security levels.
 
    Pursuant to the Expansion Plan, the Diversified Group's strategy will be to
attempt to meet this customer need by: (i) growing and expanding its existing
capabilities in computer network systems, consulting, outsourcing, and software
reengineering, with particular emphasis on conversion of legacy software systems
to systems which are compatible with TCP/IP networks and Web browsers access;
and (ii) creating a national end-to-end TCP/IP-based network through a
combination of construction, purchase and leasing of assets. The Diversified
Group intends to optimize this national network to provide Internet-based
services to businesses at low cost and high quality, and to design the network,
to the extent possible, to more easily include future technological upgrades
than older, less flexible networks owned by competitors.
 
    To direct its new emphasis on these businesses, the Diversified Group
recruited James Q. Crowe and R. Douglas Bradbury, formerly chief executive
officer and chief financial officer, respectively, of MFS, as chief executive
officer and chief financial officer, respectively, of Kiewit Diversified Group
Inc. ("KDG"), effective August 1, 1997. The decision to separate the Diversified
Group and the Construction Group was an important factor in recruiting Mr. Crowe
and Mr. Bradbury. See "The Transaction--Background and Purposes of the
Transaction" and "Certain Relationships and Related Transactions."
 
    PKS, which is to be renamed "Diversified Holdings, Inc." if the Transaction
is consummated, was incorporated in 1941 as a Delaware corporation. Its
principal offices are located at 1000 Kiewit Plaza, Omaha, Nebraska 68131, and
its telephone number is (402) 342-2052.
 
    For further information concerning the current business of the Diversified
Group, see Appendix B hereto.
 
THE TRANSACTION
 
    PURPOSES OF THE TRANSACTION.  The Transaction is intended to separate the
Business Groups into two independent companies. The PKS Board believes that
separation of the Business Groups will (i) permit the Diversified Group to
attract and retain the senior management and employees needed to implement and
develop the Diversified Group's Expansion Plan, including Mr. Crowe and Mr.
Bradbury, (ii) enable the Diversified Group to access the capital markets in
order to fund the Expansion Plan on more advantageous terms than would be
available to the Diversified Group as part of PKS, (iii) enable the Diversified
Group to pursue strategic investments and acquisitions, as part of the Expansion
Plan, which could be foreclosed to the Diversified Group as part of PKS and (iv)
allow the management of each Business Group to focus its attention and financial
resources on that Business Group's business. Accordingly, the PKS Board believes
that the separation of the Business Groups is in the best interests of PKS and
the Business Groups and, therefore, all PKS Stockholders.
 
    The Warrant Distribution recognizes the potential value of the right of
holders of Class C Stock to convert Class C Stock into Class D Stock pursuant to
the PKS Certificate (the "Conversion Right"), which will be eliminated by a
separation of the Business Groups. See "The Transaction--Background and Purposes
of the Transaction."
 
    DESCRIPTION OF THE TRANSACTION.  The Transaction consists of the Share
Exchange and the Warrant Distribution. PKS Stockholders are being asked to
ratify the decision of the PKS Board to effect the Transaction.
 
                                       4
<PAGE>
    THE SHARE EXCHANGE.  The Share Exchange will be consummated at the Effective
Time, which will be a date to be determined by the PKS Board after the
satisfaction of the conditions of the Transaction. At the Effective Time, by
resolution of the PKS Board pursuant to existing provisions of the PKS
Certificate, the PKS Board will cause each outstanding share of Class C Stock to
be mandatorily exchanged, pursuant to the Share Exchange, for one share of PKS
Holdings Stock.
 
    As a result of the Share Exchange: (i) PKS Holdings, a newly formed, direct,
wholly owned subsidiary of PKS, will become an independent company conducting
the business of the Construction Group, and each outstanding share of Class C
Stock at the Effective Time will be mandatorily exchanged for one share of PKS
Holdings Stock; and (ii) PKS will become an independent company conducting the
business of the Diversified Group, and the outstanding shares of Class D Stock
at the Effective Time will constitute the only outstanding shares of capital
stock of PKS. Immediately following the Share Exchange, PKS Holdings will be
renamed "Peter Kiewit Sons', Inc." and PKS will be renamed "Diversified
Holdings, Inc."
 
    THE WARRANT DISTRIBUTION.  Prior to the Effective Time, PKS will effect the
Warrant Distribution by declaring a dividend of eight-tenths of one Warrant with
respect to each then-outstanding share of Class C Stock. Each Warrant will
entitle the registered holder thereof to purchase one share of Class D Stock
(or, after the Certificate Amendments have been effected, one share of
Diversified Holdings Stock) at a fixed dollar discount, varying from $15.00 to
$25.00 per share, to the appraised value or average trading price per share of
Diversified Holdings Stock. Exercise and transfer of the Warrants are subject to
significant restrictions and conditions. At the Effective Time, the eight-tenths
of one Warrant will attach to the share of PKS Holdings Stock which will be
exchanged for such share of Class C Stock in the Share Exchange. Certificates
representing the Warrants will not be distributed until after the Share Exchange
is consummated. The Warrants will expire if the Transaction is abandoned.
Persons issued shares of either Class C Stock or PKS Holdings Stock following
the record date for the Warrant Distribution will not be entitled to receive
Warrants with respect to such shares. See "The Transaction--The Warrant
Distribution" and "Description of the Warrants."
 
    CONVERSIONS OF CLASS C STOCK INTO CLASS D STOCK PRIOR TO THE
TRANSACTION.  Holders of PKS Holdings Stock (I.E., the former holders of Class C
Stock) will have no rights comparable to the Conversion Right, which permits
holders of Class C Stock to convert shares of Class C Stock into Class D Stock.
Consequently, should the Transaction be consummated, the conversion election
period beginning on October 15, 1997 and ending on December 15, 1997 for
conversions effective as of January 1, 1998 (the "1997 Conversion Period") would
be the final opportunity to convert shares of Class C Stock into Class D Stock.
Holders of Class C Stock who convert their shares during the 1997 Conversion
Period will not receive Warrants with respect to such converted shares pursuant
to the Warrant Distribution. See "Risk Factors Regarding PKS Holdings After the
Transaction and Ownership of the Warrants--Loss of Conversion Right" and "The
Transaction--The Warrant Distribution."
 
    Pursuant to the PKS Certificate, the PKS Board has set a limit of 3,000,000
shares on the number of shares of Class C Stock that can be converted during the
1997 Conversion Period (the "Conversion Cap"). If shares of Class C Stock in
excess of the Conversion Cap are tendered to PKS for conversion during the 1997
Conversion Period, PKS will elect to repurchase the excess shares of Class C
Stock for either cash or a short-term promissory note of PKS, at the election of
the tendering holder. Tendering holders of such excess stock who are eligible at
that time to own Class C Stock may elect to withdraw such excess shares rather
than having them purchased by PKS. See "The Transaction--Conversion of Class C
Stock Prior to the Transaction."
 
    CERTAIN U.S. FEDERAL INCOME TAX CONSIDERATIONS.  PKS will request rulings
(the "IRS Rulings") from the Internal Revenue Service (the "IRS") to the effect
that (i) the Share Exchange will be treated as a tax-free exchange under Section
355 of the Internal Revenue Code of 1986, as amended (the "Code"), and (ii) the
Warrant Distribution will be treated as a tax-free distribution pursuant to
Section 305(a) of the Code. Accordingly, for U.S. federal income tax purposes,
no gain or loss will be recognized by the U.S.
 
                                       5
<PAGE>
holders of Class C Stock or, in general, PKS on the Warrant Distribution or on
the Share Exchange. Consummation of the Transaction is conditioned upon receipt
of the IRS Rulings. However, at any time before the IRS Rulings have been
issued, PKS may elect to effect the Transaction in reliance on an opinion of
counsel (the "Tax Opinion") generally to the effect that the tax consequences
described above should result. The receipt of either the IRS Rulings or the Tax
Opinion is referred to as the "Tax Condition." See "The Transaction--Certain
U.S. Federal Income Tax Considerations."
 
    CERTAIN CANADIAN FEDERAL INCOME TAX CONSIDERATIONS.  A holder of Class C
Stock who, for purposes of the Income Tax Act (Canada) (the "Canadian Act"), is
a resident of Canada will (i) be required to include in computing the holder's
income an amount equal to the fair market value of any Warrants received in the
Warrant Distribution and (ii) generally realize a capital gain on the exchange
of shares in the Share Exchange. See "The Transaction--Certain Canadian Federal
Income Tax Considerations."
 
    CONVERSION OF THE DEBENTURES.  If PKS Stockholders ratify the Transaction,
PKS will permit holders of its Series 1993 through 1996 Class C Convertible
Debentures (collectively, the "Debentures") to convert such Debentures into
Class C Stock subsequent to the expiration of the Conversion Period and prior to
the record date for the Warrant Distribution. Accordingly, holders of Debentures
who convert their Debentures into shares of Class C Stock will receive Warrants
with respect to such shares in the Warrant Distribution and have such shares
exchanged in the Share Exchange. See "The Transaction--Conversion of the
Debentures" and "Certain Relationships and Related Transactions."
 
    CONDITIONS OF THE TRANSACTION.  Consummation of the Transaction is subject
to ratification of the Transaction by PKS Stockholders and satisfaction of the
Tax Condition. The PKS Board will retain discretion, even if stockholder
ratification of the Transaction is obtained and the Tax Condition is satisfied,
to abandon, defer or modify the Transaction if the PKS Board believes that to do
so would be in the best interests of all PKS Stockholders. Unless the PKS Board
determines to extend the date, the PKS Board intends to abandon the Transaction
if it is not consummated by October 15, 1998. The PKS Board also has determined
that if the Transaction is not ratified, the PKS Board will not proceed with the
Transaction. The Certificate Amendments will be effected only if the Transaction
is consummated. Stockholder approval of the Certificate Amendments is not a
condition to consummation of the Transaction. In the event the Certificate
Amendments are not approved by PKS Stockholders but the Transaction is ratified
and consummated, the Certificate Amendments will be reproposed at a subsequent
meeting of stockholders of Diversified Holdings.
 
THE CERTIFICATE AMENDMENTS
 
    PKS Stockholders are also being asked to approve the Certificate Amendments
which would amend the PKS Certificate by changing the name of PKS to
"Diversified Holdings, Inc.", redesignating Class D Stock as "Common Stock, par
value $.01 per share", modifying the repurchase rights to which the holders of
Class D Stock are entitled, deleting the provisions regarding Class C Stock,
adding certain corporate governance provisions and making certain other changes
described under "The Certificate Amendments." If approved, the Certificate
Amendments will be effected immediately following the consummation of the
Transaction. See "The Certificate Amendments."
 
RISK FACTORS REGARDING PKS HOLDINGS AFTER THE TRANSACTION AND OWNERSHIP OF THE
  WARRANTS
 
    Persons who will hold PKS Holdings Stock or Warrants if the Transaction is
consummated should consider carefully risk factors regarding PKS Holdings and
ownership of the Warrants, including (i) the loss of the right of holders of
Class C Stock to convert shares of Class C Stock into Class D Stock, (ii)
limitations on future sales of PKS Holdings Stock by PKS Holdings, (iii)
limitations on the potential value of the Warrants, (iv) limitations on the
exercise and transfer of the Warrants, (v) the potential effect of certain
transfers of funds from the Construction Group to the Diversified Group upon
conversion of Class C Stock into Class D Stock during the 1997 Conversion
Period, (vi) possible adverse effects on the
 
                                       6
<PAGE>
business of the Construction Group resulting from separation of the Business
Groups, (vii) risks related to the Installment Note Program (as defined below),
(viii) the possibility that business objectives of the Transaction may not be
achieved, (ix) the need for a current registration statement to permit exercise
of the Warrants and (x) the risk that forward-looking information included
herein may prove inaccurate. See "Risk Factors Regarding PKS Holdings After the
Transaction and Ownership of the Warrants" and "Risk Factors Regarding
Diversified Holdings After the Transaction."
 
RISK FACTORS REGARDING DIVERSIFIED HOLDINGS AFTER THE TRANSACTION
 
    If the Transaction is consummated, holders of Class D Stock will continue to
hold the shares of Class D Stock which they held immediately prior to the
Effective Time and holders of Class C Stock will receive Warrants. Upon the
filing of the Certificate Amendments, Class D Stock will be redesignated and
modified as Diversified Holdings Stock and the Warrants will entitle the holders
thereof to purchase Diversified Holdings Stock. Holders of Class D Stock and
Class C Stock should consider carefully risk factors regarding Diversified
Holdings after the Transaction, including (i) the possibility that the business
objectives of the Transaction will not be achieved, (ii) the possibility that
the Transaction may not be completed and the potential consequences of such a
failure to complete the Transaction, (iii) certain risks relating to the
Expansion Plan, (iv) the anticipated policy of the Board of Directors of
Diversified Holdings (the "Diversified Holdings Board") that dividends will not
be paid on Diversified Holdings Stock in the foreseeable future, (v) the limited
market for Diversified Holdings Stock and uncertainties as to its being listed
for trading in the future, (vi) possible effects of modifications of the stock
repurchase obligations of Diversified Holdings, (vii) possible adverse effects
on the business of Diversified Holdings resulting from the separation of the
Business Groups, (viii) certain limitations on changes in control of Diversified
Holdings, (ix) dilution to holders of Diversified Holdings Stock resulting from
exercise of the Warrants and (x) the risk that forward-looking information
included herein may prove inaccurate. See "Risk Factors Regarding Diversified
Holdings After the Transaction" and "Risk Factors Regarding PKS Holdings After
the Transaction and Ownership of the Warrants."
 
                                       7
<PAGE>
SUMMARY COMPARISON OF CLASS C STOCK AND PKS HOLDINGS STOCK
 
    The following is a summary comparison of the terms of Class C Stock and PKS
Holdings Stock for which Class C Stock will be exchanged in the Transaction. The
rights of and restrictions on PKS Holdings Stock under the Restated Certificate
of Incorporation of PKS Holdings, to be in effect after the Transaction is
consummated (the "PKS Holdings Certificate"), will be substantially similar to
those of Class C Stock under the PKS Certificate, except that there will be no
rights or restrictions relating to the Class D Stock. Appendix D sets forth the
proposed form of the PKS Holdings Certificate. For more detailed information
regarding the terms of Class C Stock and PKS Holding Stock, see "Comparison of
Class C Stock and PKS Holdings Stock."
 
<TABLE>
<CAPTION>
                                               CLASS C STOCK                         PKS HOLDINGS STOCK
                                   --------------------------------------  --------------------------------------
<S>                                <C>                                     <C>
GENERAL..........................  Holders of Class C Stock are            Holders of PKS Holdings Stock will be
                                   stockholders of PKS, not of the         stockholders of PKS Holdings, which
                                   Construction Group, and have an         will not be a subsidiary of PKS and
                                   interest in the equity and assets of    which will own only assets of the
                                   PKS, including the assets of the        Construction Group. PKS Holdings is a
                                   Construction Group, plus one-half of    Delaware corporation.
                                   the unconsolidated stockholders'
                                   equity (whether positive or negative)
                                   of PKS itself. PKS is a Delaware
                                   corporation.
DIVIDEND POLICY..................  Under Delaware law and the PKS          Under Delaware law and the PKS
                                   Certificate, after dividends have been  Holdings Certificate, after dividends
                                   declared and set aside for payment or   have been declared and set aside for
                                   paid on PKS preferred stock (if any)    payment or paid on PKS Holdings
                                   having a preference over Class C        preferred stock (if any) having a
                                   Stock, dividends on Class C Stock may   preference over PKS Holdings Stock,
                                   be declared and paid out of the         dividends on PKS Holdings Stock may be
                                   excess, if any, of the amount legally   declared and paid out of PKS Holdings
                                   available therefor over the amount      funds legally available therefor. PKS
                                   (the "Available Class D Dividend        Holdings intends to continue the
                                   Amount") equal to the lesser of (i)     current policy of paying in each year
                                   the amount legally available for        15% to 20% of the prior year's
                                   payment of dividends on common stock    earnings of the Construction Group as
                                   of PKS and (ii) an amount equal to (x)  a cash dividend.
                                   a certain value (the "Class D Formula
                                   Value") derived from a formula in the
                                   PKS Certificate, less (y) dividends on
                                   Class D Stock declared during the
                                   current year. The current policy is to
                                   pay in each year 15% to 20% of the
                                   prior year's earnings of the
                                   Construction Group as a cash dividend.
VOTING RIGHTS....................  Holders of Class C Stock are entitled   Holders of PKS Holdings Stock will be
                                   to one vote per share on all matters    entitled to one vote per share on all
                                   submitted to a vote of the common       matters submitted to a vote of the
                                   stockholders of PKS. Holders of Class   common stockholders of PKS Holdings.
                                   C Stock are entitled, as a separate     Holders of PKS Holdings Stock will be
                                   class, to elect two-thirds of the PKS   entitled to elect the entire Board of
                                   Board by cumulative voting. In          Directors of PKS Holdings (the "PKS
                                   addition, the affirmative vote of both  Holdings Board") by cumulative
</TABLE>
 
                                       8
<PAGE>
 
<TABLE>
<CAPTION>
                                               CLASS C STOCK                         PKS HOLDINGS STOCK
                                   --------------------------------------  --------------------------------------
                                   holders of (i) 80% of the outstanding   voting. In addition, the supermajority
                                   Class C Stock and (ii) the majority of  voting requirements included in the
                                   the outstanding voting power of PKS,    PKS Certificate with respect to Class
                                   is required to approve certain          C Stock will be included in the PKS
                                   fundamental corporate changes, such as  Holdings Certificate with respect to
                                   changes in the capital structure of     PKS Holdings Stock.
                                   PKS.
<S>                                <C>                                     <C>
REPURCHASE RIGHTS................  During the first 15 days of any         During the first 15 days of any
                                   calendar month, PKS must repurchase     calendar month, PKS Holdings will be
                                   shares of Class C Stock upon the        required to repurchase shares of PKS
                                   demand of a holder of such stock at a   Holdings Stock upon demand of a holder
                                   price (the "Class C Per Share Price")   of such stock at the PKS Holdings Per
                                   determined using the Class C Formula    Share Price (as defined in "--Formula
                                   Value (as defined in "--Formula Value"  Value" below) determined using the PKS
                                   below). The PKS Board may, under        Holdings Formula Value (as defined in
                                   certain circumstances, suspend its      "--Formula Value" below). The PKS
                                   repurchase obligation for up to one     Holdings Board may, under certain
                                   year.                                   circumstances, suspend its repurchase
                                                                           obligation for up to one year.
LIQUIDATION RIGHTS...............  Upon the liquidation, dissolution or    Upon the liquidation, dissolution or
                                   winding up of PKS, after the creditors  winding up of PKS Holdings, after the
                                   of PKS and the holders of PKS           creditors of PKS Holdings and the
                                   preferred stock (if any) receive the    holders of PKS Holdings preferred
                                   full preferential amounts to which      stock (if any) receive the full
                                   they are entitled, holders of Class C   preferential amounts to which they are
                                   Stock will be entitled to receive       entitled, holders of PKS Holdings
                                   assets of PKS based on an account (the  Stock will be entitled to receive any
                                   "C Liquidation Account"), the balance   assets available for distribution to
                                   of which is equal to the value of the   PKS Holdings stockholders.
                                   assets of PKS in excess of an amount
                                   (the "D Liquidation Account") equal to
                                   the value of the assets of the
                                   Diversified Group, plus an amount
                                   equal to one-half of the
                                   unconsolidated stockholders' equity of
                                   PKS itself. Holders of Class C Stock
                                   will receive an amount equal to $1.00
                                   per share out of the C Liquidation
                                   Account. After a payment of $2.00 per
                                   share to the holders of Class D Stock
                                   out of the D Liquidation Account (and
                                   the C Liquidation Account, if the D
                                   Liquidation Account is insufficient to
                                   make such payment), any assets
                                   remaining thereafter in the C
                                   Liquidation Account will be
                                   distributed to the holders of Class C
                                   Stock.
</TABLE>
 
                                       9
<PAGE>
 
<TABLE>
<CAPTION>
                                               CLASS C STOCK                         PKS HOLDINGS STOCK
                                   --------------------------------------  --------------------------------------
<S>                                <C>                                     <C>
CONVERSION RIGHTS................  As of January 1 of each year, a holder  Holders of PKS Holdings Stock will not
                                   of Class C Stock may convert shares of  have the right to convert their PKS
                                   Class C Stock into Class D Stock        Holdings Stock into any security of
                                   pursuant to the Conversion Right by     PKS Holdings or Diversified Holdings.
                                   providing written notice to PKS during  PKS Holdings intends to implement a
                                   the period from and including October   program to allow holders of PKS
                                   15 through and including December 15    Holdings Stock to elect to receive
                                   of the immediately preceding year.      installment promissory notes as an
                                   Shares of Class C Stock are             alternative to cash upon repurchase of
                                   convertible into a number of shares of  PKS Holdings Stock in accordance with
                                   Class D Stock that bears the same       the terms of the PKS Holdings
                                   ratio to the number of shares           Certificate. See "The
                                   surrendered for conversion as the       Transaction--Installment Note
                                   Class C Per Share Price at the          Program."
                                   conversion date bears to either (i) if
                                   Class D Stock is not publicly traded,
                                   the Class D Per Share Price (as
                                   defined below) or (ii) if Class D
                                   Stock is publicly traded, the average
                                   closing price of Class D Stock for
                                   twenty trading days prior to such
                                   date. No conversions of Class C Stock
                                   into Class D Stock will become
                                   effective if PKS' duty to repurchase
                                   Class C or Class D Stock is at the
                                   time suspended, as provided in the PKS
                                   Certificate.
FORMULA VALUE....................  The Class C Per Share Price at which    The "PKS Holdings Per Share Price" at
                                   Class C Stock is bought and sold is     which PKS Holdings Stock will be
                                   based on the Class C Formula Value.     bought and sold is based on a certain
                                   The Class C Formula Value is equal to   formula value (the "PKS Holdings
                                   the stockholders' equity of PKS less    Formula Value"). The PKS Holdings
                                   (i) the book value of certain           Formula Value is equal to the
                                   property, plant and equipment, (ii)     stockholders' equity of PKS Holdings
                                   the stockholders' equity attributable   less (i) the book value of certain
                                   to outstanding PKS preferred stock (if  property, plant and equipment, and
                                   any), and (iii) the Class D Formula     (ii) the stockholders' equity
                                   Value.                                  attributable to outstanding PKS
                                                                           Holdings preferred stock (if any).
MANDATORY
  EXCHANGE.......................  If all the assets and liabilities of    Holders of PKS Holdings Stock will not
                                   the Construction Group are held by a    be subject to mandatory exchange
                                   wholly owned subsidiary of PKS (such    provisions comparable to those to
                                   as PKS Holdings), the PKS Board may,    which Class C stockholders are
                                   by a two-thirds vote, require the       subject.
                                   exchange of all the outstanding Class
                                   C Stock for the common stock of such
                                   subsidiary on a pro rata basis. It is
                                   pursuant to this provision that the
                                   Share Exchange will be effected by the
                                   PKS Board.
</TABLE>
 
                                       10
<PAGE>
 
<TABLE>
<CAPTION>
                                               CLASS C STOCK                         PKS HOLDINGS STOCK
                                   --------------------------------------  --------------------------------------
<S>                                <C>                                     <C>
OWNERSHIP AND TRANSFERABILITY
  RESTRICTIONS...................  Class C Stock may be owned (with        PKS Holdings Stock will be owned (with
                                   certain limited exceptions) only by     certain limited exceptions comparable
                                   employees of PKS and its subsidiaries.  to those applicable to Class C Stock)
                                   Shares of Class C Stock must be resold  only by employees of PKS Holdings and
                                   to PKS upon death or termination of     its subsidiaries. Shares of PKS
                                   employment of an employee, except that  Holdings Stock must be resold to PKS
                                   Class C Stock may, in certain           Holdings upon death or termination of
                                   circumstances, be converted into Class  employment of an employee. Pursuant to
                                   D Stock. Pursuant to the PKS            the PKS Holdings Certificate and
                                   Certificate and repurchase agreements   repurchase agreements between PKS
                                   between PKS and holders of Class C      Holdings and holders of PKS Holdings
                                   Stock, the holders may only buy Class   Stock, the holders will only be
                                   C Stock from PKS and, except for        entitled to buy PKS Holdings Stock
                                   transfers for the benefit of certain    from PKS Holdings and, except for
                                   family members of the holders and       transfers for the benefit of certain
                                   charitable organizations, may only      family members of the holders and
                                   sell Class C Stock to PKS.              charitable organizations, may only
                                                                           sell PKS Holdings Stock to PKS
                                                                           Holdings.
LISTING..........................  The Class C Stock is not listed for     PKS Holdings Stock will not be listed
                                   trading on any stock exchange or        for trading on any stock exchange or
                                   market.                                 market at the Effective Time or
                                                                           thereafter.
</TABLE>
 
                                       11
<PAGE>
SUMMARY COMPARISON OF CLASS D STOCK AND DIVERSIFIED HOLDINGS STOCK
 
    The Certificate Amendments will change the name of PKS to "Diversified
Holdings, Inc.", redesignate Class D Stock as "Common Stock, par value $.01 per
share", modify the repurchase rights to which the holders of Class D Stock are
entitled, delete the provisions regarding Class C Stock, add certain corporate
governance provisions and make certain other changes described herein. See "The
Certificate Amendments." Appendix E sets forth a form of the restatement of the
PKS Certificate after giving effect to the Certificate Amendments (the PKS
Certificate as so amended and restated is referred to herein as the "Diversified
Holdings Certificate"). The following is a summary comparison of the terms of
Class D Stock before such redesignation and Diversified Holdings Stock after
such redesignation and other modifications. For more detailed information
regarding the terms of Class D Stock and Diversified Holdings Stock, see
"Comparison of Class D Stock and Diversified Holdings Stock."
 
<TABLE>
<CAPTION>
                                                                                    DIVERSIFIED HOLDINGS
                                             CLASS D STOCK                                 STOCK
                                ----------------------------------------  ----------------------------------------
<S>                             <C>                                       <C>
 
GENERAL.......................  Holders of Class D Stock are              Holders of Diversified Holdings Stock
                                stockholders of PKS, not of the           will be stockholders of Diversified
                                Diversified Group, and have an interest   Holdings, which will own the assets of
                                in the equity and assets of PKS           the Diversified Group. Diversified
                                including the assets of Diversified       Holdings is a Delaware corporation.
                                Group plus one-half of the
                                unconsolidated stockholders' equity
                                (whether positive or negative) of PKS.
                                PKS is a Delaware corporation.
 
DIVIDEND POLICY...............  Under Delaware law and the PKS            Under Delaware law and the Diversified
                                Certificate, after dividends have been    Holdings Certificate, after dividends
                                declared and set aside for payment or     have been declared and set aside for
                                paid on PKS preferred stock (if any)      payment or paid on Diversified Holdings
                                having a preference over Class D Stock,   preferred stock (if any) having a
                                dividends on Class D Stock may be         preference over Diversified Holdings
                                declared and paid out of the Available    Stock, dividends on Diversified Holdings
                                Class D Dividend Amount. Dividends of     Stock may be declared and paid out of
                                $.50 per share were paid on Class D       Diversified Holdings funds legally
                                Stock in each of 1996 and 1997. Prior to  available therefor. It is currently
                                the time the Transaction is consummated   anticipated that dividends will not be
                                or abandoned, PKS does not intend to      paid on Diversified Holdings Stock in
                                declare or pay any additional dividends   the foreseeable future.
                                on Class D Stock.
 
VOTING RIGHTS.................  In general, holders of Class D Stock are  Holders of Diversified Holdings Stock
                                entitled to one vote per share on all     will be entitled to one vote per share
                                matters submitted to a vote of the        on all matters submitted to a vote of
                                common stockholders of PKS. Holders of    the common stockholders of Diversified
                                Class D Stock are entitled, as a          Holdings, and will elect the entire
                                separate class, to elect one-third of     Diversified Holdings Board. The
                                the PKS Board. Holders of Class D Stock   Diversified Holdings Board will be
                                have no right to cumulative voting. In    classified. Holders of Diversified
                                addition, the affirmative vote of         Holdings Stock will have no right to
                                holders of 80% of the outstanding Class   cumulative voting. Amendment of the
                                D Stock is                                By-laws of
</TABLE>
 
                                       12
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                    DIVERSIFIED HOLDINGS
                                             CLASS D STOCK                                 STOCK
                                ----------------------------------------  ----------------------------------------
                                required to change the formula for        Diversified Holdings by the Diversified
                                determining the Class D Per Share Price   Holdings stockholders will require the
                                or the Class D Formula Value.             affirmative vote of the holders of
                                                                          two-thirds of the outstanding
                                                                          Diversified Holdings Stock. The
                                                                          affirmative vote of holders of 80% of
                                                                          Diversified Holdings Stock will be
                                                                          required to amend the formula for
                                                                          determining the Diversified Holdings Per
                                                                          Share Price or Diversified Holdings
                                                                          Formula Value (each as defined below).
                                                                          Provisions of the Diversified Holdings
                                                                          Certificate which provide for
                                                                          supermajority voting rights will require
                                                                          the same supermajority to be amended.
                                                                          Holders of Diversified Holdings Stock
                                                                          will not be entitled to act by written
                                                                          consent.
<S>                             <C>                                       <C>
 
REPURCHASE
RIGHTS........................  Unless and until Class D Stock is         Unless and until the Diversified
                                publicly traded, PKS must repurchase      Holdings Stock is publicly traded,
                                shares of Class D Stock upon the demand   Diversified Holdings will be required to
                                of a holder of such stock, during the     repurchase shares of Diversified
                                first 15 days of any calendar month, at   Holdings Stock upon the demand of a
                                a price (the "Class D Per Share Price")   holder of such stock, during the first
                                determined using the Class D Formula      15 days of any calendar month, at a
                                Value. The PKS Board may, under certain   price (the "Diversified Holdings Per
                                circumstances, suspend its repurchase     Share Price") determined using the
                                obligation for up to one year. In         formula value described below (the
                                addition, if more than 10% of the shares  "Diversified Holdings Formula Value").
                                of Class D Stock are tendered for         The Diversified Holdings Board may,
                                repurchase in any fiscal year, the PKS    under certain circumstances, suspend its
                                Board may elect to repurchase Class D     repurchase obligation for up to one
                                Stock by delivering two-year promissory   year. In addition, if more than 10% of
                                notes instead of cash.                    the shares of Diversified Holdings Stock
                                                                          are tendered for repurchase in any
                                                                          fiscal year, the Diversified Holdings
                                                                          Board may elect to repurchase
                                                                          Diversified Holdings Stock by delivering
                                                                          interest-bearing promissory notes
                                                                          instead of cash. Such promissory notes
                                                                          will have such term to maturity, up to
                                                                          ten years, as the Diversified Holdings
                                                                          Board may determine.
</TABLE>
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                    DIVERSIFIED HOLDINGS
                                             CLASS D STOCK                                 STOCK
                                ----------------------------------------  ----------------------------------------
<S>                             <C>                                       <C>
LIQUIDATION
RIGHTS........................  Upon the liquidation, dissolution or      Upon the liquidation, dissolution or
                                winding up of PKS, after the creditors    winding up of Diversified Holdings,
                                of PKS and the holders of PKS preferred   after the creditors of Diversified
                                stock (if any) receive the full           Holdings and the holders of Diversified
                                preferential amounts to which they are    Holdings preferred stock (if any)
                                entitled, holders of Class D Stock will   receive the full preferential amounts to
                                be entitled to an amount equal to the D   which they are entitled, holders of
                                Liquidation Account. Holders of Class D   Diversified Holdings Stock will be
                                Stock will receive an amount equal to     entitled to receive any assets available
                                $2.00 per share out of the D Liquidation  for distribution to holders of
                                Account (and the C Liquidation Account,   Diversified Holdings Stock.
                                after the payment of $1.00 to holders of
                                Class C Stock, if the D Liquidation
                                Account does not contain sufficient
                                funds to make such payment). Any assets
                                remaining thereafter in the D
                                Liquidation Account will be distributed
                                to the holders of Class D Stock.
 
CONVERSION
RIGHTS........................  A holder of Class D Stock who is offered  Holders of Diversified Holdings Stock
                                Class C Stock in connection with PKS'     will not have the right to convert their
                                annual offering of stock to employees     Diversified Holdings Stock into any
                                may, in lieu of purchasing such shares    security of PKS Holdings or Diversified
                                of Class C Stock, convert shares of       Holdings.
                                Class D Stock into the number of shares
                                of Class C Stock (up to the number of
                                shares of Class C Stock offered) that
                                bears the same ratio to the number of
                                shares surrendered for conversion as the
                                Class D Per Share Price on the date PKS
                                receives notice of the conversion bears
                                to the Class C Per Share Price. No
                                conversions of Class D Stock into Class
                                C Stock are allowed after Class D Stock
                                has become publicly traded or if PKS'
                                duty to repurchase Class D Stock is at
                                the time suspended, as provided in the
                                PKS Certificate.
 
FORMULA VALUE.................  The Class D Formula Value is the basis    Unless and until the Diversified
                                for the determination of the amount paid  Holdings Stock is publicly traded, the
                                as dividends on Class D Stock and,        Diversified Holdings Formula Value will
                                unless and until Class D Stock is         be the basis for the determination of
                                publicly traded, the Class D              the Diversified
</TABLE>
 
                                       14
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                    DIVERSIFIED HOLDINGS
                                             CLASS D STOCK                                 STOCK
                                ----------------------------------------  ----------------------------------------
                                Per Share Price at which Class D Stock    Holdings Per Share Price at which
                                must be repurchased by PKS upon the       Diversified Holdings Stock must be
                                demand of a holder of Class D Stock.      repurchased by Diversified Holdings upon
                                                                          demand of a holder of Diversified
                                                                          Holdings Stock. The formula for
                                                                          determining the Diversified Holdings
                                                                          Formula Value will be substantially
                                                                          similar to the formula for determining
                                                                          the Class D Formula Value. The
                                                                          Diversified Holdings Formula Value will
                                                                          not be used to determine the amounts
                                                                          available for dividends on Diversified
                                                                          Holdings Stock. See "--Dividend Policy"
                                                                          above.
<S>                             <C>                                       <C>
 
MANDATORY EXCHANGE............  The PKS Certificate provides that unless  Holders of Diversified Holdings Stock
                                and until Class D Stock becomes publicly  will not be subject to mandatory
                                traded, the PKS Board may, by a           exchange provisions comparable to those
                                two-thirds vote, require an exchange of   to which holders of Class D Stock are
                                the outstanding shares of Class D Stock   subject.
                                for shares of Class C Stock. If a holder
                                of Class D Stock is not then eligible to
                                own Class C Stock, PKS must purchase
                                such holder's shares of Class D Stock
                                for cash at the Class D Per Share Price.
 
OWNERSHIP AND TRANSFERABILITY
RESTRICTIONS..................  Under the PKS Certificate, there are no   Under the Diversified Holdings
                                restrictions on the transfer or           Certificate, there will be no
                                ownership of Class D Stock.               restrictions on the transfer or
                                                                          ownership of Diversified Holdings Stock.
 
LISTING.......................  Class D Stock is not listed for trading   Diversified Holdings does not expect to
                                on any stock exchange or market.          list Diversified Holdings Stock for
                                                                          trading on a stock exchange or market at
                                                                          the Effective Time. Diversified Holdings
                                                                          expects that it will not seek such a
                                                                          listing until it raises capital through
                                                                          a public equity offering or desires to
                                                                          have a listed equity security available
                                                                          for acquisitions. Any determination to
                                                                          raise public equity capital will depend
                                                                          on a number of factors including,
                                                                          without limitation,
</TABLE>
 
                                       15
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                    DIVERSIFIED HOLDINGS
                                             CLASS D STOCK                                 STOCK
                                ----------------------------------------  ----------------------------------------
<S>                            <C>                                       <C>
                                                                          Diversified Holdings' capital needs, the
                                                                          availability and attractiveness of
                                                                          alternative sources of capital, the
                                                                          performance of Diversified Holdings and
                                                                          conditions in the public equity markets.
                                                                          Accordingly, no assurance can be given
                                                                          that Diversified Holdings Stock will be
                                                                          listed for trading in the future, or, if
                                                                          it is, when such listing will be
                                                                          accomplished or whether an active
                                                                          trading market will develop or be
                                                                          sustained.
</TABLE>
 
INSTALLMENT NOTE PROGRAM
 
    If the Transaction is consummated, PKS Holdings intends to implement a
program (the "Installment Note Program") to allow holders of PKS Holdings Stock
to elect to receive installment promissory notes of PKS Holdings ("Installment
Notes") as an alternative to cash upon repurchase of PKS Holdings Stock in
accordance with the terms of the PKS Holdings Certificate. See "The
Transaction--Installment Note Program."
 
                                       16
<PAGE>
               SUMMARY HISTORICAL AND PRO FORMA FINANCIAL DATA OF
 
                            PETER KIEWIT SONS', INC.
 
  (To be renamed Diversified Holdings, Inc. following the consummation of the
                                  Transaction)
<TABLE>
<CAPTION>
                                                                    HISTORICAL                    PRO FORMA (1)(2)(3)
                                                    ------------------------------------------  ------------------------
<S>                                                 <C>        <C>        <C>        <C>        <C>          <C>
                                                                            SIX MONTHS ENDED
                                                        FISCAL YEAR                                FISCAL YEAR ENDED
                                                           ENDED                JUNE 30,           DECEMBER 28, 1996
                                                    --------------------  --------------------  ------------------------
 
<CAPTION>
                                                                                                 SCENARIO     SCENARIO
                                                      1995       1996       1996       1997          1            2
                                                    ---------  ---------  ---------  ---------  -----------  -----------
                                                              (DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
<S>                                                 <C>        <C>        <C>        <C>        <C>          <C>
RESULTS OF OPERATIONS:
  Revenue.........................................  $   2,867  $   2,904  $   1,363  $   1,381   $     285    $     285
  Net earnings....................................        244        221         71         91         114          116
FINANCIAL POSITION:
  Total assets....................................  $   3,451  $   3,548             $   3,805
  Current portion of long-term debt...............         42         57                    14
  Long-term debt, less current portion............        370        332                   393
  Stockholders' equity(4).........................      1,607      1,819                 1,926
PER COMMON SHARE:
  Net Earnings:
    Class C Stock:
      Primary.....................................  $    7.78  $   10.13  $    3.46  $    5.34
      Fully diluted...............................       7.62       9.82       3.36       5.13
 
    Class D Stock:
      Primary.....................................       6.45       4.85       1.54       1.67   $    4.07    $    4.04
      Fully diluted...............................       6.44       4.85       1.54       1.67        4.06         4.03
 
  Dividends(5):
    Class C Stock.................................       1.05       1.30       0.60       0.70
    Class D Stock.................................       0.50       0.50     --         --
 
  Stock Price (6):
    Class C Stock.................................      32.40      40.70      31.80      40.00
    Class D Stock.................................      49.50      54.25      49.50      54.25
 
  Book Value:
    Class C Stock.................................      42.90      51.02      45.34      55.38
    Class D Stock.................................      49.49      54.23      54.22      55.62
 
<CAPTION>
 
<S>                                                 <C>          <C>
 
                                                        SIX MONTHS ENDED
                                                         JUNE 30, 1997
                                                    ------------------------
                                                     SCENARIO     SCENARIO
                                                         1            2
                                                    -----------  -----------
 
<S>                                                 <C>          <C>
RESULTS OF OPERATIONS:
  Revenue.........................................   $     161    $     161
  Net earnings....................................          42           43
FINANCIAL POSITION:
  Total assets....................................   $   2,115    $   2,175
  Current portion of long-term debt...............           1            1
  Long-term debt, less current portion............         133          133
  Stockholders' equity(4).........................       1,480        1,540
PER COMMON SHARE:
  Net Earnings:
    Class C Stock:
      Primary.....................................
      Fully diluted...............................
    Class D Stock:
      Primary.....................................   $    1.43    $    1.43
      Fully diluted...............................        1.43         1.43
  Dividends(5):
    Class C Stock.................................
    Class D Stock.................................
  Stock Price (6):
    Class C Stock.................................
    Class D Stock.................................       54.90        54.90
  Book Value:
    Class C Stock.................................
    Class D Stock.................................       54.92        54.89
</TABLE>
 
- ------------------------
 
(1) The pro forma results of operations data are computed assuming that the
    Transaction was consummated on December 31, 1995 and December 29, 1996 for
    the fiscal year ended December 28, 1996 and six months ended June 30, 1997,
    respectively. The pro forma financial position data as of June 30, 1997
    assume that the Transaction was consummated as of such date. The pro forma
    financial data of PKS should be read in conjunction with PKS' historical
    consolidated financial statements and the notes thereto and the "Pro Forma
    Financial Information" included elsewhere herein or incorporated by
    reference.
 
(2) The pro forma information assumes, in two separate scenarios, that 1,500,000
    shares (Scenario 1) and that 3,000,000 shares (Scenario 2) of Class C Stock
    will be converted in the 1997 Conversion Period.
 
(3) The PKS Board approved the Transaction at a special meeting on August 14,
    1997. The pro forma results of operations, financial position and per common
    share data assume the earnings statement and balance sheet accounts of the
    Construction Group have been removed as a result of the Transaction. In
    addition, the operating results and financial position of C-TEC have been
    reflected as an equity method investment in the pro forma data due to
    C-TEC's pending reorganization which will reduce PKS' voting interest below
    fifty percent.
 
(4) The aggregate redemption value of Class C Stock and Class D Stock at June
    30, 1997 was $404 million and $1,333 million, respectively.
 
                                       17
<PAGE>
               SUMMARY HISTORICAL AND PRO FORMA FINANCIAL DATA OF
 
                            PETER KIEWIT SONS', INC.
 
  (To be renamed Diversified Holdings, Inc. following the consummation of the
                                  Transaction)
 
(5) The 1995 and 1996 Class C Stock dividends include $.60 and $.70 per share
    dividends declared in 1995 and 1996, but paid in January of the subsequent
    year. The 1995 and 1996 Class D Stock dividends include $.50 per share
    dividends declared in 1995 and 1996, but paid in January of the subsequent
    year. Pro forma dividends have not been presented as the amount of any
    dividends that may have been declared if the Transaction had occurred as of
    the beginning of the respective periods cannot be determined.
 
(6) Pursuant to the PKS Certificate, the stock price calculation of a share of
    Class C Stock and Class D Stock is computed annually at the end of the
    fiscal year, except that adjustments to the stock price to reflect dividends
    are made at the time such dividends are declared.
 
    See "Selected Historical and Pro Forma Financial Data of Peter Kiewit Sons',
Inc." for further information.
 
                                       18
<PAGE>
                SUMMARY HISTORICAL AND PRO FORMA FINANCIAL DATA
                           OF THE CONSTRUCTION GROUP
 
(To be operated by PKS Holdings, Inc. which will be renamed "Peter Kiewit Sons',
                                     Inc."
                 following the consummation of the Transaction)
<TABLE>
<CAPTION>
                                                                    HISTORICAL                      PRO FORMA (1)(2)
                                                    ------------------------------------------  ------------------------
<S>                                                 <C>        <C>        <C>        <C>        <C>          <C>
                                                                            SIX MONTHS ENDED
                                                        FISCAL YEAR                                FISCAL YEAR ENDED
                                                           ENDED                JUNE 30,           DECEMBER 28, 1996
                                                    --------------------  --------------------  ------------------------
 
<CAPTION>
                                                                                                 SCENARIO     SCENARIO
                                                      1995       1996       1996       1997          1            2
                                                    ---------  ---------  ---------  ---------  -----------  -----------
                                                              (DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
<S>                                                 <C>        <C>        <C>        <C>        <C>          <C>
RESULTS OF OPERATIONS:
    Revenue.......................................  $   2,330  $   2,286  $   1,072  $   1,047   $   2,286    $   2,286
    Net earnings..................................        104        108         36         50         107          105
FINANCIAL POSITION:
    Total assets..................................  $     977  $   1,036             $   1,117
    Current portion of long-term debt.............          2         --                     2
    Long-term debt, less current portion..........          9         12                    16
    Stockholders' equity(3).......................        467        562                   559
PER COMMON SHARE:
    Net earnings:
      Primary.....................................  $    7.78  $   10.13  $    3.46  $    5.34   $   11.21    $   13.12
      Fully diluted...............................       7.62       9.82       3.36       5.13       11.21        13.12
    Dividends(4)..................................       1.05       1.30       0.60       0.70
    Stock price(5)................................      32.40      40.70      31.80      40.00
    Book value....................................      42.90      51.02      45.34      55.38
 
<CAPTION>
 
<S>                                                 <C>          <C>
 
                                                        SIX MONTHS ENDED
                                                         JUNE 30, 1997
                                                    ------------------------
                                                     SCENARIO     SCENARIO
                                                         1            2
                                                    -----------  -----------
 
<S>                                                 <C>          <C>
RESULTS OF OPERATIONS:
    Revenue.......................................   $   1,047    $   1,047
    Net earnings..................................          49           48
FINANCIAL POSITION:
    Total assets..................................   $   1,056    $     996
    Current portion of long-term debt.............           2            2
    Long-term debt, less current portion..........           6            6
    Stockholders' equity(3).......................         505          445
PER COMMON SHARE:
    Net earnings:
      Primary.....................................   $    5.92    $    7.10
      Fully diluted...............................        5.92         7.10
    Dividends(4)..................................
    Stock price(5)................................       42.50        43.00
    Book value....................................       55.92        59.09
</TABLE>
 
- ------------------------
 
(1) The pro forma results of operations data are computed assuming the
    Transaction was consummated on December 31, 1995 and December 29, 1996 for
    the fiscal year ended December 28, 1996 and six months ended June 30, 1997,
    respectively. The pro forma financial position data as of June 30, 1997
    assume that the Transaction was consummated as of such date. The pro forma
    financial data of the Construction Group should be read in conjunction with
    the Construction Group's historical financial statements and the notes
    thereto and the "Pro Forma Financial Information" included elsewhere herein.
 
(2) The pro forma information assumes, in two separate scenarios, that 1,500,000
    shares (Scenario 1) and that 3,000,000 shares (Scenario 2) of Class C Stock
    will be converted in the 1997 Conversion Period.
 
(3) Ownership of Class C Stock is restricted to certain employees and
    conditioned upon the execution of repurchase agreements which restrict the
    employees from transferring the stock. PKS generally must repurchase shares
    of Class C Stock upon demand of the holder of such stock at the
    then-applicable Class C Per Share Price, pursuant to the PKS Certificate.
    The aggregate redemption value of the Class C Stock at June 30, 1997 was
    $404 million.
 
(4) The 1995 and 1996 Class C Stock dividends include $.60 and $.70 per share
    dividends declared in 1995 and 1996, respectively, but paid in January of
    the subsequent year. Pro forma dividends have not been presented as the
    amount of any dividends that may have been declared if the Transaction had
    occurred as of the beginning of the respective periods cannot be determined.
 
(5) Pursuant to the PKS Certificate, the stock price calculation of a share of
    Class C Stock is computed annually at the end of the fiscal year, except
    that adjustments to the stock price to reflect dividends are made at the
    time such dividends are declared.
 
    See "Selected Historical and Pro Forma Financial Data of the Construction
Group" for further information.
 
                                       19
<PAGE>
         RISK FACTORS REGARDING PKS HOLDINGS AFTER THE TRANSACTION AND
                           OWNERSHIP OF THE WARRANTS
 
    If the Transaction is consummated, holders of Class C Stock will receive
shares of PKS Holdings Stock in the Share Exchange and receive Warrants in the
Warrant Distribution. Holders of Class C Stock should consider carefully, in
addition to the other information set forth in this Proxy Statement/Joint
Prospectus, the factors set forth below.
 
LOSS OF CONVERSION RIGHT
 
    Holders of PKS Holdings Stock (I.E., the former holders of Class C Stock)
will have no rights comparable to the Conversion Right, which permits holders of
Class C Stock to convert shares of Class C Stock into Class D Stock.
Consequently, should the Transaction be consummated, the 1997 Conversion Period
would be the final opportunity to convert shares of Class C Stock into Class D
Stock. Since there can be no assurance that the Transaction will be consummated,
holders of Class C Stock who convert their shares of Class C Stock during the
1997 Conversion Period should consider the potential consequences of a failure
to consummate the Transaction. See "Risk Factors Regarding Diversified Holdings
After the Transaction--No Assurance of Transaction Completion" and "--Potential
Consequences of a Failure to Consummate the Transaction."
 
FUTURE SALES OF PKS HOLDINGS STOCK BY PKS HOLDINGS
 
    PKS offers Class C Stock for sale to employees annually. The PKS Board and
management select the employees to whom Class C Stock is to be offered and
determine the number of shares to be offered to each such employee based upon
consideration of a wide range of factors, including the employee's effort and
relative contribution to PKS' economic performance, the employee's level of
responsibility, the potential displayed by the employee, the employee's length
of service, and the amount of Class C Stock presently owned by the employee. The
PKS Board and management also consider any sales or conversions of Class C Stock
by an employee permitted under the PKS Certificate in determining whether to
offer Class C Stock to the employee in the following year and have generally
declined to sell Class C Stock to the employee in the year following such sale
or conversion.
 
    The PKS Holdings Board and management expect to use similar criteria in
determining the PKS Holdings employees to whom PKS Holdings Stock will be
offered, and the number of shares of PKS Holdings Stock to be offered to each
such employee, in 1998. Accordingly, PKS Holdings expects that the PKS Holdings
Board and management will not offer PKS Holdings Stock for sale in 1998 to a
holder of Class C Stock who has converted Class C Stock during the 1997
Conversion Period. Furthermore, PKS Holdings does not intend to modify any
criteria utilized to determine participation in its employee stock ownership
program for purposes of enabling persons who converted Class C Stock during the
1997 Conversion Period to restore a comparable level of holdings of PKS Holdings
Stock to such persons through future sales.
 
LIMITATION OF VALUE OF WARRANTS
 
    The exercise price (the "Exercise Price") of the Warrants is not fixed, but
is equal to the Trading Price (as defined) of the Diversified Holdings Stock
minus the Fixed Dollar Discount (as defined). As a result, the value of the
Warrants is limited to the amount by which the Trading Price exceeds the
Exercise Price, or the Fixed Dollar Discount. The Fixed Dollar Discount can vary
from a minimum of $15.00 per share to a maximum of $25.00 per share, based on
the Trading Price and subject to certain adjustments. Although the Warrant is
being issued in recognition of the potential value of the Conversion Right, the
rights of a holder of a Warrant are not the same as the rights of a holder of
Class C Stock with respect to the Conversion Right. See "Description of the
Warrants."
 
                                       20
<PAGE>
LIMITATIONS ON EXERCISE AND TRANSFER OF THE WARRANTS
 
    The Warrants may not be exercised prior to the earlier to occur of (x) the
exercise period following the December 31, 1999 valuation used to determine the
Exercise Price of the Warrants if Diversified Holdings Stock is not yet publicly
traded and (y) 90 days (subject to extension up to 180 days under certain
circumstances) after Diversified Holdings Stock becomes publicly traded.
Furthermore, a Warrant may only be exercised upon the earliest of (i) the
repurchase or redemption by PKS Holdings of the share of PKS Holdings Stock to
which such Warrant is attached, (ii) the exchange of the share of PKS Holdings
Stock to which such Warrant is attached into another class of securities of PKS
Holdings intended to be issued primarily to persons leaving employment of PKS
Holdings and (iii) April 15, 2006. Notwithstanding the limitations described in
the preceding two sentences, the Warrants will be exercisable after the
occurrence of a change of control of Diversified Holdings. If Diversified
Holdings Stock is not publicly traded, exercisable Warrants may be exercised
during a twenty-day period each year following the notification to the
registered holders of Warrants of the Exercise Price for such year; if
Diversified Holdings Stock is publicly traded, exercisable Warrants may be
exercised during a seven-day period each month. See "Description of the
Warrants."
 
    No Warrant may be transferred prior to the Share Exchange. Following the
Share Exchange and prior to the first day on which a given Warrant becomes
exercisable, such Warrant may only be transferred (i) to Diversified Holdings or
(ii) in a simultaneous transfer to the same transferee with the share of PKS
Holdings Stock to which such Warrant is attached provided that such transfer of
such share of PKS Holdings Stock is permitted by the PKS Holdings Certificate.
See "Description of the Warrants."
 
TRANSFERS FROM THE CONSTRUCTION GROUP
 
    Whenever Class C Stock is converted into Class D Stock, it has been PKS'
practice (although the terms of the PKS Certificate do not require that it do
so) to transfer funds from the Construction Group to the Diversified Group, in
an amount equal to the aggregate Class C Per Share Price of the Class C Stock so
converted, in order that the conversion will not have the effect of diluting the
Class D Formula Value. PKS will take the same action with respect to Class C
Stock converted into Class D Stock during the 1997 Conversion Period. Thus, the
more Class C Stock that is converted during the 1997 Conversion Period, the
greater the funds that will be transferred from the Construction Group to the
Diversified Group. For example, if 1,500,000 shares of Class C Stock were
converted into Class D Stock during the 1997 Conversion Period, PKS would
transfer $72,000,000 from the Construction Group to the Diversified Group; if
3,000,000 shares of Class C Stock were converted into Class D Stock during the
1997 Conversion Period, PKS would transfer $144,000,000 from the Construction
Group to the Diversified Group (calculated in each case assuming a year end 1997
Class C Per Share Price of $48.00). Pursuant to the PKS Certificate, the PKS
Board has set the Conversion Cap, which limits to 3,000,000 shares the number of
shares of Class C Stock that can be converted during the 1997 Conversion Period.
The Construction Group will be required to borrow funds to make the appropriate
transfer. The degree to which PKS Holdings is required to become leveraged
could, under certain circumstances, limit its financial and operating
flexibility. See "The Transaction--Conversion of Class C Stock Prior to the
Transaction."
 
EFFECT OF SEPARATION OF THE BUSINESS GROUPS
 
    The Construction Group from time to time has performed construction services
for Diversified Group companies. After the Transaction is consummated and the
Business Groups are no longer affiliated, opportunities might not be available
to the Construction Group to the same extent as before the Transaction.
 
                                       21
<PAGE>
NO ASSURANCE OF ACHIEVEMENT OF BUSINESS OBJECTIVE
 
    The PKS Board believes that separation of the Business Groups will allow the
management of the Construction Group to focus its attention and financial
resources on its business. Although PKS believes that the Transaction will
enable PKS Holdings to achieve this objective, there can be no assurance as to
whether and to what extent this business objective of the Transaction will be
achieved if the Transaction is consummated. See "The Transaction--Background and
Purposes of the Transaction."
 
CURRENT REGISTRATION STATEMENT AND STATE REGISTRATION REQUIRED TO EXERCISE
  WARRANTS
 
    Diversified Holdings will be able to issue shares of Diversified Holdings
Stock upon exercise of the Warrants only if there is a current registration
statement then in effect with respect to such Diversified Holdings Stock, and
only if such Diversified Holdings Stock is qualified for sale or exempt from
qualification under applicable state securities laws. PKS has undertaken to keep
current a registration statement which will permit the issuance of Diversified
Holdings Stock upon exercise of the Warrants, but there can be no assurance that
it will be able to do so. Although PKS has undertaken to qualify for sale the
shares of Diversified Holdings Stock issuable upon exercise of the Warrants, or
seek an exemption for such sale, under applicable state securities laws, no
assurance can be given that such qualification will occur or that such
exemptions will be available. The Warrants may be deprived of any value and any
market for the Warrants may be limited if a current prospectus covering
Diversified Holdings Stock upon the exercise of the Warrants is not kept
effective or if such Diversified Holdings Stock is not qualified or is not
exempt from qualification in the jurisdiction in which the holders of the
Warrants reside. See "Description of the Warrants."
 
FORWARD-LOOKING INFORMATION MAY PROVE INACCURATE
 
    This Proxy Statement/Joint Prospectus contains certain forward-looking
statements and information relating to PKS Holdings that are based on the
beliefs of PKS or management of PKS or the Construction Group as well as
assumptions made by and information currently available to PKS or such
managements. When used in this document, the words "anticipate", "believe",
"estimate" and "expect" and similar expressions, as they relate to PKS or PKS
Holdings or the management of PKS or the Construction Group, are intended to
identify forward-looking statements. Such statements reflect the current views
of PKS or the Construction Group with respect to future events and are subject
to certain risks, uncertainties and assumptions, including the risk factors
described in this Proxy Statement/Joint Prospectus. Should one or more of these
risks or uncertainties materialize, or should underlying assumptions prove
incorrect, actual results may vary materially from those described herein as
anticipated, believed, estimated or expected. Neither PKS nor PKS Holdings
intends to update these forward-looking statements.
 
                                       22
<PAGE>
       RISK FACTORS REGARDING DIVERSIFIED HOLDINGS AFTER THE TRANSACTION
 
    If the Transaction is consummated, holders of Class D Stock will continue to
hold the shares of Class D Stock which they held immediately prior to the
Effective Time and holders of Class C Stock will receive Warrants. Upon filing
of the Certificate Amendments, Class D Stock will be redesignated and modified
as Diversified Holdings Stock and the Warrants will entitle the holders thereof
to purchase Diversified Holdings Stock. Holders of Class C Stock and Class D
Stock should consider carefully, in addition to the other information set forth
in this Proxy Statement/Joint Prospectus, the factors set forth below.
 
NO ASSURANCE OF ACHIEVEMENT OF BUSINESS OBJECTIVES
 
    The Transaction is intended, among other things, to (i) permit the
Diversified Group to attract and retain the senior management and employees
needed to implement and develop the Diversified Group's Expansion Plan,
including James Q. Crowe and R. Douglas Bradbury, (ii) enable the Diversified
Group to access the capital markets in order to fund the Expansion Plan on more
advantageous terms than would be available to the Diversified Group as part of
PKS, (iii) enable the Diversified Group to pursue strategic investments and
acquisitions, as part of the Expansion Plan, which could be foreclosed to the
Diversified Group as part of PKS and (iv) allow the management of the
Diversified Group to focus its attention and financial resources on its
business. There can be no assurance as to whether and to what extent any of the
business objectives of the Transaction will be achieved if the Transaction is
consummated. See "The Transaction--Background and Purposes of the Transaction."
 
NO ASSURANCE OF TRANSACTION COMPLETION
 
    If the Transaction is consummated, the 1997 Conversion Period will be the
last opportunity for holders of Class C Stock to convert Class C Stock into
Class D Stock. In deciding whether to convert their Class C Stock, such holders
of Class C Stock should recognize that consummation of the Transaction is
subject to stockholder ratification of the Transaction, satisfaction of the Tax
Condition and the decision of the PKS Board to proceed with the Transaction.
Although it is likely that a holder of Class C Stock will know whether PKS
Stockholders have ratified the Transaction before the holder must make a
conversion decision for the 1997 Conversion Period, it is unlikely that a holder
of Class C Stock will know whether the Tax Condition will be satisfied when the
holder makes that decision. Furthermore, the PKS Board could determine to
abandon, defer or modify the Transaction if it were to determine that such
action were in the best interests of all PKS Stockholders. Accordingly, holders
of Class C Stock electing to convert Class C Stock into Class D Stock during the
1997 Conversion Period will have no assurance that the Transaction will be
consummated.
 
POTENTIAL CONSEQUENCES OF A FAILURE TO CONSUMMATE THE TRANSACTION
 
    Pursuant to the executive retention agreement among PKS, KDG and James Q.
Crowe (the "Retention Agreement"), if the Transaction is abandoned and if, as
currently anticipated, Mr. Crowe resigns as Chief Executive Officer of KDG, Mr.
Crowe is entitled to acquire substantially all of the Diversified Group's assets
relating to the Expansion Plan, at the Diversified Group's book value for those
assets, and to pursue the business contemplated by the Expansion Plan outside of
the Diversified Group. It is anticipated that such book value will be
substantially lower than the amount of the Diversified Group's aggregate
investment in such assets. See "Certain Relationships and Related Transactions."
If Mr. Crowe chooses to exercise this purchase right, it is likely that
substantially all of the employees retained to pursue the Expansion Plan would
follow Mr. Crowe. As a result, if the Transaction is abandoned for any reason,
it is possible that Mr. Crowe will leave the Diversified Group, that the
Diversified Group will have to retain new senior management, that the
Diversified Group will not be able to pursue the Expansion Plan and that the
Diversified Group would have to redirect significantly its business strategy.
 
                                       23
<PAGE>
EXPANSION PLAN RISKS
 
    The decision of the Diversified Group to pursue the Expansion Plan entails
significant and substantial risks not presented by the other Diversified Group
businesses or current ownership of Class D Stock. These risks include:
 
    INCREASE IN EMPHASIS ON INFORMATION SERVICES BUSINESS.  The Expansion Plan
represents a major increase in emphasis by the Diversified Group on its
information services business. In addition, the Expansion Plan provides for the
creation of a new facilities-based Internet communications network. The
Expansion Plan is in an early stage of development, thus making an evaluation of
its risks and rewards extremely difficult and speculative. Furthermore, the
Expansion Plan's focus on the information services business and the creation of
an information services network ultimately will reduce the overall
diversification of the Diversified Group's businesses, thus increasing the risk
that a downturn in a single area of business could adversely affect overall
Diversified Group performance.
 
    OPERATING LOSSES.  The Diversified Group has recorded net profits in each
year since it was established. The development of the Expansion Plan, however,
will require significant capital expenditures, a substantial portion of which
will be incurred before any related revenues from the Expansion Plan are
realized. These expenditures, together with the associated early operating
expenses, will result in negative cash flow until an increased customer base is
established, and could result in substantial net losses for the Diversified
Group in the developmental years of the Expansion Plan. There can be no
assurance that Diversified Holdings will be able to achieve or sustain
profitability in the future. In addition, net losses by the Diversified Group
would reduce the formula price at which Diversified Holdings is required to
repurchase Diversified Holdings Stock.
 
    SIGNIFICANT CAPITAL REQUIREMENTS.  Diversified Holdings expects to fund the
Expansion Plan through existing resources, internally generated funds and
additional debt or equity financing as appropriate. In addition, Diversified
Holdings could sell or dispose of existing businesses or investments to fund the
Expansion Plan. There can be no assurance, however, that Diversified Holdings
will be successful in producing sufficient cash flow or raising sufficient debt
or equity capital on terms that it will consider acceptable, and proceeds of
dispositions of Diversified Group assets might not reflect their intrinsic
value. Failure to generate sufficient funds may require Diversified Holdings to
delay or abandon some of its future expansion or expenditures, which could have
a material adverse effect on its growth.
 
    COMPETITION.  All the businesses encompassed by the Expansion Plan are
subject to significant competition from a wide variety of competitors in the
information services and telecommunications industries. Many of these existing
and potential competitors have more experience than the Diversified Group and
financial, personnel and other resources significantly greater than those of the
Diversified Group.
 
    IMPLEMENTATION RISKS.  Implementation of the Expansion Plan will require a
rapid expansion of information services offerings and accelerated development of
a facilities-based Internet network. This expansion and development will depend
on, among other things, Diversified Holdings' ability to assess markets, design
fiber optic network backbone routes, install facilities and obtain
rights-of-way, building access and any required government authorizations and/or
permits. As a result, there can be no assurance that Diversified Holdings will
be able to accomplish all of the tasks necessary to implement the Expansion
Plan. If Diversified Holdings is not able to accomplish those tasks efficiently
and effectively, there will be a material adverse effect on its growth.
 
    RAPID TECHNOLOGICAL CHANGES.  The businesses encompassed by the Expansion
Plan are subject to rapid and significant changes in technology. While
Diversified Holdings believes that, for the foreseeable future, these changes
will not hinder the Expansion Plan, the effect of technological changes on the
Expansion Plan cannot be predicted.
 
                                       24
<PAGE>
    DEPENDENCE ON KEY PERSONNEL.  Diversified Holdings' businesses will be
managed by a small number of key executive officers, particularly James Q.
Crowe, Chief Executive Officer, and R. Douglas Bradbury, Chief Financial
Officer, the loss of certain of whom could have a material adverse effect on
Diversified Holdings. Diversified Holdings believes that its future success will
depend in large part on its ability to attract and retain highly skilled,
knowledgeable, sophisticated and qualified personnel.
 
    OPERATIONAL ISSUES ARISING FROM RAPID GROWTH.  Management of the business of
the Diversified Group has required and will continue to require, among other
things, continued development of financial and management controls, further
controls of operating expenses as well as other costs, and the training of new
personnel. There can be no assurance that Diversified Holdings will be able to
manage successfully this growth and development. As Diversified Holdings
continues this strategy of growth through investment and acquisitions, there can
be no assurance that Diversified Holdings will be able to identify other
suitable candidates for strategic investment and acquisition on acceptable terms
or that it will be able to obtain the requisite financing for any such future
investments or acquisitions. Additionally, there can be no assurance that any
future investments or acquisitions will not have a material adverse effect on
Diversified Holdings' operating results or on the value of Diversified Holdings
Stock, particularly during the period immediately following such acquisitions.
 
LIMITED PUBLIC MARKET FOR DIVERSIFIED HOLDINGS STOCK; NO ASSURANCE AS TO LISTING
 
    There has been an extremely limited market for Class D Stock since its
initial issuance in 1992. Class D Stock is not currently listed for trading on
any stock exchange or market. Diversified Holdings does not expect to list
Diversified Holdings Stock for trading on a stock exchange or market at the
Effective Time. Diversified Holdings expects that it will not seek such a
listing until it raises capital through a public equity offering or desires to
have a listed equity security available for acquisitions. Any determination to
raise public equity capital will depend on a number of factors including,
without limitation, Diversified Holdings' capital needs, the availability and
attractiveness of alternative sources of capital, the performance of Diversified
Holdings and conditions in the public equity markets. Accordingly, no assurance
can be given that Diversified Holdings Stock will be listed for trading in the
future, or, if it is, when such listing will be accomplished or whether an
active trading market will develop or be sustained.
 
MODIFICATION OF REPURCHASE OBLIGATION
 
    Under the PKS Certificate, PKS has an obligation to repurchase Class D Stock
on the terms described under "Comparison of Class D Stock and Diversified
Holdings Stock." The PKS Certificate provides that PKS may deliver promissory
notes with a two-year term to satisfy its repurchase obligation if more than 10%
of the shares of Class D Stock are tendered for repurchase in any calendar year.
Diversified Holdings' obligation to repurchase Diversified Holdings Stock will
be modified by the Certificate Amendments to provide that such promissory notes
will have such term to maturity, up to ten years, as the Diversified Holdings
Board may determine. Thus, holders of Diversified Holdings Stock may, under
certain circumstances, have stock repurchased on less favorable terms than would
holders of Class D Stock.
 
    The modification of the repurchase obligation with respect to Class D Stock
may cause lenders that have extended credit secured by Class D Stock to conclude
that the value of their collateral has been adversely affected and, as a result,
these lenders may require borrowers to provide additional collateral.
Furthermore, lenders may be less willing to extend credit secured by Diversified
Holdings Stock.
 
DIVIDEND POLICY
 
    Diversified Holdings' dividend policy following the Transaction will be
determined by the Diversified Holdings Board. Under Delaware law and the
Diversified Holdings Certificate, the Diversified Holdings Board will not be
required to declare dividends on any class of Diversified Holdings capital stock
and will be free to adopt such dividend policy as it deems appropriate and to
change its dividend policies and practices from time to time. It is not
anticipated that Diversified Holdings will pay dividends to the holders
 
                                       25
<PAGE>
of Diversified Holdings Stock in the foreseeable future. See "Comparison of
Class D Stock and Diversified Holdings Stock."
 
EFFECT OF SEPARATION OF THE BUSINESS GROUPS
 
    The Diversified Group from time to time has been introduced to business
relationships or investment opportunities as a result of its affiliation with
the Construction Group. After the Transaction is consummated, those
relationships and opportunities might not be available to Diversified Holdings.
In addition, the Construction Group has performed and is currently performing
services for businesses of the Diversified Group. Although those service
arrangements are negotiated at arms length, the use of an affiliated contractor
can have many benefits, including ease of contract administration and efficient
resolution of disputes. After the Transaction is consummated, Diversified
Holdings will no longer enjoy the benefits of using an affiliated contractor.
 
CERTAIN LIMITATIONS ON CHANGES IN CONTROL OF DIVERSIFIED HOLDINGS
 
    The Diversified Holdings Certificate and the By-laws of Diversified Holdings
as proposed to be in effect at the Effective Time (the "Diversified Holdings
By-laws") will contain certain provisions which could have the effect of
delaying, deferring or preventing a change in control of Diversified Holdings,
even if such a change would be favorable to the interests of the stockholders of
Diversified Holdings, and of limiting any opportunity to realize premiums over
prevailing market prices for Diversified Holdings Stock in connection therewith.
These provisions include, but are not limited to, provisions providing for the
classification of the Diversified Holdings Board, authorizing the issuance of
preferred stock without stockholder approval and upon such terms as the
Diversified Holdings Board may determine, prohibiting stockholder action by
written consent, and eliminating the ability of stockholders to call special
stockholder meetings and requiring stockholders to comply with certain
procedures in order to nominate persons for election as directors or to
introduce business to be considered at an annual or special meeting of
stockholders. Furthermore, it is anticipated that the Diversified Holdings Board
will adopt a stockholder rights plan (the "Diversified Holdings Rights Plan"),
which could have the effect of delaying, deferring or preventing a change in
control and of limiting any opportunity to realize premiums over prevailing
market prices. See "The Certificate Amendments" and "Comparison of Class D Stock
and Diversified Holdings Stock."
 
DILUTION RESULTING FROM EXERCISE OF WARRANTS
 
    The Warrants are structured so that the Exercise Price will always be at a
discount to the Trading Price (as defined) of Diversified Holdings Stock
throughout the term of the Warrants. Accordingly, substantially all Warrants are
likely to be exercised and the exercise of the Warrants will in all cases cause
dilution to the other holders of Diversified Holdings Stock. Further, the terms
on which Diversified Holdings obtains financing may be affected by the existence
of the Warrants. In addition, the possibility of approximately simultaneous
exercise of significant numbers of Warrants may adversely affect the market
price of the shares of Diversified Holdings Stock. See "Description of the
Warrants."
 
FORWARD-LOOKING INFORMATION MAY PROVE INACCURATE
 
    This Proxy Statement/Joint Prospectus contains certain forward-looking
statements and information relating to Diversified Holdings that are based on
the beliefs of the management of PKS or of the Diversified Group as well as
assumptions made by and information currently available to PKS or such
managements. When used in this document, the words "anticipate", "believe",
"estimate" and "expect" and similar expressions, as they relate to PKS or
Diversified Holdings or the management of PKS or the Diversified Group, are
intended to identify forward-looking statements. Such statements reflect the
current views of the management of PKS or the Diversified Group with respect to
future events and are subject to certain risks, uncertainties and assumptions,
including the risk factors described in this Proxy Statement/Joint Prospectus.
Should one or more of these risks or uncertainties materialize, or should
underlying assumptions prove incorrect, actual results may vary materially from
those described herein as anticipated, believed, estimated or expected. Neither
PKS nor Diversified Holdings intends to update these forward-looking statements.
 
                                       26
<PAGE>
                              THE SPECIAL MEETING
 
DATE, TIME AND PLACE OF THE SPECIAL MEETING
 
    The Special Meeting will be held on           , 1997, at 10:00 a.m. local
time, at the Cloud Room, Kiewit Plaza, Omaha, Nebraska 68131.
 
PURPOSE OF THE SPECIAL MEETING
 
    The Special Meeting is being held to consider and vote upon (i) ratification
of the Transaction and (ii) approval of the Certificate Amendments.
 
RECOMMENDATION OF THE PKS BOARD
 
    The PKS Board has unanimously approved the Transaction and the Certificate
Amendments and recommends that PKS Stockholders vote to ratify the Transaction
and approve the Certificate Amendments. For a description of the reasons for the
Transaction, see "The Transaction--Background and Purposes of the Transaction."
For a description of the reasons for the Certificate Amendments, see "The
Certificate Amendments." Each member of the PKS Board has indicated to PKS that
he intends to vote all of his shares of Class C Stock and Class D Stock to
ratify the Transaction and to approve the Certificate Amendments.
 
SPECIAL MEETING RECORD DATE
 
    PKS Stockholders at the close of business on           , 1997, the Special
Meeting Record Date, are entitled to notice of and to vote at the Special
Meeting.
 
APPRAISAL RIGHTS
 
    PKS Stockholders will not be entitled to appraisal rights as a result of the
Transaction.
 
VOTING
 
    Although stockholder action with respect to the Transaction is not required
under applicable law or the PKS Certificate, the PKS Board has determined to
seek stockholder ratification of the Transaction due to the importance of the
Transaction to PKS and the PKS Stockholders. Ratification of the Transaction
requires the affirmative vote of (i) a majority of the shares of Class C Stock
present and voting at the Special Meeting, voting separately as a class, and
(ii) a majority of the shares of Class D Stock present and voting at the Special
Meeting, voting separately as a class. Approval of the Certificate Amendments
under Delaware law and the PKS Certificate requires the affirmative vote of (x)
at least 80% of the outstanding shares of Class C Stock, voting separately as a
class, (y) a majority of the outstanding shares of Class D Stock, voting
separately as a class, and (z) a majority of the outstanding shares of Class C
Stock and Class D Stock, voting together.
 
    Each share of PKS Stock outstanding at the close of business on the Special
Meeting Record Date is entitled to one vote at the Special Meeting. As of the
Special Meeting Record Date there were       shares of Class C Stock and
      shares of Class D Stock outstanding and entitled to vote at the Special
Meeting. The representation in person or by proxy of at least a majority of the
outstanding shares entitled to vote is necessary to provide a quorum at the
Special Meeting. Abstentions and "non-votes" are counted as present in
determining whether the quorum requirement is satisfied. A "non-vote" occurs
when a broker or other nominee holding shares for a beneficial owner votes on
one proposal, but does not vote on another proposal. Abstentions and "non-votes"
will have the effect of votes against the Certificate Amendments.
 
                                       27
<PAGE>
PROXIES
 
    All shares of PKS Stock represented by properly executed proxies will,
unless such proxies have previously been revoked, be voted at the Special
Meeting in accordance with the directions on the proxies. If no direction is
indicated on a properly executed proxy, the shares will be voted in favor of the
proposals. If any other matters are properly presented at the Special Meeting
for action, which is not anticipated, the proxy holders will vote the proxies
(which confer authority to such holders to vote on such matters) in accordance
with their best judgment. Any PKS Stockholder returning a proxy may revoke it at
any time before it is voted by communicating such revocation in writing to the
Stock Registrar of PKS or by executing and delivering a later-dated proxy. In
addition, any person who has executed a proxy and is present at the Special
Meeting may vote in person instead of by proxy, thereby canceling any proxy
previously given, whether or not written revocation of such proxy has been
given. Any written notice revoking a proxy should be sent to Peter Kiewit Sons',
Inc., 1000 Kiewit Plaza, Omaha, Nebraska 68131, Attention: Stock Registrar.
 
    If a quorum is not present at the time the Special Meeting is convened, or
if PKS believes that additional time should be allowed for the solicitation of
proxies or for any other reason, PKS may adjourn the Special Meeting from time
to time upon a vote of a majority of PKS Stockholders present at the Special
Meeting in person or by proxy. If PKS proposes any adjournment of the Special
Meeting by a vote of PKS Stockholders, the persons named in the enclosed form of
proxy will vote all shares of PKS Stock for which they have voting authority in
favor of such adjournment.
 
SOLICITATION COSTS
 
    PKS will bear the costs of this solicitation. In addition to solicitation by
mail, banks, brokers, and other custodians, nominees and fiduciaries will be
requested to supply proxy material to the beneficial owners of Class C Stock and
Class D Stock of whom they have knowledge, and will be reimbursed for their
expenses in so doing. Certain directors, officers and other employees of PKS,
not specially employed for the purpose, may solicit proxies, without additional
remuneration therefor, by personal interview, mail, telephone or telefax.
 
                                       28
<PAGE>
                                THE TRANSACTION
 
GENERAL
 
    PKS Stockholders are being asked to ratify the decision of the PKS Board to
effect the Transaction, which would separate the Construction Group and the
Diversified Group into two independent companies. The Transaction will be
consummated at the Effective Time, which will be a date to be determined by the
PKS Board after the satisfaction of the conditions of the Transaction. See
"--Conditions of the Transaction." The Transaction consists of the Share
Exchange and the Warrant Distribution. It is currently anticipated that the
Effective Time would occur during the second quarter of 1998. At the Effective
Time, by resolution of the PKS Board pursuant to existing provisions of the PKS
Certificate, the PKS Board will cause each outstanding share of Class C Stock to
be mandatorily exchanged, pursuant to the Share Exchange, for one share of PKS
Holdings Stock.
 
    As a result of the Share Exchange: (i) PKS Holdings, a newly formed, direct,
wholly owned subsidiary of PKS, will become an independent company conducting
the business of the Construction Group, and each share of Class C Stock
outstanding at the Effective Time will be mandatorily exchanged for one share of
PKS Holdings Stock; and (ii) PKS will become an independent company conducting
the business of the Diversified Group, and the shares of Class D Stock
outstanding at the Effective Time will constitute the only outstanding shares of
capital stock of PKS. Immediately following the Share Exchange, PKS Holdings
will be renamed "Peter Kiewit Sons', Inc." and PKS will be renamed "Diversified
Holdings, Inc." Prior to the Effective Time, PKS will effect the Warrant
Distribution by declaring a dividend of eight-tenths of one Warrant with respect
to each then-outstanding share of Class C Stock. At the Effective Time, the
eight-tenths of one Warrant will attach to the share of PKS Holdings Stock which
will be exchanged for such share of Class C Stock in the Share Exchange.
Certificates representing the Warrants will not be distributed until after the
Share Exchange is consummated. See "--The Warrant Distribution." For an
explanation of certain factors to be considered with respect to the Transaction,
see "Risk Factors Regarding PKS Holdings After the Transaction and Ownership of
the Warrants" and "Risk Factors Regarding Diversified Holdings After the
Transaction."
 
BACKGROUND AND PURPOSES OF THE TRANSACTION
 
    THE 1992 AMENDMENT.  In January 1992, PKS Stockholders approved an amendment
to the PKS Certificate (the "1992 Amendment") pursuant to which each share of
PKS' then existing Class C stock was automatically exchanged for one share of
Class C Stock and one share of Class D Stock. The 1992 Amendment also provided
holders of Class C Stock with the right to convert Class C Stock into Class D
Stock, exercisable during the period from October 15 through December 15 of each
year and effective January 1 of the following year, on the basis of the ratio of
the Class C Per Share Price to the Class D Per Share Price in effect on such
January 1. The 1992 Amendment was intended to provide PKS Stockholders with
separate interests in the Business Groups without diminishing the benefits of
remaining a single corporation or restricting PKS future restructuring options,
and to remove potential demands on PKS' equity base presented by the repurchase
obligation as then set forth in the PKS Certificate. The conversion provision
achieved the latter goal by permitting holders of Class C Stock who were leaving
the employment of PKS to convert their Class C Stock, tax-free, into another PKS
equity security instead of selling Class C Stock back to PKS for cash on a
taxable basis.
 
    The Consent Statement and Prospectus of PKS dated November 5, 1991 (the
"Consent Statement") distributed to the holders of the then existing Class C
Stock in connection with the 1992 Amendment acknowledged the possibility of
future public trading of Class D Stock, or of a permanent separation of the
Construction Group and the Diversified Group. In the Consent Statement, PKS
acknowledged that, in the future, it might facilitate the public trading of
Class D Stock depending upon a number of factors, including the desirability of
reducing the Class D Stock repurchase obligation, the need to raise capital by
issuing Class D Stock in the public and private capital markets and the
maturation of the Diversified
 
                                       29
<PAGE>
Group businesses. The Consent Statement also noted that under the 1992
Amendment, PKS could, upon a two-thirds vote of the PKS Board, require a
mandatory exchange of Class D Stock or Class C Stock for the stock of the
related Diversified Group or Construction Group subsidiary in order to
"spin-off" the subsidiary.
 
