KENETECH CORP
SC TO-T/A, EX-99.(A)(1)(VII), 2000-11-27
COGENERATION SERVICES & SMALL POWER PRODUCERS
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<PAGE>

                                                            Exhibit (a)(1)(vii)

                 Supplement to the Offer to Purchase for Cash
                            Dated November 6, 2000

                    All Outstanding Shares of Common Stock,
             Together With The Associated Rights Attached Thereto

                                      of

                             KENETECH Corporation

                                      at

                              $1.04 Net Per Share

                                      by

                                KC Merger Corp.
                         a wholly owned subsidiary of

                            KC Holding Corporation
                         a wholly owned subsidiary of

                        ValueAct Capital Partners, L.P.

 THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
             TIME, DECEMBER 7, 2000, UNLESS THE OFFER IS EXTENDED.


   NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THE TRANSACTION, PASSED UPON THE
MERITS OR FAIRNESS OF THE TRANSACTION, OR PASSED UPON THE ADEQUACY OR ACCURACY
OF THE DISCLOSURE IN THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

   A SUMMARY OF THE PRINCIPAL TERMS OF THE OFFER APPEARS ON PAGES 1 THROUGH 4
OF THIS SUPPLEMENT. YOU SHOULD READ THIS ENTIRE DOCUMENT AND THE OFFER TO
PURCHASE PREVIOUSLY CIRCULATED CAREFULLY BEFORE DECIDING WHETHER TO TENDER
YOUR SHARES AND THE RIGHTS ATTACHED THERETO.

                               ----------------
                    The Information Agent For The Offer is:

                           MacKenzie Partners, Inc.
November 26, 2000
<PAGE>

<TABLE>
<S>                                                                         <C>
INTRODUCTION...............................................................   5

SPECIAL FACTORS............................................................   5
  1.Background of the Transaction; Past Contacts, Negotiations and
   Agreements..............................................................   5
  2.Purposes, Alternatives, Reasons, Effects and Plans.....................   7
  3.      Recommendation of the Special Committee and the Board of
          Directors of KENETECH; Fairness of the Transaction...............  10
  4.      Position of Parent, Purchaser, VAC and Mr. Lerdal as to the
          Fairness of the Offer and the Merger.............................  10
  5.      Interests of Certain Persons in the Offer and the Merger.........  11
  6.      Reports, Opinions, Appraisals and Negotiations...................  12

THE TENDER OFFER...........................................................  21
  1.      Terms of the Offer...............................................  21
  8.      Certain Information Concerning KENETECH..........................  21
  9.      Certain Information Concerning Purchaser and Parent..............  22
  12 Certain Conditions of the Offer.......................................  22
  13 Certain Legal Matters and Regulatory Approvals........................  23

SCHEDULE A Certain Information Concerning Purchaser, Parent and VAC........ A-1
</TABLE>

<PAGE>

                              SUMMARY OF THE OFFER

   KC Merger Corp. is offering to buy all outstanding shares of KENETECH
Corporation's common stock, together with the associated rights attached
thereto. The tender price is $1.04 per share, net to you in cash. Set out below
are some of the questions that you, as a stockholder of KENETECH, may have and
answers to those questions.

   The information in this Summary of the Offer is not complete. This
Supplement, together with the Offer to Purchase and the Letter of Transmittal
that were previously distributed to you, contain additional important
information. We urge you to carefully read all of the material about our offer
that is sent to you before you decide whether to accept our offer.

   WHO IS OFFERING TO BUY MY SECURITIES?

   Our name is KC Merger Corp. We are a Delaware corporation formed for the
purpose of making this offer. We are a wholly owned subsidiary of KC Holding
Corporation, a Delaware corporation. KC Holding Corporation is a wholly owned
subsidiary of ValueAct Capital Partners, L.P., a Delaware limited partnership.

   WHAT ARE THE CLASSES AND AMOUNTS OF SECURITIES SOUGHT IN THE OFFER?

   We are offering to buy all of the outstanding shares of common stock of
KENETECH.

   HOW MUCH ARE YOU OFFERING TO PAY AND WHAT IS THE FORM OF PAYMENT?

   We are offering to pay $1.04 per share, net to you, in cash.

   WILL I HAVE TO PAY ANY FEES OR COMMISSIONS?

   No, tendering stockholders will not have to pay brokerage fees or
commissions.

   DO YOU HAVE THE FINANCIAL RESOURCES TO MAKE PAYMENT?

   ValueAct Capital Partners, L.P. will provide KC Holding Corporation with
sufficient funds from its own resources to acquire all tendered shares or
shares to be acquired pursuant to the merger. KC Holding Corporation will
contribute these funds to KC Merger Corp. ValueAct Capital Partners, L.P. has
guaranteed the performance by each of KC Holding Corporation and KC Merger
Corp. of its covenants, duties and obligations under the merger agreement. See
pages 42 and 43 of the Offer to Purchase.

   IS YOUR FINANCIAL CONDITION RELEVANT TO MY DECISION OF WHETHER TO TENDER IN
THE OFFER?

   We do not think that our financial condition is relevant to your decision of
whether to tender shares and accept the offer because:

  .  the offer is being made for all outstanding shares solely for cash,

  .  the offer is not subject to any financing condition, and

  .  if we consummate the offer, we will acquire all remaining shares for the
     same cash price pursuant to the merger.

   HOW LONG DO I HAVE TO DECIDE WHETHER TO TENDER IN THE OFFER?

   The offer will expire at 12:00 midnight, New York City time on December 7,
2000, unless we extend the offer.

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<PAGE>


   CAN THE OFFER BE EXTENDED, AND UNDER WHAT CIRCUMSTANCES?

   Yes, we may extend the offer if, among other reasons, the number of shares
of KENETECH stock that have been validly tendered and not withdrawn represents
less than 85% of the then issued and outstanding shares of KENETECH stock on a
fully diluted basis, not including shares held by Mr. Mark D. Lerdal,
KENETECH's Chairman, President and Chief Executive Officer. See pages 25
through 27 of the Offer to Purchase.

   HOW WILL I BE NOTIFIED IF THE OFFER IS EXTENDED?

   If we are required to extend the offer, or if we otherwise decide to extend
the offer, we will issue a press release giving the new expiration date no
later than 9:00 a.m., New York City time, on the first business day after the
previously scheduled expiration of the offer.

   WILL THERE BE A SUBSEQUENT OFFERING PERIOD?

   We do not currently intend to include a subsequent offering period for the
offer, although we reserve our right to do so. A subsequent offering period,
if one is included, will be an additional period of time beginning after we
have purchased shares tendered during the offer, during which stockholders may
tender their shares and receive the offer consideration.

   HOW WILL I BE NOTIFIED IF THERE IS A SUBSEQUENT OFFERING PERIOD?

   If we decide to provide a subsequent offering period, we will make a public
announcement of our decision by 9:00 a.m., New York City time, on the next
business day following the initial closing of the tender offer. See pages 26
and 27 of the Offer to Purchase.

   WHAT ARE THE MOST SIGNIFICANT CONDITIONS TO THE OFFER?

   We are not required to complete the tender offer unless:

  .  the number of tendered and not withdrawn shares represents at least 85%
     of the shares of KENETECH stock outstanding on a fully diluted basis as
     defined in the merger agreement, excluding shares held by Mr. Lerdal,

  .  there is no material adverse change in KENETECH or its business, and

  .  there is no pending suit, action or proceeding before any court or
     governmental entity challenging the tender offer or proposed merger.

   The offer is also subject to a number of other conditions. See pages 43
through 44 of the Offer to Purchase.

   HOW IS KENETECH'S CHIEF EXECUTIVE OFFICER INVOLVED IN THE OFFER?

   On October 24, 2000, KC Holding Corporation and ValueAct Capital Partners,
L.P. entered into a separate agreement with Mr. Mark D. Lerdal, the Chairman,
President and Chief Executive Officer of KENETECH, pursuant to which Mr.
Lerdal agreed to contribute all of his shares of KENETECH stock to KC Holding
Corporation for shares of KC Holding Corporation stock. As a result, Mr.
Lerdal will become a stockholder of KC Holding Corporation, owning
approximately 35.3% of KC Holding Corporation, and will not receive any cash
for the shares he contributes. He will, however, have the opportunity to share
in any future growth of KENETECH, which following completion of the offer and
the merger will be a wholly owned subsidiary of KC Holding Corporation. The
shares to be contributed represent approximately 36% of the outstanding shares
of KENETECH stock. See pages 35 and 36 of the Offer to Purchase.

   Simultaneously with entering into the merger agreement, we entered into a
voting agreement with Mr. Lerdal in which Mr. Lerdal agreed not to tender his
shares in the offer and to vote all of his shares in favor of the merger and
the merger agreement and against any other takeover proposal.

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<PAGE>


   WHAT DOES THE KENETECH BOARD OF DIRECTORS THINK OF THE OFFER?

   We are making the offer pursuant to a merger agreement among us and
KENETECH. The Board of Directors of KENETECH, with Mr. Lerdal abstaining, after
receiving the recommendation of a special committee of the Board of Directors
comprised solely of independent directors, has determined that the merger
agreement and the transactions contemplated therein, including the offer and
the merger, are fair to and in the best interests of KENETECH and its
stockholders, and recommends that you tender your KENETECH shares in the offer.
See pages 12 through 16 of the Offer to Purchase.

   WILL KENETECH CONTINUE AS A PUBLIC COMPANY?

   No. If the merger takes place, KENETECH will no longer be publicly owned.
Even if the merger does not take place, if we purchase all the tendered shares,
there may be so few remaining stockholders and publicly held shares that the
common stock will no longer be eligible to be traded on the OTC Bulletin Board
or other securities market, there may not be a public trading market for the
common stock and KENETECH may cease making filings with the Securities and
Exchange Commission or otherwise cease being required to comply with SEC rules
relating to publicly held companies.

   WILL THE TENDER OFFER BE FOLLOWED BY A MERGER IF ALL OF KENETECH'S SHARES
ARE NOT TENDERED IN THE OFFER?

   If the offer is successful, we will acquire any remaining shares of KENETECH
stock in a later merger for $1.04 per share in cash as provided in a merger
agreement entered into on October 25, 2000 among KC Holding Corporation, KC
Merger Corp. and KENETECH. KENETECH stockholders will not have appraisal rights
in the tender offer but will have appraisal rights in the merger.

   If we receive at least 85% of the then issued and outstanding shares of
KENETECH stock, excluding shares held by Mr. Lerdal, and Mr. Lerdal contributes
his shares to us as described below, we will own at least 90% of the
outstanding shares of KENETECH stock. Our ownership of 90% or more of the
outstanding shares of KENETECH stock will allow us to complete a "short-form"
merger under applicable state law. This type of merger will not require
approval by any KENETECH stockholder.

   IF I DECIDE NOT TO TENDER, HOW WILL THE OFFER AFFECT MY SHARES?

   Stockholders not tendering in the offer will receive pursuant to the merger
the same amount of cash per share which they would have received had they
tendered their shares in the offer. Therefore, if the merger takes place, the
only difference to you between tendering your shares and not tendering your
shares (other than the availability of certain appraisal rights) is that you
will be paid earlier if you tender your shares in the offer.

