GENERAL MOTORS CORP
SC 13D/A, 1995-02-17
MOTOR VEHICLES & PASSENGER CAR BODIES
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                                UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, DC  20549 
                                             

                                 SCHEDULE 13D

                  Under the Securities Exchange Act of 1934
                              (Amendment No. 13)

                          GENERAL MOTORS CORPORATION     
                               (Name of Issuer)

               Class H Common Stock, par value $0.10 per share
                        (Title of Class of Securities)

                                   370442 50 1     
                                (CUSIP Number)

                           Craig A. Alexander, Esq.
               Deputy General Counsel and Assistant Secretary 
                       Howard Hughes Medical Institute
                4000 Jones Bridge Road, Chevy Chase, MD  20815
                           Tel. No. (301) 215-8841                 
           (Name, Address and Telephone Number of Person Authorized
                    to Receive Notices and Communications)

                              February 15, 1995                     
           (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 this statement:  [ ]


                                SCHEDULE 13D

      CUSIP No. 370442 50 1    

       1.  NAME OF REPORTING PERSON 
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON.

                          Howard Hughes Medical Institute
                          I.R.S. Identification No. 59-0735717
       2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP 
                                                              (a) ( )
                                                              (b) ( )
       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

            State of Delaware

        NUMBER OF                         7.  SOLE VOTING POWER
         SHARES                                 17,503,800
      BENEFICIALLY                        8.  SHARED VOTING POWER
        OWNED BY                                0
          EACH
        REPORTING                         9.  SOLE DISPOSITIVE POWER
         PERSON                                 17,503,800
         WITH                            10.  SHARED DISPOSITIVE POWER
                                                0

      11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
           PERSON
                 17,503,800

      12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
           CERTAIN SHARES                                       ( )
      
      13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
           18.8%
      
      14.  TYPE OF REPORTING PERSON
            CO


          Item 1.   SECURITY AND ISSUER

                    Unchanged.

          Item 2.   IDENTITY AND BACKGROUND

                    Unchanged.

          Item 3.   SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

                    Unchanged.

          Item 4.   PURPOSE OF TRANSACTION

                    Unchanged, except as follows (capitalized terms
                    used in this Amendment No. 13 to Schedule 13D
                    and not defined herein have the meaning
                    assigned to them in the Schedule 13D and
                    amendments thereto previously filed by HHMI
                    with respect to its holdings of Class H Stock,
                    in the Class H Stock Agreement, as amended, in
                    the 1992 Agreement or in the Class H Stock Sale
                    Agreement (attached as Exhibit A hereto):
           
                    As previously reported, HHMI, consistent with
                    its goal of prudent diversification of its
                    investment portfolio, intends to reduce its
                    holdings of Class H Stock.  HHMI's holdings of
                    Class H Stock constitute its single largest
                    investment, representing approximately 8.2% of
                    the value of its investment portfolio as of
                    December 31, 1994.  In furtherance of HHMI's
                    diversification goal, and in light of the
                    approaching expiration on March 1, 1995, of
                    restrictions on the sale or exchange of 15
                    million of the 17,503,800 shares of its Class H
                    Stock under the Class H Stock Agreement, HHMI,
                    on February 15, 1995, entered into an agreement
                    with GM ("Class H Stock Sale Agreement"), which
                    provides, among other things, for a registered
                    public offering, with the assistance of GM, of
                    shares of Class H Stock owned by HHMI (the
                    "Offering").  HHMI will determine the number of
                    shares to be offered in the Offering but does
                    not currently intend to offer more than 15
                    million of its shares.  HHMI has agreed to
                    refrain from selling Class H Stock for 90 days
                    following the Offering.  HHMI anticipates that,
                    following the Offering, it would initially hold
                    2-3 million shares of Class H Stock as part of
                    its core investment portfolio and would make
                    decisions with respect to the retention or
                    disposition of such shares in the same manner
                    as it deals with other securities in its
                    portfolio.  HHMI has no current plan or intent
                    to sell any shares of Class H Stock that would
                    remain after the Offering.  Immediately
                    following the Offering, Class H Stock would
                    continue to constitute one of HHMI's largest
                    equity positions.

                    As more fully described in Item 6, below, the
                    Class H Stock Sale Agreement also provides for,
                    among other things, termination of the Class H
                    Stock Agreement (except with regard to the put
                    and call rights with respect to Covered
                    Shares), a limitation on sale (except pursuant
                    to the Offering) of shares of Class H Stock
                    during certain periods, and the right of HHMI
                    to require GM to purchase up to 15 million
                    shares of Class H Stock under certain conditions.

                    Since the filing of Amendment No. 12 to
                    Schedule 13D, HHMI has disposed of 890,200 Core
                    Shares and now holds 2,503,800 Core Shares and
                    15 million Covered Shares.

          Item 5.   INTEREST IN SECURITIES OF THE ISSUER

                    (a)  HHMI owns beneficially 17,503,800 shares
                         of Class H Stock, or approximately 18.8%
                         of the 93,082,758 shares of Class H Stock
                         reported to be outstanding on the cover
                         page of GM's most recent quarterly report
                         for the quarter ended September 30, 1994. 
                         To the best of HHMI's knowledge, none of
                         the other persons named or referred to in
                         the response to Item 2 hereof beneficially
                         owns any shares of Class H Stock.

                    (b)  Unchanged. 

                    (c)  Within the last 60 days, no transactions
                         in shares of Class H Stock were effected
                         by HHMI or, to the best of HHMI's
                         knowledge, by any of the persons named or
                         referred to in response to Item 2 hereof,
                         except the following open market sales on
                         the New York Stock Exchange of Core Shares
                         by HHMI:

                         i)      On January 26, 1995, HHMI sold
                                 200,000 shares of Class H Stock,
                                 at a price of $35.7500;

                         ii)     On January 25, 1995, HHMI sold
                                 150,000 per shares of Class H
                                 Stock at a price of $35.7500 per
                                 share;

                         iii)    On January 24, 1995, HHMI sold
                                 109,000 shares of Class H Stock,
                                 at a price of $35.6250 per share;

                         iv)     On January 23, 1995, HHMI sold
                                 100,000 shares of Class H Stock,
                                 at a price of $36.0000 per share;

                         v)      On January 13, 1995, HHMI sold
                                 331,200 shares of Class H Stock,
                                 at a price of $35.000 per share;

                         vi)     On January 11, 1995, HHMI sold
                                 1,100 shares of Class H Stock, at
                                 a price of $34.625 per share;

                         vii)    On January 10, 1995, HHMI sold
                                 163,200 shares of Class H Stock,
                                 at a price of $34.7032 per share;

                         viii)   On January 9, 1995, HHMI sold
                                 164,700 shares of Class H Stock,
                                 at a price of $34.5112 per share;

                         ix)     On January 9, 1995, HHMI sold
                                 54,000 shares of Class H Stock at
                                 a price of $34.519 per share;

                         x)      On January 6, 1995, HHMI sold
                                 53,600 shares of Class H Stock,
                                 at a price of $34.558;

                         xi)     On January 5, 1995, HHMI sold
                                 84,600 shares of Class H Stock,
                                 at a price of $34.665 per share;

                         xii)    On January 5, 1995, HHMI sold
                                 44,000 shares of Class H Stock,
                                 at a price of $34.75 per share;

                         xiii)   On January 4, 1995, HHMI sold
                                 37,000 shares of Class H Stock,
                                 at a price of $34.966;

                         xiv)    On January 3, 1995, HHMI sold
                                 83,800 shares of Class H Stock,
                                 at a price of $34.925;

                         xv)     On December 30, 1994, HHMI sold
                                 60,200 shares of Class H Stock,
                                 at a price of $35.0631 per share;

                         xvi)    On December 29, 1994, HHMI sold
                                 62,500 shares of Class H Stock,
                                 at a price of $35.0040 per share;

                         xvii)   On December 28, 1994, HHMI sold
                                 25,000 shares of Class H Stock,
                                 at a price of $35.625;

                         xviii)  On December 23, 1994, HHMI sold
                                 108,200 shares of Class H Stock,
                                 at a price of $36.00 per share;
                                 and

                         xix)    On December 22, 1994, HHMI sold
                                 10,000 shares of Class H Stock,
                                 at a price of $35.75 per share;
                                 and

                         xx)     On December 19, 1994, HHMI sold
                                 300,000 shares of Class H Stock,
                                 at a price of $32.50 per share.