    DIVERSIFIED GROUP DEVELOPMENT.  At the time of the 1992 Amendment, the
Diversified Group assets included substantial cash resources, coal mining
properties and several smaller investments in start-up or early growth stage
companies, such as PKSIS, MFS and CalEnergy. At the time, the Diversified
Group's cash resources had been derived primarily from the sale of the packaging
and other businesses that had comprised The Continental Group, Inc. Since the
1992 Amendment, the Diversified Group has invested substantial additional sums
in PKSIS, MFS and CalEnergy, and has made significant investments in new
businesses, such as the 1993 acquisition of C-TEC, a series of international
power generation projects with CalEnergy and the joint acquisition with
CalEnergy in 1996 of Northern Electric plc.
 
    As the Diversified Group business has grown, the PKS Board has from time to
time considered proposals intended to address issues created by that growth,
including proposals for the listing of Class D Stock and proposals for the
separation of the Construction Group and the Diversified Group. In 1995, the PKS
Board considered proposals for the listing of Class D Stock and for the
separation of the Business Groups before approving a tax-free spin-off of the
Diversified Group's ownership interest in MFS as a way to provide MFS with the
maximum flexibility possible to raise capital in the public capital markets and
to grow through acquisitions and as a way to address the substantial disparity
at that time between the value of the Diversified Group business, on one hand,
and the Class D Formula Value and Class D Per Share Price, on the other.
 
    MANAGEMENT STUDY OF ALTERNATIVES.  Although the MFS spin-off dealt with some
of the issues facing PKS in 1995, PKS continued to be confronted by issues
created by the growth of the Diversified Group business and the operation of two
very different businesses under a single corporate umbrella. In October 1996,
the PKS Board directed PKS management to pursue a listing of Class D Stock as a
way to deal with certain of those issues and certain other issues created by
PKS' two-class capital stock structure, and shortly thereafter PKS management
began to examine the consequences of a listing of Class D Stock for PKS and the
Business Groups. During the course of its examination of the consequences of a
listing of Class D Stock, PKS management concluded that a listing of Class D
Stock would not adequately address those issues, particularly in light of the
Expansion Plan and the need to attract and retain senior management and
employees, and instead began to study a separation of the Construction Group and
the Diversified Group as a way to address those issues. At the regular meeting
of the PKS Board on July 23, 1997, PKS management submitted for consideration by
the PKS Board a proposal for separation of the Construction Group and the
Diversified Group on substantially the terms eventually approved by the PKS
Board. The PKS Board considered management's proposal at that meeting and at a
special meeting of the PKS Board on August 14, and approved the proposal at its
August 14 meeting.
 
    PKS BOARD CONCLUSIONS.  The PKS Board has concluded that, at some time in
the future, the Diversified Group will be required to access the public equity
capital markets in order to accommodate its growth and development, and in
particular to implement the Expansion Plan. Because Class D Stock is a
"targeted" or "tracking" stock (I.E., stock of a company the economic attributes
of which target or track the financial performance of a subsidiary of the
company), and because the PKS Certificate provides for substantial control by
the holders of Class C Stock over PKS in general and the Diversified Group in
particular, the PKS Board believes that public equity capital markets would
assess a substantial discount to the intrinsic value of Diversified Group's
businesses in determining a public trading price for Class D Stock. Accordingly,
the PKS Board believes that the price of Class D Stock, if publicly traded,
would not reflect the intrinsic value of the Diversified Group businesses and
assets, and that the price might substantially understate that intrinsic value.
The PKS Board has also concluded that substantial tracking stock and control
discounts would not be applied to common stock issued by the Diversified Group
as a
 
                                       30
<PAGE>
stand-alone company and that the trading price of the common stock of a
stand-alone Diversified Group would more closely reflect the intrinsic value of
the Diversified Group's businesses and assets.
 
    The PKS Board has determined that providing the Diversified Group with the
most cost-effective and efficient equity capital instrument will be a key
element in enabling the Diversified Group to continue to grow and develop its
businesses and in particular to design, implement and refine the Expansion Plan
for the following three reasons.
 
    First, in order to continue the growth of the Diversified Group and to
implement the Expansion Plan, PKS will need to attract an experienced and
sophisticated senior management team, and a large group of technologically
sophisticated employees. The PKS Board believes that stock purchase and stock
option plans will be an important component of any compensation program designed
for the Diversified Group's management and employees, and that an efficient and
effective equity currency will be the cornerstone of any such plans. The
decision to separate the Diversified Group and the Construction Group, thus
creating a stand-alone equity currency, was an important factor in recruiting
James Q. Crowe and R. Douglas Bradbury to lead the Diversified Group's
management team. For the reasons described above, the PKS Board believes that
Diversified Holdings Stock will better suit the needs of such equity plans than
would Class D Stock.
 
    Second, the PKS Board believes that the Diversified Group will be required
to spend substantial sums of money over the next few years to continue the
growth of the Diversified Group businesses and implement the Expansion Plan. The
PKS Board has concluded that currently available cash and anticipated cash flow
from conversions of Class C Stock and from existing Diversified Group businesses
will not meet those cash needs. As a result, the PKS Board believes that the
Diversified Group will have to raise significant amounts of capital in the
public and private capital markets, and that the Diversified Group will be able
to raise capital on more cost-effective terms if the Transaction is consummated
and the Diversified Group becomes an independent public company.
 
    Third, the PKS Board believes that strategic investments and acquisitions
might be a key element in permitting the Diversified Group to acquire the assets
and human resources necessary to implement the Expansion Plan. In many
circumstances, publicly traded equity capital is a key to successful and cost-
effective completion of such transactions. The PKS Board, therefore, believes
that a separation of the Business Groups, which will enable the Diversified
Group to issue a stand-alone equity security, will facilitate accomplishment of
such transactions by the Diversified Group.
 
    In addition to the benefits of the Transaction derived from the issuance by
the Diversified Group of a stand-alone equity security, the PKS Board has
determined that a separation of the Diversified Group and the Construction Group
will allow the management of each Business Group to focus its attention and
financial resources on its respective business. Under PKS' current capital
structure, the management of each Business Group devotes considerable time and
attention to the affairs of the other Business Group, thus detracting from its
ability to focus on the operations of its Business Group. These distractions are
exacerbated by significant differences in the types of businesses conducted by
each Business Group, which require each management team to spend substantially
more time understanding the underlying businesses of the other group than it
would spend if the Business Groups were more similar. The PKS Board believes
that the separation of the Business Groups will permit the management of each
Business Group to focus its efforts on its own Business Group.
 
    Based on the foregoing considerations and the advice of Gleacher NatWest,
Inc. ("Gleacher NatWest"), financial advisor to PKS, the PKS Board concluded
that a separation of the Construction Group and the Diversified Group would
address the problems presented by Diversified Group growth and the
implementation of the Expansion Plan better than would a listing of Class D
Stock. A separation of the Business Groups, however, will eliminate the
Conversion Right. Under the PKS Certificate, Class C Stock is converted into
Class D Stock based upon the ratio of the Class C Per Share Price to the Class D
Per
 
                                       31
<PAGE>
Share Price. The PKS Board believes that the Conversion Right currently has
potential value. A separation of the Construction Group and the Diversified
Group and the resulting loss of the Conversion Right would eliminate that
potential value. In formulating the proposal submitted to the PKS Board,
therefore, PKS management, in consultation with Gleacher NatWest, devised the
Warrants to recognize the potential value. The terms of the Warrants were
developed through negotiations between the management of the Construction Group
and the management of the Diversified Group.
 
    The PKS Board has concluded that the Warrants recognize the potential value
of the Conversion Right, without burdening or diluting holders of Class D Stock.
In reaching this conclusion, the PKS Board considered a number of factors,
including: the terms of the Warrants; the PKS Board's assessment of the
potential value of the Conversion Right; estimates of the likely timing of the
exercise of conversion rights by current holders of Class C Stock; the nominal
and actual values of the Warrants to holders of Class C Stock; estimates of the
present value cost of, and resulting dilution from, the Warrants to holders of
Class D Stock; and estimates of the present value cost of, and the dilution
resulting to, holders of Class D Stock from estimated exercises of the
Conversion Right. The PKS Board also considered the advice and analyses
presented by Gleacher NatWest at meetings of the PKS Board on July 23 and August
14, as reflected in the fairness opinion attached as Appendix C hereto.
 
OPINION OF FINANCIAL ADVISOR
 
    In reaching a decision to recommend the Transaction, the PKS Board
considered the advice of PKS' financial advisor, Gleacher NatWest. Gleacher
NatWest was selected to act as financial advisor to PKS based on its
qualifications, expertise and reputation, as well as its investment banking
relationships and familiarity with PKS and its subsidiaries. At the August 14,
1997 meeting of the PKS Board, Gleacher NatWest delivered an oral opinion to the
PKS Board, which was confirmed in writing as of the date of this Proxy
Statement/Joint Prospectus, that based upon the matters set forth in such
opinion, the Transaction is fair from a financial point of view to the holders
of Class C Stock and the holders of Class D Stock. As noted in "--Background and
Purposes of the Transaction", the opinion of Gleacher NatWest was among many
factors considered by the PKS Board in determining to unanimously approve the
Transaction.
 
    A summary of the opinion rendered by Gleacher NatWest with respect to the
Transaction is set forth below. The full text of such opinion, dated as of the
date hereof, which sets forth certain assumptions made, matters considered and
limitations on the review undertaken, is attached as Appendix C hereto and is
incorporated herein by reference. PKS Stockholders are urged to read such
opinion carefully and in its entirety. The summary of the opinion of Gleacher
NatWest set forth herein is qualified by reference to the full text of such
opinion. Gleacher NatWest's opinion is addressed to the PKS Board and does not
constitute a recommendation to any holder of Class C Stock or any holder of
Class D Stock as to how such holder should vote at the Special Meeting.
 
    In arriving at its opinion, Gleacher NatWest, among other things: (i)
reviewed the financial terms of the Transaction as described in this Proxy
Statement/Joint Prospectus and the various agreements relating to the
Transaction referred to in this Proxy Statement/Joint Prospectus; (ii) conducted
discussions with members of management of PKS, the Construction Group and the
Diversified Group with respect to the historical and current businesses and the
future prospects of the Construction Group and the Diversified Group, the
anticipated effects of the Transaction on the capital structures, cash flows and
operations of the Construction Group and the Diversified Group; (iii) analyzed
certain historical and financial information relating to the Construction Group
and the Diversified Group; (iv) reviewed public information as filed with the
Commission relating to PKS, the Construction Group and the Diversified Group,
including audited financial statements; (v) reviewed the terms of the Consent
Statement, relating to the 1992 Amendment; and (vi) conducted such other
financial studies, analyses and investigations as it deemed appropriate.
 
                                       32
<PAGE>
    In rendering its opinion, Gleacher NatWest assumed and relied upon, without
assuming responsibility for independent verification, the accuracy and
completeness of the information reviewed by it. Gleacher NatWest also assumed,
based upon the information which had been provided to it and without assuming
responsibility for independent verification thereof, that no material
undisclosed or contingent liability existed with respect to PKS, the
Construction Group or the Diversified Group. Gleacher NatWest did not make any
independent evaluation or appraisal of the assets or liabilities of the
Construction Group or the Diversified Group. Gleacher NatWest's opinion was
based necessarily on the economic, market and other conditions existing on the
date of its opinion and the information made available to it. Gleacher NatWest
does not make a market in any of the securities of PKS.
 
    No limitations were imposed by PKS or the PKS Board upon Gleacher NatWest
with respect to the investigations made or the procedures followed by Gleacher
NatWest.
 
    The following is a summary of the discussion and analyses presented by
Gleacher NatWest to the PKS Board on August 14, 1997 in connection with
rendering its opinion.
 
    Gleacher NatWest first reviewed the principal terms of the Transaction and
discussed the potential benefits to be derived from the Transaction. In
particular, Gleacher NatWest reviewed the terms of the Warrant Distribution, the
Share Exchange, the Conversion Cap and the Installment Note Program. Gleacher
NatWest also reviewed in detail the terms of the Warrants, including the number
of Warrants to be distributed per share of Class C Stock, the Fixed Dollar
Discount and the adjustments thereto and the exercise and transfer conditions to
the Warrants. In addition, Gleacher NatWest reviewed the Conversion Right.
 
    Gleacher NatWest then provided an analysis of the assets owned by the
Diversified Group and a range of the potential fully diluted trading value of
Class D Stock if such shares were to be listed on a public exchange and if no
tracking stock or control discounts were to be applied to Class D Stock.
Gleacher NatWest noted specifically that such range did not represent an
estimate of the actual trading prices of Class D Stock, and that such actual
trading prices of Class D Stock, in its current form, could be substantially
lower than such range due to the lack of an established trading market for Class
D Stock and the likely application of such discounts to Class D Stock. This
range was determined by taking into account a variety of relevant factors,
including historical and current market values for CalEnergy and C-TEC, internal
valuations for PKS and other illiquid assets, anticipated cash flows (at various
discount rates) for energy projects, the potential dilution represented by the
Conversion Right and estimates of embedded taxes.
 
    Based on an assumed Fixed Dollar Discount of $25.00 per share, Gleacher
NatWest then determined a range of aggregate nominal values for the Warrants and
a range of aggregate present values for the Warrants, depending upon various
estimates of the number of shares of Class C Stock to be converted into Class D
shares during the 1997 Conversion Period. Gleacher NatWest noted that the
present value of the Warrants will depend upon the timing of exercise of the
Warrants and assumptions regarding an appropriate discount rate.
 
    Gleacher NatWest then estimated the potential dilution to holders of Class D
Stock due to the issuance of the Warrants. Gleacher NatWest made estimations
regarding the timing of future Warrant exercises and assumptions regarding the
future growth in the value of Class D Stock and provided a table indicating the
economic dilution under a range of these assumptions.
 
    Based upon the foregoing analyses and considerations, Gleacher NatWest
indicated to the PKS Board that it was Gleacher NatWest's opinion that the
Transaction is fair to both the holders of Class C Stock and the holders of
Class D Stock.
 
    Gleacher NatWest believes that its analyses must be considered as a whole
and that selecting portions of such analyses or any of the factors considered,
without considering all such analyses and factors, could
 
                                       33
<PAGE>
create an incomplete view of the process underlying its analyses and opinion.
The preparation of a fairness opinion is a complex process and is not
susceptible to partial analysis or summary description. Gleacher NatWest has not
indicated that any of the analyses which it performed had a greater significance
than any other. In performing its analyses, Gleacher NatWest made numerous
assumptions with respect to industry performance, general business and economic
conditions and other matters, many of which are beyond the control of PKS. Such
analyses were prepared solely as a part of Gleacher NatWest's analyses of the
fairness of the Transaction to holders of Class C Stock and the holders of Class
D Stock and were provided to the PKS Board in connection with the delivery of
Gleacher NatWest's opinion. The analyses do not purport to be appraisals or
necessarily reflect the prices at which businesses or securities might actually
be sold, which are inherently subject to uncertainty.
 
    Gleacher NatWest is an internationally recognized investment banking and
advisory firm that regularly engages in the valuation of businesses and their
securities in connection with mergers, acquisitions and corporate
restructurings.
 
    PKS retained Gleacher NatWest to provide a wide range of financial advisory
services to PKS and its subsidiaries during a one-year period beginning June 1,
1997 for an aggregate fee of $1.8 million. PKS has also agreed, among other
things, to reimburse Gleacher NatWest for all reasonable out-of-pocket expenses
incurred in connection with the services provided by Gleacher NatWest, and to
indemnify and hold harmless Gleacher NatWest and certain related parties from
and against certain liabilities and expenses, including certain liabilities
under the federal securities laws, in connection with its engagement.
 
    Gleacher NatWest has acted from time to time as a financial advisor to PKS
and affiliates of PKS. During the past several years, Gleacher NatWest has
provided a wide range of financial advisory services and has received customary
fees in connection with such services. In the past, Gleacher NatWest has also
acted as a financial advisor to affiliates of PKS, including MFS. In September
1995, PKS distributed to holders of Class D Stock all of its interest in MFS.
Certain professionals of Gleacher NatWest hold an aggregate of 30,000 shares of
Class D Stock.
 
RECOMMENDATION OF THE PKS BOARD
 
    Based on the foregoing, the PKS Board has determined that the Transaction
and the Certificate Amendments are in the best interests of, and fair to, PKS
and each of the Business Groups, and, therefore, all PKS Stockholders. The PKS
Board has unanimously approved the Transaction and the Certificate Amendments
and recommends that PKS Stockholders ratify the Transaction and approve the
Certificate Amendments by executing and returning the enclosed proxy.
 
EFFECTS OF THE TRANSACTION
 
    CLASS C STOCK.  Upon consummation of the Transaction, each outstanding share
of Class C Stock will be mandatorily exchanged for one fully paid and
nonassessable share of PKS Holdings Stock. Holders of Class C Stock will become
stockholders of PKS Holdings rather than of PKS. PKS Holdings Stock will not
have any preemptive or subscription rights. As stockholders of PKS Holdings,
such holders' rights will continue to be governed by Delaware law and will be
governed by the PKS Holdings Certificate and the By-laws of PKS Holdings as
proposed to be in effect at the Effective Time (the "PKS Holdings By-laws"). The
rights of, and restrictions upon, PKS Holdings Stock under the PKS Holdings
Certificate will be substantially similar to those of Class C Stock under the
PKS Certificate, except that there will be no rights or restrictions comparable
to those in the PKS Certificate relating to Class D Stock. See "Comparison of
Class C Stock and PKS Holdings Stock."
 
    CLASS D STOCK.  Upon consummation of the Transaction and the filing of the
Certificate Amendments, each outstanding share of Class D Stock will remain
outstanding and be subject to the PKS Certificate, as amended by the Certificate
Amendments. The Certificate Amendments will change the
 
                                       34
<PAGE>
name of PKS to "Diversified Holdings, Inc.", redesignate Class D Stock as
"Common Stock, par value $.01 per share", modify the repurchase rights to which
the holders of Class D Stock are entitled, delete the provisions regarding Class
C Stock, add certain corporate governance provisions and make certain other
changes described herein. See "The Certificate Amendments." Upon consummation of
the Transaction, holders of Class D Stock will hold Diversified Holdings Stock.
As stockholders of Diversified Holdings, such holders' rights will continue to
be governed by Delaware law and will be governed by the Diversified Holdings
Certificate and the Diversified Holdings By-laws. See "Comparison of Class D
Stock and Diversified Holdings Stock."
 
THE WARRANT DISTRIBUTION
 
    Prior to the Effective Time, PKS will effect the Warrant Distribution by
declaring a dividend of eight-tenths of one Warrant with respect to each
then-outstanding share of Class C Stock. At the Effective Time, the eight-tenths
of one Warrant will attach to the share of PKS Holdings Stock which will be
exchanged for such share of Class C Stock in the Share Exchange, except as
described in "--Conversion of Class C Stock Prior to the Transaction" below.
Certificates representing the Warrants will not be distributed until after the
Share Exchange is consummated. The Warrants will expire if the Transaction is
abandoned. Persons issued shares of either Class C Stock or PKS Holdings Stock
following the record date for the Warrant Distribution (which will be a date
subsequent to January 1, 1998 to be determined by the PKS Board) will not be
entitled to receive Warrants with respect to such shares.
 
    Each Warrant will entitle the registered holder thereof to purchase, until
April 15, 2010, one share of Class D Stock (or, after the Certificate Amendments
have been effected, one share of Diversified Holdings Stock) at the Exercise
Price which equals the Trading Price minus the Fixed Dollar Discount. The
Trading Price, if the Diversified Holdings Stock is not publicly traded, is a
per share price of Diversified Holdings Stock based on an appraisal as of
December 31 of each year beginning December 31, 1999 by an investment bank of
the value of Diversified Holdings Stock as if Diversified Holdings were a
publicly traded company. The Trading Price, if the Diversified Holdings Stock is
publicly traded, is based on a monthly calculation of the average trading price
during a certain period in the prior month. The Fixed Dollar Discount varies
from $15.00 to $25.00, based on the Trading Price and subject to certain
adjustments. The Exercise Price, the terms used to calculate the Exercise Price
and the number of shares of Diversified Holdings Stock received upon the
exercise of each Warrant are subject to adjustment under certain circumstances.
Since the Exercise Price varies with the Trading Price, the value of the
Warrants is limited to the amount by which the Trading Price exceeds the
Exercise Price of the Warrants, or the Fixed Dollar Discount.
 
    The Warrants may not be exercised prior to the earlier to occur of (x) the
exercise period following the December 31, 1999 valuation if Diversified
Holdings Stock is not yet publicly traded and (y) 90 days (subject to extension
to up to 180 days in certain circumstances) after Diversified Holdings Stock
becomes publicly traded. Furthermore, a Warrant may only be exercised upon the
earliest of (i) the repurchase or redemption by PKS Holdings of the share of PKS
Holdings Stock to which such Warrant is attached, (ii) the exchange of the share
of PKS Holdings Stock to which such Warrant is attached into another class of
securities of PKS Holdings intended to be issued primarily to persons leaving
employment of PKS Holdings and (iii) April 15, 2006. Notwithstanding the
limitations described in the preceding two sentences, the Warrants will be
exercisable after the occurrence of a change of control of Diversified Holdings.
If Diversified Holdings Stock is not publicly traded, exercisable Warrants may
be exercised during a twenty-day period each year following the notification to
the registered holders of Warrants of the Exercise Price for such year; if
Diversified Holdings Stock is publicly traded, exercisable Warrants may be
exercised during a seven-day period each month.
 
    No Warrant may be transferred prior to the Share Exchange. Following the
Share Exchange and prior to the first day on which a given Warrant becomes
exercisable such Warrant may only be transferred (i) if such transfer is being
made to Diversified Holdings or (ii) in a simultaneous transfer to the same
transferee
 
                                       35
<PAGE>
with the share of PKS Holdings Stock to which such Warrant is attached provided
that such transfer of such share of PKS Holdings Stock is permitted by the PKS
Holdings Certificate.
 
    Upon exercising Warrants, a holder will pay to the Warrant Agent (as defined
below) the Exercise Price for the number of shares with respect to which the
Warrants are exercised. The payment will, at the option of the holder, be made
(i) in cash or by certified check or wire transfer of immediately available
funds, (ii) by delivering a number of shares of Diversified Holdings Stock
determined in accordance with a specified formula (a "Share Exercise") or (iii)
by reducing the number of shares of Diversified Holdings Stock that would
otherwise be issuable upon exercise of the Warrants in accordance with a
specified formula (a "Cashless Exercise"). For a discussion of certain U.S.
federal income tax considerations concerning the manner in which a holder elects
to pay the Exercise Price, see "--Certain U.S. Federal Income Tax
Considerations."
 
    See "Risk Factors Regarding PKS Holdings After the Transaction and Ownership
of the Warrants-- Limitations on Exercise and Transfer of the Warrants" and
"Description of the Warrants."
 
EXCHANGE OF CLASS C STOCK; DELIVERY OF CERTIFICATES FOR PKS HOLDINGS STOCK AND
  WARRANTS
 
    By resolution of the PKS Board pursuant to its existing powers under the PKS
Certificate, at the Effective Time each issued and outstanding share of Class C
Stock will be mandatorily exchanged for one share of PKS Holdings Stock.
Accordingly, immediately after the Effective Time, (i) for all purposes of
determining the record holders of PKS Holdings Stock, the holders of Class C
Stock immediately prior to the Effective Time shall be deemed to be holders of
PKS Holdings Stock and (ii) subject to any permitted transfer of such stock,
such holders shall be entitled to receive all dividends payable on, and exercise
voting rights and all other rights and privileges with respect to, PKS Holdings
Stock. PKS will mail, as promptly as practicable, to each record holder of Class
C Stock as of the Effective Time, appropriate documentation for such holder to
use in surrendering the certificates which represented such holder's Class C
Stock in exchange for (x) a certificate representing the number of shares of PKS
Holdings Stock to which such holder is entitled and (y) certificates
representing the Warrants attached to those shares of PKS Holdings Stock.
Holders of shares of Class C Stock will be instructed to mail the certificates
representing such shares to PKS accompanied by such documentation. HOLDERS OF
CLASS C STOCK SHOULD NOT RETURN SUCH CERTIFICATES WITH THE PROXY CARD ENCLOSED
WITH THIS PROXY STATEMENT/JOINT PROSPECTUS. Diversified Holdings will mail, as
promptly as practicable after the Effective Time to each record holder of
Warrants who is not at that time a record holder of Class C Stock, certificates
representing such holder's Warrants.
 
CONDITIONS OF THE TRANSACTION
 
    Consummation of the Transaction is subject to ratification of the
Transaction by the PKS Stockholders and satisfaction of the Tax Condition. The
PKS Board will retain discretion, even if stockholder ratification of the
Transaction is obtained and the Tax Condition is satisfied, to abandon, defer or
modify the Transaction if the PKS Board believes that to do so would be in the
best interests of all PKS Stockholders. Unless the PKS Board determines to
extend the date, the PKS Board intends to abandon the Transaction if it is not
consummated by October 15, 1998. The PKS Board also has determined that if the
Transaction is not ratified, the PKS Board will not proceed with the
Transaction. The Certificate Amendments will be effected only if the Transaction
is consummated. Stockholder approval of the Certificate Amendments is not a
condition to consummation of the Transaction. In the event the Certificate
Amendments are not approved by PKS Stockholders but the Transaction is ratified
and consummated, the Certificate Amendments will be reproposed at a subsequent
meeting of stockholders of Diversified Holdings.
 
                                       36
<PAGE>
CONVERSION OF CLASS C STOCK PRIOR TO THE TRANSACTION
 
    Holders of PKS Holdings Stock (I.E., the former holders of Class C Stock)
will have no rights comparable to the Conversion Right, which permits holders of
Class C Stock to convert shares of Class C Stock into Class D Stock.
Consequently, should the Transaction be consummated, the 1997 Conversion Period
would be the final opportunity to convert shares of Class C Stock into shares of
Class D Stock. Holders of Class C Stock who convert such shares during the 1997
Conversion Period will not receive Warrants with respect to such converted
shares pursuant to the Warrant Distribution.
 
    Under the PKS Certificate, PKS may elect to repurchase any shares of Class C
Stock tendered for conversion into Class D Stock during the 1997 Conversion
Period at the applicable Class C Per Share Price. A tendering holder of Class C
Stock who is an employee of PKS or a 20%-owned subsidiary of PKS may withdraw
the tender of any shares which PKS has elected to repurchase. Pursuant to this
grant of authority, the PKS Board has set the Conversion Cap, which limits to
3,000,000 shares the number of shares of Class C Stock that can be converted
during the 1997 Conversion Period. The PKS Board has imposed the Conversion Cap
in order to limit the potential dilution to holders of Class D Stock resulting
from conversions during the 1997 Conversion Period.
 
    Holders of Class C Stock tendering shares of Class C Stock for conversion
during the 1997 Conversion Period will be required to indicate whether, if the
Conversion Cap applies: (i) such holder desires to receive cash in exchange for
any shares of Class C Stock such holder is unable to convert as a result of the
Conversion Cap; (ii) such holder desires to receive a short-term promissory note
(as described below) for such unconverted stock; or (iii) such holder desires to
have such unconverted stock returned to the holder.
 
    PKS expects that holders of Class C Stock who intend to leave the employment
of PKS at year end 1997 or shortly thereafter will elect to receive cash or a
short-term promissory note for such unconverted stock and that all other holders
of Class C Stock will elect to have such unconverted stock returned to them. PKS
expects to pay cash and deliver promissory notes for unconverted Class C Stock
on or about March 1, 1998. Any such promissory note will be unsecured, will be
payable on January 15, 1999 and will bear interest at an annual rate of 6% from
the date of issuance, payable at maturity. The record date for the Warrant
Distribution will be subsequent to January 1, 1998 and prior to the payment of
cash or delivery of promissory notes for such unconverted stock. All tendering
holders of Class C Stock who are unable to convert shares of Class C Stock into
Class D Stock during the 1997 Conversion Period as a result of the Conversion
Cap will receive Warrants in the Warrant Distribution with respect to such
unconverted shares of Class C Stock. If a holder of Class C Stock elects to
receive cash or a short-term promissory note for any such unconverted Class C
Stock, the related Warrants will be delivered to such holder following
consummation of the Transaction, and will not be attached to any Class C Stock
or PKS Holdings Stock.
 
    If the Transaction is not consummated, PKS intends to offer to sell Class D
Stock to tendering holders of Class C Stock who were unable to convert Class C
Stock as a result of the Conversion Cap and received cash or a short-term
promissory note for such unconverted Class C Stock. PKS intends to offer to each
such Class C holder a number of shares of Class D Stock equal to the number of
shares of Class D Stock into which such unconverted shares of Class C Stock
would have been convertible but for the application of the Conversion Cap, at a
price per share of Class D Stock equal to the Class D Per Share Price as of
January 1, 1998.
 
    Whenever Class C Stock is converted into Class D Stock, it has been PKS'
practice (although the terms of the PKS Certificate do not require that it do
so) to transfer funds from the Construction Group to the Diversified Group, in
an amount equal to the aggregate Class C Per Share Price of the Class C Stock so
converted, in order that the conversion will not have the effect of diluting the
Class D Formula Value. PKS will take the same action with respect to Class C
Stock converted into Class D Stock during the 1997 Conversion Period. Thus, the
more Class C Stock that is converted during the 1997 Conversion Period, the
greater the funds that will be transferred from the Construction Group to the
Diversified Group. For
 
                                       37
<PAGE>
example, if 1,500,000 shares of Class C Stock were converted into Class D Stock
during the 1997 Conversion Period, PKS would transfer $72,000,000 from the
Construction Group to the Diversified Group; if 3,000,000 shares of Class C
Stock were converted into Class D Stock during the 1997 Conversion Period, PKS
would transfer $144,000,000 from the Construction Group to the Diversified Group
(calculated in each case assuming a year end 1997 Class C Per Share Price of
$48.00). See "Risk Factors Regarding PKS Holdings After the Transaction and
Ownership of the Warrants--Transfers from the Construction Group."
 
INSTALLMENT NOTE PROGRAM
 
    If the Transaction is consummated, PKS Holdings intends to institute the
Installment Note Program, to allow holders of PKS Holdings Stock to elect to
receive Installment Notes as an alternative to cash upon repurchase of PKS
Holdings Stock in accordance with the PKS Holdings Certificate. Under the PKS
Certificate and the PKS Holdings Certificate, holders of Class C Stock have, and
holders of PKS Holdings Stock will have, the right to sell Class C Stock or PKS
Holdings Stock to the issuer, at the Class C Per Share Price or PKS Holdings Per
Share Price, as applicable. Any such sales are for cash, which is required to be
paid to the selling holder, without interest, within 60 days of the tender of
the stock to the issuer.
 
    Under the Installment Note Program, PKS Holdings intends to offer to holders
of PKS Holdings Stock who tender stock for sale to PKS Holdings, the option to
receive any or all of the purchase price for the PKS Holdings Stock in an
Installment Note. Installment Notes will have provisions, such as term to
maturity, interest rate, and interest and principal payment terms, as determined
by the PKS Holdings Board from time to time.
 
    PKS Holdings expects that selling holders of PKS Holdings Stock who receive
Installment Notes will be required to recognize gain for U.S. federal income tax
purposes on the sale of the related stock only as principal payments are
received on the Installment Notes. As a result, the Installment Note Program
would permit holders of PKS Holdings Stock to defer taxes that would otherwise
be payable upon a cash sale of such stock to PKS Holdings, although such holders
would be also required to defer receipt of the related portion of the sales
price of such stock. To the extent that the Installment Notes received in any
year by a selling holder of PKS Holdings Stock exceed $5,000,000, such selling
holder will be required to pay interest each year, as additional tax, on part of
the deferred tax liability with respect to the sale of the PKS Holdings Stock
giving rise to the Installment Notes.
 
    PKS intends to implement the Installment Note Program, in part, because the
Conversion Right will be eliminated as a result of the consummation of the
Transaction. The Installment Note Program is merely a tax deferral mechanism,
and is not intended to provide holders of Class C Stock with an investment
comparable to, or having the potential risks and rewards of, a conversion of
Class C Stock into Class D Stock as a result of the exercise of the Conversion
Right. PKS may modify or discontinue the Installation Note Program at any time
without notice to holders of PKS Holdings Stock.
 
ARRANGEMENTS FOR CANADIAN CLASS C HOLDERS
 
    A holder of Class C Stock who is a resident of Canada for Canadian federal
income tax purposes will be subject to tax on receipt of Warrants in the Warrant
Distribution and will realize a capital gain on receipt of PKS Holdings Stock in
the Share Exchange. See "--Certain Canadian Federal Income Tax Considerations."
Consequently, such holders may decide to sell such Class C Stock to PKS,
pursuant to the PKS Certificate, after the Warrant Distribution but prior to the
Share Exchange. PKS Holdings currently intends to provide such selling holders
of Class C Stock with interest-free loans in connection with purchases of PKS
Holdings Stock subsequent to the Share Exchange. The costs of the interest-free
loan arrangements, which are not expected to exceed $6 million, will be
allocated between PKS and PKS Holdings in accordance with the general cost
allocation provisions of the separation agreement between PKS and PKS Holdings
(the "Separation Agreement").
 
                                       38
<PAGE>
CONVERSION OF THE DEBENTURES
 
    Under the terms of the Debentures, which have been offered by PKS in the
past to certain of its senior management employees, holders may convert the
Debentures into Class C Stock during 1998 through 2001. If PKS Stockholders
ratify the Transaction, PKS will permit holders of the Debentures to convert
such Debentures into Class C Stock during a ten-day period subsequent to the
expiration of the 1997 Conversion Period and prior to the Warrant Distribution.
Accordingly, holders of Debentures who convert their Debentures into shares of
Class C Stock will receive Warrants with respect to such shares in the Warrant
Distribution and have such shares exchanged in the Share Exchange. As of August
23, 1997, approximately $9.6 million in principal amount of Debentures was
outstanding. A total of 388,237 shares of Class C Stock would be issuable if all
Debentures were so converted.
 
    PKS is aware that holders of Debentures generally incur indebtedness to fund
the purchase of the Debentures and the Class C Stock into which such Debentures
are convertible. An early conversion of Debentures will cause a holder of
Debentures to pay interest to such holder's borrowings without the offsetting
benefit of interest income from the Debentures. PKS will make available
arrangements to ameliorate the effect of early conversion on holders of
Debentures. The costs of such arrangements, which are not expected to exceed $2
million, will be allocated between PKS and PKS Holdings in accordance with the
general cost allocation provisions of the Separation Agreement. See "Certain
Relationships and Related Transactions."
 
TRADING OF PKS HOLDINGS COMMON STOCK
 
    Shares of Class C Stock are not currently listed for trading on any stock
exchange or market. PKS Holdings Stock will not be listed for trading at the
Effective Time or thereafter.
 
TRADING OF DIVERSIFIED HOLDINGS STOCK
 
    Shares of Class D Stock are not currently listed for trading on any stock
exchange or market. Diversified Holdings does not expect to list Diversified
Holdings Stock for trading on a stock exchange or market at the Effective Time.
Diversified Holdings expects that it will not seek such a listing until it
raises capital through a public equity offering or desires to have a listed
equity security available for acquisitions. Any determination to raise public
equity capital will depend on a number of factors including, without limitation,
Diversified Holdings' capital needs, the availability and attractiveness of
alternative sources of capital, the performance of Diversified Holdings and
conditions in the public equity markets. Accordingly, no assurance can be given
that Diversified Holdings Stock will be listed for trading in the future, or, if
it is, when such listing will be accomplished or whether an active trading
market will develop or be sustained.
 
REQUIRED VOTE FOR THE TRANSACTION
 
    Although stockholder action with respect to the Transaction is not required
under applicable law or the PKS Certificate, the PKS Board has determined to
seek stockholder ratification of the Transaction due to the importance of the
Transaction to PKS and the PKS Stockholders. Ratification of the Transaction
requires the affirmative vote of (i) a majority of the shares of Class C Stock
present and voting at the Special Meeting, voting separately as a class, and
(ii) a majority of the shares of Class D Stock present and voting at the Special
Meeting, voting separately as a class. Approval of the Certificate Amendments
under Delaware law and the PKS Certificate requires the affirmative vote of (x)
at least 80% of the outstanding shares of Class C Stock, voting separately as a
class, (y) a majority of the outstanding shares of Class D Stock, voting
separately as a class, and (z) a majority of the outstanding shares of Class C
Stock and Class D Stock, voting together.
 
                                       39
<PAGE>
CERTAIN U.S. FEDERAL INCOME TAX CONSIDERATIONS
 
    The following is a discussion of certain U.S. Federal income tax
consequences of the Transaction. The discussion which follows is based on the
Code, Treasury regulations promulgated thereunder, and judicial and
administrative interpretations thereof, all as in effect on the date hereof, and
is subject to any changes in these or other laws occurring after such date,
possibly with retroactive effect. The discussion below is for general
information only and does not address the effects of any state, local or foreign
tax laws on the Transaction. A holder of Class D Stock will not receive Warrants
or shares of PKS Holdings Stock in the Transaction and, as a result, will
recognize no income, gain or loss pursuant to the Transaction. The tax treatment
of a holder of Class C Stock may vary depending on his or her particular
situation, and certain stockholders (including "non-U.S. persons" (as defined in
the Code)) may be subject to special rules not discussed below.
 
    EACH HOLDER OF CLASS C STOCK IS URGED TO CONSULT SUCH STOCKHOLDER'S OWN TAX
ADVISOR AS TO THE PARTICULAR TAX CONSEQUENCES OF THE TRANSACTION TO SUCH HOLDER,
INCLUDING THE APPLICABILITY AND EFFECT OF ANY STATE, LOCAL OR FOREIGN LAWS AND
OF CHANGES IN APPLICABLE TAX LAWS.
 
    Consummation of the Transaction is conditioned upon the receipt of the IRS
Rulings to the effect that (i) the exchange of Class C Stock for PKS Holdings
Stock in the Share Exchange will qualify as a transaction described in Section
355(a) of the Code and (ii) the distribution of Warrants pursuant to the Warrant
Distribution will qualify as a distribution described in Section 305(a) of the
Code. However, at any time before the IRS Rulings have been issued, PKS may
elect to effect the Transaction in reliance on the Tax Opinion generally to the
effect that the tax consequences described below should result.
 
    The IRS Rulings and the Tax Opinion (if any) will be based on current law
and on certain representations as to factual matters made by, among others, PKS
and PKS Holdings. Such representations, if incorrect in material respects, could
jeopardize the conclusions reached in the IRS Rulings or the Tax Opinion.
Neither PKS nor PKS Holdings is currently aware of any facts or circumstances
which would cause any such representations required to be made to the IRS or to
counsel to be untrue or incorrect in any material respect. Further, the Tax
Opinion of counsel is not binding on the IRS or any court.
 
    Based on the IRS Rulings and Tax Opinion (if any) discussed above, the
material U.S. federal income tax consequences expected to result from the
Transaction are as follows:
 
        (i) Except as described below, no income, gain or loss will be
    recognized by PKS or PKS Holdings upon the distribution of the Warrants or
    the exchange of Class C Stock for PKS Holding Stock pursuant to the
    Transaction.
 
        (ii) A holder of Class C Stock will not recognize any income, gain or
    loss as a result of (a) the receipt of the Warrants pursuant to the Warrant
    Distribution or (b) the exchange of Class C Stock for PKS Holdings Stock
    pursuant to the Share Exchange.
 
        (iii) A holder of Class C Stock will have, immediately after the
    Transaction, a tax basis for the Warrants and shares of PKS Holdings Stock
    received in the Transaction that is equal to such holder's tax basis in the
    Class C Stock immediately before the Transaction, allocated in proportion to
    the relative fair market values of the Warrants and Class C Stock at the
    time of the Warrant Distribution. (However, if the fair market value of the
    Warrants is less than 15% of the fair market value of the Class C Stock at
    the time of the Transaction, no portion of such tax basis shall be allocated
    to the Warrants unless the holder elects to make such an allocation.)
 
        (iv) The holding period to a holder of Class C Stock for the Warrants
    and shares of PKS Holdings Stock received in the Transaction will include
    the period during which the holder held the Class C Stock with respect to
    which such Warrants and shares of PKS Holdings Stock were distributed,
    provided that such Class C Stock was held as a capital asset.
 
                                       40
<PAGE>
    Notwithstanding the foregoing, PKS will recognize gain on the exchange of
Class C Stock for PKS Holdings Stock pursuant to the Share Exchange to the
extent that shares of PKS Holdings Stock are received by holders of Class C
Stock who are not United States persons ("non-U.S. persons"), as defined in the
Code. The shares of PKS Holdings Stock expected to be distributed to non-U.S.
persons are estimated to represent not more than 6.1% of the total number of
shares of PKS Holdings Stock distributed in the Transaction. Moreover, PKS may
recognize additional gain on account of or with respect to certain aspects of
the Transaction, including certain restructuring transactions expected to be
consummated in connection with the Transaction. The aggregate amount of gain
recognized by PKS in connection with the Transaction is not expected to result
in a material amount of current tax liability.
 
    If the exchange of Class C Stock for PKS Holdings Stock in the Share
Exchange does not qualify as a tax-free exchange under Section 355 of the Code,
then, among other consequences, (i) PKS would recognize gain equal to the amount
by which the fair market value of PKS Holdings Stock distributed to holders of
Class C Stock exceeds PKS' adjusted tax basis therein and (ii) each holder of
Class C Stock who receives shares of PKS Holdings Stock in exchange for such
holder's Class C Stock in the Share Exchange would be treated as having received
a taxable distribution, taxed, depending on such holder's particular
circumstances, either as a dividend to the extent of PKS' available current and
accumulated earnings and profits, or as a sale or exchange giving rise to
capital gain or loss. If the distribution of the Warrants pursuant to the
Warrant Distribution does not qualify as a tax-free distribution under Section
305(a) of the Code, then, among other consequences, each holder of Class C Stock
who receives Warrants pursuant to the Warrant Distribution will be treated as
having received a taxable distribution, taxed to such holder generally as
described in the preceding sentence. The incurrence of significant tax
liabilities by PKS, in the event that the exchange of Class C Stock for PKS
Holdings Stock is not treated as a tax-free exchange under Section 355, may have
a material adverse effect on PKS' business and financial condition.
 
    Treasury regulations governing Section 355 of the Code require that each
stockholder of PKS who receives shares of PKS Holdings Stock pursuant to the
Share Exchange attach a statement to such holder's federal income tax return for
the taxable year in which such holder receives such stock, which statement
indicates the applicability of Section 355 of the Code to the Share Exchange.
PKS will provide each stockholder with the information necessary to comply with
this requirement.
 
    TAX TREATMENT OF WARRANTS.  The following discussion assumes that a holder
will hold the Warrants (and the Diversified Holdings Stock issuable upon the
exercise of the Warrants, if acquired) as capital assets. A holder generally
will not recognize gain or loss upon the exercise of a Warrant where the holder
(i) pays cash to exercise the Warrant or (ii) surrenders shares of Diversified
Holdings Stock to exercise the Warrant pursuant to the Share Exercise, except
with respect to the receipt of cash in lieu of a fractional share of Diversified
Holdings Stock. A holder who receives cash in lieu of a fractional share of
Diversified Holdings Stock will be treated as if such fractional share had been
issued and then immediately redeemed for cash. As a result, the holder will
recognize short-term gain or loss equal to the difference between the amount of
such cash and the holder's tax basis in such fractional share.
 
    Under proposed Treasury regulations governing the treatment of certain
exchanges of stock rights for stock (the "Regulations"), a holder who exercises
a Warrant pursuant to a Cashless Exercise should not recognize gain or loss
(except with respect to the receipt of cash in lieu of a fractional share of
Diversified Holdings Stock), provided that the Regulations are finalized in
their current form without additional elaboration at least 60 days prior to such
exercise. No authority directly addresses the treatment of a Cashless Exercise
under current law. PKS believes that the better view is that, under current law,
a holder who exercises a Warrant pursuant to a Cashless Exercise should not
recognize gain or loss (except with respect to the receipt of cash in lieu of
fractional share of Diversified Holdings Stock) under the theory that exchanges
of stock rights for stock of the same corporation should be treated as an "open
transaction" for federal income tax purposes. Under several alternative
theories, however, it is possible that a holder who exercises a Warrant pursuant
to a Cashless Exercise might be treated as disposing of the Warrant or a portion
thereof in a taxable transaction. In such event, a holder could recognize gain
or loss up to an
 
                                       41
<PAGE>
amount equal to the difference between the value of the Diversified Holdings
Stock received (plus any cash in lieu of a fractional share) and the holder's
tax basis in the Warrants surrendered therefor. Holders should consult their own
tax advisors regarding the consequences of a Cashless Exercise.
 
    A holder's tax basis in the shares of Diversified Holdings Stock received
upon the exercise of Warrants (including any fractional share interest therein)
generally will equal the sum of the holder's tax basis in the Warrants
immediately prior to exercise plus (i) the amount of cash paid upon exercise,
(ii) the holder's tax basis in any shares of Diversified Holdings Stock
surrendered pursuant to a Share Exercise and (iii) the amount of the gain or
other income, if any, recognized as a result of a Cashless Exercise.
 
    If a holder exercises Warrants by paying cash, such holder's holding period
for the shares of Diversified Holdings Stock (including any fractional share
interest therein) acquired pursuant to the exercise of Warrants generally will
begin on the day after the date of exercise. If a holder exercises Warrants
pursuant to a Share Exercise, such holder's holding period for a number of
shares of Diversified Holdings Stock acquired equal to the number of shares of
Diversified Holdings Stock surrendered will include the period during which the
holder held such Diversified Holdings Stock surrendered, and such holder's
holding period for the remainder of the shares of Diversified Holdings Stock
acquired will begin on the day after the date of exercise. If a holder exercises
Warrants pursuant to a Cashless Exercise and no gain or loss is recognized upon
such exercise (except with respect to cash in lieu of a fractional share) under
the Regulations or an "open transaction" analysis, such holder's holding period
for shares of Diversified Holdings Stock acquired will include the period during
which the holder held the Warrants surrendered. If a holder recognizes gain or
loss upon a Cashless Exercise (other than solely with respect to cash in lieu of
a fractional share), such holder's holding period for shares of Diversified
Holdings Stock acquired will begin on the date after the date of exercise.
 
    Upon the expiration of unexercised Warrants, a holder generally will
recognize a long-term capital loss equal to the tax basis of such Warrants. Upon
a sale or other taxable transfer of Warrants to persons other than Diversified
Holdings, a holder generally will recognize a capital gain or loss equal to the
difference between the amount of cash and the fair market value of any property
received in exchange therefor and the holder's tax basis in the Warrants, which
would be a long-term capital gain or loss if the holder has held the Warrants
for more than one year. Long-term capital gains recognized by individual
taxpayers are taxed at a maximum rate of 28%. Recently-enacted legislation
generally reduces the maximum capital gains rate to 20% for capital assets held
for more than eighteen months.
 
    An adjustment in the exercise price or the number of shares to be received
upon exercise of the Warrants may, in certain circumstances, result in
constructive distributions to holders of Warrants which could be taxable as
dividends. A holder's tax basis in a Warrant generally would be increased by the
amount of any such dividend.
 
    BECAUSE OF THE INDIVIDUAL NATURE OF TAX CONSEQUENCES, EACH HOLDER OF CLASS C
STOCK IS URGED TO CONSULT ITS TAX ADVISOR WITH RESPECT TO THE TAX CONSEQUENCES
TO SUCH HOLDER OF THE TRANSACTION, INCLUDING THE EFFECT OF U.S. FEDERAL, STATE
AND LOCAL, AND FOREIGN AND OTHER TAX LAWS, AND THE EFFECT OF POSSIBLE CHANGES IN
SUCH TAX LAWS.
 
CERTAIN CANADIAN FEDERAL INCOME TAX CONSIDERATIONS
 
    The following is a summary of the principal Canadian federal income tax
considerations generally applicable under the Canadian Act to a holder of Class
C Stock who receives Warrants in the Warrant Distribution and shares of PKS
Holdings Stock in the Share Exchange and who, for purposes of the Canadian Act,
is a resident of Canada, holds Class C Stock, and will hold the Warrants and
Class D Stock acquired upon exercise of the Warrants, as capital property and
deals at arm's length with PKS (a "Canadian C Holder").
 
                                       42
<PAGE>
    This summary is based on the current provisions of the Canadian Act and the
regulations thereunder (the "Canadian Regulations") in force on the date hereof,
specific proposals (the "Tax Proposals") to amend the Canadian Act or the
Canadian Regulations publicly announced by the Minister of Finance prior to the
date hereof and an understanding of the current administrative and assessing
practices of Revenue Canada, Customs, Excise and Taxation ("Revenue Canada").
Except for the Tax Proposals, this summary does not take into account or
anticipate any proposed changes to the law or to Revenue Canada's administrative
and assessing practices, whether by legislative, governmental or judicial
actions.
 
    THE FOLLOWING DISCUSSION IS INTENDED TO BE A GENERAL DESCRIPTION OF THE
CANADIAN FEDERAL INCOME TAX CONSIDERATIONS GENERALLY APPLICABLE TO A CANADIAN C
HOLDER BY REASON OF THE TRANSACTION AND IS NOT INTENDED TO BE, NOR SHOULD IT BE
CONSTRUED AS BEING, LEGAL OR TAX ADVICE TO ANY PARTICULAR HOLDER. EACH CANADIAN
C HOLDER IS URGED TO CONSULT SUCH HOLDER'S OWN TAX ADVISOR AS TO THE PARTICULAR
TAX CONSEQUENCES OF THE TRANSACTION TO SUCH HOLDER, INCLUDING THE APPLICABILITY
AND EFFECT OF ANY PROVINCIAL, LOCAL OR FOREIGN LAWS AND OF CHANGES IN APPLICABLE
TAX LAWS.
 
    TREATMENT OF THE WARRANT DISTRIBUTION.  A Canadian C Holder will be required
to include in computing such holder's income an amount equal to the fair market
value of any Warrants received by way of dividend in the Warrant Distribution.
The Warrant Distribution will not be eligible for the gross-up and dividend tax
credit generally applicable to dividends received in respect of shares of
taxable Canadian corporations nor will any Canadian C Holder which is a
corporation be entitled to a deduction in computing taxable income in respect of
such dividend. A Canadian C Holder will generally be entitled to a deduction
equal to any U.S. tax required to be deducted or withheld in respect of such
dividend in computing his or her tax otherwise payable in respect of such
dividend. The cost to a Canadian C Holder of the Warrants received in the
Warrant Distribution will be an amount equal to the fair market value of such
Warrants.
 
    The exercise of Warrants will not constitute a disposition of property for
purposes of the Canadian Act. A share of Class D Stock acquired by a Canadian C
Holder upon the exercise of a Warrant will have a cost equal to the aggregate of
the exercise price under such Warrant and the adjusted cost base to such
Canadian C Holder of the Warrant so exercised. A Canadian C Holder who disposes
of a Warrant will realize a capital gain (or a capital loss) to the extent that
the proceeds of disposition thereof, net of any reasonable costs of disposition
exceed (or are exceeded by) the Canadian C Holder's adjusted cost base of the
Warrant. Upon the expiration of an unexercised Warrant, the Canadian C Holder
will realize a capital loss equal to the adjusted cost base of the Warrant to
such Canadian C Holder.
 
    EXCHANGE OF CLASS C STOCK IN THE SHARE EXCHANGE.  A Canadian C Holder who
receives shares of PKS Holdings Stock in the Share Exchange will generally
realize a capital gain (or a capital loss) to the extent that the fair market
value of the PKS Holdings Stock received in the Share Exchange exceeds (or is
exceeded by) the Canadian C Holder's adjusted cost for the Class C Stock.
 
    The cost to a Canadian C Holder of the shares of PKS Holdings Stock received
in the Share Exchange should be equal to the fair market value of such PKS
Holdings Stock, determined at the time of such exchange.
 
    FOREIGN CURRENCY TRANSLATION ISSUES.  Generally speaking, all amounts
relevant to the computation of income under the Canadian Act which are paid,
received or expressed in foreign currency must be translated into Canadian
dollars using an appropriate exchange rate. A Canadian C Holder's cost of Class
C Stock and Class D Stock will be translated into Canadian dollars at the date
of the acquisition thereof. The fair market value of the Warrants and the fair
market value of the PKS Holdings Stock received in the Share Exchange must be
translated into Canadian dollars at the date of acquisition thereof.
 
                                       43
<PAGE>
NEBRASKA TAX RULING
 
    PKS has applied to the State of Nebraska Department of Revenue for a ruling
to the effect that even though PKS and PKS Holdings will become independent
companies if the Transaction is consummated, PKS and PKS Holdings would continue
to be considered the same corporation for purposes of the Nebraska capital gain
exclusion provisions (the "Nebraska Ruling"). Accordingly, provided certain
requirements are met and an appropriate election is made, such capital gain
exclusion would be available for the sale of PKS Holdings Stock. If PKS does not
receive the Nebraska Ruling or an opinion of tax counsel generally to the same
effect as the requested Nebraska Ruling, by the date upon which the Tax
Condition is satisfied, the PKS Board may review the benefits of the Transaction
in light of the failure to receive the Nebraska Ruling or such opinion, and
could determine to abandon, defer or modify the Transaction if it determined
that such action would be in the best interests of all PKS Stockholders.
 
REGULATORY APPROVALS
 
    PKS does not believe that any material federal or state regulatory approvals
will be necessary in connection with the Transaction.
 
APPRAISAL RIGHTS
 
    PKS Stockholders will not be entitled to appraisal rights as a result of the
Transaction.
 
ACCOUNTING TREATMENT
 
    Upon consummation of the Transaction, the historical consolidated financial
statements of PKS will be retroactively restated, where appropriate, to
disaggregate the historical basis financial information of the Construction
Group, and present the business of the Construction Group as discontinued
operations. PKS, which will be renamed "Diversified Holdings, Inc." following
the consummation of the Transaction, will account for the Share Exchange using
the historical cost basis of the Construction Group and following the
Transaction will continue to account for its results on an historical cost
basis. After the Transaction the business of the Construction Group will be
operated by PKS Holdings and will continue to be reflected in the separate
financial statements of PKS Holdings on an historical cost basis.
 
POST-TRANSACTION ARRANGEMENTS BETWEEN PKS HOLDINGS AND DIVERSIFIED HOLDINGS
 
    PKS and PKS Holdings have entered into various agreements intended to
implement the Transaction, including the agreements described below. The
agreements described below are included as exhibits to the Registration
Statement of which this Proxy Statement/Joint Prospectus is a part, and the
descriptions below are qualified by reference to those agreements.
 
    SEPARATION AGREEMENT.  The Separation Agreement provides for the principal
corporate transactions necessary to consummate the Transaction, the relationship
between PKS Holdings and Diversified Holdings after the Transaction, the
allocation of certain risks and responsibilities between PKS Holdings and
Diversified Holdings after the Transaction and certain other matters.
 
    The Separation Agreement provides for the Share Exchange, the Warrant
Distribution and certain internal corporate transactions necessary to consummate
the Transaction. The Separation Agreement provides that each of Diversified
Holdings and PKS Holdings will indemnify the other with respect to breaches of
the Separation Agreement and with respect to the activities of its subsidiary
business groups, except as specifically provided under the Tax Allocation
Agreement (as defined below). The cross-indemnities are intended to allocate
financial responsibility for liabilities arising out of the historical and
future business of the Construction Group to PKS Holdings, and financial
responsibility for liabilities arising out of the historical and future business
of the Diversified Group to Diversified Holdings. The Separation Agreement also
allocates between Diversified Holdings and PKS Holdings certain corporate-
 
                                       44
<PAGE>
level risk exposures not readily allocable to one or the other. The Separation
Agreement also provides for the allocation between Diversified Holdings and PKS
Holdings of costs and benefits under existing insurance policies and
arrangements.
 
    The Separation Agreement provides for the division between the Construction
Group and the Diversified Group of any assets (other than corporate
subsidiaries) held directly by PKS immediately prior to the Share Exchange.
 
    The Separation Agreement provides that PKS will change its name to
Diversified Holdings, Inc. not later than the date of the filing of the
Certificate Amendments in the State of Delaware, and that PKS and all of its
subsidiaries will assign to PKS Holdings any and all right, title and interest
in and to any corporate name, tradename or trademark using the initials "PKS" or
the names "Peter Kiewit Sons', Inc." or "Kiewit," and any other proprietary
right with respect to those names or related symbols, and will refrain from
using any such property right in connection with the future conduct of its
businesses. PKSIS, however, will be entitled to continue to use its current
corporate name for a period of two years after the Effective Time.
 
    The Separation Agreement also sets forth certain covenants of Diversified
Holdings and PKS Holdings intended to ensure that certain transactions, such as
material asset acquisitions, material asset dispositions and repurchases of
capital stock do not occur after consummation of the Transaction unless adequate
assurance has been received that such transactions will not adversely affect the
intended tax consequences of the Transaction. Diversified Holdings and PKS
Holdings do not anticipate that these restrictions will have a material adverse
effect on their respective business, operations or growth opportunities.
 
    The Separation Agreement provides that each of Diversified Holdings and PKS
Holdings will be granted access to certain records and information in the
possession of the other company, and requires that each of Diversified Holdings
and PKS Holdings retain all such information in its possession for a period of
ten years following the Transaction. Under the Separation Agreement, each
company is required to give the other company prior notice of any intention to
dispose of any such information.
 
    The Separation Agreement provides that, except as otherwise set forth
therein or in any related agreement, all costs and expenses in connection with
the Transaction will be paid 82.5% by Diversified Holdings and 17.5% by PKS
Holdings.
 
    TAX ALLOCATION AGREEMENT.  PKS and PKS Holdings have entered into a tax
allocation agreement (the "Tax Allocation Agreement") that defines each
company's rights and obligations with respect to deficiencies and refunds of
federal, state and other taxes relating to the Business Groups' operations for
tax years (or portions thereof) ending prior to the Transaction and with respect
to certain tax attributes of Diversified Holdings and PKS Holdings after the
Transaction. In general, with respect to periods (or portions thereof) ending on
or before the Effective Time, PKS Holdings will be responsible for preparing
both consolidated federal tax returns for the consolidated group, and state tax
returns for the combined and any subsidiary group. In general, under the Tax
Allocation Agreement, Diversified Holdings and PKS Holdings will be responsible
for paying the taxes relating to such returns (including any subsequent
adjustments resulting from the redetermination of such tax liabilities by the
applicable taxing authorities) that are allocable to the Diversified Group
business and the Construction Group business, respectively. Diversified Holdings
and PKS Holdings will cooperate with each other and share information in
preparing such tax returns and in dealing with other tax matters.
 
EXISTING ARRANGEMENTS AND RELATIONSHIPS
 
    Although PKS and PKS Holdings will become two independent companies if the
Transaction is consummated, it is anticipated that PKS and PKS Holdings will
continue certain existing business arrangements and relationships, as described
below.
 
                                       45
<PAGE>
    MINE MANAGEMENT AGREEMENT.  The Construction Group and the Diversified Group
are currently discussing a number of possible changes to their existing
relationship with respect to the coal mining properties operated by the
Construction Group. These possible changes could include a restructuring of the
current mine management arrangement between the two Business Groups, the
formation of a partnership between the two Business Groups to hold all of their
interests with respect to the mining properties, the transfer by the Diversified
Group to the Construction Group of its interests in the mining joint ventures or
other transaction.
 
    KIEWIT INVESTMENT MANAGEMENT.  The Diversified Group owns 60% of, and the
Construction Group owns 40% of, the capital stock of Kiewit Investment
Management Corp., a registered investment adviser that manages the Kiewit Mutual
Fund. See "Appendix B--Business of Diversified Holdings--Kiewit Mutual Fund."
 
    OTHER SERVICES.  PKSIS currently provides certain information services to
the Construction Group, and the Construction Group currently provides certain
aircraft flight and maintenance services to the Diversified Group. The Business
Groups believe that such services are provided on an arms length basis, and
expect that such services will continue to be provided after the Transaction is
consummated.
 
                                       46
<PAGE>
                           THE CERTIFICATE AMENDMENTS
 
GENERAL
 
    The PKS Board has approved, and recommends that PKS Stockholders approve,
the Certificate Amendments to become effective only upon the consummation of the
Transaction. The Diversified Holdings Certificate, which is a restatement of the
PKS Certificate after giving effect to the Certificate Amendments, is attached
as Appendix E hereto.
 
    The Diversified Holdings Certificate incorporates into a single document the
amendments to the PKS Certificate to account for the single-class capital
structure of Diversified Holdings following the Transaction, and, in addition,
reflects the deletion or modification of certain provisions of the PKS
Certificate which will be made unnecessary or ineffective by the consummation of
the Transaction. In particular, the Certificate Amendments: (i) change the name
of PKS from "Peter Kiewit Sons', Inc." to "Diversified Holdings, Inc."; (ii)
redesignate Class D Stock as "Common Stock, par value $.01 per share"; (iii)
increase the number of shares of Diversified Holdings Stock which Diversified
Holdings is authorized to issue from 50,000,000 to 500,000,000 shares; (iv)
authorize the issuance of series of preferred stock, the terms of which are to
be determined by the Diversified Holdings Board; (v) modify the repurchase
rights to which the holders of Class D Stock are entitled; (vi) delete the
provisions regarding Class C Stock; (vii) classify the Diversified Holdings
Board; (viii) prohibit stockholder action by written consent; (ix) empower the
Diversified Holdings Board, exclusively, to call special meetings of the
stockholders; (x) require a super-majority vote of stockholders to amend the
Diversified Holdings By-laws; and (xi) modify certain other provisions of the
PKS Certificate. Certain other provisions of the Diversified Holdings
Certificate, such as those with respect to indemnification and limitation of
liability of directors, while amended by the Certificate Amendments, will be
substantially the same as the corresponding provisions in the PKS Certificate.
 
CAPITAL STRUCTURE OF DIVERSIFIED HOLDINGS
 
    As a result of the Transaction, Diversified Holdings will be an independent
company holding the assets of the Diversified Group, and holders of Class D
Stock will hold all of the outstanding shares of the single class of Common
Stock, par value $.01 per share, of Diversified Holdings as a result of the
redesignation of Class D Stock. The following amendments to the PKS Certificate
are proposed in connection with the new capital structure of Diversified
Holdings following the Transaction and certain corporate governance matters.
 
    REDESIGNATION OF CLASS D STOCK.  Holders of Class D Stock will hold the only
outstanding class of capital stock of Diversified Holdings. The Class D Stock
will be redesignated as "Common Stock, par value $.01 per share." For a
comparison of Class D Stock and Diversified Holdings Stock, see "Comparison of
Class D Stock and Diversified Holdings Stock."
 
    DELETION OF CERTAIN PROVISIONS AND REFERENCES.  Following the Share
Exchange, Class C Stock will have been mandatorily exchanged for PKS Holdings
Stock, and Diversified Holdings will no longer own the Construction Group. In
addition, as of January 1997 all outstanding shares of PKS Class B Construction
& Mining Group Nonvoting Restricted Redeemable Convertible Exchangeable Common
Stock, par value $.0625 per share ("Class B Stock"), were converted into shares
of Class D Stock. For these reasons, it will not be necessary for the
Diversified Holdings Certificate to provide the terms of, or otherwise make
reference to, either of Class C Stock or Class B Stock. Upon adoption of the
Certificate Amendments, all such provisions and references to Class C Stock or
Class B Stock, including provisions related to the conversion, voting and
repurchase and other rights, will be deleted in their entirety from the
Diversified Holdings Certificate.
 
    AUTHORIZATION OF PREFERRED STOCK.  The Certificate Amendments include a
provision authorizing 10,000,000 shares of preferred stock and authorize the
Diversified Holdings Board to issue such shares of preferred stock in one or
more series. Each such series may have such rights, preferences, privileges and
 
                                       47
<PAGE>
restrictions, including voting rights, dividend rights, conversion rights,
redemption privileges and liquidation privileges, as may be determined by the
Diversified Holdings Board. Under the PKS Certificate, the PKS Board is
authorized to establish the terms and issue one or more series of preferred
stock; however, the terms of such preferred stock may not include voting rights
and may not provide for conversion of such preferred stock into voting stock.
Currently, there are no shares of PKS preferred stock issued and outstanding.
See "Risk Factors Regarding Diversified Holdings After the Transaction--Certain
Limitations on Changes in Control of Diversified Holdings."
 
    REMOVAL OF CERTAIN OTHER PROVISIONS.  Certain provisions of the PKS
Certificate will be made unnecessary or otherwise ineffective by the
consummation of the Transaction, or are already provided as a matter of Delaware
law. Such provisions include, but are not limited to: (i) provisions for the
mandatory exchange of Class D Stock; (ii) provisions for the general duties of
officers; (iii) provisions allowing for the ratification of any contract,
transaction or act by a majority of a quorum of stockholders; and (iv) the
provision allowing for the holding of stockholder and board meetings and the
keeping of offices outside of the State of Delaware. The Diversified Holdings
Certificate will not contain such provisions. For a more detailed description of
the mandatory exchange provisions related to Class D Stock, see "Comparison of
Class D Stock and Diversified Holdings Stock."
 
BOARD OF DIRECTORS
 
    As a result of the Certificate Amendments, the Diversified Holdings Board
will be divided into three classes, designated Class I, Class II and Class III,
each class consisting, as nearly as may be possible, of one-third of the total
number of directors constituting the Diversified Holdings Board. The term of the
initial Class I directors will terminate on the date of the 1998 annual meeting
of stockholders; the term of the initial Class II directors will terminate on
the date of the 1999 annual meeting of stockholders; and the term of the initial
Class III directors will terminate on the date of the 2000 annual meeting of
stockholders. At each annual meeting of stockholders beginning in 1998,
successors to the class of directors whose term expires at that annual meeting
will be elected for three-year terms. Accordingly, approximately one-third of
the Diversified Holdings Board will be elected each year. See "Diversified
Holdings Directors and Executive Officers."
 
    Notwithstanding any limitation in the Diversified Holdings Certificate on
the maximum number of directors, if holders of Diversified Holdings preferred
stock have the right to elect a specified number of directors, the election,
term of office, filling of vacancies and other features of such directorships
will be governed by the terms of such preferred stock.
 
    If the number of directors is changed, any increase or decrease will be
apportioned among the classes so as to maintain the number of directors in each
class as nearly equal as possible, and any additional director of any class
appointed to fill a vacancy resulting from an increase in the number of such
class will hold office for a term that will coincide with the remaining term of
that class, but in no case will a decrease in the number of directors shorten
the term of any incumbent director. In accordance with the Diversified Holdings
Certificate and Delaware law, directors may be removed only for cause because
the Diversified Holdings Board is classified. In addition, a director will hold
office until the annual meeting for the year in which his term expires and until
his successor will be elected, subject, however, to prior death, resignation,
retirement or removal from office. Any vacancy occurring in the Diversified
Holdings Board may be filled only by a vote of the majority of the directors
then in office, even if less than a quorum, or by a sole remaining director.
 
    Board classification provision is advantageous to Diversified Holdings and
its stockholders because, by providing that directors will serve three-year
terms rather than one-year terms, it will enhance the likelihood of continuity
and stability in the composition of the Diversified Holdings Board and in the
policies formulated by it. This will in turn permit the Diversified Holdings
Board to represent more effectively the interests of all stockholders, including
the taking of action in response to demands or actions
 
                                       48
<PAGE>
by a minority stockholder or group. In addition, this provision ensures that a
majority of the directors at any given time will have had prior experience as
directors of Diversified Holdings.
 
    NUMBER OF DIRECTORS.  The PKS Certificate provides for between nine and 15
directors, as determined by the By-laws of PKS (the "PKS By-laws"). Such
authorized number of directors may be increased no more than twice during any
twelve-month period. The Diversified Holdings Certificate will provide that the
number of directors will be fixed between six and 15, and vacancies on the
Diversified Holdings Board may only be filled by the Board. The effect of the
Diversified Holdings Certificate and By-laws is that the Diversified Holdings
Board could prevent any stockholder from obtaining majority representation on
the Diversified Holdings Board by expanding the size of the Diversified Holdings
Board, and filling the new directorships with its own nominees.
 
    POWERS OF THE BOARD.  The PKS Certificate specifically enumerates a number
of powers and limitations on powers of the PKS Board. The limitations typically
require approval of two-thirds of the directors and/ or a supermajority vote of
the stockholders (in most cases the holders of 80% of the Class C Stock
outstanding) in order for the PKS Board or PKS to take certain actions; these
limitations are primarily related, directly or indirectly, to the unique nature
of the PKS capital and management structure. As Diversified Holdings will
possess a more standard capital and management structure, such limitations are
not appropriate for Diversified Holdings. Therefore, such limitations are not
included in the Diversified Holdings Certificate, although all supermajority
voting rights will be maintained in the Diversified Holdings Certificate in
respect to the Diversified Holdings Stock. Under the Diversified Holdings
Certificate, although the powers of the Diversified Holdings Board will not be
specifically enumerated, the Diversified Holdings Board will have complete power
to manage the business and affairs of Diversified Holdings, as provided under
the Delaware General Corporation Law (the "DGCL").
 
    See "--Reasons for the Corporate Governance Provisions" for additional
background discussion relating to these provisions.
 
STOCKHOLDER CONSENT
 
    The Diversified Holdings Certificate will provide that stockholders of
Diversified Holdings may only take action at an annual or special meeting and
may not act by written consent. The PKS Certificate does not contain such a
general prohibition. Under the DGCL, unless otherwise provided in a
corporation's certificate of incorporation, any action which is required or
permitted to be taken at an annual or special meeting of stockholders may
instead be taken without a meeting, without prior notice and without a vote, if
a written consent setting forth the action to be taken is signed by the holders
of outstanding shares of stock having not less than the minimum number of votes
that would be necessary to authorize such action at a meeting of stockholders at
which all shares entitled to vote thereon were present and voting.
 
    By prohibiting stockholders from acting by written consent, the Diversified
Holdings Certificate will limit the ability of any stockholder to take action
immediately and without prior notice to the Diversified Holdings Board, and
would allow stockholders to act only at an annual or special meeting. As a
result, the Diversified Holdings Certificate ensures that all stockholders will
have the opportunity to consider any matter that could affect their rights.
However, such a limitation on a majority stockholder's ability to act might
impact upon such person's or entity's decision to purchase voting securities of
Diversified Holdings.
 
    See "--Reasons for the Corporate Governance Provisions" for additional
background discussion relating to this provision.
 
STOCKHOLDERS' MEETINGS
 
    Under the DGCL, special meetings of stockholders of a corporation may be
called by the corporation's board of directors or by such persons as may be
authorized by a corporation's certificate of incorporation or by-laws.
 
                                       49
<PAGE>
    The Diversified Holdings Certificate will provide that special meetings of
the stockholders may be called only by the Diversified Holdings Board, the
Chairman of the Board or the Chief Executive Officer and may not be called by
any other person or persons. Accordingly, stockholders of Diversified Holdings
may not call a special meeting of stockholders. The PKS Certificate is silent on
this matter. The PKS By-laws provide that special meetings of stockholders may
be called by the Chairman of the Board or at the request of a majority of the
PKS Board or a majority of the outstanding voting stock of PKS.
 
    This provision of the Diversified Holdings Certificate is intended to ensure
that the election of directors and other matters for stockholder consideration
will be voted on only at Diversified Holdings' annual meeting and that
Diversified Holdings will not be forced to incur the expense and distraction of
a special meeting unless the Diversified Holdings Board, the Chairman of the
Board or the Chief Executive Officer considers such a meeting to be in the best
interests of the stockholders and calls such a meeting. The PKS Board believes
that the Diversified Holdings Board is in the best position to determine those
issues which are properly the subject of a special meeting of stockholders.
Although this provision has the effect of precluding stockholder consideration
of a proposal over the opposition of the Diversified Holdings Board, the
Chairman of the Board or the Chief Executive Officer, the PKS Board believes
that stockholders are provided a full opportunity to make proper proposals at
duly convened stockholder meetings and to request that any such proposal be
presented for consideration to other stockholders in the Diversified Holdings'
annual proxy statement.
 
    See "--Reasons for the Corporate Governance Provisions" for additional
background discussion relating to this provision.
 
AMENDMENT OF BY-LAWS
 
    The Diversified Holdings Certificate will provide that the stockholders of
Diversified Holdings may not adopt, repeal, alter, amend or rescind the
Diversified Holdings By-laws except upon the affirmative vote of at least
two-thirds of the votes entitled to be cast by the holders of outstanding shares
of stock of Diversified Holdings. The DGCL vests such power solely in the
stockholders of a corporation unless such power is conferred upon the board of
directors in the certificate of incorporation. The PKS Certificate currently
provides that the PKS By-laws may be amended by the affirmative vote of
two-thirds of the PKS Board, or both (i) two-thirds of the outstanding Class C
Stock and (ii) a majority of the outstanding voting stock of PKS.
 
    The PKS Board believes that this provision will help to assure continuity
with respect to the management of the day-to-day operations of Diversified
Holdings. In addition, the provision will prevent a purchaser who acquires a
majority of the Diversified Holdings Stock from adopting by-laws which are not
in the best interest of all the stockholders or repealing by-laws which are in
such stockholders' interests.
 
    See "--Reasons for the Corporate Governance Provisions" for additional
background discussion relating to this provision.
 
REPURCHASE RIGHTS
 
    Currently, holders of Class D Stock may require PKS to purchase any or all
of the Class D Stock held by them by delivering the certificate or certificates
for such Class D Stock to PKS together with a written notice requesting
repurchase. PKS must pay for any repurchased Class D Stock within 60 days after
receipt of the certificates and written notice.
 
    The PKS Board may limit the obligation of PKS to repurchase Class D Stock
for cash after PKS has in any fiscal year purchased shares of Class D Stock
tendered to PKS in an amount equal to 10% of the number of shares of Class D
Stock outstanding at the end of the prior fiscal year (the "10% Threshold").
During a given fiscal year, until the 10% Threshold is reached PKS must
repurchase all shares of Class D Stock tendered. If the 10% Threshold is
reached, the PKS Board may elect to repurchase Class D Stock by delivering a
promissory note instead of cash. In setting the proportion of shares to be
purchased for cash, the PKS Board may set the proportion so that the cumulative
shares sold during the fiscal year is equal to
 
                                       50
<PAGE>
the 10% Threshold or the PKS Board may set some higher proportion. Under the PKS
Certificate, the promissory notes have a term to maturity not to exceed two
years.
 
    The Diversified Holdings Certificate will provide repurchase rights similar
to those provided with respect to Class D Stock under the PKS Certificate. Under
the Diversified Holdings Certificate, however, promissory notes issued after the
10% Threshold is reached in a given fiscal year may have such term to maturity,
up to ten years, as the Diversified Holdings Board may determine. This extension
of the potential terms of repurchase promissory notes is intended to provide the
Diversified Holdings Board with greater flexibility in responding to a
substantial call on its capital by stockholders seeking redemption. See "Risk
Factors Regarding Diversified Holdings After the Transaction--Modification of
Repurchase Obligation."
 
REASONS FOR THE CORPORATE GOVERNANCE PROVISIONS
 
    GENERAL.  Although it is not anticipated that Class D Stock will be listed
for trading on a stock exchange or market at the Effective Time, it is
anticipated that such a listing will be sought at such time that Diversified
Holdings determines to raise capital through a public equity offering or denies
to have a listed equity security available for acquisitions. See "Risk Factors
Regarding Diversified Holdings After the Transaction--Certain Limitations on
Changes in Control of Diversified Holdings" and "Comparison of Class D Stock and
Diversified Holdings Stock--Listing." If the Diversified Holdings Stock becomes
publicly traded, the Diversified Holdings Certificate provisions described under
"--Board of Directors", "--Stockholder Consent", "--Stockholders' Meetings" and
"--Amendment of By-laws" above (together, the "Corporate Governance Provisions")
would reduce the vulnerability of Diversified Holdings to an unsolicited
takeover proposal not deemed by the Diversified Holdings Board to be in the best
interests of the stockholders. As a result of the Transaction, Diversified
Holdings will not have Class C Stock. Accordingly, Diversified Holdings would no
longer have a class of capital stock which could be held only by certain
persons, and, if Diversified Holdings Stock was sold by its current holders,
Diversified Holdings could be subject to coercive takeover tactics which might
impede its long-term business prospects. The Corporate Governance Provisions are
proposed with a view toward better enabling Diversified Holdings to (i) develop
its business through long-range planning and to foster its long-term growth,
(ii) attempt to avoid the necessity of sacrificing these plans for the sake of
short-term gains and the disruptions caused by any threat of a takeover not
deemed by the Diversified Holdings Board to be in the best interests of
Diversified Holdings and its stockholders and (iii) allow the Diversified
Holdings Board to make a reasoned and unpressured evaluation in the event of an
unsolicited takeover proposal.
 
    In addition, these measures would discourage certain types of transactions,
which may involve an actual or threatened change of control of Diversified
Holdings. The measures are designed to make it more difficult and time-consuming
to change, among other things, majority control of the Diversified Holdings
Board and thus reduce the vulnerability of Diversified Holdings to an
unsolicited proposal for a takeover, particularly one that is made at an
inadequate price or does not contemplate the acquisition of all of the
Diversified Holdings capital stock, or an unsolicited proposal for the
restructuring or sale of all or part of Diversified Holdings. The PKS Board
believes that, as a general rule, such proposals would not be in the best
interest of Diversified Holdings and its stockholders. The Diversified Holdings
Board will always be bound by its fiduciary duties to act in the best interest
of Diversified Holdings and its stockholders.
 
    Historically, the accumulation of substantial stock positions in public
companies by third parties is sometimes a prelude to proposing a takeover or a
restructuring or sale of all or part of such companies or other similar
extraordinary corporate action or simply as a means to put such companies "in
play." Such actions are often undertaken by the third party without advance
notice to, or consultation with, the management of such companies. In many
cases, the purchaser seeks representation on the particular company's board of
directors in order to increase the likelihood that its proposal will be
implemented by the company. If the company resists the efforts of the purchaser
to obtain representation on the particular company's board, the purchaser may
commence a proxy contest to have its nominee elected to the board in place of
certain directors or the entire board. In a number of cases, the purchaser may
not truly be
 
                                       51
<PAGE>
interested in taking over the company, but uses the threat of a proxy fight
and/or a bid to take over the company as a means of forcing the company to
repurchase the purchaser's equity position at a substantial premium over the
existing market price or as a means to put the company into "play" solely to
reap short-term gains from his recent accumulation of stock.
 
    The PKS Board believes that the imminent threat of removal of management in
such situations would severely curtail management's ability to negotiate
effectively with such purchasers. In addition, the PKS Board believes that the
ability of a third party to put Diversified Holdings "in play" would severely
curtail management's ability to negotiate effectively with any other third party
interested in acquiring Diversified Holdings. Diversified Holdings' management
would be deprived of the time and information necessary to evaluate the takeover
proposal, to study alternative proposals and to help ensure that the best price
is obtained in any transaction involving Diversified Holdings which may
ultimately be undertaken. If the real purpose of a takeover bid were to force
Diversified Holdings to repurchase an accumulated stock interest at a premium
price, management would face the risk that, if it did not repurchase the
purchaser's stock interest, the Company's business and management would be
disrupted, perhaps irreparably.
 
    Given the unique capital structure of PKS and the closely held nature of
Class C Stock, the PKS Certificate does not contain provisions similar in
purpose and effect to the Corporate Governance Provisions. In the view of the
PKS Board, the relevant provisions of the Diversified Holdings Certificate which
PKS Stockholders are being asked to approve will help ensure that the
Diversified Holdings Board, if confronted by a proposal from a third party which
has acquired a block of Diversified Holdings' capital stock, will have
sufficient time to review the proposal and appropriate alternatives to the
proposal and to act in what it believes to be the best interests of its
stockholders.
 