   WHAT IS THE MARKET VALUE OF MY SHARES AS OF A RECENT DATE?

   The closing bid price for a share of KENETECH stock was:

  .  $0.71 on October 25, 2000, the last full trading day before we announced
     the execution of the merger agreement with KENETECH, and

  .  $1.00 on November 24, 2000, the last trading day before the printing of
     this Supplement.

   Before deciding whether to tender your shares, you should obtain a current
market quotation for the shares. See page 32 of the Offer to Purchase.

   HOW DO I TENDER MY SHARES?

   If you wish to accept the offer, this is what you must do:

  .  If you are a record holder (and, therefore, a stock certificate has been
     issued to you) you must complete and sign the enclosed letter of
     transmittal and send it with your stock certificate to the depositary
     for

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     the offer or follow the procedures described in the offer for book-entry
     transfer. These materials must reach the depositary before the offer
     expires. Detailed instructions are contained in the letter of
     transmittal and on pages 28 through 30 of the Offer to Purchase.

  .  If you are a record holder but your stock certificate is not available
     or you cannot deliver it to the depositary before the offer expires, you
     may be able to tender your shares using the enclosed notice of
     guaranteed delivery. Please call our information agent, MacKenzie
     Partners, Inc., at (212) 929-5500 for assistance.

  .  If you hold your shares through a broker or bank, you should contact
     your broker or bank and give instructions that your shares be tendered.

   UNTIL WHAT TIME CAN I WITHDRAW PREVIOUSLY TENDERED SHARES?

   If, after tendering your shares in the offer, you decide that you do NOT
want to accept the offer, you can withdraw your shares by instructing the
depositary before the offer expires. If you tendered by giving instructions to
a broker or bank, you must instruct the broker or bank to arrange for the
withdrawal of your shares. See pages 30 and 31 of the Offer to Purchase.

   If we decide to provide a "subsequent offering period," we will accept
shares tendered during that period immediately and thus you will not be able
to withdraw shares tendered during any subsequent offering period. See pages
26, 27 and 31 of the Offer to Purchase.

   WHO CAN I TALK TO IF I HAVE QUESTIONS ABOUT THE TENDER OFFER?

   MacKenzie Partners, Inc. is acting as the information agent for our tender
offer. You can contact MacKenzie Partners, Inc. at (800) 322-2885 (toll free)
or, if you live outside of the U.S. and Canada, at (212) 929-5500 (call
collect).

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<PAGE>

To The Holders of Shares of Common Stock
  of KENETECH Corporation:

                                 INTRODUCTION

   The following information amends and supplements the Offer to Purchase
dated November 6, 2000 (the "Offer to Purchase") of KC Merger Corp., a
Delaware corporation ("Purchaser") and a wholly owned subsidiary of KC Holding
Corporation, a Delaware corporation ("Parent"), pursuant to which Purchaser is
offering to purchase all of the outstanding shares, together with the
associated rights attached thereto issued pursuant to that certain Rights
Agreement, dated May 4, 1999, as amended (the "Shares"), of common stock, par
value $.000l per share (the "Common Stock"), of KENETECH Corporation, a
Delaware corporation ("KENETECH"), at $1.04 per Share, net to the seller in
cash (the "Per Share Amount"), without interest thereon upon the terms and
subject to the conditions set forth in the Offer to Purchase, this Supplement
and in the related Letter of Transmittal (which, together with any amendments
or additional supplements thereto, collectively constitute the "Offer").
Parent is a wholly owned subsidiary of ValueAct Capital Partners, L.P., a
Delaware limited partnership. VA Partners, L.L.C., a Delaware limited
liability company, is the sole general partner of ValueAct Capital Partners,
L.P. Unless the context requires otherwise, all references in the Offer to
Purchase and this Supplement to "VAC" shall collectively refer to VA Partners,
L.L.C. and ValueAct Capital Partners, L.P.

   This Supplement should be read in conjunction with the Offer to Purchase.
This Supplement has been prepared to include additional information requested
by the Commission in the course of its review of the Offer to Purchase and to
disclose certain events that have occurred since the distribution of the Offer
to Purchase. The terms and conditions previously set forth in the Offer to
Purchase and the Letter of Transmittal previously mailed to stockholders
remain applicable in all respects to the Offer. Terms used but not defined
have the meaning set forth in the Offer to Purchase.

   KENETECH has filed with the Commission and previously mailed to its
stockholders a Solicitation/Recommendation Statement on Schedule 14D-9 (the
"Schedule 14D-9"). KENETECH is filing with the Commission an amendment to the
Schedule 14D-9 that attaches this Supplement and incorporates by reference
this Supplement to the extent applicable. Accordingly, the following
information shall be deemed to amend and supplement the Schedule 14D-9 to the
extent applicable.

   THIS SUPPLEMENT, THE OFFER TO PURCHASE AND THE RELATED LETTER OF
TRANSMITTAL CONTAIN IMPORTANT INFORMATION THAT YOU SHOULD READ CAREFULLY AND
IN THEIR ENTIRETY BEFORE YOU MAKE ANY DECISION WITH RESPECT TO THE OFFER.

                                SPECIAL FACTORS

   1. Background of the Transaction; Past Contacts, Negotiations and
Agreements

   The discussion set forth in "Special Factors--Background of the
Transaction; Past Contacts, Negotiations and Agreements" is hereby amended and
supplemented as follows:

   The second full paragraph on page 7 of the Offer to Purchase is hereby
amended and supplemented to add the following to the end of such paragraph:

  Mr. Winn resigned from the Special Committee to avoid any appearance of
  impropriety arising from his affiliation with Terrasearch, Inc. Terrasearch
  had entered into a consulting agreement with KENETECH on January 1, 2000
  that provided for cash payments and warrants to Terrasearch, and this
  agreement would be subject to renewal on December 31, 2000. For additional
  information regarding Mr. Winn and Terrasearch, see "Special Factors--
  Interests of Certain Persons in the Offer and the Merger."


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<PAGE>

   The last sentence of the last paragraph on page 7 of the Offer to Purchase
is hereby amended and restated to read in its entirety as follows:

  The Special Committee also discussed with its legal counsel and
  representatives of Houlihan Lokey the possibility of enhancing the
  valuation of KENETECH by obtaining insurance for the deferred benefit for
  deconsolidated subsidiary losses liability reported on KENETECH's financial
  statements, which was established in connection with KENETECH's utilization
  of certain tax benefits generated by a subsidiary that was deconsolidated
  for financial statement purposes as a result of such subsidiary's
  bankruptcy.

   The first paragraph on page 9 of the Offer to Purchase is hereby amended
and restated to read in its entirety as follows:

     Representatives of Houlihan Lokey met with representatives of VAC on
  September 15, 2000, to discuss the valuation approaches and underlying
  assumptions used in their respective valuations of KENETECH. During these
  discussions, VAC and Houlihan Lokey reviewed in general terms the
  methodology used by each to value certain of KENETECH's larger investments.
  The parties spent a significant amount of time discussing valuation
  approaches and underlying assumptions relating to KENETECH's investment in
  the Astoria energy project. Based upon these discussions, Houlihan Lokey
  revised one of its underlying assumptions relating to the cash flows to
  KENETECH as a result of the ability of the Astoria project to receive
  additional financing support from a third party. The meeting was concluded
  without the parties specifically addressing the value of KENETECH's
  investment in the Astoria project. Later that day, the Special Committee
  met with its legal counsel and Houlihan Lokey to receive Houlihan Lokey's
  report on those discussions. After discussing valuation issues with
  Houlihan Lokey, the Special Committee authorized Houlihan Lokey to make a
  counterproposal at $1.08 per Share. Counsel to the Special Committee
  contacted VAC's counsel to relay the proposal and to discuss other terms of
  the potential transaction.

   The last full paragraph on page 9 of the Offer to Purchase is hereby
amended and supplemented to add the following to the end of such paragraph:

  In general, these discussions related to: (i) the terms upon which Mr.
  Lerdal would contribute his Shares to Parent, (ii) the composition of
  Parent's board of directors after the Merger and the need to have certain
  significant corporate transactions approved by all the members of the
  board, (iii) the appropriate procedure to resolve any disagreements between
  VAC and Mr. Lerdal on a going forward basis and (iv) the terms of Mr.
  Lerdal's employment agreement, including its duration, compensation
  arrangements and requirement that Mr. Lerdal permit VAC to participate in
  certain investment opportunities on a pro rata basis.

   The carryover paragraph at the top of page 10 of the Offer to Purchase is
hereby amended and supplemented to add the following to the end of such
paragraph:

  In addition, during this period Potter Anderson & Corroon LLP ("PAC")
  reviewed the following filings from the cause of action filed in the
  Delaware Court of Chancery styled Kohls v. Duthie, et. al.: (i) plaintiffs'
  first amended complaint; (ii) the briefs filed by all parties in support of
  and in opposition to defendants' motion to dismiss; (iii) the Court's
  opinion denying defendants' motion to dismiss; and (iv) defendants'
  application for certification of interlocutory appeal. In addition, PAC
  reviewed an affidavit from a representative of the seller of the shares at
  issue, in which the representative affirmed that he did not offer the
  shares to KENETECH and would not have recommended the sale of the shares to
  KENETECH for fear that such a transaction might be rescinded because of the
  possible legal impediments to KENETECH buying the shares, which rescission
  would have had adverse tax consequences to the seller. PAC also discussed
  the action with counsel for the defendants. PAC was not able to speak with
  plaintiffs' counsel due to the confidential nature of the negotiations
  between KENETECH and VAC. PAC considered whether the action was an asset of
  KENETECH, analyzed KENETECH's costs associated with the action and
  ultimately concluded that the plaintiffs in Kohls v. Duthie had a low
  probability of success. PAC discussed its assessment of Kohls v. Duthie
  with the Special Committee. PAC also shared its analysis and the basis for
  its analysis (as well as each of the documents referenced above) with
  Houlihan Lokey. Houlihan Lokey

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<PAGE>

  concluded and advised the Special Committee that, given PAC's analysis and
  advice as to the plaintiffs' low probability of success, the derivative
  claim added not more than $.01 per share of value to KENETECH.

   The third paragraph on page 10 of the Offer to Purchase is hereby amended
and restated in its entirety to read as follows:

     Also on October 24, 2000, the Special Committee met with its legal
  counsel to review a revised draft of the Merger Agreement. At the meeting,
  the Special Committee's counsel discussed the terms of the Merger Agreement
  and the history and status of the negotiations. The Special Committee's
  counsel also noted the Special Committee members' earlier analysis and
  ultimate conclusion, based on discussions with insurance brokers and the
  terms of the preliminary proposal that had been received, that the
  contingent liability for which insurance had been considered could not be
  insured on reasonable terms. Counsel also discussed with the Special
  Committee, among other things, the duties of the Special Committee in
  considering the Merger Agreement. The meeting was then recessed to be
  reconvened the next day. During such meeting it was noted that none of VAC,
  Parent or Purchaser, or any of its representatives, were being requested to
  agree to seek to dismiss Kohls v. Duthie following the successful
  completion of the Offer and the Merger. The Special Committee did not
  believe, however, that it was likely that VAC would prosecute the action in
  plaintiffs' place.

