CUMMINS ENGINE CO INC
SC 13D/A, 1994-01-10
ENGINES & TURBINES
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<PAGE>
 
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- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                               ----------------
 
                                  SCHEDULE 13D
                                     UNDER
                      THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 1)*
 
                               ----------------
 
                          CUMMINS ENGINE COMPANY, INC.
                                (NAME OF ISSUER)
 
                               ----------------
 
COMMON STOCK, PAR VALUE $2.50 PER SHARE                 231021 10 6
     (TITLE OF CLASS OF SECURITIES)                   (CUSIP NUMBER)
 
                               ----------------
 
                                   M.W. MEYER
                                 VICE PRESIDENT
                           AND DEPUTY GENERAL COUNSEL
                                  TENNECO INC.
                                TENNECO BUILDING
                              HOUSTON, TEXAS 77002
                                 (713) 757-2131
                 (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON
               AUTHORIZED TO RECEIVE NOTICES AND COMMUNICATIONS)
                                
                             DECEMBER 29, 1993     
            (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT)
 
                               ----------------
 
  If the filing person has previously filed a statement on Schedule 13G to
report the acquisition which is the subject of this Schedule 13D, and is filing
this schedule because of Rule 13d-1(b)(3) or (4), check the following box. [_]
 
  Check the following box if a fee is being paid with the statement. [_] (A fee
is not required only if the reporting person: (1) has a previous statement on
file reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of less than five percent of such class.
See Rule 13d-7.)
 
  Note: Six copies of this statement, including all exhibits, should be filed
with the Commission. See Rule 13d-1(a) for other parties to whom copies are to
be sent.
 
  *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.
 
  The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
                                      13D
                             CUSIP No. 231021 10 6
                              
                           Page  2  of     Pages     
<TABLE>
 <C>   <S>
  1    NAME OF REPORTING PERSON
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
       Tenneco Inc.
       76-0233548
- ---------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                   (a) [_]
                                                                   (b) [X]
- ---------------------------------------------------------------------------
  3    SEC USE ONLY
- ---------------------------------------------------------------------------
  4    SOURCE OF FUNDS*
       WC
- ---------------------------------------------------------------------------
  5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
       ITEMS 2(d) or 2(e)
                                                                       [_]
- ---------------------------------------------------------------------------
  6    CITIZENSHIP OR PLACE OF ORGANIZATION
       Delaware
- ---------------------------------------------------------------------------
</TABLE>
 NUMBER OF
   SHARES
BENEFICIALLY
  OWNED BY
    EACH
 REPORTING
   PERSON
    WITH
<TABLE>
        <C>   <S>
          7   SOLE VOTING POWER
              -0-
           ---------------------------
          8   SHARED VOTING POWER
              -0-
           ---------------------------
          9   SOLE DISPOSITIVE POWER
              -0-
           ---------------------------
         10   SHARED DISPOSITIVE POWER
              -0-
- --------------------------------------
</TABLE>
<TABLE>
 <C>   <S>
  11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
       -0-
- -----------------------------------------------------------------------------
  12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                         [_]
- -----------------------------------------------------------------------------
  13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
       0.00%
- -----------------------------------------------------------------------------
  14   TYPE OF REPORTING PERSON*
       CO
- -----------------------------------------------------------------------------
</TABLE>
                     * SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
 
                                      13D
                             CUSIP No. 231021 10 6
                              
                           Page  3  of     Pages     
<TABLE>
 <C>   <S>
  1    NAME OF REPORTING PERSON
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
       Kern County Land Company
       94-1651111
- ---------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                   (a) [_]
                                                                   (b) [X]
- ---------------------------------------------------------------------------
  3    SEC USE ONLY
- ---------------------------------------------------------------------------
  4    SOURCE OF FUNDS*
       OO
- ---------------------------------------------------------------------------
  5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
       ITEMS 2(d) or 2(e)
                                                                       [_]
- ---------------------------------------------------------------------------
  6    CITIZENSHIP OR PLACE OF ORGANIZATION
       Delaware
- ---------------------------------------------------------------------------
</TABLE>
 NUMBER OF
   SHARES
BENEFICIALLY
  OWNED BY
    EACH
 REPORTING
   PERSON
    WITH
<TABLE>
        <C>   <S>
          7   SOLE VOTING POWER
              -0-
           ---------------------------
          8   SHARED VOTING POWER
              -0-
           ---------------------------
          9   SOLE DISPOSITIVE POWER
              -0-
           ---------------------------
         10   SHARED DISPOSITIVE POWER
              -0-
- --------------------------------------
</TABLE>
<TABLE>
 <C>   <S>
  11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
       -0-
- -----------------------------------------------------------------------------
  12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                         [_]
- -----------------------------------------------------------------------------
  13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
       0.00%
- -----------------------------------------------------------------------------
  14   TYPE OF REPORTING PERSON*
       CO
- -----------------------------------------------------------------------------
</TABLE>
                     * SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
 
                                      13D
                             CUSIP No. 231021 10 6
                              
                           Page  4  of     Pages     
<TABLE>
 <C>   <S>
  1    NAME OF REPORTING PERSON
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
       Case Corporation
       74-1668960
- ---------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                   (a) [_]
                                                                   (b) [X]
- ---------------------------------------------------------------------------
  3    SEC USE ONLY
- ---------------------------------------------------------------------------
  4    SOURCE OF FUNDS*
       OO
- ---------------------------------------------------------------------------
  5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
       ITEMS 2(d) or 2(e)
                                                                       [_]
- ---------------------------------------------------------------------------
  6    CITIZENSHIP OR PLACE OF ORGANIZATION
       Delaware
- ---------------------------------------------------------------------------
</TABLE>
 NUMBER OF
   SHARES
BENEFICIALLY
  OWNED BY
    EACH
 REPORTING
   PERSON
    WITH
<TABLE>
        <C>   <S>
          7   SOLE VOTING POWER
              -0-
           ---------------------------
          8   SHARED VOTING POWER
              -0-
           ---------------------------
          9   SOLE DISPOSITIVE POWER
              -0-
           ---------------------------
         10   SHARED DISPOSITIVE POWER
              -0-
- --------------------------------------
</TABLE>
<TABLE>
 <C>   <S>
  11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
       -0-
- -----------------------------------------------------------------------------
  12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                         [_]
- -----------------------------------------------------------------------------
  13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
       0.00%
- -----------------------------------------------------------------------------
  14   TYPE OF REPORTING PERSON*
       CO
- -----------------------------------------------------------------------------
</TABLE>
                     * SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
 
ITEM 1. SECURITY AND ISSUER.
 
  This statement relates to the common stock, par value $2.50 per share (the
"Common Stock"), of Cummins Engine Company, Inc., an Indiana corporation (the
"Issuer"). The principal executive offices of the Issuer are located at 500
Jackson Street, Columbus, Indiana.
   
  This Amendment No. 1 to Schedule 13D is being filed in accordance with
Section 13(d)(2) of the Securities Exchange Act of 1934, as amended, to report
the transfer by Tenneco Inc. ("Tenneco") of 3,200,000 shares of Common Stock of
the Issuer. The original Schedule 13D was filed on July 30, 1990.     
 
ITEM 2. IDENTITY AND BACKGROUND.
   
  (a)-(c), (f) This statement is being filed by Tenneco Inc. ("Tenneco"), Kern
County Land Company ("Kern County"), and Case Corporation ("Case"; Tenneco,
Kern County and Case are hereinafter referred to collectively as the "Reporting
Persons" and individually as a "Reporting Person"). Each Reporting Person was
incorporated under the laws of the State of Delaware. The principal executive
offices of Tenneco and Kern County are located at 1010 Milam Street, Houston,
Texas 77002, and Case has its principal executive office at 700 State Street,
Racine, Wisconsin 53404.     
   
  Tenneco is a holding company conducting all of its operations through
subsidiaries. The major interests of these subsidiaries are natural gas
pipelines, farm and construction equipment, automotive parts, shipbuilding,
packaging, and chemicals. The name, business address, citizenship and present
principal occupation or employment of each of the directors and executive
officers of Tenneco are set forth in Schedules I and II hereto.     
   
  Kern County is a holding company conducting all of its operations through
subsidiaries. Its principal subsidiary is Case, which is engaged in the
manufacture and sale of farm and construction equipment. It also has
subsidiaries that are engaged in the sale of real estate. The name, business
address, citizenship and present principal occupation or employment of each of
the executive officers and directors of Kern County are set forth in Schedules
III and IV.     
   
  Case, directly and through its subsidiaries, manufactures and sells a full
line of farm equipment and light and medium-sized construction equipment. The
name, business address, citizenship and present principal occupation or
employment of each of the executive officers and directors of Case are set
forth in Schedules V and VI.     
   
  (d) and (e) During the past five years, neither Tenneco, Kern County or Case
nor, to their knowledge, any of their directors or executive officers has been
(i) convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors) or (ii) a party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and as a result of such
proceeding was or is subject to a judgment, decree or final order enjoining
future violations of, or prohibiting or mandating activities subject to,
federal or state securities laws or finding any violation with respect to such
laws.     
 
ITEM 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.
   
  On or about July 16, 1990, Tenneco paid to the Issuer, out of its working
capital, the sum of $100,000,000 for one share of the Issuer's Series T
Convertible Preference Stock (the "Series T Preference Stock"). Effective
September 12, 1990, the Series T Preference Stock was converted into 1,600,000
shares of Common Stock, and on October 12, 1993, Tenneco received an additional
1,600,000 shares of Common Stock pursuant to a two-for-one stock split effected
by the Issuer. The 3,200,000 shares of Common Stock acquired by Tenneco are
herein referred to as the "Cummins Stock".     
 
ITEM 4. PURPOSE OF TRANSACTION.
   
  Tenneco acquired the Series T Preference Stock for investment under an
Investment Agreement with the Issuer dated as of July 16, 1990 (the "Investment
Agreement"). A copy of the Investment Agreement has been filed as Exhibit 1 to
this statement and is incorporated herein by reference. The description herein
of the Investment Agreement is qualified in its entirety by the complete text
of Exhibit 1.     
 
                                       1
<PAGE>
 
   
  On or about July 13, 1990, the Issuer amended the Rights Agreement (the
"Rights Agreement") (Exhibit 2 to this statement and incorporated herein by
reference), dated as of September 9, 1986, between the Issuer and the Rights
Agent (as defined therein) to permit the acquisition by Tenneco of Common Stock
of the Issuer as provided for in the Investment Agreement and agreed to make
additional amendments thereto as provided in Section 3.1(h) of the Investment
Agreement.     
   
DISPOSITION OF THE CUMMINS STOCK     
   
  By the Consent and Amendment to Investment Agreement between Tenneco and the
Issuer dated as of December 29, 1993 (the "Consent and Amendment"), a copy of
which is filed as Exhibit 3 to this statement and is incorporated herein by
reference, the Issuer consented to the following transfers of the Cummins Stock
proposed by Tenneco:     
     
    1. From Tenneco to Kern County, a wholly-owned subsidiary of Tenneco;
         
    2. From Kern County to Case, a wholly-owned subsidiary of Kern County;
         
    3. From Case to the Bankers Trust Company, as trustee for the account of
  the Case Corporation Pension Plan for Hourly-Paid Employees (the "Plan");
  and     
     
    4. From the Bankers Trust Company, as trustee for the account of the
  Plan, to Bankers Trust Company, as trustee of the Tenneco Inc. General
  Employee Benefit Trust (the "GEBT").     
   
  The Plan is a defined benefit pension plan for eligible hourly employees of
Case. The GEBT is a trust which holds assets of the Plan and all other defined
benefit pension plans maintained by Tenneco and its domestic subsidiaries.     
   
  On December 29, 1993, the transfers of the Cummins Stock contemplated by the
Consent and Amendment were made, as a result of which the GEBT became the owner
of the Cummins Stock. Simultaneously with each transfer described above, the
respective transferee executed and delivered to Tenneco and the Issuer a
Joinder in Agreement, copies of which are filed as Exhibits 4 through 7 to this
Statement and are incorporated herein by reference. The Issuer is amending the
Rights Agreement to permit the contribution by Tenneco of the Cummins Stock as
provided for in the Consent and Amendment. The form of the amendment has been
filed with this statement as Exhibit 8 and is incorporated herein by reference.
       
  Pursuant to an Investment Management Agreement dated as of December 29, 1993,
between Tenneco and Woodbridge Capital Management, Inc. ("Woodbridge"),
Woodbridge, as an independent fiduciary representing the interests of the GEBT,
will exercise the voting and other privileges applicable to shareholders of the
Common Stock, subject only to Tenneco's agreement with the Issuer that the
Cummins Stock be voted for the election of all nominees included in the
Issuer's slate of directors at each shareholders' meeting of the Issuer.
Further, Woodbridge will exercise the GEBT's right to designate a person for
election to the Issuer's Board of Directors. A copy of the Investment
Management Agreement is filed with this statement as Exhibit 9 and is
incorporated herein by reference.     
   
THE INVESTMENT AGREEMENT     
   
  The Investment Agreement set forth the terms and conditions under which
Tenneco made its investment in the Issuer. The principal provisions of the
Investment Agreement included the following:     
     
    (i) Tenneco was entitled to designate one person for election to the
  Issuer's Board of Directors. Tenneco's designee on the Issuer's Board of
  Directors is Dana G. Mead, President and Chief Operating Officer of
  Tenneco.     
     
    (ii) Section 3.2 of the Investment Agreement contains certain standstill,
  voting, sales and other restrictions applicable to Tenneco with respect to
  Voting Securities of the Issuer. Included among such     
 
                                       2
<PAGE>
 
     
  restrictions is a percentage limitation on shares of Voting Securities
  Tenneco may own during the term of the Agreement. Tenneco has agreed that
  it will not acquire, by purchase or otherwise, beneficial ownership of
  Voting Securities or any rights or options to acquire such beneficial
  ownership other than the shares of Common Stock issued to it upon
  conversion of the Series T Preference Stock; provided, however, that
  Tenneco may acquire Voting Securities (i) that are issued as dividends on
  securities which Tenneco is permitted to hold under the Investment
  Agreement and (ii) in order to prevent its ownership of Voting Securities
  from falling below 10.8% of all Voting Securities then outstanding (or a
  higher percentage as established in Section 3.1(e) of the Investment
  Agreement).     
     
    (iii) Tenneco agreed that it would not engage in certain activities, as
  described in Sections 3.2(a)(ii) through (ix), unless requested or
  permitted in writing in advance by the Issuer. For so long as Tenneco
  beneficially owned 5% or more of the Voting Securities, it agreed not to
  act in concert with Ford Motor Company and Kubota Corporation, each of
  which purchased convertible preference stock from the Issuer effective July
  16, 1990, with respect to the activities set forth in Sections 3.2(a)(i)
  through (ix) of the Investment Agreement.     
     
    (iv) Tenneco agreed that it would not transfer any Voting Securities
  owned by it prior to July 16, 1996, except as permitted by Section 3.2(b)
  of the Investment Agreement.     
     