    AMENDMENTS TO THE PKS BY-LAWS.  In addition to the Corporate Governance
Provisions, the PKS Board believes that certain amendments to the PKS By-laws
will further protect Diversified Holdings from an actual or threatened change of
control. In furtherance thereof, the PKS Board intends to approve the
Diversified Holdings By-laws, which will become effective upon the filing of the
Diversified Holdings Certificate with the Secretary of State of the State of
Delaware. The PKS By-laws can be amended by the PKS Board. As such, no action
need be taken by PKS Stockholders with respect to such amendments; the following
description of the amendments to the Diversified Holdings By-laws is being
furnished only to notify PKS Stockholders of the proposed adoption of such
amendments by the PKS Board.
 
    Diversified Holdings By-Laws will provide that any stockholder of record may
nominate one or more persons for election as director or directors at an annual
meeting or at any special meeting of stockholders called for the purpose of
electing directors only if written notice of such stockholder's intent to make
such nomination contains certain specified information and has been given to the
Secretary of Diversified Holdings within a specified time prior to the meeting.
In the case of an annual meeting of stockholders, the notice must be given not
less than 60 days nor more than 90 days prior to the anniversary date of the
immediately preceding annual meeting of stockholders; provided, however, that in
the event that the annual meeting is called for a date that is not within 30
days before or after such anniversary date, notice by the stockholder in order
to be timely must be received no later than the close of business on the tenth
day following the day on which such notice of the date of the annual meeting was
mailed or such public disclosure of the date of the annual meeting was made,
whichever first occurs. In the case of a special meeting of stockholders called
for the purpose of electing directors, the notice must be given not later than
the close of business on the tenth day following the day on which notice of the
date of the special meeting was mailed or public disclosure of the date of the
special meeting was made, whichever first occurs.
 
    Such stockholder's notice will be required to set forth as to each person
whom the stockholder proposes to nominate for election as a director (i) the
name, age, business address and residence address of the person, (ii) the
principal occupation or employment of the person, (iii) the class or series and
number of shares of capital stock of Diversified Holdings which are owned
beneficially or of record by the person and (iv) any other information relating
to the person that would be required to be disclosed in a proxy statement or
other filings required to be made in connection with solicitations of proxies
for election
 
                                       52
<PAGE>
of directors pursuant to Section 14 of the Exchange Act, and the rules and
regulations promulgated thereunder. In addition, such stockholder's notice must
set forth, as to the stockholder giving the notice (i) the name and record
address of such stockholder, (ii) the class or series and number of shares of
capital stock of Diversified Holdings which are owned beneficially or of record
by such stockholder, (iii) a description of all arrangements or understandings
between such stockholder and each proposed nominee and any other person
(including his name and address) pursuant to which the nomination(s) are to be
made by such stockholder, (iv) a representation that such stockholder intends to
appear in person or by proxy at the meeting to nominate the persons named in its
notice and (v) any other information relating to such stockholder that would be
required to be disclosed in a proxy statement or other filings required to be
made in connection with solicitations of proxies for election of directors
pursuant to Section 14 of the Exchange Act. Such notice must be accompanied by a
written consent of each proposed nominee to be named as a nominee and to serve
as a director if elected.
 
    The chairman of a meeting of the Diversified Holdings stockholders may
refuse to acknowledge the nomination of any person not made in compliance with
the foregoing procedures. Although the nomination provision does not give the
Diversified Holdings Board any power to approve or disapprove of stockholder
nominations for the election of directors, this provision may have the effect of
precluding a nomination for the election of directors at a particular annual
meeting if the proper procedures are not followed, and may discourage or deter a
third party from conducting a solicitation of proxies to elect its own slate of
directors or otherwise attempting to obtain control of Diversified Holdings,
even if such attempt might be beneficial to Diversified Holdings and its
stockholders.
 
    The Diversified Holdings By-Laws also will provide that certain requirements
must be satisfied for business to be properly introduced by a stockholder of
record of Diversified Holdings at an annual meeting of stockholders where such
business is not specified in the notice of meeting or brought by or at the
direction of the Board of Directors. In addition to any other applicable
requirements, such business may be introduced by such stockholder at such
meeting only if written notice thereof is given by such stockholder to the
Secretary of Diversified Holdings not less than 60 nor more than 90 days prior
to the anniversary date of the immediately preceding annual meeting of
stockholders; provided, however, that in the event that the annual meeting is
called for a date that is not within 30 days before or after such anniversary
date, notice by the stockholder in order to be timely must be received not later
than the close of business on the tenth day following the day on which such
notice of the date of the annual meeting was mailed or such public disclosure of
the date of the annual meeting was made, whichever first occurs.
 
    Such stockholder's notice will be required to set forth as to each matter
such stockholder proposes to bring before the annual meeting (i) a brief
description of the business desired to be brought before the annual meeting and
the reasons for conducting such business at the annual meeting, (ii) the name
and record address of such stockholder, (iii) the class or series and number of
shares of capital stock of Diversified Holdings which are owned beneficially or
of record by such stockholder, (iv) a description of all arrangements or
understandings between such stockholder and any other person (including his name
and address) in connection with the proposal of such business by such
stockholder and any material interest of such stockholder in such business and
(v) a representation that such stockholder intends to appear in person or by
proxy at the annual meeting to bring such business before the meeting.
 
    The stockholder proposal provision of the Diversified Holdings By-laws will
not preclude discussion by any stockholder of any business properly brought
before any meeting of stockholders. Under this provision, the chairman of the
annual meeting may, if the facts warrant, determine and declare that any
business was not properly brought before such meeting and such business will not
be transacted. Although this provision does not give the Diversified Holdings
Board or the chairman of the annual meeting any powers to approve or disapprove
such matters, the stockholder proposal provision may have the effect of
precluding the consideration of matters at a particular annual meeting if the
proper procedures are not followed, even if approval of such matters may be
deemed by some stockholders to be beneficial to Diversified Holdings and its
stockholders.
 
                                       53
<PAGE>
SECTION 203 OF THE DELAWARE GENERAL CORPORATION LAW
 
    Diversified Holdings is a Delaware corporation and subject to Section 203 of
the DGCL. Generally, Section 203 prohibits a publicly held Delaware corporation
from engaging in a "business combination" with an "interested stockholder" for a
period of three years after the time such stockholder becomes an interested
stockholder, unless (i) prior to such time, the board of directors of the
corporation approved either the business combination or the transaction which
resulted in the stockholder becoming an interested stockholder, (ii) upon
consummation of the transaction which resulted in the stockholder becoming an
interested stockholder, the interested stockholder owned at least 85% of the
voting stock of the corporation outstanding at the time the transaction
commenced, or (iii) at or subsequent to such time, the business combination is
approved by the board of directors and authorized by the affirmative vote of at
least 66 2/3% of the outstanding voting stock that is not owned by the
interested stockholder. A "business combination" includes (a) any merger or
consolidation of the corporation with the interested stockholder, (b) any sale,
lease, exchange or other disposition, except proportionately as a stockholder of
such corporation, to or with the interested stockholder of assets of the
corporation having an aggregate market value equal to 10% or more of either the
aggregate market value of all the assets of the corporation or the aggregate
market value of all the outstanding stock of the corporation, (c) certain
transactions resulting in the issuance or transfer by the corporation of stock
of the corporation to the interested stockholder, (d) certain transactions
involving the corporation which have the effect of increasing the proportionate
share of the stock of any class or series of the corporation which is owned by
the interested stockholder or (e) certain transactions in which the interested
stockholder receives financial benefits provided by the corporation. An
"interested stockholder" generally is (i) any person that owns 15% or more of
the outstanding voting stock of the corporation, (ii) any person that is an
affiliate or associate of the corporation and was the owner of 15% or more of
the outstanding voting stock of the corporation at any time within the
three-year period prior to the date on which it is sought to be determined
whether such person is an interested stockholder and (iii) the affiliates or
associates of any such person.
 
DIVERSIFIED HOLDINGS RIGHTS PLAN
 
    It is anticipated that the Diversified Holdings Board will adopt the
Diversified Holdings Rights Plan and in connection therewith enter into the
Diversified Holdings Rights Agreement. The following description of the
Diversified Holdings Rights Plan is being furnished only to notify PKS
Stockholders of the anticipated adoption of such plan by the Diversified
Holdings Board. The Diversified Holdings Rights Plan will have certain
anti-takeover effects. To implement the Diversified Holdings Rights Plan, the
Diversified Holdings Board will authorize the issuance of one right (a
"Diversified Holdings Right") for each share of Diversified Holdings Stock
outstanding as of a certain date and issued thereafter until the Distribution
Date (as defined in the Diversified Holdings Rights Agreement). Each Diversified
Holdings Right will entitle the holder to purchase from Diversified Holdings one
one-thousandth of a share of a series of preferred stock to be designated by the
Diversified Holdings Board (the "Rights Plan Preferred Stock") at a specified
initial purchase price that will be subject to adjustment. The Diversified
Holdings Rights expire on the tenth anniversary of its adoption, unless extended
or earlier redeemed by Diversified Holdings. The Diversified Holdings Rights
will cause substantial dilution to a person or group that attempts to acquire,
or merge with, Diversified Holdings without conditioning the offer on the
Diversified Holdings Rights being rendered inapplicable.
 
    The Diversified Holdings Rights will separate from the Diversified Holdings
Stock and a Distribution Date will occur upon the earlier of ten days following
public disclosure that certain persons or groups of persons have become a
beneficial owner of 15% or more of the outstanding Diversified Holdings Stock
(an "Acquiring Person") or ten business days following the commencement of a
tender offer or exchange offer that would result in certain persons or groups
becoming an Acquiring Person. Upon the occurrence of a Distribution Date, each
holder of a Diversified Holdings Right will have the right to receive, upon
exercise of the right, Diversified Holdings Stock having a value equal to two
times the exercise price of the
 
                                       54
<PAGE>
Diversified Holdings Right, except that all Diversified Holdings Rights held by
an Acquiring Person become null and void.
 
    In the event that a person becomes an Acquiring Person and Diversified
Holdings is acquired in a merger or other business combination in which
Diversified Holdings is not the surviving corporation, or more than 50% of the
assets or earning power of Diversified Holdings' assets are sold or transferred,
each holder, except for Acquiring Persons, of a Diversified Holdings Right will
have the right to receive, upon exercise, common stock of the acquiring company
which has a value equal to two times the exercise price of a Diversified
Holdings Right.
 
    The Rights Plan Preferred Stock will be nonredeemable, and subordinate to
all other series of Diversified Holdings preferred stock. The liquidation
preference of each share of Rights Plan Preferred Stock will be an amount equal
to (i) 1,000 times the aggregate amount to be distributed per share to holders
of Diversified Holdings Stock and (ii) after the payments set forth in (i), a
ratable and proportionate share with the holders of Diversified Holdings Stock
of the remaining assets to be distributed. Each share of Rights Plan Preferred
Stock will be entitled to receive, when, as and if declared, a quarterly
dividend at the rate equal to 1,000 times the aggregate per share amount of all
cash dividends and 1,000 times the aggregate per share amount of all non-cash
dividends or other distributions (payable in kind) (other than a dividend
payable in Diversified Holdings equity securities). Each share of Rights Plan
Preferred Stock will have 1,000 votes, subject to adjustment, voting together
with the Diversified Holdings Stock and not as a separate class. If Diversified
Holdings enters into any consolidation, merger, combination or other transaction
in which the shares of Diversified Holdings Stock are exchanged, each share of
Rights Plan Preferred Stock will be entitled to receive 1,000 times the amount
received per share of Diversified Holdings Stock. The right of the Rights Plan
Preferred Stock as to dividends, voting right and liquidation are protected by
antidilution provisions.
 
    Diversified Holdings may redeem the Diversified Holdings Rights in whole,
but not in part, at any time until ten days following the date on which there
has been public disclosure that, or facts indicating that, a person has become
an Acquiring Person at a price (the "Redemption Price") of $.01 per Diversified
Holdings Right (or such other consideration deemed appropriate by the
Diversified Holdings Board) by resolution of the Diversified Holdings Board,
subject to certain exceptions. The redemption of the Diversified Holdings Rights
may be made effective at such time on such basis with such conditions as the
Diversified Holdings Board in its sole discretion may establish. The Diversified
Holdings Rights will terminate immediately upon the action of the Diversified
Holdings Board ordering redemption of the Diversified Holdings Rights and
thereafter the holders of Diversified Holdings Rights will only be able to
receive the Redemption Price.
 
    Other than provisions relating to the principal economic terms of the
Diversified Holdings Rights, the Diversified Holdings Rights Agreement may be
amended by resolution of the Diversified Holdings Board, subject to certain
exceptions, prior to the Distribution Date. After the Distribution Date, the
Diversified Holdings Rights Agreement may be amended by resolution of the
Diversified Holdings Board, subject to certain exceptions, in order to cure any
ambiguity, to make changes which do not adversely affect the interests of
holders of Diversified Holdings Rights (excluding the interests of any Acquiring
Person or its affiliates or associates), or to shorten or lengthen any time
period under the Diversified Holdings Rights Agreement; provided, however, that
no amendment to adjust the time period governing redemption may be made at such
time as the Diversified Holdings Rights are not redeemable.
 
                                       55
<PAGE>
              SELECTED HISTORICAL AND PRO FORMA FINANCIAL DATA OF
              PETER KIEWIT SONS', INC. AND THE CONSTRUCTION GROUP
 
    The following selected historical and pro forma financial data of PKS and
the Construction Group should be read in conjunction with the PKS and the
Construction Group historical financial statements and the notes thereto and the
pro forma financial information and the notes thereto included elsewhere herein
or incorporated herein by reference.
 
    The selected historical financial data for each of the years in the period
1992 to 1996 and as of the end of each such year have been derived from audited
financial statements. The selected historical financial data for the six months
ended June 30, 1996 and 1997, and as of June 30, 1997, have been derived from
unaudited financial statements. In the opinion of management, such unaudited
financial statements reflect all adjustments consisting only of normal recurring
accruals, necessary to present fairly the financial position of PKS and the
Construction Group at June 30, 1997 and the results of operations for the six
months ended June 30, 1996 and 1997. The results of operations for the six
months ended June 30, 1997 are not necessarily indicative of the results that
may be expected for the entire 1997 fiscal year.
 
    The pro forma results of operations data for the six months ended June 30,
1997 of PKS and the Construction Group, respectively, assume that the
Transaction is consummated on December 29, 1996. The pro forma results of
operations data for the year ended December 28, 1996 of PKS and the Construction
Group, respectively, assume that the Transaction is consummated on December 31,
1995. The pro forma financial position data of PKS and the Construction Group as
of June 30, 1997 assume that such transactions were consummated as of such date.
The pro forma information assumes, in two separate scenarios, that 1,500,000
shares (Scenario 1) and 3,000,000 shares (Scenario 2) of Class C Stock will be
converted in the 1997 Conversion Period.
 
    The pro forma financial information is not intended to reflect the results
of operations or the financial position of PKS and the Construction Group which
actually would have resulted had the Transaction been effective on the dates
indicated. Moreover, the pro forma information is not intended to be indicative
of future results of operations or financial position of PKS or the Construction
Group.
 
                                       56
<PAGE>
              SELECTED HISTORICAL AND PRO FORMA FINANCIAL DATA OF
                            PETER KIEWIT SONS', INC.
 
  (To be renamed Diversified Holdings, Inc. following the consummation of the
                                  Transaction)
<TABLE>
<CAPTION>
                                                                                                                      PRO
                                                                     HISTORICAL                                   FORMA(1)(2)(3)
                                     ---------------------------------------------------------------------------  -----------
<S>                                  <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
                                                                                                                  FISCAL YEAR
                                                                                                 SIX MONTHS          ENDED
                                                                                                   ENDED           DECEMBER
                                                       FISCAL YEAR ENDED                          JUNE 30,         28, 1996
                                     -----------------------------------------------------  --------------------  -----------
 
<CAPTION>
                                                                                                                   SCENARIO
                                       1992       1993       1994       1995       1996       1996       1997          1
- -----------------------------------  ---------  ---------  ---------  ---------  ---------  ---------  ---------  -----------
                                                         (DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
<S>                                  <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
RESULTS OF OPERATIONS:
  Revenue (4)(5)...................  $   1,918  $   2,050  $   2,700  $   2,867  $   2,904  $   1,363  $   1,381   $     285
  Earnings before cumulative effect
    of change in accounting
    principle(6)...................        162        261        110        244        221         71         91         114
  Net earnings(6)..................        181        261        110        244        221         71         91         114
FINANCIAL POSITION:
Total assets(4)(5).................  $   2,549  $   3,634  $   4,504  $   3,451  $   3,548             $   3,805
  Current portion of long-term
    debt(4)(5)(7)..................          3         15         33         42         57                    14
  Long-term debt, less current
    portion(4)(5)(7)...............         30        462        908        370        332                   393
  Stockholders' equity(8)..........      1,458      1,671      1,736      1,607      1,819                 1,926
PER COMMON SHARE:
  Net Earnings:
    Class C Stock:
      Primary......................  $    4.48  $    4.63  $    4.92  $    7.78  $   10.13  $    3.46  $    5.34
      Fully diluted................       4.46       4.59       4.86       7.62       9.82       3.36       5.13
    Class D Stock:
      Primary......................       3.95       9.08       1.63       6.45       4.85       1.54       1.67   $    4.07
      Fully diluted................       3.94       9.06       1.63       6.44       4.85       1.54       1.67        4.06
  Dividends(9):
    Class C Stock..................       0.70       0.70       0.90       1.05       1.30       0.60       0.70
    Class D Stock..................       1.95       0.50     --           0.50       0.50     --         --
  Stock Price (4)(10):
    Class C Stock..................      18.70      22.35      25.55      32.40      40.70      31.80      40.00
    Class D Stock..................      50.65      59.40      60.25      49.50      54.25      49.50      54.25
  Book Value:
    Class C Stock..................      23.31      27.43      31.39      42.90      51.02      45.34      55.38
    Class D Stock..................      50.75      59.52      60.36      49.49      54.23      54.22      55.62
 
<CAPTION>
 
<S>                                  <C>          <C>          <C>
 
                                                      SIX MONTHS ENDED
 
                                                       JUNE 30, 1997
                                                  ------------------------
                                      SCENARIO     SCENARIO     SCENARIO
                                          2            1            2
- -----------------------------------  -----------  -----------  -----------
 
<S>                                  <C>          <C>          <C>
RESULTS OF OPERATIONS:
  Revenue (4)(5)...................   $     285    $     161    $     161
  Earnings before cumulative effect
    of change in accounting
    principle(6)...................         116           42           43
  Net earnings(6)..................         116           42           43
FINANCIAL POSITION:
Total assets(4)(5).................                $   2,115    $   2,175
  Current portion of long-term
    debt(4)(5)(7)..................                        1            1
  Long-term debt, less current
    portion(4)(5)(7)...............                      133          133
  Stockholders' equity(8)..........                    1,480        1,540
PER COMMON SHARE:
  Net Earnings:
    Class C Stock:
      Primary......................
      Fully diluted................
    Class D Stock:
      Primary......................   $    4.04    $    1.43    $    1.43
      Fully diluted................        4.03         1.43         1.43
  Dividends(9):
    Class C Stock..................
    Class D Stock..................
  Stock Price (4)(10):
    Class C Stock..................
    Class D Stock..................                    54.90        54.90
  Book Value:
    Class C Stock..................
    Class D Stock..................                    54.92        54.89
</TABLE>
 
- ------------------------
 
(1) The pro forma results of operations data are computed assuming that the
    Transaction is consummated on December 31, 1995 and December 29, 1996 for
    the fiscal year ended December 28, 1996 and six months ended June 30, 1997,
    respectively. The pro forma financial position data as of June 30, 1997
    assumes that the Transaction was consummated as of such date. The pro forma
    financial data of PKS should be read in conjunction with PKS' historical
    consolidated financial statements and the notes thereto and the "Pro Forma
    Financial Information" included elsewhere herein or incorporated by
    reference.
 
(2) The pro forma information assumes, in two separate scenarios, that 1,500,000
    shares (Scenario 1) and that 3,000,000 shares (Scenario 2) of Class C Stock
    will be converted in the 1997 Conversion Period.
 
(3) The PKS Board approved the Transaction at a special meeting held on August
    14, 1997. The pro forma results of operations, financial position and per
    common share data assume the earnings statement and balance sheet accounts
    of the Construction Group have been removed as a result of the Transaction.
    In addition, the operating results and financial position of C-TEC have been
    reflected as an equity method investment in the pro forma data due to
    C-TEC's pending reorganization which will reduce PKS' voting interest below
    fifty percent.
 
(4) In September 1995, PKS dividended its investment in MFS to Class D
    Stockholders. MFS' results of operations have been classified as a single
    line item on the statements of earnings through 1995. MFS is consolidated in
    the 1992-1994 balance sheets.
 
                                       57
<PAGE>
              SELECTED HISTORICAL AND PRO FORMA FINANCIAL DATA OF
                            PETER KIEWIT SONS', INC.
 
  (To be renamed Diversified Holdings, Inc. following the consummation of the
                                  Transaction)
 
(5) In October 1993, PKS acquired 35% of the outstanding shares of C-TEC that
    had 57% of the available voting rights. At June 30, 1997, PKS owned 48.5% of
    the outstanding shares and 63.6% of the voting rights.
 
(6) In 1993, through two public offerings, PKS sold 29% of MFS, resulting in a
    $137 million after-tax gain. In 1994 and 1995, additional MFS stock
    transactions resulted in $35 million and $2 million after-tax gains to PKS
    and reduced its ownership in MFS to 67% and 66%.
 
(7) In January 1994, MFS issued $500 million of 9.375% Senior Discount Notes.
 
(8) The aggregate redemption value of the Class C Stock and Class D Stock at
    June 30, 1997 was $404 million and $1,333 million, respectively.
 
(9) The 1992, 1993, 1994, 1995 and 1996 Class C Stock dividends include $.30,
    $.40, $.45, $.60 and $.70 per share dividends declared in 1992, 1993, 1994,
    1995 and 1996, respectively, but paid in January of the subsequent year. The
    1992, 1995 and 1996 Class D Stock dividends include $.50 per share dividends
    declared in 1992, 1995 and 1996 but paid in January of the subsequent year.
    Pro forma dividends have not been presented as the amount of any dividends
    that may have been declared if the Transaction had occurred as of the
    beginning of the respective periods cannot be determined.
 
(10) Pursuant to the PKS Certificate, the stock price calculation of a share of
    Class C Stock and Class D Stock is computed annually at the end of the
    fiscal year, except that adjustments to the stock price to reflect dividends
    are made at the time such dividends are declared.
 
                                       58
<PAGE>
              SELECTED HISTORICAL AND PRO FORMA FINANCIAL DATA OF
                             THE CONSTRUCTION GROUP
(To be operated by PKS Holdings, Inc. which will be renamed "Peter Kiewit Sons',
                                     Inc."
                 following the consummation of the Transaction)
<TABLE>
<CAPTION>
                                                           HISTORICAL                                       PRO FORMA(1)(2)
                           ---------------------------------------------------------------------------  ------------------------
<S>                        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>          <C>
                                                                                       SIX MONTHS
                                                                                         ENDED             FISCAL YEAR ENDED
                                             FISCAL YEAR ENDED                          JUNE 30,           DECEMBER 28, 1996
                           -----------------------------------------------------  --------------------  ------------------------
 
<CAPTION>
                                                                                                         SCENARIO     SCENARIO
                             1992       1993       1994       1995       1996       1996       1997          1            2
                           ---------  ---------  ---------  ---------  ---------  ---------  ---------  -----------  -----------
                                                      (DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
<S>                        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>          <C>
RESULTS OF OPERATIONS:
  Revenue................  $   1,675  $   1,783  $   2,175  $   2,330  $   2,286  $   1,072  $   1,047   $   2,286    $   2,286
  Earnings before
    cumulative effect of
    change in accounting
    principle............         69         80         77        104        108         36         50         107          105
  Net earnings...........         82         80         77        104        108         36         50         107          105
FINANCIAL POSITION:
  Total assets...........  $     862  $     889  $     963  $     977  $   1,036             $   1,117
  Current portion of
    long-term debt.......          2          4          3          2     --                         2
  Long-term debt, less
    current portion......         12         10          9          9         12                    16
  Stockholders'
  equity(3)..............        437        480        505        467        562                   559
PER COMMON SHARE:
  Net Earnings:
    Primary..............  $    4.48  $    4.63  $    4.92  $    7.78  $   10.13  $    3.46  $    5.34   $   11.21    $   13.12
    Fully diluted........       4.46       4.59       4.86       7.62       9.82       3.36       5.13       11.21        13.12
  Dividends(4)...........       0.70       0.70       0.90       1.05       1.30       0.60       0.70
  Stock price(5).........      18.70      22.35      25.55      32.40      40.70      31.80      40.00
  Book value.............      23.31      27.43      31.39      42.90      51.02      45.34      55.38
 
<CAPTION>
 
<S>                        <C>          <C>
 
                               SIX MONTHS ENDED
                                JUNE 30, 1997
                           ------------------------
                            SCENARIO     SCENARIO
                                1            2
                           -----------  -----------
 
<S>                        <C>          <C>
RESULTS OF OPERATIONS:
  Revenue................   $   1,047    $   1,047
  Earnings before
    cumulative effect of
    change in accounting
    principle............          49           48
  Net earnings...........          49           48
FINANCIAL POSITION:
  Total assets...........   $   1,056    $     996
  Current portion of
    long-term debt.......           2            2
  Long-term debt, less
    current portion......           6            6
  Stockholders'
  equity(3)..............         505          445
PER COMMON SHARE:
  Net Earnings:
    Primary..............   $    5.92    $    7.10
    Fully diluted........        5.92         7.10
  Dividends(4)...........
  Stock price(5).........       42.50        43.00
  Book value.............       55.92        59.09
</TABLE>
 
- ------------------------------
 
(1) The pro forma results of operations data are computed assuming that the
    Transaction was consummated on December 31, 1995 and December 29, 1996 for
    the fiscal year ended December 28, 1996 and six months ended June 30, 1997
    respectively. The pro forma financial position data as of June 30, 1997
    assume that the Transaction was consummated as of such date. The pro forma
    financial data of the Construction Group should be read in conjunction with
    the Construction Group's historical financial statements and the notes
    thereto and the "Pro Forma Financial Information" included elsewhere herein.
 
(2) The pro forma information assumes, in two separate scenarios, that 1,500,000
    shares (Scenario 1) and 3,000,000 shares (Scenario 2) of Class C Stock will
    be converted in the 1997 Conversion Period.
 
(3) Ownership of the Class C Stock is restricted to certain employees
    conditioned upon the execution of repurchase agreements which restrict the
    employees from transferring the stock. PKS is generally committed to
    purchase all Class C Stock at the price determined, when put to PKS by a
    stockholder, pursuant to the PKS Certificate. The aggregate redemption value
    of the Class C Stock at June 30, 1997 was $404 million.
 
(4) The 1992, 1993, 1994, 1995 and 1996 Class C Stock dividends include $.30,
    $.40, $.45, $.60 and $.70 per share dividends declared in 1992, 1993, 1994,
    1995 and 1996, respectively, but paid in January of the subsequent year. Pro
    forma dividends have not been presented as the amount of any dividends that
    may have been declared if the Transaction occurred as of the beginning of
    the respective periods cannot be determined.
 
(5) Pursuant to the PKS Certificate, the stock price calculation of a share of
    Class C Stock is computed annually at the end of the fiscal year, except
    that adjustments to the stock price to reflect dividends are made at the
    time such dividends are declared.
 
                                       59
<PAGE>
        MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
                RESULTS OF OPERATIONS OF THE CONSTRUCTION GROUP
 
    THE FOLLOWING DISCUSSION AND ANALYSIS SHOULD BE READ IN CONJUNCTION WITH THE
HISTORICAL AND PRO FORMA CONSOLIDATED FINANCIAL STATEMENTS AND NOTES THERETO AND
THE OTHER FINANCIAL INFORMATION INCLUDED ELSEWHERE IN THIS PROXY STATEMENT/JOINT
PROSPECTUS.
 
RESULTS OF OPERATIONS
 
COMPARISON OF SIX MONTHS ENDED JUNE 30, 1997 TO SIX MONTHS ENDED JUNE 30, 1996
 
    CONSTRUCTION.  The Construction Group's operations can be separated into two
components: construction and materials. The Construction Group's total revenue
for the six months ended June 30, 1997 decreased $25 million or 2% compared to
the same period in 1996. Revenue for the construction business decreased 4% to
$918 million compared to $961 million in 1996. This decrease was due to several
large projects being in the start-up phase and the substantial completion of the
San Joaquin toll road project at the end of 1996. Although construction revenue
was down, materials revenue increased 14% due to the strong demand for
aggregates in the Arizona market.
 
    Contract backlog at June 30, 1997 was $3.5 billion of which 4% is
attributable to foreign operations located in Canada and Indonesia. Domestic
projects are spread geographically throughout the United States. Included in
backlog is $755 million for the "I-15" project awarded in late March 1997.
Kiewit is the sponsoring partner on the design-build joint venture
reconstructing 16 miles of Interstate 15 through the Salt Lake City area. The
project is expected to be completed in 2001.
 
    Margins on construction projects for the first six months of 1997 increased
to 10% compared to 8% for the same period in 1996. Claim settlements received in
the first quarter of 1997 and the recognition of additional revenue from the San
Joaquin toll road were the primary factors contributing to the increase.
Materials margins in the first six months of 1997, as a percentage of revenue,
were unchanged from the same period in 1996.
 
    GENERAL AND ADMINISTRATIVE EXPENSES.  General and administrative expenses
increased 8% in the first six months of 1997 compared to the same period of
1996. The increase was attributable to higher compensation, travel and
professional services expenses.
 
    INTEREST EXPENSE, NET.  The repayment of short term borrowings in the first
and second quarter of 1996 was responsible for the reduction of interest expense
in the first six months of 1997 compared to the same period of 1996.
 
    OTHER, NET.  The 21% increase in other income in the first six months of
1997 compared to the same period of 1996 was attributable to higher mine
management fee income and increased gains on the disposition of construction
equipment.
 
    PROVISION FOR INCOME TAXES.  The effective income tax rates for the first
six months of 1997 and 1996 differed from the expected statutory rate of 35%
primarily due to state income taxes.
 
COMPARISON OF FISCAL YEAR ENDED DECEMBER 28, 1996 TO FISCAL YEAR ENDED DECEMBER
  30, 1995
 
    CONSTRUCTION.  The Construction Group's operations can be separated into two
components; construction and materials. Revenue from construction decreased 2%
to $2,060 million in 1996. This resulted from the completion of several major
projects during the year, while many new contracts were still in the start-up
phase. The Construction Group's share of joint venture revenue remained at 30%
of total revenues in 1996. Contract backlog at December 28, 1996 was $2.3
billion, of which 4% is attributable to foreign operations, principally in
Canada and the Philippines. Projects on the west coast of the United States
account for 42% of the total backlog. Revenue from materials increased by less
than 1% in 1996.
 
                                       60
<PAGE>
Increased demand for aggregates in the Arizona market was offset by a decline in
precious metal sales. The Construction Group sold its gold and silver operations
in Nevada to Kinross Gold Corporation ("Kinross") and essentially liquidated its
metals inventory in 1995.
 
    Opportunities in the construction and materials industry continued to expand
along with the economy during 1996. Because of the increased opportunities, the
Construction Group was able to be selective in the construction projects it
pursued. Gross margins for construction increased from 8% in 1995 to 10% in
1996. This resulted from the completion of several large projects and increased
efficiencies in all aspects of the construction process. Gross margins for
materials declined from 13% in 1995 to 10% in 1996. The lack of higher margin
precious metals sales in 1996 combined with slightly lower construction
materials margins produced the reduction in operating margin.
 
    GENERAL AND ADMINISTRATIVE EXPENSES.  General and administrative expenses
increased 1% for 1996 compared to 1995. Increases in compensation and travel
expenses were partially offset by lower insurance, computer operations and other
administrative expenses.
 
    INVESTMENT INCOME.  Investment income increased 24% in 1996 compared to
1995. The increase was primarily due to ME Holding Inc.'s equity earnings
increasing from $2 million in 1995 to $4 million in 1996 and due to $2 million
of investment income from other equity investments. Partially offsetting this
increase was a slight decline in interest income, due to a decrease in the
average cash balance during the year.
 
    INTEREST EXPENSE.  The increase in interest expense of $2 million in 1996
compared with 1995 was primarily attributable to the short-term borrowings
outstanding during the year.
 
    OTHER, NET.  In 1995, the exchange of the Construction Group's gold and
silver operations in Nevada for 4,000,000 shares of common stock of Kinross led
to a $21 million gain for the Construction Group. The gain was the difference
between the Construction Group's book value in the gold and silver operations
and the market value of the Kinross shares at the time of the exchange. Other
income was also primarily comprised of mine management fees, of $37 million and
$30 million in 1996 and 1995, respectively, and gains on the disposition of
property, plant and equipment and other assets of $17 million and $12 million in
1996 and 1995, respectively.
 
    PROVISION FOR INCOME TAXES.  The effective income tax rate for 1996 differed
from the statutory rate of 35% primarily because of adjustments to prior year
tax provisions and state taxes. In 1995, the rate was higher than 35% due
primarily to state income taxes.
 
COMPARISON OF FISCAL YEAR ENDED DECEMBER 30, 1995 TO FISCAL YEAR ENDED DECEMBER
  31, 1994
 
    CONSTRUCTION.  Revenue for the Construction Group increased $155 million, or
7%, to $2,330 million in 1995 compared to 1994. Revenue for the construction and
materials components increased 6% and 21%, respectively, in 1995 compared to
1994. The improvement in the Construction Group's construction revenue was
attributable to a 32% increase in joint venture revenue, which comprised 30% of
the total revenue in 1995 compared to 24% in 1994. The San Joaquin Toll Road
Joint Venture ("San Joaquin") in southern California contributed $225 million
and $111 to revenue in 1995 and 1994. Contract backlog at December 30, 1995 was
$2 billion, of which 10% was attributable to foreign operations, principally in
Canada and the Philippines. Projects on the west coast of the United States
accounted for 36% of the total backlog, including San Joaquin backlog of $133
million. The inclusion of two additional months of materials revenue generated
by APAC-Arizona ("APAC") companies, which were acquired on February 28, 1994,
was the primary factor resulting in the increased materials revenue.
 
    Gross margins for the Construction Group increased 13% in 1995. The
construction and materials components each produced similar results.
Construction's increased revenue, primarily from joint ventures, increased
operational efficiencies and substantial claim settlements all contributed to
improved results. The materials segment benefited from the robust demand for
construction materials in Arizona
 
                                       61
<PAGE>
and also from the operational efficiencies generated by the merger of APAC with
the Construction Group's existing materials business in Arizona. Also
contributing to the higher margins was the liquidation of the Construction
Group's precious metal inventory in 1995.
 
    GENERAL AND ADMINISTRATIVE EXPENSES.  General and administrative expenses
decreased 4% in 1995 compared to 1994. Declines in payroll, computer operations
and depreciation expense were partially offset by higher insurance and
professional service fees.
 
    INVESTMENT INCOME.  Slight improvements in interest income, earnings from
equity investments and reduced losses on the sale of securities contributed to
the increase in investment income in 1995 compared to 1994.
 
    OTHER, NET.  In 1995, the exchange of the Construction Group's gold and
silver operations for Kinross common stock led to a $21 million gain for the
Construction Group. Other income was also primarily comprised of mine management
fees, $30 million and $29 million in 1995 and 1994, respectively, and gains on
the disposition of property, plant and equipment and other assets of $12 million
and $13 million in 1995 and 1994, respectively.
 
    PROVISION FOR INCOME TAXES.  The effective income tax rate for 1995 differed
from the statutory rate of 35% due primarily to state income taxes. In 1994, the
rate approximated the federal statutory rate.
 
LIQUIDITY AND CAPITAL RESOURCES
 
    The Construction Group's working capital decreased $43 million or 12% during
the first six months of 1997. The decrease was primarily due to capital
expenditures of $62 million, investments and acquisitions of $18 million, the
exchange and repurchase of Class B Stock and Class C Stock totaling $73 million,
dividend payments of $13 million and $37 million of cash used in operating
activities. Partially offsetting these uses were the issuance of Class C Stock
totaling $34 million, net proceeds from the sale of marketable securities of $22
million, proceeds from the sale of property, plant and equipment and other
assets of $25 million and $2 million of debt borrowings.
 
    The Construction Group typically anticipates investing between $40 and $75
million annually in its construction business, including opportunities to
acquire additional businesses. On July 1, 1997, the Construction Group paid $4
million to increase its ownership in ME Holding Inc. to 80%. Other long term
liquidity uses include the payment of income taxes, repurchases and conversions
of common stock and the payment of dividends. The Construction Group's current
financial condition and borrowing capacity together with anticipated cash flows
from operations should be sufficient for immediate cash requirements and future
investing activities.
 
    The Construction Group will transfer funds to the Diversified Group in an
amount equal to the aggregate Class C Per Share Price of the Class C Stock
converted into Class D Stock during the 1997 Conversion Period. For example, if
1,500,000 shares of Class C Stock were converted into Class D Stock during the
1997 Conversion Period, PKS would transfer $72,000,000 from the Construction
Group to the Diversified Group; if 3,000,000 shares of Class C Stock were
converted into Class D Stock during the 1997 Conversion Period, PKS would
transfer $144,000,000 from the Construction Group to the Diversified Group
(calculated in each case assuming a year end 1997 Class C Per Share Price of
$48.00). The Construction Group will be required to borrow all or a portion of
the funds necessary to fund this transfer. The degree to which the Construction
Group is required to borrow such funds could, under certain circumstances, limit
its financial and operating flexibility.
 
                                       62
<PAGE>
                 PKS HOLDINGS DIRECTORS AND EXECUTIVE OFFICERS
 
    The following table sets forth certain information with respect to the
persons currently anticipated to be executive officers and directors of PKS
Holdings after consummation of the Transaction.
 
<TABLE>
<CAPTION>
NAME                                                  BUSINESS EXPERIENCE                                  AGE
- ------------------------  ---------------------------------------------------------------------------     -----
<S>                       <C>                                                                          <C>
Walter Scott, Jr.         Chairman of the Board and President, PKS; also a director of Berkshire               66
                          Hathaway Inc., Burlington Resources Inc., CalEnergy, ConAgra, Inc., C-TEC,
                          U.S. Bancorp and Valmont Industries, Inc.
 
Kenneth E. Stinson*       Executive Vice President, PKS; Chairman (since 1993) and CEO (since 1992),           55
                          KCG; also a director of ConAgra, Inc. and Valmont Industries, Inc.
 
Richard Geary*            Executive Vice President, KCG; President of Kiewit Pacific Co.                       62
 
Bruce E. Grewcock*        Executive Vice President, KCG (since 1996); Chairman (since 1996),                   43
                          President (1992-1996) and Sr. Vice President of Kiewit Mining Group, Inc.
                          (1992); also a director of Kinross Gold Corporation
 
George B. Toll, Jr.*      Executive Vice President, KCG (since 1994); Vice President, Kiewit Pacific           61
                          Co. (1992-1994)
 
Richard W. Colf*          Vice President, Kiewit Pacific Co.                                                   54
 
Tait P. Johnson*          President Gilbert Industrial Corporation, a PKS subsidiary; President                48
                          (1992-1996), Gilbert Southern Corp., a PKS subsidiary
 
Allan K. Kirkwood*        Vice President, Kiewit Pacific Co.                                                   54
 
Thomas C. Stortz*         Vice President and General Counsel, KCG                                              46
 
William L. Grewcock       Vice Chairman, PKS                                                                   72
 
James Q. Crowe            President and Chief Executive Officer, KDG (since August 1, 1997); Chairman          48
                          of the Board, WorldCom, Inc. (January 1997-July 1997); Chairman of the
                          Board, MFS (1992-1996) (MFS was a PKS subsidiary until 1995); also a
                          director of CalEnergy, C-TEC, Qwest Communications International, Inc. and
                          InaCom Corp.
 
Peter Kiewit, Jr.         Attorney, of counsel to the law firm of Gallagher & Kennedy of Phoenix,              71
                          Arizona
</TABLE>
 
    Identified by asterisks are the eight persons expected to be executive
officers of PKS Holdings after the consummation of the Transaction. Each such
person is expected to serve as an executive officer of PKS Holdings in a
capacity similar to that in which he currently serves at KCG or a KCG
subsidiary. Executive officers are those directors who will be employed by PKS
Holdings or its subsidiaries. Bruce E. Grewcock is the son of William L.
Grewcock.
 
    The PKS Holdings Board will have an Audit Committee, a Compensation
Committee and an Executive Committee.
 
    The Audit Committee members are expected to be Messrs. Johnson (Chairman),
Kirkwood and Kiewit. The functions of the Audit Committee will be to recommend
the selection of the independent auditors; review the results of the annual
audit; inquire into important internal control, accounting and financial
matters; and report and make recommendations to the full PKS Holdings Board.
 
    The Compensation Committee members are expected to be Messrs. Crowe and
Kiewit, neither of whom is an employee of PKS Holdings. This committee will
review the compensation of PKS Holdings
 
                                       63
<PAGE>
executive officers as well as the compensation, securities ownership and
benefits of PKS Holdings employees.
 
    The Executive Committee members are expected to be Messrs. Stinson
(Chairman), Geary, Bruce Grewcock and Toll. The committee will exercise the
powers of the PKS Holdings Board between board meetings, except powers assigned
to other committees.
 
                                       64
<PAGE>
             DIVERSIFIED HOLDINGS DIRECTORS AND EXECUTIVE OFFICERS
 
    The following table sets forth certain information with respect to the
persons currently anticipated to be executive officers and directors of
Diversified Holdings after consummation of the Transaction:
 
<TABLE>
<CAPTION>
NAME                                                          BUSINESS EXPERIENCE                                AGE
- -----------------------------------  ----------------------------------------------------------------------     -----
<S>                                  <C>                                                                     <C>
Walter Scott, Jr.*                   Chairman of the Board and President, PKS; also a director of Berkshire          66
                                     Hathaway Inc., Burlington Resources Inc., CalEnergy, ConAgra, Inc.,
                                     C-TEC, U.S. Bancorp and Valmont Industries, Inc.
James Q. Crowe*                      President and Chief Executive Officer, KDG (since August 1, 1997);              48
                                     Chairman of the Board, WorldCom, Inc. (January 1997-July 1997);
                                     Chairman of the Board, MFS (1992-1996) (MFS was a PKS subsidiary until
                                     1995); also a director of CalEnergy, C-TEC, Qwest Communications
                                     International, Inc. and InaCom Corp.
R. Douglas Bradbury*                 Executive Vice President, KDG (since August 1, 1997); Chief Financial           46
                                     Officer (1992-1996), Executive Vice President (1995-1996), and Senior
                                     Vice President (1992-1995) of MFS.
William L. Grewcock                  Vice Chairman, PKS                                                              72
Richard R. Jaros                     Executive Vice President (1993-1997), PKS; Chief Financial Officer              45
                                     (1995-1997); President of KDG (1996-1997); President and COO of
                                     CalEnergy (1992-1993); also a director of CalEnergy, C-TEC and
                                     WorldCom, Inc.
Robert E. Julian                     Chairman of the Board, PKSIS (since 1995); Executive Vice President             58
                                     and Chief Financial Officer, PKS (through 1995)
Kenneth E. Stinson                   Executive Vice President, PKS; Chairman (since 1993) and CEO (since             55
                                     1992) of KCG; also a director of ConAgra, Inc. and Valmont Industries,
                                     Inc.
Robert B. Daugherty                  Director (and formerly Chairman of the Board and Chief Executive                75
                                     Officer) of Valmont Industries, Inc.
Charles M. Harper                    Former Chairman of the Board and Chief Executive Officer of RJR                 69
                                     Nabisco Holdings Corp. Currently a director (and formerly Chairman of
                                     Board and Chief Executive Officer) of ConAgra, Inc. and also a
                                     director of E.I DuPont de Nemours and Company, Norwest Corporation and
                                     Valmont Industries, Inc.
David C. McCourt                     Chairman of the Board and Chief Executive Officer, C-TEC (since 1993);          40
                                     also a director of Mercom, Inc. and WorldCom, Inc.
Michael B. Yanney                    Chairman of the Board, President and Chief Executive Officer, America           63
                                     First Companies L.L.C.; also a director of Burlington Northern Santa
                                     Fe Corporation, C-TEC, Forest Oil Corporation and Mid-America
                                     Apartment Communities, Inc.
</TABLE>
 
    Identified by asterisks are the three persons expected to be executive
officers of Diversified Holdings after consummation of the Transaction. Walter
Scott, Jr. is expected to be Chairman of the Board of Diversified Holdings and
receive an annual salary of $200,000. Effective August 1, 1997, James Q. Crowe
became President and Chief Executive Officer of KDG, with an annual salary of
$350,000. Effective August 1, 1997, R. Douglas Bradbury became Executive Vice
President of KDG, with an annual salary of
 
                                       65
<PAGE>
$215,000. Mr. Crowe and Mr. Bradbury are expected to hold similar positions with
Diversified Holdings. See "Certain Relationships and Related Transactions."
 
    As a result of the Certificate Amendments, the Diversified Holdings Board
will be divided into three classes, designated Class I, Class II and Class III,
each class consisting, as nearly as may be possible, of one-third of the total
number of directors constituting the Diversified Holdings Board. The initial
Class I Directors will consist of Walter Scott, Jr., James Q. Crowe, Robert B.
Daugherty and Charles M. Harper; the initial Class II Directors will consist of
William L. Grewcock, Richard R. Jaros, Robert E. Julian and David C. McCourt;
and the initial Class III Directors will consist of R. Douglas Bradbury, Kenneth
E. Stinson and Michael B. Yanney. The term of the initial Class I Directors will
terminate on the date of the 1998 annual meeting of stockholders; the term of
the initial Class II Directors will terminate on the date of the 1999 annual
meeting of stockholders; and the term of the initial Class III Directors will
terminate on the date of the 2000 annual meeting of stockholders. At each annual
meeting of stockholders beginning in 1998, successors to the class of directors
whose term expires at that annual meeting will be elected for three-year terms.
See "The Certificate Amendments--Board of Directors."
 
    The Diversified Holdings Board will have an Audit Committee, a Compensation
Committee and an Executive Committee.
 
    The Audit Committee members are expected to be Messrs. Julian (Chairman),
Grewcock and McCourt. The functions of the Audit Committee will be to recommend
the selection of the independent auditors; review the results of the annual
audit; inquire into important internal control, accounting and financial
matters; and report and make recommendations to the full Diversified Holdings
Board.
 
    The Compensation Committee members are expected to be Messrs. Yanney
(Chairman), Jaros and McCourt, none of whom are employees of Diversified
Holdings. This committee will review the compensation of Diversified Holdings
executive officers as well as the compensation, securities ownership and
benefits of Diversified Holdings employees.
 
    The Executive Committee members are expected to be Messrs. Scott (Chairman),
Crowe, Bradbury, Stinson and Yanney. This committee will exercise the powers of
the Diversified Holdings Board between board meetings, except powers assigned to
other committees.
 
                                       66
<PAGE>
                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
    In connection with his retention as Chief Executive Officer of KDG, Mr.
Crowe has entered into the Retention Agreement with PKS and KDG. Under the
Retention Agreement, KDG has obtained an option to acquire, from Mr. Crowe, Mr.
Bradbury and others, Broadband Capital Group, L.L.C., a company formed to
develop investment opportunities, for a purchase price equal to the cash
investment in that company, which is not expected to exceed $250,000. Pursuant
to the Retention Agreement, PKS has sold 1,000,000 shares of Class D Stock to
Mr. Crowe and 250,000 shares of Class D Stock to Mr. Bradbury, in each case at
$54.25 per share, the current Class D Per Share Price. The Retention Agreement
also provides that PKS will make available for sale, from time to time prior to
the consummation of the Transaction to certain Diversified Group employees
designated by Mr. Crowe in connection with the implementation of the Expansion
Plan ("Expansion Plan Employees"), up to an aggregate of 750,000 shares of Class
D Stock at a price per share equal to the then applicable Class D Per Share
Price.
 
    The Retention Agreement also sets forth certain provisions that apply only
if the Transaction is abandoned. If the Transaction is abandoned and if, as
currently anticipated, Mr. Crowe resigns as Chief Executive Officer of KDG, (i)
PKS will have the right to repurchase all Class D Stock issued to Mr. Crowe and
Mr. Bradbury under the Retention Agreement at a price per share equal to the
then-applicable Class D Per Share Price, and (ii) Mr. Crowe will have the right
to purchase from the Diversified Group either the stock of subsidiaries formed
to implement the Expansion Plan (but not including PKSIS or any other subsidiary
of the Diversified Group in existence on August 1, 1997) ("Expansion Plan
Subsidiaries") or certain assets acquired by the Diversified Group in connection
with the implementation of the Expansion Plan, in each such case at the book
value of such stock or assets as reflected in the books and records of the
Diversified Group. It is anticipated that such book value will be substantially
lower than the amount of the Diversified Group's aggregate investment in such
subsidiaries or assets. PKS will enter into agreements with each Expansion Plan
Employee that provide that PKS may repurchase any Class D Stock sold to the
Expansion Plan Employee if the Expansion Plan Employee ceases to be an employee
of the Diversified Group (whether through purchase by Mr. Crowe of the capital
stock of any Expansion Plan Subsidiary or assets or otherwise), at any time
within the 12-month period after Mr. Crowe delivers any such resignation notice,
at a price per share equal to the then applicable Class D Per Share Price. See
"Risk Factors Regarding Diversified Holdings After the Transaction--Potential
Consequences of a Failure to Consummate the Transaction."
 
    The Diversified Group is currently in discussions with Mr. Crowe to purchase
an airplane owned by Mr. Crowe. It is anticipated that the purchase price for
the airplane will be its fair market value and that Diversified Holdings will
enter into an arrangement with Mr. Crowe designed to permit Mr. Crowe to use
such airplane other than on Diversified Holdings business.
 
    PKS is currently in discussions to transfer to the Construction Group an
airplane owned by PKS. It is anticipated that PKS Holdings will enter into an
arrangement with Mr. Scott designed to permit Mr. Scott to use such airplane
other than on PKS Holdings business.
 
    PKS entered into a separation agreement with Mr. Jaros, a director of PKS,
in connection with the resignation of Mr. Jaros as President of the Diversified
Group effective July 31, 1997. Under the separation agreement, PKS paid Mr.
Jaros $1.8 million on July 31, and agreed to pay Mr. Jaros the balance of his
1997 salary ($187,500) between August 1 and December 31, 1997 and a bonus
payment of $262,350 when PKS makes its customary executive bonus payments in
1998. PKS also agreed to amend the option agreements with Mr. Jaros with respect
to the options to purchase 150,000 shares of Class D Stock at $40.40 per share
(the then-applicable Class D Per Share Price) granted to Mr. Jaros in 1995, and
the options to purchase 50,000 shares of Class D Stock at $49.50 per share (the
then-applicable Class D Per Share Price) granted to Mr. Jaros in 1996, to
provide that those options would be fully vested on July 31, 1997, and would be
exercisable at any time during the ten-year term of the original option
agreements.
 
                                       67
<PAGE>
    In December 1996, PKS agreed to sell 10,000 shares of Class D Stock to Mr.
Harper, 10,000 shares of Class D Stock to Mr. Daugherty and 8,000 shares of
Class D Stock to Mr. Kiewit, in each case at $49.50 per share (the
then-applicable Class D Per Share Price). Those stock purchase transactions were
consummated in March 1997.
 
    In       , 1997, PKS sold 10,000 shares of Class D Stock to Mr. Yanney and
8,500 shares of Class D Stock to Mr. McCourt, in each case at $54.25 per share
(the then-applicable Class D Per Share Price).
 
    Mr. Stinson has indicated that he will convert all his Debentures into Class
C Stock prior to the record date for the Warrant Distribution as a result of
PKS' permitting such early conversion of Debentures. Mr. Stinson will also be
eligible for the arrangements that PKS intends to make available to ameliorate
certain effects of such conversion on holders of Debentures. The cost of such
arrangement is not expected to exceed $225,000. See "The Transaction--Conversion
of the Debentures."
 
          COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
    The Compensation Committee of PKS consists of Messrs. Daugherty, Harper and
Kiewit. Each of Messrs. Daugherty, Harper and Kiewit purchased Class D Stock
from PKS in 1997. See "Certain Relationships and Related Transactions."
 
    The Compensation Committee of PKS Holdings is expected to consist of Messrs.
Crowe and Kiewit. Mr. Crowe has purchased Class D Stock from PKS and has entered
into the Retention Agreement with PKS and KDG. The Diversified Group is also
currently in discussions with Mr. Crowe with respect to its acquisition of Mr.
Crowe's plane. Mr. Kiewit purchased Class D Stock from PKS in 1997. See "Certain
Relationships and Related Transactions."
 
    The Compensation Committee of Diversified Holdings is expected to consist of
Messrs. Yanney, McCourt and Jaros. Each of Messrs. Yanney and McCourt has
purchased Class D Stock from PKS. Mr. Jaros has entered into a separation
agreement with PKS, pursuant to which, among other things, he has received
certain severance payments. See "Certain Relationships and Related
Transactions."
 
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               COMPARISON OF CLASS C STOCK AND PKS HOLDINGS STOCK
 
GENERAL
 
    In the Share Exchange, each outstanding share of Class C Stock will be
mandatorily exchanged for one fully paid and nonassessable share of PKS Holdings
Stock. Thus, holders of Class C Stock will become stockholders of PKS Holdings
rather than of PKS. See "The Transaction." PKS Holdings Stock will not have any
preemptive or subscription rights. As stockholders of PKS Holdings, such
holders' rights will continue to be governed by Delaware law and will be
governed by the PKS Holdings Certificate and the PKS Holdings By-laws. The
rights of, and restrictions upon, PKS Holdings Stock under the PKS Holdings
Certificate and PKS Holdings By-laws will be substantially similar to those of
Class C Stock under the PKS Certificate and PKS By-laws, except that there will
be no rights or restrictions comparable to those in the PKS Certificate and PKS
By-laws relating to the Class D Stock.
 
    Holders of Class C Stock are stockholders of PKS, not of the Construction
Group, and have an interest in the equity and assets of PKS, including the
assets of the Construction Group, plus one-half of the unconsolidated
stockholders' equity (whether positive or negative) of PKS itself. PKS is a
Delaware corporation. The PKS Certificate authorizes 183,250,000 shares of
capital stock, of which 8,000,000 shares are Class B Stock, 125,000,000 shares
are Class C Stock, 50,000,000 shares are Class D Stock, and 250,000 shares are
PKS preferred stock. As of       , 1997 there were no shares of Class B Stock,
      shares of Class C Stock,       shares of Class D Stock and no shares of
PKS preferred stock outstanding.
 
    Holders of PKS Holdings Stock will be stockholders of PKS Holdings, which
will not be a subsidiary of PKS and which will have an interest only in the
Construction Group. PKS Holdings is a Delaware corporation. The PKS Holdings
Certificate authorizes 125,250,000 shares of capital stock of PKS Holdings, of
which 125,000,000 shares are PKS Holdings Stock and 250,000 shares are PKS
Holdings preferred stock. As of       , 1997 there were 100 shares of PKS
Holdings Stock outstanding, all of which were held by PKS and no shares of PKS
Holdings Preferred Stock outstanding. After the consummation of the Transaction,
there will be an estimated        shares of PKS Holdings Stock and no shares of
PKS Holdings preferred stock outstanding.
 
    Reference is made to the more detailed provisions of, and the following
descriptions are qualified in their entirety by reference to, the PKS
Certificate, the PKS By-laws and the PKS Holdings By-laws, copies of which are
filed with the Commission as exhibits to the Registration Statement of which
this Proxy Statement/Joint Prospectus is a part, and the PKS Holdings
Certificate, a copy of which is attached as Appendix D.
 
    The following discussion relating to PKS Holdings Stock, the PKS Holdings
Certificate and the PKS Holdings By-laws gives effect to the consummation of the
Transaction.
 
DIVIDEND POLICY
 
    Under Delaware law and the PKS Certificate, after dividends have been
declared and set aside for payment or paid on PKS preferred stock (if any)
having a preference over Class C Stock, dividends on Class C Stock may be
declared and paid out of the excess, if any, of the amount legally available
therefor over the Available Class D Dividend Amount, which is equal to the
lesser of (i) the amount legally available for payment of dividends on common
stock of PKS and (ii) an amount equal to (a) the Class D Formula Value less (b)
dividends on Class D Stock declared during the current year. The current policy
is to pay in each year 15% to 20% of the prior year's earnings of the
Construction Group as a cash dividend on Class C Stock.
 
    Under Delaware law and the PKS Holdings Certificate, after dividends have
been declared and set aside for payment or paid on PKS Holdings preferred stock
(if any) having a preference over PKS Holdings Stock, dividends on PKS Holdings
Stock may be declared and paid out of PKS Holdings funds legally available
therefor. PKS Holdings intends to continue the current PKS policy of paying in
each year
 
                                       69
<PAGE>
15% to 20% of the prior year's earnings of the Construction Group as a cash
dividend on PKS Holdings Stock.
 
VOTING RIGHTS
 
    Holders of Class C Stock are entitled to one vote per share on all matters
submitted to a vote of the common stockholders of PKS. Moreover, the holders of
Class C Stock are entitled, as a separate class, to elect two-thirds of the
directors, by cumulative voting, while the remaining directors are elected by
the holders of Class D Stock. The PKS Certificate provides that certain
fundamental corporate changes, such as changes in the capital structure of PKS,
are effective only upon the approval of at least 80% of the outstanding Class C
Stock, voting as a separate class, as well as a majority of the outstanding
voting power of PKS, while certain other actions require the approval of 66 2/3%
of Class C Stock, voting as a separate class, as well as a majority of the
voting power of PKS. The PKS Certificate further provides that, in the event
that the number of issued and outstanding shares of Class C Stock should at any
time be less than the number of issued and outstanding shares of Class D Stock,
the PKS Board may declare stock dividends on Class C Stock without declaring a
corresponding stock dividend on Class D Stock so that the number of outstanding
shares of Class C Stock and Class D Stock will be approximately equal.
 
    Holders of PKS Holdings Stock will be entitled to one vote per share on all
matters submitted to a vote of the common stockholders of PKS Holdings. Holders
of PKS Holdings Stock are entitled to elect the entire PKS Holdings Board by
cumulative voting. The PKS Holdings Certificate provides that certain
fundamental corporate changes, such as changes in the capital structure of PKS
Holdings, are effective only upon the approval of at least 80% of PKS Holdings
Stock, while certain other actions require the approval of 66 2/3% of PKS
Holdings Stock. All of the supermajority voting requirements included in the PKS
Certificate with respect to Class C Stock are included in the PKS Holdings
Certificate with respect to PKS Holdings Stock.
 
REPURCHASE RIGHTS
 
    During the first 15 days of any calendar month, PKS must repurchase shares
of Class C Stock upon the demand of a holder of such stock at the Class C Per
Share Price determined using the Class C Formula Value. The PKS Board may
suspend PKS' duties to repurchase Class C Stock upon the PKS Board's
determination that the Class C Formula Value to be determined at the end of the
current fiscal year is likely to be less than the Class C Formula Value
determined at the end of the prior year less dividends declared on Class C Stock
since the prior fiscal year end. The suspension may not exceed one year. No
voluntary tenders of stock of the affected class will be accepted during the
suspension period. Different suspension periods may be applied to Class C Stock
and Class D Stock. During a Class C Stock suspension period, required
repurchases (E.G., upon employment termination) may continue, but the repurchase
price will be determined as follows: if the suspension period ends during the
first half of the fiscal year (before July 1), the repurchase price will be the
Class C Per Share Price determined as of the end of the prior fiscal year (less
dividends per share declared on Class C Stock since the prior fiscal year end).
However, if the suspension period ends during the second half of a fiscal year
(after June 30), the repurchase price will be the Class C Per Share Price
determined at the end of the suspension period.
 
    During the first 15 days of any calendar month, PKS Holdings will be
required to repurchase shares of PKS Holdings Stock upon demand of a holder of
such stock at the PKS Holdings Per Share Price determined using the PKS Holdings
Formula Value. The PKS Holdings Board may suspend PKS Holdings' duties to
repurchase PKS Holdings Stock upon the PKS Holdings Board's determination that
the PKS Holdings Formula Value to be determined at the end of the current fiscal
year is likely to be less than the PKS Holdings Formula Value determined at the
end of the prior year less dividends declared on PKS Holdings Stock since the
prior fiscal year end. The suspension may not exceed one year. No voluntary
tenders of stock of the affected class will be accepted during the suspension
period. During a PKS
 
                                       70
<PAGE>
Holdings Stock suspension period, required repurchases (E.G., upon employment
termination) may continue, but the repurchase price will be determined as
follows: if the suspension period ends during the first half of the fiscal year
(before July 1), the repurchase price will be the PKS Holdings Per Share Price
determined as of the end of the prior fiscal year (less dividends per share
declared on PKS Holdings Stock since the prior fiscal year end). However, if the
suspension period ends during the second half of a fiscal year (after June 30),
the repurchase price will be the PKS Holdings Per Share Price determined at the
end of the suspension period.
 
LIQUIDATION RIGHTS
 
    Upon the liquidation, dissolution or winding up of PKS, after the creditors
of PKS and the holders of PKS preferred stock (if any) receive the full
preferential amounts to which they are entitled, the PKS Board will establish
two accounts. The "D Liquidation Account" will be in an amount equal to the
value of the Diversified Group's assets, plus an amount equal to one-half of the
unconsolidated stockholders' equity of PKS itself. The "C Liquidation Account"
will be the value of the remaining assets. These values will be determined at
the time of liquidation. Holders of Class C Stock will receive an amount equal
to $1.00 per share out of the C Liquidation Account. After a payment of $2.00
per share to the holders of D Stock out of the D Liquidation Account (and the C
Liquidation Account, if the D Liquidation Account is insufficient to make such
payment), any assets remaining thereafter in the C Liquidation Account will be
distributed to the holders of Class C Stock.
 
    Upon the liquidation, dissolution or winding up of PKS Holdings, after the
creditors of PKS Holdings and the holders of PKS Holdings preferred stock (if
any), receive the full preferential amounts to which they are entitled, holders
of PKS Holdings Stock will be entitled to receive any assets available for
distribution to stockholders of PKS Holdings.
 
CONVERSION RIGHTS
 
    A holder of Class C Stock may convert shares of Class C Stock into Class D
Stock pursuant to the Conversion Right by providing written notice to PKS during
the period from and including October 15 through and including December 15 of
each year. Such conversions generally become effective on January 1 (the
"Conversion Date") of the following year. Shares of Class C Stock are
convertible into a number of shares of Class D Stock that bears the same ratio
to the number of shares surrendered for conversion as the Class C Per Share
Price at the Conversion Date bears to either (i) if Class D Stock is not
publicly traded, the Class D Per Share Price or (ii) if Class D Stock is
publicly traded, the average closing price of Class D Stock for twenty trading
days prior to such date. Instead of effecting the conversion described above,
PKS may repurchase any shares of Class C Stock tendered for such conversion at
the Class C Per Share Price at the Conversion Date by providing written notice
to the tendering stockholder of such election not later than the Conversion
Date. A holder of Class C Stock (but only if such holder is then an employee of
PKS or an entity of which PKS owns at least a 20% equity interest) may withdraw
the tender of shares at any time before, or within 10 days after, PKS provides
written notice that it has elected to repurchase the shares. Partial payment for
such tendered shares shall be made within 60 days after the Conversion Date, and
the balance paid after PKS' financial statements are certified. No conversions
of Class C Stock into Class D Stock will become effective if PKS' duty to
repurchase Class C or Class D Stock is at the time suspended, as provided in the
PKS Certificate.
 
    Holders of PKS Holdings Stock will not have the right to convert their
shares into any security of PKS Holdings or Diversified Holdings. In the event
that the Transaction is consummated, PKS Holdings intends to implement the
Installment Note Program to allow holders of PKS Holdings Stock to sell such
stock to PKS Holdings in exchange for Installment Notes on a tax-deferred
installment basis, as an alternative to a repurchase for cash. See "The
Transaction--Installment Note Program."
 
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<PAGE>
FORMULA VALUE
 
    The Class C Formula Value is an amount equal to the stockholders' equity of
PKS less (i) the book value of certain property, plant and equipment, (ii) the
stockholders' equity attributable to outstanding PKS preferred stock (if any)
and (iii) the Class D Formula Value, based on the year-end audited financial
statements. The Class C Formula Value is the basis for the determination of the
amount paid as dividends on Class C Stock, the amount paid to holders of Class C
Stock upon liquidation of PKS and the Class C Per Share Price at which shares of
Class D Stock must be repurchased by PKS upon demand of the holder thereof,
subject to certain exceptions. The Class C Per Share Price is determined by
increasing the Class C Formula Value by the portion of the face amount of any
outstanding debentures convertible into Class C Stock and dividing the result by
the sum of (i) the number of outstanding shares of Class C Stock and (ii) the
number of shares reserved for the conversion of such debentures into Class C
Stock. This quotient is rounded to the nearest $.05 and reduced by the amount of
any dividends per share declared on Class C Stock since the prior year end to
arrive at the Class C Per Share Price.
 
    The PKS Holdings Formula Value will be an amount equal to the stockholders'
equity of PKS Holdings less (i) the book value of certain property, plant and
equipment and (ii) the stockholders' equity attributable to outstanding PKS
Holdings preferred stock (if any), based on the year-end audited financial
statements. The PKS Holdings Formula Value will be the basis for the
determination of (i) the amount paid as dividends on PKS Holdings Stock and (ii)
the PKS Holdings Per Share Price, at which shares of PKS Holdings Stock must be
repurchased by PKS upon demand of the holder thereof, subject to certain
exceptions. The PKS Holdings Per Share Price will be determined by increasing
the PKS Holdings Formula Value by the portion of the face amount of any
outstanding debentures convertible into PKS Holdings Stock and dividing the
result by the sum of (i) the number of outstanding shares of PKS Holdings Stock
and (ii) the number of shares reserved for the conversion of such debentures
into PKS Holdings Stock. This quotient will be rounded to the nearest $.05 and
reduced by the amount of any dividends per share declared on PKS Holdings Stock
since the prior year end to arrive at the PKS Holdings Per Share Price.
 
MANDATORY EXCHANGE
 
    If all the assets and liabilities of the Construction Group are held by a
wholly owned subsidiary of PKS (such as PKS Holdings), the PKS Board may, by a
two-thirds vote, require the exchange of all the outstanding Class C Stock for
the common stock of such subsidiary, on a pro rata basis; provided that such
subsidiary has a certificate of incorporation substantially similar to the PKS
Certificate. It is pursuant to this provision of the PKS Certificate that the
Share Exchange will be effected by the PKS Board.
 
    Holders of PKS Holdings Stock will not be subject to mandatory exchange
provisions comparable to those to which Class C stockholders are subject.
 
OWNERSHIP AND TRANSFERABILITY RESTRICTIONS
 
    Class C Stock may be owned only by employees of PKS and its subsidiaries
and, with prior PKS Board approval, by certain authorized transferees of such
employees (I.E., fiduciaries for the benefit of members of the immediate
families of employees, corporations wholly owned by employees or employees and
their spouses and/or children, fiduciaries for the benefit of such corporations,
charities, and fiduciaries for charities designated by any such persons). Under
the PKS Certificate, an employee of a subsidiary of which PKS owns at least a
20% equity interest (or any joint venture in which PKS and/or such subsidiary
owns at least a 20% equity interest), is deemed to be an employee for purposes
of Class C Stock ownership and the attendant transfer restrictions. A director
who is a former employee may continue to own Class C Stock. No more than 10% of
the total Class C Stock may be owned by any one employee and certain transferees
at any time.
 
    PKS Holdings Stock may be owned only by employees of PKS Holdings and its
subsidiaries and, with prior PKS Holdings Board approval, by certain authorized
transferees of such employees (I.E., fiduciaries
 
                                       72
<PAGE>
for the benefit of members of the immediate families of employees, corporations
wholly owned by employees or employees and their spouses and/or children,
fiduciaries for the benefit of such corporations, charities, and fiduciaries for
charities designated by any such persons). Under the PKS Holdings Certificate,
an employee of a subsidiary of which PKS Holdings owns at least a 20% equity
interest (or any joint venture in which PKS Holdings and/or such subsidiary owns
at least a 20% equity interest), is deemed to be an employee for purposes of PKS
Holdings Stock ownership and the attendant transfer restrictions. A director who
is a former employee may continue to own PKS Holdings Stock. No more than 10% of
the total PKS Holdings Stock may be owned by any one employee and certain
transferees at any time.
 
    Each holder of Class C Stock is required to execute a repurchase agreement
which provides that a stockholder may offer to sell all or part of the Class C
Stock owned by such stockholder to PKS at any time at the class price determined
by formula and that PKS must accept any such offer, with payment to be made
within 60 days after the receipt of notice of the offer and of the stock
certificates offered by the holder. Upon the tender of a part of such holder's
shares of Class C Stock, PKS may, at its option, require the holder to sell
Class C Stock held by such holder back to PKS. Under the repurchase agreement,
the employee may not transfer the shares of Class C Stock held by such employee
except in a sale to PKS or a transfer to an authorized transferee (I.E., a
charity, etc.). Upon the death, termination or retirement of such employee, all
Class C Stock held by the employee and by such employee's authorized transferees
must be sold back to PKS.
 
    Each holder of PKS Holdings Stock will be required to execute a repurchase
agreement which will provide that a stockholder may offer to sell all or part of
the PKS Holdings Stock owned by such stockholder to PKS Holdings at any time at
the class price determined by formula and that PKS Holdings must accept any such
offer, with payment to be made within 60 days after the receipt of notice of the
offer and of the stock certificates offered by the holder. Upon the tender of a
part of such holder's shares of PKS Holdings Stock, PKS Holdings will be
entitled, at its option, to require the holder to sell PKS Holdings Stock held
by such holder back to PKS Holdings. Under the repurchase agreement, the
employee will not be entitled to transfer the shares of PKS Holdings Stock held
by such employee except in a sale to PKS Holdings or a transfer to an authorized
transferee (I.E., a charity, etc.). Upon the death, termination or retirement of
such employee, all PKS Holdings Stock held by the employee and by such
employee's authorized transferees will be required to be sold back to PKS
Holdings. Each holder of PKS Holdings Stock will be required to execute a
repurchase agreement with PKS Holdings prior to receiving a stock certificate
for the PKS Holdings Stock received in the Share Exchange.
 
LISTING
 
    The Class C Stock is not listed for trading on any stock exchange or market.
PKS Holdings Stock will not be listed for trading on a stock exchange or market
at the Effective Time or thereafter.
 
    Class C Stock is currently registered as an equity security of PKS under the
Exchange Act. Since no shares of Class C Stock will be outstanding after the
consummation of the Transaction it is anticipated that Diversified Holdings will
apply to the Commission for termination of such registration. Upon effectiveness
of the Certificate Amendments, Class C Stock will be eliminated from the PKS
Certificate and will no longer be authorized capital stock of Diversified
Holdings.
 
    PKS Holdings Stock will be registered as an equity security under the
Exchange Act.
 
PREFERRED STOCK
 
    The PKS Board is empowered, without approval of the stockholders, to cause
shares of PKS preferred stock to be issued in one or more series, with the
numbers of shares of each series and the powers, preferences, rights and
limitations of each series to be determined by it; except that no series of PKS
preferred stock may have any voting rights or be convertible into shares of
stock having voting rights.
 
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<PAGE>
    The PKS Holdings Board is empowered, without approval of the stockholders,
to cause shares of PKS Holdings preferred stock to be issued in one or more
series, with the numbers of shares of each series and the powers, preferences,
rights and limitations of each series to be determined by it. Among the specific
matters that may be determined by the PKS Holdings Board are the rate of
dividends, if any; rights and terms of conversion or exchange, if any; the terms
of redemption, if any; the amount payable in the event of any voluntary
liquidation, dissolution or winding up of the affairs of PKS Holdings; the terms
of a sinking or purchase fund, if any. No series of PKS Holdings preferred stock
may have any voting rights or be convertible into shares of stock having voting
rights.
 
LIMITATION ON DIRECTORS' LIABILITY
 
    The PKS Certificate provides, as authorized by Section 102(b)(7) of the
DGCL, that a director of PKS will not be personally liable to PKS or its
stockholders for monetary damages for breach of fiduciary duty as a director,
except for liability (i) for any breach of the director's duty of loyalty to PKS
or its stockholders, (ii) for acts or omissions not in good faith or which
involve intentional misconduct or a knowing violation of law, (iii) for unlawful
payments of dividends or unlawful stock repurchases or redemptions as provided
in Section 174 of the DGCL or (iv) for any transaction from which the director
derived an improper personal benefit.
 
    The PKS Holdings Certificate will contain identical provisions with respect
to PKS Holdings and its directors.
 
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<PAGE>
           COMPARISON OF CLASS D STOCK AND DIVERSIFIED HOLDINGS STOCK
 
GENERAL
 
    The Certificate Amendments will change the name of PKS to "Diversified
Holdings, Inc.", redesignate Class D Stock as "Common Stock, par value $.01 per
share", of Diversified Holdings, modify the repurchase rights to which the
holders of Class D Stock are entitled, delete the provisions regarding Class C
Stock, add certain corporate governance provisions and make certain other
changes described herein. Upon consummation of the Transaction, holders of Class
D Stock will become holders of Diversified Holdings Stock. As stockholders of
Diversified Holdings, such holders' rights will continue to be governed by
Delaware law and will be governed by the Diversified Holdings Certificate and
the Diversified Holdings By-laws.
 
    Holders of Class D Stock are stockholders of PKS, not of the Diversified
Group, and have an interest in the equity and assets of PKS, including the
assets of the Diversified Group plus one-half of the unconsolidated
stockholders' equity (whether positive or negative) of PKS itself. PKS is a
Delaware corporation. The PKS Certificate authorizes 183,250,000 shares of
capital stock, of which 8,000,000 shares are Class B Stock, 125,000,000 shares
are Class C Stock, 50,000,000 shares are Class D Stock, and 250,000 shares are
PKS preferred stock. As of       , 1997 there were no shares of Class B Stock,
      shares of Class C Stock,       shares of Class D Stock and no shares of
PKS preferred stock outstanding.
 
    Holders of Diversified Holdings Stock will continue to be stockholders of
the same Delaware corporation, renamed Diversified Holdings, Inc., which will
have an interest only in the Diversified Group. The Diversified Holdings
Certificate will authorize 510,000,000 shares of capital stock of Diversified
Holdings, of which 500,000,000 shares are Diversified Holdings Stock and
10,000,000 shares are Diversified Holdings preferred stock. After the
consummation of the Transaction, there will be an estimated     shares of
Diversified Holdings Stock and no shares of Diversified Holdings preferred stock
outstanding.
 
    Reference is made to the more detailed provisions of, and such descriptions
are qualified in their entirety by reference to, the PKS Certificate, the PKS
By-laws and the Diversified Holdings By-laws, copies of which are filed with the
Commission as exhibits to the Registration Statement of which this Proxy
Statement/Joint Prospectus is a part, and the Diversified Holdings Certificate,
a copy of which is attached as Appendix E.
 
    The following discussion relating to Diversified Holdings Stock, the
Diversified Holdings Certificate and the Diversified Holdings By-laws gives
effect to the consummation of the Transaction.
 
DIVIDEND POLICY
 
    Under Delaware law and the PKS Certificate, after dividends have been
declared and set aside for payment or paid on PKS preferred stock (if any)
having a preference over Class D Stock, dividends on Class D Stock may be
declared and paid out of the Available Class D Dividend Amount. Dividends of
$.50 per share were paid on Class D Stock in each of 1996 and 1997. Prior to the
time the Transaction is consummated or abandoned, PKS does not intend to declare
or pay any additional dividends on Class D Stock.
 
    Under Delaware law and the Diversified Holdings Certificate, after dividends
have been declared and set aside for payment or paid on Diversified Holdings
preferred stock (if any) having a preference over Diversified Holdings Stock,
dividends on Diversified Holdings Stock may be declared and paid out of
Diversified Holdings funds legally available therefor. It is currently
anticipated that dividends will not be paid on Diversified Holdings Stock in the
foreseeable future.
 
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<PAGE>
VOTING RIGHTS
 
    In general, holders of Class D Stock are entitled to one vote per share on
all matters submitted to a vote of the common stockholders of PKS. Holders of
Class D Stock are entitled, as a separate class, to elect one-third of the PKS
Board. Class D Stock has no right to cumulative voting. In addition, the
affirmative vote of holders of 80% of the outstanding Class D Stock is required
to change the formula for determining the Class D Per Share Price or the Class D
Formula Value. The PKS Certificate further provides that in the event that the
number of issued and outstanding shares of Class C Stock is at any time less
than the number of issued and outstanding shares of Class D Stock, the PKS Board
may declare stock dividends on Class C Stock without declaring a corresponding
stock dividend on Class D Stock so that the number of outstanding shares of
Class C Stock and Class D Stock will be approximately equal.
 
    Holders of Diversified Holdings Stock will be entitled to one vote per share
on all matters submitted to a vote of the common stockholders of Diversified
Holdings, and will elect the entire Diversified Holdings Board. The board of
directors of Diversified Holdings will be classified. Diversified Holdings Stock
will have no right to cumulative voting. Amendment of the Diversified Holdings
By-laws by the Diversified Holdings stockholders will require the affirmative
vote of the holders of two-thirds of the outstanding Diversified Holdings Stock.
The affirmative vote of holders of 80% of Diversified Holdings Stock will be
required to amend the definitions of the Diversified Holdings Per Share Price or
Diversified Holdings Formula Value. Provisions of the Diversified Holdings
Certificate which provide for supermajority voting rights will require the same
supermajority to be amended. Holders of Diversified Holdings Stock will not be
entitled to act by written consent.
 
REPURCHASE RIGHTS
 
    Holders of Class D Stock may, during the first 15 days of any calendar
month, offer to sell Class D Stock to PKS at the Class D Per Share Price. Except
as described below, PKS must accept such offers and purchase Class D Stock for
cash. PKS' duty to repurchase Class D Stock ends if Class D Stock becomes
publicly traded. The PKS Board may suspend PKS' duties to repurchase Class D
Stock upon the PKS Board's determination that the stock formula value for Class
D Stock to be determined at the end of the current fiscal year is likely to be
less than the formula value determined at the end of the prior year less
dividends declared on Class D Stock since the prior fiscal year end. The
suspension period may not exceed one year. No voluntary tenders of Class D Stock
will be accepted during the suspension period. Different suspension periods may
be applied to Class C Stock and Class D Stock. The PKS Board may decide to
conserve PKS' cash by temporarily halting PKS' duty to repurchase Class D Stock
for cash. In such event, payment will be in the form of an interest-bearing
two-year promissory note. However, holders may withdraw tenders of shares that
would be paid for with notes. The PKS Board may choose to invoke this cash
repurchase limitation only after more than 10% of the outstanding shares of
Class D Stock have been tendered in any fiscal year.
 
    Holders of Diversified Holdings Stock will have the right, during the first
15 days of any calendar month, to offer to sell Diversified Holdings Stock to
Diversified Holdings at the Diversified Holdings Per Share Price. Except as
described below, Diversified Holdings will be required to accept such offers and
purchase Diversified Holdings Stock for cash. Diversified Holdings' duty to
repurchase Diversified Holdings Stock will end if Diversified Holdings Stock
becomes publicly traded. The Diversified Holdings Board will have the right to
suspend Diversified Holdings' duties to repurchase Diversified Holdings Stock
upon the Diversified Holdings Board's determination that the stock formula value
for Diversified Holdings Stock to be determined at the end of the current fiscal
year is likely to be less than the formula value determined at the end of the
prior year less dividends declared on Diversified Holdings Stock since the prior
fiscal year end. The suspension period may not exceed one year. No voluntary
tenders of Diversified Holdings Stock will be accepted during the suspension
period. The Diversified Holdings Board will have the right to decide to conserve
Diversified Holdings' cash by temporarily halting Diversified Holdings' duty to
repurchase Diversified Holdings Stock for cash. In such event, payment will be
in the form of interest-
 
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<PAGE>
bearing promissory notes instead of cash. Such promissory notes will have such
term to maturity, up to ten years, as the Diversified Holdings Board may
determine. Holders may withdraw tenders of shares that would be paid for with
notes. The Diversified Holdings Board will have the right to invoke this cash
repurchase limitation only after more than 10% of the outstanding shares of
Diversified Holdings Stock have been tendered in any fiscal year.
 