   The following information is hereby added to page 11 of the Offer to
Purchase immediately following the first paragraph thereon:

     On November 9, 2000, Robert L. Kohls and Louise A. Kohls moved to file a
  second amended and supplemental complaint in an action pending in the Court
  of Chancery of the State of Delaware in and for New Castle County styled
  Kohls v. Duthie, et. al. The plaintiffs request, among other things, that
  the Chancery Court: (i) issue a preliminary injunction enjoining the
  consummation of the Merger Agreement; (ii) enter a permanent injunction
  prohibiting the consummation of the Merger Agreement; and (iii) award
  plaintiffs their attorneys' fees, costs, and other expenses. A hearing on
  plaintiffs' application for preliminary injunction is scheduled for
  December 5, 2000, at 3:00 p.m. E.S.T. KENETECH has been informed that the
  individual named defendants intend to defend this action vigorously, and,
  to the extent that it does not involve derivative claims, KENETECH intends
  to defend this action vigorously. For additional information regarding this
  litigation, see "The Tender Offer--Certain Legal Matters and Regulatory
  Approval" included in this Supplement.

   2. Purposes, Alternatives, Reasons, Effects and Plans

   The discussion set forth in "Special Factors--Purposes, Alternatives,
Reasons, Effects and Plans" is hereby amended and restated in its entirety to
read as follows:

     Purposes. The purpose of the Offer and the Merger is for Parent to
  acquire control of, and the entire equity interest in, KENETECH. The Offer,
  as the first step in the acquisition of KENETECH, is intended to facilitate
  the acquisition of all outstanding Shares. The purpose of the Merger is to
  acquire all of the outstanding Common Stock not purchased pursuant to the
  Offer or otherwise acquired by Parent or Purchaser. If, after consummation
  of the Offer and the contribution by Mr. Lerdal of the Contribution Shares,
  we own at least 90% of the Shares then outstanding, we believe that we will
  be able to cause the Merger to occur without a vote of KENETECH's
  stockholders. If, however, after consummation of the Offer, we own less
  than 90% of the Shares then outstanding, a meeting of KENETECH's
  stockholders will be required under applicable state law to adopt the
  Merger Agreement. In such event, however, we would own, as a result of the
  Minimum Condition being satisfied, enough Shares to adopt the Merger
  Agreement in accordance with the applicable state law and the Restated
  Certificate without the affirmative vote of any other stockholder.

     VAC believes that KENETECH's future business prospects can be improved
  through VAC's active participation in the strategic direction and
  operations of KENETECH. The principals of VAC have significant experience
  in making investments in small-capitalization public companies and
  implementing

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<PAGE>

  value-enhancing strategies such as recapitalizations, spin-offs,
  acquisition programs, management changes, business unit divestitures or
  closing and sale transactions. Although VAC has not reached any definitive
  conclusions as to its future plans for KENETECH, it believes that it will
  use such experience to enhance KENETECH's future value. In addition, VAC
  believes that its access to capital will provide KENETECH with development
  opportunities that it is not currently able to pursue.

     Alternatives. The following information has been provided to Parent,
  Purchaser, VAC and Mr. Lerdal by KENETECH:

     The Special Committee considered various alternatives to the Merger.
  These alternatives consisted of remaining independent and continuing the
  status quo, pursuing a sale to a strategic or financial buyer, making
  strategic acquisitions, and liquidating. These alternatives as analyzed by
  Houlihan Lokey for the purposes of issuing its fairness opinion are
  discussed in detail in "Special Factors--Background of the Transaction;
  Past Contacts, Negotiations and Agreements" and "--Reports, Opinions,
  Appraisals and Negotiations--Opinion of Houlihan Lokey." Before determining
  that the proposed Merger Agreement and the transactions contemplated
  thereby were fair to and in the best interests of KENETECH and its
  stockholders, and recommending that the Board approve and declare advisable
  the Merger Agreement and the transactions contemplated thereby, the Special
  Committee considered the following with respect to the alternatives:

    .  With respect to the alternative of attempting to sell KENETECH to a
       strategic buyer or a financial buyer, the Special Committee
       considered the fact that no other bidder had come forward since
       KENETECH had announced it was considering strategic alternatives,
       and that the provisions of the Merger Agreement had been negotiated
       so as to not unreasonably deter other bidders from coming forward.

    .  With respect to maintaining the status quo or attempting to make
       strategic acquisitions, the Special Committee believed that, among
       other things, KENETECH did not have the financial resources or
       access to capital to reach critical mass.

    .  With respect to the alternative of liquidating KENETECH, the Special
       Committee noted that Houlihan Lokey, in rendering its fairness
       opinion, had qualitatively considered the liquidation of KENETECH's
       assets and determined that a possible range of resulting per Share
       values was $0.79 to $1.06. Based on the foregoing analysis and the
       uncertainties associated with liquidating KENETECH's assets, the
       Special Committee believed that the alternative of liquidation did
       not appear to be as favorable to KENETECH's stockholders as the
       Offer and the Merger.

     Reasons of Parent, Purchaser, VAC and Mr. Lerdal. Each of Parent,
  Purchaser, VAC and Mr. Lerdal believe that it is in KENETECH's best
  interest to operate as a privately held entity. From 1995 through the end
  of 1998, KENETECH experienced severe liquidity constraints. In an effort to
  relieve such constraints, KENETECH undertook to sell its assets. By the end
  of March 1999, KENETECH had disposed of substantially all its operating
  assets and, by the end of April 1999, had repaid substantially all of its
  indebtedness. As a result of its operating performance, KENETECH had been
  unable to access the public capital markets in recent years and each of
  Parent, Purchaser, VAC and Mr. Lerdal believe that it is unlikely that
  KENETECH could access such markets in the foreseeable future. Accordingly,
  the principal benefit of operating as a public company is not available to
  KENETECH. Similarly, due to the historical and recent market prices of the
  Common Stock and the low trading volume in the Common Stock, each of
  Parent, Purchaser, VAC and Mr. Lerdal believe that it is unlikely that
  KENETECH could use its Common Stock to fund acquisitions. Furthermore, many
  of the project development activities currently conducted by KENETECH are
  highly speculative, require significant capital expenditures and may take
  years to mature. As a privately held entity, KENETECH will be able to make
  decisions that may negatively affect quarterly earnings but that may
  increase the value of KENETECH's assets or earnings over the long-term. In
  a public company setting, it is difficult to make decisions that could
  negatively affect earnings when the result of those decisions could
  significantly reduce per share price.

                                       8
<PAGE>

     In addition, after the Merger, KENETECH will no longer be subject to the
  reporting requirements of the Securities Exchange Act of 1934, as amended
  (the "Exchange Act"), which will allow KENETECH to eliminate the time
  devoted by its management and certain other employees to matters which
  relate exclusively to KENETECH being a publicly held company. "Going-
  private" will also reduce certain other costs which relate to being a
  public company, including the costs of certain accounting, auditing and
  legal activities, the cost of preparing, printing and mailing corporate
  reports and proxy statements, and the expense of a transfer agent.

     These assessments are based upon publicly available information
  regarding KENETECH and VAC's due diligence investigation or knowledge of
  KENETECH and the experience of the principals of VAC in investing in or
  managing public companies generally. While VAC believes that there will be
  significant opportunities associated with its investment in KENETECH, it
  realizes that there are also substantial and significant risks that such
  opportunities may not be fully realized.

     Effects. As a result of the Offer and the Merger, the entire equity
  interest in KENETECH will be owned indirectly by VAC and Mr. Lerdal through
  their ownership of Parent. It is anticipated that following the Merger, VAC
  will own approximately 64.7% of Parent's outstanding common stock and Mr.
  Lerdal will own approximately 35.3% of Parent's outstanding common stock.
  The other stockholders of KENETECH (the "Public Stockholders") will no
  longer have any interest in, and will not be stockholders of, KENETECH, and
  therefore, will not participate in KENETECH's future earnings and potential
  growth. Instead, the Public Stockholders will have the right to receive
  $1.04 in cash, without interest, for each Share held (other than Shares for
  which appraisal rights have been perfected).

     To the extent that Mr. Lerdal receives shares of Parent common stock for
  the Contribution Shares, he will have the ability to participate in
  KENETECH's future earnings and potential growth. However, to the extent
  that Mr. Lerdal receives shares of Parent for the Contribution Shares, he
  will also bear the risk of any decreases in the value of KENETECH. The
  reduction of Mr. Lerdal's ownership percentage from 35.6% of the
  outstanding Shares prior to the consummation of the Offer and the Merger to
  35.3% of Parent shares thereafter will reduce his interest in KENETECH's
  book value as of November 15, 2000 from $9,321,566 prior to the
  consummation of the Offer and the Merger to $9,266,501 thereafter (with no
  adjustment made for goodwill). Likewise, Mr. Lerdal's interest in
  KENETECH's net earnings for the period ending November 15, 2000 will
  decrease from $249,206 prior to the consummation of the Offer and the
  Merger to $247,733 thereafter.

     An equity investment in Parent following the Merger will involve
  substantial risk resulting from the limited liquidity of any such
  investment and the highly speculative nature of KENETECH's project
  development activities. Nonetheless, if KENETECH successfully executes its
  business strategy, the value of such an equity investment could be
  considerably greater than the original cost thereof. See "The Tender
  Offer--Possible Effects of the Offer on the Market for the Shares and
  Exchange Act Registration."

     In addition, the Common Stock will no longer be traded as an over-the-
  counter equity security on the OTC Bulletin Board and price quotations for
  sales of Shares in the public market will no longer be available. The
  registration of the Common Stock under the Exchange Act will terminate and
  KENETECH will no longer file periodic or annual reports. KENETECH's
  officers, directors and the owners of more than 10% of the Common Stock
  will no longer be subject to the short-swing profit provisions of Section
  16(b) of the Exchange Act.

     Plans For KENETECH. Pursuant to the Merger Agreement, upon completion of
  the Offer, we intend to effect the Merger in accordance with the terms and
  conditions of the Merger Agreement.

     The Merger Agreement provides that, effective upon the consummation of
  the Offer, Purchaser will be entitled to designate a number of directors
  (rounded up to the nearest whole number) to the Board in proportion to the
  percentage of the total number of outstanding Shares owned by Parent and
  its affiliates.

                                       9
<PAGE>

     Except as otherwise described in this Offer to Purchase and except for
  the transactions contemplated by the Merger Agreement, we have no current
  plans or proposals which relate to or would result in: (a) an extraordinary
  corporate transaction, such as a merger, reorganization or liquidation
  involving KENETECH; (b) a sale or transfer of a material amount of assets
  of KENETECH; or (c) any other material change in KENETECH's corporate
  structure or business.

