GENETICS INSTITUTE INC
DEF 14A, 1995-04-06
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>   1
 
                                  SCHEDULE 14A
                                 (RULE 14A-101)
 
                    INFORMATION REQUIRED IN PROXY STATEMENT
 
                            SCHEDULE 14A INFORMATION
 
                  PROXY STATEMENT PURSUANT TO SECTION 14(A) OF
                      THE SECURITIES EXCHANGE ACT OF 1934
 
Filed by the Registrant  [X]
Filed by a Party other than the Registrant  [ ]
 
Check the appropriate box:
[ ]  Preliminary proxy statement
[ ]  Confidential, for Use of the Commission Only (as permitted by Rule
     14a-6(e)(2))
[X]  Definitive proxy statement
[ ]  Definitive additional materials
[ ]  Soliciting material pursuant to Rule 14a-11(c) or Rule 14a-12
 
                            GENETICS INSTITUTE, INC.
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified in Its Charter)
 
- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
 
Payment of Filing Fee (Check the appropriate box):
 
[X] $125 per Exchange Act Rules 0-11(c)(1)(ii), 14a-6(i)(1), or 14a-6(i)(2) or
     Item 22(a)(2) of Schedule 14A.
 
[ ] $500 per each party to the controversy pursuant to Exchange Act Rule
     14a-6(i)(3)
 
[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11
 
     (1)  Title of each class of securities to which transaction applies:
 
     (2)  Aggregate number of securities to which transaction applies:
 
     (3)  Per unit price or other underlying value of transaction computed
         pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the
         filing fee is calculated and state how it was determined):
 
     (4)  Proposed maximum aggregate value of transaction:
 
     (5)  Total fee paid:
 
[ ] Fee paid previously with preliminary materials.
 
[ ] Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2) and identify the filing for which the offsetting fee was paid
     previously. Identify the previous filing by registration statement number,
     or the form or schedule and the date of its filing.
 
     (1)  Amount previously paid:
 
     (2)  Form, schedule or registration statement no.:
 
     (3)  Filing party:
 
     (4)  Date filed:
<PAGE>   2
 
                            GENETICS INSTITUTE, INC.
 
                             87 CAMBRIDGEPARK DRIVE
                         CAMBRIDGE, MASSACHUSETTS 02140
                                 (617) 876-1170
 
              NOTICE OF ANNUAL MEETING OF STOCKHOLDERS TO BE HELD
 
                                  MAY 16, 1995
 
     The Annual Meeting of Stockholders of Genetics Institute, Inc. (the
"Company") will be held at The Charles Hotel, One Bennett Street, Cambridge,
Massachusetts on Tuesday, May 16, 1995 at 9:00 a.m., local time, to consider and
act upon the following matters:
 
          1. To elect three Class II directors to serve for the ensuing three
     years.
 
          2. To approve an amendment to the Company's 1991 Stock Option Plan to
     increase the aggregate number of the Company's Depositary Shares covered by
     such Plan from 4,400,000 to 5,700,000.
 
          3. To ratify the selection by the Board of Directors of Arthur
     Andersen LLP as the Company's independent public accountants for the
     current fiscal year.
 
          4. To transact such other business as may properly come before the
     meeting or any adjournment thereof.
 
     Stockholders of record at the close of business on March 24, 1995 will be
entitled to vote at the meeting or any adjournment thereof.
 
                                          By Order of the Board of Directors,
 
                                          LAWRENCE V. STEIN, Secretary
Cambridge, Massachusetts
April 6, 1995
 
     WHETHER OR NOT YOU EXPECT TO ATTEND THE MEETING, PLEASE COMPLETE, DATE AND
SIGN THE ENCLOSED PROXY OR VOTING INSTRUCTION CARD AND MAIL IT PROMPTLY IN THE
ENCLOSED ENVELOPE IN ORDER TO ASSURE REPRESENTATION OF YOUR SHARES. NO POSTAGE
NEED BE AFFIXED IF THE PROXY OR VOTING INSTRUCTION CARD IS MAILED IN THE UNITED
STATES.
<PAGE>   3
 
                            GENETICS INSTITUTE, INC.
 
                             87 CAMBRIDGEPARK DRIVE
                         CAMBRIDGE, MASSACHUSETTS 02140
 
               PROXY STATEMENT FOR ANNUAL MEETING OF STOCKHOLDERS
 
                                  MAY 16, 1995
 
     This Proxy Statement is furnished in connection with the solicitation of
proxies and voting instructions by the Board of Directors of Genetics Institute,
Inc. (the "Company") for use at the Annual Meeting of Stockholders to be held on
May 16, 1995 and at any adjournment of that meeting. All shares of Common Stock
will be voted in accordance with the stockholders' instructions. Any proxy or
voting instructions may be revoked by a stockholder at any time before its
exercise by delivery of written revocation to The First National Bank of Boston,
Shareholder Services Division, P. O. Box 1628, Boston, Massachusetts 02105-9903.
 
     The Company's Annual Report for the fiscal year ended December 31, 1994 is
being mailed to stockholders with the mailing of this Notice and Proxy Statement
on or about April 6, 1995.
 
     A COPY OF THE COMPANY'S ANNUAL REPORT ON FORM 10-K FOR THE FISCAL YEAR
ENDED DECEMBER 31, 1994 AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION,
EXCEPT FOR EXHIBITS, WILL BE FURNISHED WITHOUT CHARGE TO ANY STOCKHOLDER UPON
WRITTEN REQUEST TO THE DIRECTOR OF CORPORATE COMMUNICATIONS, GENETICS INSTITUTE,
INC., 87 CAMBRIDGEPARK DRIVE, CAMBRIDGE, MASSACHUSETTS 02140. EXHIBITS WILL BE
PROVIDED UPON WRITTEN REQUEST AND PAYMENT OF AN APPROPRIATE PROCESSING FEE.
 
TRANSACTION WITH AMERICAN HOME PRODUCTS CORPORATION
 
     On January 16, 1992, the Company's Common Stock stockholders approved the
Agreement and Plan of Merger, dated as of September 19, 1991 and amended as of
December 9, 1991 (the "Merger Agreement"), among the Company, American Home
Products Corporation ("AHP"), and an AHP affiliate, AHP Biotech Holdings, Inc.
("Holdings"), pursuant to which, among other things, (i) each share of Common
Stock then outstanding was converted into the right to receive $20.00 in cash
and six-tenths of a depositary share (a "Depositary Share"), each Depositary
Share representing one share of Common Stock subject to an AHP call option (the
"Call Option") and evidenced by a depositary receipt (a "Depositary Receipt"),
(ii) AHP acquired 40% of the Company's then outstanding Common Stock and (iii)
AHP purchased 9,466,709 shares of newly issued Common Stock (the "Additional
Shares") from the Company for $300 million in cash. As a result of the foregoing
transactions, subsequent open market purchases by AHP, and conversion of the
Company's Convertible Exchangeable Preferred Stock, effective July 15, 1993, AHP
owned, at January 31, 1995, approximately 64% of the outstanding shares of
Common Stock. In addition, in connection with the merger, the Company, AHP and
Holdings entered into a Governance Agreement (the "Governance Agreement")
summarized under "Election of Directors -- Certain Transactions." The merger,
the sale of Additional Shares and all related actions between the Company and
AHP contemplated by the Merger Agreement are collectively referred to herein as
the "AHP Transaction."
 
     Independent of its right to call the Depository Shares, AHP may acquire
additional shares of Genetics Institute stock, provided that its aggregate
holdings do not exceed 75% of the Company's stock outstanding, subject to
certain exceptions. Under the terms of the Call Option, AHP has the right, but
not the obligation, to purchase the shares of Common Stock represented by the
Depositary Shares and held by The First National Bank of Boston, as depositary
(the "Depositary"), in whole but not in part at any time on or prior to December
31, 1996, at per share call prices increasing by approximately $1.84 per share
per quarter from
<PAGE>   4
 
$72.11 per share for the period from January 1, 1995 through March 31, 1995 to
$85.00 per share for the period from October 1, 1996 through December 31, 1996.
In the event that AHP elects to call any shares of Common Stock, AHP must
purchase all of the shares that it does not already own. Accordingly, if the
Call Option is exercised, AHP will own 100% of the outstanding shares of Common
Stock of the Company, and all other stockholders of the Company will cease to
have any equity interest in the Company.
 
VOTING SECURITIES AND VOTES REQUIRED
 
     The Board of Directors has fixed March 24, 1995 as the record date (the
"Record Date") for determining stockholders who are entitled to vote at the
meeting. At the close of business on March 24, 1995, there were outstanding and
entitled to vote 26,637,273 shares of Common Stock, of which 10,636,532 are
represented by Depositary Shares outstanding on the Record Date. Each share of
Common Stock is entitled to one vote.
 
     The holders of Depositary Shares are entitled to one vote per Depositary
Share on all matters to be voted on by stockholders of the Company, in the same
manner and subject to the same limitations as any holder of shares of Common
Stock. The record holders of Depositary Shares on the Record Date will be
entitled to instruct the Depositary as to the exercise of the voting rights
pertaining to the number of shares of Common Stock represented by their
respective Depositary Shares by completing, dating and signing the enclosed
Voting Instruction Card. The Depositary will endeavor, insofar as practicable,
to vote the number of shares of Common Stock represented by such Depositary
Shares in accordance with such instructions, and the Company has agreed to take
all action that may be deemed necessary by the Depositary in order to enable the
Depositary to do so. The Depositary will abstain from voting shares of Common
Stock to the extent it does not receive specific instructions from the owners of
Depositary Shares.
 
     Pursuant to the Governance Agreement, AHP and Holdings have agreed to vote
their shares of Common Stock and Depositary Shares in any election of directors
for all nominees in proportion to the votes cast by the other holders of
Depositary Shares; provided that they may cast all of their votes (i) in favor
of any nominee designated by Holdings pursuant to the provisions of the
Governance Agreement and (ii) in their sole discretion in connection with any
election contest to which Rule 14a-11 under the Securities Exchange Act of 1934,
as amended, applies. Pursuant to the Governance Agreement, Holdings has agreed
to vote its Depositary Shares in proportion to the votes cast by other holders
of Depositary Shares in any vote to amend the terms of the Depositary Shares.
 
     The affirmative vote of the holders of a plurality of the shares of Common
Stock present or represented at the meeting is required for the election of
Class II directors. The affirmative vote of the holders of a majority of the
shares of Common Stock present or represented at the meeting is required for the
approval of the amendment to the 1991 Stock Option Plan and the ratification of
the selection of Arthur Andersen LLP as the Company's independent accountants
for the current fiscal year. Shares of Common Stock represented by executed
Voting Instruction Cards and proxies will be counted for purposes of
establishing a quorum at the Annual Meeting, regardless of how or whether such
shares are voted on any specific proposal. With respect to the required vote on
any particular matter, abstentions will be treated as votes cast or shares
present and represented, while votes withheld by nominee recordholders who did
not receive specific instructions from the beneficial owners of such shares will
not be treated as votes cast or as shares present or represented.
 
STOCK OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
     The following table sets forth information, as of January 31, 1995,
regarding the ownership of the Company's equity securities by (i) the only
persons known by the Company to own more than five percent of the outstanding
shares, (ii) all directors and nominees, (iii) each of the executive officers
named in the Summary Compensation Table (the "Named Executive Officers") and
(iv) all directors and executive
 
                                        2
<PAGE>   5
 
officers as a group. The number of shares beneficially owned by each director or
executive officer is determined under rules of the Securities and Exchange
Commission, and the information is not necessarily indicative of beneficial
ownership for any other purpose. Under such rules, beneficial ownership includes
any shares as to which the individual has sole or shared voting power or
investment power and also any shares which the individual has the right to
acquire within 60 days of January 31, 1995 through the exercise of any stock
option or other right. Unless otherwise indicated, each person has sole
investment and voting power (or shares such power with his or her spouse) with
respect to the shares set forth in the following table. The inclusion herein of
any Depositary Shares deemed beneficially owned does not constitute an admission
of beneficial ownership of those Depositary Shares.
 