LIQUIDATION RIGHTS
 
    Upon the liquidation, dissolution or winding up of PKS, after the creditors
of PKS and the holders of PKS preferred stock (if any) receive the full
preferential amounts to which they are entitled, the PKS Board will establish
two accounts. The "D Liquidation Account" will be in an amount equal to the
value of the Diversified Group's assets, plus an amount equal to one-half of the
unconsolidated stockholders' equity of PKS itself. The "C Liquidation Account"
will be the value of the remaining assets. These values will be determined at
the time of liquidation. Holders of Class D Stock will receive an amount equal
to $2.00 per share out of the D Liquidation Account (and the C Liquidation
Account, after the payment of $1.00 to holders of Class C Stock, if the D
Liquidation Account does not contain sufficient funds to make such payment). Any
assets remaining thereafter in the D Liquidation Account will be distributed to
the holders of Class D Stock.
 
    Upon the liquidation, dissolution or winding up of Diversified Holdings,
after the creditors of Diversified Holdings and the holders of Diversified
Holdings preferred stock (if any) receive the full preferential amounts to which
they are entitled, holders of Diversified Holdings Stock will be entitled to
receive any assets available for distribution to holders of Diversified Holdings
Stock.
 
CONVERSION RIGHTS
 
    A holder of Class D Stock who is offered Class C Stock in connection with
PKS' annual offering of stock to employees may, in lieu of purchasing such
shares of Class C Stock, convert shares of Class D Stock into the number of
shares of Class C Stock (up to the number of shares of Class C Stock offered)
that bears the same ratio to the number of shares surrendered for conversion as
the Class D Per Share Price on the date PKS receives notice of the conversion
bears to the Class C Per Share Price. No conversions of Class D Stock into Class
C Stock are allowed after Class D Stock has become publicly traded or if PKS'
duty to repurchase Class D Stock is at the time suspended, as provided in the
PKS Certificate.
 
    Holders of Diversified Holdings Stock will not have the right to convert
their Diversified Holdings Stock into any security of PKS Holdings or
Diversified Holdings.
 
FORMULA VALUE
 
    The Class D Formula Value is an amount equal to (i) the stockholders' equity
of the entities comprising the Diversified Group plus (ii) one-half of the
stockholders' equity of PKS itself on an unconsolidated basis and without
considering PKS' investment in any subsidiaries. The Class D Formula Value is
the basis for the determination of the amount paid as dividends on Class D Stock
and, unless and until Class D Stock is publicly traded, the Class D Per Share
Price at which shares of Class D Stock must be repurchased by PKS upon the
demand of the holders thereof. The Class D Per Share Price is determined by
increasing the Class D Formula Value by the portion of the face amount of any
outstanding debentures convertible into Class D Stock and dividing the result by
the sum of (i) the number of outstanding shares of Class D Stock and (ii) the
number of shares reserved for the conversion of such debentures. This quotient
is rounded to the nearest $.05 and reduced by the amount of any dividends per
share declared on Class D Stock since the prior year end to arrive at the Class
D Per Share Price.
 
    The Diversified Holdings Formula Value is an amount equal to the
stockholders' equity of Diversified Holdings, less the stockholders' equity
attributable to outstanding Diversified Holdings preferred stock (if any). The
Diversified Holdings Formula Value is the basis for the determination of the
Diversified
 
                                       77
<PAGE>
Holdings Per Share Price, the price at which, unless and until Diversified
Holdings Stock is publicly traded, shares of Diversified Holdings Stock must be
repurchased by Diversified Holdings upon the demand of the holders thereof. The
Diversified Holdings Per Share Price is determined by dividing (i) the sum of
(a) the Diversified Holdings Formula Value plus (b) the portion of the face
amount of any outstanding securities convertible into Diversified Holdings Stock
by (ii) the sum of (a) the number of outstanding shares of Diversified Holdings
Stock plus (b) the total number of shares reserved for issuance upon the
conversion of outstanding securities convertible into Diversified Holdings
Stock. This quotient is rounded to the nearest $.05 and reduced by the amount of
any dividends per share declared on the Diversified Holdings Stock since the
prior year end to arrive at the Diversified Holdings Per Share Price. See
"--Repurchase Rights." Neither the Diversified Holdings Formula Value nor the
Diversified Holdings Per Share Price will be used to determine the amounts
available for dividends on Diversified Holdings Stock. See "--Dividend Policy."
 
MANDATORY EXCHANGE
 
    Unless and until Class D Stock has become publicly traded, under the PKS
Certificate the PKS Board may, by a two-thirds vote, require an exchange of the
outstanding shares of Class D Stock for shares of Class C Stock. The number of
shares of Class C Stock to be issued in such exchange will be determined by the
ratio of the Class D Per Share Price to the Class C Per Share Price. The two
prices will be those two prices as of the date of the exchange. If the holder of
Class D Stock is not eligible to own Class C Stock, such holder will be paid
cash for his or her Class D Stock, at the Class D Per Share Price.
 
    Holders of Diversified Holdings Stock will not be subject to mandatory
exchange provisions comparable to those to which holders of Class D Stock are
subject.
 
OWNERSHIP AND TRANSFERABILITY RESTRICTIONS
 
    Under the PKS Certificate, there are no restrictions on the transfer or
ownership of Class D Stock. Under the Diversified Holdings Certificate, there
will be no restrictions on the transfer or ownership of Diversified Holdings
Stock.
 
LISTING
 
    Class D Stock is not listed for trading on any stock exchange or market, and
Diversified Holdings does not expect to list Diversified Holdings Stock for
trading on a stock exchange or market at the Effective Time. Diversified
Holdings expects that it will not seek such a listing until it raises capital
through a public equity offering or desires to have a listed equity security
available for acquisitions. Any determination to raise public equity capital
will depend on a number of factors including, without limitation, Diversified
Holdings' capital needs, the availability and attractiveness of alternative
sources of capital, the performance of Diversified Holdings and conditions in
the public equity markets. Accordingly, no assurance can be given, that
Diversified Holdings Stock will be listed for trading in the future, or, if it
is, when such listing will be accomplished or whether an active trading market
will develop or be sustained.
 
PREFERRED STOCK
 
    The PKS Board is empowered, without approval of the stockholders, to cause
shares of PKS preferred stock to be issued in one or more series, with the
numbers of shares of each series and the powers, preferences, rights and
limitations of each series to be determined by it. Among the specific matters
that may be determined by the PKS Board are the rate of dividends, if any;
rights and terms of conversion or exchange, if any; the terms of redemption, if
any; the amount payable in the event of any voluntary liquidation, dissolution
or winding up of the affairs of PKS; the terms of a sinking or purchase fund, if
any. No series of PKS preferred stock may have any voting rights or be
convertible into shares of stock having voting rights.
 
                                       78
<PAGE>
    The Diversified Holdings Board is empowered, without approval of the
stockholders, to cause shares of Diversified Holdings preferred stock to be
issued in one or more series, with the numbers of shares of each series and the
powers, preferences, rights and limitations of each series to be determined by
it. Among the specific matters that may be determined by the Diversified
Holdings Board are the rate of dividends, if any; rights and terms of conversion
or exchange, if any; the terms of redemption, if any; the amount payable in the
event of any voluntary liquidation, dissolution or winding up of the affairs of
Diversified Holdings; the terms of a sinking or purchase fund, if any. PKS
Holdings preferred stock may have any voting rights or be convertible into
shares of stock having voting rights.
 
    It is anticipated that Diversified Holdings will adopt the Diversified
Holdings Rights Plan. Prior thereto, the Diversified Holdings Board will
establish the Rights Plan Preferred Stock, with such rights and privileges as
described in "The Certificate Amendments--Diversified Holdings Rights Plan."
 
LIMITATION ON DIRECTORS' LIABILITY
 
    The PKS Certificate provides, as authorized by Section 102(b)(7) of the
DGCL, that a director of PKS will not be personally liable to PKS or its
stockholders for monetary damages for breach of fiduciary duty as a director,
except for liability (i) for any breach of the director's duty of loyalty to PKS
or its stockholders, (ii) for acts or omissions not in good faith or which
involve intentional misconduct or a knowing violation of law, (iii) for unlawful
payments of dividends or unlawful stock repurchases or redemptions as provided
in Section 174 of the DGCL or (iv) for any transaction from which the director
derived an improper personal benefit.
 
    The Diversified Holdings Certificate will contain identical provisions with
respect to Diversified Holdings and its directors.
 
                                       79
<PAGE>
                         CERTAIN PER SHARE INFORMATION
 
CLASS C DIVIDENDS AND PER SHARE VALUES
 
    The following table sets forth dividends paid on Class C Stock during 1995,
1996 and 1997 and the Class C Per Share Price after each dividend payment.
 
<TABLE>
<CAPTION>
                                                                                                           CLASS C
                                                                          DIVIDEND PER                      STOCK
DATE PAID                                                                     SHARE      PRICE ADJUSTED     PRICE
- ------------------------------------------------------------------------  -------------  ---------------  ---------
<S>                                                                       <C>            <C>              <C>
Jan. 5, 1995............................................................    $    0.45    Dec. 31, 1994    $   25.55
May 1, 1995.............................................................         0.45    May 1, 1995          25.10
Jan. 5, 1996............................................................         0.60    Dec. 30, 1995        32.40
May 1, 1996.............................................................         0.60    May 1, 1996          31.80
Jan. 4, 1997............................................................         0.70    Dec. 28, 1996        40.70
May 1, 1997.............................................................         0.70    May 1, 1997          40.00
</TABLE>
 
CLASS D DIVIDENDS AND PER SHARE VALUES
 
    The following table sets forth dividends paid on Class D Stock during 1995,
1996 and 1997 and the Class D Per Share Price after each dividend payment.
 
<TABLE>
<CAPTION>
                                                                                                            CLASS D
                                                                          DIVIDEND PER                       STOCK
DATE PAID                                                                     SHARE      PRICE ADJUSTED      PRICE
- ------------------------------------------------------------------------  -------------  ---------------  -----------
<S>                                                                       <C>            <C>              <C>
Sep. 30, 1995*..........................................................    $   19.85    Sep. 30, 1995     $   40.40
Jan. 5, 1996............................................................         0.50    Dec. 30, 1995         49.50
Jan. 4, 1997............................................................         0.50    Dec. 28, 1996         54.25
</TABLE>
 
- ------------------------
 
*   Spin-off of investment in MFS.
 
                                       80
<PAGE>
                          DESCRIPTION OF THE WARRANTS
 
    The Warrants are to be issued under a Warrant Agreement (the "Warrant
Agreement") between PKS and a warrant agent to be selected by PKS (which may be
PKS) prior to the Warrant Distribution (the "Warrant Agent"). The statements
herein relating to the Warrants and the Warrant Agreement are summaries and are
subject to the detailed provisions of the Warrant Agreement, to which reference
is hereby made for a complete statement of those provisions. Whenever particular
provisions of the Warrant Agreement or terms defined therein are referred to
herein, those provisions or definitions are incorporated by reference as a part
of the statements made, and the statements are qualified in their entirety by
that reference. A copy of the Warrant Agreement has been filed as an exhibit to
the Registration Statement of which this Proxy Statement/Joint Prospectus is a
part. See "Available Information."
 
GENERAL
 
    Prior to the Effective Time, PKS will effect the Warrant Distribution by
declaring a dividend of eight-tenths of one Warrant with respect to each
then-outstanding share of Class C Stock, at which time each eight-tenths of one
Warrant will attach to each share of Class C Stock. Each Warrant will entitle
the registered holder thereof to purchase one share of Class D Stock (or, after
the Certificate Amendments have been effected, one share of Diversified Holdings
Stock) at the Exercise Price. At the Effective Time, the eight-tenths of one
Warrant will attach to the share of PKS Holdings Stock which will be exchanged
for such share of Class C Stock, except as described in "The
Transaction--Conversion of Class C Stock Prior to the Transaction" above.
Certificates representing the Warrants will not be distributed until after the
Share Exchange is consummated. Diversified Holdings will not be required to
issue any fractional shares of Diversified Holdings Stock upon the exercise of
any Warrant, and instead will pay cash in lieu of any such fractional shares.
Fractional Warrants may be issued.
 
EXPIRATION OF THE WARRANTS
 
    The Warrants will expire at 5:00 p.m. New York City time (the "Close of
Business") on (i) October 15, 1998 (or such later date as may be determined by
the PKS Board), if the Share Exchange has not occurred on or prior to such date
or (ii) April 15, 2010, if the Share Exchange occurred on or prior to October
15, 1998 (or such date later than October 15, 1998 as may be determined by the
PKS Board) (such date of expiration being referred to as the "Expiration Date").
After the Close of Business on the Expiration Date, no Warrant may be exercised
and the Warrants will be void and of no value.
 
EXERCISE PERIODS
 
    If Diversified Holdings Stock is not publicly traded, each Warrant for which
the Exercise Conditions have been met may be exercised after December 31, 1999
on any business day during the 20-day period each year (the "Private Exercise
Period") following the delivery to registered holders of Warrants of an Exercise
Price Certificate (as defined below) for such year. If Diversified Holdings
Stock is publicly traded, each Warrant for which the Exercise Conditions have
been met may be exercised on any business day during each period from the first
business day of each calendar month through and including the sixth day
thereafter (the "Public Exercise Period") following such period of at least 90
but less than 180 days after the date on which Diversified Holdings Stock first
becomes publicly traded, as Diversified Holdings may determine if so requested
by an underwriter of Diversified Holdings Stock in connection with an initial
underwritten public offering thereof. For purposes of the Warrants, Diversified
Holdings Stock is deemed to be "publicly traded" if it is listed on a national
securities exchange or is traded on the Nasdaq National Market or the Nasdaq
SmallCap Market, and has been so listed or traded for at least 15 business days.
 
EXERCISE CONDITIONS
 
    No Warrant may be exercised if the Exercise Conditions with respect to such
Warrant have not yet been met. The Exercise Conditions with respect to a given
Warrant (or fraction thereof) will be deemed to have been met upon both (i) the
delivery to the Warrant Agent of the related documentation required by
 
                                       81
<PAGE>
the Warrant Agreement and (ii) the occurrence of the earliest of: (a) the
repurchase or redemption by PKS Holdings of the share of PKS Holdings Stock to
which such Warrant is attached; (b) the exchange of the share of PKS Holdings
Stock to which such Warrant is attached into another class of securities of PKS
Holdings intended to be issued primarily to persons leaving employment of PKS
Holdings; and (c) April 15, 2006. Notwithstanding the limitations described in
the preceding two sentences, the Warrants will be exercisable after a Change of
Control (as defined in the Warrant Agreement) of Diversified Holdings has
occurred.
 
EXERCISE PRICE
 
    The Exercise Price, Trading Price and Fixed Dollar Discount used for any
purpose, including with respect to the exercise of a Warrant, are as set forth
in the most recent certificate ("Exercise Price Certificate") provided to the
Warrant Agent by Diversified Holdings or prepared by the Warrant Agent.
 
    The "Exercise Price" set forth in each Exercise Price Certificate will be
equal to (i) the Trading Price set forth in such Exercise Price Certificate
minus (ii) the Fixed Dollar Discount with respect to such Trading Price, subject
to certain adjustments; provided, however, that in no event shall such Exercise
Price be less than $.01.
 
    The Fixed Dollar Discount used to calculate any Exercise Price will be equal
to (i) if the Trading Price is greater than or equal to the $82.00, $25.00 or
(ii) if the Trading Price is less than the $82.00, $25.00 minus the amount by
which $82.00 exceeds the Trading Price; provided, however, that in no event
shall the Fixed Dollar Discount be less than $15.00.
 
    The Exercise Price, the terms used to calculate the Exercise Price and the
number of shares of Diversified Holdings Stock received upon the exercise of
each Warrant are subject to adjustment under certain circumstances. See
"--Certain Adjustments."
 
    EXERCISE PRICE IF NOT PUBLICLY TRADED.  If, at the end of any fiscal year of
Diversified Holdings beginning with the fiscal year ended December 31, 1999, the
Diversified Holdings Stock is not publicly traded, Diversified Holdings is
required, at any time before February 28 immediately following the end of such
fiscal year, to deliver to the Warrant Agent an Exercise Price Certificate. The
"Trading Price" set forth in such an Exercise Price Certificate will be the
Appraised Value (as defined below) set forth in the most recent Appraisal (as
defined below) delivered to Diversified Holdings.
 
    Prior to the delivery of each such Exercise Price Certificate, Diversified
Holdings will cause to be conducted an appraisal (an "Appraisal") of the per
share value of the Diversified Holdings Stock as of the last day of the fiscal
year to which such Exercise Price Certificate relates by an investment bank
selected by the Diversified Holdings Board from a list set forth in the Warrant
Agreement. This investment bank will determine the per share value of the
Diversified Holdings Stock as if the Diversified Holdings Stock was publicly
traded and then submit the per share value to the Diversified Holdings Board for
its approval. The value per share of the Diversified Holdings Stock set forth in
the Appraisal as approved by the Diversified Holdings Board will be the
"Appraised Value."
 
    Promptly after its receipt of any such Exercise Price Certificate, the
Warrant Agent will mail to the registered holders of Warrants a copy of such
Exercise Price Certificate.
 
    EXERCISE PRICE IF PUBLICLY TRADED.  During any period in which the
Diversified Holdings Stock is publicly traded, the Warrant Agent or Diversified
Holdings, as determined by Diversified Holdings, will, on the last business day
of each calendar month, prepare an Exercise Price Certificate, setting forth the
Exercise Price, Trading Price and Fixed Dollar Discount as of the Close of
Business of the last business day of such month.
 
    The "Trading Price" for any such period will be the arithmetic mean of the
daily Mean Reported Prices (as defined) of Diversified Holdings Stock for the
last 15 business days of the calendar month prior to the date of such Exercise
Price Certificate. The "Mean Reported Price" of Diversified Holdings Stock is
the arithmetic mean between the highest reported asked price and the lowest
reported bid price for
 
                                       82
<PAGE>
Diversified Holdings Stock, as reported on the Composite Quotation System, on
the principal national securities exchange on which it is listed or admitted to
trading, or as reported by the Nasdaq National Market or Nasdaq SmallCap Market,
as appropriate. Adjustments will be made in such calculation if, during any
period being used to calculate such Trading Price, any of the terms used in such
calculation are required to be adjusted pursuant to the anti-dilution provisions
of the Warrant Agreement.
 
RESTRICTIONS ON TRANSFER
 
    No Warrants may be transferred prior to the Share Exchange. Following the
Share Exchange and prior to the first day on which a given Warrant becomes
exercisable (the "Restricted Period Termination Date"), such Warrant may only be
transferred (i) to Diversified Holdings or its designee (a "Permitted Transfer")
or (ii) in a simultaneous transfer to the same transferee with the share of PKS
Holdings Stock to which such Warrant is attached (an "Attached Transfer")
provided that such transfer of such share of PKS Holdings Stock is permitted by
the PKS Holdings Certificate. On and after the Share Exchange and the Restricted
Period Termination Date with respect to a given Warrant, such Warrant will be
freely transferable, subject to the terms of the Warrant Agreement.
 
FORM AND DENOMINATIONS
 
    The certificates representing the Warrants (the "Warrant Certificates") will
be in registered form. Diversified Holdings will only deliver Warrant
Certificates representing the Warrants after the occurrence of the Share
Exchange. See "The Transaction--Exchange of Class C Stock; Delivery of
Certificates for PKS Holdings Stock and Warrants." Certificates may be exchanged
for other certificates in different denominations representing Warrants to
purchase the same aggregate number of shares at any time; provided, however,
that following the Share Exchange and prior to the Restricted Period Termination
Date with respect to a given Warrant (or fraction thereof), the Warrant
Certificate representing such Warrant may only be exchanged if both (i) such
exchange is simultaneous with the exchange of the share certificate representing
the share of Class C Stock to which such Warrant (or fraction thereof) is
attached and (ii) such Warrant Certificate is accompanied by a duly completed
and executed certificate of the Stock Registrar of PKS Holdings.
 
OFFICE FOR PRESENTATION
 
    Warrants may be presented upon exercise, or for registration of transfer or
exchange, at the offices of the Warrant Agent maintained for such purposes. No
charge will be made in connection with the transfer or exchange of any Warrant.
 
PAYMENT OF EXERCISE PRICE
 
    Upon exercising Warrants, a holder will pay to the Warrant Agent the
Exercise Price for the number of shares with respect to which the Warrants are
exercised. The payment will, at the option of the holder, be made (i) in cash or
by certified check or wire transfer of immediately available funds, (ii)
pursuant to a Share Exercise, by delivering share certificates, duly endorsed
for transfer, representing a number of shares of Diversified Holdings Stock
determined in accordance with a specified formula described below or (iii)
pursuant to a Cashless Exercise, by reducing the number of shares of Diversified
Holdings Stock that would otherwise be issuable upon exercise of the Warrants in
accordance with a specified formula described below. In a Share Exercise, the
number of shares of Diversified Holdings Stock to be delivered by the holder of
the Warrants to the Warrant Agent will equal (a) the Exercise Price for the
number of shares with respect to which the Warrants are exercised divided by (b)
the Trading Price used in calculating the Exercise Price in effect on the date
of exercise of the Warrants. In a Cashless Exercise, the number of shares of
Diversified Holdings Stock that otherwise would be obtainable upon the exercise
of the Warrants and the payment in cash of the Exercise Price therefor will be
reduced so as to yield a number of shares upon the exercise of such Warrants as
equals the product of (x) the number of shares of Diversified Holdings Stock
issuable as of the date of exercise upon the exercise of such Warrants (if
payment of the
 
                                       83
<PAGE>
Exercise Price were being made in cash) and (y) the "Cashless Exercise Ratio."
The "Cashless Exercise Ratio" is a fraction, the numerator of which is the Fixed
Dollar Discount used in calculating the Exercise Price in effect on the date of
exercise of such Warrants, and the denominator of which is the Trading Price
used in calculating the Exercise Price in effect on such date. For a discussion
of certain U.S. federal income tax considerations concerning the manner in which
a holder elects to pay the Exercise Price, see "The Transaction--Certain U.S.
Federal Income Tax Considerations."
 
CERTAIN ADJUSTMENTS
 
    The number of shares of Diversified Holdings Stock or other securities
purchasable upon the exercise of each Warrant, the Exercise Price and certain
terms used to calculate the Exercise Price are subject to adjustment upon (i)
the issuance by Diversified Holdings of any dividend or distribution to holders
of its capital stock (including Diversified Holdings Stock) in shares of
Diversified Holdings Stock, or any subdivision, combination or reclassification
of the Diversified Holdings Stock, (ii) any distribution by Diversified Holdings
generally to the holders of its Diversified Holdings Stock of certain rights,
options or warrants to subscribe for or purchase shares of Diversified Holdings
Stock at a price per share lower than the then current Trading Price or (iii)
any distribution by Diversified Holdings generally to the holders of its
Diversified Holdings Stock of evidences of indebtedness or assets (including
cash dividends), or other rights, options, warrants or convertible or
exchangeable securities containing the right to subscribe for or purchase
Diversified Holdings Stock. No adjustment in the Exercise Price or the number of
shares purchasable upon the exercise of the Warrants will be required until
cumulative adjustments reach a specified minimum. In lieu of adjusting the
number of shares of Diversified Holdings Stock issuable upon exercise of each
Warrant, Diversified Holdings may elect to adjust the number of outstanding
Warrants.
 
    Notwithstanding the foregoing, in case of consolidation, merger, sale or
conveyance of the property of Diversified Holdings as an entirety or
substantially as an entirety, the holder of each outstanding Warrant will
continue to have the right to exercise the Warrant for the kind and amount of
shares and other securities and property receivable by a holder of the number of
shares of Diversified Holdings Stock for which such Warrants were exercisable
immediately prior thereto.
 
MODIFICATION OF WARRANT AGREEMENT
 
    The Warrant Agreement may be amended or supplemented without the consent of
the registered holders of Warrants to effect changes that do not adversely
affect, alter or change the interests of the Warrant holders. Diversified
Holdings and the Warrant Agent may otherwise amend or supplement the Warrant
Agreement with the consent of the holders of at least 66 2/3% of the Warrants
then outstanding (including, without limitation, consents obtained in connection
with a tender offer or exchange offer for the Warrants); provided, however, that
without the consent of the holder of each Warrant then outstanding, such
amendments or supplements may not (i) reduce the number of Warrants whose
holders must consent to an amendment or supplement, (ii) reduce the number of
shares to which a holder is entitled upon exercise of a Warrant, (iii) increase
the Exercise Price or (iv) change the amendment provisions of the Warrant
Agreement.
 
HOLDER OF WARRANTS NOT DEEMED A STOCKHOLDER
 
    No holder of Warrants will be entitled to vote or to receive dividends or to
consent or to receive notice as stockholders in respect of the meetings of
stockholders or for the election of directors of PKS or Diversified Holdings or
any other matter, or any rights whatsoever as stockholders of PKS or Diversified
Holdings.
 
                                       84
<PAGE>
       SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT OF
                   PKS, PKS HOLDINGS AND DIVERSIFIED HOLDINGS
 
PKS (BEFORE THE TRANSACTION)
 
    The following table sets forth certain information with respect to the
ownership of Class C Stock and Class D Stock as of August 15, 1997 by PKS'
directors and executive officers (individually and as a group), and each person
known by PKS to beneficially own more than 5% of the outstanding Class C Stock
or Class D Stock.
 
<TABLE>
<CAPTION>
                                         NUMBER OF SHARES   PERCENT OF CLASS C   NUMBER OF SHARES OF     PERCENT OF
NAME                                     OF CLASS C STOCK          STOCK            CLASS D STOCK       CLASS D STOCK
- ---------------------------------------  -----------------  -------------------  -------------------  -----------------
<S>                                      <C>                <C>                  <C>                  <C>
Walter Scott, Jr.(1)...................         250,000                2.5%            3,393,374               13.8%
William L. Grewcock(2).................           2,048                  *             1,117,291                4.5
Kenneth E. Stinson(3)..................         636,416                6.3                32,216                  *
Richard Geary(4).......................         533,768                5.3                36,360                  *
George B. Toll, Jr.....................         401,883                4.0                87,711                  *
Richard W. Colf........................         398,217                3.9                72,282                  *
Tait P. Johnson........................         188,934                1.9                38,616                  *
Bruce E. Grewcock(5)...................         192,775                1.9                52,787                  *
Richard R. Jaros(6)....................          25,772                  *               121,128                  *
James Q. Crowe.........................         --                  --                   134,369                  *
Robert B. Daugherty....................         --                  --                    19,000                  *
Charles M. Harper......................         --                  --                    19,000                  *
Peter Kiewit, Jr.......................         --                  --                    10,000                  *
Allan K. Kirkwood......................         272,959                2.7                61,991                  *
 
Directors and Executive Officers as a
  Group................................       2,902,772               28.8             5,196,125               21.1
 
Donald L. Sturm(7).....................         --                  --                 1,822,375                7.4
</TABLE>
 
- ------------------------
 
*   Less than 1%
 
(1) Table does not include 2,040,156 shares of Class D Stock held in irrevocable
    trusts for children. Does not include 16,275 shares of Class D Stock owned
    by the Suzanne and Walter Scott Foundation. Does not include 9,970 shares of
    Class D Stock held by Suzanne Scott Irrevocable Trust.
 
(2) Does not include 35,123 shares of Class D Stock held by the Bill and
    Berniece Grewcock Foundation, nor 1,884 shares of Class D Stock owned by
    Mrs. Grewcock.
 
(3) Does not include 24,200 shares of Class D Stock held in trusts for children.
 
(4) Does not include 40,000 shares of Class D Stock owned by Mrs. Geary or
    20,892 shares of Class D Stock held in children's trust for which Mr. Geary
    is the trustee.
 
(5) Does not include 25,200 shares of Class D Stock held in irrevocable trusts
    for which Mr. Grewcock is a trustee.
 
(6) Does not include 2,000 shares of Class D Stock held by Mr. Jaros' children.
 
(7) Mr. Sturm's business address is 3033 East First Avenue, Denver, Colorado
    80206. Includes 30,000 shares of Class D Stock held in the Donald L. Sturm
    Trust and 30,159 shares of Class D Stock held in Sturm Family Ltd.
 
                                       85
<PAGE>
PKS HOLDINGS
 
    The following table sets forth certain information with respect to the
expected beneficial ownership of PKS Holdings Stock immediately after
consummation of the Transaction, by the persons currently anticipated to be
executive officers or directors of PKS Holdings or beneficial owners of more
than 5% of the outstanding PKS Holdings Stock immediately after consummation of
the Transaction.
 
<TABLE>
<CAPTION>
                                                                                                     PERCENT OF
                                                                         NUMBER OF SHARES      PKS HOLDINGS STOCK(2)
                                                                           PKS HOLDINGS     ----------------------------
NAME                                                                         STOCK(1)        SCENARIO 1     SCENARIO 2
- -----------------------------------------------------------------------  -----------------  -------------  -------------
<S>                                                                      <C>                <C>            <C>
Walter Scott, Jr.......................................................         250,000             2.8%           3.3%
Kenneth E. Stinson.....................................................         692,742             7.7            9.2
Richard Geary..........................................................         538,335             6.0            7.2
Bruce E. Grewcock......................................................         205,334             2.3            2.7
George B. Toll, Jr.....................................................         407,809             4.5            5.4
Richard W. Colf........................................................         408,990             4.5            6.4
Tait P. Johnson........................................................         195,772             2.2            2.6
Allan K. Kirkwood......................................................         281,916             3.1            3.7
Thomas C. Stortz.......................................................         146,153             1.6            1.9
William L. Grewcock....................................................           2,048               *              *
James Q. Crowe.........................................................         --               --             --
Peter Kiewit, Jr.......................................................         --               --             --
 
Directors and Executive Officers
  as a Group...........................................................       3,129,099            34.7           41.6
</TABLE>
 
- ------------------------
 
*   Less than 1%.
 
(1) Based on the beneficial ownership of PKS securities by such persons as of
    August 15, 1997. Assumes that (i) none of the shares of Class C Stock held
    by any of the persons listed in the table is converted into Class D Stock
    during the 1997 Conversion Period and (ii) any outstanding Debentures and
    PKS Series 1992 Class C Convertible Debentures held by any of such persons
    are converted into shares of Class C Stock prior to the record date for the
    Warrant Distribution.
 
(2) Calculated assuming that 1,500,000 shares (Scenario 1) and 3,000,000 shares
    (Scenario 2) of Class C Stock are converted into Class D Stock during the
    1997 Conversion Period.
 
                                       86
<PAGE>
DIVERSIFIED HOLDINGS
 
    The following table sets forth certain information with respect to the
expected beneficial ownership of Diversified Holdings Stock immediately after
consummation of the Transaction by the persons currently anticipated to be
executive officers or directors of Diversified Holdings or beneficial owners of
more than 5% of the outstanding Diversified Holdings Stock immediately after
consummation of the Transaction.
 
<TABLE>
<CAPTION>
                                                                                                 PERCENT OF SHARES
                                                                                              OF DIVERSIFIED HOLDINGS
                                                                         NUMBER OF SHARES             STOCK(2)
                                                                          OF DIVERSIFIED    ----------------------------
NAME                                                                     HOLDINGS STOCK(1)   SCENARIO 1     SCENARIO 2
- -----------------------------------------------------------------------  -----------------  -------------  -------------
<S>                                                                      <C>                <C>            <C>
Walter Scott, Jr.(3)...................................................       3,393,374            12.6%          12.1%
James Q. Crowe.........................................................       1,134,369             4.2            4.0
R. Douglas Bradbury....................................................         255,519               *              *
William L. Grewcock(4).................................................       1,117,291             4.2            4.0
Richard R. Jaros(5)....................................................         121,128               *              *
Robert E. Julian(6)....................................................         403,908             1.5            1.4
Kenneth E. Stinson(7)..................................................          32,216               *              *
Robert B. Daugherty....................................................          19,000               *              *
Charles M. Harper......................................................          19,000               *              *
David C. McCourt.......................................................          10,000               *              *
Michael B. Yanney......................................................          10,000               *              *
Directors and Executive Officers as a Group............................       6,515,805            24.2           23.2
Donald L. Sturm(8).....................................................       1,822,375             6.8            6.5
</TABLE>
 
- ------------------------
 
*   Less than 1%.
 
(1) Based on the beneficial ownership of PKS securities by such persons as of
               , 1997. Assumes that none of the shares of Class C Stock held by
    any of the persons listed in the table is converted into Class D Stock
    during the 1997 Conversion Period.
 
(2) Calculated assuming that 1,500,000 shares (Scenario 1) and 3,000,000 shares
    (Scenario 2) of Class C Stock are converted into Class D Stock during the
    1997 Conversion Period.
 
(3) Table does not include 2,040,156 shares of Class D Stock held in irrevocable
    trusts for children. Does not include 16,275 shares of Class D Stock owned
    by the Suzanne and Walter Scott Foundation. Does not include 9,970 shares of
    Class D Stock held by Suzanne Scott Irrevocable Trust.
 
(4) Does not include 35,123 shares of Class D Stock held by the Bill and
    Berniece Grewcock Foundation, nor 1,884 shares of Class D Stock owned by
    Mrs. Grewcock.
 
(5) Does not include 2,000 shares of Class D Stock held by Mr. Jaros' children.
 
(6) Does not include 82,198 shares of Class D Stock held in trusts nor 20,000
    shares of Class D Stock held by Mr. Julian's children.
 
(7) Does not include 24,200 shares of Class D Stock held in trusts for children.
 
(8) Mr. Sturm's business address is 3033 East First Avenue, Denver, Colorado
    80206. Includes 30,000 shares of Class D Stock held in the Donald L. Sturm
    Trust and 30,159 shares of Class D Stock held in Sturm Family Ltd.
 
                                       87
<PAGE>
                                 LEGAL MATTERS
 
    The validity of the shares of PKS Holdings Stock to be distributed in the
Share Exchange and of the Warrants will be passed upon for PKS Holdings and PKS
by Willkie Farr & Gallagher. Certain matters relating to U.S. federal income tax
considerations will be passed upon for PKS by Skadden, Arps, Slate, Meagher &
Flom, L.L.P.
 
                                    EXPERTS
 
    The consolidated financial statements and financial statement schedule of
PKS included in PKS' Annual Report on Form 10-K for the fiscal year ended
December 28, 1996 and incorporated by reference herein and the financial
statements and financial statement schedule of the Construction Group, a
business group of PKS as defined in Note 1 to those financial statements,
included in Exhibit 99.A to PKS' Annual Report on Form 10-K for the fiscal year
ended December 28, 1996 and included herein, have been incorporated and included
herein in reliance on the reports of Coopers & Lybrand L.L.P., independent
accountants, given on the authority of that firm as experts in accounting and
auditing.
 
                                       88
<PAGE>
                             THE CONSTRUCTION GROUP
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                                                                PAGES
                                                                                                                -----
<S>                                                                                                          <C>
Report of Independent Accountants..........................................................................         F-2
 
Financial Statements as of December 28, 1996 and December 30, 1995 and for the three years ended December
  30, 1996:
 
  Statements of Earnings...................................................................................         F-3
  Balance Sheets...........................................................................................         F-4
  Statements of Cash Flows.................................................................................         F-5
  Statements of Changes in Stockholders' Equity............................................................         F-6
  Notes to Financial Statements............................................................................         F-7
 
Financial Statement Schedule for the three years ended December 28, 1996...................................        F-19
 
Condensed Financial Statements as of June 30, 1997 and for the six months ended June 30, 1997 and 1996:
 
  Condensed Statements of Earnings.........................................................................        F-20
  Condensed Balance Sheet..................................................................................        F-21
  Condensed Statements of Cash Flows.......................................................................        F-22
  Notes to Condensed Financial Statements..................................................................        F-23
</TABLE>
 
                                      F-1
<PAGE>
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
The Board of Directors and Stockholders
  Peter Kiewit Sons', Inc.
 
    We have audited the financial statements and the financial statement
schedule of Kiewit Construction & Mining Group, a business group of Peter Kiewit
Sons', Inc. (as defined in Note 1 to these financial statements) as listed in
the index on the preceding page. These financial statements and financial
statement schedule are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements and
financial statement schedule based on our audits.
 
    We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
    In our opinion, the financial statements referred to above, when read in
conjunction with the consolidated financial statements of Peter Kiewit Sons',
Inc. and Subsidiaries, present fairly, in all material respects, the financial
position of Kiewit Construction & Mining Group as of December 28, 1996 and
December 30, 1995, and the results of its operations and its cash flows for each
of the three years in the period ended December 28, 1996 in conformity with
generally accepted accounting principles. In addition, in our opinion, the
financial statement schedule referred to above, when considered in relation to
the basic financial statements taken as a whole, presents fairly, in all
material respects, the information required to be included therein.
 
                                          COOPERS & LYBRAND L.L.P.
 
Omaha, Nebraska
March 14, 1997, except for Note 15, as to
which the date is March 26, 1997.
 
                                      F-2
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                             STATEMENTS OF EARNINGS
 
                  FOR THE THREE YEARS ENDED DECEMBER 28, 1996
 
<TABLE>
<CAPTION>
                                                                                  1996       1995       1994
                                                                                ---------  ---------  ---------
                                                                                     (DOLLARS IN MILLIONS,
                                                                                    EXCEPT PER SHARE DATA)
<S>                                                                             <C>        <C>        <C>
Revenue.......................................................................  $   2,286  $   2,330  $   2,175
Cost of Revenue...............................................................     (2,064)    (2,127)    (1,995)
                                                                                ---------  ---------  ---------
                                                                                      222        203        180
General and Administrative Expenses...........................................       (117)      (116)      (121)
                                                                                ---------  ---------  ---------
Operating Earnings............................................................        105         87         59
Other Income (Expense):
  Investment Income...........................................................         21         17         13
  Interest Expense............................................................         (4)        (2)        (2)
  Other, net..................................................................         58         62         46
                                                                                ---------  ---------  ---------
                                                                                       75         77         57
                                                                                ---------  ---------  ---------
Earnings Before Income Taxes..................................................        180        164        116
Provision for Income Taxes....................................................        (72)       (60)       (39)
                                                                                ---------  ---------  ---------
Net Earnings..................................................................  $     108  $     104  $      77
                                                                                ---------  ---------  ---------
                                                                                ---------  ---------  ---------
Net Earnings Per Common and Common Equivalent Share...........................  $   10.13  $    7.78  $    4.92
                                                                                ---------  ---------  ---------
                                                                                ---------  ---------  ---------
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-3
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                                 BALANCE SHEETS
 
                    DECEMBER 28, 1996 AND DECEMBER 30, 1995
 
<TABLE>
<CAPTION>
                                                                                                 1996       1995
                                                                                               ---------  ---------
                                                                                                   (DOLLARS IN
                                                                                                    MILLIONS)
<S>                                                                                            <C>        <C>
                                                      ASSETS
Current Assets:
  Cash and cash equivalents..................................................................  $     173  $      94
  Marketable securities......................................................................         54         59
  Receivables, less allowance of $17 and $10.................................................        289        319
  Costs and earnings in excess of billings on uncompleted construction contracts.............         80         78
  Investment in construction joint ventures..................................................         91         73
  Deferred income taxes......................................................................         64         61
  Other......................................................................................         13         13
                                                                                               ---------  ---------
Total Current Assets.........................................................................        764        697
Property, Plant and Equipment, at cost:
  Land.......................................................................................         15         16
  Buildings..................................................................................         37         38
  Equipment..................................................................................        542        528
                                                                                               ---------  ---------
                                                                                                     594        582
  Less accumulated depreciation and amortization.............................................       (429)      (421)
                                                                                               ---------  ---------
Net Property, Plant and Equipment............................................................        165        161
Other Assets.................................................................................        107        119
                                                                                               ---------  ---------
                                                                                               $   1,036  $     977
                                                                                               ---------  ---------
                                                                                               ---------  ---------
                                       LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
  Accounts payable, including retainage of $33 and $42.......................................  $     164  $     180
  Short-term borrowings......................................................................     --             45
  Current portion of long-term debt..........................................................     --              2
  Accrued construction costs and billings in excess of revenue on uncompleted contracts......        112        111
  Accrued insurance costs....................................................................         81         79
  Other......................................................................................         33         32
                                                                                               ---------  ---------
Total Current Liabilities....................................................................        390        449
Long-term Debt, less current portion.........................................................         12          9
Other Liabilities............................................................................         72         52
Stockholders' Equity (Redeemable Common Stock, $456 million aggregate redemption value):
  11,006,641 shares outstanding in 1996 and 10,880,369 shares outstanding in 1995
  Common equity..............................................................................        568        471
  Foreign currency adjustment................................................................         (5)        (5)
  Unrealized holding (loss) gain.............................................................         (1)         1
                                                                                               ---------  ---------
Total Stockholders' Equity...................................................................        562        467
                                                                                               ---------  ---------
                                                                                               $   1,036  $     977
                                                                                               ---------  ---------
                                                                                               ---------  ---------
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-4
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                            STATEMENTS OF CASH FLOWS
 
                  FOR THE THREE YEARS ENDED DECEMBER 28, 1996
 
<TABLE>
<CAPTION>
                                                                                            1996       1995       1994
                                                                                          ---------  ---------  ---------
                                                                                               (DOLLARS IN MILLIONS)
<S>                                                                                       <C>        <C>        <C>
Cash flows from operations:
  Net earnings..........................................................................  $     108  $     104  $      77
  Adjustments to reconcile net earnings to net cash provided by operations:
    Depreciation and amortization.......................................................         61         56         52
    Gain on sale of property, plant and equipment and other investments.................        (17)       (33)       (11)
    Equity earnings, net................................................................         (8)        (3)        (2)
    Change in other noncurrent liabilities..............................................         18          6          5
    Deferred income taxes...............................................................         (6)    --             (3)
    Change in working capital items:
      Receivables.......................................................................         37     --            (25)
      Costs and earnings in excess of billings on uncompleted construction contracts....         (1)        23        (26)
      Investment in construction joint ventures.........................................        (18)        (4)        12
      Other current assets..............................................................          2         (3)        (5)
      Accounts payable..................................................................        (18)         3         19
      Accrued construction costs and billings in excess of revenue on uncompleted
        contracts.......................................................................          1          5         19
      Other liabilities.................................................................         11          4         (3)
    Other...............................................................................         (7)        (6)       (17)
                                                                                          ---------  ---------  ---------
Net cash provided by operations.........................................................        163        152         92
Cash flows from investing activities:
  Proceeds from sales and maturities of marketable securities...........................        160         82        176
  Purchases of marketable securities....................................................       (157)       (42)      (151)
  Proceeds from sale of property, plant and equipment...................................         25         15         26
  Capital expenditures..................................................................        (72)       (79)       (76)
  APAC-Arizona, Inc. acquisition........................................................     --         --            (47)
  Sale of note receivable and other.....................................................         14         (2)        (1)
                                                                                          ---------  ---------  ---------
Net cash used in investing activities...................................................  $     (30) $     (26) $     (73)
Cash flows from financing activities:
  Long-term debt borrowings.............................................................  $       3  $       3  $       2
  Short-term debt borrowings, net.......................................................        (45)        45     --
  Payments on long-term debt, including current portion.................................         (2)        (4)        (4)
  Issuances of common stock.............................................................         27         24         20
  Repurchases of common stock...........................................................         (5)        (3)       (11)
  Dividends paid........................................................................        (12)       (13)       (13)
  Exchange of Class C Stock for Class D Stock, net......................................        (20)      (155)       (42)
  Other.................................................................................     --         --              1
                                                                                          ---------  ---------  ---------
Net cash used in financing activities...................................................        (54)      (103)       (47)
Effect of exchange rates on cash........................................................     --              1         (1)
                                                                                          ---------  ---------  ---------
Net change in cash and cash equivalents.................................................         79         24        (29)
Cash and cash equivalents at beginning of year..........................................         94         70         99
                                                                                          ---------  ---------  ---------
Cash and cash equivalents at end of year................................................  $     173  $      94  $      70
                                                                                          ---------  ---------  ---------
                                                                                          ---------  ---------  ---------
Supplemental disclosures of cash flow information:
  Taxes.................................................................................  $      78  $      69  $      49
  Interest..............................................................................          2          2          2
Noncash investing activity:
  Disposition of gold operations in exchange for Kinross common stock, net..............  $  --      $      21  $  --
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-5
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                 STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
 
                  FOR THE THREE YEARS ENDED DECEMBER 28, 1996
 
<TABLE>
<CAPTION>
                                                                                         1996       1995       1994
                                                                                       ---------  ---------  ---------
<S>                                                                                    <C>        <C>        <C>
                                                                                            (DOLLARS IN MILLIONS,
                                                                                           EXCEPT PER SHARE DATA)
Common equity:
Balance at beginning of year.........................................................  $     471  $     513  $     483
  Issuances of stock.................................................................         27         24         20
  Repurchases of stock...............................................................         (5)        (3)       (11)
  Exchange of Class C Stock for Class D Stock, net...................................        (20)      (155)       (42)
  Net earnings.......................................................................        108        104         77
  Dividends (per share: $1.30 in 1996, $1.05 in 1995 and $.90 in 1994)(a)............        (13)       (12)       (14)
                                                                                       ---------  ---------  ---------
Balance at end of year...............................................................        568        471        513
Other equity adjustments:
Balance at beginning of year.........................................................         (4)        (8)        (3)
  Foreign currency adjustment........................................................     --              2         (4)
  Unrealized holding (loss) gain.....................................................         (2)         2         (1)
                                                                                       ---------  ---------  ---------
Balance at end of year...............................................................         (6)        (4)        (8)
                                                                                       ---------  ---------  ---------
Total stockholders' equity...........................................................  $     562  $     467  $     505
                                                                                       ---------  ---------  ---------
                                                                                       ---------  ---------  ---------
</TABLE>
 
- ------------------------
 
(a) Dividends include $.70, $.60, and $.45 for dividends declared in 1996, 1995
    and 1994 but paid in January of the subsequent year.
 
                See accompanying notes to financial statements.
 
                                      F-6
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                         NOTES TO FINANCIAL STATEMENTS
 
(1) BASIS OF PRESENTATION
 
    The Class C Stock and the Class D Stock are designed to provide stockholders
with separate securities reflecting the performance of Peter Kiewit Sons',
Inc.'s ("PKS") construction and materials businesses ("Construction & Mining
Group") and its other businesses ("Diversified Group"), respectively. Dividends
on the Class C Stock are limited to the legally available funds of PKS less the
Class D formula value which is to be reduced by any dividends on Class D Stock
declared during the current year. Subject to this limitation, the Board of
Directors intends to declare and pay dividends on the Class C Stock based
primarily on the Construction & Mining Group's separately reported financial
condition and results of operations.
 
    The financial statements of the Construction & Mining Group include the
financial position, results of operations and cash flows for PKS' construction
and materials businesses held by its wholly-owned subsidiary, Kiewit
Construction Group Inc., and certain PKS corporate assets and liabilities and
related transactions. These financial statements have been prepared using the
historical amounts included in the PKS consolidated financial statements.
 
    Although the financial statements of PKS' Construction & Mining Group and
Diversified Group separately report the assets, liabilities and stockholders'
equity of PKS attributed to each such group, legal title to such assets and
responsibility for such liabilities will not be affected by such attribution.
Holders of Class C Stock and Class D Stock are stockholders of PKS. Accordingly,
the PKS consolidated financial statements and related notes should be read in
conjunction with these financial statements.
 
(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
    PRINCIPLES OF GROUP PRESENTATION
 
    These financial statements include the accounts of the Construction & Mining
Group ("the Group"). The Group's and Diversified Group's financial statements,
taken together, comprise all the accounts included in the PKS consolidated
financial statements. All significant intercompany accounts and transactions,
except those directly between the Group and the Diversified Group, have been
eliminated. Investments in construction joint ventures and other companies in
which the Group exercises significant influence over operating and financial
policies are accounted for by the equity method. The Group accounts for its
share of the operations of the construction joint ventures on a pro rata basis
in the statements of earnings.
 
    The Group invests in the portfolios of the Kiewit Mutual Fund, ("KMF"), a
registered investment company. KMF is not consolidated in the Group's financial
statements.
 
    CONSTRUCTION CONTRACTS
 
    The Group operates generally within the United States and Canada as a
general contractor and engages in various types of construction projects for
both public and private owners. Credit risk is minimal with public (government)
owners since the Group ascertains that funds have been appropriated by the
governmental project owner prior to commencing work on public projects. Most
public contracts are subject to termination at the election of the government.
In the event of termination, the Group is entitled to receive the contract price
on completed work and reimbursement of termination related costs. Credit risk
with private owners is minimized because of statutory mechanics liens, which
give the Group high priority in the event of lien foreclosures following
financial difficulties of private owners.
 
                                      F-7
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
    The construction industry is highly competitive and lacks firms with
dominant market power. A substantial portion of the Group's business involves
construction contracts obtained through competitive bidding. The volume and
profitability of the Group's construction work depends to a significant extent
upon the general state of the economies in which it operates and the volume of
work available to contractors. The Group's construction operations could be
adversely affected by labor stoppages or shortages, adverse weather conditions,
shortages of supplies, or governmental action.
 
    The Group recognizes revenue on long-term construction contracts and joint
ventures on the percentage-of-completion method based upon engineering estimates
of the work performed on individual contracts. Provisions for losses are
recognized on uncompleted contracts when they become known. Claims for
additional revenue are recognized in the period when allowed. It is at least
reasonably possible that engineering estimates of the work performed on
individual contracts will be revised in the near term.
 
    Assets and liabilities arising from construction activities, the operating
cycle of which extends over several years, are classified as current in the
financial statements. A one-year time period is used as the basis for
classification of all other current assets and liabilities.
 
    DEPRECIATION AND AMORTIZATION
 
    Property, plant and equipment are recorded at cost. Depreciation and
amortization are computed on accelerated and straight-line methods.
 
    FOREIGN CURRENCIES
 
    The local currencies of foreign subsidiaries are the functional currencies
for financial reporting purposes. Assets and liabilities are translated into
U.S. dollars at year-end exchange rates. Revenue and expenses are translated
using average exchange rates prevailing during the year. Gains or losses
resulting from currency translation are recorded as adjustments to stockholders'
equity.
 
    EARNINGS PER SHARE
 
    Primary earnings per share of Class C Stock have been computed using the
weighted average number of shares outstanding during each year. The number of
shares used in computing primary earnings per share was 10,655,886 in 1996,
13,384,434 in 1995 and 15,697,724 in 1994. Fully diluted earnings per share have
not been presented because they are not significantly different from primary
earnings per share.
 
    INCOME TAXES
 
    Deferred income taxes are provided for the temporary differences between the
financial reporting basis and tax basis of the Group's assets and liabilities
using enacted tax rates in effect for the year in which the differences are
expected to reverse.
 
    USE OF ESTIMATES
 
    The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the
 
                                      F-8
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
reported amounts of revenues and expenses during the reporting period. Actual
results could differ from those estimates.
 
    RECLASSIFICATIONS
 
    Where appropriate, items within the financial statements and notes thereto
have been reclassified from previous years to conform to current year
presentation.
 
    FISCAL YEAR
 
    The Group's fiscal year ends on the last Saturday in December. There were 52
weeks in fiscal years 1996 and 1995 and 53 weeks in fiscal 1994.
 
(3) CORPORATE ACTIVITIES
 
    FINANCIAL STRUCTURE
 
    PKS, in addition to specifically attributable items, has corporate assets,
liabilities and related income and expense which are not separately identified
with the ongoing operations of the Group or the Diversified Group. The items
attributable to the Group and the Group's 50% portion of PKS are as follows:
 
<TABLE>
<CAPTION>
                                                                                                      1996         1995
                                                                                                      -----        -----
<S>                                                                                                <C>          <C>
                                                                                                    (DOLLARS IN MILLIONS)
Cash and cash equivalents........................................................................   $       8    $       4
Marketable securities............................................................................           5           10
Property, plant and equipment, net...............................................................           5            5
Other assets.....................................................................................           1            2
                                                                                                          ---          ---
  Total Assets...................................................................................   $      19    $      21
                                                                                                          ---          ---
                                                                                                          ---          ---
Accounts payable.................................................................................   $       8    $       8
Long-term debt, including current portion........................................................          12           11
                                                                                                          ---          ---
  Total Liabilities..............................................................................   $      20    $      19
                                                                                                          ---          ---
                                                                                                          ---          ---
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                            1996       1995        1994
                                                                                          ---------  ---------     -----
<S>                                                                                       <C>        <C>        <C>
Net investment income...................................................................  $  --      $  --       $       6
Other expense...........................................................................     --         --              (1)
</TABLE>
 
    CORPORATE GENERAL AND ADMINISTRATIVE COSTS
 
    A portion of PKS' corporate general and administrative costs has been
allocated to the Group based upon certain measures of business activity, such as
employment, investments and sales, which management believes to be reasonable.
The allocations were $1 million in 1996 and 1995 and $21 million in 1994. Due to
a realignment of the corporate overhead departments at the beginning of 1995,
substantially all of the administrative functions and personnel previously
allocated to the Group are now located at the Group.
 
                                      F-9
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(3) CORPORATE ACTIVITIES (CONTINUED)
    INCOME TAXES
 
    All domestic members of the PKS affiliated group are included in the
consolidated U.S. income tax return filed by PKS as allowed by the Internal
Revenue Code. Accordingly, the provision for income taxes and the related
payments or refunds of tax are determined on a consolidated basis.
 
    The financial statement provision and actual cash tax payments have been
reflected in the Group's and the Diversified Group's financial statements in
accordance with PKS' tax allocation policy for such groups. In general, such
policy provides that the consolidated tax provision and related cash flows and
balance sheet amounts are allocated between the Group and the Diversified Group,
for group financial statement purposes, based principally upon the financial
income, taxable income, credits, preferences and other amounts directly related
to the respective groups. The provision for estimated United States income taxes
for the Group does not differ materially from that which would have been
determined on a separate return basis.
 
(4) DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS
 
    The following methods and assumptions were used to determine classification
and fair values of financial instruments:
 
    CASH AND CASH EQUIVALENTS
 
    Cash equivalents generally consist of funds invested in the Kiewit Mutual
Fund-Money Market Portfolio and highly liquid instruments purchased with an
original maturity of three months or less. The securities are stated at cost,
which approximates fair value.
 
    MARKETABLE SECURITIES AND NON-CURRENT INVESTMENTS
 
    The Group has classified all marketable securities and marketable
non-current investments not accounted for under the equity method as
available-for-sale. The amortized cost of the securities used in computing
unrealized and realized gains and losses is determined by specific
identification. Fair values are estimated based on quoted market prices for the
securities on hand or for similar investments. Net unrealized holding gains and
losses are reported as a separate component of stockholders' equity, net of tax.
 
                                      F-10
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(4) DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS (CONTINUED)
    The following summarizes the amortized cost, unrealized holding gains and
losses, and estimated fair values of marketable securities and marketable
non-current investments at December 28, 1996 and December 30, 1995.
 
<TABLE>
<CAPTION>
                                                                                      UNREALIZED     UNREALIZED
                                                                         AMORTIZED      HOLDING        HOLDING        FAIR
                                                                           COST          GAINS         LOSSES         VALUE
                                                                        -----------  -------------  -------------     -----
<S>                                                                     <C>          <C>            <C>            <C>
                                                                                        (DOLLARS IN MILLIONS)
1996
Kiewit Mutual Fund:
  Short-term government...............................................   $      22     $  --          $  --         $      22
  Intermediate term bond..............................................          10        --             --                10
  Tax exempt..........................................................           9        --             --                 9
U.S. debt securities..................................................          13        --             --                13
                                                                             -----           ---            ---           ---
                                                                         $      54     $  --          $  --         $      54
                                                                             -----           ---            ---           ---
                                                                             -----           ---            ---           ---
Non-current investments:
  Equity securities...................................................   $      30     $  --          $      (2)    $      28
                                                                             -----           ---            ---           ---
                                                                             -----           ---            ---           ---
1995
Kiewit Mutual Fund:
  Short-term government...............................................   $      22     $  --          $  --         $      22
  Intermediate term bond..............................................          13             1         --                14
  Tax exempt..........................................................           8             1         --                 9
U.S. debt securities..................................................          13        --             --                13
Municipal debt securities.............................................           1        --             --                 1
                                                                             -----           ---            ---           ---
                                                                         $      57     $       2      $  --         $      59
                                                                             -----           ---            ---           ---
                                                                             -----           ---            ---           ---
Non-current investments:
  Equity securities...................................................   $      30     $  --          $  --         $      30
                                                                             -----           ---            ---           ---
                                                                             -----           ---            ---           ---
</TABLE>
 
    For debt securities, amortized costs do not vary significantly from
principal amounts. Realized gains and losses on sales of marketable securities
were each less than $1 million in 1995 and 1996, and $1 million and $2 million
in 1994.
 
    The contractual maturities of the debt securities are as follows:
 
<TABLE>
<CAPTION>
                                                                                         AMORTIZED COST     FAIR VALUE
                                                                                        -----------------  -------------
<S>                                                                                     <C>                <C>
U.S. debt securities:
  less than 1 year....................................................................      $       2        $       2
  1-5 years...........................................................................             11               11
                                                                                                  ---              ---
                                                                                            $      13        $      13
                                                                                                  ---              ---
                                                                                                  ---              ---
</TABLE>
 
    Maturities for the mutual fund and equity securities have not been presented
as they do not have a single maturity date.
 
                                      F-11
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(4) DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS (CONTINUED)
    LONG-TERM DEBT
 
    The fair value of debt was estimated using the incremental borrowing rates
of the Group for debt of the same remaining maturities and approximates the
carrying amount.
 
(5) RETAINAGE ON CONSTRUCTION CONTRACTS
 
    Receivables at December 28, 1996 and December 30, 1995 include approximately
$86 million and $50 million of retainage on uncompleted projects, the majority
of which is expected to be collected within one year. Included in the retainage
amounts are $53 million and $61 million of securities which are being held by
the owners of various construction projects in lieu of retainage. These
securities are carried at fair value which is determined based on quoted market
prices for the securities on hand or for similar investments. Net unrealized
holding gains and losses, if any, are reported as a separate component of
stockholders' equity, net of tax.
 
(6) INVESTMENT IN CONSTRUCTION JOINT VENTURES
 
    The Group has entered into a number of construction joint venture
arrangements. Under these arrangements, if one venturer is financially unable to
bear its share of the costs, the other venturers will be required to pay those
costs.
 
    Summary joint venture financial information follows:
 
<TABLE>
<CAPTION>
                                     FINANCIAL POSITION                                         1996       1995
                                     ------------------                                       ---------  ---------
<S>                                                                                           <C>        <C>
                                                                                                  (DOLLARS IN
                                                                                                   MILLIONS)
Total Joint Ventures
  Current assets............................................................................  $     435  $     655
  Other assets (principally construction equipment).........................................         47         52
                                                                                              ---------  ---------
                                                                                                    482        707
  Current liabilities.......................................................................       (347)      (584)
                                                                                              ---------  ---------
    Net assets..............................................................................  $     135  $     123
                                                                                              ---------  ---------
                                                                                              ---------  ---------
Group's Share
  Equity in net assets......................................................................  $      73  $      67
  Receivable from joint ventures............................................................         18          6
                                                                                              ---------  ---------
    Investment in construction joint ventures...............................................  $      91  $      73
                                                                                              ---------  ---------
                                                                                              ---------  ---------
</TABLE>
 
                                      F-12
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(6) INVESTMENT IN CONSTRUCTION JOINT VENTURES (CONTINUED)
 
<TABLE>
<CAPTION>
                                   OPERATIONS                                       1996       1995       1994
                                  -----------                                     ---------  ---------  ---------
<S>                                                                               <C>        <C>        <C>
                                                                                       (DOLLARS IN MILLIONS)
Total Joint Ventures
  Revenue.......................................................................  $   1,370  $   1,211  $   1,034
  Costs.........................................................................      1,201      1,108        937
                                                                                  ---------  ---------  ---------
    Operating income............................................................  $     169  $     103  $      97
                                                                                  ---------  ---------  ---------
Group's Share
  Revenue.......................................................................  $     689  $     691  $     523
  Costs.........................................................................        621        625        473
                                                                                  ---------  ---------  ---------
    Operating income............................................................  $      68  $      66  $      50
                                                                                  ---------  ---------  ---------
                                                                                  ---------  ---------  ---------
</TABLE>
 
(7) OTHER ASSETS
 
    Other assets consist of the following at December 28, 1996 and December 30,
1995:
 
<TABLE>
<CAPTION>
                                                                                                   1996       1995
                                                                                                 ---------  ---------
<S>                                                                                              <C>        <C>
                                                                                                     (DOLLARS IN
                                                                                                      MILLIONS)
ME Holding Inc.................................................................................  $      33  $      29
Equity securities of Kinross Gold Corporation (Note 4).........................................         28         30
Investment in partnership......................................................................         15         12
APAC goodwill..................................................................................         15         16
Notes receivable...............................................................................          1         24
Other..........................................................................................         15          8
                                                                                                 ---------  ---------
                                                                                                 $     107  $     119
                                                                                                 ---------  ---------
                                                                                                 ---------  ---------
</TABLE>
 
    Other assets include marketable equity securities classified as non-current,
an equity method investment in a partnership which fabricates offshore oil
platforms and the net goodwill recognized in the APAC acquisition. The
investment in ME Holding Inc., accounted for on the equity method, totals $33
million, $2 million in excess of the Group's share of equity. The excess
investment is being amortized over 15 years. The contracting business is not
publicly traded and does not have a readily determinable market value. The Group
is committed to acquire 80% ownership in 1997. The Group's share of ME Holding's
income, net of goodwill amortization, was $4 million, $2 million and $1 million
in 1996, 1995 and 1994.
 
                                      F-13
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                         NOTES TO FINANCIAL STATEMENTS
 
(8) LONG-TERM DEBT
 
    At December 28, 1996 and December 30, 1995, long-term debt consisting of a
portion of PKS' notes to former stockholders which have been allocated to the
Group and the Diversified Group and convertible debentures is as follows:
 
<TABLE>
<CAPTION>
(DOLLARS IN MILLIONS)                                                                          1996         1995
- ------------------------------------------------------------------------------------------     -----        -----
<S>                                                                                         <C>          <C>
9.6%-11.1% Notes to former stockholders, 1999-2001........................................   $       2    $       3
6.25%-8.75% Convertible debentures, 2002-2006.............................................          10            8
                                                                                                   ---          ---
                                                                                                    12           11
Less current portion......................................................................      --               (2)
                                                                                                   ---          ---
                                                                                             $      12    $       9
                                                                                                   ---          ---
                                                                                                   ---          ---
</TABLE>
 
    The convertible debentures are convertible during October of the fifth year
preceding their maturity date. Each annual series may be redeemed in its
entirety prior to the due date except during the conversion period. Debentures
were converted into 59,935 and 12,594 shares of Class C Stock in 1995 and 1994,
respectively. As part of the exchange offer completed prior to the MFS Spin-off,
all holders of 1990 and 1991 debentures converted their debentures into Class C
Stock and Class D Stock. At December 28, 1996, 436,833 shares of Class C Stock
are reserved for future conversions.
 
    Scheduled maturities of long-term debt through 2001 are as follows (in
millions): 1997--$-; 1998--$-; 1999--$1; 2000--$1 and $- in 2001.
 
(9) INCOME TAXES
 
    An analysis of the (provision) benefit for income taxes relating to earnings
for the three years ended December 28, 1996 follows:
 
<TABLE>
<CAPTION>
(DOLLARS IN MILLIONS)                                                                1996       1995       1994
- ---------------------------------------------------------------------------------  ---------  ---------  ---------
<S>                                                                                <C>        <C>        <C>
Current:
  U.S. federal...................................................................  $     (62) $     (58) $     (33)
  Foreign........................................................................         (5)         4         (8)
  State..........................................................................        (11)        (6)        (1)
                                                                                         ---        ---        ---
                                                                                         (78)       (60)       (42)
Deferred:
  U.S. federal...................................................................          7          6     --
  Foreign........................................................................         (3)        (7)         1
  State..........................................................................          2          1          2
                                                                                         ---        ---        ---
                                                                                           6     --              3
                                                                                         ---        ---        ---
                                                                                   $     (72) $     (60) $     (39)
                                                                                         ---        ---        ---
                                                                                         ---        ---        ---
</TABLE>
 
                                      F-14
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(9) INCOME TAXES (CONTINUED)
    The United States and foreign components of earnings, for tax reporting
purposes, before income taxes follows:
 
<TABLE>
<CAPTION>
(DOLLARS IN MILLIONS)                                                               1996       1995       1994
- --------------------------------------------------------------------------------  ---------  ---------  ---------
<S>                                                                               <C>        <C>        <C>
United States...................................................................  $     155  $     159  $     101
Foreign.........................................................................         25          5         15
                                                                                  ---------  ---------  ---------
                                                                                  $     180  $     164  $     116
                                                                                  ---------  ---------  ---------
                                                                                  ---------  ---------  ---------
</TABLE>
 
    A reconciliation of the actual (provision) benefit for income taxes and the
tax computed by applying the U.S. federal rate (35%) to the earnings before
income taxes for the three years ended December 28, 1996 follows:
 
<TABLE>
<CAPTION>
(DOLLARS IN MILLIONS)                                                                1996       1995       1994
- ---------------------------------------------------------------------------------  ---------  ---------  ---------
<S>                                                                                <C>        <C>        <C>
Computed tax at statutory rate...................................................  $     (63) $     (57) $     (41)
State income taxes...............................................................         (6)        (8)        (3)
Prior year tax adjustments.......................................................         (4)         5          3
Other............................................................................          1     --              2
                                                                                         ---        ---        ---
                                                                                   $     (72) $     (60) $     (39)
                                                                                         ---        ---        ---
                                                                                         ---        ---        ---
</TABLE>
 
    Possible taxes, beyond those provided, on remittances of undistributed
earnings of foreign subsidiaries, are not expected to be material.
 
    The components of the net deferred tax assets for the years ended December
28, 1996 and December 30, 1995 were as follows:
 
<TABLE>
<CAPTION>
(DOLLARS IN MILLIONS)                                                                          1996         1995
- ------------------------------------------------------------------------------------------     -----        -----
<S>                                                                                         <C>          <C>
Deferred tax assets:
  Construction accounting.................................................................   $      15    $       3
  Investments in construction joint ventures..............................................          30           28
  Insurance claims........................................................................          32           32
  Compensation--retirement benefits.......................................................           6            4
  Other...................................................................................          10            7
                                                                                                   ---          ---
Total deferred tax assets.................................................................          93           74
 
Deferred tax liabilities:
  Investments in securities...............................................................           7            8
  Other...................................................................................          20            7
                                                                                                   ---          ---
Total deferred tax liabilities............................................................          27           15
                                                                                                   ---          ---
 
Net deferred tax assets...................................................................   $      66    $      59
                                                                                                   ---          ---
                                                                                                   ---          ---
</TABLE>
 
    No valuation allowance has been recorded relating to the deferred tax assets
because they are realizable under the tax sharing policy of PKS.
 
                                      F-15
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(10) EMPLOYEE BENEFIT PLANS
 
    The Group makes contributions, based on collective bargaining agreements
related to its construction operations, to several multi-employer union pension
plans. These contributions are included in the cost of revenue. Under federal
law, the Group may be liable for a portion of future plan deficiencies; however,
there are no known deficiencies.
 
    The Group also had a long-term incentive plan, stock appreciation rights,
for certain employees. The plan concluded in 1994. The expense related to this
plan was $1 million in 1994. Substantially all employees of the Group are
covered under the Group's profit sharing plans. The expense related to these
plans was $3 million in 1996 and 1995 and $1 million in 1994.
 
(11) STOCKHOLDERS' EQUITY
 
    Ownership of the Class C Stock is restricted to certain employees
conditioned upon the execution of repurchase agreements which restrict the
employees from transferring the stock. PKS is generally committed to purchase
all Class C Stock at the amount computed pursuant to the Certificate of
Incorporation. Issuances and repurchases of common shares, including
conversions, for the three years ended December 28, 1996 were as follows:
 
<TABLE>
<CAPTION>
                                                                                              CLASS C
                                                                                               STOCK
                                                                                             ----------
<S>                                                                                          <C>
Shares issued in 1994......................................................................   1,018,144
Shares repurchased in 1994.................................................................   2,427,186
Shares issued in 1995......................................................................   1,021,875
Shares repurchased in 1995.................................................................   6,228,934
Shares issued in 1996......................................................................     896,640
Shares repurchased in 1996.................................................................     770,368
</TABLE>
 
                                      F-16
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(12) INDUSTRY AND GEOGRAPHIC DATA
 
    The Group's operations are primarily conducted in one business segment;
construction contracting. The following is derived from geographic information
in the PKS consolidated financial statements as it relates to the Group.
 
<TABLE>
<CAPTION>
GEOGRAPHIC DATA (DOLLARS IN MILLIONS)                                                    1996       1995       1994
- -------------------------------------------------------------------------------------  ---------  ---------  ---------
<S>                                                                                    <C>        <C>        <C>
Revenue:
  United States......................................................................  $   2,000  $   2,007  $   1,915
  Canada.............................................................................        175        237        214
  Other..............................................................................        111         86         46
                                                                                       ---------  ---------  ---------
                                                                                       $   2,286  $   2,330  $   2,175
                                                                                       ---------  ---------  ---------
                                                                                       ---------  ---------  ---------
 
Operating earnings:
  United States......................................................................  $      84  $      70  $      45
  Canada.............................................................................          7          7         14
  Other..............................................................................         14         10     --
                                                                                       ---------  ---------  ---------
                                                                                       $     105  $      87  $      59
                                                                                       ---------  ---------  ---------
                                                                                       ---------  ---------  ---------
 
Identifiable assets:
  United States......................................................................  $     924  $     867  $     834
  Canada.............................................................................         90         90        102
  Other..............................................................................         22         20         27
                                                                                       ---------  ---------  ---------
                                                                                       $   1,036  $     977  $     963
                                                                                       ---------  ---------  ---------
                                                                                       ---------  ---------  ---------
</TABLE>
 
(13) RELATED PARTY TRANSACTION
 
    The Group performs certain mine management services for the Diversified
Group. The income from these services was $37 million in 1996, $30 million in
1995 and $29 million in 1994 and is recorded in other income in the statements
of earnings.
 
(14) OTHER MATTERS
 
    In October 1996, the PKS Board of Directors directed management to pursue a
listing of PKS Class D Stock on a major securities exchange or the Nasdaq
National Market as soon as practical during 1998. The Board does not foresee
circumstances under which PKS would list the Class D Stock prior to 1998. The
Board believes that a listing will provide PKS with a capital structure more
suitable for the further development of the Diversified Group's business plan.
It would also provide liquidity for Class D shareholders without impairing PKS'
capital base.
 
    The Board's action does not ensure that a listing of Class D Stock will
occur in 1998, or any time. The Board could delay or abandon plans to list the
stock if it determined that such action would be in the best interests of all
PKS' shareholders. In addition, PKS' ability to list Class D Stock will be
subject to factors beyond its control, including the laws, regulations, and
listing eligibility criteria in effect at the time a listing is sought, as well
as stock market conditions at the time. Furthermore, the Board might decide to
couple the listing of Class D Stock with a public offering of newly issued Class
D shares in order to raise additional capital for the Diversified Group. Such an
offering could delay or alter the listing plan.
 
                                      F-17
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
(14) OTHER MATTERS (CONTINUED)
    Class C shareholders are currently able to convert their shares into Class D
Stock pursuant to PKS' Certificate of Incorporation. If such a listing occurs,
Class C shareholders will continue to be able to convert their shares to Class D
Stock.
 
    In June 1995, the Group exchanged its interest in a wholly owned subsidiary
involved in gold mining activities for 4,000,000 common shares of Kinross Gold
Corporation, a publicly traded corporation. The Group recognized a $21 million
pre-tax gain on the exchange based on the difference between the book value of
the subsidiary and the fair market value of the Kinross stock on the date of the
transaction.
 
    In September 1995, the PKS Board of Directors approved a plan to make a
tax-free distribution of its entire ownership interest in MFS Communications
Company, Inc. to the Class D stockholders (the "Spin-off") effective September
30, 1995.
 
    PKS completed an exchange offer prior to the Spin-off whereby 4,000,000
shares of Class C Stock were exchanged for 1,666,384 shares of Class D Stock on
terms similar to those upon which Class C Stock can be converted into Class D
Stock during the annual conversion period provided for in PKS' Certificate of
Incorporation. The conversion ratio used in the exchange was calculated using
final 1994 stock prices adjusted for 1995 dividends.
 
    The Group is involved in various lawsuits and claims incidental to its
business. Management believes that any resulting liability, beyond that
provided, should not materially affect the Group's financial position, future
results of operations or future cash flows.
 
    The Group leases various buildings and equipment under both operating and
capital leases. Minimum rental payments on buildings and equipment subject to
noncancellable operating leases during the next 24 years aggregate $10 million.
 
    It is customary in the Group's industry to use various financial instruments
in the normal course of business. These instruments include items such as
letters of credit. Letters of credit are conditional commitments issued on
behalf of the Group in accordance with specified terms and conditions. The Group
has informal arrangements with a number of banks to provide such commitments. As
of December 28, 1996, the Group had outstanding letters of credit of
approximately $101 million.
 
(15) SUBSEQUENT EVENTS
 
    In January 1997, approximately 1.7 million shares of Class C Stock, with a
redemption value of $71 million, were converted into approximately 1.3 million
shares of Class D Stock.
 
    On March 26, 1997, a Group-sponsored joint venture was awarded a $1.3
billion contract to reconstruct Interstate I-15 through the Salt Lake City
region. The project is being undertaken in preparation for the 2002 Olympic
Games. The Group's share of this project is approximately $700 million.
 
                                      F-18
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
                 VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
 
<TABLE>
<CAPTION>
                                                                                 ADDITIONS       AMOUNTS
                                                                  BALANCE       CHARGED TO       CHARGED                   BALANCE
                                                                 BEGINNING       COSTS AND         TO                      END OF
(DOLLARS IN MILLIONS)                                            OF PERIOD       EXPENSES       RESERVES       OTHER       PERIOD
- -------------------------------------------------------------  -------------  ---------------  -----------  -----------  -----------
<S>                                                            <C>            <C>              <C>          <C>          <C>
 
Year ended December 28, 1996
Allowance for doubtful trade accounts........................    $      10       $      12      $      (5)   $  --        $      17
 
Reserves:
  Insurance claims...........................................           79              22            (20)      --               81
 
Year ended December 30, 1995
Allowance for doubtful trade accounts........................    $       7       $       5      $      (2)   $  --        $      10
 
Reserves:
  Insurance claims...........................................           73              18            (14)           2           79
 
Year ended December 31, 1994
Allowance for doubtful trade accounts........................    $       5       $       4      $      (2)   $  --        $       7
 
Reserves:
  Insurance claims...........................................           65              19            (11)      --               73
</TABLE>
 
                                      F-19
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                        CONDENSED STATEMENTS OF EARNINGS
<TABLE>
<CAPTION>
                                                                                                SIX MONTHS ENDED
                                                                                                    JUNE 30,
                                                                                              --------------------
<S>                                                                                           <C>        <C>
                                                                                                1997       1996
                                                                                              ---------  ---------
 
<CAPTION>
                                                                                                  (UNAUDITED)
                                                                                                  (DOLLARS IN
                                                                                              MILLIONS, EXCEPT PER
                                                                                                  SHARE DATA)
<S>                                                                                           <C>        <C>
Revenue.....................................................................................  $   1,047  $   1,072
Cost of Revenue.............................................................................       (942)      (989)
                                                                                              ---------  ---------
                                                                                                    105         83
General and Administrative Expenses.........................................................        (64)       (59)
                                                                                              ---------  ---------
Operating Earnings..........................................................................         41         24
Other Income (Expense):
  Investment Income, net....................................................................          8          8
  Interest Expense, net.....................................................................         (1)        (2)
  Other, net................................................................................         35         29
                                                                                              ---------  ---------
                                                                                                     42         35
                                                                                              ---------  ---------
Earnings Before Income Taxes................................................................         83         59
Provision for Income Taxes..................................................................        (33)       (23)
                                                                                              ---------  ---------
Net Earnings................................................................................  $      50  $      36
                                                                                              ---------  ---------
                                                                                              ---------  ---------
Primary Earnings per Share..................................................................  $    5.34  $    3.46
                                                                                              ---------  ---------
                                                                                              ---------  ---------
Fully Diluted Earnings per Share............................................................  $    5.13  $    3.36
                                                                                              ---------  ---------
                                                                                              ---------  ---------
</TABLE>
 
           See accompanying notes to condensed financial statements.
 
                                      F-20
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
                            CONDENSED BALANCE SHEET
 
<TABLE>
<CAPTION>
                                                                                                   JUNE 30,
                                                                                                     1997
                                                                                            -----------------------
<S>                                                                                         <C>
                                                                                                  (UNAUDITED)
                                                                                             (DOLLARS IN MILLIONS)
                                                      ASSETS
Current Assets:
Cash and cash equivalents.................................................................         $     127
Marketable securities.....................................................................                33
Receivables, less allowance of $15........................................................               336
Costs and earnings in excess of billings on uncompleted contracts.........................                95
Investment in construction joint ventures.................................................               113
Recoverable income taxes..................................................................                18
Deferred income taxes.....................................................................                69
Other.....................................................................................                16
                                                                                                      ------
Total Current Assets......................................................................               807
 
Property, Plant and Equipment, less accumulated depreciation and amortization of $426.....               201
Investments...............................................................................                87
Other Assets..............................................................................                22
                                                                                                      ------
                                                                                                   $   1,117
                                                                                                      ------
                                                                                                      ------
                                       LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
Accounts payable, including retainage of $35..............................................         $     173
Current portion of long-term debt.........................................................                 2
Accrued construction costs and billings in excess of revenue on uncompleted contracts.....               180
Accrued insurance costs...................................................................                85
Other.....................................................................................                43
                                                                                                      ------
Total Current Liabilities.................................................................               483
 
Long-Term Debt, less current portion......................................................                16
Other Liabilities.........................................................................                59
 
Stockholders' Equity (Redeemable common stock, $404 million aggregate redemption value):
Common equity.............................................................................               572
Net unrealized holding loss...............................................................                (7)
Foreign currency adjustment...............................................................                (6)
                                                                                                      ------
Total Stockholders' Equity................................................................               559
                                                                                                      ------
                                                                                                   $   1,117
                                                                                                      ------
                                                                                                      ------
</TABLE>
 
           See accompanying notes to condensed financial statements.
 