     Nevertheless, we may initiate a review of KENETECH and its assets,
  corporate structure, capitalization, operations, properties, policies,
  management and personnel to determine what changes, if any, would be
  desirable following the Merger in order best to organize and coordinate the
  activities of KENETECH and Parent. Furthermore, in connection with our
  ongoing review of KENETECH's long term strategy, we may, in the future,
  consider transactions such as the disposition or acquisition of material
  assets, alliances, joint ventures, other forms of co-operation with third
  parties or other extraordinary transactions affecting KENETECH or its
  operations. To minimize future tax liability, Parent expects to distribute
  to its stockholders the excess cash generated by KENETECH, if any.

   3. Recommendation of the Special Committee and the Board of Directors of
KENETECH; Fairness of the Transaction

   The discussion set forth in "Special Factors--Recommendation of the Special
Committee and the Board of Directors of KENETECH; Fairness of the Transaction"
is hereby amended and supplemented as follows:

   The following information is hereby added to page 14 of the Offer to
Purchase immediately following the sixth bullet point therein:

  .  The Per Share Amount exceeds the book value per Share of KENETECH of
     $0.80 as of June 30, 2000 and $0.79 as of December 31, 1999.

  .  The Per Share Amount exceeds the price per Share of $0.66-$0.85 paid by
     KENETECH in connection with the stock repurchase program and other
     repurchases of Shares, as described in the Offer to Purchase under
     "Special Factors--Background of the Transaction; Past Contacts,
     Negotiations and Agreements" and in "Schedule B" to the Offer to
     Purchase under the heading "Purchase of Shares."

  .  The Special Committee noted that Houlihan Lokey, in rendering its
     fairness opinion, had qualitatively considered the liquidation of
     KENETECH's assets and determined that a possible range of resulting per
     Share values was $0.79 to $1.06. Based on the foregoing analysis and the
     uncertainties associated with liquidating KENETECH's assets, the Special
     Committee believed that the alternative of liquidation did not appear to
     be as favorable to KENETECH's stockholders as the Offer and the Merger.

   The fourth bullet point on page 15 of the Offer to Purchase is hereby
amended and restated in its entirety to read as follows:

  .  Certain members of the Board and KENETECH's management may have
     interests in the Offer and the Merger that are in addition to those of
     KENETECH's other stockholders. For additional information regarding the
     interests of certain members of the Board and KENETECH's management in
     the Offer and the Merger, see "--Interests of Certain Persons in the
     Offer and the Merger."

   4. Position of Parent, Purchaser, VAC and Mr. Lerdal as to the Fairness of
the Offer and the Merger

   The first bullet point on page 17 of the Offer to Purchase is hereby
amended and restated in its entirety to read as follows:

  .  The historical and projected financial performance of KENETECH and its
     financial results, including its current liquidity situation, its recent
     operating losses and highly uncertain nature of its future projected
     performance due to the highly speculative nature of its development
     activities.


                                      10
<PAGE>

   The following information is hereby added to page 17 of the Offer to
Purchase immediately following the last bullet point thereon:

  .  The Per Share Amount represents an amount in excess of the historical
     bid quotations for the Common Stock since at least the beginning of
     1998.

  .  The Per Share Amount represents an amount in excess of the prices paid
     by KENETECH in connection with its previous repurchases of the Common
     Stock since January 1, 1998.

  .  The Per Share Amount represents an amount in excess of the net book
     value per share of $0.80 as of June 30, 2000 and $0.79 as of December
     31, 1999.

  .  During the last two years, KENETECH has not received any firm offers
     relating to a merger or consolidation, sale or other transfer of all or
     a substantial part of its assets or a purchase of its securities that
     would enable the holder to exercise control of KENETECH.

   In consideration of the fairness of the Offer and the Merger to the Public
Stockholders, Parent, Purchaser, VAC and Mr. Lerdal did not consider the
liquidation value of the Common Stock in light of the difficulty associated
with assigning values to the Company's current investments. Although
KENETECH's liquidation value was never quantified, Parent, Purchaser, VAC and
Mr. Lerdal believe that the Per Share Amount is in excess of KENETECH's
liquidation value since KENETECH's principal assets (other than cash and cash
equivalents) would not result in any significant gains on liquidation and most
would likely result in the realization of an amount that is less than their
recorded value.

   5. Interests of Certain Persons in the Offer and the Merger

   The discussion set forth in "Special Factors--Interests of Certain Persons
in the Offer and the Merger" is hereby amended and supplemented as follows:

   The following information is hereby added to page 18 of the Offer to
Purchase immediately following the second full paragraph thereon:

     Dr. Christenson is a defendant in Kohls v. Duthie. If the Merger is
  consummated, the plaintiffs may lose standing to pursue the action. The
  Board considered Dr. Christenson's status as a defendant in Kohls v. Duthie
  when he was appointed to the Special Committee. The Special Committee again
  considered this fact during its deliberations, considered the indemnity and
  exculpatory rights of Dr. Christenson, and, based upon the advice of PAC,
  determined that the plaintiffs were unlikely to succeed. Accordingly, the
  Board and the Special Committee concluded that Dr. Christenson's status as
  a defendant would not influence his objectivity or compromise his duties
  and obligations as a member of the Special Committee in any material
  respect. Dr. Christenson's status as a defendant in the action was a factor
  considered by the Special Committee in insisting as a condition to
  KENETECH's obligation to consummate the potential acquisition that at least
  a majority of the outstanding shares, other than the shares held by Mr.
  Lerdal, be tendered in the Offer. For additional information regarding this
  pending litigation, see "Certain Legal Matters and Regulatory Approvals"
  included in this Supplement.

   The sixth paragraph on page 18 of the Offer to Purchase is hereby amended
and restated in its entirety to read as follows:

     It is anticipated that immediately following the Merger VAC will own
  865,214 shares of Parent common stock, or approximately 64.7% of the
  outstanding common stock, and Mr. Lerdal will own 472,803 shares of Parent
  common stock, or approximately 35.3% of the outstanding common stock. Such
  ownership of shares will represent all of the outstanding shares of Parent
  common stock.

                                      11
<PAGE>

   6. Reports, Opinions, Appraisals and Negotiations

   The discussion set forth in "Special Factors--Reports, Opinions, Appraisals
and Negotiations" is hereby amended and restated in its entirety to read as
follows:

   The following information (other than the information concerning Parent,
Purchaser or VAC, including the information set forth under the heading
"Astoria Viability Report") has been provided to Purchaser by KENETECH:

Opinion of Houlihan Lokey

   The Special Committee retained Houlihan Lokey to assist it in evaluating
the terms of the Offer and the Merger and to render an opinion as to whether
the consideration to be received by KENETECH's stockholders, except Mr.
Lerdal, in connection with the Offer and the Merger, is fair to such
stockholders from a financial point of view. At the October 25, 2000 meeting
of the Special Committee, Houlihan Lokey presented its analysis as hereinafter
described and delivered its oral opinion (subsequently confirmed in writing)
that, as of such date and based upon and subject to the assumptions made,
procedures followed, matters considered, and limitations on the review set
forth therein and described to the Special Committee, the consideration to be
received by KENETECH's stockholders (except Mr. Lerdal) in connection with the
Offer and the Merger is fair to such stockholders from a financial point of
view.

   The preparation of a fairness opinion is a complex process and is not
necessarily conducive to partial analysis or summary description. The
following is a brief summary and general description of the valuation
methodologies and approaches utilized by Houlihan Lokey in its evaluation of
KENETECH in connection with the Offer and the Merger, but does not purport to
be a complete statement of the analyses and procedures applied, the judgments
made or the conclusions reached by Houlihan Lokey, nor does it purport to be a
complete description of its presentation. Houlihan Lokey believes, and so
advised the Special Committee and the Board, that its analyses must be
considered as a whole and that selecting portions of its analyses and of the
factors considered by it (without considering all factors and analyses) could
create an incomplete view of the process underlying Houlihan Lokey's analyses
and opinions.

   The complete text of Houlihan Lokey's written opinion as presented to the
Special Committee and the Board is attached as Annex A to the Offer to
Purchase. The summary of the opinion set forth below is qualified in its
entirety by reference to the full text of such opinion. Stockholders are urged
to read such opinion carefully in its entirety for a description of the
procedures followed, the factors considered, the assumptions made, and the
limitations on the analysis undertaken by Houlihan Lokey. Houlihan Lokey's
written opinion is for the information and assistance of the Special Committee
and the Board, and does not constitute a recommendation as to whether any
holder of Common Stock should accept the Offer or as to how any holder of
Common Stock should vote with respect to the Merger. A copy of the
presentation Houlihan Lokey gave to the Special Committee and the Board is
attached as an exhibit to the Schedule TO. Houlihan Lokey has consented to the
inclusion of its opinion as an attachment to the Offer to Purchase and the
Schedule 14D-9 and to the references to its opinion contained therein and in
this Supplement.

   Houlihan Lokey's opinion does not address the Special Committee's, the
Board's or KENETECH's underlying business decision to proceed with the Offer
and the Merger. Houlihan Lokey has not been requested to, and did not,
participate in the process to explore strategic alternatives for KENETECH nor
did it actively solicit third party indications of interest in acquiring all
or any part of KENETECH.

   In connection with the preparation of its opinion, Houlihan Lokey made such
reviews, analyses and inquiries as its representatives deemed necessary and
appropriate under the circumstances. Among other things, Houlihan Lokey:

  .  reviewed KENETECH's annual reports on Form 10-K for the fiscal years
     ended 1995 through 1999, the quarterly reports on Form 10-Q for the two
     quarters ended June 30, 2000 and KENETECH's

                                      12
<PAGE>

     financial statements for the period ended September 30, 2000, which
     KENETECH's management has identified as being the most current financial
     statements available;

  .  met with certain members of KENETECH's management, auditors and tax
     advisors, and management of Astoria Energy, LLC, an electric generating
     company in which KENETECH has invested funds on a minority interest
     basis, to discuss the operations, financial condition, future prospects
     and projected operations and performance of KENETECH and Astoria Energy,
     LLC, respectively;

  .  discussed the operations, financial condition, future prospects and
     projected operations and performance of certain companies in which
     KENETECH has invested (the "Company Investments") with KENETECH's
     management and certain members of the senior management of various
     Company Investments;

  .  reviewed the Merger Agreement and the letter from KENETECH, dated
     October 25, 2000 (the "Company Letter");

  .  reviewed financial statements and forecasts and projections for certain
     of the Company Investments;

  .  reviewed the historical market prices and trading volume for KENETECH's
     Common Stock;

  .  reviewed certain other publicly available financial data for certain
     companies that Houlihan Lokey deemed comparable to KENETECH and the
     Company Investments;

  .  reviewed various documents relating to KENETECH and the Company
     Investments, including publicly-filed applications to state regulatory
     agencies relating to electric generating facilities, loan agreements,
     credit agreements, security agreements, limited guarantees, warrant
     purchase agreements, partnership agreements, business plans, insurance
     policies and related business correspondence;

  .  reviewed various documents provided by counsel to the Special Committee
     relating to the cause of action filed in the Delaware Court of Chancery
     styled Kohls v. Duthie, et at., and relied on the views expressed by
     counsel to the Special Committee with respect to it; and

  .  conducted such other studies, analyses and inquiries as Houlihan Lokey
     deemed appropriate.