                    (d)  Unchanged.

                    (e)  Unchanged.

          Item 6.   CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR
                    RELATIONSHIPS WITH RESPECT TO SECURITIES OF THE ISSUER

                    Unchanged, except as follows (capitalized terms
                    used in this Amendment No. 13 to Schedule 13D
                    and not defined herein have the meaning
                    assigned to them in the Schedule 13D and
                    amendments thereto previously filed by HHMI
                    with respect to its holdings of Class H Stock,
                    in the Class H Stock Agreement, as amended, in
                    the 1992 Agreement or in the Class H Stock Sale
                    Agreement):

                    Pursuant to the Class H Stock Sale Agreement,
                    GM has agreed as soon as practicable to file
                    and cause to become effective a registration
                    statement with respect to the number of shares
                    of Class H Stock owned by HHMI designated by
                    HHMI and to assist in the offering of such
                    shares.  If the proceeds received by HHMI from
                    the Offering of the Class H Stock (net of any
                    underwriting discounts or commissions and any
                    expenses incurred in connection with the
                    Offering) exceed the amount obtained by
                    multiplying the number of shares sold by HHMI
                    in the Offering (including any shares sold
                    pursuant to an over-allotment option) and
                    $37.50, then HHMI shall pay such excess (plus
                    interest from the day following the closing of
                    the Offering until the date of payment) to GM.

                    HHMI has agreed not to offer or sell, or
                    solicit offers to purchase, any shares of Class
                    H Stock (or securities convertible into or
                    exchangeable for such shares) during the period
                    from the date of the Class H Stock Sale
                    Agreement until the Pricing Date, except if a
                    registration statement has not been filed by
                    March 27, 1995 this restriction will not apply
                    until the registration statement is filed. 
                    HHMI has also agreed to enter into an agreement
                    with the underwriters for the Offering
                    restricting the sale of such securities for a
                    period of 90 days after the Pricing Date.

                    The Class H Stock Sale Agreement gives HHMI the
                    right (if the Class H Stock Agreement Put Right
                    (as defined below) has expired unexercised on
                    March 1, 1995) to require GM to purchase from
                    HHMI a number of shares of Class H Common
                    Stock, as determined by HHMI, not to exceed 15
                    million minus the sum of the number of shares
                    of Class H Stock actually sold in the Offering
                    (other than any over-allotment shares) and the
                    number of shares of Class H Stock held by HHMI
                    that are subject to any underwriter's over-
                    allotment options (the "Put Right").  If HHMI
                    gives the underwriters for the Offering an
                    over-allotment option, HHMI would also have, if
                    the Offering is consummated, a put right with
                    respect to shares not purchased by the
                    underwriters pursuant to the over-allotment
                    option.

                    In general, HHMI may exercise the Put Right on
                    the earlier of (i) the first business day after
                    the Pricing Date, or (ii) under certain
                    conditions, June 30, 1995 (or, in certain
                    specified circumstances, at HHMI's option,
                    September 30, 1995) (the "Put Date").

                    The purchase price per share of the shares of
                    Class H Stock subject to the Put Right is
                    $30.00, except that if the average market price
                    of Class H Stock over the 10 consecutive
                    business days preceding the Put Date (the "Put
                    Share Market Value") is less than $10.00, then
                    such price per share of Class H Stock will be
                    the sum of such Put Share Market Value and
                    $20.00.  

                    The Class H Stock Sale Agreement provides for
                    the termination of all rights and obligations
                    of the parties under the Class H Stock
                    Agreement, except for the right of GM to
                    purchase any Series IV Call Shares and the
                    right of HHMI (the "Class H Stock Agreement Put
                    Right") to require GM to purchase any 1995 Put
                    Shares.  The call right expires if not
                    exercised on or before February 28, 1995 and
                    the put right expires if not exercised on March
                    1, 1995.

                    The Class H Stock Sale Agreement will terminate
                    on the Put Date, except as otherwise provided
                    therein.

                    Reference is made to the Class H Stock Sale
                    Agreement filed as Exhibit A hereto, which sets
                    forth all of the rights and obligations of the
                    parties thereto, including with respect to
                    indemnification and payment of expenses in
                    certain circumstances.  The foregoing
                    description is qualified in its entirety by the
                    terms of the Class H Stock Sale Agreement.

          Item 7.   MATERIAL TO BE FILED AS EXHIBITS

                    Class H Stock Sale Agreement, dated February
                    15, 1995  (Exhibit A)



                              S I G N A T U R E

                         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.

          Dated:  February 17, 1995

                                   HOWARD HUGHES MEDICAL INSTITUTE

                                   /s/  Craig A. Alexander  
                                   Craig A. Alexander, Esq.
                                   Deputy General Counsel           
                                     and Assistant Secretary




EXHIBIT A                                                CONFORMED COPY

                               CLASS H STOCK

                               SALE AGREEMENT

                               BY AND BETWEEN

                      HOWARD HUGHES MEDICAL INSTITUTE

                                    AND

                         GENERAL MOTORS CORPORATION



                        CLASS H STOCK SALE AGREEMENT

               THIS AGREEMENT is entered into on February 15, 1995, by
     and between Howard Hughes Medical Institute, a Delaware
     corporation (the "Institute"), and General Motors Corporation, a
     Delaware corporation ("General Motors").

               WHEREAS, the Institute is the owner of 17,503,800
     shares of the Class H Common Stock, par value $0.10 per share, of
     General Motors (the "Class H Common Stock"); 

               WHEREAS, the Institute and General Motors are parties
     to the Class H Stock Agreement dated as of February 27, 1989 (as
     amended by Amendment to Class H Stock Agreement dated as of
     October 15, 1992, the "1989 Class H Agreement"); and

               WHEREAS, the Institute and  General Motors desire to
     make certain arrangements with respect to a proposed offering and
     sale of that number of shares of Class H Common Stock which the
     Institute determines it wishes to sell.

               NOW, THEREFORE, in consideration of the foregoing and
     the mutual agreements hereinafter contained, the Institute and
     General Motors agree as follows:

                         1.        The Distribution.  

               (a)   The proposed offering and sale of shares of
     Class H Common Stock by the Institute to which this Agreement
     relates (the "Distribution") shall be a customary firm commitment
     underwriting, which shall be registered under the Securities Act
     of 1933, as amended (the "Act"), for that number of shares of
     Class H Common Stock which the Institute determines it wishes to
     sell.  The  Institute will select the investment banker or
     investment bankers that will manage the Distribution; provided
     that the investment banker or investment bankers selected by the
     Institute shall be reasonably acceptable to General Motors.

               (b)   The Institute may determine not to proceed with
     the Distribution at any time for any reason; provided that if the
     Institute so determines it shall immediately abandon and
     terminate all activities in connection with the Distribution and
     immediately notify General Motors of such determination.