                                      F-21
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                       CONDENSED STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
                                                                                                    SIX MONTHS ENDED
                                                                                                        JUNE 30,
                                                                                                 ----------------------
<S>                                                                                              <C>        <C>
                                                                                                   1997        1996
                                                                                                 ---------     -----
 
<CAPTION>
                                                                                                      (UNAUDITED)
                                                                                                 (DOLLARS IN MILLIONS)
<S>                                                                                              <C>        <C>
Cash flows from operations:
  Net cash provided by operations..............................................................  $      37   $      73
 
Cash flows from investing activities:
  Proceeds from sales and maturities of marketable securities..................................         44          67
  Purchases of marketable securities...........................................................        (22)        (57)
  Proceeds from sales of property, plant and equipment.........................................         25          16
  Acquisitions and investments, net............................................................        (18)         (3)
  Capital expenditures.........................................................................        (62)        (36)
                                                                                                 ---------         ---
    Net cash used in investing activities......................................................        (33)        (13)
 
Cash flows from financing activities:
  Proceeds from long-term debt borrowings......................................................          2      --
  Payments on long-term debt, including current portion........................................     --              (2)
  Net change in short-term borrowings..........................................................     --             (45)
  Issuance of common stock.....................................................................         34          27
  Repurchases of common stock..................................................................         (1)         (4)
  Dividends paid...............................................................................        (13)        (12)
  Exchange of Class B&C Stock for Class D Stock, net...........................................        (72)        (19)
                                                                                                 ---------         ---
    Net cash used in financing activities......................................................        (50)        (55)
                                                                                                 ---------         ---
    Net change in cash and cash equivalents....................................................        (46)          5
Cash and cash equivalents at beginning of period...............................................        173          94
                                                                                                 ---------         ---
Cash and cash equivalents at end of period.....................................................  $     127   $      99
                                                                                                 ---------         ---
                                                                                                 ---------         ---
</TABLE>
 
           See accompanying notes to condensed financial statements.
 
                                      F-22
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                    NOTES TO CONDENSED FINANCIAL STATEMENTS
 
1. BASIS OF PRESENTATION:
 
    The financial statements contained herein are unaudited and have been
prepared using the historical amounts included in the Peter Kiewit Sons', Inc.
("PKS") consolidated condensed financial statements. The Group's accounting
policies and certain other disclosures are set forth in the notes to the
financial statements contained in PKS' Annual Report on Form 10-K as an exhibit
for the year ended December 28, 1996.
 
    Although the financial statements of PKS' Construction & Mining Group and
Diversified Group separately report the assets, liabilities and stockholders'
equity of PKS attributed to each such group, legal title to such assets and
responsibility for such liabilities will not be affected by such attribution.
Holders of Class C Stock and Class D Stock are stockholders of PKS. Accordingly,
the PKS consolidated condensed financial statements and related notes as well as
those of the Kiewit Diversified Group should be read in conjunction with these
financial statements.
 
    Receivables at June 30, 1997 include approximately $72 million of retainage
on uncompleted projects, the majority of which is expected to be collected
within one year. Included in the retainage amount is $32 million of securities
which are being held by owners of various construction projects in lieu of
retainage.
 
    The results of operations for the six months ended June 30, 1997 are not
necessarily indicative of the results to be expected for the full year.
 
    Where appropriate, items within the condensed financial statements have been
reclassified from the previous periods to conform to current year presentation.
 
2. EARNINGS PER SHARE:
 
    Primary earnings per share of common stock have been computed using the
weighted average number of shares outstanding during each period. In addition,
fully diluted earnings per share reflect the dilutive effect of convertible
debentures. The numbers of shares used in computing earnings per share were as
follows:
 
<TABLE>
<CAPTION>
                                                                         SIX MONTHS ENDED
                                                                             JUNE 30,
                                                                     ------------------------
<S>                                                                  <C>         <C>
                                                                        1997         1996
                                                                     ----------  ------------
Primary............................................................   9,301,036    10,353,305
Fully Diluted......................................................   9,737,869    10,712,305
</TABLE>
 
    In March 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards ("SFAS") No. 128 "Earnings Per Share". The
statement establishes standards for computing and presenting earnings per share
and requires the restatement of prior period earnings per share data presented.
This statement is effective for financial statements issued for periods ending
after December 15, 1997 and earlier application is not permitted. Basic and
diluted earnings per share, as defined in SFAS No. 128, are not expected to vary
significantly from the primary and fully diluted earnings per share shown on the
statements of earnings.
 
                                      F-23
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
              NOTES TO CONDENSED FINANCIAL STATEMENTS (CONTINUED)
 
3. SUMMARIZED FINANCIAL INFORMATION:
 
    The Group's 50% portion of PKS' corporate assets and liabilities and related
transactions, which are not separately identified with the ongoing operations of
the Construction & Mining Group or the Diversified Group, and items attributable
to the Group are as follows:
 
<TABLE>
<CAPTION>
                                                                                  JUNE 30,
(DOLLARS IN MILLIONS)                                                               1997
- --------------------------------------------------------------------------  ---------------------
<S>                                                                         <C>
Cash and marketable securities............................................        $      11
Property, plant and equipment, net........................................                5
Other assets..............................................................                2
                                                                                        ---
  Total Assets............................................................        $      18
                                                                                        ---
                                                                                        ---
Accounts payable..........................................................        $       2
Long-term debt, including current portion.................................               11
                                                                                        ---
  Total Liabilities.......................................................        $      13
                                                                                        ---
                                                                                        ---
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                   SIX MONTHS ENDED
                                                                                       JUNE 30,
                                                                               ------------------------
<S>                                                                            <C>          <C>
                                                                                  1997         1996
                                                                                  -----        -----
Other expense, net...........................................................   $      (1)   $      (1)
</TABLE>
 
    Corporate general and administrative costs have been allocated to the Group.
These allocations were less than $1 million for the six months ended June 30,
1997 and 1996.
 
    Mine management income from the Diversified Group was $16 million and $15
million for the six months ended June 30, 1997 and 1996.
 
4. ACQUISITIONS:
 
    On April 18, 1997, the Group and a partner each invested $15 million to
acquire a 96% interest in Oak Mountain Energy L.L.C. ("Oak Mountain"). Oak
Mountain then acquired the existing assets of an underground coal mine in
Alabama for approximately $18 million and assumed approximately $14 million of
related liabilities. Oak Mountain intends to use the remaining cash and $30
million of nonrecourse bank borrowings to retire the existing debt and further
develop and modernize the mine. Oak Mountain's results are consolidated with
those of the Group on a pro-rata basis since the date of acquisition. The coal
mine's results of operations prior to the acquisition were not significant
relative to the Group's results.
 
5. OTHER MATTERS:
 
    In October 1996, the PKS Board of Directors (the "Board") directed
management to pursue a listing of Class D Stock as a way to address certain
issues created by the PKS' two-class capital stock structure and the need to
attract and retain the best management for the PKS' businesses. During the
course of its examination of the consequences of a listing of Class D Stock,
management concluded that a listing of Class D Stock would not adequately
address these issues, and instead began to study a separation of the
Construction and Mining Group and the Diversified Group. At the regular meeting
of the Board on July 23, 1997, management submitted to the Board for
consideration a proposal for separation of the
 
                                      F-24
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
              NOTES TO CONDENSED FINANCIAL STATEMENTS (CONTINUED)
 
5. OTHER MATTERS: (CONTINUED)
Construction and Mining Group and the Diversified Group on substantially the
terms eventually approved by the Board. At a special meeting on August 14, 1997,
the Board approved management's proposal.
 
    The separation of the Construction and Mining Group and the Diversified
Group would be contingent upon the ratification of the separation by a majority
of both Class C and Class D shareholders present at a shareholders meeting and
the recepit by PKS of an Internal Revenue Service ruling or other assurance
acceptable to the Board that the separation would be tax-free to U.S.
shareholders. The restructuring is currently anticipated to occur during the
second quarter of 1998. Under management's proposal, the Diversified Group will
not seek to list its stock for public trading on a national securities exchange
until it raises capital through a public equity offering or desires to have a
listed equity security available for acquisitions. The Board will retain the
right, even if the stockholders ratify the proposal and favorable tax treatment
is satisfied, to abandon, defer or modify the proposal if it believes that it
would be in the best interests of all stockholders.
 
    The Group is involved in various lawsuits, claims and regulatory proceedings
incidential to its business. Management believes that any resulting liability,
beyond that provided, should not materially affect the Group's financial
position, future results of operations or future cash flows.
 
                                      F-25
<PAGE>
                         INDEX TO PRO FORMA INFORMATION
 
<TABLE>
<S>                                                                                    <C>
Report of Independent Accountants for Peter Kiewit Sons', Inc. and Subsidiaries......       F-28
 
Peter Kiewit Sons', Inc. and Subsidiaries Pro Forma Consolidated Condensed Statements
  of Earnings........................................................................       F-29
 
Peter Kiewit Sons', Inc. and Subsidiaries Pro Forma Consolidated Condensed Balance
  Sheets.............................................................................       F-31
 
Report of Independent Accountants for Kiewit Construction Group                             F-35
 
Kiewit Construction Group Pro Forma Condensed Statements of Earnings                        F-36
 
Kiewit Construction Group Pro Forma Condensed Balance Sheets.........................       F-38
</TABLE>
 
                                      F-26
<PAGE>
                        PRO FORMA FINANCIAL INFORMATION
 
    The pro forma financial information of Peter Kiewit Sons', Inc. ("PKS") to
be renamed Diversified Holdings, Inc. after the Transaction, and the
Construction Group, to be operated by PKS Holdings, Inc. after the Transaction,
respectively, has been prepared to give effect, as further described below, to
the Transaction. The pro forma financial information assumes, in two separate
scenarios, that 1.5 million (Scenario 1) and 3 million (Scenario 2) shares of
Class C Stock will be converted in the 1997 Conversion Period as described
herein. Scenario 1 reflects an estimate of the number of shares of Class C Stock
to be tendered in the Transaction. Scenario 2 is set forth to illustrate the
impact of the tender of Class C shares equal to the maximum number of shares PKS
will allow to be exchanged.
 
    The pro forma condensed statements of earnings for the six months ended June
30, 1997 and for the year ended December 28, 1996 of PKS and the Construction
Group assume that the Transaction is consummated on December 29, 1996 and
December 31, 1995, respectively. The condensed balance sheets of PKS and the
Construction Group as of June 30, 1997 assume that the Transaction is
consummated as of such date.
 
    The pro forma financial information is not intended to reflect results of
operations or the financial position of PKS and the Construction Group which
actually would have resulted had the Transaction been effected on the dates
indicated. Moreover, the pro forma information is not intended to be indicative
of future results of operations or financial position of PKS and the
Construction Group.
 
    The pro forma financial information should be read in conjunction with PKS'
and the Construction Group's historical financial statements, and the notes
thereto, contained in PKS' Annual Report on Form 10-K for the year ended
December 28, 1996 and selected exhibits thereto and Quarterly Report on Form
10-Q for the quarter ended June 30, and selected exhibits thereto, all of which
are contained elsewhere herein or incorporated herein by reference.
 
                                      F-27
<PAGE>
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
The Board of Directors and Stockholders
Peter Kiewit Sons', Inc.
 
    We have examined the pro forma adjustments reflecting the transactions
described in the accompanying notes and the application of those adjustments to
the historical amounts in the accompanying pro forma consolidated condensed
statements of earnings of Peter Kiewit Sons', Inc. and Subsidiaries for the year
ended December 28, 1996. The historical consolidated condensed statements of
earnings are derived from the historical financial statements of Peter Kiewit
Sons', Inc. and Subsidiaries, which were audited by us and incorporated by
reference herein. Such pro forma adjustments are based upon management's
assumptions described in the accompanying notes. Our examination was made in
accordance with standards established by the American Institute of Certified
Public Accountants and, accordingly, included such procedures as we considered
necessary in the circumstances.
 
    In addition, we have reviewed the related pro forma adjustments and the
application of those adjustments to the historical amounts in the accompanying
pro forma consolidated condensed balance sheets of Peter Kiewit Sons', Inc. and
Subsidiaries as of June 30, 1997 and the pro forma consolidated condensed
statements of earnings for the six months then ended. The historical
consolidated condensed financial statements are derived from the historical
financial statements of Peter Kiewit Sons', Inc. and Subsidiaries, which were
reviewed by us, incorporated herein by reference. Such pro forma adjustments are
based upon management's assumptions described in the accompanying notes. Our
review was made in accordance with standards established by the American
Institute of Certified Public Accountants.
 
    The objective of this pro forma financial information is to show what the
significant effects on the historical information might have been had the
transactions occurred at an earlier date. However, the pro forma consolidated
condensed financial statements are not necessarily indicative of the results of
operations or related effects on financial position that would have been
attained had the above-mentioned transactions actually occurred earlier.
 
    In our opinion, management's assumptions provide a reasonable basis for
presenting the significant effects directly attributable to the above-mentioned
transactions described in the accompanying notes, the related pro forma
adjustments give appropriate effect to those assumptions, and the pro forma
columns reflect the proper application of those adjustments to the historical
financial statement amounts in the pro forma consolidated condensed statements
of earnings for the year ended December 28, 1996.
 
    A review is substantially less in scope than an audit, the objective of
which is the expression of an opinion on management's assumptions, the pro forma
adjustments and the application of those adjustments to historical financial
information. Accordingly, we do not express such an opinion on the pro forma
adjustments or the application of such adjustments to the pro forma consolidated
condensed balance sheets as of June 30, 1997, and the pro forma consolidated
condensed statements of earnings for the six months then ended. Based on our
review, however, nothing came to our attention that caused us to believe that
management's assumptions do not provide a reasonable basis for presenting the
significant effects directly attributable to the above-mentioned transactions
described in the accompanying notes, that the related pro forma adjustments do
not give appropriate effect to those assumptions, or that the pro forma columns
do not reflect the proper application of those adjustments to the historical
financial statement amounts in the pro forma consolidated condensed balance
sheets as of June 30, 1997 and the pro forma consolidated condensed statements
of earnings for the six months then ended.
 
                                          COOPERS & LYBRAND L.L.P.
 
Omaha, Nebraska
August 25, 1997
 
                                      F-28
<PAGE>
                   PETER KIEWIT SONS', INC. AND SUBSIDIARIES
 
            PRO FORMA CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS
 
                      FISCAL YEAR ENDED DECEMBER 28, 1996
 
                       AND SIX MONTHS ENDED JUNE 30, 1997
    (SCENARIO 1 ASSUMING 1.5 MILLION SHARES OF CLASS C STOCK CONVERTED INTO
                  CLASS D STOCK IN THE 1997 CONVERSION PERIOD)
<TABLE>
<CAPTION>
                                                                                                                        (UNAUDITED)
                                                                                                                        SIX MONTHS
                                                                                                                        ENDED JUNE
                                                                 FISCAL YEAR ENDED DECEMBER 28, 1996                     30, 1997
                                               -----------------------------------------------------------------------  ----------
                                                             SEPARATE      DECONSOLIDATE        OTHER          PRO
                                               HISTORICAL  PKS HOLDINGS        C-TEC         ADJUSTMENTS      FORMA     HISTORICAL
                                               ----------  -------------  ---------------  ---------------  ----------  ----------
<S>                                            <C>         <C>            <C>              <C>              <C>         <C>
                                                                 (DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
Revenue......................................  $    2,904    $  (2,286)      $    (367)       $      34(a)  $      285  $    1,381
Cost of Revenue..............................      (2,412)       2,064             250              (36)(a)       (134)     (1,143)
                                               ----------  -------------         -----            -----     ----------  ----------
                                                      492         (222)           (117)              (2)           151         238
General and Administrative Expenses..........        (260)         117              86              (37)(a)        (94)       (153)
                                               ----------  -------------         -----            -----     ----------  ----------
Operating Earnings...........................         232         (105)            (31)             (39)            57          85
Other Income (Expense):
  Equity Earnings, net.......................          12           (8)             (4)          --             --              20
  Investment Income, net.....................          72          (13)            (14)               2(b)          47          27
  Interest Expense, net......................         (37)           4              28           --                 (5)        (20)
  Other, net.................................          26          (58)              5               39(a)          12          20
                                               ----------  -------------         -----            -----     ----------  ----------
                                                       73          (75)             15               41             54          47
                                               ----------  -------------         -----            -----     ----------  ----------
Earnings before Income Taxes and Minority
  Interest in Net Losses of Subsidiaries.....         305         (180)            (16)               2            111         132
Provision for Income Taxes...................         (84)          72              14               (1)(c)          1         (50)
Minority Interest in Net Losses of
  Subsidiaries...............................      --           --                   2           --                  2           9
                                               ----------  -------------         -----            -----     ----------  ----------
Net Earnings.................................  $      221    $    (108)      $  --            $       1     $      114  $       91
                                               ----------  -------------         -----            -----     ----------  ----------
                                               ----------  -------------         -----            -----     ----------  ----------
Earnings Attributable to:
  Class C Stock                                $      108                                                   $   --      $       50
                                               ----------                                                   ----------  ----------
                                               ----------                                                   ----------  ----------
  Class D Stock..............................  $      113                                                   $      114  $       41
                                               ----------                                                   ----------  ----------
                                               ----------                                                   ----------  ----------
Earnings Per Share:
  Class C Stock
    Primary..................................  $    10.13                                                   $   --      $     5.34
                                               ----------                                                   ----------  ----------
                                               ----------                                                   ----------  ----------
    Fully diluted............................  $     9.82                                                   $   --      $     5.13
                                               ----------                                                   ----------  ----------
                                               ----------                                                   ----------  ----------
  Class D Stock
    Primary..................................  $     4.85                                                   $     4.07  $     1.67
                                               ----------                                                   ----------  ----------
                                               ----------                                                   ----------  ----------
    Fully diluted............................  $     4.85                                                   $     4.06  $     1.67
                                               ----------                                                   ----------  ----------
                                               ----------                                                   ----------  ----------
Weighted Average Shares Outstanding:
  Class C Stock
    Primary..................................  10,655,886                                                       --       9,307,834
                                               ----------                                                   ----------  ----------
                                               ----------                                                   ----------  ----------
    Fully diluted............................  11,026,045                                                       --       9,744,667
                                               ----------                                                   ----------  ----------
                                               ----------                                                   ----------  ----------
  Class D Stock
    Primary..................................  23,263,688                                                   28,119,741  24,544,153
                                               ----------                                                   ----------  ----------
                                               ----------                                                   ----------  ----------
    Fully diluted............................  23,273,775                                                   28,129,828  24,544,153
                                               ----------                                                   ----------  ----------
                                               ----------                                                   ----------  ----------
 
<CAPTION>
 
                                                 SEPARATE      DECONSOLIDATE        OTHER          PRO
                                               PKS HOLDINGS        C-TEC         ADJUSTMENTS      FORMA
                                               -------------  ---------------  ---------------  ----------
<S>                                            <C>            <C>              <C>              <C>
 
Revenue......................................   $    (1,047)     $    (194)       $      21(a)  $      161
Cost of Revenue..............................           942            139              (22)(a)        (84)
                                               -------------         -----              ---     ----------
                                                       (105)           (55)              (1)            77
General and Administrative Expenses..........            64             64              (16)(a)        (41)
                                               -------------         -----              ---     ----------
Operating Earnings...........................           (41)             9              (17)            36
Other Income (Expense):
  Equity Earnings, net.......................            (2)            (9)          --                  9
  Investment Income, net.....................            (6)            (5)               2(b)          18
  Interest Expense, net......................             1             12           --                 (7)
  Other, net.................................           (35)        --                   17(a)           2
                                               -------------         -----              ---     ----------
                                                        (42)            (2)              19             22
                                               -------------         -----              ---     ----------
Earnings before Income Taxes and Minority
  Interest in Net Losses of Subsidiaries.....           (83)             7                2             58
Provision for Income Taxes...................            33         --                   (1)(c)        (18)
Minority Interest in Net Losses of
  Subsidiaries...............................       --                  (7)          --                  2
                                               -------------         -----              ---     ----------
Net Earnings.................................   $       (50)     $  --            $       1     $       42
                                               -------------         -----              ---     ----------
                                               -------------         -----              ---     ----------
Earnings Attributable to:
  Class C Stock                                                                                 $   --
                                                                                                ----------
                                                                                                ----------
  Class D Stock..............................                                                   $       42
                                                                                                ----------
                                                                                                ----------
Earnings Per Share:
  Class C Stock
    Primary..................................                                                   $   --
                                                                                                ----------
                                                                                                ----------
    Fully diluted............................                                                   $   --
                                                                                                ----------
                                                                                                ----------
  Class D Stock
    Primary..................................                                                   $     1.43
                                                                                                ----------
                                                                                                ----------
    Fully diluted............................                                                   $     1.43
                                                                                                ----------
                                                                                                ----------
Weighted Average Shares Outstanding:
  Class C Stock
    Primary..................................                                                       --
                                                                                                ----------
                                                                                                ----------
    Fully diluted............................                                                       --
                                                                                                ----------
                                                                                                ----------
  Class D Stock
    Primary..................................                                                   29,440,561
                                                                                                ----------
                                                                                                ----------
    Fully diluted............................                                                   29,440,561
                                                                                                ----------
                                                                                                ----------
</TABLE>
 
  The accompanying notes are an integral part of these pro forma consolidated
                        condensed financial statements.
 
                                      F-29
<PAGE>
                   PETER KIEWIT SONS', INC. AND SUBSIDIARIES
 
            PRO FORMA CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS
 
                      FISCAL YEAR ENDED DECEMBER 28, 1996
 
                       AND SIX MONTHS ENDED JUNE 30, 1997
     (SCENARIO 2 ASSUMING 3 MILLION SHARES OF CLASS C STOCK CONVERTED INTO
                  CLASS D STOCK IN THE 1997 CONVERSION PERIOD)
<TABLE>
<CAPTION>
                                                                                                                      (UNAUDITED)
                                                                                                                      SIX MONTHS
                                                                                                                      ENDED JUNE
                                                                 FISCAL YEAR ENDED DECEMBER 28, 1996                   30, 1997
                                                 -------------------------------------------------------------------  ----------
                                                             SEPARATE
                                                                PKS      DECONSOLIDATE        OTHER          PRO
                                                 HISTORICAL  HOLDINGS        C-TEC         ADJUSTMENTS      FORMA     HISTORICAL
                                                 ----------  ---------  ---------------  ---------------  ----------  ----------
<S>                                              <C>         <C>        <C>              <C>              <C>         <C>
                                                                 (DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
Revenue........................................  $    2,904  $  (2,286)    $    (367)       $      34(a)  $      285  $    1,381
Cost of Revenue................................      (2,412)     2,064           250              (36)(a)       (134)     (1,143)
                                                 ----------  ---------         -----            -----     ----------  ----------
                                                        492       (222)         (117)              (2)           151         238
General and Administrative Expenses............        (260)       117            86              (37)(a)        (94)       (153)
                                                 ----------  ---------         -----            -----     ----------  ----------
Operating Earnings.............................         232       (105)          (31)             (39)            57          85
Other Income (Expense):
  Equity Earnings, net.........................          12         (8)           (4)          --             --              20
  Investment Income, net.......................          72        (13)          (14)             5(b)            50          27
  Interest Expense, net........................         (37)         4            28           --                 (5)        (20)
  Other, net...................................          26        (58)            5             39(a)            12          20
                                                 ----------  ---------         -----            -----     ----------  ----------
                                                         73        (75)           15               44             57          47
                                                 ----------  ---------         -----            -----     ----------  ----------
Earnings before Income Taxes and Minority
  Interest in Net Losses of Subsidiaries.......         305       (180)          (16)               5            114         132
Provision for Income Taxes.....................         (84)        72            14               (2)(c)     --             (50)
Minority Interest in Net Losses of
  Subsidiaries.................................      --         --                 2                               2           9
                                                 ----------  ---------         -----            -----     ----------  ----------
Net Earnings...................................  $      221  $    (108)    $  --            $       3     $      116  $       91
                                                 ----------  ---------         -----            -----     ----------  ----------
                                                 ----------  ---------         -----            -----     ----------  ----------
Earnings Attributable to:
  Class C Stock................................  $      108                                               $   --      $       50
                                                 ----------                                               ----------  ----------
                                                 ----------                                               ----------  ----------
  Class D Stock................................  $      113                                               $      116  $       41
                                                 ----------                                               ----------  ----------
                                                 ----------                                               ----------  ----------
Earnings Per Share:
  Class C Stock
    Primary....................................  $    10.13                                               $   --      $     5.34
                                                 ----------                                               ----------  ----------
                                                 ----------                                               ----------  ----------
    Fully diluted..............................  $     9.82                                               $   --      $     5.13
                                                 ----------                                               ----------  ----------
                                                 ----------                                               ----------  ----------
  Class D Stock
    Primary....................................  $     4.85                                               $     4.04  $     1.67
                                                 ----------                                               ----------  ----------
                                                 ----------                                               ----------  ----------
    Fully diluted..............................  $     4.85                                               $     4.03  $     1.67
                                                 ----------                                               ----------  ----------
                                                 ----------                                               ----------  ----------
Weighted Average Shares Outstanding:
  Class C Stock
    Primary....................................  10,655,886                                                   --       9,307,834
                                                 ----------                                               ----------  ----------
                                                 ----------                                               ----------  ----------
    Fully diluted..............................  11,026,045                                                   --       9,744,667
                                                 ----------                                               ----------  ----------
                                                 ----------                                               ----------  ----------
  Class D Stock
    Primary....................................  23,263,688                                               28,709,741  24,544,153
                                                 ----------                                               ----------  ----------
                                                 ----------                                               ----------  ----------
    Fully diluted..............................  23,273,775                                               28,719,828  24,544,153
                                                 ----------                                               ----------  ----------
                                                 ----------                                               ----------  ----------
 
<CAPTION>
 
                                                  SEPARATE
                                                     PKS       DECONSOLIDATE        OTHER          PRO
                                                  HOLDINGS         C-TEC         ADJUSTMENTS      FORMA
                                                 -----------  ---------------  ---------------  ----------
<S>                                              <C>          <C>              <C>              <C>
 
Revenue........................................   $  (1,047)     $    (194)       $      21(a)  $      161
Cost of Revenue................................         942            139              (22)(a)        (84)
                                                 -----------         -----              ---     ----------
                                                       (105)           (55)              (1)            77
General and Administrative Expenses............          64             64              (16)(a)        (41)
                                                 -----------         -----              ---     ----------
Operating Earnings.............................         (41)             9              (17)            36
Other Income (Expense):
  Equity Earnings, net.........................          (2)            (9)          --                  9
  Investment Income, net.......................          (6)            (5)               3(b)          19
  Interest Expense, net........................           1             12           --                 (7)
  Other, net...................................         (35)        --                   17(a)           2
                                                 -----------         -----              ---     ----------
                                                        (42)            (2)              20             23
                                                 -----------         -----              ---     ----------
Earnings before Income Taxes and Minority
  Interest in Net Losses of Subsidiaries.......         (83)             7                3             59
Provision for Income Taxes.....................          33         --                   (1)(c)        (18)
Minority Interest in Net Losses of
  Subsidiaries.................................      --                 (7)          --                  2
                                                 -----------         -----              ---     ----------
Net Earnings...................................   $     (50)     $  --            $       2     $       43
                                                 -----------         -----              ---     ----------
                                                 -----------         -----              ---     ----------
Earnings Attributable to:
  Class C Stock................................                                                 $   --
                                                                                                ----------
                                                                                                ----------
  Class D Stock................................                                                 $       43
                                                                                                ----------
                                                                                                ----------
Earnings Per Share:
  Class C Stock
    Primary....................................                                                 $   --
                                                                                                ----------
                                                                                                ----------
    Fully diluted..............................                                                 $   --
                                                                                                ----------
                                                                                                ----------
  Class D Stock
    Primary....................................                                                 $     1.43
                                                                                                ----------
                                                                                                ----------
    Fully diluted..............................                                                 $     1.43
                                                                                                ----------
                                                                                                ----------
Weighted Average Shares Outstanding:
  Class C Stock
    Primary....................................                                                     --
                                                                                                ----------
                                                                                                ----------
    Fully diluted..............................                                                     --
                                                                                                ----------
                                                                                                ----------
  Class D Stock
    Primary....................................                                                 30,198,632
                                                                                                ----------
                                                                                                ----------
    Fully diluted..............................                                                 30,198,632
                                                                                                ----------
                                                                                                ----------
</TABLE>
 
  The accompanying notes are an integral part of these pro forma consolidated
                        condensed financial statements.
 
                                      F-30
<PAGE>
                   PETER KIEWIT SONS', INC. AND SUBSIDIARIES
 
                 PRO FORMA CONSOLIDATED CONDENSED BALANCE SHEET
 
                                  (UNAUDITED)
                                 JUNE 30, 1997
 
            (SCENARIO 1 ASSUMING 1.5 MILLION SHARES OF CLASS C STOCK
          CONVERTED INTO CLASS D STOCK IN THE 1997 CONVERSION PERIOD)
<TABLE>
<CAPTION>
                                                                            SEPARATE        DECONSOLIDATE         OTHER
                                                            HISTORICAL    PKS HOLDINGS          C-TEC          ADJUSTMENTS
                                                            -----------  ---------------  -----------------  ---------------
<S>                                                         <C>          <C>              <C>                <C>
                                                           ASSETS
Current Assets:
  Cash and cash equivalents...............................   $     388      $    (127)        $     (58)        $      60(a)
                                                                                                                       69(b)
  Marketable securities...................................         368            (33)               (4)           --
  Restricted securities...................................          24         --                --                --
  Receivables, net........................................         421           (336)              (51)               12(c)
  Costs and earnings in excess of billings on uncompleted
    contracts.............................................          95            (95)           --                --
  Investment in construction joint ventures...............         113           (113)           --                --
  Deferred income taxes...................................          65            (69)              (10)               14(c)
  Other...................................................          50            (34)              (12)               11(c)
                                                            -----------       -------             -----             -----
    Total Current Assets..................................       1,524           (807)             (135)              166
Property, Plant and Equipment, net........................         872           (201)             (495)           --
Investments...............................................         946            (87)              (82)           --
Intangible Assets, net....................................         393            (22)             (348)               (2)(c)
Net Assets of C-TEC.......................................      --             --                   347            --
Other Assets..............................................          70         --                   (26)                2(c)
                                                            -----------       -------             -----             -----
                                                             $   3,805      $  (1,117)        $    (739)        $     166
                                                            -----------       -------             -----             -----
                                                            -----------       -------             -----             -----
                                            LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
  Accounts payable........................................   $     227      $    (173)        $     (36)        $      12(c)
                                                                                                                       10(d)
  Current portion of long-term debt:
    Telecommunications....................................          11         --                   (11)           --
    Other.................................................           3             (2)           --                --
  Accrued costs and billings in excess of revenue on
    uncompleted contracts.................................         193           (180)              (13)           --
  Accrued insurance costs.................................          85            (85)           --                --
  Income taxes payable....................................      --             --                --                    11(c)
                                                                                                                       (4)(e)
  Deferred income taxes...................................      --             --                --                    14(c)
                                                                                                                       10(f)
  Other...................................................         142            (43)              (66)           --
                                                            -----------       -------             -----             -----
    Total Current Liabilities.............................         661           (483)             (126)               53
Long-term Debt, less current portion:
  Telecommunications......................................         244         --                  (244)           --
  Other...................................................         149            (16)           --                --
Deferred Income Taxes.....................................         227              8               (99)           --
Retirement Benefits.......................................          47         --                    (2)           --
Accrued Reclamation Costs.................................         102             (1)           --                --
Other Liabilities.........................................         231            (66)              (52)           --
Minority Interest.........................................         218         --                  (216)           --
Stockholders' Equity:
  Preferred stock.........................................      --             --                --                --
  Common stock
    Class C shares outstanding; historical--10,093,635 pro
      forma--0............................................           1             (1)           --                --
    Class D shares outstanding; historical--24,575,825
      pro forma--26,950,316...............................           1         --                --                --
  Additional paid-in capital..............................         273           (117)           --                    60(a)
                                                                                                                       69(b)
                                                                                                                      101(g)
  Foreign currency adjustment.............................          (8)             6            --                --
  Net unrealized holding gains............................          10              7            --                --
  Retained earnings.......................................       1,649           (454)           --                   (10)(d)
                                                                                                                        4(e)
                                                                                                                      (10)(f)
                                                                                                                     (101)(g)
                                                            -----------       -------             -----             -----
Total Stockholders' Equity................................       1,926           (559)           --                   113
                                                            -----------       -------             -----             -----
                                                             $   3,805      $  (1,117)        $    (739)        $     166
                                                            -----------       -------             -----             -----
                                                            -----------       -------             -----             -----
 
<CAPTION>
                                                                PRO
                                                               FORMA
                                                            -----------
<S>                                                         <C>
 
Current Assets:
  Cash and cash equivalents...............................   $     332
 
  Marketable securities...................................         331
  Restricted securities...................................          24
  Receivables, net........................................          46
  Costs and earnings in excess of billings on uncompleted
    contracts.............................................      --
  Investment in construction joint ventures...............      --
  Deferred income taxes...................................      --
  Other...................................................          15
                                                            -----------
    Total Current Assets..................................         748
Property, Plant and Equipment, net........................         176
Investments...............................................         777
Intangible Assets, net....................................          21
Net Assets of C-TEC.......................................         347
Other Assets..............................................          46
                                                            -----------
                                                             $   2,115
                                                            -----------
                                                            -----------
                                            LIABILITIES AN
Current Liabilities:
  Accounts payable........................................   $      40
 
  Current portion of long-term debt:
    Telecommunications....................................      --
    Other.................................................           1
  Accrued costs and billings in excess of revenue on
    uncompleted contracts.................................      --
  Accrued insurance costs.................................      --
  Income taxes payable....................................           7
 
  Deferred income taxes...................................          24
 
  Other...................................................          33
                                                            -----------
    Total Current Liabilities.............................         105
Long-term Debt, less current portion:
  Telecommunications......................................      --
  Other...................................................         133
Deferred Income Taxes.....................................         136
Retirement Benefits.......................................          45
Accrued Reclamation Costs.................................         101
Other Liabilities.........................................         113
Minority Interest.........................................           2
Stockholders' Equity:
  Preferred stock.........................................      --
  Common stock
    Class C shares outstanding; historical--10,093,635 pro
      forma--0............................................      --
    Class D shares outstanding; historical--24,575,825
      pro forma--26,950,316...............................           1
  Additional paid-in capital..............................         386
 
  Foreign currency adjustment.............................          (2)
  Net unrealized holding gains............................          17
  Retained earnings.......................................       1,078
 
                                                            -----------
Total Stockholders' Equity................................       1,480
                                                            -----------
                                                             $   2,115
                                                            -----------
                                                            -----------
</TABLE>
 
   The accompanying notes are an integral part of this pro forma consolidated
                         condensed financial statement.
 
                                      F-31
<PAGE>
                   PETER KIEWIT SONS', INC. AND SUBSIDIARIES
 
                 PRO FORMA CONSOLIDATED CONDENSED BALANCE SHEET
 
                                  (UNAUDITED)
                                 JUNE 30, 1997
 
     (SCENARIO 2 ASSUMING 3 MILLION SHARES OF CLASS C STOCK CONVERTED INTO
                  CLASS D STOCK IN THE 1997 CONVERSION PERIOD)
<TABLE>
<CAPTION>
                                                                           SEPARATE        DECONSOLIDATE         OTHER
                                                           HISTORICAL    PKS HOLDINGS          C-TEC          ADJUSTMENTS
                                                           -----------  ---------------  -----------------  ---------------
<S>                                                        <C>          <C>              <C>                <C>
                                                          ASSETS
Current Assets:
  Cash and cash equivalents..............................   $     388      $    (127)        $     (58)        $     120(a)
                                                                                                                      69(b)
  Marketable securities..................................         368            (33)               (4)           --
  Restricted securities..................................          24         --                --                --
  Receivables, net.......................................         421           (336)              (51)               12(c)
  Costs and earnings in excess of billings on uncompleted
    contracts............................................          95            (95)           --                --
  Investment in construction joint ventures..............         113           (113)           --                --
  Deferred income taxes..................................          65            (69)              (10)               14(c)
  Other..................................................          50            (34)              (12)               11(c)
                                                           -----------       -------            ------            ------
    Total Current Assets.................................       1,524           (807)             (135)              226
Property, Plant and Equipment, net.......................         872           (201)             (495)           --
Investments..............................................         946            (87)              (82)           --
Intangible Assets, net...................................         393            (22)             (348)               (2)(c)
Net Assets of C-TEC......................................      --             --                   347            --
Other Assets.............................................          70         --                   (26)                2(c)
                                                           -----------       -------            ------            ------
                                                            $   3,805      $  (1,117)        $    (739)        $     226
                                                           -----------       -------            ------            ------
                                                           -----------       -------            ------            ------
                                           LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
  Accounts payable.......................................   $     227      $    (173)        $     (36)        $      12(c)
                                                                                                                      10(d)
  Current portion of long-term debt:
    Telecommunications...................................          11         --                   (11)           --
    Other................................................           3             (2)           --                --
  Accrued costs and billings in excess of revenue on
    uncompleted contracts................................         193           (180)              (13)           --
  Accrued insurance costs................................          85            (85)           --                --
  Income taxes payable...................................      --             --                --                    11(c)
                                                                                                                      (4)(e)
  Deferred income taxes..................................      --             --                --                    14(c)
                                                                                                                      10(f)
  Other..................................................         142            (43)              (66)           --
                                                           -----------       -------            ------            ------
    Total Current Liabilities............................         661           (483)             (126)               53
Long-term Debt, less current portion:
  Telecommunications.....................................         244         --                  (244)           --
  Other..................................................         149            (16)           --                --
Deferred Income Taxes....................................         227              8               (99)           --
Retirement Benefits......................................          47         --                    (2)           --
Accrued Reclamation Costs................................         102             (1)           --                --
Other Liabilities........................................         231            (66)              (52)           --
Minority Interest........................................         218         --                  (216)           --
Stockholders' Equity:
  Preferred stock........................................      --             --                --                --
  Common stock
    Class C shares outstanding; historical--10,093,635
      pro forma--0.......................................          (1)            (1)           --                --
    Class D shares outstanding; historical--24,575,825
      pro forma--28,056,307..............................           1           (117)           --                --
  Additional paid-in capital.............................         273         --                --                   120(a)
                                                                                                                      69(b)
                                                                                                                      84(g)
  Foreign currency adjustment............................          (8)             6            --                --
  Net unrealized holding gains...........................          10              7            --                --
  Retained earnings......................................       1,649           (454)           --                   (10)(d)
                                                                                                                       4(e)
                                                                                                                     (10)(f)
                                                                                                                     (84)(g)
                                                           -----------       -------            ------            ------
  Total Stockholders' Equity.............................       1,926           (559)           --                   173
                                                           -----------       -------            ------            ------
                                                            $   3,805      $  (1,117)        $    (739)        $     226
                                                           -----------       -------            ------            ------
                                                           -----------       -------            ------            ------
 
<CAPTION>
                                                               PRO
                                                              FORMA
                                                           -----------
<S>                                                        <C>
 
Current Assets:
  Cash and cash equivalents..............................   $     392
 
  Marketable securities..................................         331
  Restricted securities..................................          24
  Receivables, net.......................................          46
  Costs and earnings in excess of billings on uncompleted
    contracts............................................      --
  Investment in construction joint ventures..............      --
  Deferred income taxes..................................      --
  Other..................................................          15
                                                           -----------
    Total Current Assets.................................         808
Property, Plant and Equipment, net.......................         176
Investments..............................................         777
Intangible Assets, net...................................          21
Net Assets of C-TEC......................................         347
Other Assets.............................................          46
                                                           -----------
                                                            $   2,175
                                                           -----------
                                                           -----------
                                           LIABILITIES AN
Current Liabilities:
  Accounts payable.......................................   $      40
 
  Current portion of long-term debt:
    Telecommunications...................................      --
    Other................................................           1
  Accrued costs and billings in excess of revenue on
    uncompleted contracts................................      --
  Accrued insurance costs................................      --
  Income taxes payable...................................           7
 
  Deferred income taxes..................................          24
 
  Other..................................................          33
                                                           -----------
    Total Current Liabilities............................         105
Long-term Debt, less current portion:
  Telecommunications.....................................      --
  Other..................................................         133
Deferred Income Taxes....................................         136
Retirement Benefits......................................          45
Accrued Reclamation Costs................................         101
Other Liabilities........................................         113
Minority Interest........................................           2
Stockholders' Equity:
  Preferred stock........................................      --
  Common stock
    Class C shares outstanding; historical--10,093,635
      pro forma--0.......................................      --
    Class D shares outstanding; historical--24,575,825
      pro forma--28,056,307..............................           1
  Additional paid-in capital.............................         429
 
  Foreign currency adjustment............................          (2)
  Net unrealized holding gains...........................          17
  Retained earnings......................................       1,095
 
                                                           -----------
  Total Stockholders' Equity.............................       1,540
                                                           -----------
                                                            $   2,175
                                                           -----------
                                                           -----------
</TABLE>
 
   The accompanying notes are an integral part of this pro forma consolidated
                         condensed financial statement.
 
                                      F-32
<PAGE>
                   PETER KIEWIT SONS', INC. AND SUBSIDIARIES
 
         NOTES TO PRO FORMA CONSOLIDATED CONDENSED FINANCIAL STATEMENTS
 
1. BASIS OF REPORTING
 
    The accompanying pro forma consolidated condensed financial statements of
PKS ("the Company") are presented based upon the historical consolidated
financial statements and the notes thereto of PKS, as adjusted to remove the
earnings statement and the balance sheet accounts of PKS Holdings, Inc., to
reflect C-TEC Corporation ("C-TEC") as an equity method investment due to
C-TEC's pending reorganization which will reduce the Company's voting interest
below fifty percent and to give effect to certain other elements of the
Transaction. The pro forma information assumes, in two separate scenarios, that
1.5 million (Scenario 1) and 3 million (Scenario 2) shares of Class C Stock are
converted into Class D Stock in the 1997 Conversion Period. Such pro forma
financial statements should be read in conjunction with the separate historical
consolidated financial statements and the notes thereto of PKS, incorporated
herein by reference. Such pro forma financial statements are not necessarily
indicative of the future results of operations or financial position.
 
    The PKS Board of Directors preliminarily approved a plan to make a tax-free
distribution of its entire ownership interest in PKS Holdings, Inc. to the Class
C Stockholders at a special meeting on August 14, 1997.
 
    Completion of the Transaction has been assumed to be as of June 30, 1997 in
the pro forma consolidated condensed balance sheets and as of December 31, 1995
and December 29, 1996 in the pro forma consolidated condensed statements of
earnings for the year ended December 28, 1996 and the six months ended June 30,
1997, respectively.
 
    The significant accounting policies followed by PKS, described in the notes
to its historical consolidated financial statements incorporated herein by
reference, have been used in preparing the accompanying pro forma consolidated
condensed financial statements.
 
2. STATEMENTS OF EARNINGS PRO FORMA ADJUSTMENTS
 
    As described in Note 1, the historical consolidated condensed statements of
earnings for PKS have been adjusted to remove the earnings statement accounts of
PKS Holdings, Inc., to reflect C-TEC as an equity method investment and to give
effect to certain other elements of the Transaction. The adjustments made in
preparation of the PKS Pro Forma Consolidated Condensed Statements of Earnings
are described below:
 
        (a) Adjustments made to reflect certain intercompany revenues and
    expenses recognized between PKS Holdings, Inc. and PKS that had been
    eliminated in the historical consolidated condensed statements of earnings.
    The intercompany revenues and expenses primarily pertain to certain
    construction work and coal mine management services performed by PKS
    Holdings, Inc. for PKS eliminated in the consolidated results. This pro
    forma presentation requires that these earnings statement items be
    reestablished to properly reflect the separate operating results of PKS
    Holdings, Inc. and PKS.
 
        (b) Adjustments made to reflect an increase in interest income from the
    cash and cash equivalents paid by PKS Holdings, Inc. upon conversion of 1.5
    million shares of Class C Stock into Class D Stock in Scenario 1 and 3
    million shares of Class C Stock into Class D Stock in Scenario 2. The
    interest rate used to calculate the increase in interest income approximates
    the average rate earned by the Company during the periods.
 
        (c) Adjustments made to reflect the tax effect of the above adjustments.
 
                                      F-33
<PAGE>
                   PETER KIEWIT SONS', INC. AND SUBSIDIARIES
 
   NOTES TO PRO FORMA CONSOLIDATED CONDENSED FINANCIAL STATEMENTS (CONTINUED)
 
3. BALANCE SHEET PRO FORMA ADJUSTMENTS
 
    As described in Note 1, the historical consolidated balance sheet of PKS has
been adjusted to remove the balance sheet accounts of PKS Holdings, Inc., to
reflect C-TEC as an equity method investment and to give effect to certain other
elements of the Transaction. The adjustments made in preparation of the PKS Pro
Forma Consolidated Condensed Balance Sheets are described below:
 
    (a) Adjustments made to reflect the increase in cash and cash equivalents as
the result of the conversion of 1.5 million (Scenario 1) and 3 million shares
(Scenario 2) of Class C Stock into Class D Stock at the prior year end stock
prices and conversion ratios, adjusted for dividends declared during the six
months ended June 30, 1997.
 
    (b) Adjustments made to reflect sale of Class D Stock to certain directors
of Diversified Holdings.
 
    (c) Adjustments made to reflect certain reclassifications of account
balances when PKS Holdings, Inc. and C-TEC Corporation are removed from the
consolidated results of PKS and certain intercompany accounts between PKS
Holdings, Inc. and PKS that had been eliminated in the consolidated results.
 
    (d) Adjustments made to record the accrual of certain estimated expenses,
including costs for the Canadian Class C shareholders, the modification of the
conversion terms of the Debentures, and legal and other professional fees,
incurred as a result of the Transaction.
 
    (e) Adjustment to reflect the tax effect of the above adjustment.
 
    (f) Adjustments made to record the accrual of certain estimated United
States Federal income taxes expected to be incurred as a result of the
Transaction.
 
    (g) Adjustments made to record the estimated fair value of the Warrants
issued to Class C Shareholders.
 
4. EARNINGS PER SHARE
 
    Primary and fully diluted earnings per share of common stock have been
computed using the weighted average number of shares outstanding during each
period after giving effect to common stock equivalents and other dilutive
securities.
 
                                      F-34
<PAGE>
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
The Board of Directors and Stockholders
Peter Kiewit Sons', Inc.
 
    We have examined the pro forma adjustments reflecting the transactions
described in the accompanying notes and the application of those adjustments to
the historical amounts in the accompanying pro forma condensed statements of
earnings of Kiewit Construction & Mining Group for the year ended December 28,
1996. The historical condensed statements of earnings are derived from the
historical financial statements of Kiewit Construction & Mining Group, which
were audited by us and included elsewhere herein. Such pro forma adjustments are
based upon management's assumptions described in the accompanying notes. Our
examination was made in accordance with standards established by the American
Institute of Certified Public Accountants and, accordingly, included such
procedures as we considered necessary in the circumstances.
 
    In addition, we have reviewed the related pro forma adjustments and the
application of those adjustments to the historical amounts in the accompanying
pro forma condensed balance sheets of Kiewit Construction & Mining Group as of
June 30, 1997 and the pro forma condensed statements of earnings for the six
months then ended. The historical condensed financial statements are derived
from the historical financial statements of Kiewit Construction & Mining Group,
which were reviewed by us and included elsewhere herein. Such pro forma
adjustments are based upon management's assumptions described in the
accompanying notes. Our review was made in accordance with standards established
by the American Institute of Certified Public Accountants.
 
    The objective of this pro forma financial information is to show what the
significant effects on the historical information might have been had the
transactions occurred at an earlier date. However, the pro forma condensed
financial statements are not necessarily indicative of the results of operations
or related effects on financial position that would have been attained had the
above-mentioned transactions actually occurred earlier.
 
    In our opinion, management's assumptions provide a reasonable basis for
presenting the significant effects directly attributable to the above-mentioned
transactions described in the accompanying notes, the related pro forma
adjustments give appropriate effect to those assumptions, and the pro forma
columns reflect the proper application of those adjustments to the historical
financial statement amounts in the pro forma condensed statements of earnings
for the year ended December 28, 1996.
 
    A review is substantially less in scope than an audit, the objective of
which is the expression of an opinion on management's assumptions, the pro forma
adjustments and the application of those adjustments to historical financial
information. Accordingly, we do not express such an opinion on the pro forma
adjustments or the application of such adjustments to the pro forma condensed
balance sheet as of June 30, 1997 and the pro forma condensed statements of
earnings for the six months then ended. Based on our review, however, nothing
came to our attention that caused us to believe that management's assumptions do
not provide a reasonable basis for presenting the significant effects directly
attributable to the above-mentioned transactions described in the accompanying
notes, that the related pro forma adjustments do not give appropriate effect to
those assumptions, or that the pro forma columns do not reflect the proper
application of those adjustments to the historical financial statement amounts
in the pro forma condensed balance sheets as of June 30, 1997, and the pro forma
condensed statements of earnings for the six months then ended.
 
                                          COOPERS & LYBRAND L.L.P.
 
Omaha, Nebraska
August 25, 1997
 
                                      F-35
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   PRO FORMA CONDENSED STATEMENTS OF EARNINGS
 
                      FISCAL YEAR ENDED DECEMBER 28, 1996
 
                       AND SIX MONTHS ENDED JUNE 30, 1997
    (SCENARIO 1 ASSUMING 1.5 MILLION SHARES OF CLASS C STOCK CONVERTED INTO
                  CLASS D STOCK IN THE 1997 CONVERSION PERIOD)
<TABLE>
<CAPTION>
                                                                                             (UNAUDITED)
                                     FISCAL YEAR ENDED DECEMBER 28, 1996           SIX MONTHS ENDED JUNE 30, 1997
                                  ------------------------------------------  -----------------------------------------
<S>                               <C>            <C>            <C>           <C>           <C>            <C>
                                                     OTHER                                      OTHER
                                                  ADJUSTMENTS       PRO                      ADJUSTMENTS       PRO
                                   HISTORICAL      (NOTE 2)        FORMA       HISTORICAL     (NOTE 2)        FORMA
                                  -------------  -------------  ------------  ------------  -------------  ------------
 
<CAPTION>
                                                     (DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
<S>                               <C>            <C>            <C>           <C>           <C>            <C>
Revenue.........................  $       2,286    $  --        $      2,286  $      1,047    $  --        $      1,047
Cost of Revenue.................         (2,064)      --              (2,064)         (942)      --                (942)
                                  -------------       ------    ------------  ------------       ------    ------------
                                            222       --                 222           105       --                 105
General and Administrative
  Expenses......................           (117)      --                (117)          (64)      --                 (64)
                                  -------------       ------    ------------  ------------       ------    ------------
Operating Earnings..............            105       --                 105            41       --                  41
 
Other Income (Expense):
Investment Income...............             21           (2)(a)           19            8           (2)(a)            6
Interest Expense................             (4)      --                  (4)           (1)      --                  (1)
Other, net......................             58       --                  58            35       --                  35
                                  -------------       ------    ------------  ------------       ------    ------------
                                             75           (2)             73            42           (2)             40
                                  -------------       ------    ------------  ------------       ------    ------------
Earnings before Income Taxes....            180           (2)            178            83           (2)             81
(Provision) Benefit for Income
  Taxes.........................            (72)           1(b)          (71)          (33)           1(b)          (32)
                                  -------------       ------    ------------  ------------       ------    ------------
Net Earnings....................  $         108    $      (1)   $        107  $         50    $      (1)   $         49
                                  -------------       ------    ------------  ------------       ------    ------------
                                  -------------       ------    ------------  ------------       ------    ------------
Primary Earnings Per Share......  $       10.13                 $      11.21  $       5.34                 $       5.92
                                  -------------                 ------------  ------------                 ------------
                                  -------------                 ------------  ------------                 ------------
Fully Diluted Earnings Per
  Share.........................  $        9.82                 $      11.21  $       5.13                 $       5.92
                                  -------------                 ------------  ------------                 ------------
                                  -------------                 ------------  ------------                 ------------
Weighted Average Shares
  Outstanding:
Primary.........................     10,655,886                    9,526,045     9,307,834                    8,244,667
                                  -------------                 ------------  ------------                 ------------
                                  -------------                 ------------  ------------                 ------------
Fully Diluted...................     11,026,045                    9,526,045     9,744,667                    8,244,667
                                  -------------                 ------------  ------------                 ------------
                                  -------------                 ------------  ------------                 ------------
</TABLE>
 
    The accompanying notes are an integral part of these pro forma condensed
                             financial statements.
 
                                      F-36
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
                   PRO FORMA CONDENSED STATEMENTS OF EARNINGS
 
                      FISCAL YEAR ENDED DECEMBER 28, 1996
 
                       AND SIX MONTHS ENDED JUNE 30, 1997
     (SCENARIO 2 ASSUMING 3 MILLION SHARES OF CLASS C STOCK CONVERTED INTO
                  CLASS D STOCK IN THE 1997 CONVERSION PERIOD)
<TABLE>
<CAPTION>
                                                                                             (UNAUDITED)
                                     FISCAL YEAR ENDED DECEMBER 28, 1996           SIX MONTHS ENDED JUNE 30, 1997
                                  ------------------------------------------  -----------------------------------------
<S>                               <C>            <C>            <C>           <C>           <C>            <C>
                                                     OTHER                                      OTHER
                                                  ADJUSTMENTS       PRO                      ADJUSTMENTS       PRO
                                   HISTORICAL      (NOTE 2)        FORMA       HISTORICAL     (NOTE 2)        FORMA
                                  -------------  -------------  ------------  ------------  -------------  ------------
 
<CAPTION>
                                                     (DOLLARS IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
<S>                               <C>            <C>            <C>           <C>           <C>            <C>
Revenue.........................  $       2,286    $  --        $      2,286  $      1,047    $  --        $      1,047
Cost of Revenue.................         (2,064)      --              (2,064)         (942)      --                (942)
                                  -------------       ------    ------------  ------------       ------    ------------
                                            222       --                 222           105       --                 105
 
General and Administrative
  Expenses......................           (117)      --                (117)          (64)      --                 (64)
                                  -------------       ------    ------------  ------------       ------    ------------
Operating Earnings..............            105       --                 105            41       --                  41
Other Income (Expense):
Investment Income...............             21           (5)(a)           16            8           (3)(a)            5
Interest Expense................             (4)      --                  (4)           (1)      --                  (1)
Other, net......................             58       --                  58            35       --                  35
                                  -------------       ------    ------------  ------------       ------    ------------
                                             75           (5)             70            42           (3)             39
                                  -------------       ------    ------------  ------------       ------    ------------
Earnings before Income Taxes....            180           (5)            175            83           (3)             80
(Provision) Benefit for Income
  Taxes.........................            (72)           2(b)          (70)          (33)           1(b)          (32)
                                  -------------       ------    ------------  ------------       ------    ------------
Net Earnings....................  $         108    $      (3)   $        105  $         50    $      (2)   $         48
                                  -------------       ------    ------------  ------------       ------    ------------
                                  -------------       ------    ------------  ------------       ------    ------------
Primary Earnings Per Share......  $       10.13                 $      13.12  $       5.34                 $       7.10
                                  -------------                 ------------  ------------                 ------------
                                  -------------                 ------------  ------------                 ------------
Fully Diluted Earnings Per
  Share.........................  $        9.82                 $      13.12  $       5.13                 $       7.10
                                  -------------                 ------------  ------------                 ------------
                                  -------------                 ------------  ------------                 ------------
Weighted Average Shares
  Outstanding:
Primary.........................     10,655,886                    8,026,045     9,307,834                    6,744,667
                                  -------------                 ------------  ------------                 ------------
                                  -------------                 ------------  ------------                 ------------
Fully Diluted...................     11,026,045                    8,026,045     9,744,667                    6,744,667
                                  -------------                 ------------  ------------                 ------------
                                  -------------                 ------------  ------------                 ------------
</TABLE>
 
    The accompanying notes are an integral part of these pro forma condensed
                             financial statements.
 
                                      F-37
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
                       PRO FORMA CONDENSED BALANCE SHEET
                                  (UNAUDITED)
                                 JUNE 30, 1997
    (SCENARIO 1 ASSUMING 1.5 MILLION SHARES OF CLASS C STOCK CONVERTED INTO
                  CLASS D STOCK IN THE 1997 CONVERSION PERIOD)
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                                       ADJUSTMENTS
                                                                        HISTORICAL      (NOTE 3)       PRO FORMA
                                                                        -----------  ---------------  -----------
<S>                                                                     <C>          <C>              <C>
                                                                                  (DOLLARS IN MILLIONS)
Current Assets:
  Cash and cash equivalents...........................................   $     127      $     (60)(a)  $      67
  Marketable securities...............................................          33         --                 33
  Receivables, net....................................................         336         --                336
  Costs and earnings in excess of billings on uncompleted contracts...          95         --                 95
  Investment in construction joint ventures...........................         113         --                113
  Deferred income taxes...............................................          69             (2)(b)         67
  Other...............................................................          34              1(c)          35
                                                                        -----------           ---     -----------
    Total Current Assets..............................................         807            (61)           746
Property, Plant and Equipment, net....................................         201         --                201
Investments...........................................................          87         --                 87
Other Assets..........................................................          22         --                 22
                                                                        -----------           ---     -----------
                                                                         $   1,117      $     (61)     $   1,056
                                                                        -----------           ---     -----------
                                                                        -----------           ---     -----------
 
                                      LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
  Accounts payable....................................................   $     173      $       3(d)   $     176
  Accrued costs and billings in excess of revenue on uncompleted
    contracts.........................................................         180         --                180
  Accrued insurance costs.............................................          85         --                 85
  Other...............................................................          45         --                 45
                                                                        -----------           ---     -----------
    Total Current Liabilities.........................................         483              3            486
Long-term Debt, less current portion..................................          16            (10)(e)          6
Other Liabilities.....................................................          59         --                 59
Stockholders' Equity:
  (Class C shares outstanding; historical 10,093,635, pro forma
    9,030,468)
  Common equity.......................................................         572            (60)(a)        518
                                                                                               (2)(b)
                                                                                                1(c)
                                                                                               (3)(d)
                                                                                               10(e)
  Foreign currency adjustment.........................................          (6)        --                 (6)
  Unrealized holding gain (loss)......................................          (7)        --                 (7)
                                                                        -----------           ---     -----------
    Total Stockholders' Equity........................................         559            (54)           505
                                                                        -----------           ---     -----------
                                                                         $   1,117      $     (61)     $   1,056
                                                                        -----------           ---     -----------
                                                                        -----------           ---     -----------
</TABLE>
 
    The accompanying notes are an integral part of this pro forma condensed
                             financial statements.
 
                                      F-38
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
                       PRO FORMA CONDENSED BALANCE SHEET
                                  (UNAUDITED)
                                 JUNE 30, 1997
     (SCENARIO 2 ASSUMING 3 MILLION SHARES OF CLASS C STOCK CONVERTED INTO
                  CLASS D STOCK IN THE 1997 CONVERSION PERIOD)
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                                      ADJUSTMENTS
                                                                        HISTORICAL     (NOTE 3)       PRO FORMA
                                                                        -----------  -------------  -------------
<S>                                                                     <C>          <C>            <C>
                                                                                  (DOLLARS IN MILLIONS)
Current Assets:
  Cash and cash equivalents...........................................   $     127     $    (120)(a)   $       7
  Marketable securities...............................................          33        --                 33
  Receivables, net....................................................         336        --                336
  Costs and earnings in excess of billings on uncompleted contracts...          95        --                 95
  Investment in construction joint ventures...........................         113        --                113
  Deferred income taxes...............................................          69            (2)(b)          67
  Other...............................................................          34             1(c)          35
                                                                        -----------        -----          -----
    Total Current Assets..............................................         807          (121)           686
Property, Plant and Equipment, net....................................         201        --                201
Investments...........................................................          87        --                 87
Other Assets..........................................................          22        --                 22
                                                                        -----------        -----          -----
                                                                         $   1,117     $    (121)     $     996
                                                                        -----------        -----          -----
                                                                        -----------        -----          -----
 
                                      LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
  Accounts payable....................................................   $     173     $       3(d)   $     176
  Accrued costs and billings in excess of revenue on uncompleted
    contracts.........................................................         180        --                180
  Accrued insurance costs.............................................          85        --                 85
  Other...............................................................          45        --                 45
                                                                        -----------        -----          -----
    Total Current Liabilities.........................................         483             3            486
Long-term Debt, less current portion..................................          16           (10)(e)           6
Other Liabilities.....................................................          59        --                 59
Stockholders' Equity:
  Class C shares outstanding; historical 10,093,635; pro forma
    7,530,468
  Common equity.......................................................         572          (120)(a)         458
                                                                                              (2)(b)
                                                                                               1(c)
                                                                                              (3)(d)
                                                                                              10(e)
  Foreign currency adjustment.........................................          (6)       --                 (6)
  Unrealized holding gain (loss)......................................          (7)       --                 (7)
                                                                        -----------        -----          -----
    Total Stockholders' Equity........................................         559          (114)           445
                                                                        -----------        -----          -----
                                                                         $   1,117     $    (121)     $     996
                                                                        -----------        -----          -----
                                                                        -----------        -----          -----
</TABLE>
 
    The accompanying notes are an integral part of this pro forma condensed
                             financial statements.
 
                                      F-39
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
               NOTES TO PRO FORMA CONDENSED FINANCIAL STATEMENTS
 
1. BASIS OF REPORTING
 
    The accompanying pro forma condensed financial statements of Kiewit
Construction & Mining Group (the "Company") are presented based upon the
historical financial statements and the notes thereto of the Kiewit Construction
& Mining Group as adjusted to give effect to certain elements of the
Transaction. The pro forma information assumes, in two separate scenarios, that
1.5 million (Scenario 1) and 3 million (Scenario 2) shares of Class C Stock are
exchanged in the 1997 Conversion Period. Such pro forma financial statements
should be read in conjunction with the separate historical financial statements
and the notes thereto of Kiewit Construction & Mining Group, included elsewhere
herein. Such pro forma financial statements are not necessarily indicative of
the future results of operations or financial position.
 
    Completion of the Transaction has been assumed to be as of June 30, 1997 in
the pro forma condensed balance sheet and as of December 31, 1995 and December
29, 1996, in the pro forma condensed statements of earnings for the year ended
December 28, 1996 and the six months ended June 30, 1997, respectively.
 
    The significant accounting policies followed by Kiewit Construction & Mining
Group, described in the notes to the historical financial statements included
elsewhere herein, have been used in preparing the accompanying pro forma
condensed financial statements.
 
2. STATEMENTS OF EARNINGS PRO FORMA ADJUSTMENTS
 
    As described in Note 1, the historical statements of earnings for the
Company have been adjusted to give effect to certain elements of the
Transaction. The adjustments made in preparation of the Company's pro forma
statements of earnings are described below:
 
        (a) Adjustments made to reflect the reduction in interest income from
    the use of cash and cash equivalents paid to Peter Kiewit Sons', Inc. upon
    exchange of 1.5 million shares of Class C Stock into Class D Stock in
    Scenario 1 and 3 million shares of Class C Stock into Class D Stock in
    Scenario 2. The interest rate used to calculate the reduction in interest
    income approximates the average rate earned by the Company during the
    periods.
 
        (b) Adjustments made to reflect tax effect of the above adjustments.
 
        (c) No adjustment has been made for the decrease in interest expense due
    to the assumed conversion of Class C Convertible Debentures into Class C
    Stock as the adjustment is not significant.
 
3. BALANCE SHEET PRO FORMA ADJUSTMENTS
 
    As described in Note 1, the historical balance sheet of the Company has been
adjusted to give effect to certain elements of the Transaction. The adjustments
made in preparation of the Company's pro forma condensed balance sheet are
described below:
 
        (a) Adjustments made to reflect the decrease in cash and cash
    equivalents as the result of the exchange of 1.5 million shares (Scenario 1)
    and 3 million shares (Scenario 2) of Class C Stock at the prior year end
    stock prices and conversion ratios, adjusted for dividends declared during
    the six months ended June 30, 1997.
 
        (b) Adjustments to record the accrual of certain estimated United States
    Federal income taxes expected to be incurred as a result of the Transaction.
 
        (c) Adjustment to reflect the tax effect of adjustment (d) below.
 
                                      F-40
<PAGE>
                       KIEWIT CONSTRUCTION & MINING GROUP
 
         NOTES TO PRO FORMA CONDENSED FINANCIAL STATEMENTS (CONTINUED)
 
3. BALANCE SHEET PRO FORMA ADJUSTMENTS (CONTINUED)
        (d) Adjustments made to record the accrual of certain estimated
    expenses, including costs for the Canadian Class C Shareholders, the
    modification of the conversion terms of the Debentures, and legal and other
    professional fees, incurred as a result of the Transaction.
 
        (e) Adjustments made to reflect conversion of Class C Convertible
    Debentures to Class C Stock.
 
4. EARNINGS PER SHARE
 
    Primary and fully diluted earnings per share of common stock have been
computed using the weighted average number of shares outstanding during each
period after giving effect to common stock equivalents and other dilutive
securities.
 
                                      F-41
<PAGE>
                                   APPENDIX A
                            BUSINESS OF PKS HOLDINGS
 
CONSTRUCTION OPERATIONS
 
    The Construction Group's business is conducted by operating subsidiaries of
KCG, which is a direct, wholly owned subsidiary of PKS. Prior to the Share
Exchange, PKS will contribute all of the capital stock of KCG to PKS Holdings,
and KCG will become a wholly owned subsidiary of PKS Holdings. Immediately
following the Transaction, PKS Holdings will be renamed "Peter Kiewit Sons',
Inc."
 
    The Construction Group and its joint ventures perform construction services
for a broad range of public and private customers primarily in the United States
and Canada. PKS Holdings contract awards during 1996 were distributed among the
following construction markets: transportation (including highways, bridges,
airports, railroads, and mass transit)--45%, dams and reservoirs--17%,
commercial buildings--16%, sewage and waste disposal--12%, power, heat,
cooling--4%, water supply--2%, and mining-- 2%.
 
    The Construction Group primarily performs its services as a general
contractor. As a general contractor, the Construction Group is responsible for
the overall direction and management of construction projects and for completion
of each contract in accordance with terms, plans, and specifications. The
Construction Group plans and schedules the projects, procures materials, hires
workers as needed, and awards subcontracts. The Construction Group generally
requires performance and payment bonds or other assurances of operational
capability and financial capacity from its subcontractors.
 
    CONTRACT TYPES.  The Construction Group performs its construction work under
various types of contracts, including fixed unit or lump-sum price, guaranteed
maximum price, and cost-reimbursable contracts. Contracts are either
competitively bid and awarded or negotiated. The Construction Group's public
contracts generally provide for the payment of a fixed price for the work
performed. Profit on a fixed-price contract is realized on the difference
between the contract price and the actual cost of construction, and the
contractor bears the risk that it may not be able to perform all the work for
the specified amount. Construction contracts generally provide for progress
payments as work is completed, with a retainage to be paid when performance is
substantially complete. Construction contracts frequently contain penalties or
liquidated damages for late completion and infrequently provide bonuses for
early completion.
 
    GOVERNMENT CONTRACTS.  Public contracts accounted for 79% of the combined
prices of contracts awarded to the Construction Group during 1996. Most of these
contracts were awarded by government and quasi-government units under fixed
price contracts after competitive bidding. Most public contracts are subject to
termination at the election of the government. In the event of termination, the
contractor is entitled to receive the contract price on completed work and
payment of termination related costs.
 
    BACKLOG.  At the end of 1996, the Construction Group had backlog
(anticipated revenue from uncompleted contracts) of $2.3 billion, an increase
from $2.0 billion at the end of 1995. Of current backlog, $700 million is not
expected to be completed during 1997. In 1996 the Construction Group was low
bidder on 284 jobs with total contract prices of $1.8 billion, an average price
of $6.4 million per job. There were 15 new projects with contract prices over
$25 million, accounting for 45% of the successful bid volume.
 
    COMPETITION.  A contractor's competitive position is based primarily on its
prices for construction services and its reputation for quality, timeliness,
experience, and financial strength. The markets served by the Construction Group
are competitive and require substantial resources. The construction industry is
highly competitive and lacks firms with dominant market power. In 1996
ENGINEERING NEWS RECORD, a construction trade publication, ranked the
Construction Group as the 9th largest U.S. contractor in terms of 1995 revenue
and 11th largest in terms of 1995 contract awards. It ranked the Construction
Group first in the transportation market and first in the heavy construction
category, in terms of 1995 revenue. The
 
                                      A-1
<PAGE>
U.S. Department of Commerce reports that the total value of construction put in
place in 1996 was $569 billion. The Construction Group's U.S. revenues for the
same period were $2.0 billion, or 0.4% of the total domestic market.
 
    JOINT VENTURES.  The Construction Group frequently enters into joint
ventures to allocate efficiently expertise and resources among the venturers and
to spread risks associated with particular projects. In most joint ventures, if
one venturer is financially unable to bear its share of expenses, the other
venturers may be required to pay those costs. The Construction Group prefers to
act as the sponsor of its joint ventures. The sponsor generally provides the
project manager, the majority of venturer-provided personnel, and accounting and
other administrative support services. The joint venture generally reimburses
the sponsor for such personnel and services on a negotiated basis. The sponsor
is generally allocated a majority of the venture's profits and losses and
usually has a controlling vote in joint venture decision making. In 1996 the
Construction Group derived 75% of its joint venture revenue from sponsored joint
ventures and 25% from non-sponsored joint ventures. The Construction Group's
share of joint venture revenue accounted for 30% of its 1996 total revenue.
 
    DEMAND.  The volume and profitability of the Construction Group's
construction work depends to a significant extent upon the general state of the
economies of the United States and Canada, and the volume of work available to
contractors. Fluctuating demand cycles are typical of the industry, and such
cycles determine to a large extent the degree of competition for available
projects. The Construction Group's construction operations could be adversely
affected by labor stoppages or shortages, adverse weather conditions, shortages
of supplies, or governmental action. The volume of available government work is
affected by budgetary and political considerations. A significant decrease in
the amount of new government contracts, for whatever reasons, would have a
material adverse effect on the Construction Group.
 
    LOCATIONS.  The Construction Group structures its construction operations
around 19 principal operating offices located throughout the U.S. and Canada,
with headquarters in Omaha, Nebraska. Through its decentralized system of
management, the Construction Group has been able to quickly respond to changes
in the local markets. At the end of 1996, the Construction Group had current
projects in 32 states and 6 provinces. The Construction Group also participates
in the construction of geothermal power plants in the Philippines and Indonesia.
 
    PROPERTIES.  The Construction Group has 19 district offices, of which 15 are
in owned facilities and four are leased. The Construction Group owns or leases
numerous shops, equipment yards, storage facilities, warehouses, and
construction material quarries. Since construction projects are inherently
temporary and location-specific, the Construction Group owns approximately 800
portable offices, shops, and transport trailers. The Construction Group has a
large equipment fleet, including approximately 3,000 trucks, pickups, and
automobiles, and 1,500 heavy construction vehicles, such as graders, scrapers,
backhoes, and cranes.
 
    MASS. ELECTRIC CONSTRUCTION CO.  On July 1, 1997, Kiewit Construction
Company ("KCC") increased its ownership interest in ME Holding Inc. from 49% to
80%. ME Holding Inc. owns all of the outstanding shares of Mass. Electric
Construction Co., a national electric contracting firm. KCC purchased certain
shares from an individual shareholder for $4.6 million. In addition, ME Holding
Inc. paid $22.7 million in redemption of shares held by individuals, effectively
contracting the net worth of the company.
 
MINING AND MATERIALS OPERATIONS
 
    Several of the Construction Group subsidiaries, primarily in Arizona and
Oregon, produce construction materials, including ready-mix concrete, asphalt,
sand and gravel. The Construction Group also has quarrying operations in New
Mexico and Wyoming, which produce landscaping materials and railroad
 
                                      A-2
<PAGE>
ballast. Kiewit Mining Group, Inc., a subsidiary within the Construction Group,
provides mine management services to Kiewit Coal Properties, Inc., a subsidiary
within the Diversified Group.
 
    OAK MOUNTAIN ENERGY L.L.C.  Effective February 18, 1997, Kiewit Alabama
Mining Company (a wholly owned subsidiary of Kiewit Mining Group Inc.) ("Kiewit
Alabama") and Simba Group, Inc. (a subsidiary of Anker Coal Group, Inc.)
("Simba") formed Shelby Energy Group, L.L.C. ("Shelby"). Kiewit Alabama
contributed $10 million for its interest in Shelby. Kiewit Alabama and Simba
hold equal interests in Shelby, which in turn holds a 94% interest in Oak
Mountain Energy L.L.C. ("Oak Mountain"). Oak Mountain owns and operates an
underground coal mine near Pelham, Alabama, which principally serves Alabama
Power Company.
 
EMPLOYEES
 
    As of December 31, 1996, the Construction Group employed approximately
11,700 employees.
 
PROPERTIES
 
    The Construction Group considers its properties to be adequate for its
present and foreseeable requirements.
 
LEGAL PROCEEDINGS OF THE CONSTRUCTION GROUP
 
    The Construction Group is party to many pending legal proceedings. It is not
believed that any resulting liabilities for legal proceedings, beyond amounts
reserved, will materially affect the financial condition, future results of
operations, or future cash flows of the Construction Group.
 
                                      A-3
<PAGE>
                                   APPENDIX B
                        BUSINESS OF DIVERSIFIED HOLDINGS
 
    The Diversified Group engages in the information services,
telecommunications, coal mining and energy businesses, through ownership of
operating subsidiaries, joint venture investments and ownership of substantial
positions in public companies. The Diversified Group's information business is
conducted through PKSIS and its other businesses are conducted through
subsidiaries of KDG.
 
COAL MINING
 
    KDG is engaged in coal mining through its subsidiary, KCP. KCP has a 50%
interest in three mines, which are operated by KCP. Decker Coal Company
("Decker") is a joint venture with Western Minerals, Inc., a subsidiary of The
RTZ Corporation PLC. Black Butte Coal Company ("Black Butte") is a joint venture
with Bitter Creek Coal Company, a subsidiary of Union Pacific Resources Group
Inc. Walnut Creek Mining Company ("Walnut Creek") is a general partnership with
Phillips Coal Company, a subsidiary of Phillips Petroleum Company. The Decker
Mine is located in southeastern Montana, the Black Butte Mine is in southwestern
Wyoming, and the Walnut Creek Mine is in east-central Texas.
 
    PRODUCTION AND DISTRIBUTION.  The coal mines use the surface mining method.
During surface mining operations, topsoil is removed and stored for later use in
land reclamation. After removal of topsoil, overburden in varying thicknesses is
stripped from above coal seams. Stripping operations are usually conducted by
means of large, earth-moving machines called draglines, or by fleets of trucks,
scrapers and power shovels. The exposed coal is fractured by blasting and is
loaded into haul trucks or onto overland conveyors for transportation to
processing and loading facilities. Coal delivered by rail from Decker originates
on the Burlington Northern Railroad. Coal delivered by rail from Black Butte
originates on the Union Pacific Railroad. Coal is also hauled by trucks from
Black Butte to the nearby Jim Bridger Power Plant. Coal is delivered by trucks
from Walnut Creek to the adjacent facilities of the Texas-New Mexico Power
Company.
 
    CUSTOMERS.  The coal is sold primarily to electric utilities, which burn
coal in order to produce steam to generate electricity. Approximately 92% of
sales are made under long-term contracts, and the remainder are made on the spot
market. Approximately 80%, 80%, and 71% of KCP's revenues in 1996, 1995, and
1994, respectively, were derived from long-term contracts with Commonwealth
Edison Company (with Decker and Black Butte) and The Detroit Edison Company
(with Decker). The primary customer of Walnut Creek is the Texas-New Mexico
Power Company.
 
    CONTRACTS.  Customers enter into long-term contracts for coal primarily to
secure a reliable source of supply at a predictable price. KCP's major long-term
contracts have remaining terms ranging from 1 to 31 years. A majority of KCP's
long-term contracts provide for periodic price adjustments. The price is
typically adjusted through the use of various indices for items such as
materials, supplies, and labor. Other portions of the price are adjusted for
changes in production taxes, royalties, and changes in cost due to new
legislation or regulation, and in most cases, such cost items are directly
passed through to the customer as incurred. In most cases the price is also
adjusted based on the heating content of the coal.
 
    Decker has a sales contract with Detroit Edison Company which provides for
the delivery of a minimum of 42 million tons of low sulphur coal during the
period 1997 through 2005, with annual shipments ranging from 5.2 million tons in
1997 to 1.7 million tons in 2005.
 
    KCP and its mining ventures have entered into various agreements with
Commonwealth Edison Company ("Commonwealth") which stipulate delivery and
payment terms for the sale of coal. The agreements as amended provide for
delivery of 100 million tons during the period 1997 through 2014, with annual
shipments ranging from 1.8 million tons to 13.1 million tons. These deliveries
include 20 million tons of coal reserves previously sold to Commonwealth. Since
1993, the amended contract between Commonwealth and Black Butte provides that
Commonwealth's delivery commitments will be satisfied, not with coal produced
from the Black Butte mine, but with coal purchased from three unaffiliated mines
in the Powder River Basin of Wyoming. The contract amendment allows Black Butte
to purchase alternate source coal at a price below its production costs, and to
pass the cost savings through to Commonwealth while maintaining the profit
margins available under the original contract.
<PAGE>
    The contract between Walnut Creek and Texas-New Mexico Power Company
provides for delivery of between 42 and 90 million tons of coal during the
period 1989 through 2027. The actual tons provided will depend on the number of
power units constructed and operated by TNP. The maximum amount KCP is expecting
to ship in any one year is between 1.6 and 3.2 million tons.
 
    KCP also has other sales commitments, including those with Sierra Pacific,
Idaho Power, Solvay Minerals, Pacific Power & Light, Minnesota Power, and
Mississippi Power, that provide for the delivery of approximately 18 million
tons through 2005.
 
    COAL PRODUCTION.  Coal production began at the Decker, Black Butte, and
Walnut Creek mines in 1972, 1979, and 1989, respectively. KCP's share of coal
mined in 1996 at the Decker, Black Butte, and Walnut Creek mines was 5.5, 0.9,
and 1.0 million tons, respectively.
 
    REVENUE.  KCP's total revenue in 1996 was $234 million. Revenue attributable
to the Decker, Black Butte, and Walnut Creek entities was $113 million, $101
million, and $18 million, respectively.
 
    Under a 1992 mine management agreement, KCP pays a Construction Group
subsidiary an annual fee equal to 30% of KCP's adjusted operating income. The
fee in 1996 was $37 million.
 
    BACKLOG.  At the end of 1996, the backlog of coal to be sold under KCP's
long-term contracts was approximately $1.6 billion, based on December 1996
market prices. Of this amount, $206 million is expected to be sold in 1997.
 
    RESERVES.  At the end of 1996, KCP's share of assigned coal reserves at
Decker, Black Butte, and Walnut Creek was 118, 40, and 32 million tons,
respectively. Of these amounts, KCP's share of the committed reserves of Decker,
Black Butte, and Walnut Creek was 51.9, 3.6, and 23.8 million tons,
respectively. Assigned reserves represent coal which can be mined using KCP's
current mining practices. Committed reserves (excluding alternate source coal)
represent KCP's maximum contractual amounts. These coal reserve estimates
represent total proved and probable reserves.
 
    LEASES.  The coal reserves and deposits of the mines are held pursuant to
leases with the federal government through the Bureau of Land Management, with
two state governments (Montana and Wyoming), and with numerous private parties.
 
    COMPETITION.  The coal industry is highly competitive. KCP competes not only
with other domestic and foreign coal suppliers, some of whom are larger and have
greater capital resources than KCP, but also with alternative methods of
generating electricity and alternative energy sources. In 1995, KCP's production
represented 1.4% of total U.S. coal production. Demand for KCP's coal is
affected by economic, political and regulatory factors. For example, recent
"clean air" laws may stimulate demand for low sulphur coal. KCP's western coal
reserves generally have a low sulphur content (less than 1%) and are currently
useful principally as fuel for coal-fired steam-electric generating units.
 