   In assessing the fairness of the consideration to KENETECH's stockholders
(other than Mr. Lerdal) in the Offer and the Merger, Houlihan Lokey
independently valued KENETECH and the Company Investments using widely
accepted valuation methodologies. The consideration to be paid by Purchaser in
the Offer and the Merger was determined through negotiations between the
Special Committee and Purchaser. Houlihan Lokey assisted the Special Committee
in evaluating the terms of the Offer and the Merger.

 Assessment of KENETECH's Stock Price

   Houlihan Lokey analyzed the trading volume and the trading prices of the
Common Stock over the past twelve months. Based on these analyses, Houlihan
Lokey observed that: (i) KENETECH's market capitalization is small; (ii) the
Common Stock is thinly traded; and (iii) KENETECH has no analyst coverage.

 Analysis of Control Premiums

   The analysis of control premiums involved the application of control
premium evidence using a comparable transactions approach to KENETECH's
unaffected stock price. The unaffected stock price for KENETECH is considered
to be the closing trading price for the five days prior to the initial public
announcement of the Merger Agreement. KENETECH's largest investments are in
the power generation industry. Therefore, Houlihan Lokey examined the control
premiums in the following broad categories: the electric, gas, water and
sanitary services industry, the energy services industry, and all industries.
Houlihan Lokey examined these broad industry classifications as opposed to
reviewing any specific transaction. The control premium comparables for the
latest twelve-month period included:

  .  one transaction in the energy services industry (as further described in
     Exhibit A attached hereto);

                                      13
<PAGE>

  .  twenty-two transactions in the electrical, gas, water and sanitary
     industry (as further described in Exhibit A attached hereto); and

  .  823 U.S. acquisitions overall (a detailed schedule of which has been
     filed as an exhibit to the Schedule TO),

and such control premiums were 23.0%, 33.3% and 40.5%, respectively. Applying
this range of control premiums to the unaffected stock price of KENETECH
yielded an implied value range for the Common Stock of $0.87 to $1.00 per
Share. Based on the unaffected stock price of KENETECH and the Per Share
Amount of $1.04, the implied control premium is 46.5%.

 Adjusted Net Asset Value Approach

   As part of its analysis, Houlihan Lokey completed an independent valuation
of KENETECH using the adjusted net asset value approach. This was the primary
methodology used by Houlihan Lokey to value KENETECH. The adjusted net asset
value approach focuses on individual asset and liability values, as reported
on KENETECH's balance sheet, and as adjusted to fair market value. This going-
concern approach is appropriate in instances where the subject company invests
heavily in tangible assets, identifiable assets and investments, or where
operating earnings are insignificant relative to the value of the underlying
assets.

   KENETECH's assets consisted primarily of cash, traded debt securities,
advances and various investments (which are principally minority interest
investments in privately-held companies and investments in venture funds).
Cash and traded debt securities were adjusted to reflect cash outflows
subsequent to the September 30, 2000 balance sheet date and were otherwise
valued at book value. Advances and the Company Investments were valued using
the prior transactions and discounted cash flow approaches (which approaches
are described in more detail below).

   KENETECH's liabilities consisted primarily of accounts payable, accrued
liabilities and other long-term liabilities. The accounts payable and accrued
liabilities were adjusted to reflect post-balance sheet transactions and were
otherwise valued at book value. The Deferred Benefit for Deconsolidated
Subsidiary Losses liability (reported in the long-term liabilities section)
was adjusted to market value based on discussions with KENETECH's advisors and
by using the discounted cash flow approach.

   Houlihan Lokey examined the assets and liabilities on the most current
balance sheet available and adjusted the reported value, where appropriate, to
reflect a range of the fair market values of such assets or liabilities. The
aggregate market value of the liabilities was subtracted from the aggregate
fair market value of the assets to arrive at the adjusted net asset value.
Further adjustments were made to net asset value to deduct the present value
of the costs of managing the assets and to deduct the associated taxes on
appreciated assets, as determined in Houlihan Lokey's valuation.

   One or both of the following two approaches (the prior transactions
approach and the discounted cash flow approach) were used to arrive at
indications of fair market value for each of the Company Investments. From
these two approaches, a range of indicated fair market values was determined
for each of the Company Investments. The reported book value for such Company
Investments was then adjusted to reflect the concluded range of fair market
values for each of the Company Investments. In this manner, Houlihan Lokey
adjusted the reported book value of the Company Investments and other assets
to fair market value and then aggregated the overall adjusted market value of
KENETECH's assets (as discussed above). A discussion of these valuation
approaches follows.

 Prior Transactions Approach

   The prior transactions approach examines prior stock transactions for the
companies or securities being valued. This approach was highly relevant to
most of the Company Investments for which no public market

                                      14
<PAGE>

existed and because most of KENETECH's investments were made in the nine
months prior to the date of Houlihan Lokey's opinion. The prior transactions
approach demonstrates what a third party might be willing to pay for the
securities of a company in an arms-length transaction. Based on discussions
with KENETECH's management and the management of several of the Company
Investments, Houlihan Lokey calculated implied equity values for select
Company Investments based on prior rounds of financing or capital raised, and
third party indications of interest in such Company Investments. In valuing
each of the Company Investments, the prior transactions approach was
considered.

 Discounted Cash Flow Approach

   The discounted cash flow approach utilizes projections prepared by the
respective managements of certain of the Company's Investments, and discounts
such projections of future earnings to the present. Specifically, Houlihan
Lokey received the following:

  .  SCS Energy, LLC provided Houlihan Lokey with cash flow projections with
     regard to certain aspects of Astoria Energy LLC's future business
     operations.

  .  OSB Chateaugay LLC's management provided Houlihan Lokey with cash flow
     projections with regard to certain aspects of its future business
     operations.

  .  Sage Systems, Inc.'s management also provided Houlihan Lokey cash flow
     projections with regard to certain aspects of its future business
     operations.

   The projected cash flows were analyzed on a "leveraged" basis (after cash
payments to interest-bearing debt investors) in order to develop a valuation
for such investments. A provision for the value of these Company Investments
at the end of the forecast period, or terminal value, based on after-tax
earnings was also made. The present value of the interim cash flows and the
terminal value were determined using a risk-adjusted rate of return or
"discount rate." This discount rate, in turn, was developed through an
analysis of rates of return on alternative investment opportunities in
companies with similar risk characteristics as the Company Investments being
valued. In determining the value of certain Company Investments using the
discounted cash flow approach, Houlihan Lokey utilized the exit multiple
method by capitalizing the earnings for the final projection period at an
appropriate price-to-earnings multiple to determine the terminal value.
Houlihan Lokey used the discounted cash flow approach for certain of the
Company Investments for which forecasts were obtained from management.

 Summary

   The indicated ranges of values for KENETECH's investments analyzed by
Houlihan Lokey, pursuant to the approaches described above, is attached hereto
as Exhibit B. Also, based on the approaches described above, the per Share
equity value of KENETECH was in the range of $0.96 to $1.13.

 Fairness Analysis

   To determine the fairness of the consideration to KENETECH's stockholders
(other than Mr. Lerdal) from a financial point of view, Houlihan Lokey
reviewed the Per Share Amount to be paid in the Offer and the Merger. Houlihan
Lokey concluded that the Per Share Amount of $1.04 per share was within the
concluded per Share equity value range of $0.96 to $1.13.

 Assessment of KENETECH's Strategic Alternatives to the Offer and the Merger

   In evaluating the fairness of the consideration to KENETECH's stockholders
(other than Mr. Lerdal), from a financial point of view, Houlihan Lokey
qualitatively considered the expected value to the stockholders of completing
the Offer and the Merger and certain alternatives to the Offer and the Merger.

   In the course of working for the Special Committee, Houlihan Lokey held
discussions with KENETECH's representatives and reviewed the materials and
information provided by KENETECH with respect to

                                      15
<PAGE>

KENETECH's strategic alternatives and, for purposes of issuing an opinion,
considered the following strategic alternatives:

  .  maintaining the status quo;

  .  sale of KENETECH to a strategic buyer;

  .  strategic acquisitions by KENETECH;

  .  sale of KENETECH to a financial buyer; and

  .  liquidation.

   The assessment of strategic alternatives included a qualitative assessment
of the valuation impact of the Offer and the Merger relative to the
alternatives considered by Houlihan Lokey. The analysis did not quantify the
valuation impact because, in the opinion of Houlihan Lokey, it was not
feasible to so quantify this impact (due to the significant number of non-
quantifiable variables).

   Houlihan Lokey's qualitative analysis of KENETECH maintaining status quo in
its operations considered the following factors: that its stockholders would
retain the upside and the risk of KENETECH's operations; that KENETECH would
continue to operate and invest in power related development projects, and
perhaps non-power related investments for which KENETECH has little historical
experience; that KENETECH's investment in the Astoria Energy, LLC project is
subject to significant milestone risks; that the usefulness of KENETECH's
existing NOL carryforwards is limited by its limited profitability and would
be useful largely in the context of asset sales; that KENETECH has a
significant contingent long term liability on its balance sheet that KENETECH
and its advisors reviewed and considered to be appropriately provided for
under GAAP; that Houlihan Lokey relied on KENETECH advisors in determining the
value of this liability; that the impact of Kohls v. Duthie is not entirely
clear; and, finally, that KENETECH's shares are thinly traded.

   Houlihan Lokey's qualitative analysis of the sale of KENETECH to VAC
considered, among the other issues discussed in this filing, the following
factors: that VAC's Offer provides liquidity to KENETECH's stockholders at a
substantial premium to the current trading price of KENETECH's stock; that VAC
would assume the risk of all liabilities and upside return of KENETECH's
investments; and that the Offer is all cash, significantly reducing financing
risk.

   Houlihan Lokey's qualitative analysis of the sale of KENETECH to another
strategic buyer considered the following factors: that there are relatively
few strategic buyers for a group of assets as diverse in nature as KENETECH's;
that KENETECH's most significant strategic asset is the Astoria Energy, LLC
project and discussions with likely strategic acquirors with respect to this
asset have been preliminary, with no indication of value or ownership; that
the time required to find an alternative buyer and to secure a better offer
for KENETECH is uncertain; that KENETECH has not recently received other
indications of interest, either orally or in written form, prior to the VAC
Offer; that KENETECH has publicly disclosed that it is evaluating all
strategic alternatives available to it; that KENETECH has a substantial
contingent liability on its balance sheet that may make it unattractive to
certain potential buyers; and that all of KENETECH's investments are minority
interest investments in privately held entities, which may also make it
unattractive to certain potential buyers.

   Houlihan Lokey's qualitative analysis of KENETECH with respect to possible
strategic acquisitions considered that, as size is becoming an increasingly
more important factor in the ability to compete in the independent power
industry, KENETECH does not have the resources to be able to effect sufficient
strategic acquisitions to reach critical mass.