               (c)   The parties acknowledge that the provisions of
     this agreement are intended to reflect the mutual interest of the
     Institute and General Motors in having any shares of Class H
     Common Stock that the Institute desires to sell offered and sold
     in an orderly manner which does not materially adversely affect
     the market price of the Class H Common Stock and, to this end,
     the parties agree to consult with each other with respect to the
     Institute's distribution plans and the views of General Motors
     with respect to the  types of distribution which, in General
     Motors' opinion, would materially adversely affect the market
     price of the Class H Common Stock.   

               2.    Distribution Procedures.  

               (a)   In connection with the Distribution, General
     Motors agrees:

               (i)   as soon as practicable to prepare (in
          conjunction with the Institute) and file with  the
          Securities and Exchange Commission (the "Commission") a
          Registration Statement on Form S-3 (the "Registration
          Statement");

              (ii)   to use its best efforts, subject to receipt of
          necessary information from the Institute, to cause the
          Registration Statement to become effective as soon as
          practicable after the filing thereof; provided that a
          reasonable time before filing a Registration Statement or
          prospectus or any amendments or supplements thereto, General
          Motors shall furnish copies of all such documents proposed
          to be filed to the Institute and to one counsel for the
          Institute;

             (iii)   to prepare and file with the Commission such
          amendments and supplements to the Registration Statement and
          the prospectus used in connection therewith as may be
          necessary to keep the Registration Statement effective for a
          period of sixty days (as extended by any period during which
          (A) offers and sales are suspended pending receipt of a
          supplemented or amended prospectus following the occurrence
          of an event of the kind described in Section 2(a)(vi), or
          (B) the Distribution is postponed or suspended pursuant to
          the provisions of Section 2(f) or otherwise suspended or
          delayed for any reason (other than the exercise by the
          Institute of its reasonable business judgment or market
          conditions)) or such shorter period which shall terminate
          when all shares of Class H Common Stock covered by the
          Registration Statement (other than any shares subject to any
          underwriter's over-allotment option to the extent that such
          option has expired unexercised) have been sold, but in no
          event shorter than any period required to comply with the
          provisions of the Act with respect to the disposition of
          shares of Class H Common Stock covered thereby in accordance
          with the method of disposition set forth in the Registration
          Statement;

              (iv)   to furnish to the Institute (and to each
          underwriter, if any) such number of copies of prospectuses
          and preliminary prospectuses included in the Registration
          Statement and such other documents as the Institute may
          reasonably request, in order to facilitate the Distribution;
          provided, however, that the obligation of General Motors to
          deliver such copies to the Institute shall be subject to the
          receipt by General Motors of reasonable assurances from the
          Institute that the Institute shall comply with the
          applicable provisions of the Act and of such other
          securities or blue sky laws as may be applicable in
          connection with any use thereof;  

               (v)   to file documents (if any) required of General
          Motors for normal blue sky clearance in states reasonably
          specified in writing by the Institute; provided that General
          Motors shall not be required to (a) qualify generally to do
          business in any jurisdiction where it would not otherwise be
          required to qualify but for this subparagraph, (b) subject
          itself to taxation in any such jurisdiction where it would
          not otherwise be subject to taxation or (c) consent to
          general service of process in any such jurisdiction where it
          would otherwise not be subject thereto;

              (vi)   to notify the Institute, at any time when a
          prospectus relating to the Registration Statement is
          required to be delivered under the Act, of the occurrence of
          an event relating to General Motors which requires the
          preparation of a supplement or amendment to such prospectus
          so that, as thereafter delivered to the purchasers of shares
          of Class H Common Stock, such prospectus shall not contain
          an untrue statement of a material fact or an omission to
          state a material fact required to be stated therein or
          necessary to make the statements therein, in light of the
          circumstances under which they were made, not misleading and
          promptly make available to the Institute any such supplement
          or amendment;

             (vii)   to make available members of the management of
          GM Hughes Electronics Corporation and, if appropriate, of
          General Motors, in each case selected by General Motors, for
          reasonable assistance in the selling effort relating to the
          shares of Class H Common Stock covered by the Registration
          Statement;

            (viii)   to enter into customary agreements (including an
          underwriting agreement in customary form) and take such
          other actions as are reasonably required in order to
          expedite or facilitate the disposition of the shares of
          Class H Common Stock in the Distribution;  and

              (ix)   to use its best efforts to obtain a comfort
          letter or letters from General Motors' independent certified
          public accountants and to provide opinions from General
          Motors (or General Motors' outside counsel), in each case,
          in customary form and covering such matters of the type
          customarily covered as the managing underwriter for the
          Distribution reasonably requests.

               (b)   In the event General Motors has notified the
     Institute that (i) the Registration Statement contains an untrue
     statement of a material fact or omits any fact necessary to make
     the statements therein not misleading, then the Institute shall
     not deliver the related prospectus to any purchaser until a
     supplement or amendment thereto has been prepared as set forth in
     Section 2(a)(vi) or until General Motors advises the Institute in
     writing that the use thereof may be resumed.  General Motors may
     require the Institute to furnish to General Motors such
     information regarding the distribution of shares of Class H
     Common Stock and such other information as may be required in
     connection with the Distribution.  The Institute shall promptly
     take any and all actions reasonably requested by General Motors
     to enable General Motors to comply with its obligations under
     this Section 2.

               (c)   The Institute agrees that it shall proceed in
     good faith, subject to the exercise of reasonable business
     judgment, market conditions and the provisions of this Agreement
     (including Section 1(b) hereof) to commence and complete the
     Distribution as promptly as practicable after the date hereof. 
     The Institute shall keep General Motors reasonably informed as to
     the status of the Distribution and shall notify General Motors
     promptly upon completion of the Distribution.  The Institute
     acknowledges and agrees that General Motors will participate and
     assist, and the Institute will afford General Motors
     opportunities to participate and assist, in the offering process
     and the selling effort related to the Distribution.  Without
     limiting the generality of the foregoing,  General Motors, the
     Institute and the underwriters for the Distribution shall
     cooperate and work together in planning the selling efforts,
     including the presentations to be made to potential purchasers
     and the determination of which potential investors to contact
     with respect to the Distribution.  

               (d)   The Institute shall comply with the applicable
     provisions of the Act and of such other securities or blue sky
     laws as may be applicable in connection with the Distribution. 
     Without limiting the generality of the foregoing, the Institute
     agrees that it shall not use any offering document, offering
     circular or other offering materials with respect to the offer or
     sale of shares of Class H Common Stock in the Distribution other
     than the prospectuses provided by General Motors hereunder and
     any documents incorporated by reference therein.
      
               (e)   The Institute shall notify General Motors
     promptly at any time when a prospectus related to the
     Registration Statement is required to be delivered under the Act
     of the occurrence of any event relating to the Institute which
     requires the preparation of an appropriate supplement or
     amendment to such prospectus so that, as thereafter delivered to
     the purchasers of shares of Class H Common Stock, such prospectus
     shall not contain an untrue statement of a material fact or an
     omission to state a material fact required to be stated therein
     or necessary to make the statements therein, in light of the
     circumstances under which they were made, not misleading relating
     to the Institute, and General Motors shall promptly make
     available to the Institute any such supplement or amended
     prospectus.  The Institute also agrees that, upon the occurrence
     of any such event, the Institute shall forthwith discontinue
     disposition of shares of Class H Common Stock until the
     Institute's receipt of the copies of the supplement or amended
     prospectus contemplated by this paragraph.