    KCP's sales of its western coal, like sales by other western coal producers,
typically provide for delivery to customers at the mine. A significant portion
of the customer's delivered cost of coal is attributable to transportation
costs. Most of the coal sold from KCP's western mines is currently shipped by
rail to utilities outside Montana and Wyoming. The Decker and Black Butte mines
are each served by a single railroad. Many of their western coal competitors are
served by two railroads and such competitors' customers often benefit from lower
transportation costs because of competition between railroads for coal hauling
business. Other western coal producers, particularly those in the Powder River
Basin of Wyoming, have lower stripping ratios (I.E., the amount of overburden
that must be removed in proportion to the amount of minable coal) than the Black
Butte and Decker mines, often resulting in lower comparative costs of
production. As a result, KCP's production costs per ton of coal at the Black
Butte and Decker mines can be as much as four and five times greater than
production costs of certain competitors. KCP's production cost disadvantage has
contributed to its agreement to amend its long-term contract with Commonwealth
Edison Company to provide for delivery of coal from alternate source mines
rather than
 
                                      B-2
<PAGE>
from Black Butte. Because of these cost disadvantages, KCP does not expect that
it will be able to enter into long-term coal purchase contracts for Black Butte
and Decker production as the current long-term contracts expire. In addition,
these cost disadvantages may adversely affect KCP's ability to compete for spot
sales in the future.
 
    ENVIRONMENTAL REGULATION.  PKS is required to comply with various federal,
state and local laws and regulations concerning protection of the environment.
KCP's share of land reclamation expenses in 1996 was $5 million. KCP's share of
accrued estimated reclamation costs was $99 million at the end of 1996. PKS does
not expect to make significant capital expenditures for environmental compliance
in 1997. PKS believes its compliance with environmental protection and land
restoration laws will not affect its competitive position since its competitors
in the mining industry are similarly affected by such laws.
 
CALENERGY COMPANY, INC.
 
    CalEnergy develops, owns, and operates electric power production facilities,
particularly those using geothermal resources, in the United States, the
Philippines, and Indonesia. In December 1996, CalEnergy and KDG acquired
Northern Electric plc, an English electric utility company. CalEnergy is a
Delaware corporation formed in 1971 and has its headquarters in Omaha, Nebraska.
CalEnergy common stock is traded on the New York, Pacific, and London Stock
Exchanges. In 1996, CalEnergy had revenue of $576 million and net income of $92
million. At the end of 1996, CalEnergy had total assets of $5.7 billion, debt of
$3.0 billion, and stockholders' equity of $881 million.
 
    KIEWIT'S SHARE.  At the end of 1996, KDG owned approximately 30% of the
common stock of CalEnergy. Under generally accepted accounting principles, an
investor owning between 20% and 50% of a company's equity, generally uses the
equity method. Under the equity method, KDG reports its proportionate share of
CalEnergy's earnings, even though it has received no dividends from CalEnergy.
KDG keeps track of the carrying value of its CalEnergy investment. "Carrying
value" is the purchase price of the investment, plus the investor's
proportionate share of the investee's earnings, less the amortized portion of
goodwill, less any dividends paid. KDG purchased most of its CalEnergy shares at
a premium over the book value of CalEnergy's underlying net assets. This premium
will be amortized over a period of 20 years. The current carrying value of KDG's
CalEnergy shares is $292 million. KDG owns 19.2 million CalEnergy common shares,
which had a market value of $644 million, based on the 1996 year-end price of
$33.50 per share on the New York Stock Exchange.
 
    During 1996, KDG converted $66 million of CalEnergy debentures into 3.6
million CalEnergy shares and purchased 4.8 million shares for $53 million (by
exercising 1.5 million options at $9 per share and 3.3 million options at $12
per share). KDG retains one million options to purchase CalEnergy stock at
$11.625 per share. These options expire in 2001.
 
    ACQUISITIONS.  In the last two years, CalEnergy has made three significant
acquisitions, in addition to the recent $1.3 billion acquisition of Northern
Electric plc (described below). In January 1995, CalEnergy acquired Magma Power
Company ("Magma"), a publicly traded United States independent power producer,
for approximately $958 million. The Magma acquisition, combined with CalEnergy's
previously existing assets, made CalEnergy the largest independent geothermal
power producer in the world today (based on CalEnergy's estimate of electric
generating capacity in operation and under construction). In April 1996,
CalEnergy completed the buy-out for approximately $70 million of its partner's
interests in four electric generating plants in Southern California. In August
1996, CalEnergy acquired Falcon Seaboard Resources, Inc. for approximately $226
million, thereby acquiring significant ownership in three natural gas-fired
electric cogeneration facilities located in New York, Texas and Pennsylvania and
a related gas transmission pipeline.
 
    POWER GENERATION PROJECTS.  Power generation facilities are measured in
terms of megawatts (MW) of net electric generating capacity. Most of CalEnergy's
facilities are co-owned and CalEnergy's fractional
 
                                      B-3
<PAGE>
ownership interest can be expressed in terms of MWs. CalEnergy has projects in
three stages: operational (and managed by CalEnergy), under construction (and
financed), and developmental (with executed and awarded power sales contracts).
CalEnergy owns (i) 1,309 MW in 20 operating facilities with 3,201 MW of
capacity, (ii) 314 MW in 5 projects under construction, with 564 MW of capacity
and (iii) 573 MW in 6 development stage projects, with 1,260 MW of capacity. KDG
has a separate ownership interest in some of the international projects. KDG
owns (i) 87 MW in the projects in operation, (ii) 159 MW in the projects under
construction and (iii) 458 MW in the Indonesian development stage projects.
 
    OPERATIONS--U.S. GEOTHERMAL PLANTS.  Most of CalEnergy's operating revenues
come from geothermal power plants in Southern California, three in the Coso area
and eight in the Imperial Valley. CalEnergy has ownership interests of 46%, 48%,
and 50% in the three Coso plants. Following the 1996 acquisition of the
remaining 50% interests in four Imperial Valley projects for $70 million,
CalEnergy is now the full owner of the eight Imperial Valley projects.
Operations of the Salton Sea Unit IV in the Imperial Valley began in 1996,
following completion of construction.
 
    These twelve geothermal plants have certain common features. CalEnergy is
the operator of each plant. Each plant has a long-term contract to supply
electric power to Southern California Edison Company ("Edison"). The agreements
provide for both capacity payments and energy payments for a term of between 20
and 30 years. During the first ten years, energy payments are based on a pre-set
schedule. Thereafter, while the basis for the capacity payment remains the same,
the required energy payment is Edison's then-current published "avoided cost of
energy" as determined by the California Public Utility Commission. The initial
ten-year periods expire beginning in 1996 for the first plant and in 2000 for
the last plant. CalEnergy cannot predict the likely level of Edison's avoided
cost of energy prices at the expiration of the fixed-price periods, but it is
currently substantially below the current energy prices under CalEnergy's
contracts. For 1996, the time period-weighted average of Edison's avoided cost
of energy was 2.5 cents per kWh, compared to CalEnergy's comparable selling
price for energy of 11.3 cents per kWh. Thus, the revenue generated by each of
CalEnergy's facilities is likely to decline significantly after the expiration
of the fixed-price period.
 
    CalEnergy also owns and operates two geothermal operating plants, one each
in Utah and Nevada.
 
    OPERATIONS--U.S. GAS-FIRED PLANTS.  In August 1996 CalEnergy completed the
acquisition of Falcon Seaboard Resources, Inc., including its ownership interest
in three operating gas-fired cogeneration plants located in New York, Texas and
Pennsylvania and a related natural gas pipeline, also located in New York, for a
cash purchase price of $226 million. The three cogeneration facilities total 520
MW in capacity and sell power under long-term power purchase agreements.
CalEnergy also owns and operates a 50 MW gas-fired cogeneration facility in
Yuma, Arizona.
 
    OPERATIONS--PHILIPPINES GEOTHERMAL.
 
    UPPER MAHIAO.  Construction of the Upper Mahiao Project was completed in
June 1996. The project operating company is receiving full capacity payments
under the "take or pay" provisions of the contract pending completion by the
national power company of a full transmission line. The plant is presently
delivering up to 40 MW over interim transmission lines.
 
    In 1994, construction began on the Upper Mahiao Project, a 119 gross MW
geothermal project on the Philippine island of Leyte. The project was built by
and is owned and operated by CE Cebu Geothermal Power Company, Inc. ("CE Cebu"),
a Philippine corporation owned by CalEnergy. The project will sell 100% of its
capacity on a "take-or-pay" basis to PNOC-Energy Development Corporation
("PNOC"), which will in turn sell the power to the National Power Corporation of
the Philippines ("NPC"), for distribution to the island of Cebu, located 40
miles west of Leyte. NPC is the government-owned and controlled corporation that
is the primary supplier of electricity in the Philippines. The project was
started by Magma, prior to its acquisition by CalEnergy. KDG has no separate
ownership interest in this project and the Construction Group was not involved
in construction.
 
                                      B-4
<PAGE>
    The total project cost was $218 million. A consortium of international banks
provided approximately $162 million in project-financed construction loans,
supported by political risk insurance from the Export-Import Bank of the United
States ("Ex-Im Bank"). The construction loan is expected to be converted to a
term loan promptly after NPC completes the full capacity transmission line,
which is expected to occur in 1997. The largest portion of the term loan for the
project will also be provided by Ex-Im Bank. CalEnergy's equity contribution to
the project is $56 million. Subject to the pledge of the project company's stock
to the lenders, CalEnergy has arranged for political risk insurance of its
equity investment through Overseas Private Investment Corporation ("OPIC"). The
financing is collateralized by all the assets of the project.
 
    Under the terms of an energy conversion agreement (the "ECA"), executed in
September 1993, CE Cebu will own and operate the project for ten years, after
which the facility will be transferred to PNOC at no cost. The project is
located on land provided by PNOC at no cost. CE Cebu will take geothermal steam
and fluid, also provided by PNOC at no cost, and convert its thermal energy into
electrical energy to be sold to PNOC on a "take-or-pay" basis. Specifically,
PNOC will be obligated to pay for the electric capacity, even if PNOC is unable
to accept delivery of the electricity. PNOC will pay to CE Cebu a capacity fee
(which, at the plant's design capacity, is approximately 95% of total contract
revenues) and an energy fee based on the electricity actually delivered to PNOC
(approximately 5% of total contract revenues). The capacity fee serves to
recover the capital costs of the project, to recover fixed operating costs, and
to cover return on investment. The energy fee is designed to cover all variable
operating and maintenance costs of the power plant. Payments under the ECA will
be denominated in U.S. dollars, or computed in U.S. dollars and paid in
Philippine pesos at the then-current exchange rate, except for the energy fee,
which will be used to pay Philippine peso-denominated expenses. Significant
portions of the fees will be indexed to U.S. and Philippine inflation rates.
PNOC's obligations are supported by the Philippine government through a
performance undertaking.
 
    MALITBOG.  In 1994, CalEnergy started construction of the Malitbog Project,
a 216 net MW geothermal project consisting of three 72 net MW units, located on
the island of Leyte. The project is being built, and will be owned and operated
by Visayas Geothermal Power Company ("VGPC"), which is wholly owned by
CalEnergy. Unit I of the Malitbog facility was "deemed complete" by PNOC in July
1996, meaning that construction of the first 72 net MW unit was completed on
time but the required transmission line was not completed and provided to VGPC.
During deemed completion, PNOC is required to pay, and in fact has been paying,
capacity fees under the "take or pay" provisions of the contract. VGPC is
selling 100% of its capacity on substantially the same basis as described above
for the Upper Mahiao Project to PNOC, which will in turn sell the power to NPC.
This project was started by Magma, prior to its acquisition by CalEnergy. KDG
has no separate ownership interest in this project and the Construction Group
has not participated in construction.
 
    The Malitbog Project has a total project cost of approximately $280 million,
including interest during construction and project contingency costs. A
consortium of international banks and OPIC have provided a total of $210 million
of construction and term loan facilities, the $135 million international bank
portion of which is supported by political risk insurance from OPIC. CalEnergy's
equity contribution to VGPC was $70 million. CalEnergy's equity participation is
covered by political risk insurance from OPIC.
 
    Units II and III of the Malitbog Project are being constructed by Sumitomo
Corporation, of Japan, pursuant to a fixed-price, date-certain, turnkey supply
and construction contract. Commercial operation of Units II and III are
scheduled to commence in July 1997. The Malitbog ECA is similar to the Upper
Mahiao ECA described above. All facilities (Units I, II, and III) will be
transferred to PNOC ten years after commercial operations begin on Unit III.
 
    OPERATIONS--ENGLAND.
 
    See discussion under heading "International Energy--Northern Electric
Acquisition" below.
 
                                      B-5
<PAGE>
    CONSTRUCTION--PHILIPPINES AND INDONESIA.
 
    See discussion of the Mahanagdong, Casecnan, and Dieng projects under the
heading "International Energy" below.
 
    GEOTHERMAL POWER PRODUCTION PROCESS.  Until 1996, almost all of CalEnergy's
projects were geothermal projects. The following is a summary of the geothermal
power production process. First, the developer locates suitable geothermal
resources, drills test wells, secures permits, negotiates long-term power
contracts with an electric utility, and arranges financing. Second, the project
is constructed. Third, the facility is operated and maintained. Project revenues
from the sale of electricity are applied to operating costs, rent or royalties,
and principal and interest payments on debt incurred for acquisition and
construction costs. Geothermal resources suitable for commercial extraction
require an underground water reservoir heated to high temperatures. Production
wells are drilled to release the heated fluid under high pressure. Wells are
usually located within one or two miles of the power plant. From well heads,
fluid flows through pipelines to a series of separators where it is separated
into water, brine, and steam. The steam is passed through a turbine which drives
a generator to generate electricity. Once the steam has passed through the
turbine, it is then cooled and condensed back into water which is reinjected
through wells back into the geothermal reservoir. Under proper conditions, the
geothermal power is a renewable energy source, with minimal emissions compared
to fossil fuel power plants. The utilization of geothermal power is preferred by
certain governments in order to minimize the import (E.G., the Philippines), or
maximize the export (E.G., Indonesia) of hydrocarbons. Geothermal power
facilities presently enjoy federal tax benefits and favorable utility regulatory
treatment in the United States.
 
INTERNATIONAL ENERGY
 
    KDG is an investor with CalEnergy in power projects in the Philippines and
Indonesia and in an electric utility company in England. In each case, KDG has a
direct equity interest and also benefits indirectly as a 30% stockholder in
CalEnergy.
 
    KDG and CalEnergy have a joint venture agreement regarding international
energy projects. If both KDG and CalEnergy agree to participate in a project,
they will share equally development costs and equity required for financing the
project. On a project by project basis, CalEnergy will be the development
manager, managing partner and/or project operator. The agreement expires in
2001.
 
    MAHANAGDONG.  In 1994 construction began on the Mahanagdong Project, a 165
gross MW geothermal project on the Philippine island of Leyte. The project will
be built, owned and operated by CE Luzon Geothermal Power Company, Inc. ("CE
Luzon"), a Philippine corporation that during construction is owned 50% by
CalEnergy and 50% by KDG. After construction, another industrial company has an
option to buy up to a 10% financial interest in CE Luzon. The project will sell
100% of its capacity on a "take-or-pay" basis to PNOC, which will in turn sell
the power to NPC, for distribution to the island of Leyte.
 
    The total project cost is $320 million, including interest during
construction, project contingency costs and a debt service reserve fund. The
capital structure consists of a project financing construction and term loan of
$240 million provided by OPIC, Ex-Im Bank, and a consortium of international
banks, and approximately $80 million in equity contributions. KDG and CalEnergy
must make equity contributions of $40 million each. KDG and CalEnergy have
arranged for political risk insurance on their equity investments through OPIC.
Political risk insurance from Ex-Im Bank has been obtained for the commercial
lenders. The financing is collateralized by all of the assets of the project.
The project is being constructed by the Construction Group under fixed-price,
date-certain, turnkey supply and construction contracts. Construction was
completed during the first half of 1997.
 
                                      B-6
<PAGE>
    The terms of an energy conversion agreement (the "ECA") are substantially
similar to those of the Upper Mahiao ECA, described above. The ECA provides for
an approximately three-year construction period and a ten-year operations
period. At the end of the operations period, the facility will be transferred to
PNOC at no cost. All of PNOC's obligations under the Mahanagdong ECA are
supported by the Philippine government through a performance undertaking. The
capacity fees are expected to be approximately 97% of total revenues at the
design capacity levels and the energy fees are expected to be approximately 3%
of total revenues.
 
    CASECNAN.  In November 1995, CE Casecnan Water and Energy Company, Inc., a
Philippine corporation ("CE Casecnan") started construction on a combined
irrigation and 150 gross MW hydroelectric power generation project (the
"Casecnan Project") located in the central part of the Philippine island of
Luzon. The project will include diversion structures in the Casecnan and Denip
Rivers that will divert water into a 14 mile long tunnel. The tunnel will
transfer the water from the Casecnan and Denip Rivers into the Pantabangan
Reservoir for irrigation and hydroelectric use in the Central Luzon area. An
underground powerhouse at the end of the water tunnel will house a power plant
with 150 MW capacity. A two mile long tailrace tunnel will deliver water from
the water tunnel and the new powerhouse to the Pantabangan Reservoir.
 
    The project is being developed under a project agreement between CE Casecnan
and the National Irrigation Administration ("NIA"). CalEnergy and KDG have
minimum and maximum ownership interests in CE Casecnan of 35% to 50% each. Two
other Stockholders, who have no financial commitments and will not participate
in construction or operations, may receive interests of as much as 15% each,
depending on projected returns from the project.
 
    The total project cost is $495 million, funded by bonds issued by CE
Casecnan of $371 million and equity contributions of $62 million each from KDG
and CalEnergy. KDG also holds $20 million of the project bonds. Under the
project agreement, CE Casecnan developed, financed, and is constructing the
project over an originally estimated four-year construction period, and will
thereafter own and operate the project for a 20-year operations period. During
the operating period, NIA is obligated to accept all deliveries of water and
energy, and NIA will pay the CE Casecnan a guaranteed fee for the delivery of
water and a guaranteed fee for the delivery of electricity, regardless of the
amount of water or electricity actually delivered. In addition, NIA will pay a
fee for all electricity delivered in excess of a threshold amount. NIA will sell
the electric energy it purchases to NPC. All fees to be paid by NIA to CE
Casecnan are payable in U.S. dollars. The guaranteed fees for the delivery of
water and energy are expected to provide approximately 70% of CE Casecnan's
revenues. At the end of the 20-year period, the project will be transferred to
NIA and NPC for no additional consideration on an "as is" basis. The Philippine
government has provided a performance undertaking under which NIA's obligations
under the project agreement are guaranteed by the full faith and credit of the
Philippine government.
 
    The Casecnan Project is being constructed on a joint and several basis by
Hanbo Corporation and Hanbo Engineering & Construction Co. Ltd. ("HECC")
(together "Contractor"), both of which are South Korean corporations and are
under common ownership. The Contractor's obligations under the construction
contract are guaranteed by Hanbo Iron & Steel Company, Ltd. ("Hanbo Steel"), a
large South Korean steel company. In addition, the Contractor's obligations are
secured by an unconditional, irrevocable, standby letter of credit issued by
Korea First Bank ("KFB") in the approximate amount of $118 million. In January
1997, Hanbo Corporation, HECC and Hanbo Steel each filed to seek bankruptcy
protection in Korea. KFB's credit rating has been downgraded because of the
substantial loans it has made to Hanbo Steel.
 
    On May 7, 1997, Casecnan announced that it had terminated the Hanbo Contract
and had entered into a new engineer, procure and construct contract to complete
the construction of the project (the "Replacement Contract"). The work under the
Replacement Contract will be conducted by a consortium of contractors and
subcontractors including Siemens A.G., Sulzer Hydro Ltd., Black & Veatch and
 
                                      B-7
<PAGE>
Colenco Power Engineering Ltd., and will be headed by Cooperativa Muratori
Cementista CMC di Ravenna and Impressa Pizzarotti & C. Spa. The Hanbo Contract
was terminated because of events of default under that contract including the
fact that the Contractors had filed for court receivership protection in South
Korea. In connection with the contract termination, Casecnan made a $79 million
draw request under the letter of credit issued by KFB to pay for certain
transition costs and other damages under the Hanbo Contract. KFB failed to honor
the draw request and Casecnan filed suit in New York State Court. KFB funded,
pursuant to a court order, the $79 million into an interest bearing account at
an independent financial institution in the United States. This matter is still
unresolved. If KFB should fail to honor its obligations under the letter of
credit, such action may have a material adverse effect on the Casecnan project.
However, based on information available, KDG does not currently believe its
investment is impaired.
 
    DIENG.  In December 1994, Himpurnia California Energy Ltd. ("HCE") executed
a joint operation contract (the "JOC") for the development of the geothermal
steam field and geothermal power facilities at the Dieng geothermal field,
located in Central Java (the "Dieng Project") with Pertamina, the Indonesian
national oil company, and executed a "take-or-pay" energy sales contract (the
"ESC") with both Pertamina and PLN, the Indonesian national electric utility.
HCE and an Indonesian partner formed a joint venture to develop the Dieng
Project. CalEnergy, KDG, and the Indonesian partner have 47%, 47%, and 6%
interests, respectively, in the Dieng Project.
 
    Pursuant to the JOC and ESC, Pertamina has granted to HCE the geothermal
field and wells and other facilities presently located thereon and the HCE will
build, own, and operate the production units. HCE will accept the field
operation responsibility for developing and supplying the geothermal steam and
fluids required to operate the plants. The JOC is structured as a
build-own-transfer agreement and will expire (subject to extension by mutual
agreement) on the date which is the later of (i) 42 years following
effectiveness of the JOC and (ii) 30 years following the start of commercial
generation of the final unit completed. Upon the expiration of the JOC, all
facilities will be transferred to Pertamina at no cost. HCE is required to pay
Pertamina a production allowance equal to 3% of HCE's net operating income from
the Dieng Project, plus a further amount based upon the negotiated value of
existing Pertamina geothermal production facilities that are expected to be made
available by Pertamina.
 
    Pursuant to the ESC, PLN agreed to purchase and pay for all of the project's
capacity and energy output on a "take-or-pay" basis regardless of PLN's ability
to accept such energy made available from the Dieng Project for a term equal to
that of the JOC. The price paid for electricity includes a base energy price for
electricity the plants deliver or are "capable of delivering," whichever is
greater. Energy price payments are also subject to adjustment for inflation. PLN
will also pay a capacity payment based on plant capacity. All such payments are
payable in U.S. dollars.
 
    Construction by the Construction Group and CalEnergy of an initial 55 MW
unit began in 1996 and completion is scheduled for late 1997. The total project
cost of Dieng Unit I is $160 million, including equity contributed by KDG and
CalEnergy of $20 million each. Construction loan financing of $120 million was
closed in October 1996; $86 million from Credit Suisse and $34 million by an
entity owned equally by KDG and CalEnergy. Of the latter amount, KDG and
CalEnergy furnished $5 million each in 1996 and expect to furnish additional
funds in 1997. The Dieng field has been explored domestically for over 20 years
and CalEnergy has been active in the area for more than five years. Pertamina
has drilled a total of 27 wells to date. CalEnergy has a significant amount of
data, which it believes to be reliable as to the production capacity of the
field. However, a number of significant steps, both financial and operational,
must be completed before the Dieng Project can proceed further. These steps,
none of which can be assured, include completing the drilling of wells and the
constructing of the plant for Dieng Unit I and obtaining required regulatory
permits and approvals, completing the well testing, entering into a construction
agreement and other project contracts, and arranging financing for the other
units at Dieng. Up to three additional units at Dieng are planned, for which KDG
has incurred $16 million in development costs. It is anticipated that most of
the capital needed to construct and operate the Dieng projects and the
 
                                      B-8
<PAGE>
development stage projects described below will be raised by project-financed
debt, I.E., the loans will be repaid from revenues generated by the output of
the plants.
 
    DEVELOPMENT STAGE PROJECTS
 
    PATUHA.  CalEnergy and KDG are co-developing a geothermal power plant at the
Patuha geothermal field in Java, Indonesia. They intend to proceed on a modular
basis similar to the Dieng Project, with an aggregate capacity of up to 400 MW.
The total cost is estimated to be $1 billion. The Patuha Project remains subject
to a number of significant uncertainties, as described above in connection with
the Dieng Project, and there can be no assurance that the Patuha Project will
proceed or reach commercial operation.
 
    BALI.  CalEnergy and KDG are co-developing geothermal resources on the
island of Bali, Indonesia. They intend to proceed on a modular basis similar to
the Dieng Project, with an aggregate capacity of up to 400 MW. The total cost of
the Bali project is estimated to be $1 billion. CalEnergy presently intends to
begin well testing and exploration in early 1997 and expects to commence
construction of the first unit in 1998. CalEnergy presently intends to develop
the Bali Project and other possible projects in Indonesia using a structure
similar to that contemplated for the Dieng Project. The Bali Project remains
subject to a number of significant uncertainties, as described above for the
Dieng Project, and there can be no assurance that the Bali Project will proceed
or reach commercial operation. KDG has already incurred $17 million in
development costs for the Patuha and Bali projects.
 
    NORTHERN ELECTRIC ACQUISITION.  In the fall of 1996, CalEnergy and KDG took
the first steps toward expanding their international power businesses beyond the
power generation business through a tender offer for Northern Electric plc by CE
Electric UK plc, which is 70% owned by CalEnergy and 30% owned by KDG. In
December, CE Electric acquired majority ownership of Northern Electric. The
total amount expected to be paid for all Northern Electric's shares is
approximately $1.32 billion. CE Electric expects to acquire all the shares by
the end of March 1997. As of March 1997, CalEnergy and KDG have made equity
contributions to CE Electric of $410 million and $176 million, respectively. The
remaining funds necessary to complete the acquisition will be provided under a
term loan and revolving credit facility.
 
    Northern Electric is one of the twelve regional electricity companies
created by the privatization of the electricity industry in the United Kingdom
in 1990. Since the regional electric companies were privatized, all but one has
been acquired by companies, primarily from the United States, attracted both by
the regional electricity business and the strategic opportunity to participate
in a deregulated electricity market in advance of the coming deregulation of the
electricity distribution markets in the United States and worldwide. Northern
Electric is primarily engaged in the distribution and supply of electricity in
its authorized franchise area in northeast England. The area covers 5,560 square
miles with a population of 3.2 million people. The head office is at Newcastle
upon Tyne. For its fiscal year ended March 1996, Northern Electric had net
assets of $432 million (L276 million) and operating revenue of $1.4 billion
(L902 million).
 
    As noted above, CalEnergy and KDG expect to learn much through Northern
Electric about deregulated power markets. Northern Electric provides expertise
in supply, distribution, and marketing in such markets. These capabilities may
provide CalEnergy and KDG with an early competitive advantage in preparing for
electricity deregulation in the United States and foreign markets. The
acquisition further diversifies CalEnergy and KDG's energy businesses in terms
of location, type, risks, and earnings streams.
 
C-TEC CORPORATION
 
    C-TEC is a diversified international telecommunications and high technology
company with interests in local telephone, long-distance telephone, cable
television, and engineering and communications services. C-TEC is a Pennsylvania
corporation and has its headquarters in Princeton, New Jersey. C-TEC common
stock is traded on the Nasdaq National Market and the Class B Stock is quoted on
Nasdaq and traded over the counter. In 1996 C-TEC had revenue of $367 million,
EBITDA (earnings before, interest,
 
                                      B-9
<PAGE>
taxes, depreciation and amortization) of $134 million, and net income of $8
million. At year-end 1996, C-TEC had total assets of $917 million, long-term
debt of $205 million, and common stockholders' equity of $377 million. The five
operating divisions of C-TEC and their 1996 revenues are: C-TEC Cable Systems
($160 million), Commonwealth Telephone Company ($139 million), Commonwealth Long
Distance ($35 million), Commonwealth Communications ($29 million), and RCN
Telecom Services ($4 million).
 
    KIEWIT'S SHARE.  In 1993 KDG purchased a controlling interest in C-TEC.
Through a subsidiary, KDG owns 42% of the outstanding shares of C-TEC common
stock and 66% of the C-TEC Class B common stock. Holders of common stock are
entitled to one vote per share; holders of Class B stock are entitled to 15
votes per share. KDG thus owns 48% of the outstanding shares, but is entitled to
62% of the available votes. Since KDG has voting control, KDG must consolidate
C-TEC within its financial statements. On KDG's balance sheet, each asset and
liability of C-TEC is added to the similar items for the rest of KDG. The 52% of
C-TEC that it does not own is subtracted as a single item ("minority interest")
on KDG's balance sheet. KDG keeps track of the carrying value of its C-TEC
investment. "Carrying value" is the purchase price of shares plus the investor's
proportionate share of the investee's earnings less the amortized portion of
goodwill less any dividends paid. KDG's investment in C-TEC has a carrying value
of $355 million. The 1996 year-end public market value of KDG's 13.3 million
shares of C-TEC (at $23 5/8 per share of common and Class B stock) was $315
million.
 
    C-TEC CABLE SYSTEMS.  C-TEC Cable Systems is a cable television operator
with cable television systems located in New York, New Jersey, Michigan, and
Pennsylvania. The company owns and operates cable television systems serving
338,000 customers and is the majority owner and manager of cable television
systems with an additional 40,000 customers, ranking it among the top 25
multiple system operators in the United States. The company must periodically
seek renewal of franchise agreements from local government authorities. To date,
all of Cable Systems' franchises have been renewed or extended, generally at or
prior to their stated expirations and on acceptable terms. Competition for the
Cable Systems' services traditionally has come from providers of broadcast
television, video rentals, and direct broadcast satellite received on home
dishes. Future competition is expected from telephone companies.
 
    COMMONWEALTH TELEPHONE COMPANY.  Commonwealth Telephone Company is a
Pennsylvania public utility providing local telephone service to a 19 county,
5,067 square mile service territory in Pennsylvania. The telephone company
services 240,000 main access lines, an increase of 5.7% over 1995. The company
also provides network access, long distance, and billing and collection services
to interexchange carriers. The telephone company's business customer base is
diverse in size as well as industry, with very little concentration. The ten
largest business customers combined account for only 2.3% of revenue, with the
largest single customer accounting for only about 0.5%. The telephone company
sought and was granted status as a rural telephone company with respect to the
provisions of the Telecommunications Act of 1996. This status will afford
limited protection to the company's primarily rural customer base from a rapid
transition to local exchange competition. In January 1997, the Pennsylvania
Public Telephone Commission approved the company's "Petition for Alternative
Regulation and Network Modernization Plan," which will allow the company to move
from traditional rate of return regulation to a price cap formula in return for
a commitment to network modernization.
 
    COMMONWEALTH LONG DISTANCE.  Commonwealth Long Distance operates principally
in Pennsylvania. The company began operations in 1990 by servicing the local
service area of the Commonwealth Telephone Company. In 1992 and 1993, sales
offices were opened in other areas of Pennsylvania. During 1996, the company
continued statewide certification and is certified now in 47 states. The company
provides switched services, is a reseller of several types of services, and
employs the networks of several long distance providers on a wholesale basis.
 
    COMMONWEALTH COMMUNICATIONS.  Commonwealth Communications Inc. provides
telecommunications engineering and facilities management services to large
corporate clients, hospitals and universities throughout the Northeastern United
States and sells, installs and maintains PBX systems in Pennsylvania
 
                                      B-10
<PAGE>
and New Jersey. Commonwealth Communications also provides cable and data network
engineering and project management of network construction. This group is being
combined with Commonwealth Telephone Company and will focus on the Eastern
Pennsylvania market.
 
    RCN TELECOM SERVICES.  RCN Telecom Services provides local and long distance
telephone service, video programming and internet access to households located
in New York City and Boston. RCN currently has 417 signed building access
agreements which represent 82,733 households located in high density housing
such as co-ops, condominiums and apartment complexes in the Boston and New York
markets. RCN has 36,545 video programming customers, 2,968 telephone customers
and 58 Internet customers in these two markets. RCN also has 4,474 video
programming customers at the University of Delaware.
 
    RCN's New York system operates two cable programming delivery systems: one
that is fiber-based and one that uses a microwave network acquired from Liberty
Cable in New York in March 1996. The fiber-based customers are served by
facilities of MFS. Telephone service in New York is provisioned on the
fiber-based network and through the resale of the NYNEX network.
 
    RCN's Boston system operates primarily on a fiber-based network obtained
from MFS and provides both telephone and cable programming over this network. In
December, RCN signed an agreement forming a joint venture with Boston Edison
under which the joint venture will use and expand upon Boston Edison's 200 mile
fiber optic network to reach a market of approximately 650,000 customers
throughout the Greater Boston area. The joint venture will offer bundled
telecommunications services.
 
    RCN New York and the RCN Joint Venture with Boston Edison were granted Open
Video Systems certification from the Federal Communications Commission ("FCC")
in February 1997. This certification allows RCN to deliver video services in New
York City and Boston based on the Telecommunications Act of 1996. Prior to this
certification, RCN offered video services using MFS' network. RCN's telephone
service is regulated by the States of New York and Massachusetts and the FCC. In
New York, RCN is certified to provide competitive local exchange services and to
resell long distance services. In Massachusetts, RCN is registered to offer
local exchange carrier services and to resell long distance. RCN also has
authority from the FCC to offer international service.
 
    RCN is a competitor to the incumbent telephone and cable television
companies, primarily NYNEX, Time Warner Cable and Cablevision Systems.
 
    C-TEC INTERNATIONAL.  In January 1995, C-TEC purchased a 40% equity position
in Megacable, S.A. de C.V., Mexico's second largest cable television operator,
currently serving 174,000 subscribers in 12 cities.
 
    REGULATION.  The Federal Telecommunications Act of 1996 (the "1996 Act")
established a framework for deregulation of the communications industry. The
1996 Act should stimulate growth and competition in virtually every component of
the communications industry. The FCC and state regulators must work out the
specific implementation process. Companies are permitted to combine historically
separate lines of business into one, and provide combined services in markets of
their own choice. In addition, there will be relief from the earnings
restrictions and price controls that have governed the local telephone business
for many years and were imposed on the cable industry in 1992 by the Federal
Cable Television Consumer Protection and Competition Act of 1992 (the "1992
Act"). The rate regulation provisions of the 1992 Act have not had a materially
adverse effect on C-TEC's financial condition and results of operations. With
the passage of the 1996 Act, all cable systems rates are deregulated as
effective competition enters the franchise area, or by March 31, 1999, whichever
comes sooner. C-TEC anticipates that certain provisions of the 1992 Act that do
not relate to rate regulation, such as the provisions relating to retransmission
consent and customer service standards, will reduce future operating margins.
 
    C-TEC RESTRUCTURING.  C-TEC has received a favorable private letter ruling
from the IRS on the tax-free nature of its plan to split C-TEC into three public
companies. On July 9, 1997, C-TEC filed with the
 
                                      B-11
<PAGE>
Commission a Form 10 registration statement for each of RCN Corporation, Inc.
and Cable Michigan, Inc. Applications have been filed to allow the trading of
the common stock of each company on NASDAQ. If these external approvals are
received and various internal restructuring steps are taken, C-TEC presently
expects that the restructuring will be completed and public trading of the stock
of the three companies will occur on or about October 1, 1997. A "when-issued"
trading market may develop prior to that time.
 
    In connection with the distributions, C-TEC will change its name to
"Commonwealth Telephone Enterprises, Inc." and will own the following
businesses: Commonwealth Telephone Company (the rural local exchange carrier
business); Commonwealth Communications (the communications engineering
business); the Pennsylvania competitive local exchange carrier business; and
long distance operations in certain areas of Pennsylvania. RCN Corporation, Inc.
("RCN") will own the following businesses: its competitive telecommunications
services operations in New York City and Boston; its cable television operations
in New York, New Jersey and Pennsylvania; its 40% interest in Megacable S.A. de
C.V., Mexico's second largest cable operator; and its long distance operations
(other than the operations in certain areas of Pennsylvania). Cable Michigan,
Inc. will own and operate cable television systems in the State of Michigan and
will own a 62% interest in Mercom, Inc., a publicly held Michigan cable
television operator. A KDG subsidiary, Kiewit Telecom Holdings Inc., formerly
named RCN Corporation, will own approximately 48.5% of the common stock of each
of the three companies.
 
    The board of directors of C-TEC concluded that the distributions are in the
best interests of the shareholders because the distributions will, among other
things, (i) permit C-TEC to raise financing to fund the development of the RCN
business on more advantageous economic terms than the other alternatives
available, (ii) facilitate possible future acquisitions and joint venture
investments by RCN and Cable Michigan and possible future offerings by RCN,
(iii) allow the management of each company to focus attention and financial
resources on its respective business and permit each company to offer employees
incentives that are more directly linked to the performance of its respective
business, (iv) facilitate the ability of each company to grow in both size and
profitability, and (v) permit investors and the financial markets to better
understand and evaluate C-TEC's various businesses.
 
PKS INFORMATION SERVICES, INC.
 
    PKS Information Services, Inc. ("PKSIS"), is a full service information
technology company which provides computer operations outsourcing and systems
integration services in the U.S. and abroad. PKSIS offers custom-tailored
computer outsourcing services. PKSIS' technology expertise encompasses all
computing environments from mainframes to client/server platforms. PKSIS also
provides network and systems integration and network management services for
various computers platforms. In addition, PKSIS develops, implements and
supports applications software. PKSIS' strategy is to focus on assisting its
customers in migrating from closed computing and networking environments to
TCP/IP network platforms accessed using Web browsers.
 
    PKSIS provides its outsourcing services to clients that desire to focus
their resources on core businesses, rather than expending capital and incurring
overhead costs to operate their own computing environment. PKSIS believes that
it is able to utilize its expertise and experience, as well as operating
efficiencies, to provide its outsourcing customers with levels of service equal
to or better than those achievable by the customer itself, while at the same
time reducing the customer's cost for such services. This service is
particularly useful for those customers moving from older computing platforms to
more modern TCP/IP-based client/server networks.
 
    PKSIS' systems integration services help customers define, develop and
implement cost-effective information services. In addition, through its Systems
Integration Group, PKSIS develops, implements and supports application software
and assists customers in converting source code to modern computing platforms,
particularly TCP/IP-enabled networking.
 
                                      B-12
<PAGE>
    PKSIS, through its Suite 2000-SM- line of services, provides customers with
a multi-phased service for converting programs and application so that
date-related information is accurately processed and stored before and after the
year 2000. Through the process of converting a customer's legacy software for
year 2000 compliance, PKSIS is able to provide further insight and advice to
further stream-line and improve the customer's information systems.
 
    PKSIS has established a software engineering facility at the National
Technology Park in Limerick, Ireland, to undertake large scale development
projects, system conversions, and code restructuring and software
re-engineering. PKSIS has also established relationships with domestic and
international partners to provide such activities.
 
    PKSIS' subsidiary, LexiBridge Corporation of Shelton, Connecticut, provides
customers with a combination of workbench tools and methodology which provide a
complete strategy for converting mainframe-based application systems to
client/server architecture, while ensuring year 2000 compliance. In 1996, 91% of
PKSIS' revenue was from external customers and the remainder was from
affiliates.
 
SR91 TOLLROAD
 
    KDG has invested $12 million for a 65% interest in California Private
Transportation Company, L.P. which developed, financed, and currently operates
the 91 Express Lanes, a ten mile, four lane tollroad in Orange County,
California. The fully automated highway uses an electronic toll collection
system and variable pricing to adjust tolls to demand. Capital costs at
completion were $130 million, $110 million of which was funded with limited
recourse debt. Revenue collected over the 35-year franchise period is used for
operating expenses, debt repayment, and profit distributions. The tollroad
opened in December 1995 and achieved operating break-even in 1996. Over 80,000
customers have registered to use the tollroad and weekday volumes exceed 26,000
vehicles per weekday.
 
UNITED INFRASTRUCTURE COMPANY
 
    UIC is an equal partnership between Kiewit Infrastructure Corp., a wholly
owned subsidiary of KDG, and Bechtel Infrastructure Enterprises, Inc. UIC was
formed in 1993 to develop North American infrastructure projects. During 1996,
UIC began to focus primarily on water infrastructure projects, principally
through U.S. Water, a partnership formed with United Utilities PLC, a U.K.
company. U.S. Water has acquired the concession to operate facilities at North
Brunswick, New Jersey, and is actively pursuing similar concessions nationwide.
KDG has invested $8 million through UIC in U.S. Water. KDG has also invested $3
million through UIC in Airport Group International Inc. to develop airport
privatization projects.
 
KIEWIT MUTUAL FUND
 
    Kiewit Mutual Fund, a registered investment company, was formed in 1994.
Initially formed to manage PKS' internal investments, shares in Kiewit Mutual
Fund are now available for purchase by the general public. The Fund's investors
currently include individuals and unrelated companies, as well as
Kiewit-affiliated joint ventures, pension plans, and subsidiaries. Kiewit Mutual
Fund has six series: Money Market Portfolio, Government Money Market Portfolio,
Short-Term Government Portfolio, Intermediate-Term Bond Portfolio, Tax-Exempt
Portfolio, and the Equity Portfolio. In February 1997, the Fund adopted a
master-feeder structure. Each of the Portfolios invests in a corresponding
series of the Kiewit Investment Trust, which now manages the underlying
securities holdings. The structure will allow smaller mutual funds and
institutional investors to pool their assets with Kiewit Investment Trust,
providing lower expense ratios for all participants. The registered investment
adviser of Kiewit Investment Trust is Kiewit Investment Management Corp., a
subsidiary of KDG (60%) and the Construction Group (40%). At the end of 1996,
Kiewit Mutual Fund had net assets of $883 million.
 
                                      B-13
<PAGE>
OTHER
 
    In February 1997, KDG purchased an office building in Aurora, Colorado for
$21 million. By investing in real estate, KDG defers taxes on a portion of the
$40 million of taxable gain otherwise recognizable with respect to the Whitney
Benefits litigation settlement in 1995. KDG may make additional real estate
investments in 1997 with a view toward deferring the balance of that taxable
gain. KDG has also made investments in several development-stage companies, but
does not expect earnings from these companies in 1997.
 
GENERAL INFORMATION
 
    ENVIRONMENTAL PROTECTION.  Compliance with federal, state, and local
provisions regulating the discharge of materials into the environment, or
otherwise relating to the protection of the environment, has not and is not
expected to have a material effect upon the capital expenditures, earnings, or
competitive position of PKS and its subsidiaries.
 
    EMPLOYEES.  As of December 31, 1996, the Diversified Group employed
approximately 370 employees.
 
PROPERTIES
 
    Properties relating to KDG coal mining segment are described as part of the
general business description of the coal mining business. The properties of the
energy generation and distribution segment are described as part of the general
business description of the CalEnergy and International Energy projects. The
properties of the telecommunications segment include those of C-TEC's
Commonwealth Telephone Company (switching centers, cables and wires connecting
the telephone company to its customers, and other telephone instruments and
equipment), C-TEC Cable Systems (head-end, distribution and subscriber
equipment), and various office and storage buildings. PKS considers its
properties to be adequate for the present and foreseeable requirements of
Diversified Holdings.
 
LEGAL PROCEEDINGS
 
    GENERAL.  PKS and its subsidiaries are parties to many pending legal
proceedings. Management believes that any resulting liabilities for legal
proceedings, beyond amounts reserved, will not materially affect the financial
condition, future results of operations, or future cash flows of Diversified
Holdings.
 
    ENVIRONMENTAL PROCEEDINGS.  In a large number of proceedings, PKS, its
subsidiaries, or their predecessors are among numerous defendants who may be
"potentially responsible parties" liable for the cleanup of hazardous substances
deposited in landfills or other sites. Management believes that any resulting
liabilities for environmental legal proceedings, beyond amounts reserved, will
not materially affect the financial condition, future results of operations, or
future cash flows of Diversified Holdings.
 
                                      B-14
<PAGE>
                                   APPENDIX C
 
[Date of Proxy Statement/Joint Prospectus]
 
The Board of Directors
Peter Kiewit Sons', Inc.
100 Kiewit Plaza
Omaha, NE 68131
 
Dear Gentlemen:
 
    We have acted as financial advisor to Peter Kiewit Sons', Inc. ("PKS") in
connection with the proposed plan of reorganization (the "Reorganization") under
which: (i) the Board of Directors of PKS will require, subject to the
satisfaction of certain conditions, all holders of its Class C Construction &
Mining Group Restricted Redeemable Convertible Exchangeable Common Stock, par
value $.0625 per share("Class C Stock"), to exchange (the "Share Exchange") such
shares for shares of Common Stock, par value $.01 per share (the "Exchanged
Shares"), of PKS Holdings, Inc., a newly formed, direct, wholly owned subsidiary
of PKS which will indirectly hold all of the assets and liabilities of the
construction business of PKS; and (ii) prior to the Share Exchange, PKS will
declare a dividend of eight-tenths of one warrant (the "Warrants") to purchase
one share of Class D Diversified Group Convertible Exchangeable Common Stock,
par value $.0625 per share ("Class D Stock"), of PKS with respect to each then-
outstanding share of Class C Stock. The eight-tenths of one Warrant will attach
to the Exchanges Share which will be exchanged for such share of Class C Stock
in the Share Exchange. In that connection, you have requested us to provide you
our opinion, from a financial point of view, as to the fairness of the
Reorganization to the stockholders of PKS, including both the Class C
Stockholders and the Class D Stockholders. The Reorganization is described in
detail in the proxy statement/joint prospectus which will be sent to Class C
Stockholders and Class D Stockholders in connection with the Reorganization (the
"Proxy Statement").
 
    In arriving at our opinion, we have:
 
        (i) reviewed the financial terms of the Reorganization as described in
    the Proxy Statement and the various agreements relating to the
    Reorganization referred to in the Proxy Statement;
 
        (ii) analyzed certain historical business and financial information
    relating to Kiewit Construction Group ("KCG") and Kiewit Diversified Group
    ("KDG"), including that contained in the Proxy Statement;
 
        (iii) conducted discussions with members of management of PKS, KCG and
    KDG with respect to the historical and current businesses and the future
    prospects of KCG and KDG, the anticipated effects of the Reorganization on
    the capital structures, cash flows and operations of KCG and KDG
 
        (iv) reviewed public information as filed with the Securities and
    Exchange Commission relating to PKS, KCG and KDG, including audited
    financial statements;
 
        (v) analyzed the PKS Consent Statement and Prospectus dated November 5,
    1991; and
 
        (vi) considered prevailing economic and market conditions and conducted
    such other financial studies, analyses and investigations as we deemed
    appropriate.
 
    In connection with our review, we have assumed and relied upon, without
assuming responsibility for independent verification, the accuracy and
completeness of all information reviewed by us. We have also assumed, based upon
the information which had been provided to us and without assuming
responsibility for independent verification thereof, that no material
undisclosed or contingent liability existed with respect to PKS, KCG, or KDG.
 
    In addition, we have not made an independent evaluation or appraisal of the
assets of KCG or KDG, nor have we been furnished with any such appraisals.
Further, our opinion is based on economic, market and other conditions existing
on the date of this opinion.
<PAGE>
    Gleacher NatWest does not make a market in any of the securities of PKS.
This opinion does not represent our opinion as to the value of the securities of
KCG or KDG following the consummation of the Reorganization, or as to the prices
of which such securities may trade, when issued in connection with the
Reorganization or at any other time.
 
    We have assumed that the Reorganization will have the tax consequences as
described in the Proxy Statement.
 
    Certain Gleacher NatWest professionals own an aggregate of 30,000 shares of
Class D Stock.
 
    We are acting as financial advisor to PKS and will receive a fee for our
services.
 
    Based upon and subject to the foregoing, it is our opinion that as of the
date hereof, the Reorganization is fair to both Class C Stockholders and Class D
Stockholders from a financial point of view. Our conclusions are based solely on
information available to us on the date of this letter.
 
                                          Very truly yours,
 
                                          GLEACHER NATWEST INC.
                                          By:
              ------------------------------------------------------------------
                                          James Goodwin
                                          Managing Director
 
                                      C-2
<PAGE>
                                   APPENDIX D
                                    FORM OF
                  SECOND RESTATED CERTIFICATE OF INCORPORATION
                                       OF
                            PETER KIEWIT SONS', INC.
 
                            Pursuant to Section 245
                    of the Delaware General Corporation Law
 
    Peter Kiewit Sons', Inc., a corporation organized and existing under the
laws of the State of Delaware (the "Corporation"), hereby certifies as follows:
 
        1. The name of the Corporation is Peter Kiewit Sons', Inc. which is the
    name under which the Corporation was originally incorporated.
 
        2. The original Certificate of Incorporation of the Corporation was
    filed in the office of the Secretary of State of the State of Delaware on
    July 1, 1941 and the Restated Certificate of Incorporation of the
    Corporation was filed in such office on January 5, 1992.
 
        3. This Second Restated Certificate of Incorporation, which was duly
    adopted pursuant to Sections 242 and 245 of the Delaware General Corporation
    Law, restates and integrates and further amends the provisions of the
    Restated Certificate of Incorporation of the Corporation.
 
        4. The text of the Restated Certificate of Incorporation as heretofore
    amended or supplemented is hereby restated and further amended to read in
    its entirety as follows:
 
                  SECOND RESTATED CERTIFICATE OF INCORPORATION
                                       OF
                           DIVERSIFIED HOLDINGS, INC.
 
                                   ARTICLE I
                                      NAME
 
    The name of the Corporation (the "Corporation") is: Diversified Holdings,
Inc.
 
                                   ARTICLE II
                     REGISTERED OFFICE AND REGISTERED AGENT
 
    The address of the registered office of the Corporation in the State of
Delaware is 1209 Orange Street in the City of Wilmington, County of New Castle.
The name of its registered agent at such address is The Corporation Trust
Company.
 
                                  ARTICLE III
                                    PURPOSES
 
    The nature of the business or purposes to be conducted or promoted by the
Corporation is to engage in any lawful act or activity for which corporations
may be organized under the General Corporation Law of the State of Delaware (the
"DGCL").
<PAGE>
                                   ARTICLE IV
                                     STOCK
 
    (A) Authorized Capital Stock.
 
    The total number of shares of capital stock which the Corporation shall have
the authority to issue is 510,000,000 shares, consisting of 500,000,000 shares
of common stock, par value $.01 per share (the "Common Stock"), and 10,000,000
shares of preferred stock, par value $.01 per share ("Preferred Stock").
 
    Upon the filing of this Second Restated Certificate of Incorporation with
the office of the Secretary of the State of Delaware (the "Effective Time"),
each share of the Corporation's Class D Diversified Group Convertible
Exchangeable Common Stock, par value of $.0625 per share, that is issued and
outstanding, reserved for issuance or held in the Corporation's treasury at the
Effective Time, shall be automatically redesignated and reclassified, without
any action on the part of the respective holders thereof, as Common Stock.
 
    (B) Common Stock.
 
    (i) Dividends. After dividends have been declared and set aside on any
Preferred Stock having a preference over the Common Stock with respect to the
payment of such dividends, the holders of Common Stock shall be entitled to
receive, when and as declared, out of assets and funds legally available
therefor, cash or non-cash dividends payable as and when the Board of Directors
in its sole business judgment so declares. Any such dividend shall be payable
ratably to all record holders of Common Stock as of the record date fixed by the
Board of Directors in accordance with the By-laws of the Corporation for the
payment thereof.
 
    (ii) Liquidation Rights. In the event of any voluntary or involuntary
liquidation, dissolution or winding up of the Corporation ("Liquidation"), the
holders of Common Stock then outstanding shall be entitled to be paid ratably
out of the assets and funds of the Corporation available for distribution to its
stockholders, after and subject to the payment in full of all amounts required
to be distributed to the holders of any Preferred Stock upon Liquidation, an
amount equal to their share (including any declared but unpaid dividends on the
Common Stock, subject to proportionate adjustment in the event of any stock
dividend, stock split, stock distribution or combination with respect to such
shares) of such assets and funds.
 
    (iii) Voting.
 
    (a) Except as required by law, or as otherwise provided herein or in any
amendment hereof, the entire voting power of the Corporation shall be vested in
the holders of Common Stock voting together as a single class.
 
    (b) Each holder of Common Stock entitled to vote shall at every meeting of
the stockholders of the Corporation be entitled to one vote for each share of
Common Stock registered in his or her name on the record of stockholders.
 
    (C) Preferred Stock.
 
    The Preferred Stock may be issued from time to time as herein provided in
one or more series. The designations, relative rights, preferences and
limitations of the Preferred Stock, and particularly of the shares of each
series thereof, may, to the extent permitted by law, be similar to or differ
from those of any other series. The Board of Directors is hereby expressly
granted authority, subject to the provisions of this Article IV, to fix, from
time to time before issuance thereof, the number of shares in each series and
all designations, relative rights, preferences and limitations of the shares in
each such series, including, but without limiting the generality of the
foregoing, the following:
 
        (i) the designation of the series and the number of shares to constitute
    each series;
 
                                      D-2
<PAGE>
        (ii) the dividend rate on the shares of each series, conditions on which
    and times at which dividends are payable, whether dividends shall be
    cumulative, and the preference or relation (if any) with respect to such
    dividends (including preferences over dividends on the Common Stock or any
    other class or classes);
 
        (iii) whether the series will be redeemable (at the option of the
    Corporation or the holders of such shares or both, or upon the happening of
    a specified event) and, if so, the redemption prices and the conditions and
    times upon which redemption may take place and whether for cash, property or
    rights, including securities of the Corporation or another corporation;
 
        (iv) the terms and amount of any sinking, retirement or purchase fund;
 
        (v) the conversion or exchange rights (at the option of the Corporation
    or the holders of such shares or both, or upon the happening of a specified
    event), if any, including the conversion or exchange price and other terms
    of conversion or exchange;
 
        (vi) the voting rights, if any (other than any voting rights that the
    Preferred Stock may have as a matter of law);
 
        (vii) any restrictions on the issue or reissue or sale of additional
    Preferred Stock; (viii) the rights of the holders upon voluntary or
    involuntary liquidation, dissolution or winding up of the affairs of the
    Corporation (including preferences over the Common Stock or any other class
    or classes or series of stock); and
 
        (ix) such other special rights and privileges, if any, for the benefit
    of the holders of Preferred Stock, as shall not be inconsistent with
    provisions of this Second Restated Certificate of Incorporation.
 
    All shares of Preferred Stock of the same series shall be identical in all
respects, except that shares of any one series issued at different times may
differ as to dates, if any, from which dividends thereon may accumulate. All
shares of Preferred Stock of all series shall be of equal rank and shall be
identical in all respects except that any series may differ from any other
series with respect to any one or more of the designations, relative rights,
preferences and limitations described or referred to in subparagraphs (i) to
(ix) inclusive above.
 
                                   ARTICLE V
                                   DIRECTORS
 
    (A) The Board of Directors shall consist of no fewer than six persons and no
more than fifteen persons, and such number shall be fixed by, or in the manner
provided in, the By-laws of the Corporation.
 
    (B) Upon the Effective Time, the Board of Directors shall be divided into
three classes to be designated as Class I, Class II and Class III. The Board of
Directors, by resolution, shall designate the class in which each of the
directors then in office shall serve upon such classification. The terms of
office of the classes of directors so designated by the Board of Directors shall
expire at the times of the annual meetings of the stockholders as follows: Class
I on the first annual meeting of stockholders following the Effective Time,
Class II on the second annual meeting following the Effective Time and Class III
on the third annual meeting following the Effective Time, or thereafter in each
case when their respective successors are elected and qualified. At each
subsequent annual election, the directors chosen to succeed those whose terms
are expiring shall be identified as being of the same class as the directors
whom they succeed, and shall be elected for a term expiring at the time of the
third succeeding annual meeting of stockholders, or thereafter in each case when
their respective successors are elected and qualified. The number of
directorships shall be apportioned among the classes so as to maintain the
classes as nearly equal in number as possible.
 
    (C) A director may be removed from office only for cause and only by vote of
at least a majority of the outstanding stock entitled to vote in an election of
directors.
 
                                      D-3
<PAGE>
    (D) Any vacancy on the Board of Directors, however resulting, may be filled
by a majority of the directors then in office, even if less than a quorum, or by
a sole remaining director. Any director elected to fill a vacancy shall hold
office for a term that shall coincide with the term of the class to which such
director shall have been elected.
 
                                   ARTICLE VI
               DUTY OF THE CORPORATION TO REPURCHASE COMMON STOCK
 
    (A) Subject to the limitations set forth below in this Article VI, and only
until such time as the Common Stock has become Publicly Traded, holders of
Common Stock may at any time on or prior to the fifteenth day of any calendar
month offer to sell part or all of their shares of Common Stock to the
Corporation by delivering the certificate or certificates for such stock with a
written notice offering such stock to the Corporation. Any such offer shall be
accepted by the Corporation, and payment shall be made for such stock within 60
days after receipt of such certificates and such written notice by the
corporation, without interest.
 
    (B) Suspension of Repurchase Duties.
 
    If the Board of Directors determines that the Formula Value at the end of
the fiscal year during which such determination is made is likely to be less
than (i) the Formula Value at the end of the prior fiscal year less (ii) the
aggregate amount of dividends declared on the Common Stock since the end of the
prior fiscal year, the Board may suspend the Corporation's duty to repurchase
shares of Common Stock in accordance with this Article VI. Any such suspension
shall not extend for a period longer than 365 days from the date of the Board's
declaration of suspension. During any such suspension period, the Corporation
shall not repurchase any shares of Common Stock tendered for repurchase pursuant
to subparagraph (A) of this Article VI.
 
    (C) Limitations on Cash Repurchase Duties.
 
    (i) For purposes of this paragraph (C), the "10% Threshold" means a number
of shares of Common Stock equal to 10% of the aggregate number of such shares
outstanding as of the end of the fiscal year ending immediately prior to the
date of determination.
 
    (ii) If, after taking into account the number of shares of Common Stock
tendered for repurchase by the Corporation during the first 15 days of any
calendar month (the "Tendered Shares"), the aggregate number of shares of such
stock that have been tendered for repurchase during the fiscal year during which
such month falls equals or exceeds the 10% Threshold, the Board of Directors may
declare that cash payments for the repurchase of Common Stock are not in the
best interests of the Corporation. The Board of Directors shall make any such
declaration prior to the last day of the relevant calendar month and shall
promptly provide to the holders of Tendered Shares with respect to such calendar
month a notice specifying:
 
        (a) the percentage (the "Specified Percentage") of the Tendered Shares
    that will be purchased for cash (which may, in the discretion of the Board
    of Directors, be a percentage calculated to limit the aggregate number of
    shares purchased for cash during the relevant fiscal year to the 10%
    Threshold or a greater percentage); and
 
        (b) the terms (including interest rate and prepayment rights, if any) of
    promissory notes maturing on a date to be determined by the board of
    Directors, but not later than ten years after the date upon which the holder
    of such note tendered the Tendered Shares, which will be issued by the
    Corporation in payment for any Tendered Shares that are not purchased for
    cash and the tender of which is not withdrawn pursuant to subparagraph (iii)
    below.
 
    (iii) Upon receipt of the notice required by subparagraph (ii), each holder
of Tendered Shares may elect to withdraw such holder's tender of a number of
shares of Common Stock not exceeding the number
 
                                      D-4
<PAGE>
of shares in excess of the number determined by multiplying the Specified
Percentage by the number of shares tendered by such holder. Notice of any such
election shall be provided to the Corporation not later than ten days after the
date upon which such holder receives the notice provided by the Corporation
pursuant to subparagraph (ii) above.
 
    (iv) After the date of any declaration by the Board of Directors pursuant to
subparagraph (ii), the Corporation shall continue to be obligated to purchase
shares of Common Stock subsequently tendered for repurchase during the relevant
fiscal year, but payment for any such shares shall be made in the form of a
promissory note maturing on a date to be determined by the Board of Directors,
but not later than ten years after the date upon which such shares are tendered.
The terms of any such notes shall be determined by the Board of Directors at the
time at which any of the Common Stock is tendered; provided, however, that the
Corporation shall provide notice to any tendering stockholder of the terms of
such note not later than ten days after the date of tender, and such stockholder
shall be entitled to withdraw the tender of any or all of such shares by
providing written notice of such withdrawal to the Corporation not later than
ten days after the date upon which such holder receives the notice of such terms
from the Corporation.
 
    (D) Common Stock Per Share Price.
 
    Subject to the limitations set forth in this Article VI, the Corporation
shall purchase any share of Common Stock pursuant to this Article VI for a price
equal to the Common Stock Per Share Price.
 
    (E) Definitions for purposes of Article VI.
 
    (i) "Common Stock Per Share Price" with respect to any share of Class D
Stock, means the amount determined by dividing:
 
        (a) the sum of (i) the Formula Value PLUS (ii) the portion of the face
    amount of any outstanding Convertible Debentures convertible into Common
    Stock, determined as of the fiscal year end immediately preceding the date
    of determination (the "prior year end"); by
 
        (b) the sum of (i) the total number of issued and outstanding shares of
    Common Stock, PLUS (ii) the total number of shares reserved for the
    conversion of outstanding Convertible Debentures convertible into Common
    Stock, in each case determined as of the prior year end; and
 
deducting from the quotient (rounded to the nearest $0.05) the amount of any
dividends per share declared on Common Stock subsequent to the prior year end.
 
    (ii) "Convertible Debenture" means any debenture or other instrument
evidencing indebtedness of the Corporation convertible at any time into shares
of Common Stock.
 
    (iii) "Formula Value" means:
 
        (a) if such Formula Value is being determined as of the end of the
    fiscal year ending December [  ], 1997, the total stockholders' equity of
    the Corporation and its consolidated Subsidiaries, determined by independent
    certified public accountants in conformity with generally accepted
    accounting principles applied on a consistent basis as of [the Exchange
    Date], 1997 after giving effect to the exchange on that date of the shares
    of the Corporation's then outstanding Class C Construction & Mining Group
    Restricted Redeemable Convertible Exchangeable Common Stock, par value
    $.0625 per share, for shares of common stock of PKS Holdings, Inc.; or
 
        (b) if such Formula Value is being determined as of the end of any
    fiscal year ending after December 31, 1997, the total stockholders' equity
    as shown on the consolidated balance sheet contained in the Consolidated
    Financial Statements of the Corporation and consolidated Subsidiaries,
    prepared in conformity with generally accepted accounting principles applied
    on a consistent basis for the Corporation and its consolidated Subsidiaries
    as of the fiscal year end immediately preceding the date of determination
    (the "prior year end") and audited and certified by an independent firm of
    certified public accountants selected and engaged by the Board of Directors;
    MINUS
 
                                      D-5
<PAGE>
        (c) the sum of (x) such total stockholders' equity attributable to any
    issued and outstanding Preferred Stock, plus (y) the amount of any accrued,
    accumulated and undeclared dividends thereon, all as of the date of
    determination.
 
    (iv) "Publicly Traded" means as to the Common Stock, that (x) the stock has
been listed on a United States national or regional stock exchange, (y) the
stock is quoted on the Nasdaq National Market or the Nasdaq SmallCap Market or
(z) the Board of Directors determines that the stock has otherwise become
publicly traded. In making such a determination, the Board may consider the
frequency and means of trading in the stock.
 
    (v) "Subsidiary" means a corporation, partnership or other entity with
respect to which the Corporation holds, directly or indirectly, at least a
majority of the issued and outstanding capital stock or other equity interests,
measured in terms of total dollar value if such entity has outstanding more than
one class of capital stock or other equity interests.
 
                                  ARTICLE VII
                               STOCKHOLDERS' VOTE
 
    Any action required or permitted to be taken at any annual or special
meeting of stockholders may be taken only upon the vote of the stockholders at
an annual or special meeting duly noticed and called, as provided in the By-laws
of the Corporation, and may not be taken by a written consent of the
stockholders.
 
                                  ARTICLE VIII
                                INDEMNIFICATION
 
    The Corporation shall indemnify each person who is or was a director,
officer or employee of the Corporation (including the heirs, executors,
administrators or estate of such person) or is or was serving at the request of
the Corporation as a director, officer or employee of another corporation,
partnership, joint venture, trust or other enterprise, to the fullest extent
permitted under Subsections 145(a), (b), and (c) of the DGCL or any successor
statute.
 
    The indemnification provided by this Article VIII shall not be deemed
exclusive of any other rights to which any of those seeking indemnification or
advancement of expenses may be entitled under any by-law, agreement, vote of
stockholders or disinterested directors or otherwise, both as to action in his
official capacity and as to action in another capacity while holding such
office, and shall continue as to a person who has ceased to be a director,
officer, employee or agent and shall inure to the benefit of the heirs,
executors and administrators of such a person.
 
                                   ARTICLE IX
                            LIMITATION OF LIABILITY
 
    A director of this Corporation shall not be personally liable to the
Corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director, except for liability (i) for any breach of the director's
duty of loyalty to the Corporation or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law, (iii) under Section 174 of the DGCL, or (iv) for any
transaction from which the director derived an improper personal benefit. If the
DGCL is amended after approval by the stockholders of this Article IX to
authorize corporate action further eliminating or limiting the personal
liability of directors, then the liability of a director of the Corporation
shall be eliminated or limited to the fullest extent permitted by the DGCL as so
amended.
 
                                      D-6
<PAGE>
    Any repeal or modification of the foregoing paragraph by the stockholders of
the Corporation shall not adversely affect any right or protection of a director
of the Corporation existing at the time of such repeal or modification.
 
                                   ARTICLE X
                                SPECIAL MEETINGS
 
    Special meetings of the stockholders of the Corporation for any purpose or
purposes may be called at any time by the Board of Directors, the President, the
Chief Executive Officer or the Chairman of the Board of Directors. Special
meetings of the stockholders of the Corporation may not be called by any other
person or persons.
 
                                   ARTICLE XI
                          RATIFICATION BY STOCKHOLDERS
 
    Any contract, transaction or act of the Corporation or of the directors,
which shall be ratified by a majority of a quorum of the stockholders then
entitled to vote at any annual meeting or at any special meeting called for such
purpose, shall, so far as permitted by law and by this Certificate of
Incorporation, be as valid and as binding as though ratified by every
stockholder entitled to vote at such meeting.
 
                                  ARTICLE XII
                           AMENDMENTS OF CERTIFICATE
 
    The Corporation reserves the right to amend, alter, change or repeal any
provision contained in this Second Restated Certificate of Incorporation or in
any amendment hereto by the affirmative vote of a majority of the outstanding
stock entitled to vote thereon; provided, however, that the provisions of this
Second Restated Certificate of Incorporation requiring for action by the
stockholders a vote of at least sixty-six and two-thirds percent (66 2/3%) shall
not be amended except by such vote; and provided further, that (A) the formulae
for determining Formula Value or Common Stock Per Share Price shall not be
amended except by the affirmative vote of at least eighty percent (80%) of the
outstanding stock entitled to vote thereon and (B) this Article XII shall not be
amended except by the affirmative vote of at least sixty-six and two-thirds
percent (66 2/3%) of the outstanding stock entitled to vote thereon.
 
                                  ARTICLE XIII
                                   CREDITORS
 
    Whenever a compromise or arrangement is proposed between this Corporation
and its creditors or any class of them and/or between this Corporation and its
stockholders or any class of them, any court of equitable jurisdiction within
the State of Delaware may, on the application in a summary way of this
Corporation or of any creditor or stockholder thereof on the application of any
receiver or receivers appointed for this Corporation under the provisions of
section 291 of Title 8 of the DGCL or on the application of trustees in
dissolution or of any receiver or receivers appointed for the Corporation under
the provisions of Section 279 of Title 8 of the DGCL, order a meeting of the
creditors or class of creditors, and/or of the stockholders or class of
stockholders of the Corporation, as the case may be, to be summoned in such
manner as the said court directs. If a majority in number representing
three-fourths in value of the creditors or class of creditors, and/or of the
stockholders or class of stockholders of this Corporation, as the case may be,
agree to any compromise or arrangement and to any reorganization of this
Corporation as consequence of such compromise or arrangement, the said
compromise or arrangement and the said reorganization shall, if sanctioned by
the court to which the said application has been made, be binding on
 
                                      D-7
<PAGE>
all the creditors or class of creditors, and/or on all the stockholders or class
of stockholders, of this Corporation, as the case may be, and also on this
Corporation.
 
                                  ARTICLE XIV
                                    BY-LAWS
 
    In furtherance and not in limitation of the powers conferred by statute, the
Board of Directors is expressly authorized to adopt, repeal, alter, amend or
rescind the By-laws of the Corporation. In addition, the By-laws of the
Corporation may be adopted, repealed, altered, amended or rescinded by the
affirmative vote of at least sixty-six and two-thirds percent (66 2/3%) of the
outstanding stock entitled to vote thereon.
 
    IN WITNESS WHEREOF, the Corporation has caused this Second Restated
Certificate of Incorporation to be signed by                  , its President,
this   day of         , 1997.
 
<TABLE>
<S>                             <C>  <C>
                                By:  -----------------------------------------
                                                     PRESIDENT
</TABLE>
 
                                      D-8
<PAGE>
                                   APPENDIX E
 
                   FORM OF RESTATED CERTIFICATE OF INCORPORATION
 
    PKS Holdings, Inc., a corporation organized and existing under the laws of
the State of Delaware, hereby certifies as follows:
 
    1. The name of the Corporation is PKS Holdings, Inc. The original
Certificate of Incorporation of PKS Holdings, Inc. was filed with the Secretary
of State of Delaware on August       , 1997.
 
    2. Pursuant to Sections 242 and 245 of the General Corporation Law of the
State of Delaware, this Restated Certificate of Incorporation has been duly
authorized and adopted and restates and amends the provisions of the Certificate
of Incorporation of this Corporation.
 
    3. The text of the Certificate of Incorporation is hereby restated and
amended to read in its entirety as follows:
 
                                 ARTICLE FIRST
 
                                      NAME
 
    The name of the Corporation (which is hereinafter referred to as the
"Corporation"), is:
 
                               PKS HOLDINGS, INC.
 
                                 ARTICLE SECOND
 
                      DELAWARE OFFICE AND REGISTERED AGENT
 
    The registered office of the Corporation in the State of Delaware is to be
located at 1209 Orange Street, in the City of Wilmington, County of New Castle.
The name of its registered agent therein is The Corporation Trust Company, and
the address of said registered agent is 1209 Orange Street in said City, County
and State.
 
                                 ARTICLE THIRD
 
                                    PURPOSES
 
    The nature of the business or purposes to be conducted or promoted is:
 
    To engage in any lawful act or activity for which corporations may be
organized under the General Corporation Law of Delaware.
 
                                 ARTICLE FOURTH
 
                                 CAPITAL STOCK
 
    The total number of shares of all classes of stock which the Corporation
shall have authority to issue is 125,250,000 shares; of which 250,000 shares
shall be Preferred Stock, with no par value per share and of which 125,000,000
shares shall be Common Stock, with a par value of $0.01 per share (the "Common
Stock").
 
    A description of the different classes of stock and a statement of the
designations, powers, preferences, rights, qualifications, limitations and
restrictions of each of said classes of stock are as follows:
 
I. PREFERRED STOCK
 
    Subject to the limitations prescribed by Delaware law and this Certificate
of Incorporation, the Board of Directors of the Corporation is authorized to
issue the Preferred Stock from time to time in one or more series, each of such
series to have such powers, designations, preferences and relative,
participating, optional or other rights, and such qualifications, limitations or
restrictions thereof, as shall be determined by the Board of Directors in a
resolution or resolutions providing for the issuance of such Preferred Stock;
<PAGE>
provided, however, that no series of the Preferred Stock shall have any voting
rights or be convertible into shares of stock having any voting rights.
 
II. COMMON STOCK
 
    (A) Dividends. After any dividend has been declared and set aside for
payment or paid on any series of Preferred Stock having a preference over the
Common Stock with respect to the payment of dividends, the holders of the Common
Stock shall be entitled to receive out of the funds legally available therefor,
when, as and if declared by the Board of Directors. The payment of dividends on
the Common Stock shall be at the sole discretion of the Board of Directors.
 
    (B) Liquidation. Upon the liquidation, dissolution or winding up of the
affairs of the Corporation, whether voluntary or involuntary, after there shall
have been paid or set apart for the holders of any series of Preferred Stock
having a preference over the Common Stock with respect to distributions upon
liquidation the full amount to which they are entitled, the remaining assets
available for distribution to the Corporation's stockholders shall be
distributed to the Common stockholders pro rata on the basis of the numbers of
Common shares held by such stockholders.
 
III. VOTING RIGHTS ANDCHANGES IN CAPITAL STRUCTURE
 
    (A) Voting Rights. Except as may otherwise be provided by statute, the
holders of the Common Stock shall exclusively possess voting power for the
election of directors and for other purposes, the holders of record of each
share being entitled to one vote for each share, and the holders of the
Preferred Stock shall have no voting rights nor shall they be entitled to notice
of meetings of stockholders.
 
    (B) Changes in Capital Structure. The Corporation reserves the right to
create new classes of stock, to eliminate classes of stock, to increase or
decrease the amount of authorized stock of any class or classes, and to
otherwise change the powers, designations, preferences and relative,
participating, optional or other rights, and the qualifications, limitations or
restrictions of any class or classes of stock by the affirmative vote of the
holders of four-fifths of the Common Stock issued and outstanding
 
                                 ARTICLE FIFTH
 
                             DIRECTORS AND OFFICERS
 
    (A)(1) Number, Quorum, Required Votes. The number of directors of the
Corporation which shall constitute the whole Board of Directors shall at all
times be not less than ten (10) nor more than fifteen (15). Subject to such
minimum and maximum limitations, the number of directors shall be fixed by, or
in the manner provided in, the by-laws. A majority of the whole Board of
Directors shall constitute a quorum for the transaction of business. Unless this
Certificate of Incorporation shall specifically require a vote of a greater
number, the affirmative vote of a majority of the whole Board of Directors shall
be required to constitute the act of the Board of Directors.
 
    (2) Qualifications of Directors.
 
    (a) At least three-fourths of the directors must be inside directors, as
defined in this subparagraph (A)(2).
 
    (b) An "inside director" is a director who is either a current inside
director or a former inside director, as each of such terms is defined in this
subparagraph (A)(2).
 
    (c) A "current inside director" is a director who (i) is a current Common
stockholder of the Corporation; (ii) is currently an officer of either (A) the
Corporation or (B) a Subsidiary which is engaged primarily in the construction,
mining or materials businesses; and (iii) was continuously employed by the
Corporation, its predecessor, former parent corporation or such a Subsidiary for
at least eight (8) years before becoming a director.
 
                                      E-2
<PAGE>
    (d) If a current inside director ceases to be a current inside director,
such director may continue to serve as a director so long as there is a
sufficient number of other inside directors so that the three-fourths ratio
required by subparagraph (A)(2)(a) is satisfied. However, if as a result of the
change in such director's status such inside director ratio falls below
three-fourths, then such director shall automatically be deemed to have resigned
as and shall cease to be a director. The remaining directors shall thereupon act
promptly to fill the vacancy created by such resignation. Such a vacancy may be
filled with a former inside director, as defined in subparagraph (A)(2)(e)
below. If the director whose resignation created such vacancy qualifies as a
former inside director pursuant to subparagraph (A)(2)(e), such director may be
appointed to fill such vacancy.
 
    (e) A "former inside director" is a person who: (i) was at one time a
current inside director; (ii) served as an inside director for at least eight
(8) years; and (iii) is declared to be a former inside director by a majority
vote of the directors holding office at the time of such declaration.
 
    (3) Nomination Procedures. The incumbent directors shall nominate a slate of
directors for election at each annual meeting of the stockholders of the
Corporation. In nominating such election slates, the directors shall give due
consideration to selecting nominees from each of the principal business segments
represented by the activities of the Corporation and its Subsidiaries.
 
    (B) Cumulative Voting. At any election for directors every holder of Common
Stock entitled to vote at such election shall have the right to vote, in person
or by proxy, the number of shares owned by him for as many persons as there are
directors to be elected and for whose election he has a right to vote, or to
cumulate his votes by giving one candidate as many votes as the number of such
directors multiplied by the number of his shares shall equal, or by distributing
such votes on the same principle among any number of such candidates.
 
    (C) Officers. The Corporation shall have such officers as the by-laws may
provide, except, however, that the Corporation shall have an officer or officers
who shall be empowered to sign instruments and stock certificates of the
Corporation and shall have an officer who shall have the duty to record the
proceedings of stockholders' meetings and meetings of the Board of Directors.
Officers shall be chosen in such manner and shall hold their offices for such
terms as the by-laws may prescribe or as shall be determined by the Board of
Directors.
 
                                 ARTICLE SIXTH
 
                      POWERS OF THE CORPORATION AND OF THE
 
                           DIRECTORS AND STOCKHOLDERS
 
    The following provisions are inserted for the management of the business and
for the conduct of the affairs of the Corporation, and in further creation,
definition, limitation and regulation of the powers of the Corporation, its
directors and stockholders:
 
    (A) Indemnification.
 
    (1) Fullest Extent Permitted by Law. The Corporation shall indemnify each
person who is or was a director, officer or Employee of the Corporation
(including the heirs, executors, administrators or estate of such person) or is
or was serving at the request of the Corporation as a director, officer or
employee of another corporation, partnership, joint venture, trust or other
enterprise to the fullest extent permitted under subsections 145(a), (b), (c)
and (e) of the Delaware General Corporation Law or any successor statute.
 
    (2) Non-Exclusivity of Rights. The indemnification provided by this
paragraph (A) of ARTICLE SIXTH shall not be deemed exclusive of any other rights
to which any of those seeking indemnification or advancement of expenses may be
entitled under any by-law, agreement, vote of shareholders or disinterested
directors or otherwise, both as to action in his official capacity and as to
action in another capacity
 
                                      E-3
<PAGE>
while holding such office, and shall continue as to a person who has ceased to
be a director, officer, Employee or agent and shall inure to the benefit of the
heirs, executors and administrators of such a person.
 
    (3) Repeal or Modification. Any repeal or modification of paragraph (A) of
this ARTICLE SIXTH by the stockholders of the Corporation shall not adversely
affect any right or protection of a director, officer or Employee of the
Corporation existing at the time of such repeal or modification.
 
    (B) Powers of Board. In furtherance and not in limitation of the powers
conferred by statute, the Board of Directors is expressly authorized:
 
    (1) By-Laws. To make, alter and repeal the by-laws of the Corporation by
affirmative vote of two-thirds of the whole Board of Directors;
 
    (2) Mortgages, Liens, and Pledges. To authorize and cause to be executed
mortgages and liens on the real and personal property and pledges of personal
property of the Corporation without the assent or vote of the stockholders;
 
    (3) Payments. In its discretion to pay for any property or rights acquired
by the Corporation, either wholly or partly in money, stock, bonds, debentures
or other securities of the Corporation;
 
    (4) Determination of Amount Constituting Capital. To fix and determine from
time to time what part of the consideration received by the Corporation on any
issue of stock without par value shall constitute capital;
 
    (5) Bonds, Debentures, and Other Obligations. Without the assent or vote of
the stockholders, to issue bonds, debentures, or other obligations of the
Corporation from time to time, without limit as to amount, for any of the
objects or purposes of the Corporation and if desired, to secure the same or any
part thereof by mortgage, pledge, deed of trust or otherwise on any part or all
of its property and to cause the Corporation to guarantee bonds, debentures,
notes, indebtedness or other obligations of persons, firms and/or other
corporations;
 
    (6) Convertible Obligations. To create and issue obligations of the
Corporation that shall confer upon the holders or owners thereof the right to
convert the same into shares of stock of the Corporation, and to fix the rate at
which such obligations may be so converted and the period or periods of time
during which any such right of conversion shall exist, and any shares of stock
issued upon the conversion of any such obligations shall be conclusively deemed
to be fully paid stock and not liable to any further call or assessment, and the
holder thereof shall not be liable for any further payment in respect thereof;
 
    (7) Performance-Based Obligations. To create and issue obligations of the
Corporation that shall confer upon the holders or owners thereof the right to
receive interests based in whole or in part upon the financial performance of
the Corporation or any part, division or subsidiary thereof, and to fix the
term, conditions for sale and repurchase, applicable performance standards,
interest rate and such other conditions, rights and restrictions for such
obligations as it shall determine;
 
    (8) Inspections by Stockholders. To determine from time to time whether and
to what extent and at what times and places and under what conditions and
regulations the accounts and books of the Corporation, or any of them, shall be
open to inspection of the stockholders; and no stockholder shall have any right
to inspect any account or book or document of the Corporation, except as
expressly conferred by the laws of the State of Delaware, unless and until
authorized so to do by resolution of the Board of Directors, or by resolution of
the Common stockholders;
 
    (9) Committees. By resolution or resolutions, passed by an affirmative vote
of two-thirds of the whole Board of Directors, to designate one or more
committees, each committee to consist of two or more of the directors of the
Corporation, which, to the extent provided in said resolution or resolutions, or
in the by-laws of the Corporation, shall, to the extent permitted by Delaware
Corporation Law, have and may
 
                                      E-4
<PAGE>
exercise the powers of the Board of Directors in the management of the business
and affairs of the Corporation, except the powers to amend the by-laws, to
declare dividends and to act contrary to any action previously undertaken by the
Board of Directors, and may have power to authorize the seal of the Corporation
to be affixed to all papers which may require it, said committee or committees
to have such name or names as may be stated in the by-laws of the Corporation or
as may be determined from time to time by resolution adopted by the Board of
Directors; and
 
    (10) Additional Powers. The Corporation may in its by-laws confer powers
upon its Board of Directors in addition to the foregoing and in addition to the
powers and authorities expressly conferred upon it by statute.
 