   Houlihan Lokey's qualitative analysis of the sale of KENETECH to a
financial buyer considered the following factors: that KENETECH has diverse
minority investments in privately held entities, which may make it
unattractive to certain potential buyers; that financial buyers may be
interested in the speculative nature of the Astoria Energy, LLC investment;
that KENETECH has a substantial contingent liability on its balance sheet that

                                      16
<PAGE>

may make it unattractive to certain potential buyers; that KENETECH publicly
disclosed that it is evaluating its strategic alternatives; that KENETECH has
not recently received other indications of interest, either orally or in
written form, prior to the VAC Offer; and that the time required to find an
alternative buyer and to secure a better offer for KENETECH is uncertain.

   The final alternative Houlihan Lokey qualitatively considered, the
liquidation of KENETECH's assets, resulted in a likely per share value lower
than the consideration offered by VAC, and did not therefore appear to
maximize stockholder value.

   In connection with the preparation and delivery of its opinion to the
Special Committee and the Board, Houlihan Lokey performed a variety of
financial and comparative analyses, as described above. The preparation of a
fairness opinion involves various determinations as to the most appropriate
and relevant methods of financial and comparative analysis, and the
application of those methods to the particular circumstances. Furthermore, in
arriving at its opinion, Houlihan Lokey did not attribute any particular
weight to any analysis or factor considered by it, but rather made qualitative
judgments as to the significance and relevance of each analysis and factor.
Accordingly, Houlihan Lokey believes that its analyses must be considered as a
whole and that considering any portion of such analyses and factors, without
considering all analyses and factors, could create a misleading or incomplete
view of the process underlying its opinion. In its analyses, Houlihan Lokey
made numerous assumptions with respect to industry performance, general
business and economic conditions and other matters, many of which are beyond
the control of KENETECH.

   In arriving at its opinion, Houlihan Lokey relied upon and assumed, without
independent verification, that the financial forecasts and projections
provided to it were reasonably prepared and reflected the best currently
available estimates of the future financial results and condition of KENETECH
and the Company Investments, where applicable. Houlihan Lokey also assumed
that, except to the extent provided for in the Company Letter, there had been
no material change in the assets, financial condition, business or prospects
of KENETECH and the Company Investments, where applicable, since the date of
the most recent financial statements made available to Houlihan Lokey.
Houlihan Lokey did not independently verify the accuracy and completeness of
the information supplied to it with respect to KENETECH and the Company
Investments, and did not assume any responsibility with respect to such
information. Houlihan Lokey did not make any physical inspection or
independent appraisal of any of the properties, assets or liabilities of
KENETECH and the Company Investments. Houlihan Lokey's opinion was necessarily
based on business, economic, market and other conditions as they existed and
could be evaluated by it at the date of its opinion letter. Accordingly,
although subsequent developments may affect its opinion, Houlihan Lokey has
not assumed the obligation to update, revise or reaffirm its written opinion
dated as of October 25, 2000.

   Houlihan Lokey's opinion and presentation are directed to the Special
Committee and the Board, address only the fairness of the consideration to be
received by KENETECH's stockholders (other than Mr. Lerdal) in the Offer and
the Merger and do not address the relative merits of the Offer and the Merger,
any other matter provided for or contemplated by the Merger Agreement or any
other transaction that may have been available as an alternative to the Offer
and the Merger, whether or not any such alternative could be or could have
been achieved, or the terms upon which any such alternative transaction could
be or could have been achieved. Further, Houlihan Lokey's opinion addresses
only issues related to the fairness, from a financial point of view to
KENETECH's stockholders (except Mr. Lerdal), of the consideration to be
received, and Houlihan Lokey does not express any views on any other terms of
the Merger Agreement, or any other agreement. In addition, Houlihan Lokey has
assumed that in the course of obtaining the necessary regulatory and third
party consents for the Offer and the Merger, no delay or restrictions will be
imposed that will have a material adverse effect on the contemplated benefits
of the Offer and the Merger.

   The opinion of Houlihan Lokey and its presentation to KENETECH's Special
Committee and the Board constituted only one of a number of factors taken into
consideration by the Special Committee and the Board in making their
respective recommendations and determinations to approve the Merger Agreement
and the

                                      17
<PAGE>

transactions contemplated thereby, including the Offer and the Merger.
Houlihan Lokey's opinion and presentation do not constitute a recommendation
to the Special Committee, the Board or any stockholder of KENETECH as to
whether the stockholders should tender their shares in the Offer or how the
Special Committee, the Board or the stockholders should vote with respect to
any matter relating to the Offer and the Merger, and do not address the
underlying business decisions of the Special Committee and the Board to enter
into the Merger Agreement and to consummate the transactions contemplated
thereby, including the Offer and the Merger.

   Houlihan Lokey is a nationally recognized investment banking firm with
special expertise in, among other things, valuing businesses and securities
and rendering fairness opinions. Houlihan Lokey is continually engaged in the
valuation of businesses and securities in connection with mergers and
acquisitions, leveraged buyouts, private placements of debt and equity,
corporate reorganizations, employee stock ownership plans, corporate and other
purposes. The Special Committee selected Houlihan Lokey because of its
industry experience and expertise in performing valuation and fairness
analyses. Houlihan Lokey does not beneficially own, nor has it ever
beneficially owned, any interest in KENETECH.

   Materials summarizing Houlihan Lokey's analyses were presented to the
Special Committee and the Board on October 25, 2000. Parent has filed these
materials with the Commission as an exhibit to the Schedule TO. Copies of
these materials are available for inspection and copying at KENETECH's
principal executive offices, during regular business hours, by any interested
KENETECH stockholder or representative who has been so designated in writing.
You may also obtain these materials from the SEC in the same manner as set
forth for KENETECH's SEC filings in "The Tender Offer--Certain Information
Concerning KENETECH."

 Fees and Expenses

   The Special Committee retained Houlihan Lokey pursuant to a letter
agreement, dated August 24, 2000. The Special Committee retained Houlihan
Lokey to assist it in evaluating the terms of the Offer and the Merger and to
render an opinion as to the fairness of the consideration to be received by
KENETECH's stockholders (except for Mr. Lerdal) in connection with the
proposed transaction and, additionally, to assist the Special Committee in
reviewing and negotiating the financial structure and terms of the Offer and
the Merger, and to provide assistance in connection with defining, from a
financial point of view, strategic and financial objectives. Pursuant to the
engagement letter, KENETECH agreed to pay Houlihan Lokey $350,000 for its
services. KENETECH made a partial payment of $150,000 when it signed the
engagement letter, and the remaining $200,000 was paid shortly after Houlihan
Lokey issued its opinion on October 25, 2000. KENETECH also paid Houlihan
Lokey's travel and out-of-pocket expenses (including reasonable fees and
expenses of legal counsel) through October 30, 2000. KENETECH also agreed in
the letter agreement to indemnify Houlihan Lokey and its employees, agents,
officers, shareholders and persons who control Houlihan Lokey against certain
liabilities, including liabilities under the federal securities laws, relating
to or arising out of Houlihan Lokey's engagement. In June 1996, Houlihan Lokey
was retained by an unofficial committee of KENETECH's 12 3/4% senior secured
noteholders (which notes were satisfied and discharged in 1998) to provide
financial advisory services for the benefit of such committee and Houlihan
Lokey received compensation for such services. Although KENETECH was a party
to the agreement between the unofficial committee and Houlihan Lokey, this
past engagement is unrelated to the Offer and the Merger.

Astoria Viability Report

   In connection with VAC's due diligence investigations of KENETECH, VAC
retained Navigant Consulting, Inc. ("Navigant") to generate a report assessing
the feasibility of developing the proposed Astoria Energy Project, a 1,000 MW
natural gas-fired combined cycle facility to be located near New York City
(the "Astoria Project"). KENETECH currently is a party to funding and
participation agreements with Astoria Energy, LLC with respect to the Astoria
Project. The Astoria Project would be located adjacent to the existing Astoria
Generation Station, now owned by Orion Power Holdings, in Queens, New York.
The Astoria Project is projected

                                      18
<PAGE>

to enter commercial operation in 2003 with the output being sold into the
regional power market, either through bilateral contract arrangements or spot
sales. In general, the report provided an overview of the New York bulk power
market; an assessment of the Astoria Project, based on information contained
in its application to the New York Public Service Commission ("PSC") for the
necessary permits to begin the construction of the facility; and a market
price forecast and related financial assessment for the project for several
likely outcomes. In addition, Navigant provided an assessment of the proposed
fuel supply plan for the project and a benchmark of the capital cost for the
construction of the project.

   The report concluded that the New York power market has undergone
significant change as historically integrated utility functions have been
unbundled, and the generation and power supply components have been
deregulated and opened to competitive forces, which has fundamentally changed
the dynamics governing the revenue streams that will be earned by merchant
power generation resources such as the Astoria Project. The focus of
Navigant's analysis was to assess the feasibility of several aspects of the
project and to provide a projection of revenues that the Astoria Project will
likely earn for sales into the New York City area of the New York power
market. This projection was prepared based on market fundamentals in the
context of the market transformation that has taken place and will continue to
evolve within New England. The report documented the methodology/approach,
underlying assumptions, and results of Navigant's analysis. Navigant's
analysis was based on regional demand and energy forecasts, actual utility
hourly load profiles, fuel price forecasts, generating plant ratings and other
pertinent generating unit operating parameters.

   Navigant's due diligence assessment of the Astoria Project was broad,
covering many areas associated with the project's development. No significant
limitations were placed on Navigant's scope of investigation or analysis. As a
result of its analysis, Navigant reached the following conclusions as they
relate to the New York energy market and the Astoria Project:

  .  Based on the implementation of restructuring in the New York Power
     market, the state has been subdivided by the PSC into 11 transmission
     zones, reflecting significant transmission limitations across the
     system. The Astoria Project is located in a zone that includes New York
     City.

  .  The New York power market has been restructured to include a spot energy
     market that is determined based on locational-based marginal pricing. As
     such, the spot market transactions are settled at the market-clearing
     price for numerous points on the transmission system, reflecting the
     different marginal costs of supplying energy at various locations when
     the transmission system is constrained. Based on the significant
     transmission constraints that exist between Astoria's zone and other
     zones, the energy prices in the New York City area are somewhat higher
     than most other areas in the state, reflecting older, more expensive,
     and less efficient generation setting the clearing price.

  .  Reliability requirements established by the New York State Reliability
     Council ("NYSRC") have established locational-based capacity
     requirements for the New York City and Long Island regions. These
     reliability requirements create an immediate need for new capacity
     within the zones covering New York City, and provide a significant
     penalty for not meeting this requirement.

  .  The proposed Astoria Project was projected by Navigant to earn an after-
     tax return of between 13% and 19%. However, this estimate was a function
     of future market pricing, fuel prices, locational-based installed
     capacity requirements, and the amount and timing of new entrants within
     Astoria's zone.

  .  There is adequate up-stream gas supply available to support the project.
     However, pipeline capacity is currently constrained, and would require a
     commitment for up-stream construction to alleviate these constraints.
     Local pipeline construction to the facility would also be required.
     There are several options available to the project. Unfortunately, each
     will be expensive based on the urban location of the project.

  .  The Astoria Project would be one of the most expensive projects of its
     size in the region. However, the project is believed to be reflective of
     costs for land and construction in the New York City area. The capital
     cost estimate seems to be consistent with another project on Long
     Island; however, more research would need to be done in this area to
     confirm this higher price.