               (f)   General Motors shall be entitled to postpone or
     suspend the Distribution (including to postpone the filing or
     effectiveness of the Registration Statement or the use of any
     related prospectus) if General Motors determines, in its
     reasonable judgment, that the Distribution or such filing,
     effectiveness or use would (i) materially interfere with any
     proposal or plan by General Motors or any of its affiliates to
     engage in any material acquisition, merger, consolidation, tender
     offer, securities offering or other material transaction (other
     than an equity offering for cash proceeds) or (ii) require
     General Motors to make public disclosure of information the
     disclosure of which would have a material adverse effect on Delco
     Electronics Corporation, Hughes Aircraft Company, GM Hughes
     Electronics Corporation or General Motors.  If General Motors
     makes such a determination, it shall promptly give the Institute
     a certificate signed by an officer of General Motors setting
     forth such determination.  General Motors agrees that it shall
     terminate any such postponement or suspension as promptly as
     reasonably practicable and shall promptly notify the Institute of
     such termination.  In making any such determination to initiate
     or terminate a postponement or suspension, General Motors shall
     not be required to consult with or obtain the consent of the
     Institute, and any such determination shall be General Motors 
     responsibility alone, and the Institute shall not be responsible
     or have any liability therefor.

               3.    Confidentiality.

               (a)   Subject to the compliance with legal
     requirements in the reasonable business judgment of each party,
     each of the parties shall treat all non-public information
     relating to the Distribution received from the other party
     (including the existence of and any reasons for any postponement
     or suspension thereof under Section 2(f)) with the strictest
     confidence and shall not disclose or disseminate such
     information; provided that, if the Institute has determined not
     to proceed with the Distribution or if offers and sales by the
     Institute are not then prohibited by Section 6(b), the foregoing
     shall not prevent the Institute from disclosing such information
     as it reasonably determines it is required to disclose in
     connection with any offer, sale or other disposition by the
     Institute of General Motors' securities; and provided, further,
     that the Institute shall not disclose any non-public information
     (including any information disclosed to the Institute pursuant to
     Section 3(b)) prior to three Business Days after the Institute
     gives notice to General Motors that it intends to disclose such
     information.  Except as required by law in the Registration
     Statement and any related prospectus (and subject to the
     provisions of Section 2(f)), nothing herein shall be construed to
     require General Motors or any of its subsidiaries or affiliates
     at any time to make any public disclosure of information or to
     make any disclosure of non-public information to the Institute.  

               (b)   If the Institute is advised by its legal counsel
     to obtain information from General Motors regarding matters which
     (i) federal securities laws require to be included in the
     Registration Statement or (ii) relates to the preservation by the
     Institute of legal defenses associated with the Institute's
     federal securities laws responsibilities with respect to the
     Distribution, it shall do so through outside legal counsel and
     other outside advisors who have agreed to be bound by the
     provisions of Section 3 selected by the Institute and in the
     manner advised by legal counsel.  Such legal counsel and advisors
     may provide any such information obtained by them to the
     Institute if they determine that doing so is reasonably
     necessary, in the view of legal counsel, in order for the
     Institute to satisfy any disclosure requirements applicable to it
     or preserve any defenses of the Institute under the federal
     securities laws in connection with the Distribution.  Legal
     counsel to the Institute shall advise General Motors in advance
     if and to the extent any such information is to be provided to
     the Institute.  The Institute shall limit the disclosure of any
     information which it has obtained pursuant to this Section 3(b)
     in the manner contemplated by Section 3(a). 

               (c)   Notwithstanding the provisions of this Section
     3, if General Motors shall disclose any non-public information to
     the Institute in connection with its exercise of the Put Right
     (as defined below) or the Over-Allotment Put (as defined below),
     the Institute shall treat such information with the strictest
     confidence and shall not disseminate such information until 21
     days following the date on which it received such information.

               4.    Payment of Distribution Expenses.  All
     Distribution Expenses (as defined below) incident to General
     Motors' performance of its obligations with respect to the
     Distribution under Section 2 hereof shall be paid by the
     Institute promptly upon demand by General Motors for payment
     regardless of whether the Distribution has been commenced or
     completed; provided that the Institute shall not be obligated to
     pay such Distribution Expenses in the event that the Institute
     determines not to proceed with the Distribution as a result of
     the exercise by General Motors of its rights to postpone the
     Distribution under Section 2(f) hereof.  The term "Distribution
     Expenses" means expenses reasonably incurred in order to effect
     the Distribution which would not have been incurred but for the
     Distribution, including, without limitation, all registration and
     filing fees, fees and expenses of compliance with federal and
     state securities or blue sky laws (including reasonable fees and
     disbursements of counsel), reasonable printing expenses,
     messenger and delivery expenses, reasonable fees and
     disbursements of counsel for General Motors and its independent
     certified public accountants, reasonable fees and expenses of any
     special experts or others retained by General Motors (as being
     necessary or advisable) in connection with the Distribution,
     reasonable travel expenses and other out-of-pocket costs incurred
     by General Motors in carrying out its agreements hereunder, any
     underwriting discounts, commissions or fees attributable to the
     sale of securities, reasonable fees and disbursements of counsel
     to the Institute and other expenses incurred in connection with
     the Distribution.

               5.    Indemnification.  

               (a)   General Motors agrees to indemnify and hold
     harmless the Institute, its trustees, directors, officers,
     employees and agents and each person who would be an underwriter,
     its trustees, officers, directors, employees and agents, and each
     person, if any, who controls within the meaning of either Section
     15 of the Act or Section 20 of the Securities and Exchange Act of
     1934, as amended (the "Exchange Act"), the Institute or any such
     underwriter, from and against any and all losses, claims,
     damages, liabilities and expenses (including reasonable costs of
     investigation) arising out of or based upon any untrue statement
     or alleged untrue statement of a material fact contained in the
     Registration Statement or any related prospectus, or in any
     amendment or supplement thereto, or arising out of or based upon
     any omission or alleged omission to state therein a material fact
     required to be stated therein or necessary to make the statements
     therein not misleading, except insofar as such losses, claims,
     damages, liabilities or expenses arise out of, or are based upon,
     any such untrue statement or omission or allegation thereof based
     upon information furnished in writing to General Motors by or on
     behalf of the Institute expressly for use therein; provided that
     with respect to any untrue statement or omission or alleged
     untrue statement or omission made in the Registration Statement
     or any such prospectus, or in any amendment or supplement
     thereto, the indemnity agreement provided for in this paragraph
     shall not apply to the extent that any such loss, claim, damage,
     liability or expense results from the fact that a copy of the
     Registration Statement or such related prospectus, or in any
     amendment or supplement thereto, was not sent or given to the
     person asserting any such losses, claims, damages, liabilities or
     expenses at or prior to the written confirmation of the sale of
     the shares of Class H Common Stock concerned to such person.

               (b)   The Institute agrees, and each underwriter
     selected shall agree, to indemnify and hold harmless General
     Motors and its subsidiaries and their respective directors,
     officers, employees and agents and each person, if any, who
     controls General Motors or any of its subsidiaries within the
     meaning of either Section 15 of the Act or Section 20 of the
     Exchange Act, to the same extent as the foregoing indemnity from
     General Motors, but only with respect to information furnished in
     writing by or on behalf of the Institute or such underwriter, as
     the case may be, expressly for use in the Registration Statement
     or related prospectus or any amendment or supplement thereto. 
     Each underwriter selected shall agree to indemnify the Institute,
     its trustees, directors, officers, employees, agents and each
     person, if any, who controls the Institute within the meaning of
     Section 15 of the Act or Section 20 of the Exchange Act, to the
     same extent that each underwriter indemnifies General Motors. 
     The Institute agrees to indemnify and hold harmless the
     underwriters of the shares of Class H Common Stock, their
     officers and directors and each person who controls such
     underwriters on substantially the same basis as that of the
     indemnification of General Motors provided in this Section 5.