<TABLE>
<CAPTION>
                                                                                               PERCENTAGE
                                    NUMBER OF SHARES                            PERCENTAGE     OF COMMON
       NAMES AND ADDRESSES         BENEFICIALLY OWNED          CLASS(1)          OF CLASS       STOCK(2)
- ---------------------------------- ------------------     ------------------    ----------     ----------
<S>                                    <C>                <C>                      <C>            <C>
5% Stockholders
AHP Biotech Holdings, Inc.........     16,000,741(3)      Common Stock             60.1%          60.1%
Five Giralda Farms                        947,000         Depositary Shares         8.9%           3.6%
Madison, NJ 07940
Spears, Benzak, Salomon & Farrell,               
  Inc.............................      1,686,851(4)      Depositary Shares        15.9%           6.3%
45 Rockefeller Plaza
33rd Floor
New York, NY 10111
Wellington Management Company.....        778,932(5)      Depositary Shares         7.3%           2.9%
75 State Street
Boston, MA 02109
Capital Research and Management           
  Company.........................        673,000(6)      Depositary Shares         6.3%           2.5%
333 South Hope Street
Los Angeles, CA 90071
 
Directors and Executive Officers
James G. Andress..................          6,000(7)      Depositary Shares            *             *
J. Richard Crout, M.D.............              0                                     --            --
Anthony B. Evnin..................         73,221(8)      Depositary Shares            *             *
Fred Hassan.......................              0(9)                                  --            --
Robert I. Levy, M.D...............              0(10)                                 --            --
Thomas P. Maniatis, Ph.D..........        229,000(11)     Depositary Shares         2.2%             *
Gabriel Schmergel.................        242,245(12)     Depositary Shares         2.2%             *
Benno C. Schmidt..................         57,638(13)     Depositary Shares            *             *
Tuan Ha-Ngoc......................        117,813(14)     Depositary Shares         1.1%             *
Patrick Gage, Ph.D................        115,840(15)     Depositary Shares         1.1%             *
Garen G. Bohlin...................        109,817(16)     Depositary Shares         1.0%             *
Lawrence V. Stein.................         26,027(17)     Depositary Shares            *             *
All directors and executive                      (18)
  officers as a group (15               1,125,459         Depositary Shares        10.0%           4.1%
  persons)........................
<FN> 
- ---------------
* Represents holding of less than one percent.
 
 (1) While the Depositary Shares are a separate class of securities, they represent shares of Common 
     Stock held by the Depositary and are therefore a subset of the total outstanding shares of Common 
     Stock.

</TABLE>
 
                                        3
<PAGE>   6
 
 (2) The percentages set forth in this column are based on the total outstanding
     shares of Common Stock as of January 31, 1995, including shares of Common
     Stock held by the Depositary subject to the Call Option, but excluding
     shares of Common Stock represented by Depositary Shares issuable upon
     exercise of options or warrants not exercisable within 60 days of January
     31, 1995.
 
 (3) Does not include the outstanding shares of Common Stock subject to the Call
     Option represented by Depositary Shares which Holdings may be deemed to
     beneficially own as a result of its ability to exercise the Call Option at
     any time.
 
 (4) Spears, Benzak, Salomon & Farrell, Inc. filed a Schedule 13G pursuant to
     Section 13 of the Securities Exchange Act of 1934, as amended, and the
     rules promulgated thereunder reporting its beneficial ownership of
     Depositary Shares of the Company as of February 6, 1995. Spears, Benzak,
     Salomon & Farrell, Inc. has no voting power and has shared dispositive
     power with respect to all Depositary Shares of the Company reported
     therein.
 
 (5) Wellington Management Company filed a Schedule 13G pursuant to Section 13
     of the Securities Exchange Act of 1934, as amended, and the rules
     promulgated thereunder reporting its beneficial ownership of Depositary
     Shares of the Company as of February 3, 1995. Wellington Management Company
     has shared voting power with respect to 420,500 of such Depositary Shares,
     and shared dispositive power with respect to all Depositary Shares of the
     Company reported therein.
 
 (6) The information presented herein is as reported in, and based solely upon,
     a Schedule 13F for the quarter ended December 31, 1994. Capital Research
     and Management Company had shared investment power and had no voting power
     with respect to all Depositary Shares reported therein.
 
 (7) Represents 6,000 Depositary Shares which Mr. Andress has the right to
     acquire under outstanding stock options exercisable within 60 days after
     January 31, 1995.
 
 (8) Includes 400 Depositary Shares held by Mr. Evnin's wife, as to which Mr.
     Evnin disclaims beneficial ownership. Also includes 45,729 Depositary
     Shares held by Venrock Associates, of which Mr. Evnin is a General Partner.
     Mr. Evnin shares voting and investment power with respect to the Depositary
     Shares held by Venrock Associates and disclaims beneficial ownership
     thereof. Also includes 14,000 Depositary Shares which Mr. Evnin has the
     right to acquire under outstanding stock options exercisable within 60 days
     after January 31, 1995.
 
 (9) Mr. Hassan has been designated as Holdings' nominee pursuant to the
     provisions of the Governance Agreement. Does not include shares of Common
     Stock and Depositary Shares held by Holdings. Also does not include the
     outstanding shares of Common Stock subject to the Call Option represented
     by Depositary Shares which Holdings may be deemed to beneficially own as a
     result of its ability to exercise the Call Option at any time. Mr. Hassan
     became a director, effective February 1, 1995, and is an officer of AHP and
     disclaims beneficial ownership of any such shares.
 
(10) Dr. Levy has been designated as Holdings' nominee pursuant to the
     provisions of the Governance Agreement.
 
(11) Includes 29,000 Depositary Shares which Dr. Maniatis has the right to
     acquire under outstanding stock options exercisable within 60 days after
     January 31, 1995.
 
(12) Includes 164,600 Depositary Shares which Mr. Schmergel has the right to
     acquire under outstanding stock options exercisable within 60 days after
     January 31, 1995.
 
(13) Includes 10,000 Depositary Shares which Mr. Schmidt has the right to
     acquire under outstanding stock options exercisable within 60 days after
     January 31, 1995. Also includes 15,900 Depositary Shares owned by Mr.
     Schmidt's spouse, as to which Mr. Schmidt disclaims beneficial ownership.
 
(14) Includes 105,500 Depositary Shares which Mr. Ha-Ngoc has the right to
     acquire under outstanding stock options exercisable within 60 days after
     January 31, 1995. Also includes 5,548 Depositary Shares
 
                                        4
<PAGE>   7
 
     owned by Mr. Ha-Ngoc's spouse and minor children, as to which Mr. Ha-Ngoc
     disclaims beneficial ownership.
 
(15) Includes 107,000 Depositary Shares which Dr. Gage has the right to acquire
     under outstanding stock options exercisable within 60 days after January
     31, 1995. Also includes 200 Depositary Shares held in trust for the benefit
     of Dr. Gage's child, as to which Dr. Gage disclaims beneficial ownership.
 
(16) Includes 101,100 Depositary Shares which Mr. Bohlin has the right to
     acquire under outstanding stock options exercisable within 60 days after
     January 31, 1995. Also includes 1,017 Depositary Shares held in trust for
     the benefit of Mr. Bohlin's minor child, as to which Mr. Bohlin disclaims
     beneficial ownership.
 
(17) Includes 21,000 Depositary Shares which Mr. Stein has the right to acquire
     under outstanding stock options exercisable within 60 days after January
     31, 1995.
 
(18) Includes a total of 652,500 Depositary Shares which directors and executive
     officers have the right to acquire under outstanding stock options
     exercisable within 60 days after January 31, 1995. Also includes Depositary
     Shares held by Venrock Associates.
 
                             ELECTION OF DIRECTORS
 
     The Company has a classified Board of Directors consisting of two Class I
directors, three Class II directors and three Class III directors. Subject to
the terms of the Governance Agreement, the Class I, Class II and Class III
directors will serve until the annual meetings of stockholders to be held in
1997, 1998 and 1996, respectively, and until their respective successors are
duly elected and qualified. At each annual meeting of stockholders, directors
are elected for a full term of three years to succeed those whose terms are
expiring.
 
     If a stockholder returns a proxy or Voting Instruction Card without
contrary instructions, the persons named as proxies or the Depositary, as the
case may be, will vote to elect as directors the three Class II director
nominees named below, each of whom is currently a member of the Board of
Directors of the Company.
 
     Each Class II director will be elected to hold office until the 1998 annual
meeting of stockholders and until his successor is duly elected and qualified.
All nominees have indicated their willingness to serve, if elected; however, if
any nominee should be unable to serve, the shares of Common Stock represented by
proxies or Voting Instruction Cards may be voted for a substitute nominee
designated by the Board of Directors, subject to the terms of the Governance
Agreement.
 
     The following table sets forth the name, age and length of service as a
director for each member of the Board of Directors, including the nominees for
election as Class II directors. It also includes information given by each
concerning all positions he holds with the Company, his principal occupation and
business experience for the past five years, the names of other publicly-held
companies of which he serves as a director and the year of the commencement of
his term as a director of the Company. Information with respect to the number of
shares of Common Stock beneficially owned by each director, directly or
indirectly, as of January 31, 1995, appears under "Stock Ownership of Certain
Beneficial Owners and Management."
 
            NOMINEES FOR TERMS EXPIRING IN 1998 (CLASS II DIRECTORS)
 
ANTHONY B. EVNIN, age 54, became a director in 1980.
 
     Mr. Evnin has served as a General Partner of Venrock Associates, a venture
     capital partnership, since 1975. He is also a Director of AgriDyne
     Technologies Inc., Arris Pharmaceutical Corporation, Athena Neurosciences,
     Inc., Centocor, Inc., IDEXX Laboratories, Inc., Intelligent Surgical
     Lasers, Inc., Kopin Corporation, Opta Food Ingredients, Inc. and SUGEN,
     Inc.
 
                                        5
<PAGE>   8
 
ROBERT I. LEVY, M.D., age 57, became a director in 1994.
 
     Dr. Levy has served since March 1992 as the President of Wyeth-Ayerst
     Research where he directs research and development for Wyeth-Ayerst, the
     pharmaceutical division of AHP. Previously, Dr. Levy served as the
     President of the Sandoz Research Institute from 1988 to 1992.
 
THOMAS P. MANIATIS, PH.D., age 51, became a director in 1980.
 
     Dr. Maniatis has served as Professor of Biochemistry and Molecular Biology
     at Harvard University since 1981. Dr. Maniatis is a founder of the Company.
 
            DIRECTORS WHOSE TERMS EXPIRE IN 1997 (CLASS I DIRECTORS)
 
JAMES G. ANDRESS, age 56, became a director in 1991.
 
     Mr. Andress has served as Chief Executive Officer, President and Director
     of Information Resources Inc. since 1989; Chairman Healthcare Products and
     Services for SmithKline Beecham PLC and Chairman Beecham Pharmaceuticals
     from 1988 to 1989; and President and Chief Operating Officer, and before
     such positions Vice President International, of Sterling Drug Company from
     1984 to 1988. He also serves as a Director of America On-Line, Inc.,
     Genelabs, Inc., The Liposome Company, Inc., NeoRx Corporation, OptionCare,
     Inc. and Sepracor, Inc.
 