    (v) Tenneco agreed to vote its Voting Securities of the Issuer for the
  election of all nominees included in the Company's slate of directors at
  each shareholders' meeting of the Issuer. Tenneco was not otherwise
  restricted in the manner in which it could vote its Voting Securities on
  any matter submitted to the Issuer's shareholders.     
     
    (vi) The term of the Investment Agreement is for a minimum of six years
  and shall continue until the earlier to occur of (i) Tenneco ceasing to
  beneficially own at least 5.0% of the total voting power of all the then
  outstanding Voting Securities and (ii) ten years; provided, however, that
  certain provisions of the Investment Agreement, as set forth in Section 5.1
  thereof, survive termination.     
   
The above description of the Investment Agreement is qualified in its entirety
by the complete text of Exhibit 1.     
   
  Pursuant to the Consent and Amendment, the transfer of the Cummins Stock to
the GEBT on behalf of the Plan transferred to the GEBT all rights, obligations
and covenants of Tenneco under the Investment Agreement, as amended by the
Consent and Agreement. Additionally, Tenneco, Kern River, Case and the Plan
continue to be bound by the provisions of the Investment Agreement, as so
amended.     
   
GENERAL     
 
  Except as stated above, neither Tenneco nor, to the best of its knowledge,
any person identified in Schedule I has any plans or proposals as of the date
hereof which relate to or would result in:
 
    (1) the acquisition by any person of additional securities of the Issuer,
  or the disposition of securities of the Issuer;
 
    (2) an extraordinary corporate transaction, such as a merger,
  reorganization or liquidation, involving the Issuer or any of its
  subsidiaries;
 
    (3) a sale or transfer of a material amount of assets of the Issuer or
  any of its subsidiaries;
 
    (4) any change in the present board of directors or management of the
  Issuer, including any plans or proposals to change the number or term of
  directors or to fill any existing vacancies on the board;
 
    (5) any material change in the present capitalization or dividend policy
  of the Issuer;
 
    (6) any other material change in the Issuer's business or corporate
  structure;
 
    (7) changes in the Issuer's charter or bylaws or other actions which may
  impede the acquisition of control of the Issuer by any person;
 
                                       3
<PAGE>
 
    (8) causing a class of securities of the Issuer to be delisted from a
  national securities exchange or to cease to be authorized to be quoted in
  an inter-dealer quotation system of a registered national securities
  association;
 
    (9) a class of equity securities of the Issuer becoming eligible for
  termination of registration pursuant to Section 12(g)(4) of the Securities
  Exchange Act of 1934; or
 
    (10) any action similar to any of those enumerated above.
 
ITEM 5. INTEREST IN SECURITIES OF THE ISSUER.
   
  (a) None.     
   
  (b) Not applicable.     
 
  (c) In the past 60 days, neither Tenneco nor, to the best of its knowledge,
any of its directors or executive officers has engaged in any transaction in
the classes of securities covered by this statement except for the transaction
herein reported on.
   
  (d) See response to Item 4.     
   
  (e) As described in Item 4 above, on December 29, 1993, Tenneco ceased to be
the beneficial owner of more than five percent of the class of securities
covered by this statement.     
 
ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
     TO SECURITIES OF THE ISSUER.
   
  Except as described in Item 4 above, neither Tenneco nor, to the best of its
knowledge, any of its directors or executive officers has any contract,
arrangement, understanding or relationship with any person with respect to any
securities of the Issuer.     
 
ITEM 7. MATERIAL TO BE FILED AS EXHIBITS.
   
  Exhibits not incorporated by reference to a prior filing are designated by an
asterisk; all exhibits not so designated are incorporated herein by reference
to a prior filing as indicated.     
 
<TABLE>
 <C> <S>
   1 --Investment Agreement between Tenneco Inc. and Cummins Engine Company,
      Inc. dated as of July 16, 1990 (Exhibit 1 to Schedule 13D filed on July
      30, 1990).
   2 --Amendment No. 4, dated as of July 13, 1990, to the Rights Agreement,
      dated as of September 9, 1986, between the Issuer and the Rights Agent
      (Exhibit 2 to Schedule 13D filed on July 30, 1990).
  *3 --Consent and Amendment to Investment Agreement between Tenneco Inc. and
      Cummins Engine Company, Inc. dated as of December 29, 1993.
  *4 --Joinder in Agreement between Tenneco Inc. and Kern County Land Company
      dated as of December 29, 1993.
  *5 --Joinder in Agreement between Tenneco Inc. and Case Corporation dated as
      of December 29, 1993.
  *6 --Joinder in Agreement between Tenneco Inc. and Bankers Trust Company, as
      Trustee of the Case Corporation Pension Plan for Hourly-Paid Employees
      dated as of December 29, 1993.
  *7 --Joinder in Agreement between Tenneco Inc. and Bankers Trust Company, as
      Trustee of the Tenneco Inc. General Employee Benefit Trust dated as of
      December 29, 1993.
  *8 --Amendment No. 7, dated as of December 29, 1993, to the Rights Agreement,
      dated as of September 9, 1986, between the Issuer and the Rights Agent.
  *9 --Investment Management Agreement dated as of December 29, 1993 between
      Tenneco Inc. and Woodbridge Capital Management, Inc.
 *10 --Agreement relating to joint filing of Schedule 13D.
</TABLE>
 
                                       4
<PAGE>
 
                                   SIGNATURE
 
  After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
 
                                          TENNECO INC.
                                                 
                                              M.W. Meyer     
                                          By:__________________________________
                                              M. W. Meyer
                                              Vice President and Deputy
                                               General Counsel
   
Dated: January 10, 1994     
 
 
                                       5
<PAGE>
 
                                   SIGNATURE
 
  After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
                                             
                                          KERN COUNTY LAND COMPANY     
                                                 
                                              M. W. Meyer     
                                          By:__________________________________
                                              M. W. Meyer
                                                 
                                              Vice President     
   
Dated: January 10, 1994     
 
 
                                       6
<PAGE>
 
                                   SIGNATURE
 
  After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
                                             
                                          CASE CORPORATION     
                                                 
                                              Robert G. Simpson     
                                          By:__________________________________
                                                 
                                              Robert G. Simpson     
                                                 
                                              Vice President and Assistant
                                               Secretary     
   
Dated: January 10, 1994     
 
                                       7
<PAGE>
 
                                                                      SCHEDULE I
 
                           DIRECTORS OF TENNECO INC.
 
  The following table sets forth the name, business address and present
principal occupation or employment of each director of Tenneco Inc. Each such
person is a citizen of the United States of America.
 
<TABLE>
<CAPTION>
      NAME AND ADDRESS             PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
      ----------------             ------------------------------------------
<S>                           <C>
Michael H. Walsh              Chairman of the Board and Chief Executive Officer of
P.O. Box 2511                 Tenneco Inc.
Houston, Texas 77252-2511
Mark Andrews                  Chairman of Andrews Associates, Inc., a government
Suite 695                     consulting firm.
2550 M Street, N.W.
Washington, D.C. 20037
W. Michael Blumenthal         Chairman of the Board and Chief Executive Officer of
1 Rockefeller Plaza, 32nd     Lazard, Freres & Co.
Floor
New York, New York 10020
M. Kathryn Eickhoff           President of Eickhoff Economics, Inc., a consulting
Suite 400                     firm.
510 LaGuardia
New York, New York 10012
Peter T. Flawn                Former President of The University of Texas at
3718 Bridle Path              Austin.
Austin, Texas 78703
Henry U. Harris, Jr.          Vice Chairman Emeritus of Smith Barney, Harris Upham
Smith Barney, Harris Upham &  & Co., Incorporated, an investment banking firm.
Co.,  Incorporated
1345 Avenue of the Americas
New York, New York 10105
Belton K. Johnson             Engaged in farming, ranching and investments.
100 West Houston, Suite 1525
San Antonio, Texas 78230
John B. McCoy                 Chairman and Chief Executive Officer of BANC ONE
100 East Broad Street         Corporation, a bank holding company.
16th Floor
Columbus, Ohio 43271-0261
Dana G. Mead                  President and Chief Operating Officer of Tenneco
P. O. Box 2511                Inc.
Houston, Texas 77252-2511
Joseph J. Sisco               Partner of Sisco Associates, a management consulting
Sisco Associates              firm.
1250 24th Street, N.W.
Suite 875
Washington, D.C. 20037
</TABLE>
<PAGE>
 
                                                                     SCHEDULE II
 
                       EXECUTIVE OFFICERS OF TENNECO INC.
 
  The following table sets forth the name and present principal occupation or
employment of each executive officer of Tenneco Inc. Each such person is a
citizen of the United States of America.
 
  Unless otherwise indicated, the address of each officer is P. O. Box 2511,
Houston, Texas 77252-2511.
 
<TABLE>
<CAPTION>
                                            PRESENT PRINCIPAL OCCUPATION OR
            NAME AND ADDRESS                          EMPLOYMENT
            ----------------                -------------------------------
 <C>                                    <S>
                                        Chairman of the Board and Chief
 Michael H. Walsh...................... Executive Officer
 Dana G. Mead.......................... President and Chief Operating Officer
 Theodore R. Tetzlaff.................. General Counsel
                                        Senior Vice President and Chief
 Robert T. Blakely..................... Financial Officer
 Stacy S. Dick......................... Senior Vice President--Strategy
 Barry R. Schuman...................... Senior Vice President--Human Resources
                                        Vice President and Deputy General
 Kenneth D. Allen...................... Counsel
                                        Vice President--Financial Analysis and
 Matthew W. Appel...................... Planning
 John J. Castellani.................... Vice President--Government Relations
 James V. Faulkner, Jr................. Vice President--Law
 Arthur H. House....................... Vice President--Corporate Affairs
                                        Vice President and Deputy General
 M. W. Meyer........................... Counsel
 E. J. Milan........................... Vice President and Controller
 Robert G. Simpson..................... Vice President--Tax
 Karl A. Stewart....................... Vice President and Secretary
 Richard L. Wambold.................... Vice President--Operations
</TABLE>
<PAGE>
 
                                                                  
                                                               SCHEDULE III     
                      
                   DIRECTORS OF KERN COUNTY LAND COMPANY     
   
  The following table sets forth the name, business address and present
principal occupation or employment of each director of Kern County Land
Company. Each such person is a citizen of the United States of America.     
 
<TABLE>
<CAPTION>
  NAME AND ADDRESS                PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
  ----------------                ------------------------------------------
<S>                    <C>
Dana G. Mead           President and Chief Operating Officer of Tenneco Inc.
P. O. Box 2511
Houston, Texas 77252-
2511
Robert T. Blakely      Senior Vice President and Chief Financial Officer of Tenneco Inc.
P.O. Box 2511
Houston, Texas 77252-
2511
</TABLE>
<PAGE>
 
                                                                   
                                                                SCHEDULE IV     
                 
              EXECUTIVE OFFICERS OF KERN COUNTY LAND COMPANY     
   
  The following table sets forth the name and present principal occupation or
employment of each executive officer of Kern County Land Company. Each such
person is a citizen of the United States of America.     
 
  Unless otherwise indicated, the address of each officer is P. O. Box 2511,
Houston, Texas 77252-2511.
 
<TABLE>
<CAPTION>
                                           PRESENT PRINCIPAL OCCUPATION OR
            NAME AND ADDRESS                          EMPLOYMENT
            ----------------               -------------------------------
 <C>                                    <S>
                                        President and Chief Operating Officer
 Dana G. Mead.......................... of Tenneco Inc.
 Robert T. Blakely..................... Senior Vice President and Chief
                                         Financial Officer of Tenneco Inc.
 M. W. Meyer........................... Vice President and Deputy General
                                         Counsel of Tenneco Inc.
 Robert G. Simpson..................... Vice President--Tax of Tenneco Inc.
                                        Vice President and Secretary of
 Karl A. Stewart....................... Tenneco Inc.
</TABLE>
<PAGE>
 
                                                                    
                                                                 SCHEDULE V     
                          
                       DIRECTORS OF CASE CORPORATION     
   
  The following table sets forth the name, business address and present
principal occupation or employment of each director of Case Corporation. Each
such person is a citizen of the United States of America.     
 
<TABLE>
<CAPTION>
  NAME AND ADDRESS          PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
  ----------------          ------------------------------------------
<S>                    <C>
Dana G. Mead           President and Chief Operating Officer of Tenneco Inc.
P. O. Box 2511
Houston, Texas 77252-
2511
Theodore R. Tetzlaff   General Counsel of Tenneco Inc.
P.O. Box 2511
Houston, Texas 77252-
2511
</TABLE>
<PAGE>
 
                                                                   
                                                                SCHEDULE VI     
                     
                  EXECUTIVE OFFICERS OF CASE CORPORATION     
   
  The following table sets forth the name and present principal occupation or
employment of each executive officer of Case Corporation. Each such person is a
citizen of the United States of America.     
   
  Unless otherwise indicated, the address of each officer is 700 State Street,
Racine, Wisconsin 53404.     
 