               (c)   If any action or proceeding (including any
     governmental investigation) shall be brought or asserted against
     any person indemnified hereunder in respect of which indemnity
     may be sought from an indemnifying party, the indemnifying party
     shall assume the defense thereof, including the employment of
     counsel reasonably satisfactory to the indemnified person, and
     shall assume the payment of all expenses.  The indemnified person
     shall have the right to employ separate counsel in any such
     action and to participate in the defense thereof, but the fees
     and expenses of such separate counsel shall be at the expense of
     the indemnified person unless (i) the indemnifying party has
     agreed in writing to pay such fees and expenses, (ii) the
     indemnifying party shall have failed to assume the defense of
     such action or proceeding and employ counsel reasonably
     satisfactory to the indemnified person in such action or
     proceeding or (iii) the named parties to any such action or
     proceeding (including any impleaded parties) include both an
     indemnified person and the indemnifying party, and representation
     of both parties by the same counsel would be inappropriate due to
     actual or potential differing interests between them.  It is
     understood that the indemnifying party shall not, in connection
     with any proceeding or related actions or proceedings in the same
     jurisdiction be liable for the fees and expenses of more than one
     separate firm of attorneys (together with appropriate local
     counsel) at any time for the indemnified persons, which firm
     shall be designated in writing by whichever of General Motors or
     the Institute is an indemnified person.  No indemnifying party
     shall be liable for any settlement of any such action or
     proceeding effected without its written consent, but if settled
     with its written consent, or if there be a final judgment for the
     plaintiff in any such action or proceeding, the indemnifying
     party agrees to indemnify and hold harmless the indemnified
     person from and against any loss or liability (to the extent
     stated above) by reason of such settlement or judgment.

               (d)   If the indemnification provided for in this
     Section 5 is unavailable in respect of any losses, claims,
     damages, liabilities or judgments referred to therein, then each
     such indemnifying party, in lieu of indemnifying such indemnified
     party, shall contribute to the amount paid or payable by such
     indemnified party as a result of such losses, claims, damages,
     liabilities and judgments (i) as between General Motors and the
     Institute on the one hand and the underwriters on the other, in
     such proportion as is appropriate to reflect the relative
     benefits received by General Motors and the Institute on the one
     hand and the underwriters on the other from the offering of the
     shares of Class H Common Stock, or if such allocation is not
     permitted by applicable law, in such proportion as is appropriate
     to reflect not only such relative benefits but also the relative
     fault of General Motors and the Institute on the one hand and of
     the underwriters on the other in connection with the statements
     or omissions which resulted in such losses, claims, damages,
     liabilities or judgments, as well as any other relevant equitable
     considerations and (ii) as between General Motors, on the one
     hand, and the Institute on the other, in such proportion as is
     appropriate to reflect the relative fault of General Motors and
     of the Institute in connection with such statements or omissions,
     as well as any other relevant equitable considerations.  The
     relative benefits received by General Motors and the Institute on
     the one hand and the underwriters on the other shall be deemed to
     be in the same proportion as the total proceeds from the
     Distribution (net of underwriting discounts and commissions but
     before deducting expenses) received by General Motors and the
     Institute bear to the total underwriting discounts and
     commissions received by the underwriters, in each case as set
     forth in the table on the cover page of the prospectus.  The
     relative fault of General Motors and the Institute on the one
     hand and of the underwriters on the other shall be determined by
     reference to, among other things, whether the untrue or alleged
     untrue statement of a material fact or the omission or alleged
     omission to state a material fact relates to information supplied
     by General Motors and the Institute or by the underwriters and
     the parties' relative interest, knowledge, access to information
     and opportunity to correct or prevent such statement or omission. 
     The relative fault of General Motors on the one hand and of the
     Institute on the other shall be determined by reference to, among
     other things, whether the untrue or alleged untrue statement of a
     material fact or the omission or alleged omission to state a
     material fact relates to information supplied by such party, and
     the parties, relative intent, knowledge, access to information
     and opportunity to correct or prevent such statement or omission.

               (e)   General Motors and the Institute agree that it
     would not be just and equitable if contribution pursuant to this
     section were determined by pro rata allocation (even if the
     underwriters were treated as one entity for such purpose) or by
     any other method of allocation which does not take account of the
     equitable considerations referred to in the immediately preceding
     paragraph.  The amount paid or payable by an indemnified party as
     a result of the losses, claims, damages, liabilities, or
     judgments referred to in the immediately preceding paragraph
     shall be deemed to include, subject to the limitations set forth
     above, any legal or other expenses reasonably incurred by such
     indemnified party in connection with investigating or defending
     any such action or claim.  Notwithstanding the provisions of this
     Section 5, the Institute shall not be required to contribute any
     amount in excess of the amount by which the total price at which
     the shares of Class H Common Stock sold by it exceeds the amount
     of any damages which the Institute has otherwise been required to
     pay by reason of such untrue or alleged untrue statement or
     omission or alleged omission. No person guilty of fraudulent
     misrepresentation (within the meaning of Section 11(f) of the
     Act) shall be entitled to contribution from any person who was
     not guilty of such fraudulent misrepresentation.

               (f)   For purposes of this Section 5, any reference to
     an underwriter shall include any person that would be deemed to
     be an underwriter within the meaning of the Act if the Institute
     were deemed to be an issuer within the meaning of the Act.

               6.    Hold Back Agreements.

               (a)   General Motors agrees (and will directly agree
     with the underwriters for the Distribution) that, unless the
     underwriter or underwriters administering the Distribution
     otherwise agree, and except as specifically contemplated by this
     Agreement in connection with the Distribution, it shall not offer
     or sell, or solicit offers to purchase, or file any registration
     statement under the Act (other than any registration statement
     filed pursuant to Rule 415 under the Act) with respect to, any
     shares of Class H Common Stock (or securities convertible into or
     exchangeable for such shares) during the period from the date
     hereof until 90 days after the Pricing Date; provided that
     General Motors shall not be precluded from (i) the issuance of
     shares of Class H Common Stock upon the conversion, exercise or
     exchange, by the holder thereof, of options, warrants or other
     securities convertible into or exercisable or exchangeable for
     the Class H Common Stock pursuant to the terms of such options,
     warrants or other securities, (ii) transfers pursuant to the
     terms of any other agreement to issue shares of Class H Common
     Stock (or any securities convertible into or exchangeable or
     exercisable for the Class H Common Stock) in effect on the date
     of the commencement of the Distribution, including any such
     agreement in connection with any previously disclosed
     acquisition, merger, consolidation or other business combination,
     (iii) transfers in connection with dividend reinvestment plans or
     employee benefit plans of General Motors (or a subsidiary of
     General Motors) and (iv) making any offer or sale of shares of
     Class H Common Stock (or securities convertible into or
     exchangeable for such shares) as consideration in any merger or
     consolidation or the acquisition by General Motors or any
     subsidiary of General Motors of the capital stock or a
     substantial portion of the assets of any other entity.  