BENNO C. SCHMIDT, age 82, became a director in 1980.
 
     Mr. Schmidt has served as Chairman of the Board of the Company since 1990;
     Senior Partner since January 1993 and Managing Partner from 1960 through
     1992 of J.H. Whitney & Co., a private venture capital investment firm, and
     a General Partner of J.H. Whitney & Co. since 1946. He also serves as a
     Director of Freeport-McMoRan Inc., Gilead Sciences, Inc., McMoRan Oil & Gas
     Co. and Vertex Pharmaceuticals, Incorporated. Mr. Schmidt was a director
     and officer of Vitarine Pharmaceuticals, Inc. which filed a voluntary
     petition under Chapter 11 of the Bankruptcy Code on May 24, 1991.
 
           DIRECTORS WHOSE TERMS EXPIRE IN 1996 (CLASS III DIRECTORS)
 
J. RICHARD CROUT, M.D., age 65, became a director in 1994.
 
     Dr. Crout is President of a private consulting firm in Bethesda, Maryland.
     Previously, he served as Vice President, Medical and Scientific Affairs at
     Boehringer Mannheim Pharmaceuticals Corporation from 1984 through 1993 and
     as a Scholar-in-Residence at the Institute of Medicine/National Academy of
     Sciences in Washington, D.C. during 1994. Dr. Crout also served as the
     Director and a Deputy Director of the Bureau of Drugs in the Food and Drug
     Administration, Department of Health and Human Services, from 1971 to 1982.
 
FRED HASSAN, age 49, became a director in 1992.
 
     Mr. Hassan has been a Senior Vice President of AHP since May 1993, after
     serving as Group Vice President of AHP since March 1993. He served as the
     President of the Wyeth-Ayerst Laboratories Division of AHP from 1989 to
     1993. Mr. Hassan previously served as Corporate Vice President, Chief
     Operating Officer and, subsequently, Chief Executive Officer, of Sandoz
     Pharmaceuticals Corporation from 1986 to 1989. Mr. Hassan became a director
     of AHP effective February 1, 1995.
 
                                        6
<PAGE>   9
 
GABRIEL SCHMERGEL, age 54, became a director in 1981.
 
     Mr. Schmergel has served as the President and Chief Executive Officer of
     the Company since 1981.
 
     The following table sets forth certain information as of January 31, 1995
regarding the beneficial ownership of the equity securities of American Home
Products Corporation by each director of the Company and by all directors and
executive officers of the Company as a group:
 
<TABLE>
<CAPTION>
                                                   NUMBER OF SHARES                       PERCENTAGE
                      NAME                        BENEFICIALLY OWNED         CLASS         OF CLASS
- ------------------------------------------------  ------------------     -------------    ----------
<S>                                                     <C>               <C>                 <C>
Mr. Andress.....................................             --               --              --
Dr. Crout.......................................             --               --              --
Mr. Evnin.......................................             --               --              --
Mr. Hassan......................................        108,141(1)        Common Stock        *
Dr. Levy........................................         51,168(2)        Common Stock        *
Dr. Maniatis....................................             --               --              --
Mr. Schmergel...................................             --               --              --
Mr. Schmidt.....................................             --               --              --
All directors and executive officers as a group
  (15 persons)..................................        159,309           Common Stock        *
<FN> 
- ---------------
* Represents holding of less than one percent.
 
(1) Includes 104,100 shares of Common Stock of AHP which Mr. Hassan has the
    right to acquire under outstanding stock options exercisable within 60 days
    after January 31, 1995. Also includes 3,966 shares of Common Stock of AHP
    owned by Mr. Hassan's wife, as to which Mr. Hassan disclaims beneficial
    ownership.
 
(2) Includes 50,000 shares of Common Stock of AHP which Dr. Levy has the right 
    to acquire under outstanding stock options exercisable within 60 days after 
    January 31, 1995.

</TABLE>
        
BOARD AND COMMITTEE MEETINGS
 
     The Company has a standing Audit Committee of the Board of Directors, which
provides the opportunity for direct contact between the Company's independent
public accountants and the Board. The Audit Committee met one time during fiscal
1994 to review the effectiveness of the auditors during the fiscal 1993 audit,
to review the adequacy of the fiscal 1993 financial statement disclosures, to
discuss the Company's internal control policies and procedures and to consider
and recommend the selection of the Company's independent accountants. The
members of the Audit Committee are Messrs. Evnin and Hassan. Pursuant to the
provisions of the Governance Agreement, the Audit Committee must include at
least one director designated by Holdings.
 
     The Company also has a standing Compensation Committee of the Board of
Directors, which provides recommendations to the Board regarding compensation
programs of the Company and administers the Company's 1991 Stock Option Plan,
1991 Employee Stock Purchase Plan and 1991 Restricted Stock Plan, including the
grant of stock options and the issuance of restricted shares to employees. The
Compensation Committee is also responsible for establishing and modifying the
compensation of all corporate officers of the Company (including compensation
pursuant to stock options and other employee benefit plans and arrangements),
adoption and amendment of all stock option and other employee benefit plans and
arrangements and the engagement of, terms of any employment agreements and
arrangements with, and termination of, all corporate officers of the Company.
The Compensation Committee met four times during fiscal 1994. The
 
                                        7
<PAGE>   10
 
members of the Compensation Committee are Messrs. Andress, Evnin and Hassan. See
"Report of the Compensation Committee." Pursuant to the provisions of the
Governance Agreement, the Compensation Committee must consist of one director
designated by Holdings and two other non-Holdings directors who are not officers
of the Company. In addition, the Compensation Committee may act only upon the
unanimous vote of all of its members.
 
     Pursuant to the Governance Agreement, the Company has also created an
Intellectual Property Committee and a Scientific Affairs Committee of the Board
of Directors, each of which must consist of two directors designated by Holdings
and two other non-Holdings directors. The members of the Intellectual Property
Committee are Messrs. Andress and Hassan and Drs. Maniatis and Levy. The
Intellectual Property Committee is responsible for the general review of the
Company's patent application strategy and for the approval of material decisions
regarding the Company's patent litigation strategy, including litigation
commencement, defense, prosecution and settlement. The Intellectual Property
Committee met three times during fiscal 1994.
 
     The members of the Scientific Affairs Committee are Messrs. Evnin and
Hassan and Drs. Maniatis and Levy. The Scientific Affairs Committee is
responsible for the general review of the Company's research programs and for
the approval of the Company's research budget. The Scientific Affairs Committee
met three times during fiscal 1994.
 
     Pursuant to the Governance Agreement, the Company also created a Nominating
Committee of the Board of Directors, which met one time during fiscal 1994. The
members of the Nominating Committee are Messrs. Schmergel and Schmidt and Dr.
Levy. The Nominating Committee has the exclusive authority to nominate
individuals to fill all Board positions except for the directors designated by
Holdings pursuant to the provisions of the Governance Agreement. The Nominating
Committee will consider nominees recommended by the Company's stockholders.
Stockholders wishing to nominate a person for election to the Board of Directors
should send a letter to the Secretary of the Company stating the name and
qualifications of the proposed nominee. The letter must be received 30 days
prior to the one-year anniversary of the date of the notice for the previous
year's Annual Meeting of Stockholders. Pursuant to the provisions of the
Governance Agreement, the Nominating Committee must consist of one director
designated by Holdings and two other non-Holdings directors. With respect to any
election of directors occurring prior to January 1, 1997, the Governance
Agreement provides that any nomination of a person not then serving as a
director or nominated or designated by Holdings shall require the unanimous
approval of the Nominating Committee.
 
     The Governance Agreement provides that each committee of the Board of
Directors (other than any special committee or committee of independent
directors or directors not designated by Holdings constituted for the purpose of
making any determination that is to be made by such a committee under the terms
of the Governance Agreement or otherwise) shall at all times include at least
one director designated by Holdings. The director designated by Holdings to
serve on any committee may designate as his alternate another director
designated by Holdings.
 
     The Board of Directors held six meetings during fiscal 1994. Each director
attended at least 75% of the total number of meetings of the Board of Directors
and the committees of the Board on which he served, except for Dr. Levy.
 
COMPENSATION FOR DIRECTORS -- STANDARD ARRANGEMENTS
 
     For their services to the Company, non-employee directors of the Company
receive cash payments in the amount of $2,000 for personally attending each
Board meeting, $500 for participating in each telephonic Board meeting, $1,000
for personally attending each committee meeting and $250 for participating in
each telephonic committee meeting. Directors who are employed by the Company do
not receive compensation for
 
                                        8
<PAGE>   11
 
attendance at Board or committee meetings. Directors are reimbursed for any
expenses attendant to Board membership. For services rendered during the fiscal
year ended December 31, 1994, Mr. Andress earned $11,500, Mr. Evnin earned
$16,250, Mr. Hassan earned $15,250, Dr. Maniatis earned $15,000 and Dr. Levy
earned $8,500 in director's fees.
 
COMPENSATION FOR DIRECTORS -- OTHER ARRANGEMENTS
 
     Mr. Schmidt, the Chairman of the Board, received in the year ended December
31, 1994, in lieu of the payments described in the preceding paragraph, an
annual retainer of $100,000 and is entitled to continue to receive such a
retainer so long as he is performing services on behalf of the Company. Dr.
Maniatis received annual consulting fees of $57,000 in connection with his
services to the Company as a consultant and as a member of the Company's
Scientific Advisory Board.
 
     Pursuant to the Company's 1990 Director Stock Option Plan (the "1990
Plan"), each non-employee director was granted an option for the purchase of
10,000 shares, exercisable over the five years following the date of grant.
Except for the option granted to Mr. Andress on October 22, 1991, all options
granted under the 1990 Plan were accelerated and became fully exercisable on
January 16, 1992, the date on which the AHP Transaction was consummated.
 
     Directors of the Company who (a) are not employees of the Company or AHP or
any subsidiary of the Company or AHP and (b) have not, since October 1, 1991,
received any stock option grant from the Company solely in their capacity as
directors are eligible to participate in the 1993 Director Option Plan (the
"1993 Plan"). Under the 1993 Plan, eligible directors of the Company
automatically received non-statutory options to purchase 10,000 Depositary
Shares of the Company at an exercise price equal to the fair market value of
such shares on the date of grant. The 1993 Plan also provides that options to
purchase 10,000 Depositary Shares shall be granted automatically to each person
who becomes an eligible director on the close of business on the date of his or
her initial election or appointment to the Board of Directors. The term of the
1993 Plan is five years.
 
     In 1994, Dr. Crout was granted an option to purchase 10,000 Depositary
Shares pursuant to the 1993 Plan at an exercise price of $41.75 per share. In
1993, pursuant to the 1993 Plan, each of Dr. Maniatis, Mr. Evnin and Mr. Schmidt
were granted options to purchase 10,000 Depositary Shares at an exercise price
of $27.75 per Depositary Share. Each such option is exercisable on a cumulative
basis in annual installments of 20% each on the succeeding five anniversaries of
the date of grant. Service as a director must be continuous for such vesting to
occur. If AHP exercises the Call Option prior to its expiration date, each
outstanding option shall automatically accelerate in part and become exercisable
as to that number of additional shares that would otherwise vest and be
purchasable on the next succeeding anniversary of the option grant date.
 