<TABLE>
<CAPTION>
           NAME AND ADDRESS                  PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
           ----------------                  ------------------------------------------
<S>                                     <C>
Dana G. Mead..........................  President and Chief Operating Officer of Tenneco Inc.
 1010 Milam Street
 Houston, Texas 77002
Edward J. Campbell..................... President
Steven G. Lamb......................... Executive Vice President
Peter Menikoff......................... Executive Vice President
Richard M. Christman................... Senior Vice President
Thomas E. Evans........................ Senior Vice President
Theodore R. French..................... Senior Vice President, Chief Financial Officer and
                                         Treasurer
Kenneth Q. Kessler..................... Senior Vice President
Richard W. Krant, Jr................... Senior Vice President
Victoria L. Rickey..................... Senior Vice President
Harold D. Boyanovsky................... Vice President
Frank A. Brooke........................ Vice President
Jon R. Carlson......................... Vice President
Marc J. Castor......................... Vice President
Martin M. Dorio........................ Vice President
John E. Evard, Jr...................... Vice President
James L. Hatch......................... Vice President
Ruy R. Hirschheimer.................... Vice President
Herman F. Kosten....................... Vice President
Alfred J. Mulvey....................... Vice President
Ellen Robinson......................... Vice President
Dennis E. Schwieger.................... Vice President
Robert G. Simpson...................... Vice President--Tax of Tenneco Inc.
 1010 Milam Street
 Houston, Texas 77002
Karl A. Stewart........................ Vice President and Secretary of Tenneco Inc.
 1010 Milam Street
 Houston, Texas 77002
</TABLE>
<PAGE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                               ----------------
 
                                  SCHEDULE 13D
                               (AMENDMENT NO. 1)
 
                               ----------------
 
                          CUMMINS ENGINE COMPANY, INC.
                                (NAME OF ISSUER)
 
                               ----------------
 
                    COMMON STOCK, PAR VALUE $2.50 PER SHARE
                         (TITLE OF CLASS OF SECURITIES)
 
                                  231021 10 6
                                 (CUSIP NUMBER)
 
                               ----------------
 
 
                                    EXHIBITS
 
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
                               INDEX OF EXHIBITS
 
<TABLE>
<CAPTION>
                                                                   SEQUENTIALLY
 EXHIBIT                                                             NUMBERED
 NUMBER                   DESCRIPTION OF EXHIBITS                     PAGES
 -------                  -----------------------                  ------------
 <C>     <S>                                                       <C>
     1   --Investment Agreement between Tenneco Inc. and Cummins
          Engine Company, Inc. dated as of July 16, 1990 (Exhibit
          1 to Schedule 13D filed on July 30, 1990).                    *
     2   --Amendment No. 4, dated as of July 13, 1990, to the
          Rights Agreement, dated as of September 9, 1986,
          between the Issuer and the Rights Agent (Exhibit 2 to
          Schedule 13D filed on July 30, 1990).                         *
     3   --Consent and Amendment to Investment Agreement between
          Tenneco Inc. and Cummins Engine Company, Inc. dated as
          of December 29, 1993.
     4   --Joinder in Agreement between Tenneco Inc. and Kern
          County Land Company dated as of December 29, 1993.
     5   --Joinder in Agreement between Tenneco Inc. and Case
          Corporation dated as of December 29, 1993.
     6   --Joinder in Agreement between Tenneco Inc. and Bankers
          Trust Company, as Trustee of the Case Corporation
          Pension Plan for Hourly-Paid Employees dated as of
          December 29, 1993.
     7   --Joinder in Agreement between Tenneco Inc. and Bankers
          Trust Company, as Trustee of the Tenneco Inc. General
          Employee Benefit Trust dated as of December 29, 1993.
     8   --Amendment No. 7, dated as of December 29, 1993, to the
          Rights Agreement, dated as of September 9, 1986,
          between the Issuer and the Rights Agent.
     9   --Investment Management Agreement dated as of December
          29, 1993 between Tenneco Inc. and Woodbridge Capital
          Management, Inc.
    10   --Agreement relating to joint filing of Schedule 13D.
</TABLE>
- --------
   
* Exhibit incorporated by reference     

<PAGE>
 
                            CONSENT AND AMENDMENT TO
                              INVESTMENT AGREEMENT
 
  This Consent and Amendment ("Consent and Amendment") dated as of December 29,
1993, by and between TENNECO INC., a Delaware corporation (the "Investor"), and
CUMMINS ENGINE COMPANY, INC., an Indiana corporation (the "Company").
   
  WHEREAS, the Investor and the Company are parties to the Investment Agreement
dated as of July 16, 1990 (the "Investment Agreement"), pursuant to which the
(i) Investor invested $100,000,000 in securities of the Company, which
securities, as of the date hereof, consist of 3,200,000 shares of Common Stock
of the Company (the "Cummins Stock"), and (ii) the Investor acquired certain
rights and undertook certain obligations;     
   
  WHEREAS, the Investment Agreement restricts the ability of the Investor to
transfer the Cummins Stock; and     
   
  WHEREAS, the Investor proposes that the Cummins Stock be transferred to
Bankers Trust Company, as trustee of the Tenneco Inc. General Employee Benefit
Trust (the "Trust") (such trustee and any successor trustee, in their
respective capacities as trustee, are referred to herein as the "Trustee", and
all references herein to the Trustee shall be deemed to include the Trust) by
means of the following successive transfers of the Cummins Stock:     
     
    First, from the Investor to Kern County Land Company ("Kern"), a wholly-
  owned subsidiary of the Investor;     
     
    Second, from Kern to Case Corporation ("Case"), a wholly-owned subsidiary
  of Kern; and     
     
    Third, from Case to the Trustee for the account of the Case Corporation
  Pension Plan for Hourly-Paid Employees (the "Case Hourly Plan").     
   
The Company is willing to consent to such transfers (each a "Transfer" and
collectively, the "Transfers") on the terms and subject to the conditions
herein set forth. (Each of the transferees named above is referred to herein as
a "Transferee" and collectively, as the "Transferees".) In connection with the
proposed Transfers, the Investor and the Company are amending the Investment
Agreement as hereafter set forth.     
   
  NOW, THEREFORE, the parties agree as follows:     
 
  SECTION 1. Definitions. Except as modified in this Consent and Amendment,
terms used herein that are defined in the Investment Agreement shall have the
meanings that are set forth in the Investment Agreement.
     
    (a) The term "affiliate" (as defined in the first sentence of Section
  3.2(a) of the Investment Agreement) shall be construed so that the Trust
  shall not be deemed to be controlled by, or under common control with, any
  other person.     
     
    (b) The term "associate" (as defined in Section 3.2(a)(ii) of the
  Investment Agreement) shall be construed so that no trust or estate as to
  which the Trustee serves as trustee or in a similar fiduciary capacity
  shall be deemed to be an associate of the Trust.     
     
    (c) In determining whether a person is an "affiliate" or "associate" of
  the Trust, no person shall be considered to be controlled by the Trust, and
  no securities shall be considered owned by the Trust, unless the Trustee
  has such control or such ownership in its capacity as trustee of the Trust
  and not in any other capacity.     
<PAGE>
 
   
SECTION 2. Transfers of Cummins Stock.     
   
  (a) The Company hereby consents to each of the Transfers provided that (i)
prior to or simultaneous with each Transfer, the Transferee shall have executed
and delivered to the Investor and the Company a Joinder in Agreement in the
form required by Exhibit A and (ii) all of the Transfers occur and all the
Transferees execute and deliver such Joinders in Agreement.     
   
  (b) Simultaneously with the execution of this Consent and Amendment, the
Investor is delivering to the Company a certificate representing the Cummins
Stock, together with four stock powers, each duly executed in blank by the
Investor and each Transferee other than the Trustee. As promptly as possible,
the Company shall give appropriate instructions to the Company's stock transfer
agent and registrar to take such action as may be necessary on their part to
effect the Transfers and to register ownership of the Cummins Stock by the
Transferees in the stock records of the Company.     
   
SECTION 3. Representations and Warranties.     
   
  (a) Breaches of Original Representations by the Company. In the event of any
breach of any representation or warranty by the Company in the Investment
Agreement, the Trustee, and only the Trustee, shall be entitled to any remedy
it would have if such representation had been made to it at the time it
acquired the Cummins Stock, it being understood, however, that the
representations and warranties of the Company set forth in the Investment
Agreement are made only as of July 16, 1990, the date of the Investment
Agreement.     
   
  (b) Additional Representations by the Company. The Company represents and
warrants to the Investor and to each Transferee as follows:     
     
    (1) INDIANA BUSINESS COMBINATION ACT. Each of the Transfers, and any
  subsequent purchase of Voting Securities by the Trustee permitted by the
  Investment Agreement, as amended by this Consent and Amendment (the
  "Amended Investment Agreement"), has been approved by the Board of
  Directors of the Company for purposes of Sections 23-1-43-18 of the Indiana
  Business Corporation Law.     
     
    (2) RIGHTS AGREEMENT. Under the Rights Agreement, as in effect at the
  date hereof (the "Amended Rights Agreement"), none of the Transferees, upon
  acquisition of the Cummins Stock, shall be deemed an "Acquiring Person"
  thereunder in connection with its becoming a "Beneficial Owner" of "Common
  Shares" as defined in Section 1 thereof and as permitted pursuant to
  Section 3.2(a)(i), 3.2(d) or 3.2(e) of the Amended Investment Agreement.
  The Company has furnished to the Investor true and correct copies of the
  Amended Rights Agreement.     
   
SECTION 4. Assignment of Rights.     
   
  (a) Registration Rights. Each Transfer shall constitute an assignment of the
Investor's right pursuant to Section 3.1(b) of the Investment Agreement to
require registration of the Common Stock as set forth in Exhibit B to the
Investment Agreement (it being understood that after all Transfers contemplated
herein are completed, only the Trustee shall have such right).     
   
  (b) Modification of Terms. Each Transfer shall constitute an assignment of
the Investor's right, pursuant to Section 3.1(f) of the Investment Agreement,
to require that the Amended Investment Agreement be further amended to conform
with terms of Future Investment Agreements (it being understood that after all
Transfers contemplated herein are completed, only the Trustee shall have such
right); provided, however, that no such amendment shall be made if, in the
Investor's judgment, such amendment would adversely affect the Investor's
business interests. Accordingly, no such amendment shall be made unless the
Investor shall have timely indicated in writing to the Company and the Trustee
that it has no objection to the amendment.     
   
  (c) Right to Purchase Additional Shares. Each Transfer shall constitute an
assignment of the Investor's rights pursuant to Section 3.1(g) of the
Investment Agreement to purchase Voting Securities or Voting     
 
                                       2
<PAGE>
 
Security Equivalents (it being understood that after all Transfers contemplated
herein are completed, only the Trustee shall have such right).
   
  (d) Amended Rights Agreement. Simultaneously with the execution of this
Consent and Amendment, the Company shall execute, and shall cause the Rights
Agent (as defined in the Rights Agreement) to execute, the Amendment to the
Rights Agreement in the form attached hereto as Exhibit B.     
   
  (e) Control Share Acquisitions. The Company shall not amend its Restated
Articles of Incorporation or Bylaws if, as a result of such amendment, Chapter
42 of the Indiana Business Corporation Law would apply to any of the Transfers
contemplated by this Consent and Amendment.     
   
SECTION 5. Covenants of the Investor and the Transferees.     
   
  (a) Assumption of the Investor's Obligations. Acceptance by each Transferee
of the Transfer of the Cummins Stock shall constitute an assumption by such
Transferee of the covenants of the Investor set forth in Section 3.2 of the
Investment Agreement until such time as such Transferee transfers the Cummins
Stock to another Transferee as contemplated hereby (provided, however, that
each Transferee will remain bound by the terms of the Investment Agreement for
so long as such Transferee shall be an affiliate of the Investor). After all
the Transfers contemplated herein are complete, the Trustee shall be bound by
all the covenants set forth in Section 3.2, and Section 3.2 shall be deemed
amended to replace all references therein to the Investor with references to
the Trustee.     
   
  (b) Standstill and Other Provisions. Notwithstanding the assumption by the
Transferees of the Investor's obligations set forth in Section 3.2(a) and
3.2(f) of the Investment Agreement, the Investor and its affiliates shall
continue to be bound by such covenants during the term of the Amended
Investment Agreement and the following additional provisions shall apply:     
     
    (1) In determining the number of Voting Securities and Voting Security
  Equivalents held or controlled by the Trustee:     
       
      (A) only Voting Securities and Voting Security Equivalents held by
    the Trustee as trustee of the Trust shall be considered in making this
    determination; and     
       
      (B) Voting Securities and Voting Security Equivalents held by the
    Trustee as of the date of this Consent and Amendment shall be
    disregarded and shall not be subject to any of the provisions of the
    Amended Investment Agreement, which number of Voting Securities and
    Voting Security Equivalents has been previously disclosed in writing to
    the Company.     
     
    (2) Simultaneously with the execution of this Consent and Amendment, the
  Investor shall cause the Investment Committee for the Trust to give the
  instructions set forth on Exhibit C to each person managing or controlling
  assets of the Trust, and such instructions shall not be revoked or
  rescinded for so long as the Investor and the Trustee are restricted from
  acquiring Voting Securities or Voting Security Equivalents.     
     
    (3) Voting Securities and Voting Security Equivalents that are included
  in determining the number of Voting Securities and Voting Security
  Equivalents held or controlled by the Trust shall be aggregated with the
  number of Voting Securities and Voting Security Equivalents held or
  beneficially owned by the Investor and its affiliates for purposes of
  Sections 3.2(a) and 3.2(f) of the Amended Investment Agreement.     
     
    (4) The Investor hereby agrees that during the term of the Investment
  Agreement, the Investor and its affiliates will not acquire, or agree to
  acquire, beneficial ownership of any Voting Securities or Voting Security
  Equivalents or direct or indirect rights to acquire such beneficial
  ownership.     
   
  (c) Beneficial Ownership by Investor. For all purposes of the Investment
Agreement, the Investor shall continue to be deemed to beneficially own all
Voting Securities and Voting Security Equivalents held or controlled by the
Trustee (other than those specified in clause (b)(1)(B) above).     
 
                                       3
<PAGE>
 
   
  (d) Additional Exceptions Relating to Section 3.2. For purposes of Section
3.2(d) of the Investment Agreement, the Trust shall not be deemed to be a
Financial Affiliate. Each Transfer of the Cummins Stock shall constitute an
assignment of the Investor's rights pursuant to Section 3.2(e) of the
Investment Agreement (it being understood that after all Transfers contemplated
herein are completed, only the Trustee shall have such right).     
 
  SECTION 6. Board Representation. Each Transfer shall constitute an assignment
of the Investor's right, pursuant to Article IV of the Investment Agreement, to
designate one person for election to the Company's Board of Directors (it being
understood that after all Transfers contemplated herein are completed, only the
Trustee shall have such right); provided, however, that any sale or transfer of
Voting Securities by the Trustee shall be deemed to be a sale or transfer by
the Investor.
 
  SECTION 7. Investment Management Agreement. Investor shall not amend, modify
or supplement Section 5 of the Investment Management Agreement dated as of
December 27, 1993, among the Investment Committee of the Tenneco Inc. General
Employee Benefit Trust, Woodbridge Capital Management, Inc. and Investor (the
"Investment Management Agreement") without the consent of the Company.
Furthermore, Investor shall cause a provision having the same effect as Section
5 of the Investment Management Agreement to be included in any investment
management agreement with any person (including any new investment management
agreement with Woodbridge Capital Management, Inc.) who manages any portion of
the Trust that includes any Cummins Stock, and Investor shall not amend, modify
or supplement any such provision without the consent of the Company.
   
  SECTION 8. Miscellaneous.     
   
  (a) Legend. The legend set forth in Section 6.3 of the Investment Agreement
shall be amended by inserting after the words "Tenneco Inc." the phrase ", as
amended by a Consent and Amendment dated December 29, 1993,". Such legend, as
so amended, shall be included on the certificates for the Cummins Stock issued
to each Transferee and shall remain on such certificates for the period
specified in Section 6.3 of the Investment Agreement.     
   
  (b) Notices. The address of each Transferee for communications referred to in
Section 6.8 of the Investment Agreement shall be as specified in the Joinder in
Agreement for such Transferee.     
   
  (c) Limited Applicability. This Consent and Amendment shall be effective only
as to the specific matters expressly covered hereby and shall not be construed
or deemed to alter any other provision of the Investment Agreement.     
   
  (d) Governing Law. This Consent and Amendment shall be governed by and
construed and enforced in accordance with the internal laws of the State of
Indiana without regard to the principles of conflicts of laws.     
   
  (e) Counterparts. This Consent and Amendment may be executed in two or more
counterparts, all of which shall be considered one and the same agreement, and
shall become effective when counterparts have been signed by each party and
delivered to the other party.     
   
  (f) Specific Performance. The parties hereto acknowledge that damages would
be an inadequate remedy for any breach of the provisions of this Consent and
Amendment and agree that the obligations of the parties hereunder shall be
specifically enforceable.     
 