               (b)   The Institute agrees that, except as
     specifically contemplated by this Agreement in connection with
     the Distribution,  it shall not offer or sell, or solicit offers
     to purchase, any shares of Class H Common Stock (or securities
     convertible into or exchangeable for such shares (whether Core
     Shares (as defined in the 1989 Class H Agreement) or otherwise)
     during the period from the date hereof until the Pricing Date (as
     defined below); provided that, if the Registration Statement has
     not been filed by the date which is 40 days after the date
     hereof, this sentence shall not apply during the period from such
     40th day until the date on which the Registration Statement is
     filed.  The Institute will directly agree with the underwriters
     for the Distribution that, unless the underwriters administering
     the Distribution otherwise agree, and except as specifically
     contemplated by this Agreement in connection with the
     Distribution, it shall not offer or sell, or solicit offers to
     purchase, any shares of Class H Common Stock (or securities
     convertible into or exchangeable for such shares) (whether Core
     Shares or otherwise) during the period from the Pricing Date
     until 90 days thereafter. Nothing in this Section 6(b) shall
     prohibit the Institute from selling shares of Class H Common
     Stock to General Motors upon the exercise of any put rights by
     the Institute or any call rights by General Motors. 

               (c)   The provisions of this Section 6 shall terminate
     and have no further force or effect upon the giving of a notice
     by the Institute to General Motors that the Institute has
     determined not to proceed with the Distribution as described in
     Section 1(b).  
               7.    Termination of 1989 Class H Agreement. 
     Effective as of the date hereof and without further action by
     either party, except for (i) General Motors' right to purchase
     the Institute's Series IV Call Shares (as defined in the 1989
     Class H Agreement) (or any portion thereof) pursuant to the call
     right set forth in Section 6 of the 1989 Class H Agreement and
     all rights and obligations of the parties set forth in the 1989
     Class H Agreement related to effecting such call right and  (ii)
     the Institute's right to require General Motors to purchase the
     1995 Put Shares (as defined in the 1989 Class H Agreement) (or
     any portion thereof) pursuant to the put right set forth in
     Section  5 of the 1989 Class H Agreement and all rights and
     obligations of the parties set forth in the 1989 Class H
     Agreement related to effecting such put right,  General Motors
     and the Institute hereby terminate the 1989 Class H Agreement and
     mutually waive all rights and release all obligations thereunder
     and such agreement shall be of no further force or effect. 
     General Motors agrees to cause the restrictive legend required by
     the 1989 Class H Agreement on certificates of Class H Common
     Stock held by the Institute to be removed promptly from each such
     certificate following execution of this Agreement and to issue a
     certificate or certificates for shares of Class H Common Stock
     without such legend in the names and denominations specified in
     writing by the Institute.

               8.    Mandatory Purchase of Shares.

               (a)   So long as the Institute shall not have
     exercised its right to require General Motors to purchase any of
     the 1995 Put Shares pursuant to Section 5 of the 1989 Class H
     Agreement, on the Put Date (as defined below), the Institute
     shall have the right to require General Motors, upon the terms
     and subject to the conditions set forth in this Section 8, to
     purchase from the Institute (the "Put Right") a number of shares
     of Class H Common Stock (the "Put Shares") (as determined by the
     Institute) not to exceed (i) 15,000,000 minus (ii) if the
     Institute shall have entered into the Underwriting Agreement (as
     defined below), the sum of (x) the number of shares (other than
     any shares being offered by the Institute that are subject to any
     underwriter's over-allotment options, which are separately
     addressed in Section 8(h) below) actually sold pursuant to such
     Agreement and (y) the number of shares being offered by the
     Institute that  are subject to any underwriters' over-allotment
     options.  

               For all purposes of this Agreement: 

               (v) the "Underwriting Agreement" shall mean any
          underwriting agreement entered into in connection with the
          Distribution and the "Pricing Agreement" shall mean any
          related pricing agreement with underwriters; 

               (w) a "Distribution Closing" shall mean a closing
          (including any delayed closing with respect to an
          underwriters' over-allotment option) under the Underwriting
          Agreement;

               (x)   the "Pricing Date" shall mean the date on which
          the Institute enters into the Underwriting Agreement or, if
          such agreement does not specify the price at which shares
          will be sold, the Pricing Agreement; 

               (y)   a "Business Day" shall mean any day on which The
          New York Stock Exchange, Inc. (the "NYSE") is open for
          trading, except in each year the day following Thanksgiving
          Day and each day during the period from and including
          December 24 through January 1; and

               (z)   the "Put Date" shall mean the earlier of  (A)
          the first Business Day after the Pricing Date, provided
          that, if the related Underwriting Agreement is terminated
          without any Distribution Closing having occurred, the Put
          Date shall not be deemed to have occurred pursuant to this
          clause (A) and any Put Notice (as defined below) delivered
          prior to such termination shall be null and void, except
          that, if the Pricing Date is on or before June 30, 1995 and
          the related Underwriting Agreement is terminated on June 30,
          1995 or thereafter without any Distribution Closing having
          occurred, the Put Date shall be the first Business Day after
          the date such Underwriting Agreement so terminates, and  (B)
          June 30, 1995 (or such later date (the "Clause (A) Extended
          Put Date") as is determined to be the Put Date pursuant to
          the exception set forth in the proviso to clause (A) above),
          provided that, if for any reason (other than the exercise by
          the Institute of its reasonable business judgment or market
          conditions) there has not been a Distribution Closing by
          June 30, 1995, so long as, prior to June 30, 1995, the
          Institute has not abandoned the Distribution as described in
          Section 1(b) hereof, the Put Date as determined pursuant to
          this clause (B) shall be, at the option of the Institute,
          June 30, 1995 (or, if later, the Clause (A) Extended Put
          Date) or September 30, 1995.

               (b)   The Institute may exercise the Put Right by
     delivering to General Motors on or before the close of business
     (5:00 p.m., New York City time) on the Put Date a written notice
     (the "Put Notice") setting forth the Institute's intention to
     exercise the Put Right and the number of Put Shares to be
     purchased at the Put Closing; provided, however, that the Put
     Notice may simply specify that the Institute is exercising the
     Put Right with respect to the maximum number of shares as to
     which it is permitted to exercise the Put Right in the case of a
     Put Notice delivered on the first Business Day after the Pricing
     Date.  The Put Right shall expire at the close of business on the
     Put Date (as specified in Section 8(a)(z)) if it has not been
     exercised prior to that time.  The closing (the "Put Closing") of
     the sale and purchase of Put Shares pursuant to this Section 8
     shall take place at the New York offices of General Motors on a
     date and at a time selected by General Motors which shall be not
     later than ten Business Days after the Put Date and which, in the
     case of the Put Date occurring on the first Business Day after
     the Pricing Date, shall be on or after the first Distribution
     Closing.  General Motors shall promptly notify the Institute of
     the date of the Put Closing.  If the Put Closing is prohibited by
     the terms of any injunction or court order, the Institute and
     General Motors will use their best efforts to have such
     prohibition lifted and to consummate the sale and purchase of the
     related Put Shares as soon as practicable thereafter.

               (c)   The purchase price for each Put Share purchased
     by General Motors pursuant to the exercise of the Put Right (the
     "Put Purchase Price") shall be $30.00; provided, that if the Put
     Share Market Value (as defined below) is less than $10.00, then
     the Put Purchase Price shall be the sum of (i) the Put Share
     Market Value and (ii) $20.00.