COMPENSATION OF EXECUTIVE OFFICERS
 
     Summary Compensation Table.  The following table sets forth certain
information concerning the compensation for each of the last three fiscal years
of the Company's Chief Executive Officer and the
 
                                        9
<PAGE>   12
Company's four other most highly compensated executive officers who were serving
as executive officers on December 31, 1994 (the "Named Executive Officers"):
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                       LONG-TERM COMPENSATION
                                                                       ----------------------
                                                                               AWARDS
                                                                       ----------------------
                                          ANNUAL COMPENSATION          RESTRICTED
                                     -----------------------------       STOCK       OPTIONS/      ALL OTHER
             NAME AND                          SALARY       BONUS       AWARDS         SARS      COMPENSATION
        PRINCIPAL POSITION           YEAR      ($)(1)      ($)(1)       ($)(2)         (#)          ($)(3)
- -----------------------------------  -----    --------     -------     ---------     --------   ---------------
<S>                                   <C>      <C>         <C>          <C>           <C>           <C>
Gabriel Schmergel..................   1994     410,000     105,000            0       50,000         10,026(4)
Chief Executive Officer               1993     380,000      80,000            0       30,000         12,139(4)
                                      1992     355,000      55,000      624,800       45,000         10,640(4)

Patrick Gage, Ph.D.................   1994     316,000      90,000            0            0          6,750
Chief Operating Officer               1993     278,417      60,000            0       60,000          8,932
                                      1992     253,000      50,000      468,600       35,000          4,661

Tuan Ha-Ngoc.......................   1994     245,000      62,000            0       30,000          6,750
Executive Vice President              1993     225,000      75,000            0       15,000          8,198
                                      1992     190,000      50,000      312,400       15,000          6,575

Garen G. Bohlin....................   1994     242,000      62,000            0       30,000          6,750
Executive Vice President and          1993     225,000      50,000            0       15,000          7,587
Chief Financial Officer               1992     203,000      40,000      312,400       15,000          6,433

Lawrence V. Stein..................   1994     215,000      62,000            0        5,000          6,750(5)
Senior Vice President,                1993     190,000      20,000            0            0        188,098
General Counsel and Secretary         1992      17,307           0      138,700       50,000              0

<FN> 
- ---------------
(1) Amounts shown represent cash compensation earned by the Named Executive Officers for the fiscal years presented.
 
(2) The value of the unvested restricted stock awards shown in the table is based on the market value of the Depositary Shares
    on the date of grant of the award, less the purchase price ($.01 per share). As of December 31, 1994, the number and value of
    aggregate restricted stock holdings were as follows: 10,000 shares ($359,900) by Mr. Schmergel; 7,500 shares ($269,925) by Dr.
    Gage; 5,000 shares ($179,950) by Mr. Ha-Ngoc; 5,000 shares ($179,950) by Mr. Bohlin and 2,500 shares ($89,975) by Mr. Stein. The
    value of unvested restricted stock holdings on December 31, 1994 was determined by multiplying the closing price of the Common
    Stock on that date ($36.00) by the number of shares held and subtracting the aggregate purchase price paid by each Named
    Executive Officer for such shares. No dividends were paid in 1994 on the restricted stock reported in this column.

(3) Amounts shown as "All Other Compensation" are amounts contributed or accrued by the Company for each fiscal year for the    
    Named Executive Officers under the Company's 401(k) Plan, except as set forth in note (4) below.
 
(4) Includes term life insurance premiums paid by the Company for the Named Executive Officer's benefit in the amounts of $3,276
    for 1994, $3,056 for 1993 and $2,836 for 1992. Also includes amounts contributed or accrued by the Company under the Company's
    401(k) Plan of $6,750 in 1994, $9,083 in 1993 and $7,804 in 1992.
 
(5) Includes $181,348 in relocation related compensation and $6,750 contributed or accrued by the Company under the Company's 
    401(k) Plan.

</TABLE>
 
                                      10
<PAGE>   13
     Option Grant Table.  The following table sets forth certain information
regarding options granted during the fiscal year ended December 31, 1994 by the
Company to the Named Executive Officers:
 
 
<TABLE>
<CAPTION>
                               OPTION/SAR GRANTS IN LAST FISCAL YEAR
                                         INDIVIDUAL GRANTS
                            --------------------------------------------
                              NUMBER OF       PERCENT OF
                             SECURITIES     TOTAL OPTIONS/
                             UNDERLYING      SARS GRANTED    EXERCISE OR                 GRANT DATE
                            OPTIONS/SARS     TO EMPLOYEES    BASE PRICE    EXPIRATION   PRESENT VALUE
           NAME             GRANTED(#)(1)   IN FISCAL YEAR    ($/SH)(2)       DATE         ($)(3)
- --------------------------  -------------   --------------   -----------   ----------   -------------
<S>                             <C>              <C>            <C>         <C>           <C>
Gabriel Schmergel.........      50,000           5.0%           48.75       01/18/04      1,191,300
Patrick Gage, Ph.D........           0           0.0%              --             --             --
Tuan Ha-Ngoc..............      30,000           3.0%           48.75       01/18/04        714,780
Garen G. Bohlin...........      30,000           3.0%           48.75       01/18/04        714,780
Lawrence V. Stein.........       5,000           0.5%           48.75       01/18/04        119,130

- ---------------
<FN> 
(1) Options become exercisable generally in five equal annual installments commencing on the first anniversary of the date of
    grant. In the event that Holdings exercises the Call Option on the Depositary Shares, the options fully vest.
 
(2) The exercise price is equal to the fair market value of the Company's Common Stock on the date of grant.
 
(3) The Black-Scholes valuation model assumes: (a) an expected option term of 10 years; (b) an interest rate that represents the
    interest rate on the 10-year U.S. Treasury Bond at the time of grant (5.692% for options granted on January 18, 1994);  
    (c)  volatility calculated using weekly stock prices since the AHP Transaction (22% for options granted on January 18, 1994); 
    (d)  no dividends will be paid; and (e) no adjustments for forfeitures or nontransferability.

</TABLE>
 
        Option Exercises and Year-End Values.  The following table sets forth
certain information concerning each exercise of stock options during the fiscal
year ended December 31, 1994 by each of the Named Executive Officers and the
number and value of unexercised options held by each of the Named Executive
Officers on December 31, 1994:

<TABLE>
<CAPTION>
 
                                  AGGREGATED OPTION/SAR EXERCISES IN LAST FISCAL YEAR
                                        AND FISCAL YEAR-END OPTION/SAR VALUES
 
                                                            NUMBER OF SECURITIES
                                SHARES                     UNDERLYING UNEXERCISED          VALUE OF UNEXERCISED
                               ACQUIRED                    OPTIONS/SARS AT FISCAL          IN-THE-MONEY OPTIONS
                                  ON         VALUE              YEAR-END (#)             AT FISCAL YEAR-END ($)(1)
                               EXERCISE     REALIZED     --------------------------     ---------------------------
           NAME                  (#)          ($)        EXERCISABLE/UNEXERCISABLE       EXERCISABLE/UNEXERCISABLE
- ---------------------------    --------     --------     --------------------------     ---------------------------
<S>                                <C>          <C>            <C>                            <C>
Gabriel Schmergel..........        0            0              132,600/112,000                881,600/228,750
Patrick Gage, Ph.D.........        0            0               93,000/ 74,000                317,200/141,125
Tuan Ha-Ngoc...............        0            0               90,000/ 57,000                703,500/ 92,250
Garen G. Bohlin............        0            0               84,600/ 58,000                700,100/ 93,750
Lawrence V. Stein..........        0            0               20,000/ 35,000                130,000/195,000

- ---------------
<FN> 
(1) Based on the fair market value of the Common Stock on December 31, 1994 ($36.00) less the option exercise price.

</TABLE>
 
                                      11
<PAGE>   14
 
COMPENSATION ARRANGEMENTS AND EMPLOYMENT AGREEMENTS
 
     Under the terms of its employment arrangements with certain key employees,
the Company loaned varying amounts of money to such employees in order to assist
them in establishing residences in Massachusetts. Generally, such loans are
subject to repayment at the earlier of sale of the residence or within 180 days
following termination of employment with the Company and are secured by a
mortgage on the residence. Upon repayment, the Company is entitled to receive
the entire outstanding principal balance plus the lesser of interest accrued on
the loan at a rate equal to 3% per annum or 20% of the net appreciation in the
value of the residence. During the Company's fiscal year 1994, and as of
December 31, 1994, Dr. Gage, Mr. Stein and Mr. Jack Morgan were indebted to the
Company under the terms of such loan agreements in the principal amounts
outstanding of $300,000, $200,000 and $110,000, respectively.
 
     All executive officers and employees of the Company are required to enter
into an invention and non-disclosure agreement, which includes certain
non-competition restrictions.
 
     In connection with, and as a condition to, the Merger, the Company entered
into employment agreements with certain of its executive officers and employees,
including Messrs. Schmergel, Bohlin and Ha-Ngoc and Dr. Gage. While these
employment agreements have expired, under the terms of his employment agreement
with the Company, Dr. Gage continues to be entitled to receive severance
payments for a period of twelve months following termination of employment in
certain circumstances at his then-existing annual base salary rate. As of
December 31, 1994, Dr. Gage's annual base salary was $316,000. The employment
agreement does not impose a duty on Dr. Gage to mitigate or offset other income.
Dr. Gage is, however, bound by certain non-compete obligations during such
twelve-month period.
 
     In November 1992, the Company entered into an employment agreement with Mr.
Stein. The employment agreement is for a term of three years and commenced on
November 16, 1992. Pursuant to the employment agreement, and as more fully
described above and under "Compensation of Executive Officers -- Summary
Compensation Table," Mr. Stein received a starting bonus of $10,000 and certain
relocation compensation and was granted certain stock options and restricted
stock which vest over time. The employment agreement also entitles Mr. Stein to
receive severance payments for a period of twelve months following termination
of employment in certain circumstances at his then-existing annual base salary
rate. As of December 31, 1994, Mr. Stein's annual base salary was $225,000. In
addition, if Mr. Stein's employment is terminated prior to the end of the
three-year term of his employment agreement in connection with a circumstance
which entitles him to receive severance payments, Mr. Stein's initial stock
options and restricted stock will continue to vest through November 16, 1995.
The employment agreement does not impose a duty on Mr. Stein to mitigate or
offset other income. Mr. Stein is, however, bound by certain non-compete
obligations during such twelve-month period.
 
REPORT OF THE COMPENSATION COMMITTEE
 
     The Company's executive compensation program is administered by the
Compensation Committee. Pursuant to the Governance Agreement between the Company
and AHP, membership of the Compensation Committee consists of three directors
who are not employees, one of whom is designated by Holdings. The Committee may
act only upon the unanimous vote of all members of the Committee.
 
     The Company's executive compensation program is designed to retain and
reward executives who are capable of leading the Company in achieving its
business objectives in the competitive and rapidly changing biotechnology
industry. All decisions by the Compensation Committee relating to the
compensation of the Company's executive officers are reviewed by the full Board,
except for decisions about awards under certain of the Company's stock-based
compensation plans, which must be made solely by the Committee in order for
 
                                       12
<PAGE>   15
 
the grants or awards under such plans to satisfy Securities Exchange Act Rule
16b-3. This report is submitted by the Compensation Committee and addresses the
Company's compensation policies for 1994 as they affected Gabriel Schmergel, the
President and Chief Executive Officer of the Company, and the four executive
officers other than Mr. Schmergel who, for 1994, were the Company's most highly
paid executives (collectively with Mr. Schmergel, the "Named Executives").
 