    (C) Limitations on Powers of Board. In limitation of those powers conferred
by statute regarding the matters described in this paragraph (C), the Board of
Directors is authorized to act as follows:
 
    (1) Substantial Acquisitions. To acquire for the Corporation any property,
rights or privileges at such price and for such consideration and generally upon
such terms and conditions as it thinks fit; provided, however, an affirmative
vote of two-thirds of the whole Board of Directors shall be required for the
Corporation to make a substantial acquisition not in the primary, ordinary and
regular course of its business activities; and provided further that for the
purposes of this subparagraph (1) "substantial acquisition" shall mean an
acquisition (or a series of acquisitions which, in light of the period of time
over which they are effected and the intentions of the Board of Directors in
making them, should be characterized for the purposes of this subparagraph (1)
as a single acquisition) with a price (excluding the amount of any assumed
obligation and any amount paid out of the proceeds of a loan under the terms of
either of which the lender has recourse only against the asset or assets being
acquired) in excess of ten (10%) percent of the total stockholders' equity of
the Corporation, determined on a consolidated basis as of the fiscal year end
immediately preceding such acquisition;
 
    (2) Substantial Dispositions. To dispose of for the Corporation any
property, rights or privileges at such price and for such consideration and
generally upon such terms and conditions as it thinks fit; provided, however, an
affirmative vote of two-thirds of the whole Board of Directors shall be required
for the Corporation to make a substantial disposition not in the primary,
ordinary and regular course of its business activities; and provided that for
the purpose of this subparagraph (2) "substantial disposition" shall mean a
disposition (or a series of dispositions which, in light of the period of time
over which they are effected and the intentions of the Board of Directors in
making them, should be characterized for the purposes of this subparagraph (2)
as a single disposition) with a price in excess of ten (10%) percent of the
total stockholders' equity of the Corporation, determined on a consolidated
basis as of the fiscal year end immediately preceding such disposition; provided
further, however, such sale or disposition shall not constitute a sale or
disposition of all or substantially all of the Corporation's property and
assets, the approval for which is hereinafter provided;
 
    (3) Sale of All or Substantially All Assets. To sell, lease or exchange all
or substantially all of the Corporation's property and assets, including its
good will and its corporate franchises, upon such terms and conditions and for
such considerations, which may be in whole or in part shares of stock in, and/or
other securities of, any other corporation or corporations, as said Board of
Directors shall deem expedient and in the best interests of the Corporation,
only when and as authorized by the affirmative vote of the holders of
four-fifths of the Common Stock issued and outstanding;
 
    (4) Offers of Common Stock to Non-Employees. To offer to sell the Common
Stock of the Corporation to persons other than Employees of the Corporation, in
any manner, including but not limited to a "public offering" within the meaning
of the United States Securities Act of 1933, as it may be amended from time to
time, only when and as authorized by the affirmative vote of the holders of
four-fifths of the Common Stock issued and outstanding;
 
                                      E-5
<PAGE>
    (5) Change In Stock Price Formula. To change the formula for determining the
Formula Value or the Common Share Price, only when and as authorized by the
affirmative vote of the holders of four-fifths of the Common Stock issued and
outstanding;
 
    (6) Mergers and Consolidations. To merge or consolidate the Corporation with
a corporation other than a Subsidiary, only when and as authorized by the
affirmative vote of the holders of four-fifths of the Common Stock issued and
outstanding; and
 
    (7) Dissolution. To dissolve the Corporation, only when and as authorized by
the affirmative vote of the holders of four-fifths of the Common Stock issued
and outstanding.
 
    (D) Stock Ownership and Transfer Restrictions. The following restrictions on
the ownership and transfer of the Common Stock of the Corporation are hereby
imposed:
 
    (1) Ownership Restrictions. All shares of Common Stock sold by the
Corporation shall be subject to a repurchase agreement, the terms of which shall
be determined by the Board of Directors. With the prior approval of the Board of
Directors and subject to paragraph (D)(3), Employees, fiduciaries for the
benefit of the Employee's spouse and/or children, corporations one hundred
(100%) percent owned by Employees or Employees and their spouse and/or children,
and fiduciaries for the benefit of such corporations, charities and fiduciaries
for charities designated by any such persons shall be eligible to own Common
Stock of the Corporation.
 
    (2) Transfers to Charitable Organizations. The holders of the Common Stock
may transfer such stock to tax-exempt charitable organizations approved as such
by the Internal Revenue Service; provided, that any such transfer shall be
subject to a repurchase agreement which provides, in part, that said charitable
owners shall agree not to transfer, assign, pledge, hypothecate, or otherwise
dispose of such stock except in a sale to the Corporation, and said charitable
owners shall at any time upon five (5) days' written notice and demand by the
Corporation sell such stock to the Corporation. The Corporation shall be
obligated to accept any offer made by the charitable owners to sell such stock
to the Corporation. The purchase price for the Common Stock shall be the Share
Price. Payment of the purchase price shall be made by the Corporation within
sixty (60) days of its acquiring of any such stock, without interest.
 
    (3) Transfer Restrictions On Common Stock.
 
    (a) Sales to Corporation. The holders of Common Stock shall not sell,
transfer, assign, pledge, hypothecate or otherwise dispose of such stock except
in a sale to the Corporation or in a transfer to an authorized transferee
approved by the Board of Directors pursuant to subparagraph (D)(1) above or a
transfer in accordance with subparagraph (D)(2) above. Holders of Common Stock
may, at any time on or prior to the 15th day of any calendar month, offer to
sell part or all of their Common Stock to the Corporation by delivering the
certificate or certificates representing such stock to the Corporation along
with a written notice offering such stock to the Corporation. Such offer must be
accepted by the Corporation, and payment shall be made for such stock within
sixty (60) days after the receipt of such stock and such written notice by the
Corporation, without interest. The rights of redemption provided for in this
subparagraph (D)(3)(a), and each other right of redemption of Common Stock
provided for in this Certificate of Incorporation, shall be subject to the
requirement that no shares of any class shall be redeemed, either at the option
of the holder thereof or of the Corporation, unless after giving effect to such
redemption there remain outstanding at least 1,000 shares of stock of the
Corporation having full voting power.
 
    (b) Termination. Upon the termination of the employment of any Employee with
the Corporation for any reason other than death, the Employee or his authorized
transferee shall sell and deliver the Common Stock held by such Employee or his
authorized transferee to the Corporation within ten (10) days after the date of
a written notice from the Corporation to sell and deliver such stock (a
"Repurchase Notice"). The Corporation shall give such Repurchase Notice within
the period commencing on the day of termination
 
                                      E-6
<PAGE>
and ending on the 90th day after such termination. Payment for such stock shall
be made within sixty (60) days after the date of such Repurchase Notice, without
interest.
 
    (c) Death. Upon the death of any Employee, the estate, successor or personal
representative of such Employee or the authorized transferee of such Employee
shall sell and deliver the Common Stock previously held by such Employee or held
by his authorized transferee to the Corporation within ten (10) days after the
date of a written notice from the Corporation to sell and deliver such stock.
The Corporation shall give the notice to sell and deliver within the period
commencing on the day of death of such Employee and ending on the 180th day
after said death. Payment for such stock shall be made within sixty (60) days
after the date of said notice, without interest. Upon the death of an Employee
holding stock of the Corporation on the day of his death, the Employee's estate,
successor or personal representative and any authorized transferee of such
deceased Employee shall have the option to defer the purchase by the Corporation
of its Common Stock to a date or dates later than that provided for in this
subparagraph (D)(3) but prior to the January 10th next succeeding the fiscal
year during which the Employee's death occurred.
 
    (d) Ownership of Excessive Amount. Upon a determination by the Board of
Directors that the amount of Common Stock held by an Employee and/or his
authorized transferee is excessive in view of the Corporation's policy that the
level of an Employee's stock ownership should reflect certain factors, including
but not limited to (i) the relative contribution of that Employee to the
economic performance of the Corporation, (ii) the effort being put forth by such
Employee, and/or (iii) the level of responsibility of such Employee, the
Corporation shall have the option to purchase from such Employee and/or his
authorized transferee an amount of Common Stock sufficient to decrease the
amount of such stock owned by such Employee or his authorized transferee to an
amount that the Board of Directors, in its sole discretion, believes is
appropriate. In the event that the Corporation elects to exercise this option,
it shall give the Employee and/or his authorized transferee written notice to
that effect and the Employee and/or his authorized transferee shall sell and
deliver the amount of stock specified in such notice to the Corporation within
ten (10) days after the date of the notice, with payment to be made for such
stock within sixty (60) days after the date of said notice, without interest.
 
    (e) Pledges. Notwithstanding anything contained in this subparagraph (D)(3)
to the contrary, an Employee may pledge Common Stock for loans in connection
with the ownership of the Corporation's stock.
 
    (f) Authorized Transferee. For purposes of this subparagraph (D)(3), the
term "authorized transferee" shall mean any stockholder permitted to own stock
of the Corporation pursuant to paragraph (D)(1) above.
 
    (g) Failures to Meet Time Limits. No failure by the Corporation, a
stockholder, an authorized transferee, or the estate, successor, or personal
representative of a stockholder to take any action within any time period
prescribed by this subparagraph (D)(3) shall render the Common Stock of the
Corporation transferable other than in conformance with the provisions of this
subparagraph (D)(3) or preclude the Corporation from exercising its right to
purchase any such stock.
 
    (4) Stock Price. The Corporation shall purchase or sell any share of Common
Stock for a price equal to the Common Share Price. The consideration paid for
such Common Stock shall be in cash or such other form as mutually agreed upon by
the Corporation and the Common stockholder.
 
    (5) Limitations On Amount of Ownership. No more than ten (10%) percent of
the shares of the Common Stock issued and outstanding shall at any time be owned
of record, or voted, by or for the account of any one Employee as hereinbefore
described. For purposes of calculation of said ten (10%) percent limitations
Common Stock of the Corporation owned by an Employee's spouse, children,
grandchildren, parents, grandparents and spouses of such persons (collectively,
an Employee's "family members"), fiduciaries for the benefit of an Employee or
his family members, fiduciaries for charities
 
                                      E-7
<PAGE>
designated by an Employee or his family members, and any entity which an
Employee or his family members have created or control, directly or indirectly,
or in which an Employee or his family members have a beneficial or reversionary
interest, shall be counted as being owned by the Employee. All calculations
regarding the ten (10%) percent limitation (including both the numerator and
denominator of the calculations) shall be on a fully diluted basis (i.e., all
stock that in the future will be issued upon the conversion of any then-issued
and outstanding Convertible Debentures of the Corporation shall be included in
the calculations). The ten (10%) percent limitations shall be calculated as of
the 1st day of January of each year, and any stockholder who owns more Common
Stock than the ten (10%) percent limitation permits shall be so notified by the
Corporation and shall, at the stockholder's option, be permitted to hold the
excess stock until the next succeeding January 1, and on or before said January
1, the stockholder shall take the action described in subparagraph (D)(6) below
 .
 
    (6) Sales of Excess Stock. In the event that any stockholder through his own
action or the action of others becomes an owner of more than ten (10%) percent,
as defined in subparagraph (D)(5) above, of the Common Stock, he shall offer to
the Corporation, and the Corporation shall purchase within sixty (60) days of
such offer, at the price defined in subparagraph (D)(4) above, such amount of
his stock that is in excess of said ten (10%) percent limitation. In the event
that a stockholder shall fail to offer such stock to the Corporation within the
period described in subparagraph (D)(5) above, the Corporation shall, within
sixty (60) days following the end of such period, purchase such excess stock
holdings.
 
    (7) Termination of Certain Owners. Any stockholder-Employee of the
Corporation who owns two (2%) percent or more of the Common Stock issued and
outstanding shall not be terminated from employment of the Corporation except by
an affirmative vote of two-thirds of the whole Board of Directors. The Board of
Directors shall have the right to reduce said two (2%) percent requirement in
the by-laws of the Corporation to a lower percentage requirement by an
affirmative vote of two-thirds of the whole Board of Directors. For purposes of
calculation of this percentage requirement, the attribution rules specified in
paragraph (D)(5) above regarding the ten (10%) percent limitation on ownership
shall apply.
 
    (8) Suspension of Repurchase Duties. Notwithstanding anything in this
ARTICLE SIXTH to the contrary, in the event that the Board of Directors
determines that the Formula Value to be determined at the end of the fiscal year
during which such determination is made is likely to be less than (i) the
Formula Value determined at the end of the prior fiscal year less (ii) the
aggregate amount of dividends declared on the Common Stock since the end of the
prior fiscal year, the Board may suspend the Corporation's duty to repurchase
shares of Common Stock in accordance with this paragraph (D)(8). Any such
suspension shall not extend for a period longer than three hundred sixty-five
(365) days from the date of the Board's declaration of suspension. During any
such suspension period, the Corporation shall not repurchase any shares of
Common Stock tendered or required to be tendered for repurchase pursuant to the
second sentence of subparagraph (D)(3)(a). During any such suspension period,
the Corporation shall continue to repurchase Common Stock tendered to the
Corporation pursuant to any other provision of this Certificate of
Incorporation, but (a) payment for such repurchases shall not be required until
sixty (60) days after the end of the suspension period, (b) such payment shall
be made without interest, and (c) the repurchase price shall be the Common Share
Price determined as of (i) the end of the prior fiscal year, in the case of a
suspension period that ends before July 1 of the fiscal year, (provided that
such computation of the Share Price shall be reduced by the amount of dividends
per share declared on the Common Stock since the end of the prior fiscal year),
or (ii) in the case of a suspension period that ends after June 30 of a fiscal
year, the end of the fiscal year during which the suspension period ends.
 
    (E) Payments Where Stock Price Not Yet Computed. If the price at which the
Corporation is to purchase stock pursuant to any provision in this Certificate
of Incorporation has not been computed within the time period prescribed for
payment for such stock because the preparation of the audited Consolidated
Financial Statements of the Corporation and Consolidated Subsidiaries has not
yet been completed, the Corporation shall, within the time period prescribed for
payment for such stock, make an initial payment in
 
                                      E-8
<PAGE>
an amount equal to the price that would have been paid for such stock if it had
been purchased by the Corporation during the next preceding fiscal year. The
balance shall be paid within ten (10) days after the date on which the price at
which the Corporation is to purchase such stock has been computed. In the event
that the price at which the Corporation is to purchase such stock is less than
the amount paid by the Corporation, in the "initial payment" provided for in
this paragraph (E), the Corporation shall be entitled to recover the difference
between the two amounts. Such difference shall be paid by the person or entity
to whom the Corporation made the "initial payment" within ten (10) days of the
date of a written notice from the Corporation to pay such amount, without
interest.
 
    (F) Ratification By Stockholders. Any contract, transaction or act of the
Corporation or of the directors, which shall be ratified by a majority of a
quorum of the stockholders then entitled to vote at any annual meeting or at any
special meeting called for such purpose, shall, so far as permitted by law and
by this Certificate of Incorporation, be as valid and as binding as though
ratified by every stockholder entitled to vote at such meeting.
 
    (G) Meetings, Offices, and Books Outside State of Delaware. The stockholders
and the Board of Directors may hold their meetings and the Corporation may have
one or more offices outside of the State of Delaware, and subject to the
provisions of the laws of said state, may keep the books of the Corporation
outside of said state and at such places as may be from time to time designated
by the Board of Directors.
 
    (H) Removal of Directors. At any meeting of the holders of the Common Stock
called for the purpose, any one or more of the directors may, by a majority vote
of the holders of the Common Stock at the time, be removed from office, with or
without cause, and another director or other directors be elected by such
majority vote of said holders of the Common Stock in the place or places of the
person or persons so removed, to serve for the remainder of his or their term or
terms, as the case may be; provided, however, that if less than all the
directors are to be removed, no individual director shall be removed without
cause when the votes cast against his removal would be sufficient to elect him
if then cumulatively voted at an annual election of all the directors.
 
    (I) By-Law Provisions for Conduct of Business. The Corporation may in its
by-laws make any other provisions or requirements for the conduct of the
business of the Corporation, provided the same be not inconsistent with the
provisions of this Certificate of Incorporation, or contrary to the laws of the
State of Delaware. The by-laws may be amended by affirmative vote of two-thirds
of the whole Board of Directors or by affirmative vote of the holders of
two-thirds of the Common Stock issued and outstanding
 
    (J) Requirements of Votes Greater Than Required By-Law. Whenever this
Certificate of Incorporation contains provisions requiring for any corporate
action the vote of a larger portion of the stock or a larger portion of the
directors than is required by the General Corporation Law of the State of
Delaware, the provisions of this Certificate of Incorporation shall govern and
control.
 
    (K) Amendments of Certificate. Subject to any limitations herein contained,
the Corporation reserves the right to amend, alter, change or repeal any
provision contained in this Certificate of Incorporation, or in any amendment
thereto by an affirmative vote of the holders of two-thirds of the Common Stock
issued and outstanding,, and all rights conferred upon stockholders in said
Certificate of Incorporation or any amendment thereto, are granted subject to
this reservation; provided, however, that the provisions of this Certificate of
Incorporation requiring for action by the stockholders a vote greater than such
two-thirds vote shall not be amended except by such greater vote; and provided
further that this Paragraph (K) shall not be amended except by an affirmative
vote of the holders of four-fifths of the Common Stock issued and outstanding.
 
                                      E-9
<PAGE>
                                ARTICLE SEVENTH
 
                            LIMITATION OF LIABILITY
 
    A director of this Corporation shall not be personally liable to the
Corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director, except for liability (i) for any breach of the director's
duty of loyalty to the Corporation or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law, (iii) under Section 174 of the Delaware General Corporation
Law, or (iv) for any transaction from which the director derived an improper
personal benefit. If the Delaware General Corporation Law is amended after
approval by the stockholders of this ARTICLE SEVENTH to authorize corporate
action further eliminating or limiting the personal liability of directors, then
the liability of a director of the Corporation shall be eliminated or limited to
the fullest extent permitted by the Delaware General Corporation Law as so
amended. Any repeal or modification of the foregoing paragraph by the
stockholders of the Corporation shall not adversely affect any right or
protection of a director of the Corporation existing at the time of such repeal
or modification.
 
                                 ARTICLE EIGHTH
 
                                  DEFINITIONS
 
    As used in this Certificate of Incorporation, the following meanings (with
terms defined in the singular having comparable meaning when used in the plural
and vice versa), unless another definition is provided or the context otherwise
requires:
 
    "Formula Value" means the sum of:
 
    (a) the total stockholders' equity as shown on the consolidated balance
sheet contained in the Consolidated Financial Statements of the Corporation and
Consolidated Subsidiaries, prepared in conformity with generally accepted
accounting principles applied on a consistent basis for the Corporation and its
consolidated Subsidiaries as of the fiscal year end immediately preceding the
date of determination (the "prior year end") and audited and certified by an
independent firm of certified public accountants selected and engaged by the
Board of Directors; minus
 
    (b) the sum of: (i) the book value of Property, Plant and Equipment as of
the prior year end; plus (ii) the total stockholders' equity attributable to any
issued and outstanding Preferred Stock, as reflected on the consolidated balance
sheet, plus the amount of any accrued, accumulated and undeclared dividends
thereon, all as of the date of determination.
 
    "Common Share Price" with respect to any share of Common Stock, means the
amount determined by dividing:
 
    (a) the sum of (i) the Formula Value plus (ii) the face amount of any
outstanding Convertible Debentures convertible into Common Stock , determined as
of the fiscal year end immediately preceding the date of determination (the
"prior year end"); by
 
    (b) the sum of (i) the total number of issued and outstanding shares of
Common Stock, plus (ii) the total number of shares of Common Stock reserved for
the conversion of outstanding Convertible Debentures convertible into Class C
Stock, in each case determined as of the prior year end;
 
and deducting from the quotient (rounded to the nearest $0.05) the amount of any
dividends per share declared on Common Stock subsequent to the prior year end.
 
    "Convertible Debenture" means any debenture or other instrument evidencing
indebtedness of the Corporation convertible at any time into shares of the
Common Stock.
 
                                      E-10
<PAGE>
    "Employee" means an individual employed by the Corporation, any Subsidiary
or Twenty Percent Subsidiary or any joint venture in which the Corporation
and/or any Subsidiary or Twenty Percent Subsidiary has a twenty percent or more
interest. An Employee shall also include any person serving on the Board of
Directors of the Corporation or of any Subsidiary; provided, however, that this
provision shall be applicable only if such person shall have previously owned
stock of the Corporation as an employee; and, provided further, that such person
shall not be eligible to purchase additional stock of the Corporation.
 
    "Property, Plant and Equipment" means those assets included within such
classification as reflected on the consolidated balance sheets contained as a
part of the Consolidated Financial Statements of the Corporation and
Consolidated Subsidiaries, that are utilized in or associated with the
Corporation's ordinary and regular course of construction activities.
 
    "Subsidiary" means a corporation, partnership or other entity with respect
to which the Corporation holds, directly or indirectly, at least a majority of
the issued and outstanding capital stock or other equity interests, measured in
terms of total dollar value if such entity has outstanding more than one class
of capital stock or other equity interests.
 
    "Twenty Percent Subsidiary" means a corporation, partnership, or other
entity with respect to which the Corporation owns, directly or indirectly,
twenty percent or more of the issued and outstanding capital stock or other
equity interests, measured in terms of total dollar value if such corporation,
partnership or other entity has outstanding more than one class of capital stock
or other equity interests.
 
    IN WITNESS WHEREOF, PKS Holdings, Inc. has caused this Restated Certificate
of Incorporation, to be signed and attested by its duly authorized officers as
of the   day of           , 1997.
 
                                          PKS HOLDINGS, INC.
 
                                          By:
- --------------------------------------------------------------------------------
 
                                             Kenneth E. Stinson, President
 
ATTEST:
 
By:
- --------------------------------------
 
   Thomas C. Stortz, Secretary
 
                                      E-11
<PAGE>
                            PETER KIEWIT SONS', INC.
                 PROXY SOLICITED BY THE BOARD OF DIRECTORS FOR
    THE SPECIAL MEETING OF STOCKHOLDERS,                             , 1997
 
PROXY
 
    The undersigned hereby appoints                     ,
and                     , or any of them or their substitutes, as proxies, each
with the power to appoint his substitute, and hereby authorizes them to
represent and to vote, as designated below, all the shares of common stock of
Peter Kiewit Sons', Inc. held of record by the undersigned at the close of
business on                         , 1997, at the Special Meeting of
Stockholders to be held                    ,                             , 1997,
or any adjournment or postponement thereof. In their discretion, the proxies are
authorized to vote upon such other business as may properly come before the
meeting.
 
    This proxy, when properly executed, will be voted in the manner directed
herein by the undersigned. If no direction is made, this proxy will be voted FOR
proposals 1 and 2.
 
TO ENSURE YOUR REPRESENTATION AT THE SPECIAL MEETING, YOU ARE URGED TO COMPLETE,
SIGN AND DATE THIS PROXY CARD AND RETURN IT AS PROMPTLY AS POSSIBLE IN THE
ENCLOSED POSTAGE-PREPAID ENVELOPE.
 
    The undersigned hereby acknowledges receipt of the Notice of Special Meeting
and the Proxy Statement/Joint Prospectus, dated       , 1997.
 
/X/  PLEASE MARK YOUR
 
   VOTES AS IN THIS EXAMPLE.
 
<TABLE>
<S>                                                    <C>        <C>         <C>
                                                          FOR      AGAINST     ABSTAIN
1. Ratification of the decision of the Board of           / /        / /         / /
Directors of PKS (the "PKS Board") to separate the
construction business of PKS and the diversified
business of PKS into two independent companies. The
PKS Board would effect this separation by (i)
declaring a dividend of eight-tenths of one warrant
(a "Warrant") to purchase Class D Diversified Group
Convertible Exchangeable Common Stock, par value
$.0625 per share ("Class D Stock"), of PKS with
respect to each outstanding share of Class C
Construction & Mining Group Restricted Redeemable
Convertible Exchangeable Common Stock, par value
$.0625 per share ("Class C Stock") of PKS, and (ii)
causing each outstanding share of Class C Stock to be
mandatorily exchanged by resolution of the PKS Board
pursuant to existing provisions of the PKS Restated
Certificate of Incorporation (the "PKS Certificate")
for one share of Common Stock, par value $.01 per
share, of PKS Holdings, Inc., a newly formed, direct,
wholly owned subsidiary of PKS, to which the
eight-tenths of a Warrant would attach (collectively,
the "Transaction").
</TABLE>
 
<PAGE>
 
<TABLE>
<S>                                                    <C>        <C>         <C>
                                                          FOR      AGAINST     ABSTAIN
 
2. Approval of amendments of the PKS Certificate, to      / /        / /         / /
be implemented only if the Transaction is
consummated, to change the name of PKS to
"Diversified Holdings, Inc.", redesignate Class D
Stock as "Common Stock, par value $.01 per share",
modify the repurchase rights to which the holders of
Class D Stock are entitled, delete the provisions
regarding Class C Stock, add certain corporate
governance provisions and make certain other changes
described in the accompanying Proxy Statement/Joint
Prospectus.
</TABLE>
 
<TABLE>
<S>                                                       <C>
SIGNATURE(S)                                              DATE
SIGNATURE(S)                                              DATE
</TABLE>
 
NOTE: Please sign exactly as name appears hereon. Joint owners should each sign.
      When signing as attorney, executor, administrator, trustee or guardian,
      please indicate full title as such. Please mark, sign, date and return the
      proxy promptly in the enclosed postage paid envelope.
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20.       INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
    Section 145 of the Delaware General Corporation Law (the "DGCL") empowers a
Delaware corporation to indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative
(other than an action by or in the right of such corporation) by reason of the
fact that such person is or was a director, officer, employee or agent of such
corporation, or is or was serving at the request of such corporation as a
director, officer, employee or agent of another corporation or enterprise. A
corporation may, in advance of the final disposition of any civil, criminal,
administrative or investigative action, suit or proceeding, pay the expenses
(including attorneys' fees) incurred by any officer, director, employee or agent
in defending such action, provided that the director or officer undertake to
repay such amount if it shall ultimately be determined that he or she in not
entitled to be indemnified by the corporation. A corporation may indemnify such
person against expenses (including attorneys' fees), judgments, fines and
amounts paid in settlement actually and reasonably incurred by such person in
connection with such action, suit or proceeding if he or she acted in good faith
and in a manner he or she reasonably believed to be in or not opposed to the
best interests of the corporation, and, with respect to any criminal action or
proceeding, had no reasonable cause to believe his or her conduct was unlawful.
 
    A Delaware corporation may indemnify officers and directors in an action by
or in the right of the corporation to procure a judgment in its favor under the
same conditions, except that no indemnification is permitted without judicial
approval if the officer or director is adjudicated to be liable to the
corporation. Where an officer or director is successful on the merits or
otherwise in the defense of any action referred to above, the corporation must
indemnify him or her against the expenses (including attorneys' fees) which he
or she actually and reasonably incurred in connection therewith. The
indemnification provided is not deemed to be exclusive of any other rights to
which an officer or director may be entitled under any corporation's by-law,
agreement, vote or otherwise.
 
    Section 145 of the DGCL empowers a Delaware corporation to purchase and
maintain insurance on behalf of its officers and directors against any liability
asserted against them incurred while acting in such capacities or arising out of
their status as such.
 
    In accordance with Section 145 of the DGCL, Article Sixth of the PKS
Certificate and Section 51 of the PKS By-laws provide that PKS shall indemnify
each person who is or was a director, officer or employee of PKS (including the
heirs, executors, administrators or estate of such person) or is or was serving
at the request of PKS as a director, officer or employee of another corporation,
partnership, joint venture, trust or other enterprise, to the fullest extent
permitted under subsections 145(a), (b) and (c) of the DGCL or any successor
statute. The indemnification provided by the PKS Certificate and the PKS By-laws
shall not be deemed exclusive of any other rights to which any of those seeking
indemnification or advancement of expenses may be entitled under any by-law,
agreement, vote of shareholders or disinterested directors or otherwise, both as
to action in such person's official capacity and as to action in another
capacity while holding such office, and shall continue as to a person who has
ceased to be a director, officer, employee or agent and shall inure to the
benefit of the heirs, executors and administrators of such a person. Article
[seventh] of the PKS Certificate provides that a director of PKS shall not be
personally liable to PKS or its stockholders for monetary damages for breach of
fiduciary duty as a director, except for liability (i) for any breach of the
director's duty of loyalty to PKS or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law, (iii) under Section 174 of the DGCL, or (iv) for any
transaction from which the director derived an improper personal benefit. If the
DGCL is amended further eliminating or limiting the personal liability of
directors, then the liability of a director of PKS shall be eliminated or
limited to the fullest extent permitted by the DGCL as so amended.
 
                                      II-1
<PAGE>
    The PKS Holdings Certificate and PKS By-laws will contain provisions with
respect to the indemnification and limitation on liability of directors
indentical to those included in the PKS Certificate and PKS By-laws.
 
    In accordance with Section 145 of the DGCL, pursuant to the Certificate
Amendments, Article VIII of the Diversified Holdings Certificate and Article
VIII the Diversified Holdings By-Laws will provide that Diversified Holdings
shall indemnify each person who is or was a director, officer or employee of
Diversified Holdings (including the heirs, executors, administrators or estate
of such person) or is or was serving at the request of Diversified Holdings as
director, officer or employee of another corporation, partnership, joint
venture, trust or other enterprise, to the fullest extent permitted under
subsections 145(a), (b), and (c) of the DGCL or any successor statute. The
indemnification to be provided by the Diversified Holdings Certificate and the
Diversified Holdings By-Laws shall not be deemed exclusive of any other rights
to which any of those seeking indemnification or advancement of expenses may be
entitled under any by-law, agreement, vote of stockholders or disinterested
directors or otherwise, both as to action in his or her official capacity and as
to action in another capacity while holding such office, and shall continue as
to a person who has ceased to be a director, officer, employee or agent and
shall inure to the benefit of the heirs, executors and administrators of such a
person. Expenses (including attorneys' fees) incurred in defending a civil,
criminal, administrative or investigative action, suit or proceeding upon
receipt of an undertaking by or on behalf of the indemnified person to repay
such amount if it shall ultimately be determined that he or she is not entitled
to be indemnified by Diversified Holdings. The Diversified Holdings Certificate
will further provide that a director of Diversified Holdings shall not be
personally liable to Diversified Holdings or its stockholders for monetary
damages for breach of fiduciary duty as a director, except for liability (i) for
any breach of the director's duty of loyalty to Diversified Holdings or its
stockholders, (ii) for acts or omissions not in good faith or which involve
intentional misconduct or a knowing violation of law, (iii) under Section 174 of
the DGCL, or (iv) for any transaction from which the director derived an
improper personal benefit. If the DGCL is amended to authorize corporate action
further eliminating or limiting the personal liability of directors, then the
liability of a director of Diversified Holdings shall be eliminated or limited
to the fullest extent permitted by the DGCL as so amended.
 
    The Diversified Holdings By-Laws will provide that Diversified Holdings may
purchase and maintain insurance on behalf of its directors, officers, employees
and agents against any liabilities asserted against such persons arising out of
such capacities.
 
                                      II-2
<PAGE>
ITEM 21.       EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
    Exhibits
 
<TABLE>
<CAPTION>
                                                                                                           SEQUENTIAL
 EXHIBIT NO.                                           DESCRIPTION                                          PAGE NO.
- -----------------  -----------------------------------------------------------------------------------  -----------------
<C>                <S>                                                                                  <C>
 
           2.1*    Form of Separation Agreement between PKS Holdings and PKS
 
           2.2     Form of Warrant Agreement
 
           3.1     Restated Certificate of Incorporation of PKS (incorporated by reference to Exhibit
                   3.1 to the PKS Annual Report on Form 10-K for the fiscal year ended December 28,
                   1996 which incorporates by reference Exhibit 3.1 to the PKS Annual Report on Form
                   10-K for the fiscal year ended December 28, 1991)
 
           3.2     Amended and Restated By-laws of PKS (incorporated by reference to Exhibit 3.4 to
                   the PKS Annual Report on Form 10-K for the fiscal year ended December 28, 1996
                   which incorporates by reference Exhibit 3.4 to the PKS Annual Report on Form 10-K
                   for the fiscal year ended December 26, 1992)
 
           3.3     Form of Proposed Second Restated Certificate of Incorporation of PKS (renamed
                   Diversified Holdings, Inc.) (included as Appendix E to the Proxy Statement/Joint
                   Prospectus contained herein)
 
           3.4*    Form of Proposed Amended and Restated By-laws of PKS
 
           3.5     Certificate of Incorporation of PKS Holdings
 
           3.6     By-laws of PKS Holdings
 
           3.7     Form of Proposed Restated Certificate of Incorporation of PKS Holdings (included as
                   Appendix D to the Proxy Statement/Joint Prospectus contained herein)
 
           3.8*    Form of Proposed Restated By-laws of PKS Holdings
 
           5 *     Opinion of Willkie Farr & Gallagher relating to legality of the PKS Holdings stock,
                   the Warrants and the Diversified Holdings Stock issuable upon exercise of the
                   Warrants
 
          15       Letter of Coopers & Lybrand L.L.P. relating to unaudited pro forma financial
                   information of PKS and Kiewit Construction and Mining Group
 
          23.1     Consent of Coopers & Lybrand L.L.P. relating to PKS and PKS Holdings financial
                   statements
 
          23.2*    Consent of Willkie Farr & Gallagher (included in its opinion filed as Exhibit 5)
 
          23.3*    Consent of Gleacher NatWest, Inc.
 
          24 *     Powers of Attorney (included on signature pages)
 
          99.1*    Tax Allocation Agreement between PKS and PKS Holdings
 
          99.2*    Executive Retention Agreement among James Q. Crowe, PKS and KDG
 
          99.3     Consent of R. Douglas Bradbury
</TABLE>
 
                                      II-3
<PAGE>
<TABLE>
<CAPTION>
                                                                                                           SEQUENTIAL
 EXHIBIT NO.                                           DESCRIPTION                                          PAGE NO.
- -----------------  -----------------------------------------------------------------------------------  -----------------
<C>                <S>                                                                                  <C>
          99.4     Consent of Robert E. Julian
 
          99.5     Consent of David C. McCourt
 
          99.6     Consent of Michael B. Yanney
 
          99.7*    Opinion of Gleacher NatWest, Inc.
</TABLE>
 
- ------------------------
 
*   To be Filed by Amendment
 
ITEM 22.       UNDERTAKINGS
 
    1. The undersigned registrants hereby undertake:
 
        a) To file, during any period in which offers or sales are being made, a
    post-effective amendment to this Registration Statement;
 
           (i) To include any prospectus required by Section 10(a)(3) of the
       Securities Act;
 
           (ii) To reflect in the prospectus any facts or events arising after
       the effective date of the registration statement (or the most recent
       post-effective amendment thereof) which, individually or in the
       aggregate, represent a fundamental change in the information set forth in
       the registration statement. Notwithstanding the foregoing, any increase
       or decrease in volume of securities offered (if the total dollar value of
       securities offered would not exceed that which was registered) and any
       deviation from the low or high end of the estimated maximum offering
       range may be reflected in the form of prospectus filed with the
       Commission pursuant to Rule 424(b) if, in the aggregate, the changes in
       volume and price represent no more than a 20 percent change in the
       maximum aggregate offering price set forth in the "Calculation of
       Registration Fee" table in the effective registration statement;
 
           (iii) To include any material information with respect to the plan of
       distribution not previously disclosed in the Registration Statement or
       any material change to such information in the Registration Statement.
 
        b) That, for the purpose of determining any liability under the
    Securities Act, each such post-effective amendment shall be deemed to be a
    new registration statement relating to the securities offered therein, and
    the offering of such securities at that time shall be deemed to be the
    initial bona fide offering thereof.
 
        c) To remove from registration by means of a post-effective amendment
    any of the securities being registered which remain unsold at the
    termination of the offering.
 
    2. Each of the undersigned registrants hereby undertakes that, for purposes
of determining any liability under the Securities Act, each filing of such
registrant's annual report pursuant to section 13(a) or section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to section 15(d) of the Exchange Act) that is
incorporated by reference in the registration statement shall be deemed to be a
new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial BONA
FIDE offering thereof.
 
    3. Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of each of
the registrants pursuant to the foregoing provisions, or otherwise, each of the
registrants has been advised that in the opinion of the Commission such
indemnification is against public policy as expressed in the Securities Act and
is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by each of the registrants of
expenses incurred or paid by a director, officer or controlling person of such
registrant in the
 
                                      II-4
<PAGE>
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, each registrant will, unless in the opinion of its counsel the
matter has been settled by controlling precedent, submit to a court of
appropriate jurisdiction the question whether such indemnification by it is
against public policy as expressed in the Securities Act and will be governed by
the final adjudication of such issue.
 
    4. Each of the undersigned registrants hereby undertakes to respond to
requests for information that is incorporated by reference into the joint
prospectus pursuant to Item 4, 10(b), 11, or 13 of this form, within one
business day of receipt of such request, and to send the incorporated documents
by first class mail or other equally prompt means. This includes information
contained in documents filed subsequent to the effective date of the
registration statement through the date of responding to the request.
 
    5. Each of the undersigned registrants hereby undertakes to supply by means
of a post-effective amendment all information concerning a transaction, and the
company being acquired involved therein, that was not the subject of and
included in the registration statement when it became effective.
 
    6. Each of the undersigned registrants hereby undertakes that:
 
        a) For purposes of determining any liability under the Securities Act,
    the information omitted from the form of prospectus filed as part of this
    Registration Statement in reliance upon Rule 430A and contained in a form of
    prospectus filed by MFS pursuant to Rule 424(b)(1) or (4) or 497(h) under
    the Securities Act shall be deemed to be part of the Registration Statement
    as of the time it was declared effective.
 
        b) For the purpose of determining any liability under the Securities
    Act, each post-effective amendment that contains a form of prospectus shall
    be deemed to be a new Registration Statement relating to the securities
    offered therein, and this offering of such securities at that time shall be
    deemed to be the initial bona fide offering thereof.
 
                                      II-5
<PAGE>
                                   SIGNATURES
 
    Pursuant to the requirements of the Securities Act of 1933, each of the
Registrants has duly caused this Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in Omaha, Nebraska on
August 29, 1997.
 
<TABLE>
  <S>  <C>                                         <C>  <C>
  PETER KIEWIT SONS', INC.                         PKS HOLDINGS, INC.
 
                /s/  MATTHEW J. JOHNSON                           /s/  THOMAS C. STORTZ
  By:                                              By:
        ----------------------------------------         ----------------------------------------
                   Matthew J. Johnson                                Thomas C. Stortz
                 Vice President--Legal                                Vice President
</TABLE>
 
                                      II-6
<PAGE>
                PETER KIEWIT SONS', INC. DIRECTORS AND OFFICERS
                               POWER OF ATTORNEY
 
    Each of the undersigned officers and directors of Peter Kiewit Sons', Inc.
hereby severally constitutes and appoints James Q. Crowe and Matthew J. Johnson
and each of them as the attorneys-in-fact for the undersigned, in any and all
capacities, with full power of substitution, to sign any and all pre- or post-
effective amendments to this Registration Statement, any subsequent Registration
Statement for the same offering which may be filed under Rule 462(b) under the
Securities Act of 1933 and any and all pre- or post-effective amendments
thereto, and to file the same with exhibits thereto and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorney-in-fact, and each of them, full power and authority to do and
perform each and every act and thing requisite and necessary to be done in and
about the premises, as fully to all intents and purposes as he might or could do
in person, hereby ratifying and confirming all that each said attorney-in-fact,
or either of them, may lawfully do or cause to be done by virtue hereof.
 
    Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
 
          SIGNATURE                       TITLE                    DATE
- ------------------------------  --------------------------  -------------------
 
    /s/ WALTER SCOTT, JR.       Chairman of the Board and     August 29, 1997
- ------------------------------    President
      Walter Scott, Jr.           (Principal Executive
                                  Officer and
                                  Principal Financial
                                  Officer)
 
   /s/ WILLIAM L. GREWCOCK      Vice Chairman and Director    August 29, 1997
- ------------------------------
     William L. Grewcock
 
    /s/ KENNETH E. STINSON      Executive Vice President      August 29, 1997
- ------------------------------    and Director
      Kenneth E. Stinson
 
    /s/ ERIC J. MORTENSEN       Controller                    August 29, 1997
- ------------------------------    (Principal Accounting
      Eric J. Mortensen           Officer)
 
      /s/ RICHARD GEARY         Director                      August 29, 1997
- ------------------------------
        Richard Geary
 
     /s/ RICHARD R. JAROS       Director                      August 29, 1997
- ------------------------------
       Richard R. Jaros
 
   /s/ GEORGE B. TOLL, JR.      Director                      August 29, 1997
- ------------------------------
     George B. Toll, Jr.
 
     /s/ RICHARD W. COLF        Director                      August 29, 1997
- ------------------------------
       Richard W. Colf
 
    /s/ BRUCE E. GREWCOCK       Director                      August 29, 1997
- ------------------------------
      Bruce E. Grewcock
 
     /s/ TAIT P. JOHNSON        Director                      August 29, 1997
- ------------------------------
       Tait P. Johnson
 
    /s/ ALLEN K. KIRKWOOD       Director                      August 29, 1997
- ------------------------------
      Allen K. Kirkwood
 
                                      II-7
<PAGE>
<TABLE>
<CAPTION>
<S>                             <C>                         <C>
          SIGNATURE                       TITLE                    DATE
- ------------------------------  --------------------------  -------------------
      /s/ JAMES Q. CROWE        Director                      August 29, 1997
- ------------------------------
        James Q. Crowe
 
   /s/ ROBERT B. DAUGHERTY      Director                      August 29, 1997
- ------------------------------
     Robert B. Daugherty
 
    /s/ CHARLES M. HARPER       Director                      August 29, 1997
- ------------------------------
      Charles M. Harper
 
    /s/ PETER KIEWIT, JR.       Director                      August 29, 1997
- ------------------------------
      Peter Kiewit, Jr.
 
</TABLE>
                                      II-8
<PAGE>
                   PKS HOLDINGS, INC. DIRECTORS AND OFFICERS
 
                               POWER OF ATTORNEY
 
    Each of the undersigned officers and directors of PKS Holdings, Inc. hereby
severally constitutes and appoints Kenneth E. Stinson and Thomas C. Stortz and
each of them as the attorneys-in-fact for the undersigned, in any and all
capacities, with full power of substitution, to sign any and all pre- or post-
effective amendments to this Registration Statement, any subsequent Registration
Statement for the same offering which may be filed under Rule 462(b) under the
Securities Act of 1933 and any and all pre- or post-effective amendments
thereto, and to file the same with exhibits thereto and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorney-in-fact, and each of them, full power and authority to do and
perform each and every act and thing requisite and necessary to be done in and
about the premises, as fully to all intents and purposes as he might or could do
in person, hereby ratifying and confirming all that each said attorney-in-fact,
or either of them, may lawfully do or cause to be done by virtue hereof.
 
    Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
 
SIGNATURE                                 TITLE                    DATE
- ------------------------------  --------------------------  -------------------
 
    /s/ WALTER SCOTT, JR.
- ------------------------------  Director                      August 29, 1997
      Walter Scott, Jr.
 
    /s/ KENNETH E. STINSON      President (Principal
- ------------------------------    Executive Officer) and      August 29, 1997
      Kenneth E. Stinson          Director
 
      /s/ RICHARD GEARY
- ------------------------------  Executive Vice President      August 29, 1997
        Richard Geary             and Director
 
   /s/ GEORGE B. TOLL, JR.
- ------------------------------  Executive Vice President      August 29, 1997
     George B. Toll, Jr.          and Director
 
    /s/ BRUCE E. GREWCOCK
- ------------------------------  Executive Vice President      August 29, 1997
      Bruce E. Grewcock           and Director
 
     /s/ THOMAS C. STORTZ
- ------------------------------  Vice President and            August 29, 1997
       Thomas C. Stortz           Director
 
                                      II-9
<PAGE>

SIGNATURE                                 TITLE                    DATE
- ------------------------------  --------------------------  -------------------
 
     /s/ RICHARD W. COLF
- ------------------------------  Director                      August 29, 1997
       Richard W. Colf
 
     /s/ TAIT P. JOHNSON
- ------------------------------  Director                      August 29, 1997
       Tait P. Johnson
 
   /s/ ALLAN KEITH KIRKWOOD
- ------------------------------  Director                      August 29, 1997
     Allan Keith Kirkwood
 
   /s/ WILLIAM L. GREWCOCK
- ------------------------------  Director                      August 29, 1997
     William L. Grewcock
 
      /s/ JAMES Q. CROWE
- ------------------------------  Director                      August 29, 1997
        James Q. Crowe
 
    /s/ PETER KIEWIT, JR.
- ------------------------------  Director                      August 29, 1997
      Peter Kiewit, Jr.
 
      /s/ KENNETH JANTZ         Vice President and
- ------------------------------    Treasurer (Principal        August 29, 1997
        Kenneth Jantz             Accounting Officer)
 
      /s/ STEPHEN SHARPE
- ------------------------------  Vice President (Principal     August 29, 1997
        Stephen Sharpe            Financial Officer)
 
                                     II-10
<PAGE>
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
                                                                                                           SEQUENTIAL
 EXHIBIT NO.                                           DESCRIPTION                                          PAGE NO.
- -----------------  -----------------------------------------------------------------------------------  -----------------
<C>                <S>                                                                                  <C>
 
           2.1*    Form of Separation Agreement between PKS Holdings and PKS
 
           2.2     Form of Warrant Agreement
 
           3.1     Restated Certificate of Incorporation of PKS (incorporated by reference to Exhibit
                     3.1 to the PKS Annual Report on Form 10-K for the fiscal year ended December 28,
                     1996 which incorporates by reference to Exhibit 3.1 to the PKS Annual Report on
                     Form 10-K for the fiscal year ended December 28, 1991)
 
           3.2     Amended and Restated By-laws of PKS (incorporated by reference to Exhibit 3.4 to
                     the PKS Annual Report on Form 10-K for the fiscal year ended December 28, 1996
                     which incorporates by reference to Exhibit 3.4 to the PKS Annual Report on Form
                     10-K for the fiscal year ended December 26, 1992)
 
           3.3     Form of Proposed Second Restated Certificate of Incorporation of PKS (renamed
                     Diversified Holdings, Inc.) (included as Appendix E to the Proxy Statement/Joint
                     Prospectus contained herein)
 
           3.4*    Form of Proposed Amended and Restated By-laws of PKS
 
           3.5     Certificate of Incorporation of PKS Holdings
 
           3.6     By-laws of PKS Holdings
 
           3.7     Form of Proposed Restated Certificate of Incorporation of PKS Holdings (included as
                     Appendix D to the Proxy Statement/Joint Prospectus contained herein)
 
           3.8*    Form of Proposed Restated By-laws of PKS Holdings
 
           5 *     Opinion of Willkie Farr & Gallagher relating to legality of the PKS Holdings stock,
                     the Warrants and the Diversified Holdings Stock issuable upon exercise of the
                     Warrants
 
          15       Letter of Coopers & Lybrand L.L.P. relating to unaudited pro forma financial
                     information of PKS and Kiewit Construction and Mining Group
 
          23.1     Consent of Coopers & Lybrand L.L.P. relating to PKS and PKS Holdings financial
                     statements
 
          23.2*    Consent of Willkie Farr & Gallagher (included in its opinion filed as Exhibit 5)
 
          23.3*    Consent of Gleacher NatWest, Inc.
 
          24 *     Powers of Attorney (included on signature pages)
 
          99.1*    Tax Allocation Agreement between PKS and PKS Holdings
 
          99.2*    Executive Retention Agreement among James Q. Crowe, PKS and KDG
 
          99.3     Consent of R. Douglas Bradbury
 
          99.4     Consent of Robert E. Julian
 
          99.5     Consent of David C. McCourt
 
          99.6     Consent of Michael B. Yanney
 
          99.7*    Opinion of Gleacher NatWest, Inc.
</TABLE>
 
- ------------------------
 
*   To be Filed by Amendment

<PAGE>




================================================================================



                                 WARRANT AGREEMENT
                                          
                                          
                                      between
                                          
                                          
                              PETER KIEWIT SONS', INC.
                                          
                                          
                                        and
                        __________________________________,
                                   Warrant Agent
                                          
                                          
            Warrants to Purchase Class D Diversified Group Convertible 
               Exchangeable Common Stock, par value $.0625 per share
                                          
                                          
                                   _______, 1998



================================================================================

<PAGE>

<TABLE>
<CAPTION>
                                  TABLE OF CONTENTS
                                  -----------------
                                                                                 Page
                                                                                 ----
<S>                                                                                 <C>
SECTION 1.  Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

SECTION 2.  Appointment of Warrant Agent . . . . . . . . . . . . . . . . . . . . . .5

SECTION 3.  Amount Issued; Distribution to Holders of Class C Stock. . . . . . . . .5

SECTION 4.  Form of Warrant Certificates . . . . . . . . . . . . . . . . . . . . . .6

SECTION 5.  Execution of Warrant Certificates. . . . . . . . . . . . . . . . . . . .7

SECTION 6.  Registration and Countersignature. . . . . . . . . . . . . . . . . . . .7

SECTION 7.  Registration of Transfers and Exchanges. . . . . . . . . . . . . . . . .8

SECTION 8.  Duration and Exercise of Warrants. . . . . . . . . . . . . . . . . . . .9

SECTION 9.  Exercise of Warrants . . . . . . . . . . . . . . . . . . . . . . . . . 10

SECTION 10. Determination of Exercise Price; Obligation of the Company to 
            Provide Exercise Price Certificates and Appraisals . . . . . . . . . . 12

SECTION 11. Cancellation of Warrants . . . . . . . . . . . . . . . . . . . . . . . 13

SECTION 12. Payment of Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

SECTION 13. Mutilated or Missing Warrant Certificates. . . . . . . . . . . . . . . 14

SECTION 14. Reservation of Shares. . . . . . . . . . . . . . . . . . . . . . . . . 14

SECTION 15. Obtaining of Governmental Approvals and Stock Exchange Listings;  
            Prospectus Delivery. . . . . . . . . . . . . . . . . . . . . . . . . . 15

SECTION 16. Adjustment of Pricing Terms and Number of Shares Purchasable or
            Number of Warrants . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SECTION 17. Fractional Warrants and Fractional Shares. . . . . . . . . . . . . . . 21

SECTION 18. Notices to Holders . . . . . . . . . . . . . . . . . . . . . . . . . . 21

SECTION 19. Merger, Consolidation or Change of Name of Warrant Agent . . . . . . . 22

SECTION 20. Warrant Agent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

SECTION 21. Change of Warrant Agent. . . . . . . . . . . . . . . . . . . . . . . . 25

SECTION 22. Holder Not Deemed a Stockholder. . . . . . . . . . . . . . . . . . . . 26

SECTION 23. Delivery of Prospectus . . . . . . . . . . . . . . . . . . . . . . . . 26

SECTION 24. Notices to Company and Warrant Agent . . . . . . . . . . . . . . . . . 26

SECTION 25. Supplements and Amendments . . . . . . . . . . . . . . . . . . . . . . 27

SECTION 26. Successors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

SECTION 27. Termination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

SECTION 28. Governing Law. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

SECTION 29. Benefits of this Agreement . . . . . . . . . . . . . . . . . . . . . . 28

</TABLE>

                                         -i-
<PAGE>

SECTION 30. Counterparts. . . . . . . . . . . . . . . . . . . . . . . . . . 28

SECTION 31. Headings . .. . . . . . . . . . . . . . . . . . . . . . . . . . 28



SCHEDULE I    Investment Banks
EXHIBIT A          Form of Warrant
EXHIBIT B          Form of PKS Certificate
EXHIBIT C          Form of Private Exercise Price Certificate
EXHIBIT D          Form of Public Exercise Price Certificate
















                                         -ii-
<PAGE>

                                  WARRANT AGREEMENT

         This WARRANT AGREEMENT (the "Agreement") is dated as of _________,
1998, between PETER KIEWIT SONS', INC., a Delaware corporation (the "Company"),
and ______________________, a _________________, as warrant agent (the "Warrant
Agent").

         WHEREAS, pursuant to that certain Separation Agreement (the
"Separation Agreement"), dated as of _________, 1997 between the Company and PKS
Holdings, Inc., a Delaware corporation ("PKS"), the Company has agreed to (i)
issue as a dividend (the "Distributing Dividend") to the holders of its Class C
Construction & Mining Group Restricted Redeemable Convertible Exchangeable
Common Stock, par value $0.0625 per share ("Old Class C Stock"), on a pro rata
basis, an aggregate of up to ____________ Warrants (the "Warrants"), each
Warrant entitling the holder thereof to purchase one share (a "Share") of the
Company's Class D Diversified Group Convertible Exchangeable Common Stock, par
value $.0625 per share, which the Company will redesignate (the
"Redesignation"), following the Class C Exchange (as defined below), as its
Common Stock, par value $.01 per share (both before and after the Redesignation,
the "Common Stock") and (ii) attach eight-tenths of one Warrant to each share of
Class C Stock (as defined) outstanding on the date of such dividend;
WHEREAS, pursuant to the Separation Agreement and Article Fourth III(d)(1) of
the Company's Restated Certificate of Incorporation, the Company shall, after
the Distributing Dividend, exchange one share of common stock, par value $.01
per share, of PKS ("New Class C Stock") for each outstanding share of Old Class
C Stock (the "Class C Exchange"); and

         WHEREAS, the Warrant Agent, at the request of the Company, has agreed
to act as the agent of the Company in connection with the issuance,
registration, transfer, exchange and exercise of Warrants;

         NOW, THEREFORE, in consideration of the premises and mutual agreements
herein set forth, the parties hereto agree as follows:

         SECTION   DEFINITIONS.  Unless otherwise defined herein, the terms
defined in the introductory paragraph and the Recitals to this Agreement shall
have the respective meanings specified therein, and the following terms shall
have the meanings specified below:

         "Affiliate" shall have the meaning given to it in Rule 405 promulgated
    under the Securities Act.

         "Attached Transfer" shall mean the simultaneous transfer to the same
    transferee of a Warrant (or fraction thereof) and the share of Class C
    Stock to which such 

<PAGE>

    Warrant is attached; PROVIDED THAT such transfer of such share of Class C
    Stock is permitted by the Restated Certificate of Incorporation.

         "Base Discount" shall mean $25.00, subject to adjustment as provided
    in Section 16 hereof.

         "Base Price" shall mean $82.00 per share, subject to adjustment as
    provided in Section 16 hereof.

         "Business Day" means any day other than a Saturday, a Sunday or a day
    on which banking institutions in the City of New York, the city in which
    the Warrant Agent maintains its office in accordance with Section 7(b)
    hereof or at a place of payment are authorized by law, regulation or
    executive order to remain closed.

         "Cashless Exercise Ratio" means a fraction, the numerator of which is
    the Fixed Dollar Discount used in calculating the Exercise Price in effect
    on the Exercise Date, and the denominator of which is the Trading Price
    used in calculating the Exercise Price in effect on the Exercise Date.

         "Change of Control" shall mean the occurrence of any of the following:
    (i) the sale, lease, transfer, conveyance or other disposition (other than
    by way of merger or consolidation), in one or a series of related
    transactions, of all or substantially all of the assets of the Company and
    its subsidiaries taken as a whole, to any "person" (as such term is used in
    Section 13(d)(3) of the Exchange Act); (ii) the adoption of a plan relating
    to the liquidation or dissolution of the Company; (iii) the consummation of
    any transaction (including, without limitation, any merger or
    consolidation) the result of which is that any "person" (as defined above),
    becomes the "beneficial owner" (as such term is defined in Rule 13d-3 and
    Rule 13d-5 under the Exchange Act), directly or indirectly, of more than
    [  ]% of the total outstanding voting power of the Company; or (iv) the
    first day on which a majority of the members of the board of directors of
    the Company are not Continuing Directors.

         "Class C Stock" shall mean (i) prior to the Class C Exchange, Old
    Class C Stock, and (ii) after the Class C Exchange, New Class C Stock.

         "Continuing Director" shall mean, as of any date of determination, any
    member of the board of directors of the Company who (i) was a member of
    such board of directors immediately following the consummation of the Class
    C Exchange or (ii) was nominated for election or elected to such board of
    directors with the approval of a majority of 


                                         -2-
<PAGE>

    the Continuing Directors who were members of such board of directors at the
    time of such nomination or election.

         "Current Trading Value" of any Publicly Traded security on a given
    date shall mean the arithmetic mean of the daily Mean Reported Prices of
    such security for each Business Day during the period commencing on the
    fourteenth Business Day preceding such date and ending on such date.

         "Effective Date" shall mean the date of the occurrence of the
    Distributing Dividend.

         "Exchange Act" shall mean the Securities Exchange Act of 1934.

         "Exercise Conditions" shall mean, with respect the exercise or
    transfer of a given Warrant (or fraction thereof), (i) the occurrence of an
    Exercise Event with respect to such Warrant, and (ii) the receipt by the
    Warrant Agent of the related documentation required by Section 7 or Section
    9 hereof, as applicable.

         "Exercise Date" shall mean, for a given Warrant, the day on which such
    Warrant is exercised pursuant to Section 9 hereof.

         "Exercise Event" shall mean, with respect to a given Warrant (or
    fraction thereof), the occurrence of the earliest of: (i) the repurchase or
    redemption by the Company or PKS of the share of Class C Stock to which
    such Warrant is attached; (ii) the exchange of the share of Class C Stock
    to which such Warrant is attached into another class of securities of PKS
    intended to be issued primarily to persons leaving employment of PKS; (iii)
    April 15, 2006; and (iv) a Change of Control.

         "Exercise Price" shall mean, as of any given date, the Exercise Price
    set forth in the most recent Exercise Price Certificate delivered to, or
    prepared by, the Warrant Agent pursuant to Section 10 hereof prior to such
    date, subject to any adjustment required by Section 10(b) or Section 16
    hereof.

         "Exercise Price Certificate" shall mean either a Private Exercise
    Price Certificate or a Public Exercise Price Certificate.

         "Fixed Dollar Discount" shall mean (i) in the event that the Trading
    Price is greater than or equal to the Base Price, the Base Discount; (ii)
    in the event that the Trading Price is less than the Base Price, an amount
    equal to the Base Discount minus the amount by which the Base Price exceeds
    the Trading Price; PROVIDED, HOWEVER, that in no 


                                         -3-
<PAGE>

    event shall the Fixed Dollar Discount be less than the Minimum Discount.

         "Investment Bank" shall mean any investment bank listed on Schedule I
    hereto.

         "Mean Reported Price" shall mean on a given day with respect to any
    Publicly Traded security, the arithmetic mean between the highest reported
    asked price and the lowest reported bid price, in each case regular way,
    for such security, as reported on the Composite Quotation System, or, if
    such security is not reported on the Composite Quotation System, on the
    principal national securities exchange on which such security is listed or
    admitted to trading, or if such security is not listed or admitted to
    trading on any national securities exchange, reported by the Nasdaq
    National Market or Nasdaq SmallCap Market, as appropriate, or a similar
    organization if Nasdaq is no longer reporting such information.

         "Minimum Discount " shall mean $15.00, subject to adjustment as
    provided in Section 16 hereof.

         "NASD" shall mean the National Association of Securities Dealers, Inc.

         "Permitted Transfer" shall mean any transfer of a Warrant to the
    Company or any designee of the Company.

         "PKS Certificate" shall mean a duly completed and executed certificate
    of the PKS Stock Registrar, in the form of Exhibit B hereto.

         "Pricing Terms" shall mean the Base Discount, Base Price and Minimum
    Discount.

         "Private Exercise Period" shall mean the 20-day period commencing on
    the first day following the Warrant Agent's mailing to the registered
    holders of the Warrants of a Private Exercise Price Certificate.

         "Public Exercise Period" shall mean the period from and including the
    first Business Day of each calendar month, through and including the sixth
    day thereafter, except for the calendar month of April 2010, in which the
    Public Exercise Period shall end on April 15, 2010.

         "Publicly Traded" shall mean, with respect to any security, if such
    security is listed on a national securities exchange, or is traded on the
    Nasdaq National Market System or the Nasdaq SmallCap Market, and has been
    so listed or traded for at least 15 Business Days prior to the date in
    question.


                                         -4-
<PAGE>

         "Restricted Period Termination Date" shall mean, with respect to a
    given Warrant, the date on which the Exercise Conditions with respect to
    such Warrant have been satisfied.

         "Securities Act" shall mean the Securities Act of 1933, as amended.

         "Transfer Agent" shall mean the transfer agent for the Company's
    Common Stock.

         "Warrant Certificates" shall mean the certificates evidencing the
    Warrants, substantially in the form of Exhibit A hereto.

         Section 2 APPOINTMENT OF WARRANT AGENT.  As of the Effective Date, the
Company hereby appoints the Warrant Agent to act as agent for the Company in
accordance with the instructions hereinafter in this Agreement set forth; and
the Warrant Agent hereby accepts such appointment, upon the terms and conditions
hereinafter set forth.

         Section 3.  AMOUNT ISSUED; DISTRIBUTION TO HOLDERS OF CLASS C STOCK.

         (a)  Subject to the provisions of this Agreement, Warrants to purchase
    an aggregate of up to ___________ (__________) Shares shall be issued and
    delivered by the Company hereunder.

         (b)  The Company shall issue Warrants to each holder of Old Class C
    Stock pursuant to the Distributing Dividend on a pro rata basis, and attach
    eight-tenths of a Warrant to each outstanding share of Old Class C Stock. 
    Pursuant to the Separation Agreement, PKS shall, subject to certain
    conditions, conduct the Class C Exchange after the Distributing Dividend. 
    Upon the occurrence of the Class C Exchange, a Warrant (or fraction
    thereof) attached to a share of Old Class C Stock shall, automatically, and
    without further action by or on behalf of the Company, PKS, the Warrant
    Agent or the holder of such Warrant, Old Class C Stock or New Class C
    Stock, attach to the share of New Class C Stock for which such share of Old
    Class C Stock was exchanged.

         (c)  Except as described in Section 3(b), a Warrant (or fraction
    thereof) shall detach from the share of Class C Stock to which it is
    attached only upon the occurrence of the Exercise Condition with respect to
    such Warrant (or fraction thereof.

         (d)  The Company shall only deliver Warrant Certificates representing
    Warrants after the occurrence of the Class C Exchange.  As promptly as
    practicable following 


                                         -5-
<PAGE>

    the Class C Exchange, the Company shall mail to each record holder of Old
    Class C Stock as of the effective date of Class C Exchange, appropriate
    documentation for such holder to use in surrendering to the Company the
    certificates which represented such holder's Old Class C Stock in exchange
    for (x) a certificate representing the number of shares of New Class C
    Stock to which such holder is entitled pursuant to the Class C Exchange and
    (y) certificates representing the Warrants attached to those shares of New
    Class C Stock.  The Company shall mail, as promptly as practicable after
    the Class C Exchange, to each registered holder of Warrants who is not at
    that time a registered owner of New Class C Stock, at such holder's address
    appearing on the Warrant Registration, Warrant Certificates representing
    such holder's Warrants.

Section 4.  FORM OF WARRANT CERTIFICATES.

         (a)  Warrant Certificates to be delivered pursuant to this Agreement
    shall be in registered form only.  The Warrant Certificates and the forms
    of election to purchase Shares and of assignment shall be in substantially
    the form set forth in Exhibit A hereto together with such appropriate
    insertions, omissions, substitutions and other variations as are required
    or permitted by this Agreement, and may have such letters, numbers or other
    marks of identification and such legends or endorsements placed thereon as
    may be required to comply with any law or with any rules made pursuant
    thereto or with any rules of any securities exchange or as may,
    consistently herewith, be determined by the officers executing such
    Warrants, as evidenced by their execution of the Warrants.

         (b)  After the Distributing Dividend and Class C Exchange, and prior
    to the occurrence of the Exercise Condition with respect to a given Warrant
    (or fraction thereof), any Warrant Certificate issued to represent such
    Warrant (or fraction thereof) shall contain the following legend (the
    "Attachment Legend"):

         THE WARRANTS REPRESENTED BY THIS CERTIFICATE HAVE BEEN ATTACHED TO
         SHARES OF COMMON STOCK ("CLASS C STOCK") OF PKS HOLDINGS INC. ("PKS")
         REPRESENTED BY STOCK CERTIFICATE NO. ________.  THE WARRANTS
         REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO RESTRICTIONS ON
         EXERCISABILITY AND TRANSFER AS SET FORTH IN THE WARRANT AGREEMENT
         DATED AS OF __________, 1998 BETWEEN THE COMPANY AND _____________, AS
         WARRANT AGENT.  PRIOR TO THE OCCURRENCE OF THE RESTRICTED PERIOD
         TERMINATION DATE (AS DEFINED IN THE WARRANT AGREEMENT) WITH RESPECT TO
         EACH WARRANT REPRESENTED HEREBY, EXCEPT IN A TRANSFER TO THE COMPANY
         (OR DESIGNEE 


                                         -6-
<PAGE>

         THEREOF), SUCH WARRANTS MAY ONLY BE TRANSFERRED AS PROVIDED IN THE
         WARRANT AGREEMENT.

         Section 5.  EXECUTION OF WARRANT CERTIFICATES.  Warrant Certificates
shall be signed on behalf of the Company by its Chairman of the Board of
Directors, its Chief Executive Officer, its President, a Vice President or its
Treasurer and attested by its Secretary or Assistant Secretary, under its
corporate seal.  Each such signature upon the Warrant Certificates may be in the
form of a facsimile signature of the current or any future Chairman of the
Board, Chief Executive Officer, President, Vice President, Treasurer, Secretary
or Assistant Secretary and may be imprinted or otherwise reproduced on the
Warrant Certificates and for that purpose the Company may adopt and use the
facsimile signature of any person who shall have been Chairman of the Board,
Chief Executive Officer, President, Vice President, Treasurer, Secretary or
Assistant Secretary, notwithstanding the fact that at the time the Warrant
Certificates shall be countersigned and delivered or disposed of such person
shall have ceased to hold such office.  The seal of the Company may be in the
form of a facsimile thereof and may be impressed, affixed, imprinted or
otherwise reproduced on the Warrant Certificates.

         If any officer of the Company who shall have signed any of the Warrant
Certificates shall cease to be such officer before the Warrant Certificates so
signed shall have been countersigned by the Warrant Agent or disposed of by the
Company, such Warrant Certificates nevertheless may be countersigned and
delivered or disposed of as though such person had not ceased to be such officer
of the Company; and any Warrant Certificate may be signed on behalf of the
Company by any person who, at the actual date of the execution of such Warrant
Certificate, shall be a proper officer of the Company to sign such Warrant
Certificate, although at the date of the execution of this Agreement any such
person was not such officer.

         Section 6.  REGISTRATION AND COUNTERSIGNATURE.  Warrant Certificates
shall be manually countersigned and dated the date of countersignature by the
Warrant Agent and shall not be valid for any purpose unless so countersigned. 
The Warrant Certificates shall be numbered and shall be registered in a register
(the "Warrant Register") to be maintained by the Warrant Agent.


         The Warrant Agent's countersignature on all Warrant Certificates shall
be in substantially the form set forth in Exhibit A hereto.

         The Company and the Warrant Agent may deem and treat the registered
holder of a Warrant Certificate as the absolute owner thereof (notwithstanding
any notation of ownership or other writing thereon made by anyone), for the
purpose of any exercise 


                                         -7-
<PAGE>

or transfer thereof and for all other purposes, and neither the Company nor the
Warrant Agent shall be affected by any notice to the contrary.

         Section 7.  REGISTRATION OF TRANSFERS AND EXCHANGES

         (a)  No Warrant may be transferred prior to the Class C Exchange. 
    Following the Class C Exchange and prior to the occurrence of the
    Restricted Period Termination Date for a given Warrant (or fraction
    thereof), the Warrant Agent shall not register any transfer of the Warrant
    Certificate representing such Warrant (or fraction thereof), except an
    Attached Transfer or a Permitted Transfer.  Any transfer of a Warrant prior
    to such date, except an Attached Transfer or a Permitted Transfer, shall be
    void and of no effect.  For purposes of this Agreement, neither the Class C
    Exchange nor the attachment of Warrants (or fractions thereof) to New Class
    C Stock upon the occurrence of the Class C Exchange shall be considered a
    transfer of Warrants.

         Following the occurrence of the Class C Exchange and the Restricted
    Period Termination Date for a given Warrant, and until the Close of
    Business on the Expiration Date (as defined), the Warrant Agent shall from
    time to time register the transfer of the Warrant Certificate representing
    such Warrant in the Warrant Register, upon surrender of such Warrant
    Certificate, duly endorsed, with the assignment form on the reverse thereof
    duly completed and duly signed by the registered holder or holders thereof
    or by the duly appointed legal representative thereof or by a duly
    authorized attorney, such signature to be guaranteed by (a) a bank or trust
    company, (b) a broker or dealer that is a member of the NASD, (c) a member
    of a national securities exchange, (d) by an "eligible guarantor
    institution" as defined under Rule 17Ad-15 promulgated under the Exchange
    Act or (e) PKS (in the case of a transferor who is a holder of Class C
    Stock), and, if required by the terms of such assignment form, accompanied
    by a duly completed and executed PKS Certificate.

         In the event of an Attached Transfer or a Permitted Transfer of a
    Warrant following the Class C Exchange and prior to the Restricted Period
    Termination Date of such Warrant, the Warrant Agent shall register such
    Attached Transfer or Permitted Transfer of the Warrant Certificate
    representing such Warrant in the Warrant Register, upon surrender of such
    Warrant Certificate, duly endorsed, with the assignment form on the reverse
    thereof duly completed and duly signed by the registered holder or holders
    thereof or by the duly appointed legal representative thereof or by a duly
    authorized attorney, such signature to be guaranteed as provided in the
    preceding paragraph, and, if required by 


                                         -8-
<PAGE>

    the terms of such assignment form, accompanied by a duly completed and
    executed PKS Certificate.

         Upon any such registration of transfer, a new Warrant Certificate
    shall be issued to the transferee.


         (b)  Warrant Certificates may be exchanged at the option of the holder
    or holders thereof, when surrendered to the Warrant Agent at its offices or
    agency maintained in New York, New York (or at such other offices or
    agencies as may be designated by the Agent) for the purpose of exchanging,
    transferring and exercising Warrants (a "Warrant Agent Office"), or at the
    offices of any successor Warrant Agent as provided in Section 21 hereof,
    for another Warrant Certificate or other Warrant Certificates of like tenor
    and representing in the aggregate a like number of Warrants; provided,
    however, that prior to the Restricted Period Termination Date with respect
    to a given Warrant (or fraction thereof), the Warrant Certificate
    representing such Warrant may only be exchanged pursuant to this Section
    7(b) if both (i) such exchange is simultaneous with the exchange of the
    share certificate representing the share of Class C Stock to which such
    Warrant (or fraction thereof) is attached, and (ii) such Warrant
    Certificate is accompanied by a duly completed and executed PKS
    Certificate.

         (c)  The Warrant Agent is hereby authorized to countersign, in
    accordance with the provisions of Section 6 and of this Section 7, and
    deliver the new Warrant Certificates required pursuant to the provisions of
    this Section, and for the purpose of any distribution of Warrant
    Certificates contemplated by Section 13.

          Section 8.  DURATION; EXERCISE CONDITIONS 

          (a)  The Warrants shall expire at 5:00 p.m. New York City Time (the 
    "Close of Business") on (i) October 15, 1998 (or such later date as may 
    be determined by the Board of Directors of the Company), if the Class C 
    Exchange has not occurred on or prior to such date or (ii) April 15, 
    2010, if the Class C Exchange occurred on or prior to October 15, 1998 
    (or such date after October 15, 1998 as may be determined by the Board of 
    Directors of the Company) (such date of expiration being herein referred 
    to as the "Expiration Date").  After the Close of Business on the 
    Expiration Date, no Warrant may be exercised and the Warrants will be 
    void and of no value.  No Warrant may be exercised except as set forth in 
    paragraphs (b) and (c) below.

         (b)  In the event that the Common Stock is not Publicly Traded, each
    Warrant for which the Exercise Conditions have 


                                         -9-
<PAGE>

    been met may be exercised on any Business Day during any Private Exercise
    Period following December 31, 1999.

         (c)  In the event that the Common Stock is Publicly Traded, each 
    Warrant for which the Exercise Conditions have been met may be exercised 
    on any Business Day during any Public Exercise Period following such 
    period of at least 90 but less than 180 days after the date on which the 
    Common Stock first becomes Publicly Traded, as the Company may determine 
    if so requested by an underwriter of Common Stock in connection with an 
    initial public underwritten offering thereof.

         Section 9.  EXERCISE OF WARRANTS.

         (a)  Subject to the provisions of this Agreement, including Section 
    16, each Warrant shall entitle the holder thereof to purchase from the 
    Company (and the Company shall issue and sell to such holder of a 
    Warrant) one fully paid and nonassessable share of Common Stock at a 
    price equal to the Exercise Price then in effect, as adjusted pursuant to 
    Section 16 hereof.

         (b)  A Warrant may be exercised upon (i) surrender to the Warrant 
    Agent at a Warrant Agent Office of the Warrant Certificate evidencing 
    such Warrant, with the form of election to purchase on the reverse 
    thereof duly completed, and signed by the registered holder or holders 
    thereof or by the duly appointed legal representative thereof or by a 
    duly authorized attorney, such signature to be guaranteed by a bank or 
    trust company, by a broker or dealer which is a member of the NASD, by a 
    member of a national securities exchange or by PKS (in the case of a 
    holder who is a holder of Class C Stock), and, if required by the terms 
    of such form of election, accompanied by a PKS Certificate, and (ii) 
    payment to the Warrant Agent for the account of the Company, of the 
    Exercise Price in effect on the Exercise Date for the number of Shares in 
    respect of which such Warrants are being exercised.

         (c)  Such payment shall be made (i) in cash or by certified or official
    bank check payable to the order of the Company or by wire transfer of funds
    to an account designated by the Company for such purpose, (ii) without the
    payment of cash, by delivering share certificates, duly endorsed for
    transfer, representing such number of shares of Common Stock as shall equal
    (a) the amount of such payment divided by (b) the Trading Price used in
    calculating the Exercise Price in effect on the Exercise Date or (iii)
    without the payment of cash, by reducing the number of Shares that would be
    obtainable upon the exercise of a Warrant and payment of the Exercise Price
    in cash so as to yield a number of shares upon the exercise of such Warrant 


                                         -10-
<PAGE>

    equal to the product of (a) the number of Shares issuable as of the 
    Exercise Date upon the exercise of such Warrant (if payment of the 
    Exercise Price were being made in cash) and (b) the Cashless Exercise 
    Ratio.  An exercise of a Warrant in accordance with clause (ii) of the 
    preceding sentence is herein referred to as a "Share Exercise" and an 
    exercise of a Warrant in accordance with clause (iii) of such sentence is 
    herein referred to as a "Cashless Exercise."  Upon surrender of a Warrant 
    Certificate representing more or less than one Warrant in connection with 
    the holder's option to elect a Cashless Exercise, the number of shares of 
    Common Stock deliverable upon a Cashless Exercise shall be equal to the 
    number of shares of Common Stock issuable upon the exercise of Warrants 
    that the holder specifies are to be exercised pursuant to a Cashless 
    Exercise multiplied by the Cashless Exercise Ratio. All provisions of 
    this Agreement shall be applicable with respect to a surrender of a 
    Warrant Certificate pursuant to a Share Exercise or a Cashless Exercise 
    for less than the full number of Warrants represented thereby.

         (d)  Upon such surrender of a Warrant Certificate and payment of the 
    Exercise Price, the Warrant Agent shall requisition from the Transfer 
    Agent for issuance and delivery to or upon the written order of the 
    registered holder of such Warrant Certificate and in such name or names 
    as such registered holder may designate, a certificate or certificates 
    for the Share or Shares issuable upon the exercise of the Warrant or 
    Warrants evidenced by such Warrant Certificate.  Such certificate or 
    certificates shall be deemed to have been issued and any person so 
    designated to be named therein shall be deemed to have become the holder 
    of record of such Share or Shares as of the date of such surrender of 
    such Warrant Certificate duly executed and payment of the Exercise Price. 
     Subject to the terms of this Agreement, Warrants evidenced by a Warrant 
    Certificate shall be exercisable, at the election of the registered 
    holder thereof, either as an entirety or from time to time for a portion 
    of the number of Warrants specified in the Warrant Certificate.  If less 
    than all of the Warrants evidenced by a Warrant Certificate surrendered 
    upon the exercise of Warrants are exercised at any time prior to the 
    Expiration Date, a new Warrant Certificate or Certificates shall be 
    issued for the remaining number of Warrants evidenced by the Warrant 
    Certificate so surrendered, and the Warrant Agent is hereby authorized to 
    countersign the required new Warrant Certificate or Certificates pursuant 
    to the provisions of Section 8 and this Section 9.

         (e)  The Warrant Agent shall account promptly to the Company with 
    respect to Warrants exercised and concurrently pay or deliver to the 
    Company all moneys and other consideration received by it on the purchase 
    of Shares through the exercise of Warrants.

                                         -11-
<PAGE>

         Section 10.  DETERMINATION OF EXERCISE PRICE; OBLIGATION OF THE COMPANY
TO PROVIDE EXERCISE PRICE CERTIFICATES AND APPRAISALS

         (a)  The Exercise Price, Trading Price and Fixed Dollar Discount used
    for any purpose, including with respect to the exercise of a Warrant, shall
    be as set forth in the most recent Exercise Price Certificate, and shall in
    any case be as adjusted pursuant to Section 16 hereof.

         (b)  The "Exercise Price" for a Warrant set forth in each Exercise 
    Price Certificate shall be equal to (i) the Trading Price set forth in 
    such Exercise Price Certificate, minus (ii) the Fixed Dollar Discount 
    with respect to such Trading Price, subject to adjustment as set forth in 
    Section 16 hereof; provided, however, that in no event shall such 
    Exercise Price be less than $.01.

         (c)  If, at the end of any fiscal year of Company beginning with the 
    fiscal year ended December __, 1999, the Common Stock is not Publicly 
    Traded, the Company shall, no earlier than the January 15 nor later than 
    February 28 immediately following the end of such fiscal year, provide to 
    the Warrant Agent a certificate (the "Private Exercise Price 
    Certificate") in the form of Exhibit C hereto, signed by two officers of 
    the Company, setting forth the Exercise Price, Trading Price and Fixed 
    Dollar Discount as of the end of such fiscal year, calculated in each 
    case pursuant to this Section 10(c).  In addition, if a Change of Control 
    occurs when the Common Stock is not Publicly Traded, the Company shall 
    within ___ days following such Change of Control, provide to the Warrant 
    Agent a Private Exercise Price Certificate, signed by two officers of the 
    Company.