               (d)   At the Put Closing, the aggregate Put Purchase
     Price for all Put Shares being purchased on such date, plus
     interest on such aggregate amount calculated on a daily basis at
     a rate equal to the Applicable Treasury Rate (as defined below)
     for such day, which interest shall accrue from the Business Day
     following the Put Date to and including the date of the Put
     Closing (including any period during which the Put Closing is
     prohibited by the terms of an injunction or court order), shall
     be payable to the Institute by wire transfer of immediately
     available funds to such account as the Institute shall have
     previously designated in writing against the receipt of
     certificates representing such Put Shares.  After the Put
     Closing, the Institute shall have no rights in respect of the Put
     Shares sold at the Put Closing, except the right to receive (at
     the time paid to other stockholders of record) payments of
     dividends on such Put Shares payable after the Put Closing to
     holders of record of shares of Class H Common Stock on a date
     prior to the date of the Put Closing.  In the event that for any
     reason the Put Closing occurs after the closing date selected by
     General Motors pursuant to Section 8(b), any dividend received by
     the Institute on each Put Share being purchased which is payable
     to holders of record of shares of Class H Common Stock on a date
     subsequent to such date selected by General Motors shall be for
     the account of General Motors and the Institute shall pay over
     the amount of such dividend to General Motors at the Put Closing
     or, if the dividend payment date is after than the Put Closing,
     promptly upon the Institute's receipt of such dividend.

               (e)   At the Put Closing, the Institute shall deliver
     to General Motors certificates representing the Put Shares being
     purchased, duly endorsed, or accompanied by stock power(s) duly
     executed in blank.  The Institute shall also deliver to General
     Motors a representation and warranty, duly executed on behalf of
     the Institute, that at the Put Closing the Institute has valid
     and marketable title to the Put Shares being purchased, free and
     clear of all claims, liens, charges, encumbrances and security
     interests and that upon delivery of and payment for such Put
     Shares at the Put Closing General Motors will acquire good and
     marketable title to such Put Shares, free and clear of any
     claims, liens, charges, encumbrances or security interests.

               (f)   The "Put Share Market Value" for purposes of
     this Section 8 shall be the average of the daily high and low
     sales prices for the Class H Common Stock for the 10 consecutive
     Business Days ending on and including the Business Day
     immediately prior to the Put Date.  The high and low sales prices
     for each day shall be the high and low sales prices as reported
     in The Wall Street Journal or, if not so reported, as reported in
     another newspaper of national circulation selected by General
     Motors or, in case no such sale takes place on such day, the
     average of the closing bid and asked prices regular way on the
     NYSE, or if the Class H Common Stock is not then listed or
     admitted to trading on the NYSE, on the largest principal
     national securities exchange (as determined by total volume of
     trades during the preceding six months) on which such stock is
     then listed or admitted to trading, or if not listed or admitted
     to trading on any principal national securities exchange, then
     the average of the last reported sales prices for such shares in
     the over-the-counter market, as reported on the National
     Association of Securities Dealers Automated Quotation System, or,
     if such sales prices shall not be reported thereon, the average
     of the closing bid and asked prices as reported thereon, or if
     such bid and asked prices shall not be reported thereon, as the
     same shall be reported by the National Quotation Bureau
     Incorporated, or, in all other cases, an appraised fair market
     value of such stock furnished by any NYSE member selected from
     time to time by General Motors and satisfactory to the Institute
     for such purpose.

               (g)   The "Applicable Treasury Rate" for purposes of
     this Agreement shall mean, with respect to any day, the rate
     converted to a bond equivalent basis listed for such day (or if
     no rate is listed for such day, the rate listed for the last
     previous day for which a rate is listed) on the appropriate
     Federal Reserve Statistical Release H.15 "Selected Interest
     Rates" as the Secondary Market rate for 3-Month Treasury Bills. 
     If such release ceases to be published or otherwise is not
     available for any period, the Applicable Treasury Rate shall be
     determined in a manner agreed upon by General Motors and the
     Institute as being an appropriate means of determining the rate
     that would have been listed on such release as the Secondary
     Market rate for 3-Month Treasury Bills.

               (h)  So long as the Institute shall not have exercised
     its right to require General Motors to purchase any of the 1995
     Put Shares pursuant to Section 5 of the 1989 Class H Agreement,
     if the Underwriting Agreement includes an underwriters' over-
     allotment option, on the Over-Allotment Put Date (as defined
     below), the Institute shall have an additional right (the "Over-
     Allotment Put") to require General Motors to purchase from the
     Institute, upon the terms and subject to the conditions of this
     Agreement,  a number of shares of Class H Common Stock (as
     determined by the Institute) not to exceed (i) the number of
     shares covered by such over-allotment option minus (ii) the
     number of shares sold by the Institute to the underwriters
     pursuant to the exercise of such option (including those sold on
     or prior to the Put Closing), provided that in no event shall the
     sum of the number of shares covered by the Put Right and the
     number of shares covered by the Over-Allotment Put exceed
     15,000,000.  The terms and conditions of the Over-Allotment Put
     shall in all respects be as nearly identical as practicable to
     the terms and conditions set forth in this Section 8 with respect
     to the Put Right, except that the Over-Allotment Put shall be
     exercisable by delivery of notice to General Motors only on or
     before the close of business (5:00 p.m. New York City time) on
     the Over-Allotment Put Date.  For all purposes of this Agreement,
     the "Over-Allotment Put Date" shall mean the earlier of (x) the
     first Business Day after the date on which the underwriters'
     over-allotment option expires, provided that such over-allotment
     expiration date shall in no event be more than 30 days after the
     Pricing Date, and (y) the date on which all shares subject to the
     option have been sold pursuant to the exercise thereof.

               9.  Cash Settlement.     If the Net Proceeds (as
     defined below) to the Institute from the Distribution exceed the
     amount that is the product of (x) the number of shares of Class H
     Common Stock sold by the Institute in the Distribution (including
     any shares sold pursuant to the exercise of an underwriters'
     over-allotment option) and (y) $37.50, then the Institute shall
     pay such excess (plus interest on such excess calculated on a
     daily basis at a rate equal to the Applicable Treasury Rate for
     the day of payment, which interest shall accrue from the Business
     Day following the last Distribution Closing to and including the
     date on which such excess is paid to General Motors) to General
     Motors in immediately available funds.  The Institute shall pay
     the amount of such excess (to the extent theretofore not paid) no
     later than ten days following the last Distribution Closing. 
     "Net Proceeds" shall mean the proceeds received by the Institute
     in the Distribution less any Distribution Expenses (including
     underwriting discounts and commissions) (as the amount of
     Distribution Expenses other than underwriting discounts and
     commissions shall be determined by mutual agreement between
     General Motors and the Institute).

               10.   Miscellaneous.

               (a)   Business Days.  If this Agreement requires that
     an action be taken on any day which is not a Business Day, such
     action shall be taken on the next succeeding Business Day.  Any
     action which may or is required to be taken on any Business Day
     shall be valid only if it is taken not later than 5:00 p.m. New
     York City time on such Business Day.  When a provision of this
     Agreement provides that a notice may or shall be given or other
     action taken within a specified number of Business Days following
     a certain event, the calculation of such number of Business Days
     shall begin with the Business Day next following the day on which
     such event occurs.  For example, if notice is required to be
     given within five Business Days following the receipt of another
     notice, such five Business Day period shall commence with the
     first Business day following the day such other notice was
     received.

               (b)   Amendments and Waivers.  Except as otherwise
     provided herein, the provisions of this Agreement may not be
     amended, modified or supplemented except by a writing signed by
     General Motors and the Institute.