COMPENSATION PHILOSOPHY
 
     The objectives of the executive compensation program are to align
compensation with business objectives and individual performance, and to enable
the Company to attract, retain and reward executive officers who contribute to
the long-term success of the Company. The Company's executive compensation
philosophy is based on the following principles:
 
     - COMPETITIVE AND FAIR COMPENSATION
 
       The Company is committed to providing an executive compensation program
       that helps attract and retain highly qualified executives. To ensure that
       compensation is competitive, the Company regularly compares its
       compensation practices with those of other companies in the industry and
       sets its compensation guidelines based on this review. The Company also
       seeks to achieve a balance of the compensation paid to a particular
       individual and the compensation paid to other executives both inside the
       Company and at comparable companies.
 
     - SUSTAINED PERFORMANCE
 
       Executive officers are rewarded based upon corporate performance,
       business group performance and individual performance. Corporate
       performance and business group performance are evaluated by reviewing the
       extent to which strategic and business plan goals are met, including such
       factors as achievement of operating budgets, timely development and
       introduction of new products and performance relative to competitors.
       Individual performance is evaluated by reviewing attainment of specified
       individual objectives and the degree to which teamwork and Company values
       are fostered.
 
     In evaluating each Named Executive's performance, the Company generally
conforms to the following process:
 
     - Company and individual goals and objectives are set at the beginning of
       each annual performance cycle.
 
     - At the end of each annual performance cycle, the executive's manager or,
       in the case of the Chief Executive Officer, the Compensation Committee,
       evaluates accomplishment of the executive's goals and objectives and his
       contributions to the Company.
 
     - The executive's performance is then compared with peers within the
       Company and the results are communicated to the executive.
 
     - The comparative results, combined with comparative compensation practices
       of other leading companies in the industry, are then used to determine
       salary, bonus and stock compensation levels.
 
     Annual compensation for the Company's executives consists of salary, cash
bonus, stock options and/or restricted stock. The Compensation Committee sets
the base salary for executives by reviewing compensation for competitive
positions in the market and the historical compensation levels of the
executives. Increases in annual salaries are based on merit ratings measured by
actual individual performance against targeted performance and various
subjective performance criteria.
 
                                       13
<PAGE>   16
 
     The Company's bonus pool for executives other than Mr. Schmergel is
established at the beginning of each performance cycle. For fiscal 1994, the
bonus pool for all executives excluding Mr. Schmergel was fixed at a maximum of
$750,000 (approximately 23% of the aggregate officer base salary payroll), of
which $500,000 was tied specifically to the achievement of product development
and manufacturing goals for six projects, $125,000 was to be available based on
other accomplishments in the Company, and the remaining $125,000 was to be
available only if the Company met its budgeted financial target. Target product
development goals and target annual operating budgets used for purposes of
evaluating annual bonuses are based on business plans developed by management,
including Mr. Schmergel. Based on performance, $601,000 of the $750,000 bonus
pool was awarded. Total bonuses of $706,000 were awarded by the Compensation
Committee for 1994 performance, of which Mr. Schmergel received $105,000 and the
other four Named Executives received $276,000.
 
     Total compensation at the senior executive level also includes the
long-term incentives afforded by stock options and restricted stock awards. The
stock incentive programs are designed to promote the identity of long-term
interests between the Company's employees and its stockholders and assist in the
retention of key executives. In the case of stock options, the size of option
grants is generally intended by the Compensation Committee to reflect the
executive's position with the Company and his contributions to the Company.
Three of the five Named Executives of the Company have received a stock option
grant in each of the last three fiscal years (1992, 1993 and 1994). The option
program also uses a five-year vesting period to encourage key employees to
continue in the employ of the Company. In the event that Holdings exercises the
Call Option on the Depositary Shares, the stock options fully vest.
 
     The Compensation Committee surveyed employee stock option programs of
companies with similar capitalizations to the Company prior to determining
whether and to what extent it should grant options to the Named Executives for
fiscal 1994. While the value realizable from exercisable options is dependent
upon the extent to which the Company's performance is reflected in the market
price of the Company's Common Stock at any particular point in time, the
decision as to whether such value will be realized through the exercise of an
option in any particular year is primarily determined by each individual
executive and not by the Compensation Committee.
 
     The 1991 Restricted Stock Plan ("Plan") was designed to retain key
employees in the employ of the Company by providing the opportunity for
supplementary compensation based on continued employment and attainment of
certain performance goals. Of the 300,000 restricted shares reserved for
issuance under the Plan, 150,000 have been awarded to 31 key employees,
including 60,000 shares to the Named Executives. One half of these shares vest,
as to most recipients, two years after award and the remaining one half vest 10
years after award, subject however to acceleration of vesting if the Company
achieves certain financial and product development targets determined by the
Compensation Committee. Since restricted shares are issued at nominal
consideration ($.01 per share), the entire value of the shares will constitute
additional compensation at the time of vesting. Generally, unvested shares shall
be returned to the Company if the recipient leaves the employment of the Company
before vesting takes place.
 
     The Employee Stock Purchase Plan is available to all employees of the
Company, and generally permits employees to purchase shares at a discount of
approximately 15% from the fair market value at the beginning or end of the
applicable purchase period.
 
MR. SCHMERGEL'S 1994 COMPENSATION
 
     Mr. Schmergel is eligible to participate in the same executive compensation
plans available to the other Named Executives. The Compensation Committee has
set Mr. Schmergel's annual compensation at a level it
 
                                       14
<PAGE>   17
 
believes is competitive with other companies in the industry, including a
significant portion of his compensation based upon the Company's stock-based
program.
 
     Mr. Schmergel's salary for fiscal 1994 was increased $30,000 from $380,000
to $410,000. The Compensation Committee has accepted the recommendations of Mr.
Schmergel and the four Named Executives to freeze their base salaries at the
fiscal 1994 level for fiscal 1995. Mr. Schmergel's bonus award of $105,000 for
fiscal 1994 performance reflected attainment of his principal individual 1994
performance goals established by the Compensation Committee and was the highest
annual bonus paid to any Named Executive. In 1994, the Compensation Committee
also granted Mr. Schmergel an option for the purchase of 50,000 shares at an
exercise price equal to the fair market value per share at the date of grant. In
determining the number of shares covered by the option granted to Mr. Schmergel,
the Compensation Committee evaluated Mr. Schmergel's cash compensation relative
to that of other chief executives in the Company's industry, past option grants
and the number of restricted shares previously awarded to Mr. Schmergel under
the 1991 Restricted Stock Plan. The options are exercisable ratably over the
five years following the date of grant subject to Mr. Schmergel's employment
with the Company and such options vest fully in the event that Holdings
exercises the Call Option on the Depositary Shares. This option grant, together
with prior option grants and restricted stock, reflect the Compensation
Committee's policy of encouraging long-term performance and promoting retention
while further aligning stockholders' and management's interests in the
performance of the Company's Common Stock.
 
COMPLIANCE WITH INTERNAL REVENUE CODE SECTION 162(M)
 
     Section 162(m) of the Code, enacted in 1993, generally disallows a tax
deduction to public companies for compensation over $1 million paid to its chief
executive officer and its four other most highly compensated executive officers.
Qualifying performance-based compensation will not be subject to the deduction
limit if certain requirements are met. The Company currently intends to
structure its stock options granted to executive officers in a manner that
complies with the performance-based requirements of the new statute.
 
                                          Compensation Committee
 
                                          ANTHONY B. EVNIN, Chairman
                                          JAMES ANDRESS
                                          FRED HASSAN
 
COMPENSATION COMMITTEE AND INTERLOCKS AND INSIDER PARTICIPATION
 
     The members of the Compensation Committee are Messrs. Andress, Evnin and
Hassan. No executive officer of the Company is a member of the Compensation
Committee. Messrs. Andress and Evnin have each been granted options to purchase
Depositary Shares under the Company's 1990 Plan and Mr. Evnin has been granted
an option to purchase 10,000 Depositary Shares under the 1993 Plan. Pursuant to
the Call Option, Holdings has the right, but not the obligation, to purchase all
of the outstanding Common Stock of the Company. In addition, the Company has
entered into certain collaboration agreements with AHP. See "Transaction with
American Home Products Corporation" and "Certain Transactions."
 
                                       15
<PAGE>   18

<TABLE>
STOCK PERFORMANCE GRAPH
 
                             [PASTE UP C/R/C GRAPH]

<CAPTION>
- -------------------------------------------------------------------------------------------------
                                  Nov-89   Nov-90   Nov-91   Nov-92   Nov-93   Dec-93   Dec-94
- -------------------------------------------------------------------------------------------------
<S>                                  <C>      <C>      <C>      <C>      <C>      <C>      <C>
The Company                          100      126      120      120      179      189      141
S&P 500 Index                        100       93      108      125      133      135      133
DJ Medical & Biotechnology Index     100      131      258      283      230      243      277
- -------------------------------------------------------------------------------------------------
</TABLE>

In January 1992, the Company consummated the AHP Transaction. As a result, each
shareholder of the Company received $20 in cash and 0.6 Depositary Shares for
each share of Common Stock previously held. The above table and chart assume the
shareholder reinvested such $20 in additional Depositary Shares.
 
The above table and chart assume $100 invested on November 30, 1989 in the
Company's Common Stock, S&P 500 Index and Dow Jones Medical and Biotechnology
Index. Total Return assumes reinvestment of dividends. The Company's fiscal
year-end up to and including the end of the 1993 fiscal year was November 30.
Effective January 1, 1994, the Company changed its fiscal year-end to December
31. Data for the day preceding the commencement of the 1994 fiscal year is
depicted separately.
 
CERTAIN TRANSACTIONS
 
     In July 1994, the Company and Wyeth-Ayerst Laboratories, the pharmaceutical
division of AHP ("Wyeth-Ayerst"), agreed to form a 50/50 joint venture ("IL-12
Partners") to develop and commercialize rhIL-12 on a worldwide basis, except for
Japan. Mr. Hassan, a director of the Company, is a director and Senior Vice
President of AHP. Dr. Levy, also a director of the Company, is the President of
Wyeth-Ayerst Research where he directs the research and development for
Wyeth-Ayerst. IL-12 Partners has a joint project team and steering committee to
oversee current and future clinical trials and other development activities.
 
                                       16
<PAGE>   19
 
These activities will be funded equally by the partners. The arrangement also
provides for certain payments to the Company. In 1994, reimbursement for rhIL-12
research and development expenses by IL-12 Partners and initial milestone
payments by AHP to the Company were approximately $23.1 million. Future
milestone payments will become due upon achievement of certain clinical outcomes
and submission or approval of specific regulatory filings -- the exact value of
such payments is contingent upon rhIL-12's success in various therapeutic areas.
In addition, in 1994, reimbursable rhIL-12 research and development expenses by
IL-12 Partners which are payable to Wyeth-Ayerst were approximately $0.3
million, fifty percent of which was funded by the Company. The Company has the
right to supply rhIL-12 to the joint venture and will receive royalties based on
the joint venture's sales of rhIL-12. The Company will have marketing rights in
North America; Wyeth-Ayerst International will have marketing rights outside
North America and Japan.
 
     The Company has entered into various agreements with Wyeth-Ayerst related
to the commencement of a research and development collaboration in the area of
cellular adhesion proteins. Pursuant to these agreements, the Company recorded
revenues of $5.8 million during fiscal 1994. During fiscal 1994, Athena
Neurosciences, Inc. ("Athena") was also a participant in this research
collaboration. Mr. Evnin, a director of the Company, is also a director of
Athena. The Company provides no funding to, and receives no funding from, Athena
under the research collaboration.
 