                                      19
<PAGE>

  .  Navigant's initial review identified several areas of concern related to
     environmental modeling, construction of the facility, and construction
     financing. The report noted that the application for construction
     permits filed by Astoria Energy with respect to the Astoria Project was
     found to be incomplete by the PSC, which cited several areas of concern.
     Navigant predicted that the project could correct the deficiencies in
     its application within 6-12 months time.

   Navigant is a global provider of management consulting and professional
services to clients in a wide variety of industries. Navigant is recognized as
having developed significant expertise in the areas of energy, healthcare,
insurance, pharmaceuticals and utilities. VAC selected Navigant for this
assignment based principally on Navigant's reputation in the energy industry
and Mr. Ubben's prior experience with such firm. VAC agreed to pay Navigant a
fee of $10,000 plus 1% of the net proceeds, if any, received by VAC from the
Astoria Project, assuming VAC completed the acquisition of KENETECH.

   The Navigant report was not prepared with a view to public disclosure and
is included herein only because such report was prepared for VAC in connection
with a "going-private" transaction. The conclusions reached by Navigant are
based on numerous assumptions and projections, many of which may turn out to
be incorrect. Navigant's report was prepared for the information and
assistance of VAC only and does not constitute a recommendation as to whether
any holder of Common Stock should accept the Offer or as to how a holder of
Common Stock should vote with respect to the Merger.

   The above summary is qualified in its entirety by references to the
complete text of the report, a copy of which is incorporated herein by
reference and a copy of which had been filed with the Commission as an exhibit
to the Schedule TO to which this Supplement is an exhibit. This report may be
examined and copies may be obtained in the manner set forth in Section 8 of
the Offer to Purchase. In addition, this report will be made available for
inspection and copying at KENETECH's principal executive office during its
regular business hours by any interested Public Stockholder or representative
who has been so designated in writing.

                                      20
<PAGE>

                               THE TENDER OFFER

   1. Terms of the Offer

   The following discussion set forth in "The Tender Offer--Terms of the
Offer" is hereby amended and supplemented as follows:

   The second paragraph on page 25 of the Offer to Purchase is hereby amended
and restated in its entirety to read as follows:

     THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, SATISFACTION OF THE
  MINIMUM CONDITION, AND CERTAIN OTHER CONDITIONS AS SET OUT IN SECTION 12
  BELOW. THE MERGER AGREEMENT AND THE OFFER MAY BE TERMINATED BY PURCHASER
  AND PARENT SHOULD ANY OF THE EVENTS SET FORTH IN SECTION 12 OCCUR. SEE
  SECTION 12.

   The third paragraph on page 25 of the Offer to Purchase is hereby amended
and supplemented by adding the following information at the end thereof:

  If presented with a request to waive the Minimum Condition, KENETECH will
  consider the facts and circumstances at the time of the request. However,
  KENETECH will not approve, and Parent agrees that it will not request that
  KENETECH approve, a reduction in the triggering percentage for the Minimum
  Condition to below 50% in order to ensure that, as a condition to
  KENETECH's obligation to consummate the Offer and the Merger, at least a
  majority of the outstanding shares, other than the shares held by Mr.
  Lerdal, be tendered in the Offer.

   8. Certain Information Concerning KENETECH

   The section referred to as "The Tender Offer--Certain Information
Concerning KENETECH" is hereby amended and supplemented as follows:

   The following information is added before the first paragraph on page 35 of
the Offer to Purchase:

   Preliminary Estimate of Net Cash Flows. In the course of discussions giving
rise to the Merger Agreement, Mr. Lerdal furnished to VAC certain financial
information that was not publicly available. The non-public information
provided by Mr. Lerdal included his preliminary estimate of the net cash he
asserted KENETECH's eight largest investments could generate over the next
four years. KENETECH does not as a matter of course publicly disclose
estimates as to future results. These estimates were not prepared for
publication or with a view to complying with the published guidelines of the
Commission regarding projections or with the American Institute of Certified
Public Accountants guide for Prospective Financial Statements. Such
information is being included in this Supplement solely because it was
furnished to us in connection with the discussions giving rise to the Merger
Agreement. We believe that the information was presented in a manner designed
to persuade us that we should raise our offer price. As a result, we did not
consider the information reliable and did not rely on such information in
ultimately deciding to increase our price offered for the Common Stock.
Furthermore, we believe that the information was incomplete since it did not
address in any comprehensive manner KENETECH's existing contingent
liabilities.

   The independent accountants of KENETECH have neither examined nor compiled
the financial information set forth below and, accordingly, do not express an
opinion or any other form of assurance with respect thereto. The reports of
such independent accountants incorporated by reference in the Offer to
Purchase relate to the historical financial information of KENETECH and do not
extend to the following financial information and should not be read to do so.

   THE INFORMATION SET FORTH BELOW NECESSARILY REFLECTS NUMEROUS ASSUMPTIONS
WITH RESPECT TO GENERAL BUSINESS AND ECONOMIC CONDITIONS AND OTHER MATTERS,
MANY OF WHICH ARE INHERENTLY UNCERTAIN OR BEYOND KENETECH'S OR OUR CONTROL,
MAY NOT BE APPARENT ON THE FACE OF THE

                                      21
<PAGE>

ASSUMPTIONS AND DO NOT TAKE INTO ACCOUNT ANY CHANGES IN KENETECH'S OPERATIONS
OR CAPITAL STRUCTURE WHICH MAY RESULT FROM THE OFFER AND THE MERGER. IN
ADDITION, FACTORS SUCH AS INDUSTRY PERFORMANCE AND REGULATORY AND FINANCIAL
CONDITIONS, WHICH ARE DIFFICULT TO PROJECT, MAY CAUSE THIS INFORMATION OR THE
UNDERLYING ASSUMPTIONS TO BE INACCURATE. IT IS NOT POSSIBLE TO PREDICT WHETHER
THE ASSUMPTIONS MADE IN PREPARING SUCH FINANCIAL INFORMATION WILL BE VALID.
ACCORDINGLY, THERE CAN BE NO ASSURANCE THAT THESE ESTIMATES WILL BE REALIZED,
AND ACTUAL RESULTS MAY PROVE TO BE MATERIALLY HIGHER OR LOWER THAN THOSE
CONTAINED IN THE ESTIMATES. THE INCLUSION OF THIS INFORMATION SHOULD NOT BE
REGARDED AS AN INDICATION THAT WE, KENETECH OR ANYONE ELSE WHO RECEIVED THIS
INFORMATION CONSIDERED IT A RELIABLE PREDICTOR OF FUTURE EVENTS, AND THIS
INFORMATION SHOULD NOT BE RELIED ON AS SUCH. NONE OF PARENT, PURCHASER, VAC OR
ANY OF THEIR RESPECTIVE REPRESENTATIVES ASSUMES ANY RESPONSIBILITY FOR THE
VALIDITY, REASONABLENESS, OR COMPLETENESS OF SUCH FINANCIAL INFORMATION, AND
KENETECH HAS MADE NO REPRESENTATION TO SUCH PARTIES REGARDING SUCH
INFORMATION.

<TABLE>
<CAPTION>
                                                          Realization Period
                                                      --------------------------
                                                       2001    2002   2003  2004
                                                      ------- ------ ------ ----
                                                            (in thousands)
<S>                                                   <C>     <C>    <C>    <C>
Net cash flow(1)..................................... $10,350 $9,950 $1,500 $500
</TABLE>
--------
(1) Represents preliminary estimates of the aggregate net cash return from
    KENETECH's eight largest investments. Assumes operating expenses of $1.0
    million in each of 2001, 2002 and 2003. The estimated net cash flows do
    not give effect to many of KENETECH's existing contingent liabilities.

   9. Certain Information Concerning Purchaser and Parent

   The section referred to as "The Tender Offer--Certain Information
Concerning Purchaser and Parent" is hereby amended and supplemented as
follows:

   The fourth paragraph on page 35 of the Offer of Purchase is hereby amended
and restated in its entirety to read as follow:

     ValueAct Capital Partners, L.P., a limited partnership organized under
  the laws of Delaware, owns the voting equity securities of Parent. Parent's
  equity securities will be owned after the Merger by VAC and Mr. Lerdal, who
  has agreed to contribute the Contribution Shares to Parent. The principal
  executive offices of ValueAct Capital Partners, L.P. are located at One
  Maritime Plaza, Suite 1400, San Francisco, California 94111, and its
  telephone number is (415) 362-3706.

   The following information is added to page 35 of the Offer to Purchase
immediately following the fourth paragraph thereon:

     VA Partners, L.L.C., a limited liability company organized under the
  laws of Delaware, is the sole general partner of ValueAct Capital Partners,
  L.P. The principal executive offices of VA Partners, L.L.C. are located at
  One Maritime Plaza, Suite 1400, San Francisco, California 94111 and its
  telephone number is (415) 362-3706.

   12. Certain Conditions of the Offer

   The section referred to as "The Tender Offer--Certain Conditions of the
Offer" is hereby amended and supplemented as follows:

   The third paragraph on page 43 of the Offer to Purchase is hereby amended
and restated in its entirety as follows:

     Furthermore, notwithstanding any other term of the Offer or the Merger
  Agreement, Purchaser will not be required to accept for payment or, subject
  as aforesaid, to pay for any Shares not theretofore accepted

                                      22
<PAGE>

  for payment or paid for, and may terminate the Offer if, at any time on or
  after the date of the Merger Agreement and before the Expiration Date, any
  of the following conditions exists (other than as a result of any action or
  inaction of Parent or any of its subsidiaries that constitutes a breach of
  the Merger Agreement):

   The first full paragraph on page 44 of the Offer to Purchase is hereby
amended and restated in its entirety to read as follows:

     The foregoing conditions are for the sole benefit of Parent and
  Purchaser and may, subject to the terms of the Merger Agreement, and other
  than with respect to the Minimum Condition (the waiver of which also
  requires the consent of KENETECH), be waived by Parent and Purchaser in
  whole or in part at any time and from time to time in their sole discretion
  prior to the Expiration Date. The failure by Parent or Purchaser at any
  time to exercise any of the foregoing rights will not be deemed a waiver of
  any such right. The waiver of any such right with respect to particular
  facts and circumstances will not be deemed a waiver with respect to any
  other facts and circumstances. Each such right will be deemed an ongoing
  right that may be asserted at any time and from time to time.

   13. Certain Legal Matters and Regulatory Approvals

   The section referred to as "The Tender Offer--Certain Legal Matters and
Regulatory Approvals" is hereby amended and supplemented as follows:

   The following information is added as the final paragraphs of such section:

   Litigation. On November 9, 2000, Robert L. Kohls and Louise A. Kohls (the
"Plaintiffs") moved to file a second amended and supplemental complaint (the
"Second Amended Complaint") in an action pending in the Court of Chancery of
the State of Delaware in and for New Castle County (the "Chancery Court")
styled Kohls v. Duthie, et al. (the "Action"). The Second Amended Complaint
names Gerald R. Morgan, Jr., Michael D. Winn, and KENETECH as additional
defendants. KENETECH previously was a nominal defendant. The first cause of
action of the Second Amended Complaint sets forth all of the allegations and
seeks all of the relief set forth in the Plaintiffs' first amended complaint.
The first cause of action of the Second Amended Complaint is purportedly
brought as a derivative action on behalf of KENETECH. The second cause of
action of the Second Amended Complaint seeks to enjoin preliminary and
permanently the consummation of the Merger Agreement.