                                       4
<PAGE>
 
  IN WITNESS WHEREOF, the parties have caused this Consent and Agreement to be
duly executed by their duly authorized officers as of the date hereof.
                                             
                                          CUMMINS ENGINE COMPANY, INC.     
                                                     
                                                  Steven L. Zeller     
                                          -------------------------------------
                                                     
                                                  Steven L. Zeller     
                                             
                                          TENNECO INC.     
                                                       
                                                    M. W. Meyer     
                                          -------------------------------------
                                                       
                                                    M. W. Meyer     
 
                                       5
<PAGE>
 
                                                                       EXHIBIT A
 
                              JOINDER IN AGREEMENT
   
  This Agreement is made as of the       day of December, 1993, by and between
Tenneco Inc. (the "Investor") and                         (the "Transferee").
    
                              W I T N E S S E T H:
   
  WHEREAS, the Investor and Cummins Engine Company, Inc. (the "Company") have
previously entered into an Investment Agreement dated as of July 16, 1990,
which provided for the purchase by the Investor of certain securities of the
Company, which securities presently consist of 3,200,000 shares of Common Stock
of the Company (the "Shares"); and     
   
  WHEREAS, the Investor desires to transfer the Shares to the Transferee and,
pursuant to a Consent and Amendment to Investment Agreement dated as of
December   , 1993 (the "Consent and Amendment"), the Company has consented to
such transfer; and     
   
  WHEREAS, it is a condition precedent to the transfer of the Shares to the
Transferee that the Transferee enter into this Joinder in Agreement;     
   
 NOW THEREFORE, the parties agree as follows:     
 
    1. By execution of this Joinder in Agreement, the Transferee shall become
  a party to the Consent and Amendment, and the Transferee shall be bound by
  the terms and provisions of the Consent and Amendment to the same extent as
  if the Transferee were originally a party thereto.
 
    2. The Investor and the Transferee agree that (i) the Company is a third
  party beneficiary of this Joinder in Agreement, and (ii) this Joinder in
  Agreement may not be amended without the Company's written consent.
     
    3. Representations and Warranties:     
     
    Each of the Investor and the Transferee and only as to itself represent
  for the benefit of the Company as follows:     
       
      (a) It has all requisite power and authority to execute and deliver
    this Joinder in Agreement.     
       
      (b) The consummation of the Joinder in Agreement as contemplated
    hereby does not contravene its constitutive documents.     
       
      (c) This Joinder in Agreement has been duly executed and delivered by
    it and is the legal, valid and binding obligation of it enforceable
    against it in accordance with its terms.     
       
      (d) The execution, delivery and performance of this Joinder in
    Agreement and the consummation of the transactions contemplated hereby
    will not conflict with, or constitute a default under, or give to
    others any right of termination, amendment, acceleration or
    cancellation of any agreement, indenture or instrument to which it is a
    party or result in any violation of any law, rule, regulation, order,
    judgment or decree applicable to it, including without limitation any
    provisions of the Employee Retirement Income Security Act of 1974, as
    amended ("ERISA"), and the rules and regulations promulgated
    thereunder, and any and all consents or approvals required by ERISA to
    permit the execution, delivery and performance of this Joinder in
    Agreement and the consummation of the transactions contemplated hereby
    have been obtained.     
<PAGE>
 
     
    4. The address for any notices or communications required or permitted to
  be given to the Transferee under the Investment Agreement, as amended by
  the Consent and Amendment, shall be as follows:     
 
                  ------------------------------------------
                  ------------------------------------------
                  ------------------------------------------
                  ------------------------------------------
 
  IN WITNESS WHEREOF, the parties hereto have caused this Joinder in Agreement
to be duly executed by their respective authorized officers as of the date
hereof.
                                             
                                          TENNECO INC.     
                                             
                                          by ______________________________    
 
                                          [TRANSFEREE]
                                             
                                          by ______________________________    
<PAGE>
 
                                                                     
                                                                  EXHIBIT B     
   
  AMENDMENT NO. 7 dated as of             , 1993, to the Rights Agreement dated
as of September 9, 1986, as amended, between Cummins Engine Company, Inc., an
Indiana corporation (the "Company"), and The First National Bank of Chicago, a
national banking association, as Rights Agent (the "Rights Agent").     
   
  WHEREAS the Company and the Rights Agent are parties to a Rights Agreement
dated as of September 9, 1986, as amended (the "Rights Agreement"); and     
   
  WHEREAS the Company and the Rights Agent deem it desirable to further amend
the Rights Agreement as set forth herein.     
   
  NOW THEREFORE, in consideration of the mutual promises and covenants
contained herein and in the Rights Agreement, the parties hereto agree as
follows:     
   
  1. Section 1(a) of the Rights Agreement is hereby amended to read in its
entirety as follows:     
     
    "(a) "Acquiring Person" shall mean any Person who or which, together with
  all Affiliates and Associates of such Person, shall after the acquisition
  by such Person (or by such Person's Affiliates or Associates) on or after
  July 16, 1990 of Beneficial Ownership of Common Shares be the Beneficial
  Owner of 15% or more of the Common Shares then outstanding (the number of
  Common Shares then outstanding being the number set forth in the then most
  recently available filing by the Company pursuant to the Exchange Act) but
  shall not include (i) the Company, any Subsidiary of the Company, any
  employee benefit plan of the Company or of any of its Subsidiaries or any
  Person holding Common Shares for or pursuant to the terms of any such
  employee benefit plan; (ii) any Person who becomes a Beneficial Owner of
  15% or more of the Common Shares then outstanding and who, within 5
  Business Days of the public announcement by the Company or such Person that
  such Person has acquired such Beneficial Ownership, divests itself of a
  sufficient number of Common Shares so that it is no longer the Beneficial
  Owner of 15% or more of the then outstanding Common Shares; (iii) Ford
  Motor Company, a Delaware corporation ("Ford"), provided that Ford does not
  acquire Beneficial Ownership of Common Shares except as permitted pursuant
  to Section 3.2(a)(i), Section 3.2(e) or Section 3.2(f) of the Investment
  Agreement between the Company and Ford dated as of July 16, 1990 (the "Ford
  Investment Agreement"), or pursuant to the Option Agreement (as defined in
  such Investment Agreement); (iv) the Trustee and the Trust (as such terms
  are defined in the Consent and Amendment dated as of             , 1993
  (the "Consent and Amendment") between the Company and Tenneco Inc., a
  Delaware corporation ("Tenneco"), provided that the Trustee does not
  acquire Beneficial Ownership of Common Shares except as permitted pursuant
  to (x) Section 3.2(a)(i), Section 3.2(d) or Section 3.2(e) of the
  Investment Agreement between the Company and Tenneco dated as of July 16,
  1990 (the "Tenneco Investment Agreement") or (y) the Consent and Amendment;
  or (v) Kubota Corporation, a Japanese corporation ("Kubota"), provided that
  Kubota does not acquire Beneficial Ownership of Common Shares except as
  permitted to Section 3.2(a)(i), Section 3.2(d) and Section 3.2(e) of the
  Investment Agreement between the Company and Kubota dated as of July 16,
  1990 (the "Kubota Investment Agreement")."     
   
  2. Section 1(b) of the Rights Agreement is hereby amended to read in its
entirety as follows:     
     
      "(b) "Affiliate" and "Associate", when used with reference to any
  Person, shall have the respective meanings ascribed to such terms in Rule
  12b-2 of the General Rules and Regulations under the Securities Exchange
  Act of 1934, as in effect on the date hereof, provided, however, that (i)
  the Trustee shall not be deemed to be controlled by, or under common
  control; with, any other Person, (ii) no trust or estate as to which the
  Trustee serves as trustee or in a similar fiduciary capacity shall be
  deemed to be     
<PAGE>
 
     
  an Associate of the Trust and (iii) no Person shall be considered to be
  controlled by the Trust, and no Common Shares shall be considered owned by
  the Trust, unless the Trustee has such control or such ownership in its
  capacity as Trustee and not in any other capacity."     
   
  3. Section 1(c) of the Rights Agreement is hereby amended to read in its
entirety as follows:     
     
    "(c) "A Person shall be deemed the "Beneficial Owner" of, and shall be
  deemed to "beneficially own" any securities:     
       
    (i) which such Person or any of such Person's Affiliates or Associates
    beneficially owns, directly or indirectly;     
       
    (ii) which such Person or any of such Person's Affiliates or Associates
    has (A) the right to acquire (whether such right is exercisable
    immediately or only after the passage of time) pursuant to any
    agreement, arrangement or understanding, or upon the exercise of
    conversion rights, exchange rights, rights (other than rights issuable
    under this Rights Agreement), warrants or options, or otherwise;
    provided, however, that a Person shall not be deemed the Beneficial
    Owner of, or to beneficially own, securities tendered pursuant to a
    tender or exchange offer made by or on behalf of such Person or any of
    such Person's Affiliates or Associates until such tendered securities
    are accepted for purchase or exchange thereunder; or (B) the right to
    vote pursuant to any agreement, arrangement or understanding; provided,
    however, that a Person shall not be deemed the Beneficial Owner of, or
    to beneficially own, any security if the agreement, arrangement or
    understanding to vote such security (1) arises solely from a revocable
    proxy given to such Person in response to a public proxy or consent
    solicitation made pursuant to, and in accordance with, the applicable
    rules and regulations under the Exchange Act and (2) is not also then
    reportable on Schedule 13D under the Exchange Act (or any comparable or
    successor report); or     
       
    (iii) which are beneficially owned, directly or indirectly, by any
    other Person with which such Person or any of such Person's Affiliates
    or Associates has any agreement, arrangement or understanding (whether
    or not in writing), for the purpose of acquiring, holding, voting
    (except pursuant to a revocable proxy as described in clause (B) of
    subparagraph (ii) of this paragraph (c)) or disposing of any securities
    of the Company.     
   
  Notwithstanding the foregoing, in accordance with the terms of the Consent
and Amendment, Tenneco will be deemed to be the Beneficial Owner of all the
Common Shares held or controlled by the Trust (other than the Common Shares
specified in Section 5(b)(1)(B) of the Consent and Amendment)."     
   
  4. Section 1(hh) of the Rights Agreement is hereby amended to read in its
entirety as follows:     
     
    "(hh) "Tender Offer Date" shall mean the first date of the commencement
  of, or first public disclosure of the intent of any Person (other than (w)
  the Company, any Subsidiary of the Company, any employee benefit plan of
  the Company or of any of its Subsidiaries or any Person holding Common
  Shares for or pursuant to the terms of any such employee benefit plan, (x)
  Ford in connection with its making of an offer in accordance with Section
  3.2(a)(i) or Section 3.2(f) of the Ford Investment Agreement, (y) the
  Trustee in connection with its making of an offer in accordance with the
  final provision of Section 3.2(e) of the Tenneco Investment Agreement or
  (z) Kubota in connection with its making of an offer in accordance with the
  final provision of Section 3.2(a)(i) or Section 3.2(e) of the Kubota
  Investment Agreement) to commence a tender or exchange offer for 20% or
  more of the outstanding Common Shares (including any such date which is
  after the date of this Rights Agreement and prior to the issuance of the
  Rights)."     
   
  5. Section 11(d)(i) of the Rights Agreement is hereby amended to read in its
entirety as follows:     
     
    "Notwithstanding any provision of this Rights Agreement, a Triggering
  Event shall not be deemed to have occurred solely as a result of (i) any of
  Ford, the Trustee or Kubota becoming the Beneficial Owner of Common Shares
  as permitted pursuant to (x) in the case of Ford, Section 3.2(a), Section
  3.2(e)     
 
                                       2
<PAGE>
 
     
  or Section 3.2(f) of the Ford Investment Agreement, (y) in the case of the
  Trustee, Section 3.2(a), Section 3.2(d) or Section 3.2(e) of the Tenneco
  Investment Agreement or, in the case of any Transferee, pursuant to the
  terms of the Consent and Amendment or (z) in the case of Kubota, Section
  3.2(a), Section 3.2(d) or Section 3.2(e) of the Kubota Investment Agreement
  or (ii) Ford becoming the Beneficial Owner of Common Shares as permitted by
  the Option Agreement."     
   
  6. Except as expressly amended hereby, the Rights Agreement shall remain in
full force and effect.     
   
  IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 7 to
the Rights Agreement to be duly executed and their respective corporate seals
to be hereunto affixed and attested, all as of the day and year first above
written.     
                                             
                                          CUMMINS ENGINE COMPANY, INC.     
                                             
                                          By: _____________________________    
                                                
                                             Peter B. Hamilton     
                                                
                                             Vice President and Chief
                                              Financial Officer     
   
[SEAL]     
   
Attest:     
 
- -------------------------------
   
Steven L. Zeller     
   
Secretary     
                                             
                                          THE FIRST NATIONAL BANK OF CHICAGO,
                                           as Rights Agent     
                                             
                                          By: _____________________________    
                                                
                                             Michael R. Phalen     
                                                
                                             Vice President     
   
[SEAL]     
   
Attest:     
 
- -------------------------------
 
                                       3
<PAGE>
 
                                                                       EXHIBIT C
 
                                     [Date]
 
[Name and address of
each Asset Manager]
 
Ladies and Gentlemen:
 
  On this day the Tenneco Inc. General Employee Benefit Trust (the "Trust") has
acquired 3,200,000 shares of Cummins Engine Company, Inc. ("Cummins"). In
connection with this transaction, Bankers Trust Company, in its capacity as
trustee of the Trust, has agreed that it will not acquire any Voting Securities
or Voting Security Equivalents of Cummins except as permitted by the agreement
between the Trustee and Cummins. The definitions of Voting Securities and
Voting Security Equivalents are set forth in Annex I to this letter.
 
  In order to comply with the terms of the agreement between Cummins and the
Trust, the Investment Committee under the Trust hereby instructs you to refrain
from acquiring any Voting Securities or Voting Security Equivalents through the
account that you manage on behalf of the Trust. This instruction shall remain
in effect until the Investment Committee informs you in writing that this
restriction is no longer in effect.
 
  If there are any Voting Securities or Voting Security Equivalents in the
account managed by you, the foregoing instruction shall not require the
disposition of such securities.
 
  If you have any questions concerning this matter, please call
                    at your convenience.
 
                                          Very truly yours,
 
                                          The Investment Committee under the
                                          Tenneco Inc. General Employee
                                          Benefit Trust
                                             
                                          By ______________________________    
                                                     Chairman of the
                                                  Investment Committee
<PAGE>
 
                                                                         ANNEX I
 
  "Voting Securities" means any securities issued by Cummins having the
ordinary power to vote, in the absence of contingencies, in the election of
directors of Cummins.
 
  "Voting Security Equivalents" means securities convertible into or
exchangeable for Voting Securities or options to purchase such securities or
Voting Securities.

<PAGE>
 
                              JOINDER IN AGREEMENT
 
  This Agreement is made as of the 29th day of December, 1993, by and between
Tenneco Inc. (the "Investor") and Kern County Land Company (the "Transferee").
 