     During fiscal 1993, the Company entered into a license agreement with AHP
pursuant to which it licensed to AHP certain rights to develop, use and market
the Company's recombinant human Interleukin-11 product in the Pacific Basin
(excluding Japan), Australia and New Zealand. The Company received no revenues
from this license agreement during fiscal 1994.
 
     The Company's affiliate, the GI-Yamanouchi European Partnership (the
"Partnership") entered into a sales and distribution agreement with Wyeth-Ayerst
International Inc. ("WAI"), an affiliate of AHP, under which WAI obtained
certain rights to distribute future products of the Partnership in Europe in the
field of localized bone repair. The Company holds the rights to supply the
Partnership with bulk protein for such products. In fiscal 1994, the Partnership
received no revenue under this agreement.
 
     The Company has several agreements with Wyeth-Ayerst and WAI under which
Wyeth-Ayerst and WAI have agreed to assist the Company in conducting clinical
trials of certain of the Company's products in Europe and the United States and
to perform fill and finish activities. During fiscal 1994, the Company made
payments of $0.8 million to either Wyeth-Ayerst or WAI pursuant to these
agreements.
 
     Under the terms of the Call Option granted pursuant to the AHP Transaction,
Holdings has the right, but not the obligation, to purchase the shares of Common
Stock represented by the Depositary Shares and held by the Depositary, at any
time on or prior to December 31, 1996, at per share call prices increasing by
approximately $1.84 per share per quarter from $72.11 per share for the period
from January 1, 1995 through March 31, 1995 to $85.00 per share for the period
from October 1, 1996 through December 31, 1996. In the event that Holdings
elects to call any shares of Common Stock, Holdings must purchase all of the
shares of Common Stock not owned by AHP or Holdings. Accordingly, if the Call
Option is exercised, Holdings will own 100% of the outstanding shares of Common
Stock of the Company, and all other stockholders of the Company will cease to
have any equity interest in the Company.
 
     The Governance Agreement provides, among other things, for (i) the
inclusion of nominees designated by Holdings on, and the change in composition
on January 1, 1997 of, an expanded Board of Directors of the Company, (ii) the
establishment of committees of the Board of Directors addressing compensation,
scientific affairs and intellectual property rights and the membership of the
directors designated by Holdings thereon, (iii) approval rights on the part of
the directors designated by Holdings with respect to material acquisitions by
the Company, dispositions of all or any substantial portion of its business or
assets, issuances and repurchases of equity securities, amendments to the
Certificate of Incorporation or By-laws of the Company
 
                                       17
<PAGE>   20
 
and any action otherwise within the purview of the intellectual property,
scientific affairs or compensation committees of the Board of Directors
established pursuant to the Governance Agreement which is presented to the full
Board for action, (iv) certain rights of first refusal granted to AHP with
respect to material licensing and marketing arrangements with third parties, (v)
certain restrictions on acquisitions and dispositions of shares of Common Stock
by AHP and its affiliates and (vi) certain agreements as to Holdings' voting of
its shares of Common Stock with respect to elections of directors and amendments
to the terms of the Depositary Shares. Independent of its right to call the
Depositary Shares, AHP is permitted by the terms of the Governance Agreement to
acquire additional shares of the Company's stock through open market purchases
or privately negotiated purchases, provided that its aggregate holdings do not
exceed 75% of the Company's stock outstanding subject to certain exceptions.
 
              APPROVAL OF AMENDMENT TO THE 1991 STOCK OPTION PLAN
 
     Under the Company's 1991 Stock Option Plan (the "1991 Option Plan"), the
Company is currently authorized to grant options to purchase up to an aggregate
of 4,400,000 Depositary Shares. To ensure that the Company may continue to
attract and retain key employees, the Board of Directors adopted, subject to the
approval of the stockholders, an amendment to the 1991 Option Plan increasing
from 4,400,000 to 5,700,000 the number of Depositary Shares available for
issuance under the 1991 Option Plan.
 
ADMINISTRATION AND ELIGIBILITY
 
     The 1991 Option Plan is administered by the Compensation Committee of the
Board of Directors. Both incentive options and non-statutory stock options may
be granted under the 1991 Option Plan. All employees, officers or directors of,
or consultants or advisors to, the Company are eligible to receive options under
the 1991 Option Plan. However, only employees of the Company are eligible to
receive incentive options.
 
OPTION TERMS AND PURCHASE PRICE
 
     The Compensation Committee, based on recommendations of management, selects
the optionees and determines (i) the number of shares subject to each option,
(ii) when the option becomes exercisable (generally in five equal annual
installments commencing on the first anniversary of the date of grant), (iii)
the exercise price, which cannot be less than 100% of the fair market value for
incentive options (or 110%, if the employee receiving such option is an owner of
10% or more of the total combined voting power of all classes of stock of the
Company) and cannot be less than 85% of the fair market value for non-statutory
options and (iv) the duration of the option, which cannot exceed ten years.
Options granted to officers and directors shall be made in compliance with Rule
16b-3.
 
     Payment of the option exercise price may be made in cash, Depositary Shares
or a combination of both. All options are nontransferable other than by will or
the laws of descent and distribution, and generally vested options are
exercisable during the lifetime of the optionee only while the optionee is in
the employ of the Company or within 90 days after termination of employment. In
the event that termination of employment is due to death, the vested option is
exercisable for a six-month period thereafter.
 
AMENDMENT AND TERMINATION
 
     The Board of Directors may at any time, and from time to time, modify or
amend the Plan in any respect, except that if at any time the approval of the
stockholders of the Company is required under Section 422 of the Code or any
successor provision with respect to incentive options, or under Rule 16b-3, the
Board of Directors may not effect such modification or amendment without such
approval. The 1991 Option Plan will terminate
 
                                       18
<PAGE>   21
 
on the earlier of (i) September 19, 2001 or (ii) the date on which all
Depositary Shares available for issuance under the 1991 Option Plan shall have
been issued.
 
CALL OPTION
 
     If Holdings exercises the Call Option on or prior to December 31, 1996, all
outstanding options granted pursuant to the 1991 Option Plan will automatically
accelerate and become fully vested and exercisable. Upon such purchase the
holders of such options shall promptly be paid for each such option an amount
equal to the product of (i) the excess of the Call Price over the exercise price
per Share, times (ii) the number of Depositary Shares covered by such option. If
the Call Option expires unexercised, all outstanding and unexercised options
granted under the 1991 Option Plan will automatically become options to purchase
shares of Common Stock, and any subsequent option grants under the 1991 Option
Plan will be for shares of Common Stock.
 
FEDERAL INCOME TAX CONSEQUENCES
 
     Options granted under the 1991 Option Plan may be either incentive options
or non-statutory options. The following is a summary of the United States
federal income tax treatment of each of these types of options.
 
     Incentive Options.  No taxable income will be recognized by the optionee
upon the grant of an incentive option under the 1991 Option Plan, and no taxable
income will generally be recognized upon exercise of the incentive option. The
optionee will, however, recognize taxable income in the year in which the
Depositary Shares acquired upon the exercise of the option are sold or otherwise
made the subject of a disposition.
 
     Generally, if the optionee holds Depositary Shares acquired upon the
exercise of incentive options until the later of (i) two years from the grant of
the option and (ii) one year from the date of transfer of the purchased
Depositary Shares to him or her (the "Statutory Holding Period"), any gain
recognized by the optionee on a sale or other disposition of the Depositary
Shares will be treated as long-term capital gain. The amount of gain recognized
will be equal to the excess of the amount realized upon the sale or other
disposition over the option price paid for the Depositary Shares.
 
     If the optionee sells or disposes of the stock prior to the expiration of
the Statutory Holding Period (a "disqualifying disposition"), he or she will
realize taxable income at ordinary income tax rates in an amount equal to the
lesser of (i) the excess of the fair market value of the Depositary Shares on
the date of exercise over the option price, or (ii) the amount realized upon
sale or other disposition less the option price. However, special rules may
apply to persons required to file reports under Section 16(b) of the Exchange
Act. Any additional gain will be treated as long-term capital gain if the
Depositary Shares are held for one year or more prior to the sale and as
short-term capital gain if the Depositary Shares are held for a shorter period.
 
     If the optionee makes a disqualifying disposition of the purchased
Depositary Shares, then the Company will be entitled to an income tax deduction,
for the taxable year in which such disposition occurs, equal in amount to the
ordinary income recognized by the optionee in connection with such disposition.
In no other instance will the Company be allowed a deduction with respect to the
optionee's acquisition or disposition of Depositary Shares pursuant to an
incentive option.
 
     Non-Statutory Options.  No taxable income is recognized by the optionee
upon the grant of a non-statutory option. The optionee will recognize ordinary
income, in the year in which the option is exercised, in an amount equal to the
excess of the fair market value of the purchased Depositary Shares on the date
of exercise over the option price, and the optionee will be required to satisfy
the tax withholding requirements applicable to such income. However, special
rules apply to persons required to file reports under Section 16(b) of the
Exchange Act. Any additional gain or any loss recognized upon the subsequent
disposition of the purchased Depositary Shares will be a capital gain or loss,
and will be a long-term gain or loss if the Depositary Shares are held for one
year or more.
 
                                       19
<PAGE>   22
 
     The Company will be entitled to a business expense deduction equal to the
amount of ordinary income recognized by the optionee.
 
BOARD RECOMMENDATION
 
     The Board of Directors believes that the adoption and approval of the
amendment to the 1991 Stock Option Plan is in the best interests of the Company
and its stockholders and recommends a vote FOR this proposal.
 
          RATIFICATION OF SELECTION OF INDEPENDENT PUBLIC ACCOUNTANTS
 
     The Board of Directors, on the recommendation of its Audit Committee, has
selected the firm of Arthur Andersen LLP as the Company's independent public
accountants for the fiscal year ending December 31, 1995. Although stockholder
approval of the Board of Directors' selection of Arthur Andersen LLP is not
required by law, the Board of Directors believes that it is advisable to give
stockholders an opportunity to ratify this selection. If this proposal is not
approved at the Annual Meeting, the Board of Directors will reconsider its
selection of Arthur Andersen LLP.
 
     Representatives of Arthur Andersen LLP are expected to be present at the
Annual Meeting. They will have the opportunity to make a statement if they
desire to do so and will also be available to respond to appropriate questions
from stockholders.
 
                                 OTHER MATTERS
 
     Management does not know of any other matters which may come before the
meeting. However, if any other matters are properly presented to the meeting, it
is the intention of persons named in the accompanying proxy to vote, or
otherwise act, in accordance with their judgment on such matters.
 
     All costs of solicitations of proxies will be borne by the Company. In
addition to solicitations by mail, the Company's directors, officers and regular
employees, without additional remuneration, may solicit proxies by telephone,
telegraph and personal interviews. Brokers, custodians and fiduciaries will be
requested to forward proxy soliciting material to the owners of stock held in
their names, and the Company will reimburse them for their out-of-pocket
expenses in this connection.
 
DEADLINE FOR SUBMISSION OF STOCKHOLDER PROPOSALS
 
     Proposals of stockholders intended to be presented at the 1996 Annual
Meeting of Stockholders must be received by the Company at its principal office
in Cambridge, Massachusetts no later than December 6, 1995 for inclusion in the
proxy statement for that meeting.
 
                                          By Order of the Board of Directors,
 
                                          LAWRENCE V. STEIN, Secretary
 
April 6, 1995
 
THE BOARD OF DIRECTORS HOPES THAT STOCKHOLDERS WILL ATTEND THE MEETING. WHETHER
OR NOT YOU PLAN TO ATTEND, YOU ARE URGED TO COMPLETE, DATE, SIGN AND RETURN THE
ENCLOSED PROXY OR VOTING INSTRUCTION CARD IN THE ACCOMPANYING ENVELOPE. PROMPT
RESPONSE WILL GREATLY FACILITATE ARRANGEMENTS FOR THE MEETING AND YOUR
COOPERATION WILL BE APPRECIATED.
 