   As it pertains to the Merger Agreement, the Second Amended Complaint alleges
in substance the following:

  .  that the Offer and the Merger are the result of an unfair process, and
     will constitute an unfair transaction to the KENETECH stockholders;

  .  that Charles Christenson, one of the members of the Special Committee,
     has, as a defendant in the Action, a personal interest in approving the
     Merger Agreement because the closing of the Merger would eliminate the
     standing of the Plaintiffs to bring the Action, and therefore the
     transactions contemplated by the Merger Agreement were not the product
     of arms-length negotiations, but instead constituted self-dealing;

  .  that because Gerald R. Morgan, Jr., one of the members of the Special
     Committee, has, as the Chief Operating Officer of an entity in which
     KENETECH invests, an interest in pleasing Mr. Lerdal, and because the
     Offer and the Merger provide a unique benefit to Mr. Lerdal in the form
     of a "roll over" of his investment in KENETECH, the process whereby the
     Offer and the Merger were agreed to by KENETECH was unfair;

  .  that the Per Share Amount of $1.04 was the product of an analysis of
     Houlihan Lokey that assumed the Action had no value to KENETECH, failed
     to investigate the Action by contacting the Plaintiffs, failed to
     consider that the Action is scheduled to go to trial in April 2001, and
     failed to evaluate independently the deferred benefit for deconsolidated
     losses, as a result of which the process whereby the Offer and the
     Merger were agreed to by KENETECH was unfair;

                                       23
<PAGE>

  .  that the Per Share Amount of $1.04 fails to properly account for issues
     relating to the deferred benefit for deconsolidated losses and overhead
     costs, as a result of which the Per Share Amount is unfair;

  .  that the Per Share Amount of $1.04 is based on Mr. Lerdal owning the
     Shares that are the subject of the Action, title to which is contested
     by the Action, as a result of which both the process whereby the Offer
     and the Merger were agreed to by KENETECH and the Per Share Amount are
     unfair; and

  .  that the disclosures surrounding the Offer and the Merger contain
     material misstatements and fail to include information necessary to make
     the statements not misleading.

   The Plaintiffs allege that the second cause of action of the Second Amended
Complaint, including the above allegations, is maintainable as a class action,
and that there are questions of law and fact which are common to the KENETECH
stockholders who comprise the class, including: (i) whether the transactions
contemplated by the Merger Agreement are the product of a fair process and
provide a fair price to the stockholders of KENETECH; and (ii) whether the
materials that describe the Offer and the Merger contain any
misrepresentations or fail to disclose material facts which are necessary for
the disclosures that have been made to not be misleading.

   The Plaintiffs request that the Chancery Court: (i) issue a preliminary
injunction enjoining the consummation of the Merger Agreement; (ii) enter a
permanent injunction prohibiting the consummation of the Merger Agreement; and
(iii) award Plaintiffs their attorneys' fees, costs, and other expenses.

   Also on November 9, 2000, the Plaintiffs asked the Chancery Court to hold a
scheduling conference to determine whether to schedule an expedited hearing on
the Plaintiffs' application for a preliminary injunction enjoining the
consummation of the Merger Agreement. On November 13, 2000, the Chancery Court
held a conference and scheduled a hearing on the Plaintiffs' application for a
preliminary injunction for December 5, 2000, at 3:00 p.m. E.S.T.

   KENETECH has been informed that the individual defendants intend to defend
this action vigorously, and, to the extent that it does not involve derivative
claims, KENETECH intends to defend this action vigorously.

   The above summary is qualified in its entirety by reference to the complete
terms of the Notice of Motion and Motion for Leave to File Second Amended and
Supplemental Complaint, copies of which are attached as Exhibit (a)(5)(v) to
Amendment No. 1 to Schedule TO and incorporated by this reference.

   Miscellaneous. Parent, Purchaser and VAC have filed with the Commission a
Tender Offer Statement on Schedule TO, as amended, together with all exhibits
thereto, pursuant to Regulation M-A under the Exchange Act (the "Exchange Act
Rules"), furnishing certain additional information with respect to the Offer
which includes the information required by Schedule 13E-3. In addition,
KENETECH has filed a Solicitation/Recommendation Statement on Schedule 14D-9,
as amended, together with all exhibits thereto, pursuant to Rule 14d-9 of the
Exchange Act Rules setting forth its recommendation with respect to the Offer
and the reasons for such recommendations and furnishing certain additional
related information. Such Schedules and any amendments thereto, including
exhibits, may be inspected and copies may be obtained from the offices of the
Commission in the manner set forth in "THE TENDER OFFER--Section 8. Certain
Information Concerning KENETECH" of the Offer to Purchase (except that they
will not be available at the regional offices of the Commission).

                                          KC MERGER CORP.

November 26, 2000

                                      24
<PAGE>

                                  SCHEDULE A

           Certain Information Concerning Purchaser, Parent and VAC

   The following information is added to page A-1 of the Offer to Purchaser
immediately following the fourth paragraph thereon:

     VA Partners, L.L.C. The General Partner was formed in 2000 for the
  purpose of serving as the sole general partner of ValueAct Capital
  Partners, L.P. The founding members of the General Partner are listed
  above.

                                      A-1
<PAGE>


                                   Exhibit A

             Announced Transactions Between 10/19/99 and 10/18/00

Mergerstat Custom Report
(dated as of October 18, 2000)
<TABLE>
<CAPTION>
                                                              Target     5 Day
Seller                                     Buyer            Industry(1) Premium
------                                     -----            ----------- -------
<S>                             <C>                         <C>         <C>
R&B Falcon Corp                 Transocean Sedco Forex Inc    ES         23.04%

ThermoRetec Corp                Thermo Electron Corp          EGW&SS     33.33%

E'town Corp                     Thames Water PLC              EGW&SS     30.77%

Providence Energy Corp          Southern Union Co             EGW&SS     35.74%

Valley Resources Inc            Southern Union Co             EGW&SS     32.00%

Hyder PLC                       Southern Co/PPL Corp          EGW&SS     29.83%

Virginia Gas Co                 Private Group                 EGW&SS     25.39%

Scherer Healthcare Inc          Private Group                 EGW&SS     42.86%

LG&E Energy Corp                PowerGen PLC                  EGW&SS     58.38%

Virginia Gas Co                 NUI Corp                      EGW&SS     33.33%

Bangor Hydro Electric Co        NS Power Holdings Inc         EGW&SS     73.77%

Niagara Mohawk Power Holdings
Inc                             National Grid Group PLC       EGW&SS     49.02%

Eastern Enterprises             KeySpan Corp                  EGW&SS     27.03%

GZA GeoEnvironmental
Technologies Inc                Futureco Environmental Inc    EGW&SS     16.36%

Entergy Corp                    FPL Group Inc                 EGW&SS      2.35%

GPU Inc                         FirstEnergy Corp              EGW&SS     36.76%

Berkshire Energy Resources      Energy East Corp              EGW&SS     49.02%

Coastal Corp (The)              El Paso Energy Corp           EGW&SS     33.78%

MidAmerican Energy Holdings Co  Berkshire Hathaway Inc        EGW&SS     26.85%

Union Pacific Resources Group
Inc                             Anadarko Petroleum Corp       EGW&SS     77.03%

SJW Corp                        American Water Works Co Inc   EGW&SS     28.64%

CA La Electricidad de Caracas   AES Corp                      EGW&SS    111.11%

IPALCO Enterprises Inc          AES Corp                      EGW&SS     16.93%
</TABLE>

<TABLE>
 <C>                             <S>   <C>  <C>
                                 Median,
                                  Energy
                                  Services.....
                                  23.04%

                                 Median,
                                  Electrical,
                                  Gas, Water &
                                  Sanitary
                                  Services.....
                                  33.33%

</TABLE>

--------
(1) The term "ES" refers to Energy Services and the term "EGW&SS" refers to
    Electrical, Gas, Water & Sanitary Services
<PAGE>

                                   Exhibit B

                     Indicated Ranges of Value to KENETECH

<TABLE>
<CAPTION>
                                                         Indicated Value Range
                                                         ----------------------
                                                            Low        High
                                                         ---------- -----------
<S>                                                      <C>        <C>
ADVANCES:
  Astoria Energy LLC.................................... $8,500,000 $ 9,000,000
  OSB Chateaugay LLC.................................... $1,300,000 $ 2,000,000
  Whinash............................................... $   99,000 $   123,000

DEBT SECURITIES:
  Indosuez Capital Funding VI, Ltd...................... $2,500,000 $ 2,500,000
  ServiSense.com, Inc................................... $  900,000 $   900,000

INVESTMENTS:
  Astoria Energy LLC.................................... $6,500,000 $10,000,000
  Francisco Partners L.P................................ $  840,000 $   840,000
  Draper Atlantic Venture Fund II, L.P.................. $  250,000 $   250,000
  Sage Systems, Inc..................................... $  500,000 $   800,000
  Odin Millennium Partnership, Ltd...................... $1,050,000 $ 1,200,000
  GenPhar, Inc.......................................... $  250,000 $   250,000
  Interactive International Commerce, Ltd............... $  150,000 $   250,000
  BreightBurn Energy Company, LLC....................... $   42,500 $    42,500
</TABLE>
<PAGE>

   Facsimile copies of the Letter of Transmittal will be accepted. The Letter
of Transmittal, certificates for the Shares and any other required documents
should be sent by each stockholder of KENETECH or such stockholder's broker-
dealer, commercial bank, trust company or other nominee to the Depositary as
follows:

                       The Depositary for the Offer Is:
                   ChaseMellon Shareholder Services, L.L.C.

                           By Facsimile Transmission
                       (For Eligible Institutions Only)
                                (201) 296-4293
                     Attention: Reorganization Department

                             Confirm by Telephone:
                                (201) 296-4860

  By Overnight Courier:            By Mail:                   By Hand:
                           Reorganization Department Reorganization Department
Reorganization Department        P.O. Box 3301              120 Broadway
    85 Challenger Road    South Hackensack, NJ 07606         13th Floor
    Mail Stop--Reorg.                                    New York, NY 10271
Ridgefield Park, NJ 07660

                              Other Information:

   Questions or requests for assistance or additional copies of this
Supplement, the Offer to Purchase and the Letter of Transmittal may be
directed to the Information Agent at its telephone number and location listed
below. You may also contact your broker, dealer, commercial bank or trust
company or other nominee for assistance concerning the Offer.

                    The Information Agent for the Offer is:

                           MacKenzie Partners, Inc.

                               156 Fifth Avenue
                           New York, New York 10010
                         (212) 929-5500 (Call Collect)
                      E-Mail: [email protected]
                                      or
                         Call Toll Free (800) 322-2885


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