                              W I T N E S S E T H:
   
  WHEREAS, the Investor and Cummins Engine Company, Inc. (the "Company") have
previously entered into an Investment Agreement dated as of July 16, 1990,
which provided for the purchase by the Investor of certain securities of the
Company, which securities presently consist of 3,200,000 shares of Common Stock
of the Company (the "Shares"); and     
   
  WHEREAS, the Investor desires to transfer the Shares to the Transferee and,
pursuant to a Consent and Amendment to Investment Agreement dated as of
December 29, 1993 (the "Consent and Amendment"), the Company has consented to
such transfer; and     
   
  WHEREAS, it is a condition precedent to the transfer of the Shares to the
Transferee that the Transferee enter into this Joinder in Agreement;     
   
  NOW THEREFORE, the parties agree as follows:     
 
    1. By execution of this Joinder in Agreement, the Transferee shall become
  a party to the Consent and Amendment, and the Transferee shall be bound by
  the terms and provisions of the Consent and Amendment to the same extent as
  if the Transferee were originally a party thereto.
 
    2. The Investor and the Transferee agree that (i) the Company is a third
  party beneficiary of this Joinder in Agreement, and (ii) this Joinder in
  Agreement may not be amended without the Company's written consent.
     
    3. Representations and Warranties:     
     
    Each of the Investor and the Transferee and only as to itself represent
  for the benefit of the Company as follows:     
       
      (a) It has all requisite power and authority to execute and deliver
    this Joinder in Agreement.     
       
      (b) The consummation of the Joinder in Agreement as contemplated
    hereby does not contravene its constitutive documents.     
       
      (c) This Joinder in Agreement has been duly executed and delivered by
    it and is the legal, valid and binding obligation of it enforceable
    against it in accordance with its terms.     
       
      (d) The execution, delivery and performance of this Joinder in
    Agreement and the consummation of the transactions contemplated hereby
    will not conflict with, or constitute a default under, or give to
    others any right of termination, amendment, acceleration or
    cancellation of any agreement, indenture or instrument to which it is a
    party or result in any violation of any law, rule, regulation, order,
    judgment or decree applicable to it, including without limitation any
    provisions of the Employee Retirement Income Security Act of 1974, as
    amended ("ERISA"), and the rules and regulations promulgated
    thereunder, and any and all consents or approvals required by ERISA to
    permit the execution, delivery and performance of this Joinder in
    Agreement and the consummation of the trans-actions contemplated hereby
    have been obtained.     
<PAGE>
 
     
    4. The address for any notices or communications required or permitted to
  be given to the Transferee under the Investment Agreement, as amended by
  the Consent and Amendment, shall be as follows:     
 
            Kern County Land Company
            P.O. Box 2511
            Houston, Texas 77252-2511
            Attention: Corporate Secretary
            Telecopy: 713-757-3581
 
  IN WITNESS WHEREOF, the parties hereto have caused this Joinder in Agreement
to be duly executed by their respective authorized officers as of the date
hereof.
                                             
                                          TENNECO INC.     
                                                       
                                                    M. W. Meyer     
                                             
                                          by ______________________________    
                                                       
                                                    M. W. Meyer     
 
                                          KERN COUNTY LAND COMPANY
                                                    
                                                 Robert G. Simpson     
                                             
                                          by ______________________________    
                                                    
                                                 Robert G. Simpson     

<PAGE>
 
                              JOINDER IN AGREEMENT
 
  This Agreement is made as of the 29th day of December, 1993, by and between
Tenneco Inc. (the "Investor") and Case Corporation (the "Transferee").
 
                              W I T N E S S E T H:
   
  WHEREAS, the Investor and Cummins Engine Company, Inc. (the "Company") have
previously entered into an Investment Agreement dated as of July 16, 1990,
which provided for the purchase by the Investor of certain securities of the
Company, which securities presently consist of 3,200,000 shares of Common Stock
of the Company (the "Shares"); and     
   
  WHEREAS, the Investor desires to transfer the Shares to the Transferee and,
pursuant to a Consent and Amendment to Investment Agreement dated as of
December 29, 1993 (the "Consent and Amendment"), the Company has consented to
such transfer; and     
   
  WHEREAS, it is a condition precedent to the transfer of the Shares to the
Transferee that the Transferee enter into this Joinder in Agreement;     
   
  NOW THEREFORE, the parties agree as follows:     
 
    1. By execution of this Joinder in Agreement, the Transferee shall become
  a party to the Consent and Amendment, and the Transferee shall be bound by
  the terms and provisions of the Consent and Amendment to the same extent as
  if the Transferee were originally a party thereto.
 
    2. The Investor and the Transferee agree that (i) the Company is a third
  party beneficiary of this Joinder in Agreement, and (ii) this Joinder in
  Agreement may not be amended without the Company's written consent.
     
    3. Representations and Warranties:     
     
    Each of the Investor and the Transferee and only as to itself represent
  for the benefit of the Company as follows:     
       
      (a) It has all requisite power and authority to execute and deliver
    this Joinder in Agreement.     
       
      (b) The consummation of the Joinder in Agreement as contemplated
    hereby does not contravene its constitutive documents.     
       
      (c) This Joinder in Agreement has been duly executed and delivered by
    it and is the legal, valid and binding obligation of it enforceable
    against it in accordance with its terms.     
       
      (d) The execution, delivery and performance of this Joinder in
    Agreement and the consummation of the transactions contemplated hereby
    will not conflict with, or constitute a default under, or give to
    others any right of termination, amendment, acceleration or
    cancellation of any agreement, indenture or instrument to which it is a
    party or result in any violation of any law, rule, regulation, order,
    judgment or decree applicable to it, including without limitation any
    provisions of the Employee Retirement Income Security Act of 1974, as
    amended ("ERISA"), and the rules and regulations promulgated
    thereunder, and any and all consents or approvals required by ERISA to
    permit the execution, delivery and performance of this Joinder in
    Agreement and the consummation of the trans-actions contemplated hereby
    have been obtained.     
<PAGE>
 
     
    4. The address for any notices or communications required or permitted to
  be given to the Transferee under the Investment Agreement, as amended by
  the Consent and Amendment, shall be as follows:     
 
            Case Corporation
            700 State Street
            Racine, Wisconsin 53404
            Attention: Corporate Secretary
            Telecopy: 414-636-7188
 
  IN WITNESS WHEREOF, the parties hereto have caused this Joinder in Agreement
to be duly executed by their respective authorized officers as of the date
hereof.
                                             
                                          TENNECO INC.     
                                                       
                                                    M. W. Meyer     
                                             
                                          by ______________________________    
                                                       
                                                    M. W. Meyer     
 
                                          CASE CORPORATION
                                                    
                                                 Robert G. Simpson     
                                             
                                          by ______________________________    
                                                    
                                                 Robert G. Simpson     

<PAGE>
 
                              JOINDER IN AGREEMENT
 
  This Agreement is made as of the 29th day of December, 1993, by and between
Tenneco Inc. (the "Investor") and Bankers Trust Company, as Trustee of the Case
Corporation Pension Plan for Hourly-Paid Employees (the "Transferee").
 
                              W I T N E S S E T H:
   
  WHEREAS, the Investor and Cummins Engine Company, Inc. (the "Company") have
previously entered into an Investment Agreement dated as of July 16, 1990,
which provided for the purchase by the Investor of certain securities of the
Company, which securities presently consist of 3,200,000 shares of Common Stock
of the Company (the "Shares"); and     
   
  WHEREAS, the Investor desires to transfer the Shares to the Transferee and,
pursuant to a Consent and Amendment to Investment Agreement dated as of
December 29, 1993 (the "Consent and Amendment"), the Company has consented to
such transfer; and     
   
  WHEREAS, it is a condition precedent to the transfer of the Shares to the
Transferee that the Transferee enter into this Joinder in Agreement;     
   
  NOW THEREFORE, the parties agree as follows:     
 
    1. By execution of this Joinder in Agreement, the Transferee shall become
  a party to the Consent and Amendment, and the Transferee shall be bound by
  the terms and provisions of the Consent and Amendment to the same extent as
  if the Transferee were originally a party thereto.
 
    2. The Investor and the Transferee agree that (i) the Company is a third
  party beneficiary of this Joinder in Agreement, and (ii) this Joinder in
  Agreement may not be amended without the Company's written consent.
     
    3. Representations and Warranties:     
     
    Each of the Investor and the Transferee and only as to itself represent
  for the benefit of the Company as follows:     
       
      (a) It has all requisite power and authority to execute and deliver
    this Joinder in Agreement.     
       
      (b) The consummation of the Joinder in Agreement as contemplated
    hereby does not contravene its constitutive documents.     
       
      (c) This Joinder in Agreement has been duly executed and delivered by
    it and is the legal, valid and binding obligation of it enforceable
    against it in accordance with its terms.     
       
      (d) The execution, delivery and performance of this Joinder in
    Agreement and the consummation of the transactions contemplated hereby
    will not conflict with, or constitute a default under, or give to
    others any right of termination, amendment, acceleration or
    cancellation of any agreement, indenture or instrument to which it is a
    party or result in any violation of any law, rule, regulation, order,
    judgment or decree applicable to it, including without limitation any
    provisions of the Employee Retirement Income Security Act of 1974, as
    amended ("ERISA"), and the rules and regulations promulgated
    thereunder, and any and all consents or approvals required by ERISA to
    permit the execution, delivery and performance of this Joinder in
    Agreement and the consummation of the trans-actions contemplated hereby
    have been obtained.     
<PAGE>
 
     
    4. The address for any notices or communications required or permitted to
  be given to the Transferee under the Investment Agreement, as amended by
  the Consent and Amendment, shall be as follows:     
 
            BANKERS TRUST COMPANY, as Trustee of the
              Case Corporation Pension Plan for
              Hourly-Paid Employees
            c/o Bankers Trust Company of the Southwest
            3000 Two Houston Center
            909 Fannin, Suite 3000
            Houston, Texas 77010
               
            Attention: Thomas Calabro, Jr.     
            Telecopy: 713-759-6767
 
  IN WITNESS WHEREOF, the parties hereto have caused this Joinder in Agreement
to be duly executed by their respective authorized officers as of the date
hereof.
                                             
                                          TENNECO INC.     
                                                       
                                                    M. W. Meyer     
                                             
                                          by ______________________________    
                                                       
                                                    M. W. Meyer     
 
                                          BANKERS TRUST COMPANY, as Trustee
                                            of the Case Corporation Pension
                                            Plan for Hourly-Paid Employees
                                                    
                                                 Daniel C. Mueller     
                                             
                                          by ______________________________    
                                                    
                                                 Daniel C. Mueller     

<PAGE>
 
                              JOINDER IN AGREEMENT
 
  This Agreement is made as of the 29th day of December, 1993, by and between
Tenneco Inc. (the "Investor") and Bankers Trust Company, as Trustee of the
Tenneco Inc. General Employee Benefit Trust (the "Transferee").
 
                              W I T N E S S E T H:
   
  WHEREAS, the Investor and Cummins Engine Company, Inc. (the "Company") have
previously entered into an Investment Agreement dated as of July 16, 1990,
which provided for the purchase by the Investor of certain securities of the
Company, which securities presently consist of 3,200,000 shares of Common Stock
of the Company (the "Shares"); and     
   
  WHEREAS, the Investor desires to transfer the Shares to the Transferee and,
pursuant to a Consent and Amendment to Investment Agreement dated as of
December 29, 1993 (the "Consent and Amendment"), the Company has consented to
such transfer; and     
   
  WHEREAS, it is a condition precedent to the transfer of the Shares to the
Transferee that the Transferee enter into this Joinder in Agreement;     
   
  NOW THEREFORE, the parties agree as follows:     
 
    1. By execution of this Joinder in Agreement, the Transferee shall become
  a party to the Consent and Amendment, and the Transferee shall be bound by
  the terms and provisions of the Consent and Amendment to the same extent as
  if the Transferee were originally a party thereto.
 
    2. The Investor and the Transferee agree that (i) the Company is a third
  party beneficiary of this Joinder in Agreement, and (ii) this Joinder in
  Agreement may not be amended without the Company's written consent.
     
    3. Representations and Warranties:     
     
    Each of the Investor and the Transferee and only as to itself represent
  for the benefit of the Company as follows:     
       
      (a) It has all requisite power and authority to execute and deliver
    this Joinder in Agreement.     
       
      (b) The consummation of the Joinder in Agreement as contemplated
    hereby does not contravene its constitutive documents.     
       
      (c) This Joinder in Agreement has been duly executed and delivered by
    it and is the legal, valid and binding obligation of it enforceable
    against it in accordance with its terms.     
       
      (d) The execution, delivery and performance of this Joinder in
    Agreement and the consummation of the transactions contemplated hereby
    will not conflict with, or constitute a default under, or give to
    others any right of termination, amendment, acceleration or
    cancellation of any agreement, indenture or instrument to which it is a
    party or result in any violation of any law, rule, regulation, order,
    judgment or decree applicable to it, including without limitation any
    provisions of the Employee Retirement Income Security Act of 1974, as
    amended ("ERISA"), and the rules and regulations promulgated
    thereunder, and any and all consents or approvals required by ERISA to
    permit the execution, delivery and performance of this Joinder in
    Agreement and the consummation of the trans-actions contemplated hereby
    have been obtained.     
<PAGE>
 
     
    4. The address for any notices or communications required or permitted to
  be given to the Transferee under the Investment Agreement, as amended by
  the Consent and Amendment, shall be as follows:     
 
            BANKERS TRUST COMPANY, as Trustee of the
              Tenneco Inc. General Employee Benefit Trust
            c/o Bankers Trust Company of the Southwest
            3000 Two Houston Center
            909 Fannin, Suite 3000
            Houston, Texas 77010
               
            Attention: Thomas Calabro, Jr.     
            Telecopy: 713-759-6767
 
  IN WITNESS WHEREOF, the parties hereto have caused this Joinder in Agreement
to be duly executed by their respective authorized officers as of the date
hereof.
                                             
                                          TENNECO INC.     
                                                       
                                                    M. W. Meyer     
                                             
                                          by ______________________________    
                                                       
                                                    M. W. Meyer     
 
                                          BANKERS TRUST COMPANY, as Trustee
                                            of the Tenneco Inc. General
                                            Employee Benefit Trust
                                                    
                                                 Daniel C. Mueller     
                                             
                                          by ______________________________    
                                                    
                                                 Daniel C. Mueller     

<PAGE>
 
   
  AMENDMENT NO. 7 dated as of December 29, 1993, to the Rights Agreement dated
as of September 9, 1986, as amended, between Cummins Engine Company, Inc., an
Indiana corporation (the "Company"), and The First National Bank of Chicago, a
national banking association, as Rights Agent (the "Rights Agent").     
   
  WHEREAS the Company and the Rights Agent are parties to a Rights Agreement
dated as of September 9, 1986, as amended (the "Rights Agreement"); and     
   
  WHEREAS the Company and the Rights Agent deem it desirable to further amend
the Rights Agreement as set forth herein.     
   