                                       20
<PAGE>   23


                              GENETICS INSTITUTE, INC.

                               1991 STOCK OPTION PLAN



         1.   Purpose. 
              -------

              The purpose of this plan (the "Plan") is to secure for
         Genetics Institute, Inc. (the "Company") and its shareholders the
         benefits arising from capital stock ownership by employees,
         officers and directors of, and consultants or advisors to, the
         Company and its parent and subsidiary corporations who are ex-
         pected to contribute to the Company's future growth and success.
         Except where the context otherwise requires, the term "Company"
         shall include the parent and all present and future subsidiaries
         of the Company as defined in Sections 424(e) and 424(f) of the
         Internal Revenue Code of 1986, as amended or replaced from time to
         time (the "Code").  Those provisions of the Plan which make
         express reference to Section 422 shall apply only to Incentive
         Stock Options (as that term is defined in the Plan).

              Concurrently with adoption of the Plan, the Company is
         terminating the 1982 Incentive Stock Option Plan and the 1982 Non-
         Qualified Stock Option Plan (collectively, the "Prior Plans").
         Notwithstanding the aforesaid, the termination of the Prior Plans
         shall not affect the rights of the holder of any options granted
         under the Prior Plans.

         2.   Type of Options and Administration. 
              ----------------------------------

              (a)  TYPES OF OPTIONS.  Options granted pursuant to the Plan
         shall be authorized by action of the Board of Directors of the
         Company (or a Committee designated by the Board of Directors) and
         may be either incentive stock options ("Incentive Stock Options")
         meeting the requirements of Section 422 of the Code or non-
         statutory options which are not intended to meet the requirements
         of Section 422 of the Code.  

              (b)  ADMINISTRATION.  The Plan will be administered by the
         Board of Directors of the Company, whose construction and
         interpretation of the terms and provisions of the Plan shall be
         final and conclusive.  The Board of Directors may in its sole
         discretion grant options to purchase shares of the Company's
         Common Stock ("Common Stock") and issue shares upon exercise of
         such options as provided in the Plan.  The Board shall have
         authority, subject to the express provisions of the Plan, to
         construe the respective option agreements and the Plan, to
         prescribe, amend and rescind rules and regulations relating to the
         Plan, to determine the terms and provisions of the respective
<PAGE>   24

         option agreements, which need not be identical, and to make all
         other determinations in the judgment of the Board of Directors
         necessary or desirable for the administration of the Plan.  The
         Board of Directors may correct any defect or supply any omission
         or reconcile any inconsistency in the Plan or in any option
         agreement in the manner and to the extent it shall deem expedient
         to carry the Plan into effect and it shall be the sole and final
         judge of such expediency.  No director or person acting pursuant
         to authority delegated by the Board of Directors shall be liable
         for any action or determination under the Plan made in good faith.
         The Board of Directors may, to the full extent permitted by or
         consistent with applicable laws or regulations (including, without
         limitation, applicable state law and Rule 16b-3 promulgated under
         the Securities Exchange Act of 1934 (the "Exchange Act"), or any
         successor rule ("Rule 16b-3")), delegate any or all of its powers
         under the Plan to a committee (the "Committee") appointed by the
         Board of Directors, and if the Committee is so appointed all
         references to the Board of Directors in the Plan shall mean and
         relate to such Committee.  

              (c)  APPLICABILITY OF RULE 16B-3.  Those provisions of the
         Plan which make express reference to Rule 16b-3 shall apply only
         to such persons as are required to file reports under
         Section 16(a) of the Exchange Act (a "Reporting Person").

         3.   Eligibility. 
              -----------

              (a)  GENERAL.  Options may be granted to persons who are, at
         the time of grant, employees, officers or directors of, or
         consultants or advisors to, the Company; PROVIDED, that the class
         of employees to whom Incentive Stock Options may be granted shall
         be limited to all employees of the Company.  A person who has been
         granted an option may, if he or she is otherwise eligible, be
         granted additional options if the Board of Directors shall so
         determine.  

              (B)  GRANT OF OPTIONS TO DIRECTORS AND OFFICERS.  From and
         after the registration of the Common Stock of the Company under
         the Exchange Act, the selection of a director or an officer (as
         the terms "director" and "officer" are defined for purposes of
         Rule 16b-3) as a recipient of an option, the timing of the option
         grant, the exercise price of the option and the number of shares
         subject to the option shall be determined either (i) by the Board
         of Directors, of which all members shall be "disinterested
         persons" (as hereinafter defined), or (ii) by two or more
         directors having full authority to act in the matter, each of whom
         shall be a "disinterested person."  For the purposes of the Plan,
         a director shall be deemed to be a "disinterested person" only if


                                        -2-
<PAGE>   25

         such person qualifies as a "disinterested person" within the
         meaning of Rule 16b-3, as such term is interpreted from time to
         time.  

         4.   Stock Subject to Plan. 
              ---------------------

              Subject to adjustment as provided in Section 14 below, the
         maximum number of shares of Common Stock of the Company which may
         be issued and sold under the Plan is 1,800,000 shares.  If an
         option granted under the Plan shall expire or terminate for any
         reason without having been exercised in full, the unpurchased
         shares subject to such option shall again be available for sub-
         sequent option grants under the Plan.  If shares issued upon
         exercise of an option under the Plan are tendered to the Company
         in payment of the exercise price of an option granted under the
         Plan, such tendered shares shall again be available for subsequent
         option grants under the Plan; provided, that in no event shall
         (i) the total number of shares issued pursuant to the exercise of
         Incentive Stock Options under the Plan, on a cumulative basis,
         exceed the maximum number of shares authorized for issuance under
         the Plan exclusive of shares made available for issuance pursuant
         to this sentence or (ii) the total number of shares issued
         pursuant to the exercise of options by Reporting Persons, on a
         cumulative basis, exceed the maximum number of shares authorized
         for issuance under the Plan exclusive of shares made available for
         issuance pursuant to this sentence.

         5.   Forms of Option Agreements.  
              --------------------------

              As a condition to the grant of an option under the Plan, each
         recipient of an option shall execute an option agreement in such
         form not inconsistent with the Plan as may be approved by the
         Board of Directors.  Such option agreements may differ among
         recipients.

         6.   Purchase Price. 
              --------------

              (a)  GENERAL.  The purchase price per share of stock deliver-
         able upon the exercise of an option shall be determined by the
         Board of Directors, PROVIDED, HOWEVER, that in the case of an
         Incentive Stock Option, the exercise price shall not be less than
         100% of the fair market value of such stock, as determined by the
         Board of Directors, at the time of grant of such option, or less
         than 110% of such fair market value in the case of options
         described in Section 11(b).

              (b)  PAYMENT OF PURCHASE PRICE.  Options granted under the
         Plan may provide for the payment of the exercise price by delivery
         of cash or a check to the order of the Company in an amount equal
         to the exercise price of such options, or, to the extent provided


                                        -3-
<PAGE>   26

         in the applicable option agreement, (i) by delivery to the Company
         of shares of Common Stock of the Company already owned by the
         optionee having a fair market value equal in amount to the
         exercise price of the options being exercised, (ii) by any other
         means (including, without limitation, by delivery of a promissory
         note of the optionee payable on such terms as are specified by the
         Board of Directors) which the Board of Directors determines are
         consistent with the purpose of the Plan and with applicable laws
         and regulations (including, without limitation, the provisions of
         Rule 16b-3 and Regulation T promulgated by the Federal Reserve
         Board) or (iii) by any combination of such methods of payment.
         The fair market value of any shares of the Company's Common Stock
         or other non-cash consideration which may be delivered upon
         exercise of an option shall be determined by the Board of
         Directors.

         7.   Option Period. 
              -------------

              Each option and all rights thereunder shall expire on such
         date as shall be set forth in the applicable option agreement,
         except that, in the case of an Incentive Stock Option, such date
         shall not be later than ten years after the date on which the
         option is granted and, in all cases, options shall be subject to
         earlier termination as provided in the Plan.

         8.   Exercise of Options. 
              -------------------

              Each option granted under the Plan shall be exercisable
         either in full or in installments at such time or times and during
         such period as shall be set forth in the agreement evidencing such
         option, subject to the provisions of the Plan.  

         9.   Nontransferability of Options. 
              -----------------------------

              Incentive Stock Options, and all options granted to Reporting
         Persons, shall not be assignable or transferable by the person to
         whom they are granted, either voluntarily or by operation of law,
         except by will or the laws of descent and distribution, and,
         during the life of the optionee, shall be exercisable only by the
         optionee; provided, however, that non-statutory options may be
         transferred pursuant to a qualified domestic relations order (as
         defined in Rule 16b-3).

         10.  Effect of Termination of Employment or Other Relationship.
              ---------------------------------------------------------

              Except as provided in Section 11(d) with respect to Incentive
         Stock Options, and subject to the provisions of the Plan, the
         Board of Directors shall determine the period of time during which
         an optionee may exercise an option following (i) the termination
         of the optionee's employment or other relationship with the


                                        -4-
<PAGE>   27

         Company or (ii) the death or disability of the optionee.  Such
         periods shall be set forth in the agreement evidencing such
         option. 

         11.  Incentive Stock Options.
              -----------------------

              Options granted under the Plan which are intended to be
         Incentive Stock Options shall be subject to the following
         additional terms and conditions:

              (a)  EXPRESS DESIGNATION.  All Incentive Stock Options
         granted under the Plan shall, at the time of grant, be
         specifically designated as such in the option agreement covering
         such Incentive Stock Options. 

              (b)  10% SHAREHOLDER.  If any employee to whom an Incentive
         Stock Option is to be granted under the Plan is, at the time of
         the grant of such option, the owner of stock possessing more than
         10% of the total combined voting power of all classes of stock of
         the Company (after taking into account the attribution of stock
         ownership rules of Section 424(d) of the Code), then the following
         special provisions shall be applicable to the Incentive Stock
         Option granted to such individual:

                   (i)  The purchase price per share of the Common Stock
              subject to such Incentive Stock Option shall not be less than
              110% of the fair market value of one share of Common Stock at
              the time of grant; and 

                  (ii)  the option exercise period shall not exceed five
              years from the date of grant.  

              (c)  DOLLAR LIMITATION.  For so long as the Code shall so
         provide, options granted to any employee under the Plan (and any
         other incentive stock option plans of the Company) which are
         intended to constitute Incentive Stock Options shall not
         constitute Incentive Stock Options to the extent that such
         options, in the aggregate, become exercisable for the first time
         in any one calendar year for shares of Common Stock with an
         aggregate fair market value (determined as of the respective date
         or dates of grant) of more than $100,000.

              (D)  TERMINATION OF EMPLOYMENT, DEATH OR DISABILITY.  No
         Incentive Stock Option may be exercised unless, at the time of
         such exercise, the optionee is, and has been continuously since
         the date of grant of his or her option, employed by the Company,
         except that:


                                        -5-
<PAGE>   28

                   (i)  an Incentive Stock Option may be exercised within
              the period of three months after the date the optionee ceases
              to be an employee of the Company (or within such lesser
              period as may be specified in the applicable option
              agreement), PROVIDED, that the agreement with respect to such
              option may designate a longer exercise period and that the
              exercise after such three-month period shall be treated as
              the exercise of a non-statutory option under the Plan;

                  (ii)  if the optionee dies while in the employ of the
              Company, or within three months after the optionee ceases to
              be such an employee, the Incentive Stock Option may be
              exercised by the person to whom it is transferred by will or
              the laws of descent and distribution within the period of one
              year after the date of death (or within such lesser period as
              may be specified in the applicable option agreement); and

                 (iii)  if the optionee becomes disabled (within the
              meaning of Section 22(e)(3) of the Code or any successor
              provision thereto) while in the employ of the Company, the
              Incentive Stock Option may be exercised within the period of
              one year after the date the optionee ceases to be such an
              employee because of such disability (or within such lesser
              period as may be specified in the applicable option
              agreement).