         The "Trading Price" set forth in such Private Exercise Price 
    Certificate shall be the Appraised Value set forth in the most recent 
    Appraisal (as defined) delivered to the Company and approved by the Board 
    of Directors.

         If, at the end of any fiscal year of the Company, beginning with the 
    fiscal year ended December __, 1999, the Common Stock is not Publicly 
    Traded, the Company shall cause to be prepared and delivered to the Board 
    of Directors, and approved by the Board of Directors, prior to the 
    February 28 immediately following the end of such fiscal year, an 
    appraisal (an "Appraisal") of the per share value of the Common Stock as 
    of the last day of such fiscal year by an Investment Bank selected by the 
    Board of Directors. If a Change of Control occurs when the Common Stock 
    is not Publicly Traded, the Company shall cause to be prepared and 
    delivered to the Board of Directors and approved by the Board of 
    Directors, within ____ days following such Change of Control, an 
    Appraisal of the per share value of the Common 


                                         -12-
<PAGE>

    Stock as of the date of such Change of Control.  Such Investment Bank shall
    determine the per share value of the Common Stock as if the Common Stock 
    was Publicly Traded and shall submit such per share value to the Board of 
    Directors for its approval.  The value per share of the Common Stock as set
    forth in the Appraisal and approved by the Board of Directors shall be the
    "Appraised Value."

         As promptly as practicable following its receipt of any Private 
    Exercise Period, the Warrant Agent shall cause to be given to each of the 
    registered holders of the Warrants at such holder's address appearing on 
    the Warrant Registrar a copy of such Private Exercise Price Certificate 
    by first class mail, postage prepaid.

         (d)  During any period in which the Common Stock is Publicly Traded, 
    the Company shall, on the last Business Day of each calendar month, 
    provide to the Warrant Agent a certificate (the "Public Exercise Price 
    Certificate") in the form of Exhibit D hereto, signed by two officers of 
    the Company, setting forth the Exercise Price, Trading Price and Fixed 
    Dollar Discount as of the Close of Business on such Business Day 
    calculated in each case pursuant to this Section 10(d).

         The "Trading Price" set forth in such Public Exercise Price 
    Certificate shall be equal to the Current Trading Value of one share of 
    Common Stock as of the Close of Business on the last Business Day of the 
    prior calendar month.  Notwithstanding anything herein to the contrary, 
    if, during any period being used to calculate such Current Trading Value 
    (the "Calculation Period"), any event has occurred to cause the number of 
    Shares issuable upon the exercise of any Warrant, the Exercise Price 
    and/or the Pricing Terms to be adjusted pursuant to Section 16 hereof (an 
    "Adjustment Event"), the Company shall in good faith determine such 
    Current Trading Value so as to give pro forma effect to the Adjustment 
    Event immediately prior to the Calculation Period.

         The Warrant Agent shall provide any registered holder of Warrants with
    a copy of any Public Exercise Price Certificate upon written request.

         (e)  All calculations and determinations required to be made by the
    Company pursuant to this Section 10 shall be made by the Company in good
    faith.  All such calculations and determinations shall be conclusive unless
    otherwise specifically provided hereby.

         Section 11.  CANCELLATION OF WARRANTS.  If the Company shall purchase 
or otherwise acquire Warrants, the Warrant Certificates representing such 
Warrants shall thereupon be 


                                         -13-
<PAGE>

delivered to the Warrant Agent and be canceled by it and retired.  The 
Warrant Agent shall cancel all Warrant Certificates surrendered for exchange, 
substitution, transfer or exercise in whole or in part.  Such canceled 
Warrant Certificates shall thereafter be disposed of in a manner satisfactory 
to the Company.

         Section 12.  PAYMENT OF TAXES.  The Company will pay all documentary 
stamp taxes attributable to the initial issuance of Warrants and of the 
Shares upon the exercise of Warrants; PROVIDED, that the Company shall not be 
required to pay any tax or taxes which may be payable in respect of any 
transfer involved in the issue of any Warrant Certificates or any 
certificates for Shares in a name other than the registered holder of a 
Warrant Certificate surrendered upon the exercise of a Warrant, and the 
Company shall not be required to issue or deliver such certificates unless or 
until the person or persons requesting the issuance thereof shall have paid 
to the Company the amount of such tax or shall have established to the 
satisfaction of the Company that such tax has been paid.

         Section 13.  MUTILATED OR MISSING WARRANT CERTIFICATES.  If any of 
the Warrant Certificates shall be mutilated, lost, stolen or destroyed, the 
Company may in its discretion issue, and the Warrant Agent shall countersign 
and deliver, in exchange and substitution for and upon cancellation of the 
mutilated Warrant Certificate, or in lieu of and substitution for the Warrant 
Certificate lost, stolen or destroyed, a new Warrant Certificate of like 
tenor and representing an equivalent number of Warrants, but only upon 
receipt of evidence satisfactory to the Company and the Warrant Agent of such 
loss, theft or destruction of such Warrant Certificate and indemnity or bond, 
if requested, also satisfactory to them. Applicants for such substitute 
Warrant Certificates shall also comply with such other reasonable regulations 
and pay such other reasonable charges as the Company or the Warrant Agent may 
prescribe.

         Section 14.  RESERVATION OF SHARES.  For the purpose of enabling it 
to satisfy any obligation to issue Shares upon exercise of Warrants, the 
Company shall at all times through the Close of Business on the Expiration 
Date, reserve and keep available, free from preemptive rights and out of its 
aggregate authorized but unissued or treasury shares of Common Stock, the 
number of Shares deliverable upon the exercise of all outstanding Warrants, 
and the Transfer Agent is hereby irrevocably authorized and directed at all 
times to reserve such number of authorized and unissued or treasury shares of 
Common Stock as shall be required for such purpose.  The Company will keep a 
copy of this Agreement on file with such Transfer Agent and with every 
transfer agent for any shares of the Company's capital stock issuable upon 
the exercise of Warrants pursuant to Section 16.  The Warrant Agent is hereby 
irrevocably authorized to requisition from time to time from such Transfer 
Agent stock certificates 


                                         -14-
<PAGE>

issuable upon exercise of outstanding Warrants, and the Company will supply 
such Transfer Agent with duly executed stock certificates for such purpose.

         Before taking any action that would cause an adjustment pursuant to 
Section 16 that would result in a reduction of the Exercise Price below the 
then par value (if any) of the Shares issuable upon exercise of the Warrants, 
the Company will take any corporate action that may, in the opinion of its 
counsel, be necessary in order that the Company may validly and legally issue 
fully paid and nonassessable Shares at the Exercise Price as so adjusted.

         The Company covenants that all Shares issued upon exercise of the 
Warrants will, upon issuance in accordance with the terms of this Agreement, 
be fully paid and nonassessable and free from all taxes, liens, charges and 
security interests created by or imposed upon the Company with respect to the 
issuance and holding thereof.

         Section 15.  OBTAINING OF GOVERNMENTAL APPROVALS AND STOCK EXCHANGE 
LISTINGS; PROSPECTUS DELIVERY.  So long as any Warrants remain outstanding, 
the Company will take all necessary action (a) to obtain and keep effective 
any and all permits, consents and approvals of governmental agencies and 
authorities and to make filings under federal and state securities acts and 
laws, which may be or become requisite in connection with the issuance, sale, 
transfer and delivery of the Warrant Certificates, the exercise of the 
Warrants and the issuance, sale, transfer and delivery of the Shares issued 
upon exercise of Warrants, and (b) if the Common Stock is Publicly Traded, to 
have the Shares, immediately upon their issuance upon exercise of Warrants, 
listed on each national securities exchange, the Nasdaq National Market or 
the Nasdaq SmallCap Market on which the Common Stock is then listed or 
traded.  So long as any unexpired Warrants remain outstanding and if required 
in order to comply with the Securities Act or state securities laws, the 
Company agrees that it will file such post-effective amendments to the 
registration statement filed pursuant to the Securities Act with respect to 
the Warrants (or such other registration statements or post-effective 
amendments or supplements) as may be necessary to permit the Company to 
deliver to each person exercising a Warrant a prospectus meeting the 
requirements of Section 10(a)(3) of the Securities Act and otherwise 
complying therewith, and, if required in order to comply with the Securities 
Act or state securities laws, will deliver such a prospectus to each such 
person.

         Section 16.  ADJUSTMENT OF PRICING TERMS AND NUMBER OF SHARES 
PURCHASABLE OR NUMBER OF WARRANTS.  The Pricing Terms, the number of Shares 
purchasable upon the exercise of each Warrant and the number of Warrants 
outstanding are subject to adjustment from time to time upon the occurrence 
of the events enumerated in 


                                         -15-
<PAGE>

this Section 16; PROVIDED, HOWEVER, that no such adjustments shall be made as 
a result of the Distributing Dividend or the Class C Exchange.

         (a)  If the Company shall (i) pay a dividend on any of its shares of 
    capital stock (including Common Stock) in shares of Common Stock, (ii) 
    subdivide its outstanding shares of Common Stock, (iii) combine its 
    outstanding shares of Common Stock into a smaller number of shares of 
    Common Stock or (iv) issue any shares of its capital stock in a 
    reclassification of the Common Stock (including any such reclassification 
    in connection with a consolidation or merger in which the Company is the 
    continuing corporation), the number of Shares purchasable upon exercise 
    of each Warrant immediately prior thereto shall be adjusted so that the 
    holder of each Warrant shall be entitled upon exercise to receive the 
    kind and number of Shares or other securities of the Company which such 
    holder would have owned or have been entitled to receive after the 
    happening of any of the events described above, had such Warrant been 
    exercised immediately prior to the happening of such event or any record 
    date with respect thereto.  An adjustment made pursuant to this paragraph 
    (a) shall become effective immediately after the effective date of such 
    event retroactive to the record date, if any, for such event.

         (b)  If the Company shall issue rights, options or warrants to all 
    holders of its outstanding Common Stock (other than pursuant to the 
    Rights Agreement dated _________, 1997 between the Company and 
    ____________________, as Rights Agent, or any successor or similar 
    agreement), without payment of additional consideration by such holders, 
    entitling them (for a period expiring within 45 days after the record 
    date mentioned below) to subscribe for or purchase shares of Common Stock 
    at a price per share that is lower than the Trading Price as set forth in 
    the last Exercise Price Certificate delivered to, or prepared by, the 
    Warrant Agent prior to the record date mentioned below, the number of 
    Shares thereafter purchasable upon the exercise of each Warrant shall be 
    determined by multiplying the number of Shares theretofore purchasable 
    upon exercise of each Warrant by a fraction, of which (i) the numerator 
    shall be the number of [shares of Common Stock outstanding] on the date 
    of issuance of such rights, options or warrants plus the number of 
    additional shares of Common Stock offered for subscription or purchase, 
    and (ii) the denominator shall be the number of shares of Common Stock 
    outstanding on the date of issuance of such rights, options or warrants 
    plus the number of shares which the aggregate offering price of the total 
    number of shares of Common Stock so offered would purchase at the price 
    per share of Common Stock equal to the Trading Price as set forth in the 
    last Exercise Price Certificate delivered to, 


                                         -16-
<PAGE>

    or prepared by, the Warrant Agent prior to such record date.  Such 
    adjustment shall be made whenever such rights, options or warrants are 
    issued, and shall become effective immediately on the date of issuance 
    retroactive to the record date for the determination of stockholders 
    entitled to receive such rights, options or warrants.

         (c)  If the Company shall distribute to all holders of its shares of 
    Common Stock evidences of its indebtedness or assets (excluding dividends 
    or distributions referred to in paragraph (a) above) or rights, options 
    or warrants or convertible or exchangeable securities containing the 
    right to subscribe for or purchase shares of Common Stock (excluding 
    those referred to in paragraph (b) above), then in each case the number 
    of Shares thereafter purchasable upon the exercise of each Warrant shall 
    be determined by multiplying the number of Shares theretofore purchasable 
    upon the exercise of each Warrant, by a fraction, of which the numerator 
    shall be (i) the Trading Price as set forth in the last Exercise Price 
    Certificate delivered to, or prepared by, the Warrant Agent prior to such 
    distribution, and of which the denominator shall be (ii) such Trading 
    Price, less the then fair value (as determined in good faith by the Board 
    of Directors of the Company, whose determination shall be conclusive and 
    shall be evidenced by a resolution filed with the Warrant Agent) of the 
    portion of the assets or evidences of indebtedness so distributed or of 
    such subscription rights, options or warrants or convertible or 
    exchangeable securities applicable to one share of Common Stock.  Such 
    adjustment shall be made whenever any such distribution is made, and 
    shall become effective on the date of distribution retroactive to the 
    record date for the determination of stockholders entitled to receive 
    such distribution.

         (d)  In the event of any capital reorganization or any 
    reclassification of the Common Stock (except as provided in paragraphs 
    (a) through (c) above or paragraph (l) below), any holder of Warrants 
    upon exercise thereof shall be entitled to receive, in lieu of the Common 
    Stock to which such holder would have become entitled upon exercise 
    immediately prior to such reorganization or reclassification, the shares 
    (of any class or classes) or other securities or property of the Company 
    that such holder would have been entitled to receive at the same 
    aggregate Exercise Price (as in effect immediately prior to such 
    reorganization or reclassification) upon such reorganization or 
    reclassification if such holder's Warrants had been exercised immediately 
    prior thereto; and in any such case, appropriate provision (as determined 
    in good faith by the Board of Directors of the Company, whose 
    determination shall be conclusive and shall be evidenced by a resolution 
    filed with the Warrant Agent) shall be made for the application of this 
    Section 16 with respect to the rights and interests 


                                         -17-
<PAGE>

    thereafter of the holders of Warrants (including the allocation of the 
    adjusted Exercise Price (and the components thereof) between or among 
    shares of classes of capital stock), to the end that this Section 16 
    (including the adjustments of the number of shares of Common Stock or 
    other securities purchasable and the Exercise Price thereof) shall 
    thereafter be reflected, as nearly as reasonably practicable, in all 
    subsequent exercises of Warrants for any shares or securities or other 
    property thereafter deliverable upon the exercise of Warrants.

         (e)  For the purposes of adjustments required by paragraphs (b) and 
    (c) of this Section 16, the shares of Common Stock the holder of any 
    rights, options, warrants or convertible or exchangeable securities shall 
    be entitled to subscribe for or purchase shall be deemed to be issued and 
    outstanding as of the date of sale, issuance or distribution of such 
    securities and the consideration, if any, received by the Company 
    therefor shall be deemed to be the consideration received by the Company 
    for such securities, plus the consideration or premiums stated in such 
    security to be paid for the shares of Common Stock covered thereby.

         (f)  Except for adjustments required by paragraph (l) hereof, no 
    adjustment in the number of Shares purchasable hereunder shall be 
    required unless such adjustment would require an increase or decrease of 
    at least one percent (1%) in the number of Shares purchasable upon the 
    exercise of each Warrant; provided, however, that any adjustments which 
    by reason of this paragraph (f) are not required to be made shall be 
    carried forward and taken into account in any subsequent adjustment.  All 
    calculations shall be made to the nearest cent and to the nearest 
    one-hundredth of a share, as the case may be.

         (g)  Whenever the number of Shares purchasable upon the exercise of 
    each Warrant is adjusted as herein provided (whether or not the Company 
    then or thereafter elects to issue additional Warrants in substitution 
    for an adjustment in the number of Shares as provided in paragraph (j)), 
    (i) the Exercise Price, as in effect on the date such adjustment to the 
    number of Shares purchasable upon exercise of the Warrants is made, shall 
    be adjusted by multiplying the Exercise Price immediately prior to such 
    adjustment by a fraction (the "Adjustment Fraction"), of which the 
    numerator shall be the number of Shares purchasable upon the exercise of 
    each Warrant immediately prior to such adjustment, and of which the 
    denominator shall be the number of Shares so purchasable immediately 
    thereafter; and (ii) the Pricing Terms used in all calculations of the 
    Exercise Price set forth in Exercise Price Certificates delivered 
    subsequent to such date of adjustment shall be adjusted by multiplying 
    each such Pricing Term in effect immediately prior to such adjustment by 
    the Adjustment Fraction.


                                         -18-
<PAGE>

         (h)  For the purpose of this Section 16, the term "shares of Common 
    Stock" shall mean (i) the class of stock designated as the Common Stock 
    of the Company at the date of this Agreement, or (ii) any other class of 
    stock resulting from successive changes or reclassification of such 
    shares consisting solely of changes in par value, or from par value to no 
    par value, or from no par value to par value.  If at any time, as a 
    result of an adjustment made pursuant to paragraph (a) or (d) above, the 
    holders of Warrants shall become entitled to purchase any shares of the 
    Company other than shares of Common Stock, thereafter the number of such 
    other shares so purchasable upon exercise of each Warrant and the 
    Exercise Price of such shares shall be subject to adjustment from time to 
    time in a manner and on terms as nearly equivalent as practicable to the 
    provisions with respect to the Shares contained in paragraphs (a) through 
    (g), inclusive, above, and the provisions of Sections 7, 9, 10, 12, 14 
    and 17, with respect to the Shares, shall apply on like terms to any such 
    other shares.

         (i)  Upon the expiration of any rights, options, warrants or 
    conversion or exchange privileges, if any thereof shall not have been 
    exercised, the Exercise Price and the number of shares of Common Stock 
    purchasable upon the exercise of each Warrant shall, upon such 
    expiration, be readjusted and shall thereafter be such as it would have 
    been had it been originally adjusted (or had the original adjustment not 
    been required, as the case may be) as if (i) the only shares of Common 
    Stock so issued were the shares of Common Stock, if any, actually issued 
    or sold upon the exercise of such rights, options, warrants or conversion 
    or exchange rights and (ii) such shares of Common Stock, if any, were 
    issued or sold for the consideration actually received by the Company 
    upon such exercise plus the aggregate consideration, if any, actually 
    received by the Company for the issuance, sale or grant of all of such 
    rights, options, warrants or conversion or exchange rights whether or not 
    exercised; provided, that no such readjustment shall have the effect of 
    increasing the Exercise Price or decreasing the number of shares by an 
    amount in excess of the amount of the readjustment initially made in 
    respect to the issuance, sale or grant of such rights, options, warrants 
    or conversion or exchange rights.

         (j)  The Company may elect, on or after the date of any adjustment 
    required by paragraphs (a) through (d) of this Section 16, to adjust the 
    number of Warrants in substitution for an adjustment in the number of 
    Shares purchasable upon the exercise of a Warrant.  Each of the Warrants 
    outstanding after such adjustment of the number of Warrants shall be 
    exercisable for the same number of Shares as immediately prior to such 
    adjustment.  Each Warrant held of record prior to such adjustment of the 
    number of Warrants shall become that number of Warrants (calculated to 
    the nearest 


                                         -19-
<PAGE>

    hundredth) obtained by dividing the Exercise Price in effect prior to 
    adjustment of the Exercise Price by the Exercise Price in effect after 
    adjustment of the Exercise Price.  The Company shall notify the holders 
    of Warrants in the same manner as provided in the first paragraph of 
    Section 18, of its election to adjust the number of Warrants, indicating 
    the record date for the adjustment, and, if known at the time, the amount 
    of the adjustment to be made.  This record date may be the date on which 
    the Exercise Price is adjusted or any day thereafter.  Upon each 
    adjustment of the number of Warrants pursuant to this paragraph (k) the 
    Company shall, as promptly as practicable, cause to be distributed to 
    holders of record of Warrants on such record date Warrant Certificates 
    evidencing, subject to Section 17, the additional Warrants to which such 
    holders shall be entitled as a result of such adjustment, or, at the 
    option of the Company, shall cause to be distributed to such holders of 
    record in substitution and replacement for the Warrant Certificates held 
    by such holders prior to the date of adjustment, and upon surrender 
    thereof, if required by the Company, new Warrant Certificates evidencing 
    all the Warrants to be issued, executed and registered in the manner 
    specified in Sections 6 and 7 (and which may bear, at the option of the 
    Company, the adjusted Exercise Price) and shall be registered in the 
    names of the holders of record of Warrant Certificates on the record date 
    specified in the notice.

         (k)  Except as provided in paragraphs (a), (b) and (c) of this Section
    16, no adjustment in respect of any dividends shall be made during the term
    of a Warrant or upon the exercise of a Warrant.

         (l)  In case of any consolidation of the Company with or merger of 
    the Company into another corporation or in case of any sale or conveyance 
    to another corporation of the property of the Company as an entirety or 
    substantially as an entirety, the Company or such successor or purchasing 
    corporation, as the case may be, shall execute with the Warrant Agent an 
    agreement that each holder of a Warrant shall have the right thereafter 
    upon payment of the Exercise Price in effect immediately prior to such 
    action to purchase upon exercise of each Warrant the kind and amount of 
    shares and other securities and property which such holder would have 
    owned or have been entitled to receive after the happening of such 
    consolidation, merger, sale or conveyance had such Warrant been exercised 
    immediately prior to such action.  The Company shall mail by first-class 
    mail, postage prepaid, to each registered holder of a Warrant, notice of 
    the execution of any such agreement.  Such agreement shall provide for 
    adjustments, which shall be as nearly equivalent as may be practicable to 
    the adjustments provided for in this Section 16.  The provisions of this 
    paragraph (l) shall similarly apply to successive consolidations, 
    mergers, sales 


                                         -20-
<PAGE>

    or conveyances.  The Warrant Agent shall be under no duty or 
    responsibility to determine the correctness of any provisions contained 
    in any such agreement relating either to the kind or amount of shares of 
    stock or other securities or property receivable upon exercise of 
    Warrants or with respect to the method employed and provided therein for 
    any adjustments and shall be entitled to rely upon the provisions 
    contained in any such agreement.

         (m)  Irrespective of any adjustments in the Exercise Price or the 
    number or kind of shares purchasable upon the exercise of Warrants, 
    Warrant Certificates theretofore or thereafter issued may continue to 
    express the same price and number and kind of shares as are stated in the 
    Warrant Certificates initially issuable pursuant to this Agreement.

         Section 17.  FRACTIONAL WARRANTS AND FRACTIONAL SHARES.

         (a)  The Company may issue fractions of Warrants.

         (b)  Notwithstanding an exercise of a fractional Warrant or any 
    adjustment pursuant to Section 16 in the number of Shares purchasable 
    upon the exercise of a Warrant, the Company shall not be required to 
    issue fractions of Shares upon exercise of Warrants or to distribute 
    certificates which evidence fractional Shares.  In lieu of any fractional 
    Share for which Warrants are exercised, there shall be paid to the 
    registered holder of the related Warrant Certificate an amount in cash 
    equal to the Trading Price then in effect multiplied by the fraction 
    represented by such fractional Share.

         Section 18.  NOTICES TO HOLDERS.  Upon any adjustment pursuant to 
Section 16, the Company within 20 calendar days thereafter shall (i) cause to 
be filed with the Warrant Agent a certificate of a firm of independent public 
accountants of recognized standing selected by the Company (who may be the 
regular auditors of the Company) setting forth the Exercise Price, Pricing 
Terms and either the number of Shares purchasable upon exercise of a Warrant 
or the additional number of Warrants to be issued for each previously 
outstanding Warrant, as the case may be, after such adjustment and setting 
forth in reasonable detail the method of calculation and the facts upon which 
such adjustment was made, which certificate shall be conclusive evidence of 
the correctness of the matters set forth therein, and (ii) cause to be given 
to each of the registered holders of the Warrant Certificates at such 
holder's address appearing on the Warrant Register written notice of such 
adjustments by first-class mail, postage prepaid.  Where appropriate, such 
notice may be given in advance and included as a part of the notice required 
to be mailed under the other provisions of this Section 18.


                                         -21-
<PAGE>

If:

         (a)  the Company shall declare any dividend payable in any securities
    upon its shares of Common Stock or make any distribution (other than a cash
    dividend) to the holders of its shares of Common Stock;

         (b)  the Company shall offer to the holders of its shares of Common
    Stock any additional shares of Common Stock or securities convertible into
    shares of Common Stock or any right to subscribe thereto;

         (c)  there shall be a dissolution, liquidation or winding up of the
    Company (other than in connection with a transaction described in Section
    16(l)); or

         (d)  a Change of Control has occurred;

then the Company shall (i) cause written notice of such event to be filed 
with the Warrant Agent and shall cause written notice of such event to be 
given to each of the registered holders of the Warrant Certificates at such 
holder's address appearing on the Warrant Register, by first-class mail, 
postage prepaid, and (ii) make a public announcement in a daily newspaper of 
general circulation in New York City and a daily newspaper of general 
circulation in Omaha, Nebraska of such event, such giving of notice and 
publication to be completed (x) in the case of clause (a) or (b) above, at 
least 10 calendar days prior to the date fixed as a record date or the date 
of closing the transfer books for the determination of the stockholders 
entitled to such dividend, distribution or subscription rights, (y) in the 
case of clause (c) above, 20 calendar days prior to the date fixed as a 
record date or the date of closing the transfer books for the determination 
of stockholders entitled to vote on such proposed dissolution, liquidation or 
winding up, or (z) in the case of clause (d) above, five calendar days after 
such Change of Control.  Such notice shall specify such record date, the date 
of closing the transfer books or the date of the Change of Control, as the 
case may be.  The failure to give the notice required by this Section 18 or 
any defect therein shall not affect the legality or validity of any 
distribution, right, warrant, dissolution, liquidation or winding up or the 
vote upon or any other action taken in connection therewith.

         Section 19.  MERGER, CONSOLIDATION OR CHANGE OF NAME OF WARRANT 
AGENT. Any corporation into which the Warrant Agent may be merged or 
converted or with which it may be consolidated, or any corporation resulting 
from any merger, conversion or consolidation to which the Warrant Agent shall 
be a party, or any corporation succeeding to the shareholder services 
business of the Warrant Agent, shall be the successor to the Warrant Agent 
hereunder without the execution or filing of any paper or my further act on 
the part of any of the parties hereto, provided 


                                         -22-
<PAGE>

that such corporation would be eligible for appointment as a successor 
Warrant Agent under the provisions of Section 21.  If at the time such 
successor to the Warrant Agent shall succeed under this Agreement, any of the 
Warrant Certificates shall have been countersigned but not delivered, any 
such successor to the Warrant Agent may adopt the countersignature of the 
original Warrant Agent; and if at that time any of the Warrant Certificates 
shall not have been countersigned, any successor to the Warrant Agent may 
countersign such Warrant Certificates either in the name of the predecessor 
Warrant Agent or in the name of the successor Warrant Agent; and in all such 
cases such Warrant Certificates shall have the full force provided in the 
Warrant Certificates and in this Agreement.

         If at any time the name of the Warrant Agent shall be changed and at 
such time any of the Warrant Certificates shall have been countersigned but 
not delivered, the Warrant Agent whose name has changed may adopt the 
countersignature under its prior name; and if at that time any of the Warrant 
Certificates shall not have been countersigned, the Warrant Agent may 
countersign such Warrant Certificates either in its prior name or in its 
changed name; and in all such cases such Warrant Certificates shall have the 
full force provided in the Warrant Certificates and in this Agreement.

         Section 20.  WARRANT AGENT.  The Company may appoint itself or any 
affiliate of the Company as Warrant Agent.  In the event that the Company is 
not the Warrant Agent, the Warrant Agent undertakes the duties and 
obligations imposed by this Agreement upon the following terms and 
conditions, by all of which the Company and the holders of Warrants, by their 
acceptance thereof, shall be bound:

         (a)  The statements contained herein and in the Warrant Certificates
    shall be taken as statements of the Company, and the Warrant Agent assumes
    no responsibility for the certificates of any of the same except such as
    describe the Warrant Agent or action taken or to be taken by it.  Except as
    herein otherwise provided, the Warrant Agent assumes no responsibility with
    respect to the execution, delivery or distribution of the Warrant
    Certificates.

         (b)  The Warrant Agent shall not be responsible for any failure of the
    Company to comply with any of the covenants contained in this Agreement or
    in the Warrant Certificates to be complied with by the Company nor shall it
    at any time be under any duty or responsibility to any holder of a Warrant
    to make or cause to be made any adjustment in the Exercise Price, Pricing
    Terms or in the number of Shares issuable upon exercise of any Warrant
    (except as instructed by the Company), or to determine whether any facts
    exist which may require any such adjustments, or with respect to 


                                         -23-
<PAGE>

    the nature or extent of or method employed in making any such adjustments
    when made.

         (c)  The Warrant Agent may consult at any time with counsel
    satisfactory to it (who may be counsel for the Company) and the Warrant
    Agent shall incur no liability or responsibility to the Company or any
    holder of any Warrant Certificate in respect of any action taken, suffered
    or omitted by it hereunder in good faith and in accordance with the opinion 
    or the advice of such counsel.

         (d)  The Warrant Agent shall incur no liability or responsibility to
    the Company or to any holder of any Warrant Certificate for any action
    taken in reliance on any notice, resolution, waiver, consent, order,
    certificate or other paper, document or instrument reasonably believed by
    it to be genuine and to have been signed, sent or presented by the proper
    party or parties.

         (e)  The Company agrees to indemnify the Warrant Agent and save it
    harmless against any and all losses, liabilities and expenses, including
    judgments, costs and reasonable counsel fees and expenses, for anything
    done or omitted by the Warrant Agent arising out of or in connection with
    this Agreement except as a result of its negligence or bad faith.

         (f)  The Warrant Agent shall be under no obligation to institute any
    action, suit or legal proceeding or to take any other action likely to
    involve expense unless the Company or one or more registered holders of
    Warrant Certificates shall furnish the Warrant Agent with reasonable
    security and indemnity for any costs or expenses which may be incurred. 
    All rights of action under this Agreement or under any of the Warrants may
    be enforced by the Warrant Agent without the possession of any of the
    Warrant Certificates or the production thereof at any trial or other
    proceeding relative thereto, and any such action, suit or proceeding
    instituted by the Warrant Agent shall be brought in its name as Warrant
    Agent, and any recovery or judgment shall be for the ratable benefit of the
    registered holders of the Warrants, as their respective rights or interests
    may appear.

         (g)  The Warrant Agent, and any stockholder, director, officer or
    employee thereof, may buy, sell or deal in any of the Warrants or other
    securities of the Company or become pecuniarily interested in any
    transaction in which the Company may be interested, or contract with or
    lend money to the Company or otherwise act as fully and freely as though
    they were not the Warrant Agent under this Agreement, or a stockholder
    director, officer or employee of the Warrant Agent, as the case may be. 
    Nothing herein shall be preclude the Warrant Agent from acting in any other
    capacity for the Company or for any other legal entity.


                                         -24-
<PAGE>

         (h)  The Warrant Agent shall act hereunder solely as agent for the
    Company, and its duties shall be determined solely by the provisions
    hereof.  The Warrant Agent shall not be liable for anything which it may do
    or refrain from doing in connection with this Agreement except for its own
    negligence or bad faith.

         (i)  The Company agrees that it will perform, execute, acknowledge and
    deliver or cause to be performed, executed, acknowledged and delivered all
    such further and other acts, instruments and assurances as may reasonably
    be required by the Warrant Agent for the carrying out or performing of the
    provisions of this Agreement.

         (j)  The Warrant Agent shall not be under any responsibility in
    respect of the validity of this Agreement or the execution and delivery
    hereof (except the due execution hereof by the Warrant Agent) or in respect
    of the validity or execution of any Warrant Certificate (except its
    countersignature thereof), nor shall the Warrant Agent by any act hereunder
    be deemed to make any representation or warranty as to the authorization or
    reservation of the Shares to be issued pursuant to this Agreement or any
    Warrant Certificate or as to whether the Shares will when issued be validly
    issued, fully paid and nonassessable or as to the Exercise Price or the
    number of Shares issuable upon exercise of any Warrant.

         (k)  The Warrant Agent is hereby authorized and directed to accept
    instructions with respect to the performance of its duties hereunder from
    the Chairman of the Board, the Chief Executive Officer, the President, any
    Vice President, the Treasurer, the Secretary or an Assistant Secretary of
    the Company, and to apply to such officers for advice or instructions in
    connection with its duties, and shall not be liable for any action
    reasonably taken or suffered to be taken by it in good faith in accordance
    with instructions of any such officer or in good faith reliance upon any
    statement signed by any one of such officers of the Company with respect to
    any fact or matter (unless other evidence in respect thereof is herein
    specifically prescribed) which may be deemed to be conclusively proved and
    established by such signed statement.

         Section 21.  CHANGE OF WARRANT AGENT.  If the Warrant Agent shall
resign (such resignation to become effective not earlier than 60 days after the
giving of written notice thereof to the Company and the registered holders of
Warrant Certificates) or shall become incapable of acting as Warrant Agent or if
the Board of Directors of the Company shall by resolution remove the Warrant
Agent (such removal to become effective not earlier than 30 days after the
filing of a certified copy of such resolution with the Warrant Agent and the 


                                         -25-
<PAGE>

giving of written notice of such removal to the registered holders of Warrant
Certificates), the Company shall appoint a successor to the Warrant Agent.  If
the Company shall fail to make such appointment within a period of 30 days after
such removal or after it has been so notified in writing of such resignation or
incapacity by the Warrant Agent or by the registered holder of a Warrant
Certificate (in the case of incapacity), then the registered holder of any
Warrant Certificate may apply to any court of competent jurisdiction for the
appointment of a successor to the Warrant Agent.  Pending appointment of a
successor to the Warrant Agent, either by the Company or by such a court, the
duties of the Warrant Agent shall be carried out by the Company.  Any successor
Warrant Agent, whether appointed by the Company or by such a court, shall be a
bank or trust company, in good standing, incorporated under the laws of any
state or of the United States of America.  As soon as practicable after
appointment of the successor Warrant Agent, the Company shall cause written
notice of the change in the Warrant Agent to be given to each of the registered
holders of the Warrant Certificates at such holder's address appearing on the
Warrant Register.  After appointment, the successor Warrant Agent shall be
vested with the same powers, rights, duties and responsibilities as if it had
been originally named as Warrant Agent without further act or deed.  The former
Warrant Agent shall deliver and transfer to the successor Warrant Agent any
property at the time held by it hereunder and execute and deliver, at the
expense of the Company, any further assurance, conveyance, act or deed necessary
for the purpose.  Failure to give any notice provided for in this Section 21 or
any defect therein, shall not affect the legality or validity of the removal of
the Warrant Agent or the appointment of a successor Warrant Agent, as the case
may be.

         Section 22.  HOLDER NOT DEEMED A STOCKHOLDER.  Nothing contained in
this Agreement or in any of the Warrant Certificates shall be construed as
conferring upon the holders thereof the right to vote or to receive dividends or
to consent or to receive notice as stockholders in respect of the meetings of
stockholders or for the election of directors of the Company or any other
matter, or any rights whatsoever as stockholders of the Company.

         Section 23.  DELIVERY OF PROSPECTUS.  If the Company is required under
applicable federal or state securities laws to deliver a prospectus upon
exercise of Warrants, the Company will furnish to the Warrant Agent sufficient
copies of a prospectus, and the Warrant Agent agrees that upon the exercise of
any Warrant Certificate by the holder thereof, the Warrant Agent will deliver to
such holder, prior to or concurrently with the delivery of the certificate or
certificates for the Shares issued upon such exercise, a copy of the prospectus.

         Section 24.  NOTICES TO COMPANY AND WARRANT AGENT.  Any notice or
demand authorized by this Agreement to be given or made 




                                         -26-
<PAGE>

by the Warrant Agent or by any registered holder of any Warrant Certificate 
to or on the Company shall be sufficiently given or made if sent by mail, 
first-class or registered, postage prepaid, addressed (until another address 
is filed in writing by the Company with the Warrant Agent), as follows:

                        [Peter Kiewit Sons', Inc.]
                        _________________________
                        _________________________
                        Omaha, NE  __________
                        Attention:  Corporate Secretary

         If the Company shall fail to maintain such office or agency or shall 
fail to give such notice of any change in the location thereof, presentation 
may be made and notices and demands may be served at the principal office of 
the Warrant Agent.

         Any notice pursuant to this Agreement to be given by the Company or 
by any registered holder of any Warrant Certificate to the Warrant Agent 
shall be sufficiently given if sent by first-class mail, postage prepaid, 
addressed (until another address is filed in writing by the Warrant Agent 
with the Company), as follows:

                        [to come]

         The Warrant Agent maintains a Warrant Agent Office at
______________________________.

         Section 25.  SUPPLEMENTS AND AMENDMENTS.

         (a)  The Company and the Warrant Agent may from time to time amend or
    supplement this Agreement or any Exercise Price Certificate without the
    approval of any holders of Warrant Certificates in order to cure any
    ambiguity, manifest error or other mistake in this Agreement or any
    Exercise Price Certificate, or to correct or supplement any provision
    contained herein that may be defective or inconsistent with any other
    provision herein, or to make any other provisions in regard to matters or
    questions arising hereunder that the Company and the Warrant Agent may deem
    necessary or desirable and that shall not adversely affect, alter or change
    the interests of the holders of the Warrants.

         (b)  In addition to the forgoing and except as set forth in paragraph
    (c) hereof, the Company and the Warrant Agent may amend or supplement this
    Agreement with the consent of the holders of at least two-thirds of the
    Warrants then outstanding (including, without limitation, consents obtained
    in connection with a tender offer or 


                                         -27-
<PAGE>

    exchange offer for the Warrants, but excluding all Warrants held by the
    Company or an Affiliate thereof).

         (c)  Except as set forth in paragraph (a) above, without the consent
    of the holder of each Warrant then outstanding, the Company and the Warrant
    Agent may not amend or supplement this Agreement to (i) reduce the number
    of Warrants whose holders must consent to an amendment or supplement, (ii)
    reduce the number of shares to which a holder is entitled upon exercise of
    a Warrant, (iii) increase the Exercise Price a holder is required to pay to
    exercise a Warrant, (iv) make any changes in this Section 25.

         Section 26.  SUCCESSORS.  All the covenants and provisions of this 
Agreement by or for the benefit of the Company or the Warrant Agent shall 
bind and inure to the benefit of their respective successors and assigns 
hereunder.

         Section 27.  TERMINATION.  This Agreement shall terminate at the 
Close of Business on the Expiration Date.  Notwithstanding the foregoing, 
this Agreement will terminate on any earlier date when all Warrants have been 
exercised.  The provisions of Section 20 shall survive such termination.

         Section 28.  GOVERNING LAW.  This Agreement and each Warrant 
Certificate issued hereunder shall be deemed to be a contract made under the 
laws of the State of Delaware and for all purposes shall be construed in 
accordance with the laws of such State.

         Section 29.  BENEFITS OF THIS AGREEMENT.  Nothing in this Agreement 
shall be construed to give to any person or corporation other than the 
Company, the Warrant Agent and the registered holders of the Warrant 
Certificates any legal or equitable right, remedy or claim under this 
Agreement, and this Agreement shall be for the sole and exclusive benefit of 
the Company, the Warrant Agent and the registered holders of the Warrant 
Certificates.

         Section 30.  COUNTERPARTS.  This Agreement may be executed in any 
number of counterparts and each of such counterparts shall for all purposes 
be deemed to be an original, and such counterparts shall together constitute 
but one and the same instrument.

         Section 31.  HEADINGS.  The headings of sections of this Agreement 
have been inserted for convenience of reference only, are not to be 
considered a part hereof and in no way modify or restrict any of the terms or 
provisions hereof.


                                         -28-
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Warrant
Agreement to be executed and delivered as of the day and year first above
written.

                                  PETER KIEWIT SONS', INC.


                                  By:  
                                     ------------------------------
                                      Name:
                                      Title:

ATTEST:

________________________               [WARRANT AGENT]

By:      
   -----------------------
    Name:
    Title:


ATTEST:

________________________




                                         -29-

<PAGE>

                                                                      SCHEDULE I


                                   INVESTMENT BANKS

[To come]






















                                         I-1
<PAGE>

                                                                       EXHIBIT A

                        [FORM OF FACE OF WARRANT CERTIFICATE]

[THE WARRANTS REPRESENTED BY THIS CERTIFICATE HAVE BEEN ATTACHED TO SHARES OF
COMMON STOCK ("CLASS C STOCK") OF PKS HOLDINGS INC. ("PKS") REPRESENTED BY STOCK
CERTIFICATE NO. ________.  THE WARRANTS REPRESENTED BY THIS CERTIFICATE ARE
SUBJECT TO RESTRICTIONS ON EXERCISABILITY AND TRANSFER AS SET FORTH IN THE
WARRANT AGREEMENT DATED AS OF __________, 1998 BETWEEN THE COMPANY AND
_____________, AS WARRANT AGENT.  PRIOR TO THE OCCURRENCE OF THE RESTRICTED
PERIOD TERMINATION DATE (AS DEFINED IN THE WARRANT AGREEMENT) WITH RESPECT TO
EACH WARRANT REPRESENTED HEREBY, EXCEPT IN A TRANSFER TO THE COMPANY (OR
DESIGNEE THEREOF), SUCH WARRANTS MAY ONLY BE TRANSFERRED AS PROVIDED IN THE
WARRANT AGREEMENT.](1)

                             VOID AFTER APRIL 15, 2010,
                     (OR SUCH EARLIER DATE AS SET FORTH HEREIN)

No. ___                                       Certificate for__________ Warrants

                             PETER KIEWIT SONS', INC.(2)

            WARRANTS TO PURCHASE CLASS D DIVERSIFIED GROUP CONVERTIBLE 
                    EXCHANGEABLE COMMON STOCK, $.0625 PER SHARE

         This Warrant Certificate certifies that _____________________, or
registered assigns, is the registered holder of the number of Warrants (the
"Warrants") specified above.  Subject to the terms and conditions set forth
herein and in the Warrant Agreement referred to on the reverse hereof, each
Warrant initially entitles the registered holder to purchase, subject to the
terms and conditions set forth in this Certificate and the Warrant Agreement,
one fully paid and nonassessable share of Class D Diversified Group Convertible
Exchangeable Common Stock, par value $.0625 per share, of Peter Kiewit Sons',
Inc., a Delaware corporation (the "Company"), after the occurrence of certain
events and the Exercise Conditions with respect to such Warrant 

- ---------------------------------

(1) To be included on all Warrant Certificates representing Warrants which are
    attached to shares of New Class C Stock.  This legend will not be included
    on any Warrant Certificate representing Warrants for which the Exercise
    Condition has occurred.

(2) In the event that the name of the Company is changed or the Redesignation
    occurs, Warrant Certificates issued subsequent to such name change or the
    Redesignation shall be modified accordingly.


                                         A-1
<PAGE>

upon the presentation and surrender of this Warrant Certificate with the
Election of Exercise Form on the reverse hereof duly executed, at the corporate
office of ___________________, as Warrant Agent, or its successor (the "Warrant
Agent"), and payment of the Exercise Price by the methods set forth in the
Warrant Agreement.

         The Exercise Price and the number of Shares purchasable upon exercise
of this Warrant are subject to adjustment upon the occurrence of certain events
as set forth in the Warrant Agreement.

         The Warrants shall expire at 5:00 p.m. New York City Time (the "Close
of Business") on (i) October 15, 1998 (or such later date as may be determined
by the Board of Directors of the Company), if the Class C Exchange has not
occurred on or prior to such date or (ii) April 15, 2010, if the Class C
Exchange occurred on or prior to October 15, 1998 (or such date after October
15, 1998 as may be determined by the Board of Directors of the Company) (such
date of expiration being herein referred to as the "Expiration Date").  After
the Close of Business on the Expiration Date, no Warrant may be exercised and
the Warrants will be void and of no value.

         REFERENCE IS HEREBY MADE TO THE FURTHER PROVISIONS OF THIS WARRANT
CERTIFICATE SET FORTH ON THE REVERSE HEREOF.  SUCH FURTHER PROVISIONS SHALL FOR
ALL PURPOSES HAVE THE SAME EFFECT AS THOUGH FULLY SET FORTH AT THIS PLACE.
This Warrant Certificate shall not be valid unless countersigned by the Warrant
Agent.

         IN WITNESS WHEREOF, the Company has caused this Certificate to be
executed by its duly authorized officers, and the corporate seal hereunto
affixed.

Dated:  ________________

                                  PETER KIEWIT SONS', INC.


[Corporate Seal of Peter               By:
Kiewit Sons', Inc.]                       -----------------------------
                                       Name:
                                       Title:

ATTEST:


By: _________________________



                                         A-2

<PAGE>

Countersigned:

[WARRANT AGENT],
AS WARRANT AGENT

By: _________________________


















                                         A-3
<PAGE>

                      [FORM OF REVERSE OF WARRANT CERTIFICATE]
                                          
                              PETER KIEWIT SONS', INC.

         The Warrants evidenced by this Warrant Certificate are part of a duly
authorized issuance of Warrants, each entitling the registered holder thereof to
purchase one share of Common Stock, issued pursuant to a Warrant Agreement,
dated as of ________, 1998 (the "Warrant Agreement"), duly executed and
delivered by the Company to ________________________, as Warrant Agent (the
"Warrant Agent").  The Warrant Agreement hereby is incorporated by reference in
and made a part of this instrument and is hereby referred to for a description
of the rights, limitation of rights, obligations, duties and immunities
thereunder of the Warrant Agent, the Company and the holders (the words
"holders" or "holder" meaning the registered holders or registered holder) of
the Warrants.  A copy of the Warrant Agreement may be inspected at the Warrant
Agent Office and is available upon written request addressed to the Company. 
All terms used herein that are defined in the Warrant Agreement have the
meanings assigned to them therein.

         As provided in the Warrant Agreement and subject to the terms and
conditions therein set forth, Warrants may be exercised to purchase Shares from
the Company before the Close of Business on the Expiration Date, at the Exercise
Price then in effect, subject to adjustment as described in the Warrant
Agreement.  The Exercise Price, as of any given date, is defined as the Trading
Price of the Common Stock, minus a certain Fixed Dollar Discount, and is as set
forth in the most recent Exercise Price Certificate prior to such date.  The
holder of the Warrants evidenced by this Warrant Certificate may exercise any
such Warrants upon the presentation and surrender of this Warrant Certificate
with the Election to Exercise Form (as set forth herein) duly executed, at the
corporate office of the Warrant Agent, and payment of the Exercise Price.  Such
payment shall be made (i) in cash, (ii) by Share Exercise or (iii) by Cashless
Exercise.  Payment of the Exercise Price in cash shall be made by certified or
official bank check payable to the order of the Company or by wire transfer of
funds to an account designated by the Company for such purpose.  Payment by
Share Exercise shall be made without the payment of cash, by delivering share
certificates, duly endorsed for transfer, representing such number of shares of
Common Stock as shall equal (a) the amount of such payment divided by (b) the
Trading Price used in calculating the Exercise Price in effect on the Exercise
Date.  Payment by Cashless Exercise shall be made without the payment of cash,
by reducing the number of shares of Common Stock that would be obtainable upon
the exercise of a Warrant and payment of the Exercise Price in cash so as to
yield a number of Shares upon the exercise of such Warrant equal to the product
of (1) the number of Shares issuable as of the Exercise Date upon the exercise
of such Warrant (if payment of the Exercise Price were being made in 


                                         A-4
<PAGE>

cash) and (2) a fraction, the numerator of which is the Fixed Dollar Discount as
of the Exercise Date and the denominator of which is the Trading Price as of the
Exercise Date.

         As provided in the Warrant Agreement and subject to the terms and
conditions therein set forth, no Warrant may be exercised prior to the
occurrence of both (i)the Exercise Conditions with respect to such Warrant, and
(ii) the earlier of (A) the first Private Exercise Period following December 31,
1999, and (B) the first Public Exercise Period following such period of at least
90 but less that 180 days after the date on which the Common Stock first becomes
Publicly Traded, as the Company may determine if so requested by an underwriter
of Common Stock in connection with an initial underwritten public offering 
thereof.

         The Exercise Conditions will be deemed to have been met upon both (i)
the delivery to the Warrant Agent of the related documentation required the
Warrant Agreement, and (ii) the occurrence, with respect to a given Warrant (or
fraction thereof) of the earlier of: (A) the repurchase or redemption by PKS of
the share of Class C Stock to which such Warrant is attached; (B) the exchange
of the share of Class C Stock to which such Warrant is attached into another
class of securities of PKS intended to be issued primarily to persons leaving
employment of PKS; (C) April 15, 2006; and (D) the receipt by the Warrant Agent
of the notice from the Company required by the Warrant Agreement that a Change
of Control has occurred.

         In the event that upon any exercise of Warrants evidenced hereby the
number of Warrants actually exercised shall be less than the total number of
Warrants which this Warrant Certificate represents, there shall be issued to the
holder hereof, or such holder's assignee, a new Warrant Certificate evidencing
the Warrants not so exercised.  After the Close of Business on the Expiration
Date, unexercised Warrants shall become wholly void and of no value.

         The Company shall not be required to issue fractions of Shares or any
certificates that evidence fractional Shares.  In lieu of any fractional Share
for which Warrants are exercised, there shall be paid to the registered holder
of the related Warrant Certificate an amount in cash equal to the Trading Price
then in effect multiplied by the fraction represented by such fractional Share.

         Warrant Certificates, when surrendered at the Warrant Agent Office by
the registered holder thereof in person or by a legal representative or attorney
duly authorized in writing, may be exchanged, in the manner and subject to the
limitations provided in the Warrant Agreement, but without payment of any
service charge, for another Warrant Certificate or Warrant Certificates of like
tenor evidencing a like number of Warrants.


                                         A-5
<PAGE>

         Upon due presentment for registration of under of this Warrant
Certificate at the Warrant Agent Office, a new Warrant Certificate or Warrant
Certificates of like tenor and evidencing in the aggregate a like number of
Warrants shall be issued to the transferee in exchange for this Warrant
Certificate, subject to the limitations provided in the Warrant Agreement,
without charge, except for any tax or other governmental charge imposed in
connection therewith.

         The Company and Warrant Agent may deem and treat the registered holder
hereof as the absolute owner of this Warrant Certificate (notwithstanding any
notation of ownership or other writing hereon made by anyone) for the purpose of
any exercise of the Warrants evidenced hereby and for all other purposes, and
neither the Company nor the Warrant Agent shall be affected by any notice to the
contrary.












                                         A-6
<PAGE>

                                ELECTION TO EXERCISE
                                          
                   (TO BE EXECUTED UPON EXERCISE OF THE WARRANT)

         The undersigned hereby irrevocably elects to exercise __________
Warrants represented by this Warrant Certificate, granting the right to purchase
               Shares.

         The undersigned herewith makes payment in full for such Shares at a
price per share provided on this Warrant Certificate and in the Warrant
Agreement in the following manner (please check the type or types of payment and
indicate the portion of the aggregate payment and indicate the portion of the
aggregate payment to be paid by each type of payment):

    / /  exercise _________ Warrants to purchase ___________ Shares for cash by
         payment of $____________.

    / /  exercise _________ Warrants to purchase ____________ Shares through a
         Share Exercise.

    / /  exercise _________ Warrants to purchase ___________ Shares through a
         Cashless Exercise.

         The undersigned hereby represents that the Exercise Event with respect
to the Warrants to be exercised hereby has been satisfied in the manner set
forth below:

    / /  The ________ shares of Class C Stock to which such Warrants were
         attached have been repurchased or redeemed by PKS (attach PKS
         Certificate).

    / /  The ________ shares of Class C Stock to which such Warrants were
         attached have been exchanged into another class of securities of PKS
         intended to be issued primarily to persons leaving employment of PKS
         (attach PKS Certificate).

    / /  The exercise contemplated hereby is to occur after April 15, 2006.

    / /  A Change of Control has occurred.

    / /  The Exercise Condition with respect to the Warrants represented hereby
         was met when such Warrants were held by a prior holder, and this
         Warrant Certificate does not contain the Attachment Legend.


                                         A-7
<PAGE>

         The undersigned requests that a certificate representing the Shares be
registered and delivered as follows:


                                       ----------------------------------------
                                                           NAME

                                       ----------------------------------------
                                                          ADDRESS

                                       ----------------------------------------
                                            DELIVERY ADDRESS (IF DIFFERENT)

         If such number of Warrants exercised hereby is less than the aggregate
number of Warrants exercisable hereunder, the undersigned requests that a new
Warrant Certificate representing the balance of such Warrants shall be
registered and delivered as follows:


                                       ----------------------------------------
                                                           NAME

                                       ----------------------------------------
                                                          ADDRESS

                                       ----------------------------------------
                                            DELIVERY ADDRESS (IF DIFFERENT)


- -------------------------------        ----------------------------------------
SOCIAL SECURITY OR OTHER                                     SIGNATURE
TAXPAYER IDENTIFICATION NUMBER
OF HOLDER

                                       NOTE:  THE ABOVE SIGNATURE MUST
                                       CORRESPOND WITH THE NAME AS WRITTEN UPON
                                       THE FACE OF THIS WARRANT CERTIFICATE IN
                                       EVERY PARTICULAR, WITHOUT ALTERATION OR
                                       ENLARGEMENT OR ANY CHANGE WHATSOEVER. 
                                       IF THE CERTIFICATE REPRESENTING THE
                                       SHARES OR ANY WARRANT CERTIFICATE
                                       REPRESENTING WARRANTS NOT EXERCISED IS
                                       TO BE REGISTERED IN A NAME OTHER THAN
                                       THAT IN WHICH THIS WARRANT CERTIFICATE
                                       IS REGISTERED, THE SIGNATURE OF THE
                                       HOLDER HEREOF MUST BE GUARANTEED.
SIGNATURE GUARANTEED:


- ------------------------------


                                         A-8
<PAGE>

                                      ASSIGNMENT

                  (TO BE EXECUTED BY THE REGISTERED HOLDER IF SUCH
                HOLDER DESIRES TO TRANSFER THE WARRANT CERTIFICATE)

         The undersigned hereby represents that the Warrants represented hereby
may be transferred as a result of:

    / /  The transfer contemplated hereby is a transfer of Warrants
         simultaneous with the shares of Class C Stock to which they are
         attached, represented by PKS stock certificate no. _______.  The
         transfer of both the Warrants represented hereby and such shares of
         Class C Stock are being made to the same transferee,
         __________________, and such transfer of Class C Stock is permitted by
         the Certificate of Incorporation of PKS.  This transfer is therefore
         an Attached Transfer.  (attach PKS Certificate)

    / /  The transfer contemplated hereby is a transfer to the Company or
         designee thereof, and is therefore a Permitted Transfer.

    / /  The ________ shares of Class C Stock to which such Warrants were
         attached, represented by PKS stock certificate no. _______, have been
         repurchased or redeemed by PKS (attach PKS Certificate).

    / /  The ________ shares of Class C Stock to which such Warrants were
         attached, represented by PKS stock certificate no. _______, have been
         exchanged into another class of securities of PKS intended to be
         issued primarily to persons leaving employment of PKS (attach PKS
         Certificate).

    / /  The transfer is occurring after April 15, 2006.

    / /  A Change of Control has occurred.

    / /  The Exercise Conditions with respect to such Warrants were met when
         such Warrants were held by a prior holder, and this Warrant
         Certificate does not contain the Attachment Legend.


                                         A-9
<PAGE>

FOR VALUE RECEIVED, the undersigned registered holder hereby sells, assigns and
transfers unto

                     -----------------------------------------
                                  NAME OF ASSIGNEE


                     -----------------------------------------
                                ADDRESS OF ASSIGNEE

this Warrant Certificate, together with all right, title and interest therein,
and does irrevocably constitute and appoint _________________ attorney, to
transfer the within Warrant Certificate on the books of the Warrant Agent, with
full power of substitution.


- ------------------------------              -------------------------------
         DATED                                        SIGNATURE


                                            NOTE:  THE ABOVE SIGNATURE MUST
                                            CORRESPOND WITH THE NAME AS WRITTEN
                                            UPON THE FACE OF THIS WARRANT
                                            CERTIFICATE IN EVERY PARTICULAR,
                                            WITHOUT ALTERATION OR ENLARGEMENT
                                            OR ANY CHANGE WHATSOEVER.
- ---------------------------------
SOCIAL SECURITY OR OTHER TAXPAYER
IDENTIFICATION NUMBER OF ASSIGNEE



- -------------------------------------
SIGNATURE GUARANTEED:



                                         A-10
<PAGE>

                                                                       EXHIBIT B

                               FORM OF PKS CERTIFICATE

                                                        _________________, _____



[Warrant Agent]
________________________
________________________

Attention:  ________________________________

Re: Peter Kiewit Sons', Inc. (the "Company") 
    Warrants (the "Warrants")
    -----------------------------------------

Dear Sirs:

         This letter relates to ______________ Warrants, represented by Warrant
Certificate No. ___, attached to PKS stock certificate no. _____ representing
_______ shares of Class C Stock, which are to be exercised by _______________
("Holder").  Pursuant to (i) the Warrant Agreement (the "Warrant Agreement")
dated as of _________, 1997 between Peter Kiewit Sons', Inc. and _____________,
as Warrant Agent, and (ii) the Separation Agreement, the undersigned, the Stock
Registrar of PKS Holdings, Inc. ("PKS"), hereby certifies that:

    / /  PKS has received irrevocable instructions from Holder to exchange PKS
         stock certificate no[s]. _______, representing _______ shares of Class
         C Stock, [respectively,] for _______ stock certificate(s),
         representing _______ shares of Class C Stock, [respectively,] on
         _________ [date], and such shares of Class C Stock shall be
         represented by PKS stock certificate no[s]. _______, representing
         _______ shares of Class C Stock [, respectively].

    / /  PKS has received irrevocable instructions from Holder to transfer
         _______ shares of Class C Stock, represented by PKS stock certificate
         no. _____, to _____________ ("Transferee") on _________ [date],
         simultaneous with the transfer to the Transferee of the Warrants which
         are attached to such shares of Class C Stock.  Such transfer of Class
         C Stock is permitted by the Restated Certificate of Incorporation of
         PKS.

    / /  The ________ shares of Class C Stock, represented by PKS stock
         certificate no. _______, to which such 


                                         B-1
<PAGE>

         Warrants were attached, have been repurchased or redeemed by PKS; PKS
         has no present intention to issue or sell any other Class C Stock to
         Holder.

    / /  The ________ shares of Class C Stock to which such Warrants were
         attached, represented by PKS stock certificate no. _______, have been
         exchanged into another class of securities of PKS intended to be
         issued primarily to persons leaving employment of PKS.

         All capitalized terms not defined herein shall have the meanings given
to them in the Warrant Agreement.


                                  Very truly yours,

                                  PKS Holdings, Inc.


                                  -----------------------------
                                  Name:
                                  Title: Stock Registrar






                                         B-2
<PAGE>
                                                                       EXHIBIT C

                      FORM OF PRIVATE EXERCISE PRICE CERTIFICATE


                                                        _________________, _____
[Warrant Agent]
________________________
________________________

Attention:  ________________________________

Re: Peter Kiewit Sons', Inc. (the "Company") 
    Warrants (the "Warrants")
    -----------------------------------------

Dear Sirs:

         Pursuant to the Warrant Agreement dated __________, 1998 by and
between the Company and ________________, as Warrant Agent, the undersigned
officers of the Company hereby certify, without personal liability, that as of
____________, the last Business Day of the _____ fiscal year of the Company, the
value of the terms listed below were as follows:

         Appraised Value:
         Trading Price:
         Base Price:
         Base Discount:
         Minimum Discount
         Fixed Dollar Discount:
         Exercise Price:

         All capitalized terms not defined herein shall have the meanings given
to them in the Warrant Agreement.  Attached hereto is a copy of the Appraisal
conducted by ____________ [Investment Bank] as of ____________, the last
Business Day of the _____ fiscal year of the Company.


                                       Very truly yours,

                                       Peter Kiewit Sons', Inc.

                                       -----------------------------
                                       Name:
                                       Title:


                                       -----------------------------
                                       Name:
                                       Title:





                                         C-1
<PAGE>

                                                                       EXHIBIT D

                      FORM OF PUBLIC EXERCISE PRICE CERTIFICATE


                                                        _________________, _____

[Warrant Agent]
________________________
________________________

Attention:  ________________________________

Re: Peter Kiewit Sons', Inc. (the "Company") 
    Warrants (the "Warrants")
    -----------------------------------------
Dear Sirs:

         Pursuant to the Warrant Agreement dated __________, 1998 by and
between the Company and ________________, as Warrant Agent, the Warrant Agent
hereby certifies, that as of ____________, the last Business Day of the _______
[month, year], the value of the terms listed below were as follows:

         Trading Price:
         Base Price:
         Base Discount:
         Minimum Discount
         Fixed Dollar Discount:
         Exercise Price:

         All capitalized terms not defined herein shall have the meanings given
to them in the Warrant Agreement.

                                       Very truly yours,

                                       Peter Kiewit Sons', Inc.

                                       -------------------------------
                                       Name:
                                       Title:




                                         D-1

<PAGE>
                                                                     Exhibit 3.5


                             CERTIFICATE OF INCORPORATION
                                          OF
                                  PKS HOLDINGS, INC.

1.  The name of the corporation is:  PKS Holdings, Inc.

2.  The address of its registered office in the State of Delaware is
Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County
of New Castle.  The name of its registered agent at such address is The
Corporation Trust Company.

3.  The nature of the business or purposes to be conducted or promoted is to
engage in any lawful act or activity for which corporations may be organized
under the General Corporation Law of Delaware.

4.  The total number of shares of common stock which the corporation shall have
authority to issue is One Thousand (1,000) and the par value of each of such
shares is One Cent ($.01) amounting in the aggregate to Ten Dollars ($10.00).

5.  The board of directors is authorized to make, alter or repeal the by-laws
of the corporation.  Election of directors need not be by written ballot.

6.  The name and mailing address of the incorporator is:

    Michael F. Norton
    1000 Kiewit Plaza
    Omaha, Nebraska  68131

I, THE UNDERSIGNED, being the incorporator hereinbefore named, for the purpose
of forming a corporation pursuant to the General Corporation Law of Delaware, do
make this certificate, hereby declaring and certifying that this is my act and
deed and the facts herein stated are true, and accordingly have hereunto set my
hand this 4th day of August, 1997.

/s/ Michael F. Norton
- ---------------------
Michael F. Norton


<PAGE>
                                                                     Exhibit 3.6


                                       BY-LAWS
                                          OF
                                  PKS HOLDINGS, INC.

                                      ARTICLE I
                                       OFFICES

Section 1.1.  REGISTERED OFFICE AND AGENT.  The registered office of the
corporation is at Corporation Trust Center, 1209 Orange Street, Wilmington,
Delaware.  The registered agent at that address is the Corporation Trust
Company.

Section 1.2.  OTHER OFFICES.  The corporation may have other offices from time
to time as the directors may designate or as the business may require.

                                      ARTICLE II
                                     SHAREHOLDERS

Section 2.1.  ANNUAL MEETINGS.  The annual meeting of shareholders shall be held
on the third Monday in June of each year at such time and place in Omaha,
Nebraska as designated by the Board of Directors.  If this date falls on a legal
holiday, the meeting shall be held on the next following business day.  At this
meeting, directors shall be elected and any other proper business may be
transacted.  If the annual meeting is not held on the designated date, the
directors shall cause the meeting to be held as soon thereafter as convenient.

Section 2.2.  SPECIAL MEETINGS.  Except as provided in the following sentence,
special meetings of the shareholders may be called by the President or by a
majority of the directors.  Special meetings will be called by the President at
the request of holders of a majority of the shares entitled to vote at the
meeting.

Section 2.3.  PLACE OF MEETINGS.  Meeting of shareholders shall be held at 1000
Kiewit Plaza, or such other place as may be designated by those calling the
meeting.

Section 2.4.  NOTICE OF MEETING.  A written notice shall be given to each
shareholder entitled to vote at the meeting not less than 10 nor more than 60
days before each annual and special meeting.  The notice shall state the place,
date, and hour of the meeting.  The notice of a special meeting shall state the
purposes for which the meeting has been called.

Written notices may be given by either personal delivery or mail.  If mailed,
notice is given when deposited in the United States mail, postage prepaid,
directed to the shareholder at his address as it appears on the records of the
corporation.  No notice is required to be given to a shareholder to whom notices
of two consecutive annual meetings (and any other written notices sent between
those meetings) have been mailed addressed to that person at his address shown
on the corporate records and have been returned undeliverable.


<PAGE>

    Section 2.5.  WAIVER OF NOTICE.  A written waiver, signed by a shareholder,
whether before or after a meeting, shall be equivalent to the giving of such
notice.  Attendance by a shareholder, without objection to the notice, whether
in person or by proxy, at a shareholders' meeting shall constitute waiver of
notice of the meeting.

Section 2.6.  VOTING LIST.  At least 10 days before each shareholders' meeting,
the Secretary shall prepare a complete list of shareholders entitled to vote. 
Arranged in alphabetical order, the list shall show the name, address, and
number of shares of each shareholder entitled to vote.  For at least 10 days
before the meeting, the list shall be open to the examination of any
shareholder, for any purpose germane to the meeting, during ordinary business
hours, at (a) the meeting place, or (b) at another place within the city of the
meeting which shall be specified in the notice of the meeting.  The list shall
also be available at the meeting for inspection by any shareholder present.

Section 2.7.  RECORD DATE.  The Board of Directors may fix a record date to
determine which shareholders are entitled to:  (a)  notice of a shareholders'
meeting; (b)  vote at a shareholders' meeting; (c)  express consent to corporate
action in writing without a meeting; (d)  receive payment for dividend; (e)
receive a distribution or allotment of rights; (f) exercise any rights in
respect of any change, conversion, or exchange of stock; or (g) notice for the
purpose of any other lawful action.

The record date shall not be less than 10 nor more than 60 days before the date
of the meeting, nor more than 60 days before any other action.  A determination
of shareholders of record entitled to notice of or to vote at a meeting of
shareholders shall apply to any adjournment of the meeting; provided, however,
that the Board of Directors may fix a new record date for the adjourned meeting.

Section 2.8.  PROXIES.  Each shareholder eligible to vote may authorize another
person or persons to act for him by proxy.  No proxy shall be valid after three
years from its date, unless the proxy provides for a longer period.

Section 2.9.  VOTING RIGHTS.  Each shareholder eligible to vote shall have one
vote for each share of common stock held by such shareholder.

Section 2.10.  QUORUM AND REQUIRED VOTE.  A majority of the shares entitled to
vote, present in person or represented by proxy, shall constitute a quorum at a
meeting of shareholders.  Unless otherwise required by the certificate of
incorporation or by statute, the affirmative vote of the majority of shares
present in person or represented by proxy at the meeting and entitled to vote on
the subject matter shall be the act of the shareholders.  However, if less than
a quorum but more than one-third of all shares eligible to vote is present at a
scheduled meeting, a majority of the shares present may adjourn the scheduled
meeting.

Section 2.11.  ADJOURNED MEETINGS.  No new notice is required if the time and
place of the adjourned meeting is announced at the meeting at which the
adjournment is taken and if the adjournment is for less than 31 days.  At an
adjourned meeting, the shareholders may transact any business which might have
been transacted at the original meeting.


<PAGE>

    Section 2.12.  ACTION WITHOUT A MEETING.  Any action required or permitted
at a shareholders' meeting may be taken without a meeting without a vote, if a
consent in writing, setting forth the action so taken, is signed by all of the
shareholders entitled to vote on the matter.

                                     ARTICLE III
                                      DIRECTORS

Section 3.1.  GENERAL POWERS.  The business and affairs of this corporation
shall be managed by its Board of Directors.

Section 3.2.  QUALIFICATIONS AND NUMBER.  Directors need not be shareholders. 
The number of directors which shall constitute the whole board shall be fixed
from time to time by resolution of the Board.

Section 3.3.  ELECTION.  At each annual meeting, the shareholders shall elect
directors to hold office until the next succeeding annual meeting.  

Section 3.4.  TERM.  Each director shall hold office until his successor is
elected and qualified or until his earlier resignation or removal.  Any director
may resign at any time upon written notice to the corporation.  

Section 3.5.  VACANCIES.  Vacancies and newly created directorships resulting
from any increase in the authorized number of directors may be filled by a
majority of the directors then in office, although less than a quorum, or by a
sole remaining director.

Section 3.6.  ANNUAL MEETING.  The annual meeting of directors shall be held
without notice promptly after the annual meeting of the shareholders and at the
same place.

Section 3.7.  REGULAR MEETINGS.  The Board may provide by resolution for the
time and place of regular meetings, without notice other than such resolution.  

Section 3.8.  SPECIAL MEETINGS.  Special meetings shall be called by the
President. Special meetings shall be called by the president or the secretary on
the written request of two or more directors.  The person calling the meeting
may fix the specific time and place of the meeting.  Notice of any special
meeting shall be given at least three days in advance by written notice
delivered personally or by overnight express mail, telegram, or proven
telecopier facsimile transmission addressed to a director's business address.

Section 3.9.  WAIVER OF NOTICE.  A written waiver, signed by the director,
whether before or after the meeting, shall be equivalent to the giving of such
notice.  Attendance by a director, without objection to the notice, at a meeting
shall constitute waiver of notice of the meeting.

Section 3.10.  TELEPHONE PARTICIPATION.  Directors may participate in a meeting
of the Board by means of conference telephone or similar communications
equipment if all persons participating in the meeting can hear each other. 
Participation in a meeting of this kind shall constitute presence in person at
the meeting.


<PAGE>

    Section 3.11.  QUORUM AND VOTING.  A majority of the whole board of
directors shall constitute a quorum for the transaction of business. The vote of
the majority  of the directors present at a meeting at which a quorum is present
shall be the act of the board of directors unless the vote of a greater number
is required by statute, the certificate of incorporation, or these by-laws.

Section 3.12.  ACTION WITHOUT A MEETING.  Any action that may be taken at a
meeting of the directors may be taken without a meeting if a consent in writing,
setting forth the action taken, is signed by all directors.

Section 3.13.  COMPENSATION.  By resolution of the Board of Directors, each
director may be paid a fixed sum, and any expenses, for attendance at a board
meeting.  No such payment shall preclude a director from receiving compensation
for serving the corporation in any other capacity.

                                      ARTICLE IV
                                       OFFICERS

Section 4.1.  NUMBER.  The officers of the corporation must include a President
and a Secretary.  The Board of Directors may elect additional officers and
appoint agents as it determines necessary.  Any two or more offices may be held
by the same person, except the offices of President and Secretary.

Section 4.2.  ELECTION.  The President and Secretary shall be elected at the
annual meeting of the Board of Directors.  Other officers may be elected by the
Board of Directors from time to time.

Section 4.3.  TERM.  Each officer shall hold office until his successor is
elected and qualified or until his earlier resignation or removal.  Any officer
may resign at any time upon written notice to the corporation.

Section 4.4.  REMOVAL.  Any officer or agent may be removed from office, with or
without cause, at any time by a majority of the whole Board of Directors,
subject to the provisions of any written employment contract between the
corporation and such person.

Section 4.5.  VACANCY.  Any vacancy in any office may be filled for the
unexpired portion of the term by the Board of Directors.

Section 4.6.  PRESIDENT.  The President shall be the chief executive officer 
of the corporation, and shall supervise and manage the operations of the 
corporation, subject to the control of the Board of Directors.

Section 4.7.  SECRETARY.  The Secretary shall have the duties to:  (a) record
the proceedings of the meetings of the shareholders and directors in a book 
kept for that purpose; (b) maintain the stock ledger and shareholder voting 
list; (c) give proper notice of 


<PAGE>

meetings; (d) attest to and sign instruments, stock certificates, and other
certificates on behalf of the corporation; and (e) affix the corporate seal when
proper.

Section 4.8.  POWERS AND DUTIES.  The officers of the corporation shall have
such powers and perform such duties as from time to time may be assigned them by
the Board of Directors.  The Board of Directors may from time to time delegate
the powers and duties of any officer to any other officer, director, or other
person whom it may select.

Section 4.9.  COMPENSATION.  The compensation of all officers shall be fixed by
the Board of Directors.  An officer, who is also a director, may be compensated
in both capacities.

Section 4.10.  BONDING.  Any officer, agent, or employee of the corporation, if
so required by the Board of Directors, shall be bonded for the faithful
performance of his duties, with such conditions, and security as the board may
require.

                                      ARTICLE V
                                        STOCK

Section 5.1.  STOCK CERTIFICATES.  The directors shall determine the form of
certificates which represent ownership of shares of the corporation.  Each
certificate shall contain the holder's name and the number of shares issued. 
Each certificate shall be signed by the President and the Secretary.  Each
certificate shall be impressed with the corporate seal.  Each certificate shall
be consecutively numbered.  The name and address of the person to whom the
shares are issued, with the number of shares and date of issue,  shall be
entered in the stock ledger of the corporation.

Section 5.2.  TRANSFER OF STOCK.  Transfers of shares shall be made only on the
stock transfer books of the corporation.  On surrender to the corporation of a
stock certificate properly endorsed by the holder of record or accompanied by
proper evidence of authority to transfer, a new certificate shall be issued to
the person entitled.  However, the requirements of any applicable stock transfer
restriction agreement must also be satisfied.  The old certificate shall be
cancelled and the transaction recorded in the stock ledger.

Section 5.3.  LOST CERTIFICATES.  The corporation shall issue a new stock
certificate in place of a certificate previously issued, if the holder: (a)
claims by affidavit that the certificate has been lost, destroyed, or stolen,
and (b) gives the corporation a bond or other indemnity as the directors
determine appropriate.

Section 5.4.  REGISTERED SHAREHOLDERS.  The person in whose name shares are
registered in the corporation's stock ledger shall be deemed by the corporation
to be the owner of those shares for all purposes.  The corporation shall not be
required to recognize any equitable or other claim or interest in such shares by
any other 


<PAGE>

person, whether or not it has actual or other notice of such claim.

                                      ARTICLE VI
                                    MISCELLANEOUS

Section 6.1.  SEAL.  The corporate seal shall contain the name of the
corporation as well as the words "Corporate Seal" and "Delaware."

Section 6.2.  FISCAL YEAR.  The fiscal year of the corporation shall end on the
last Saturday of each December.

Section 6.3.  CONTRACTS, ETC.  The directors shall determine by resolution which
persons shall be empowered to sign contracts, bids, proposals, certificates, and
other instruments of the corporation.  Such authority may be general or confined
to specific instances.

Section 6.4.  CHECKS, ETC.  All checks or demands for money and notes of the
corporation shall be signed by such officer or officers or such other person or
persons as the Board of Directors may from time to time designate.

Section 6.5.  DIVIDENDS.  Dividends upon the capital stock of the corporation,
subject to the provisions of the certificate of incorporation, if any, may be
declared by the Board of Directors at any regular or special meeting, pursuant
to law.  Dividends may be paid in cash, in property, or in shares of the capital
stock.

Section 6.6.  RESERVES.  Before payment of any dividend there may be set aside
out of any funds of the corporation available for dividends such sum or sums as
the directors from time to time, in their absolute discretion, determine proper
as a reserve fund to meet contingencies, or for such other purpose as the
directors shall think conducive to the interest of the corporation, and the
directors may abolish any such reserve in the manner in which it was created.

                                     ARTICLE VII
                                      AMENDMENTS

These by-laws may be altered, amended, or repealed and new By-laws may be
adopted by the board of directors or the shareholders.

ADOPTED on August 4, 1997.

/s/ Michael F. Norton
- ---------------------
Michael F. Norton
Sole Incorporator


<PAGE>





Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549


                           Re:   Proxy Statement/Joint Prospectus of
                                 Peter Kiewit Sons', Inc. and
                                 PKS Holdings, Inc. on Form S-4


We are aware that our reports dated August 25, 1997 on our review of the pro 
forma consolidated balance sheet and statement of operations of Peter Kiewit 
Sons', Inc., and the pro-forma condensed balance sheets and statements of 
operations of Kiewit Construction and Mining Group, a business group of Peter 
Kiewit Sons', Inc. as of June 30, 1997 and for the six months then ended are 
included in the above-referenced proxy statement/joint prospectus on Form 
S-4.  Pursuant to Rule 436(c) under the Securities Act of 1933, these reports 
should not be considered a part of the registration statement prepared or 
certified by us within the meaning of Sections 7 and 11 of that Act.



Coopers & Lybrand L.L.P.



Omaha, Nebraska
August 28, 1997


<PAGE>
                                                                    EXHIBIT 23.1
 
                       CONSENT OF INDEPENDENT ACCOUNTANTS
 
    We consent to the incorporation by reference in the proxy statement/joint
prospectus of Peter Kiewit Sons', Inc. and PKS Holdings, Inc. on Form S-4 of our
report dated March 14, 1997, except for Note 20, as to which the date is March
26, 1997, of our audits of the consolidated financial statements and financial
statement schedule of Peter Keiwit Sons', Inc. as of December 28, 1996 and
December 30, 1995, and for the three years ended December 28, 1996, which report
is included in the Annual Report on Form 10-K of Peter Kiewit Sons', Inc. We
also consent to the inclusion in the aforementioned proxy statement/joint
prospectus of our report dated March 14, 1997 except for Note 15, as to which
the date is March 26, 1997, of our audits of the financial statements and
financial statement schedule of Kiewit Construction and Mining Group, a business
group of Peter Kiewit Sons', Inc. as of December 28, 1996 and December 30, 1995
and for the three years ended December 28, 1996. We further consent to the
inclusion in the aforementioned proxy statement/joint prospectus of our reports
dated August 25, 1997, of our examinations of the pro forma consolidated
condensed statement of operations of Peter Kiewit Sons', Inc. and Kiewit
Construction and Mining Group, a business group of Peter Kiewit Sons', Inc. for
the year ended December 28, 1996. We also consent to the reference to our Firm
under the caption "Experts."
 
Coopers & Lybrand L.L.P.
 
Omaha, Nebraska
August 28, 1997

<PAGE>
                                                                 August 29, 1997
 
Peter Kiewit Sons', Inc.
1000 Kiewit Plaza
Omaha, Nebraska 68131
 
Ladies and Gentlemen:
 
    The undersigned hereby consents to being named in the Joint Registration
Statement on Form S-4 of Peter Kiewit Sons', Inc. and PKS Holdings, Inc. filed
with the Securities and Exchange Commission, and any amendments thereto, as a
person who is expected to serve on the Board of Directors of Peter Kiewit Sons',
Inc.
 
                                               Very truly yours,
 
                                               /s/ R. DOUGLAS BRADBURY

<PAGE>
                                                                 August 29, 1997
 
Peter Kiewit Sons', Inc.
1000 Kiewit Plaza
Omaha, Nebraska 68131
 
Ladies and Gentlemen:
 
    The undersigned hereby consents to being named in the Joint Registration
Statement on Form S-4 of Peter Kiewit Sons', Inc. and PKS Holdings, Inc. filed
with the Securities and Exchange Commission, and any amendments thereto, as a
person who is expected to serve on the Board of Directors of Peter Kiewit Sons',
Inc.
 
                                               Very truly yours,
 
                                               /s/ ROBERT E. JULIAN

<PAGE>
                                                                 August 29, 1997
 
Peter Kiewit Sons', Inc.
1000 Kiewit Plaza
Omaha, Nebraska 68131
 
Ladies and Gentlemen:
 
    The undersigned hereby consents to being named in the Joint Registration
Statement on Form S-4 of Peter Kiewit Sons', Inc. and PKS Holdings, Inc. filed
with the Securities and Exchange Commission, and any amendments thereto, as a
person who is expected to serve on the Board of Directors of Peter Kiewit Sons',
Inc.
 
                                               Very truly yours,
 
                                               /s/ DAVID C. MCCOURT

<PAGE>
                                                                 August 29, 1997
 
Peter Kiewit Sons', Inc.
1000 Kiewit Plaza
Omaha, Nebraska 68131
 
Ladies and Gentlemen:
 
    The undersigned hereby consents to being named in the Joint Registration
Statement on Form S-4 of Peter Kiewit Sons', Inc. and PKS Holdings, Inc. filed
with the Securities and Exchange Commission, and any amendments thereto, as a
person who is expected to serve on the Board of Directors of Peter Kiewit Sons',
Inc.
 
                                               Very truly yours,
 
                                               /s/ MICHAEL B. YANNEY


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