  NOW THEREFORE, in consideration of the mutual promises and covenants
contained herein and in the Rights Agreement, the parties hereto agree as
follows:     
   
  1. Section 1(a) of the Rights Agreement is hereby amended to read in its
entirety as follows:     
     
    "(a) "Acquiring Person" shall mean any Person who or which, together with
  all Affiliates and Associates of such Person, shall after the acquisition
  by such Person (or by such Person's Affiliates or Associates) on or after
  July 16, 1990 of Beneficial Ownership of Common Shares be the Beneficial
  Owner of 15% or more of the Common Shares then outstanding (the number of
  Common Shares then outstanding being the number set forth in the then most
  recently available filing by the Company pursuant to the Exchange Act) but
  shall not include (i) the Company, any Subsidiary of the Company, any
  employee benefit plan of the Company or of any of its Subsidiaries or any
  Person holding Common Shares for or pursuant to the terms of any such
  employee benefit plan; (ii) any Person who becomes a Beneficial Owner of
  15% or more of the Common Shares then outstanding and who, within 5
  Business Days of the public announcement by the Company or such Person that
  such Person has acquired such Beneficial Ownership, divests itself of a
  sufficient number of Common Shares so that it is no longer the Beneficial
  Owner of 15% or more of the then outstanding Common Shares; (iii) Ford
  Motor Company, a Delaware corporation ("Ford"), provided that Ford does not
  acquire Beneficial Ownership of Common Shares except as permitted pursuant
  to Section 3.2(a)(i), Section 3.2(e) or Section 3.2(f) of the Investment
  Agreement between the Company and Ford dated as of July 16, 1990 (the "Ford
  Investment Agreement"), or pursuant to the Option Agreement (as defined in
  such Investment Agreement); (iv) the Trustee and the Trust (as such terms
  are defined in the Consent and Amendment dated as of December 29, 1993 (the
  "Consent and Amendment") between the Company and Tenneco Inc., a Delaware
  corporation ("Tenneco"), provided that the Trustee does not acquire
  Beneficial Ownership of Common Shares except as permitted pursuant to (x)
  Section 3.2(a)(i), Section 3.2(d) or Section 3.2(e) of the Investment
  Agreement between the Company and Tenneco dated as of July 16, 1990 (the
  "Tenneco Investment Agreement") or (y) the Consent and Amendment; or (v)
  Kubota Corporation, a Japanese corporation ("Kubota"), provided that Kubota
  does not acquire Beneficial Ownership of Common Shares except as permitted
  to Section 3.2(a)(i), Section 3.2(d) and Section 3.2(e) of the Investment
  Agreement between the Company and Kubota dated as of July 16, 1990 (the
  "Kubota Investment Agreement")."     
   
  2. Section 1(b) of the Rights Agreement is hereby amended to read in its
entirety as follows:     
     
    "(b) "Affiliate" and "Associate", when used with reference to any Person,
  shall have the respective meanings ascribed to such terms in Rule 12b-2 of
  the General Rules and Regulations under the Securities Exchange Act of
  1934, as in effect on the date hereof, provided, however, that (i) the
  Trustee shall not be deemed to be controlled by, or under common control
  with, any other Person, (ii) no trust or estate as to which the Trustee
  serves as trustee or in a similar fiduciary capacity shall be deemed to be
  an Associate of the Trust and (iii) no Person shall be considered to be
  controlled by the Trust, and no Common Shares shall be considered owned by
  the Trust, unless the Trustee has such control or such ownership in its
  capacity as Trustee and not in any other capacity."     
<PAGE>
 
   
  3. Section 1(c) of the Rights Agreement is hereby amended to read in its
entirety as follows:     
     
    "(c) "A Person shall be deemed the "Beneficial Owner" of, and shall be
  deemed to "beneficially own" any securities:     
       
      (i) which such Person or any of such Person's Affiliates or
    Associates beneficially owns, directly or indirectly;     
       
      (ii) which such Person or any of such Person's Affiliates or
    Associates has (A) the right to acquire (whether such right is
    exercisable immediately or only after the passage of time) pursuant to
    any agreement, arrangement or understanding, or upon the exercise of
    conversion rights, exchange rights, rights (other than rights issuable
    under this Rights Agreement), warrants or options, or otherwise;
    provided, however, that a Person shall not be deemed the Beneficial
    Owner of, or to beneficially own, securities tendered pursuant to a
    tender or exchange offer made by or on behalf of such Person or any of
    such Person's Affiliates or Associates until such tendered securities
    are accepted for purchase or exchange thereunder; or (B) the right to
    vote pursuant to any agreement, arrangement or understanding; provided,
    however, that a Person shall not be deemed the Beneficial Owner of, or
    to beneficially own, any security if the agreement, arrangement or
    understanding to vote such security (1) arises solely from a revocable
    proxy given to such Person in response to a public proxy or consent
    solicitation made pursuant to, and in accordance with, the applicable
    rules and regulations under the Exchange Act and (2) is not also then
    reportable on Schedule 13D under the Exchange Act (or any comparable or
    successor report); or     
       
      (iii) which are beneficially owned, directly or indirectly, by any
    other Person with which such Person or any of such Person's Affiliates
    or Associates has any agreement, arrangement or understanding (whether
    or not in writing), for the purpose of acquiring, holding, voting
    (except pursuant to a revocable proxy as described in clause (B) of
    subparagraph (ii) of this paragraph (c)) or disposing of any securities
    of the Company.     
   
  Notwithstanding the foregoing, in accordance with the terms of the Consent
and Amendment, Tenneco will be deemed to be the Beneficial Owner of all the
Common Shares held or controlled by the Trust (other than the Common Shares
specified in Section 5(b)(1)(B) of the Consent and Amendment)."     
   
  4. Section 1(hh) of the Rights Agreement is hereby amended to read in its
entirety as follows:     
     
    "(hh) "Tender Offer Date" shall mean the first date of the commencement
  of, or first public disclosure of the intent of any Person (other than (w)
  the Company, any Subsidiary of the Company, any employee benefit plan of
  the Company or of any of its Subsidiaries or any Person holding Common
  Shares for or pursuant to the terms of any such employee benefit plan, (x)
  Ford in connection with its making of an offer in accordance with Section
  3.2(a)(i) or Section 3.2(f) of the Ford Investment Agreement, (y) the
  Trustee in connection with its making of an offer in accordance with the
  final provision of Section 3.2(e) of the Tenneco Investment Agreement or
  (z) Kubota in connection with its making of an offer in accordance with the
  final provision of Section 3.2(a)(i) or Section 3.2(e) of the Kubota
  Investment Agreement) to commence a tender or exchange offer for 20% or
  more of the outstanding Common Shares (including any such date which is
  after the date of this Rights Agreement and prior to the issuance of the
  Rights)."     
   
  5. Section 11(d)(i) of the Rights Agreement is hereby amended to read in its
entirety as follows:     
     
    "Notwithstanding any provision of this Rights Agreement, a Triggering
  Event shall not be deemed to have occurred solely as a result of (i) any of
  Ford, the Trustee or Kubota becoming the Beneficial Owner of Common Shares
  as permitted pursuant to (x) in the case of Ford, Section 3.2(a), Section
  3.2(e) or Section 3.2(f) of the Ford Investment Agreement, (y) in the case
  of the Trustee, Section 3.2(a), Section 3.2(d) or Section 3.2(e) of the
  Tenneco Investment Agreement or, in the case of any Transferee, pursuant
      
                                       2
<PAGE>
 
     
  to the terms of the Consent and Amendment or (z) in the case of Kubota,
  Section 3.2(a), Section 3.2(d) or Section 3.2(e) of the Kubota Investment
  Agreement or (ii) Ford becoming the Beneficial Owner of Common Shares as
  permitted by the Option Agreement."     
   
  6. Except as expressly amended hereby, the Rights Agreement shall remain in
full force and effect.     
   
  IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 7 to
the Rights Agreement to be duly executed and their respective corporate seals
to be hereunto affixed and attested, all as of the day and year first above
written.     
                                             
                                          CUMMINS ENGINE COMPANY, INC.     
                                             
                                          By: _____________________________    
                                                
                                             Peter B. Hamilton     
                                                
                                             Vice President and Chief
                                              Financial Officer     
   
[SEAL]     
   
Attest:     
 
- -------------------------------
   
Steven L. Zeller     
   
Secretary     
                                             
                                          THE FIRST NATIONAL BANK OF CHICAGO,
                                           as Rights Agent     
                                             
                                          By: _____________________________    
                                                
                                             Michael R. Phalen     
                                                
                                             Vice President     
   
[SEAL]     
   
Attest:     
 
- -------------------------------
 
                                       3

<PAGE>
 
                        INVESTMENT MANAGEMENT AGREEMENT
 
  This Agreement is effective as of the 27th day of December, 1993, among the
INVESTMENT COMMITTEE OF THE TENNECO INC. GENERAL EMPLOYEE BENEFIT TRUST (the
"Committee"), WOODBRIDGE CAPITAL MANAGEMENT, INC., a registered Investment
Adviser as that term is defined in the Investment Advisers Act of 1940 with
headquarters in Detroit, Michigan (the "Manager"), and TENNECO INC., a Delaware
corporation ("Tenneco").
 
                                    RECITALS
 
  Tenneco by Trust Agreement with Bankers Trust Company (the "Trustee") has
established the Tenneco Inc. General Employee Benefit Trust (the "Trust") for
the collective investment and reinvestment of assets from pension plans of
Tenneco and related companies.
   
  The Trust Agreement states that the Trust shall be administered by the
Committee and provides for the appointment by the Committee from time to time
of an "Investment Manager", as that term is defined in Section 3 (38) of the
Employee Retirement Income Security Act of 1974, as amended ("ERISA"), to
manage designated assets of the Trust.     
 
  The Committee has determined that the Manager should be retained to manage a
portfolio of certain assets initially consisting of Cummins Stock (as defined
in Paragraph 4 below). Tenneco purchased 1,600,000 shares of the Cummins Stock
pursuant to that certain Investment Agreement by and between Tenneco and
Cummins Engine Company, Inc. ("Cummins"), dated July 16, 1990 (the "Tenneco-
Cummins Agreement"), and acquired the remaining 1,600,000 shares of the Cummins
Stock pursuant to a two-for-one stock split. The Cummins Stock will be
transferred to Case Corporation ("Case"), a wholly-owned subsidiary of Tenneco,
which will contribute the Cummins Stock to the Case Corporation Pension Plan
for Hourly-Paid Employees, immediately after which the Cummins Stock will
automatically become an asset of the Trust. The Manager has determined that the
acceptance by the Trust of the Cummins Stock as a contribution from Case is
prudent.
   
  NOW, THEREFORE, the parties hereto agree as follows:     
 
  1. Appointment of the Manager. The Committee appoints the Manager to direct
and manage the investment of designated Trust assets, as specified from time to
time by the Committee, in a special account (the "Account") created solely for
the management of investments pursuant to this Agreement. The Manager accepts
the Committee's appointment and agrees to perform in accordance with the
provisions of this Agreement. The Committee represents that employment of the
Manager is authorized by, has been accomplished in accordance with, and does
not violate, the documents governing the Account.
 
  2. The Account. Subject to Paragraph 3 hereof, the Account will consist of
those Trust assets that the Committee shall direct the Trustee to hold in a
segregated account plus all investments, proceeds of sale, income (other than
as provided in the following sentence), and appreciation less depreciation and
withdrawals. Any and all cash dividends paid with respect to the Cummins Stock
shall not become part of the Account but shall be a general asset of the Trust
which shall be treated as directed by the Committee from time to time. The
amount of assets in the Account and the procedures may be adjusted from time to
time by the Committee upon notice to the Manager. For purposes of this
Paragraph 2, such notice shall be in writing, but may be given verbally if
confirmed in writing as soon as practicable thereafter. The Manager shall have
no authority to take possession of any assets of the Account or any proceeds
derived from these assets and shall have no authority or responsibility for the
custody and safekeeping of assets comprising the Account, except that the
Manager shall notify the Trustee and the Committee of any material
irregularities that come to the Manager's attention.
 
  3. Responsibilities of the Manager. The Manager shall have full
responsibility for the investment of assets of the Account, including, without
limitation, the responsibility to vote the Cummins Stock, subject to the rules
of Paragraph 5 hereof. Subject to the limitations set forth in Paragraph 5
hereof, the Manager shall have full authority to issue instructions to such
brokers and banks as the Manager may select to purchase,
<PAGE>
 
sell and otherwise trade in and deal with the securities of the Account, and,
complying with Section 28(e) of the Securities Exchange Act of 1934, may pay
commissions on transactions in excess of the amount of commission another
broker or dealer would have charged. This may result in incurring commissions
for the Account from time to time to cover such services which, in Manager's
opinion assist in the supervision of the Account. The Manager shall comply with
the provisions of Exhibit I attached hereto and made a part hereof. Further,
the Manager shall comply with all laws and regulations issued from time to time
by any governmental, administrative or other body that relate to the discharge
of its duties under this Agreement and, without limiting the generality of the
foregoing, shall discharge such duties in accordance with ERISA.
 
  4. Investment. The assets of the Account shall consist exclusively of (i)
shares of the common stock ("Cummins Stock") of Cummins, which shares shall
initially be 3,200,000 shares of Cummins Stock, and any assets distributed with
respect thereto, except as provided in Paragraph 2 hereof, (ii) cash equivalent
securities described in Exhibit I hereto, or (iii) a combination thereof. The
Manager upon request of the Committee shall transfer all investment
responsibility for cash and cash equivalents to such other manager, trustee or
entity as the Committee may from time to time direct. The Manager shall have no
liability for acting in accordance with the Committee's direction or for the
investment performance of such other manager, trustee or entity.
 
  5. Tenneco-Cummins Investment Agreement. Tenneco is prohibited from
transferring the Cummins Stock by the Tenneco-Cummins Agreement. Pursuant to
that certain Amendment to the Tenneco-Cummins Agreement dated as of December
29, 1993 (the "Amendment"), Cummins consented to the transfer by Tenneco to the
Trust of the 3,200,000 shares of Cummins Stock. The Trust is bound by the
Tenneco-Cummins Agreement and the Amendment with respect, among other matters,
to restrictions of the transfer of Cummins Stock and the voting of Cummins
Stock. The Manager shall manage the Account consistent with the Tenneco-Cummins
Agreement, as amended. All rights of Tenneco under the Tenneco-Cummins
Agreement are transferred and assigned to the Trust except that the right to
designate a person for election to the Cummins Board of Directors shall be
exercised by the Manager pursuant to the direction of the Committee; provided,
that the Manager may decline to designate the person whom the Committee directs
it to designate if it determines that the exercise of its fiduciary duty under
ERISA requires it so to decline.
   