               (c)   Notices.  All notices and other communications
     provided for or permitted hereunder shall be in writing and shall
     be made by hand delivery, by registered or certified first-class
     mail, return receipt requested, or by facsimile transmission:

               (i)   if to the Institute:

                     Howard Hughes Medical Institute
                     4000 Jones Bridge Road
                     Chevy Chase, Maryland 20815-6789
                     Attention:  Vice President and General Counsel
                     Telephone:  301-215-8843
                     Facsimile:  301-215-8848

                     with a copy to:

                     Vice President and Chief Investment Officer
                     Howard Hughes Medical Institute
                     4000 Jones Bridge Road
                     Chevy Chase, Maryland  20815-6789
                     Telephone:  301-215-8686
                     Facsimile:  301-215-8691

              (ii)   if to General Motors:

                     General Motors Corporation
                     767 Fifth Avenue
                     New York, New York  10153
                     Attention:  Treasurer
                     Telephone:  212-418-3500
                     Facsimile:  212-418-3695

                     with a copy to:

                     General Motors Corporation
                     3031 West Grand Boulevard
                     Detroit, Michigan  48202
                     Attention:  Warren G. Andersen
                     Telephone:  313-974-1528
                     Facsimile:  313-974-0685

               All notices and communications shall be deemed to have
     been duly given and received: when delivered by hand, if hand
     delivered; the third Business Day after being deposited in the
     mail, registered or certified, return receipt requested, first
     class postage prepaid, or earlier Business Day actually received,
     if mailed; upon oral confirmation of receipt, if by facsimile
     transmission.  Each party agrees promptly to confirm receipt of
     all notices.  The validity or effectiveness of any notice or
     other communication provided for or permitted under this
     Agreement shall not be affected by the failure to deliver the
     copies referred to above.

               (d)   Third Party Rights and Obligations.  Nothing in
     this Agreement shall be construed to give any person or entity
     other than the Institute and General Motors and other than 
     subsidiaries of General Motors and the respective directors,
     trustees, officers, employees, agents and controlling persons of
     General Motors and its subsidiaries and the Institute indemnified
     hereunder, any legal or equitable right, remedy or claim under
     this Agreement, and this Agreement shall be for the sole and
     exclusive benefit of such persons.

               (e)   Descriptive Headings.  The headings of the
     sections of this Agreement are inserted for convenience only and
     shall not constitute a part hereof.

               (f)   Cooperation.  Each party hereto shall take such
     further action, and execute such additional documents, as may be
     reasonably requested by the other party hereto in order to
     facilitate the Distribution as described herein.

               (g)   Binding Effect; Assignment.  This Agreement
     shall be binding upon and shall inure to the benefit of and be
     enforceable by each of the parties and their successors and
     permitted assigns.  None of the rights or obligations under this
     Agreement shall be assigned by the Institute without the consent
     of General Motors or by General Motors without the consent of the
     Institute.

               (h)   Counterparts.  This Agreement may be executed in
     any number of counterparts, and shall be deemed to have been duly
     executed and delivered by all parties when each party has
     executed a counterpart hereof and delivered an original or
     facsimile copy thereof to the other party.  Each such counterpart
     hereof shall be deemed to be an original, and all of which
     together shall constitute one and the same instrument.

               (i)   Governing Law.  All questions concerning the
     construction, validity and interpretation of this Agreement shall
     be governed by and construed in accordance with the internal law,
     and not the law of conflicts, of the State of Delaware.

               (j)   Remedies.  The Institute and General Motors
     agree that in addition to being entitled to exercise all rights
     granted by law, including recovery of damages, each party shall
     be entitled to specific performance of its rights under this
     Agreement.  Each party agrees that monetary damages would not be
     adequate compensation for any loss incurred by reason of a breach
     by it of the provisions of this Agreement and hereby agrees to
     waive the defense in any action for specific performance that a
     remedy at law would be adequate.

               (k)   Effect of Automatic Exchange of Class H Common
     Stock for $1 2/3 Par Value Common Stock.     If, pursuant to
     subparagraph (6) of paragraph (c) of Division I of Article FOURTH
     of the Certificate of Incorporation of General Motors (the
     "Exchange Provision"), there is a recapitalization of General
     Motors pursuant to which all the outstanding shares of Class H
     Common Stock are exchanged for shares of General Motors Common
     Stock $1 2/3 par value per share at the applicable Exchange Rate
     as more particularly described in said Certificate of
     Incorporation, the Put Right and the Over-Allotment Put provided
     for herein shall be adjusted such that each of the Put Shares
     shall be converted into an Exchange Adjusted Put Share, expressed
     as that number (calculated to the nearest five decimal places)
     which is the number of shares of $1 2/3 Par Value Common Stock
     which each share of Class H Common Stock is exchangeable into
     pursuant to the Exchange Provision and each such Exchange
     Adjusted Put Share shall be putable to General Motors at the
     time, Put Purchase Price and manner provided for in Section 8 of
     this Agreement with respect to the Put Share which was converted
     into such Exchange Adjusted Put Share.

               (l)   Adjustments.  If General Motors shall in any
     manner subdivide (by stock split, stock dividend or otherwise) or
     combine (by reverse stock split or otherwise) the number of
     shares of Class H Common Stock (or, after an exchange pursuant to
     the Exchange Provision, shares of General Motors Common Stock, $1
     2/3 par value per share), General Motors shall appropriately
     adjust all share amounts and dollar amounts related thereto set
     forth in this Agreement.  Issuance of shares of any class of
     General Motors common stock as a dividend on or as part of a
     reclassification or recapitalization of any other class of
     General Motors common stock shall not require an adjustment
     pursuant to this Section 10(l).  All such adjustments shall be
     made by General Motors in good faith.  No later than ten days
     after any such adjustment General Motors will provide to the
     Institute a written notice setting forth such adjustment and the
     basis therefor.

               (m)   Termination.  This Agreement and all rights,
     restrictions and obligations of General Motors and the Institute
     pursuant hereto shall terminate and shall have no further force
     and effect as of 5:00 p.m., New York City time, on the Put Date
     (as specified in Section 8(a)(z)), except that (a) the obligation
     of the Institute to pay Distribution Expenses upon demand by
     General Motors under Section 4 and the provisions of Sections
     2(d), 3, 5, 7 and 9 shall survive, (b) if any Distribution
     Closing has occurred, the provisions of Section 6 shall survive,
     (c) so long as any prospectus relating to the Registration
     Statement is required to be delivered, the provisions of Sections
     2(a)(vi), 2(b) and 2(e) shall survive, (d) if the Put Right has
     been exercised, any rights and obligations with respect to the
     purchase and sale of Put Shares to be purchased upon such
     exercise shall survive until the Put Closing, (e) if the
     Institute has entered into an underwriters' over-allotment
     option, the Over-Allotment Put shall survive until the Over-
     Allotment Put terminates pursuant to Section 8(h), the
     Underwriting Agreement containing such option is terminated, or
     the closing with respect to the exercise of the Over-Allotment
     Put, whichever occurs first, and (f) any rights and obligations
     hereunder arising prior to or on the Put Date (as specified in
     Section 8(a)(z)) and not discharged prior to or on such date
     shall continue until fully discharged.

               (n)   Limitation on Termination and Performance.   No
     action or failure to act by either party hereto shall constitute
     a breach or failure of performance sufficient to permit the other
     party to terminate this Agreement or fail to continue to be
     obligated to perform hereunder unless such action or failure to
     act is intentional, constitutes a clear and demonstrable failure
     to satisfy an obligation imposed by this Agreement and imposes a
     substantial disadvantage on the other party not remediable by
     monetary damages, which shall continue as a remedy for any such
     breach or failure of performance hereunder.

                         *     *     *     *     *


               IN WITNESS WHEREOF, the parties hereto have executed
     this Agreement as of the date first above written.

                                   HOWARD HUGHES MEDICAL INSTITUTE

                                   By:  /s/Carter F. Wolfe
                                   Name: Carter F. Wolfe
                                   Title: Vice President and Chief Investment
                                            Officer

                                   GENERAL MOTORS CORPORATION

                                   By: /s/Heidi Kunz                
                                   Name: Heidi Kunz
                                   Title: Vice President and Treasurer





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