  6. Contribution Obligation. For each calendar quarter that the Trust holds
all or any portion of the 3,200,000 shares of Cummins Stock originally
contributed to the Trust as contemplated by this Agreement, Tenneco and/or one
or more of its subsidiaries will contribute to one or more of the plans funded
by the Trust an amount in cash equal to the product, but not less than zero, of
(i) the number of shares of Cummins Stock held in the Account on the last
trading day of a calendar quarter, multiplied by (ii) the difference obtained
by subtracting (x) the closing price of one share of Cummins Stock in the New
York Stock Exchange ("NYSE") on the last trading day of that quarter from (y)
the Lowest Price, as defined below. Such payment shall be made no later than 30
days after the end of the quarter to which it relates. Any corporate
reorganization or other similar transaction affecting the number of shares of
Cummins Stock held in the Account will be equitably reflected in a readjustment
of the preceding sentence. The "Lowest Price" means the lesser of (iii) $52
5/8; or (iv) the lowest closing price per share on the NYSE on the last trading
day of any prior calendar quarter with respect to which a payment was
previously required to be made under the rules of this Paragraph 6. In the
event that the Trust sells any of the Cummins Stock held in the Account after
July 31, 1996, Tenneco shall pay to the Trust an amount in cash equal to the
product, but not less than zero, of (i) the number of shares of Cummins Stock
so sold, multiplied by (ii) the difference obtained by subtracting (x) the
gross price realized on such sale from (y) the Lowest Price. Tenneco's
obligations under this Paragraph 6 shall be legally enforceable by the Manager,
and Tenneco shall bear all costs of enforcement, including without limitation,
reasonable attorney's fees. As collateral security for Tenneco's obligations
under this Paragraph 6, Tenneco shall maintain a letter of credit substantially
in the form attached hereto as Exhibit II in favor of the Trust in an amount
equal to the product of 3,200,000 (or such lower number of shares of Cummins
Stock as may hereafter be in the Account on the date of renewal of the letter
of credit, subject to appropriate adjustment in the event of a stock split,
reverse stock split or other stock adjustment) multiplied     
 
                                       2
<PAGE>
 
   
by 52 5/8 and then by 20%. In the event Tenneco shall fail to make any and all
payments as required under the rules of this Paragraph 6 when due, the Trust
shall have the right to draw on such letter of credit in accordance with the
terms thereunder in the amount of such failed payment. Tenneco shall notify
Manager of any contribution made in accordance with this Paragraph 6, no later
than five (5) days after the contribution is made, and Tenneco shall furnish
Manager with such supporting documentation as Manager may reasonably request
with respect to its compliance with this Paragraph 6.     
   
  7. Fees. For services under this Agreement, the Manager shall be entitled to
receive a fee each quarter. Such fee shall be paid by Tenneco, but if Tenneco
shall fail to pay the fee within 30 days of the date on which it is due, the
Trust shall pay the fee. The amount of the fee each quarter shall be a
percentage of the net assets of the Account. The percentages are set forth in
Exhibit III to this Agreement and the method for computing the "net assets" is
as follows:     
     
    (a) The quarterly fee calculation shall be based upon the quotient
  derived by dividing by three the sum obtained by adding the asset values
  for each month of the calendar quarter; the asset value for any month shall
  be equal to the market value of the assets, exclusive of accrued income,
  under the management of the Manager under this Agreement as of the close of
  business, on the last business day of such month.     
     
    (b) The quarterly fee shall be payable by Tenneco within thirty days
  after the receipt and approval by the Committee of a statement from the
  Manager setting forth a detailed calculation of such fee. In the event that
  the effective date of this Agreement is after the first trading day of a
  calendar quarter, or the Agreement is terminated prior to the last trading
  day of a calendar quarter, the fee for such quarter shall be prorated
  according to the proportion which the number of days in which this
  Agreement was in effect during such quarter bears to 91.25. The term
  "trading day" means a day on which the New York Stock Exchange is open for
  business.     
     
    (c) For the purpose of determining the fee, assets shall be valued as of
  the close of business on the day of determination in such manner as will,
  in the judgment of the Trustee, most accurately reflect their market value;
  provided that the Committee or the Manager may, by written notice given to
  Trustee and to the other parties to this Agreement within thirty days of
  the receipt of any such valuation, dispute the correctness of such
  valuation; the ultimate decision of the Trustee, after consideration of any
  dispute notices, shall be final.     
 
  8. Other Investment Activities of Manager. The Manager and its officers may
act and continue to act as investment managers for others, and nothing in this
Agreement will in any way be deemed to restrict the right of the Manager to
perform investment management or other services for Tenneco; provided that the
income which Manager and its affiliates derive from Tenneco will, in no event,
exceed 1% of the gross income of the Manager and its affiliates. Nothing in
this Agreement limits or restricts the Manager or any of its officers,
affiliates or employees from trading in any securities for its or their own
account or accounts. The Committee acknowledges that the Manager and its
officers, affiliates or employees, and its other clients may at any time have,
acquire, increase, decrease or dispose of a position in investments which are
at the same time being acquired for the Trust. The Manager shall not be obliged
to acquire for the Trust a position in any investment which the Manager, its
officers, affiliates or employees may acquire for its or their own accounts or
for the account of another client, if in the sole discretion of the Manager, it
is not feasible or desirable to acquire a position in such investment for the
Trust.
 
  9. Limitation of Manager's Liability. Manager's authority hereunder shall not
be impaired because of the fact that the Manager may effect transactions with
respect to securities for its own account or for the accounts of others that it
manages. These transactions may involve identical or similar securities and may
be executed at the same or different times. Except for negligence or
malfeasance, or violation of applicable law, neither the Manager, nor any of
its officers, directors, employees or agents shall be liable hereunder for any
action performed or omitted to be performed or for any errors of judgment in
managing the Account; provided, however, as the federal securities laws impose
liabilities under certain circumstances on persons
 
                                       3
<PAGE>
 
who act in good faith, nothing herein shall in any way constitute a waiver or
limitation of any rights that the Committee may have under any federal
securities laws. If any loss is suffered due to the acts or omissions of a
custodian to which Manager has given investment instructions pursuant to the
authority granted herein, the Trust will look to the custodian, and not to
Manager, for restitution and recovery.
 
  10. Acknowledgment and Representation. The Manager acknowledges that it is a
fiduciary with respect to the plans participating in the Trust within the
meaning of Section 3 (21) (A) of ERISA. The Manager represents that the
execution of this Agreement has been duly authorized and agrees to provide such
supporting documentation of its authorization and good standing as the
Committee from time to time may reasonably request. Committee agrees to obtain
and maintain a bond, satisfying the requirements of Section 412 of ERISA, and
to include Manager and its agents among those insured under that bond.
 
  11. Annual Report. At least once during each period of twelve months, the
Manager shall provide an annual report on its investment performance in writing
to the Committee. The Manager shall render such other reports as shall be
requested by the Committee from time to time. The Manager does not assume
responsibility for the accuracy of information furnished by the Committee,
Tenneco or any other person associated with the Trust.
 
  12. No Assignment. As this Agreement is based upon the special investment
characteristics of the Manager, neither party may assign its rights or
obligations under this Agreement except upon the express written consent of the
other.
 
  13. Term. This Agreement will commence on the effective date and will
continue until terminated by either party, at its sole discretion, upon thirty
days written notice to the other party. Fees shall be prorated to the date of
termination.
 
  14. Applicable Law. This Agreement shall be construed according to the
internal laws of the State of Michigan, except as superseded and preempted by
ERISA or other laws of the United States.
 
  15. Notice. All written notices under this Agreement shall be sent certified
mail, with postage prepaid and return receipt requested, to the addresses
listed below or to such other address as either party hereto shall notify the
other party of in writing pursuant to the provisions of this Paragraph 15.
Notices given pursuant to the provisions hereof shall be deemed given when
received at the appropriate address.
   
  (a) To the Committee:     
 
Richard A. Robinson
   
Tenneco Inc.     
P.O. Box 2511
Houston, Texas 77252-2511
   
  (b) To the Trustee:     
 
Bankers Trust Company of the Southwest
3000 Two Houston Center
909 Fannin, Suite 3000
Houston, Texas 77010
   
ATTN: Thomas Calabro, Jr.     
   
  (c) To the Manager:     
   
Woodbridge Capital Management, Inc.     
Renaissance Center 100 Tower
Detroit, Michigan 48243
   
ATTN: Charles W. Brown, Director of Institutional Equity Management     
 
  Manager shall be fully protected in acting upon any such communication which
it considers to be authentic.
 
                                       4
<PAGE>
 
  16. Complete Agreement. This Agreement, together with the Exhibits hereto and
the Manager's letter to the Committee of even date herewith, constitutes the
complete agreement of the parties concerning the retention of the Manager and
cannot be amended or modified except in writing signed by authorized
representatives of the parties.
 
  17. Receipt of Disclosure Statement. The Committee acknowledges receipt of
the Manager's Disclosure Statement, as require by Rule 204-3 under the
Investment Advisers Act of 1940, not less than 48 hours prior to the execution
of this Agreement.
 
  IN WITNESS WHEREOF, each of the parties has duly executed this Agreement.
 
                                          WOODBRIDGE CAPITAL MANAGEMENT, INC.,
                                                     
                                                  Charles W. Brown     
                                             
                                          By: _____________________________    
 
                                          Its: Director of Institutional
                                           Equity Management
 
                                          INVESTMENT COMMITTEE OF THE
                                          TENNECO INC. GENERAL EMPLOYEE
                                          BENEFIT TRUST
                                                    
                                                 Robert T. Blakely     
                                             
                                          By:_____________________________     
 
                                          Its: Chairman
                                             
                                          TENNECO INC.     
                                                       
                                                    M. W. Meyer     
                                             
                                          By: _____________________________    
 
                                          Its: Vice President
 
                                       5
<PAGE>
 
                                   EXHIBIT I
 
  This Exhibit is a modification of the generally applicable rules, and it
applies only to Woodbridge Capital Management, Inc. as an investment manager
(the "Manager"). Any exception to these rules must receive prior approval in
writing from the Investment Committee of the Tenneco Inc. General Employee
Benefit Trust (the "Committee"). Capitalized terms not defined in this Exhibit
shall have the meanings ascribed to them in the Investment Management Agreement
to which this Exhibit is a part.
                                       
                                    I.     
                                 GENERAL POLICY
 
  The Manager shall be responsible for regular communication with the Committee
on all significant matters pertaining to investment policies, objectives, and
the management of pension fund assets. In addition, the Manager shall promptly
notify the Committee of significant changes in the ownership, organization
structure, financial condition, or senior personnel staffing of the Manager.
   
  The Manager shall use its established investment philosophy and strategy
subject to the "prudent expert" rule and the following requirements:     
     
    A. Three written quarterly performance reviews will be provided by the
  Manager to the Tenneco Pension Officer. In addition, as soon as practical
  after the end of each year, a full review of the year's performance shall
  be conducted by the Committee. Representatives of the Manager shall be
  present to answer questions.     
     
    B. The portfolio of the Manager shall be subject to independent audit by
  third parties, as requested by the Committee.     
     
    C. It is the responsibility of the Manager to assure compliance with
  applicable law.     
 
                                      II.
                                  COMMON STOCK
 
  No unregistered or restricted stock shall be included in the portfolio,
except the Cummins Stock initially deposited with the Manager hereunder and any
stock which may be distributed with respect thereto.
 
                                      III.
                           CASH EQUIVALENT SECURITIES
   
  The amount of assets invested in cash equivalent securities is not limited.
The Manager may either elect to have the Trustee "sweep" uninvested cash daily
into a Short Term Investment Fund managed by Fisher Francis Trees & Watts, Inc.
or may invest cash directly in eligible cash equivalent securities. Investments
in the following cash equivalent securities are acceptable but, with the single
exception of securities whose principal and interest are guaranteed by the U.S.
Government, are limited to 5% of a portfolio with any single entity (provided,
that the 5% entity limitation will be waived whenever a purchase of less than
$2.5 million in any single issue is required):     
     
    A. There are no limits on investments in Treasury bill holdings.     
     
    B. Investments in bankers acceptances and certificates of deposit shall
  be confined to those issued by any U.S. bank whose consolidated total
  assets exceed $5 billion and which is rated B/C or better with BankWatch
  Proprietary Credit Ratings and Consulting Service (formerly Keefe Bruyette
  and Woods).     
 
                                       6
<PAGE>
 
     
    C. Investments in commercial paper shall be restricted to only those
  companies carrying either an A1 or P1 rating. U.S. bank commercial paper
  may only be purchased if the bank's consolidated total assets exceed $5
  billion and in addition to the A1/P1 rating has a minimum of a B/C
  BankWatch rating.     
     
    D. Investments in repurchase/resale agreements shall be restricted to
  those issued by any U.S. bank whose consolidated total assets exceed $5
  billion and which is rated B/C or better by BankWatch, and to those issued
  by brokerage firms which are deemed acceptable by the Investment Committee.
  Because the credit worthiness of broker/dealers can change rapidly, it is
  the responsibility of the Tenneco Pension Officer to maintain an updated
  list of high quality broker/dealer firms.     
     
    E. Repurchase/resale agreements are to be fully collateralized by U.S.
  Treasury securities, which are held by the Trustee under procedures
  established between the Trustee and the Trust. Collateral will have a
  market value, including accrued interest, equal to or greater than the
  amount invested in the resale agreement. Individual maturities will not
  exceed five business days. No more than 25% of a portfolio will be invested
  in resale agreements, and no more than 10% of a portfolio may be placed
  with any single bank or dealer.     
     
    F. Investments in master note agreements shall be restricted to those
  whose issuer holds a commercial paper rating of either A1 of P1, or, if
  issued by a U.S. bank, whose consolidated total assets exceed $5 billion
  and which is rated B/C or better by BankWatch.     
 
 
                                       7
<PAGE>
 
                                   
                                EXHIBIT II     
                                
                             [FORM OF CREDIT]     
   
DATE: DECEMBER , 1993     
   
IRREVOCABLE DOCUMENTARY CREDIT NUMBER: C7234200     
                                                   
           BENEFICIARY                             APPLICANT
                                                
   BANKERS TRUST COMPANY, AS                       TENNECO INC.
                                                
    TRUSTEE OF THE TENNECO INC.                    1010 MILAM STREET 
                                                   
    GENERAL EMPLOYEE BENEFIT TRUST                 HOUSTON, TX 77252     
      
   3000 TWO HOUSTON CENTER     
                                                     
   909 FANNIN, SUITE 3000                             AMOUNT     
                                                   
   HOUSTON, TEXAS 77010                            USD ____________________    
                                                   
   ATTN: MR. THOMAS CALABRO, JR.                     AND 00/100'S US DOLLARS
                                                       
                                                      
                                                     EXPIRY     
                                                      
                                                   DECEMBER   , 1994 AT OUR
                                                   COUNTERS     
   
LADIES AND GENTLEMEN:     
   
  AT THE REQUEST AND FOR THE ACCOUNT OF TENNECO INC. ("TENNECO"), WE
CONTINENTAL BANK N.A., (THE "BANK"), ESTABLISH THIS IRREVOCABLE LETTER OF
CREDIT (THE "LETTER OF CREDIT") IN THE AGGREGATE AMOUNT OF U.S. $    OR UPON
ANY DATE OF RENEWAL OF THIS LETTER OF CREDIT IN AN AGGREGATE AMOUNT IN UNITED
STATES DOLLARS EQUAL TO THE PRODUCT OF 3,200,000 (OR SUCH LOWER NUMBER OF
SHARES OF CUMMINS STOCK (AS DEFINED IN SECTION 4 OF THE INVESTMENT MANAGEMENT
AGREEMENT DESCRIBED BELOW) AS MAY HEREAFTER BE IN THE ACCOUNT (AS DEFINED IN
THE INVESTMENT MANAGEMENT AGREEMENT DESCRIBED BELOW) ON THE DATE OF RENEWAL OF
THIS LETTER OF CREDIT, SUBJECT TO APPROPRIATE ADJUSTMENT IN THE EVENT OF A
STOCK SPLIT, REVERSE STOCK SPLIT OR OTHER STOCK ADJUSTMENT) MULTIPLIED BY
AND THEN BY 20% (THE "LETTER OF CREDIT AMOUNT"), IN YOUR FAVOR AS TRUSTEE (THE
"TRUSTEE") UNDER THAT CERTAIN TRUST AGREEMENT DATED AS OF JANUARY 1, 1971 AS
THE SAME MAY FROM TIME TO TIME BE SUPPLEMENTED OR AMENDED (THE "TRUST
AGREEMENT") BETWEEN YOU AND TENNECO WHICH ESTABLISHED THE TENNECO INC. GENERAL
EMPLOYEE BENEFIT TRUST (THE "TRUST"). THIS LETTER OF CREDIT IS ISSUED PURSUANT
TO THAT CERTAIN INVESTMENT MANAGEMENT AGREEMENT BETWEEN TENNECO, THE
INVESTMENT COMMITTEE OF THE TRUST AND WOODBRIDGE CAPITAL MANAGEMENT, INC.
DATED AS OF DECEMBER   , 1993 (THE "INVESTMENT MANAGEMENT AGREEMENT").     
   
  THIS LETTER OF CREDIT SHALL EXPIRE AT 5:00 P.M. CHICAGO TIME ON DECEMBER   ,
1994. IT IS A CONDITION OF THIS LETTER OF CREDIT THAT IT BE DEEMED
AUTOMATICALLY EXTENDED FOR ONE YEAR FROM THE CURRENT EXPIRATION DATE OR ANY
FUTURE AUTOMATICALLY EXTENDED DATE FOR A ONE YEAR PERIOD BUT NO LATER THAN
AUGUST 31, 1996, UNLESS WE NOTIFY YOU BY REGISTERED MAIL SIXTY
    
<PAGE>
 
          
       THIS IS AN INTEGRAL PART OF LETTER OF CREDIT NUMBER: C7234200     
   
DAYS PRIOR TO THE THEN CURRENT EXPIRATION DATE THAT WE ELECT NOT TO RENEW THIS
LETTER OF CREDIT FOR ANY SUCH ADDITIONAL PERIOD. IN ANY EVENT THE FINAL
EXPIRATION DATE OF THIS LETTER OF CREDIT IS AUGUST 31, 1996 (THE "EXPIRATION
DATE").     
   
  SUBJECT TO THE PROVISIONS OF THIS LETTER OF CREDIT, DEMAND FOR PAYMENT UNDER
THIS LETTER OF CREDIT MAY BE MADE BY YOU PRIOR TO THE EXPIRATION DATE BY
PRESENTATION OF A DULY EXECUTED CERTIFICATE IN THE FORM OF ANNEX A (A "DRAWING
CERTIFICATE"). THE DRAWING CERTIFICATE SHALL BE PRESENTED TO US AT 231 SOUTH
LASALLE STREET, CHICAGO, IL 60697 ATTENTION LETTER OF CREDIT DIVISION OR BY
RAPIFAX (AT TELECOPIER NUMBER 312-987-6828 OR TELEX (AT TELEX NUMBER 02-5233
ANSWERBACK CONTILEK CGO) (OR AT SUCH OTHER ADDRESS, RAPIFAX OR TELEX NUMBER IN
THE UNITED STATES AS WE MAY DESIGNATE IN A WRITTEN NOTICE DELIVERED TO YOU), ON
ANY BUSINESS DAY (HEREINAFTER DEFINED) (SUCH DEMAND AND PRESENTATION, A
"DRAWING"). IF ANY DRAWING IS MADE BY TESTED TELEX OR RAPIFAX, YOU SHALL
DELIVER EXECUTED ORIGINALS OF THE DRAWING CERTIFICATE AS SOON AS POSSIBLE
FOLLOWING SUCH DRAWING, PROVIDED, HOWEVER, THAT FAILURE TO DELIVER SUCH DULY
EXECUTED DRAWING CERTIFICATE SHALL NOT ALTER THE LIABILITY OF THE BANK TO MAKE
PAYMENT AS PROVIDED HEREIN. SUCH DRAWING CERTIFICATE SHALL BE SIGNED BY YOUR
PURPORTED OFFICER, WITH ALL BLANKS COMPLETED AND DELETIONS MADE IN ACCORDANCE
WITH THE DIRECTIONS TO DO SO, IF ANY, CONTAINED IN THE FORM OF DRAWING
CERTIFICATE.     
   
  PAYMENT AGAINST CONFORMING DOCUMENTS PRESENTED UNDER THIS LETTER OF CREDIT ON
ANY DATE ON WHICH BANKING INSTITUTIONS IN CHICAGO ARE OPEN FOR BUSINESS (A
"BUSINESS DAY") PRIOR TO THE EXPIRATION DATE SHALL BE MADE BY US NO LATER THAN
3:00 P.M. CHICAGO TIME ON THE THIRD BUSINESS DAY FOLLOWING PRESENTATION.     
   
  PAYMENTS MADE HEREUNDER SHALL BE MADE WITH IMMEDIATELY AVAILABLE MONIES BY
WIRE TRANSFER, EVIDENCED BY DELIVERY TO TENNECO OF A FEDERAL RESERVE BANK WIRE
TRANSFER CONFIRMATION NUMBER, TO BANKERS TRUST COMPANY, AS TRUSTEE OF THE
TENNECO INC. GENERAL EMPLOYEE BENEFIT TRUST, ABA 021001033, FOR CREDIT TO
ACCOUNT NUMBER 100794 FOR THE BENEFIT OF THE TENNECO INC. GENERAL EMPLOYEE
BENEFIT TRUST, ATTENTION: KIM MINTON, REFERENCE 99917985 (OR TO SUCH OTHER
ACCOUNT NUMBERS OR ADDRESSES AS YOU MAY FROM TIME TO TIME DESIGNATE BY WRITTEN
NOTICE TO US).     
   
  COMMUNICATIONS WITH RESPECT TO THIS LETTER OF CREDIT SHALL BE ADDRESSED TO US
AT 231 SOUTH LASALLE STREET, CHICAGO, ILLINOIS 60697 ATTENTION: LETTER OF
CREDIT DIVISION (OR TO SUCH ADDRESS OR PERSON AS WE MAY HEREAFTER DESIGNATE TO
YOU IN WRITING) SPECIFICALLY REFERRING TO THE NUMBER OF THIS LETTER OF CREDIT.
       
  TO THE EXTENT NOT INCONSISTENT WITH THE EXPRESS TERMS HEREOF, THIS
DOCUMENTARY CREDIT IS SUBJECT TO THE "UNIFORM CUSTOMS AND PRACTICE FOR
DOCUMENTARY CREDITS" AND THE RELATED ICC PUBLICATION CURRENTLY IN EFFECT. AS TO
MATTERS NOT GOVERNED BY UNIFORM CUSTOMS, THIS LETTER OF CREDIT SHALL BE
GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF
ILLINOIS, WITHOUT GIVING EFFECT TO ILLINOIS CHOICE OF LAW PRINCIPLES.     
 
                                       2
<PAGE>
 
          
       THIS IS AN INTEGRAL PART OF LETTER OF CREDIT NUMBER: C7234200     
 
  THIS LETTER OF CREDIT, TOGETHER WITH THE ATTACHMENT HERETO, SETS FORTH IN
FULL THE TERMS OF OUR UNDERTAKING, AND SUCH UNDERTAKING SHALL NOT IN ANY WAY BE
MODIFIED, AMENDED OR AMPLIFIED BY REFERENCE TO ANY DOCUMENT, INSTRUMENT OR
AGREEMENT REFERRED TO HEREIN OR TO WHICH THIS LETTER OF CREDIT RELATES, AND ANY
SUCH REFERENCE SHALL NOT BE DEEMED TO INCORPORATE HEREIN BY REFERENCE ANY
DOCUMENT, INSTRUMENT OR AGREEMENT.
 
  IF YOU REQUIRE ANY ASSISTANCE OR HAVE ANY QUESTIONS REGARDING THIS
TRANSACTION, PLEASE CALL 312-828-2685.
 
CONTINENTAL BANK, NATIONAL ASSOCIATION
 
- -------------------------------------     -------------------------------------
                                          
FOR CASHIER                               FOR CASHIER     
 
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<PAGE>
 
                                     
                                  ANNEX A     
                               
                            DRAWING CERTIFICATE     
   
  THE UNDERSIGNED, A DULY AUTHORIZED OFFICER OF BANKERS TRUST COMPANY, AS
TRUSTEE (THE "TRUSTEE") UNDER A CERTAIN TRUST AGREEMENT DATED JANUARY 1, 1971
(THE "AGREEMENT"), BETWEEN TENNECO INC. AND BANKERS TRUST COMPANY, HEREBY
CERTIFIES TO CONTINENTAL BANK N.A. (THE "BANK"), WITH REFERENCE TO LETTER OF
CREDIT NO. C7234200 (THE "LETTER OF CREDIT") ISSUED BY THE BANK IN FAVOR OF THE
UNDERSIGNED THAT:     
     
    1.  THE TRUSTEE IS AUTHORIZED TO MAKE THIS DRAWING UNDER THE LETTER OF
        CREDIT PURSUANT TO THE TERMS OF PARAGRAPH 6 OF THE INVESTMENT
        MANAGEMENT AGREEMENT.     
     
    2.  PURSUANT TO THE INVESTMENT MANAGEMENT AGREEMENT, THE TRUTSEE IS
        DRAWING ON YOU IN THE AMOUNT OF $    WHICH AMOUNT IS HEREBY DEMANDED
        AND YOU ARE HEREBY INSTRUCTED TO REMIT PAYMENT AS PROVIDED IN THE
        LETTER OF CREDIT.     
   
  IN WITNESS WHEREOF, THE TRUSTEE HAS EXECUTED AND DELIVERED THIS CERTIFICATE
AS OF THE     DAY OF      , 19  .     
                                             
                                          BANKERS TRUST COMPANY as Trustee of
                                           the Tenneco Inc. General Employee
                                           Benefit Trust     
                                             
                                          By: _____________________________    
                                                          
                                                       TITLE     
 
<PAGE>
 
                                   
                                EXHIBIT III     
                                      
                                   FEES     
                                 
                              15 basis points     
<PAGE>
 
                                  
                               MODIFICATION     
   
  This Modification sets forth the agreement of the parties hereto as to
certain modifications to the Investment Management Agreement (the "Agreement")
between the Investment Committee of the Tenneco Inc. General Employee Benefit
Trust (the "Committee") and Woodbridge Capital Management, Inc. ("Woodbridge").
The parties hereto intend that this is a modification contemplated by Paragraph
16 of the Agreement.     
   
  The parties hereto agree to the following modifications of the Agreement:
       
    1. The direction of the Committee regarding the designation of a person
  for election to the Board of Directors (the "Board") of Cummins Engine
  Company, Inc. as provided in paragraph 5 of the Agreement may only be made
  in writing.     
     
    2. Tenneco Inc. agrees to indemnify and save Woodbridge harmless from and
  against any liability to which it may be subjected by reason of its service
  under the Agreement.     
   
  In all other respects the Agreement is reconfirmed.     
   
  In witness whereof, the parties hereto have caused this Modification to be
signed by their authorized representatives this 29th day of December, 1993.
                                             
                                          WOODBRIDGE CAPITAL MANAGEMENT, INC.
                                                     
                                                  Charles W. Brown     
                                             
                                          By ______________________________    
                                                
                                             Its Director of Institutional
                                              Equity Management     
                                             
                                          INVESTMENT COMMITTEE OF THE TENNECO
                                           INC. GENERAL EMPLOYEE BENEFIT TRUST
                                                    
                                                 Robert T. Blakely     
                                             
                                          By ______________________________    
                                                
                                             Its Chairman     
                                             
                                          TENNECO INC.     
                                                       
                                                    M. W. Meyer     
                                             
                                          By ______________________________    
                                                
                                             Its Vice President     
 

<PAGE>
 
                                    
                                 AGREEMENT     
   
  THIS AGREEMENT dated as of January 10, 1994, is among TENNECO INC., a
Delaware corporation ("Tenneco"), KERN COUNTY LAND COMPANY, a Delaware
corporation ("Kern County"), and CASE CORPORATION, a Delaware corporation
("Case").     
                                   
                                WITNESSETH:     
   
  WHEREAS, Tenneco has been the beneficial owner of 3,200,000 shares of common
stock (the "Shares") of Cummins Engine Company, Inc., an Indiana corporation
(the "Issuer"), which represents approximately 8.6% of the outstanding voting
shares of the Issuer; and     
   
  WHEREAS, on December 29, 1993, Tenneco transferred the Shares to Kern County,
Kern County transferred the Shares to Case, and Case transferred the Shares to
the Case Corporation Pension Plan for Hourly Paid Employees; and     
   
  WHEREAS, Section 13(d) of the Securities Exchange Act of 1934 (the "Act")
requires that a person who acquires more than five percent of any class of
equity security registered under the Act to file a statement with the
Securities and Exchange Commission setting forth certain required information;
and     
   
  WHEREAS, Rule 13d-1 under the Act permits two or more persons who are
required to file a statement with respect to the same securities to file only
one statement;     
   
  NOW THEREFORE, in consideration of the premises, the parties hereto agree as
follows:     
     
    1. Joint Filing. Tenneco, Kern County and Case shall jointly file a
  Schedule 13D with respect to the Shares and shall jointly file any
  amendment to such Schedule 13D as shall be required by law. Such Schedule
  13D and any amendment thereto shall be filed on behalf of each such person.
         
    2. Responsibility for Accuracy. Each party hereto shall be responsible
  for the completeness and accuracy of the information concerning such party
  contained in such Schedule 13D and in any amendment thereto and shall not
  be responsible for the completeness and accuracy of the information
  concerning the other parties unless such party knows or has reason to
  believe that such information is inaccurate.     
     
    3. Representation. Each party hereto represents that it is eligible to
  file Schedule 13D.     
   
  IN WITNESS WHEREOF, the parties have caused this agreement to be executed as
of the date first written above.     
                                             
                                          TENNECO INC.     
                                                 
                                              M.W. Meyer     
                                             
                                          By: _____________________________    
                                                
                                             M.W. Meyer     
                                                
                                             Vice President     
                                             
                                          KERN COUNTY LAND COMPANY     
                                                 
                                              M.W. Meyer     
                                             
                                          By: _____________________________    
                                                
                                             M.W. Meyer     
                                                
                                             Vice President     
                                             
                                          CASE CORPORATION     
                                                 
                                              Robert G. Simpson     
                                             
                                          By: _____________________________    
                                                
                                             Robert G. Simpson     
                                                
                                             Vice President     


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