         For all purposes of the Plan and any option granted hereunder,
         "employment" shall be defined in accordance with the provisions of
         Section 1.421-7(h) of the Income Tax Regulations (or any successor
         regulations).  Notwithstanding the foregoing provisions, no
         Incentive Stock Option may be exercised after its expiration date.

         12.  Additional Provisions.
              ---------------------

              (a)  ADDITIONAL OPTION PROVISIONS.  The Board of Directors
         may, in its sole discretion, include additional provisions in
         option agreements covering options granted under the Plan,
         including without limitation restrictions on transfer, repurchase
         rights, commitments to pay cash bonuses, to make, arrange for or
         guaranty loans or to transfer other property to optionees upon
         exercise of options, or such other provisions as shall be
         determined by the Board of Directors; PROVIDED THAT such
         additional provisions shall not be inconsistent with any other
         term or condition of the Plan and such additional provisions shall
         not cause any Incentive Stock Option granted under the Plan to
         fail to qualify as an Incentive Stock Option within the meaning of
         Section 422 of the Code.


                                        -6-
<PAGE>   29

              (b)  ACCELERATION, EXTENSION, ETC.  The Board of Directors
         may, in its sole discretion, (i) accelerate the date or dates on
         which all or any particular option or options granted under the
         Plan may be exercised or (ii) extend the dates during which all,
         or any particular, option or options granted under the Plan may be
         exercised; PROVIDED, HOWEVER, that no such extension shall be
         permitted if it would cause the Plan to fail to comply with
         Section 422 of the Code or with Rule 16b-3.

         13.  Rights as a Shareholder.
              -----------------------

              The holder of an option shall have no rights as a shareholder
         with respect to any shares covered by the option (including,
         without limitation, any rights to receive dividends or non-cash
         distributions with respect to such shares) until the date of issue
         of a stock certificate to him or her for such shares.  No adjust-
         ment shall be made for dividends or other rights for which the
         record date is prior to the date such stock certificate is issued.

         14.  Adjustment Provisions for Recapitalizations and Related 
              -------------------------------------------------------
              Transactions.
              ------------

              (a)  GENERAL.  Except as provided for in Section 23, if,
         through or as a result of any merger, consolidation, sale of all
         or substantially all of the assets of the Company, reorganization,
         recapitalization, reclassification, stock dividend, stock split,
         reverse stock split or other similar transaction, (i) the
         outstanding shares of Common Stock are increased, decreased or
         exchanged for a different number or kind of shares or other
         securities of the Company, or (ii) additional shares or new or
         different shares or other securities of the Company or other
         non-cash assets are distributed with respect to such shares of
         Common Stock or other securities, an appropriate and proportionate
         adjustment may be made in (x) the maximum number and kind of
         shares reserved for issuance under the Plan, (y) the number and
         kind of shares or other securities subject to any then outstanding
         options under the Plan, and (z) the price for each share subject
         to any then outstanding options under the Plan, without changing
         the aggregate purchase price as to which such options remain
         exercisable.  Notwithstanding the foregoing, no adjustment shall
         be made pursuant to this Section 14 if such adjustment would cause
         the Plan to fail to comply with Section 422 of the Code or with
         Rule 16b-3.

              (b)  Board Authority to Make Adjustments.  Any adjustments
         under this Section 14 will be made by the Board of Directors,
         whose determination as to what adjustments, if any, will be made
         and the extent thereof will be final, binding and conclusive.  No
         fractional shares will be issued under the Plan on account of any
         such adjustments.



                                        -7-
<PAGE>   30

         15.  Merger, Consolidation, Asset Sale, Liquidation, etc.
              ---------------------------------------------------

              (a)  GENERAL.  Except as provided for in Section 23, in the
         event of a consolidation or merger or sale of all or substantially
         all of the assets of the Company in which outstanding shares of
         Common Stock are exchanged for securities, cash or other property
         of any other corporation or business entity or in the event of a
         liquidation of the Company, the Board of Directors of the Company,
         or the board of directors of any corporation assuming the
         obligations of the Company, may, in its discretion, take any one
         or more of the following actions, as to outstanding options:
         (i) provide that such options shall be assumed, or equivalent
         options shall be substituted, by the acquiring or succeeding
         corporation (or an affiliate thereof), PROVIDED that any such
         options substituted for Incentive Stock Options shall meet the
         requirements of Section 424(a) of the Code, (ii) upon written
         notice to the optionees, provide that all unexercised options will
         terminate immediately prior to the consummation of such
         transaction unless exercised by the optionee within a specified
         period following the date of such notice, (iii) in the event of a
         merger under the terms of which holders of the Common Stock of the
         Company will receive upon consummation thereof a cash payment for
         each share surrendered in the merger (the "Merger Price"), make or
         provide for a cash payment to the optionees equal to the
         difference between (A) the Merger Price times the number of shares
         of Common Stock subject to such outstanding options (to the extent
         then exercisable at prices not in excess of the Merger Price) and
         (B) the aggregate exercise price of all such outstanding options
         in exchange for the termination of such options, and (iv) provide
         that all or any outstanding options shall become exercisable in
         full immediately prior to such event.

              (b)  SUBSTITUTE OPTIONS.  The Company may grant options under
         the Plan in substitution for options held by employees of another
         corporation who become employees of the Company, or a subsidiary
         of the Company, as the result of a merger or consolidation of the
         employing corporation with the Company or a subsidiary of the
         Company, or as a result of the acquisition by the Company, or one
         of its subsidiaries, of property or stock of the employing
         corporation.  The Company may direct that substitute options be
         granted on such terms and conditions as the Board of Directors
         considers appropriate in the circumstances.

         16.  No Special Employment Rights.
              ----------------------------

              Nothing contained in the Plan or in any option shall confer
         upon any optionee any right with respect to the continuation of
         his or her employment by the Company or interfere in any way with
         the right of the Company at any time to terminate such employment
         or to increase or decrease the compensation of the optionee.  



                                        -8-
<PAGE>   31

         17.  Other Employee Benefits.  
              -----------------------

              Except as to plans which by their terms include such amounts
         as compensation, the amount of any compensation deemed to be
         received by an employee as a result of the exercise of an option
         or the sale of shares received upon such exercise will not
         constitute compensation with respect to which any other employee
         benefits of such employee are determined, including, without
         limitation, benefits under any bonus, pension, profit-sharing,
         life insurance or salary continuation plan, except as otherwise
         specifically determined by the Board of Directors.  

         18.  Amendment of the Plan.
              ---------------------

              (a)  The Board of Directors may at any time, and from time to
         time, modify or amend the Plan in any respect, except that if at
         any time the approval of the shareholders of the Company is
         required under Section 422 of the Code or any successor provision
         with respect to Incentive Stock Options, or under Rule 16b-3, the
         Board of Directors may not effect such modification or amendment
         without such approval.

              (b)  The termination or any modification or amendment of the
         Plan shall not, without the consent of an optionee, affect his or
         her rights under an option previously granted to him or her.  With
         the consent of the optionee affected, the Board of Directors may
         amend outstanding option agreements in a manner not inconsistent
         with the Plan.  The Board of Directors shall have the right to
         amend or modify (i) the terms and provisions of the Plan and of
         any outstanding Incentive Stock Options granted under the Plan to
         the extent necessary to qualify any or all such options for such
         favorable federal income tax treatment (including deferral of
         taxation upon exercise) as may be afforded incentive stock options
         under Section 422 of the Code and (ii) the terms and provisions of
         the Plan and of any outstanding option to the extent necessary to
         ensure the qualification of the Plan under Rule 16b-3.

         19.  Withholding.
              -----------

              (a)  The Company shall have the right to deduct from payments
         of any kind otherwise due to the optionee any federal, state or
         local taxes of any kind required by law to be withheld with
         respect to any shares issued upon exercise of options under the
         Plan.  Subject to the prior approval of the Company, which may be
         withheld by the Company in its sole discretion, the optionee may
         elect to satisfy such obligations, in whole or in part, (i) by
         causing the Company to withhold shares of Common Stock otherwise
         issuable pursuant to the exercise of an option or (ii) by
         delivering to the Company shares of Common Stock already owned by
         the optionee.  The shares so delivered or withheld shall have a



                                        -9-
<PAGE>   32


         fair market value equal to such withholding obligation.  The fair
         market value of the shares used to satisfy such withholding
         obligation shall be determined by the Company as of the date that
         the amount of tax to be withheld is to be determined.  An optionee
         who has made an election pursuant to this Section 19(a) may only
         satisfy his or her withholding obligation with shares of Common
         Stock which are not subject to any repurchase, forfeiture,
         unfulfilled vesting or other similar requirements.  

              (b)  Notwithstanding the foregoing, in the case of a
         Reporting Person, no election to use shares for the payment of
         withholding taxes shall be effective unless made in compliance
         with any applicable requirements of Rule 16b-3.

         20.  Cancellation and New Grant of Options, Etc.
              ------------------------------------------

              The Board of Directors shall have the authority to effect, at
         any time and from time to time, with the consent of the affected
         optionees, (i) the cancellation of any or all outstanding options
         under the Plan and the grant in substitution therefor of new
         options under the Plan covering the same or different numbers of
         shares of Common Stock and having an option exercise price per
         share which may be lower or higher than the exercise price per
         share of the cancelled options or (ii) the amendment of the terms
         of any and all outstanding options under the Plan to provide an
         option exercise price per share which is higher or lower than the
         then-current exercise price per share of such outstanding options. 

         21.  Effective Date and Duration of the Plan.
              ---------------------------------------

              (a)  EFFECTIVE DATE.  The Plan shall become effective when
         adopted by the Board of Directors, but no Incentive Stock Option
         granted under the Plan shall become exercisable unless and until
         the Plan shall have been approved by the Company's shareholders.
         If such shareholder approval is not obtained within twelve months
         after the date of the Board's adoption of the Plan, no options
         previously granted under the Plan shall be deemed to be Incentive
         Stock Options and no Incentive Stock Options shall be granted
         thereafter.  Amendments to the Plan not requiring shareholder
         approval shall become effective when adopted by the Board of
         Directors; amendments requiring shareholder approval (as provided
         in Section 19) shall become effective when adopted by the Board of
         Directors, but no Incentive Stock Option granted after the date of
         such amendment shall become exercisable (to the extent that such
         amendment to the Plan was required to enable the Company to grant
         such Incentive Stock Option to a particular optionee) unless and
         until such amendment shall have been approved by the Company's
         shareholders.  If such shareholder approval is not obtained within
         twelve months of the Board's adoption of such amendment, any
         Incentive Stock Options granted on or after the date of such



                                       -10-
<PAGE>   33

         amendment shall terminate to the extent that such amendment to the
         Plan was required to enable the Company to grant such option to a
         particular optionee.  Subject to this limitation, options may be
         granted under the Plan at any time after the effective date and
         before the date fixed for termination of the Plan.

              (b)  TERMINATION.  Unless sooner terminated in accordance
         with Section 15, the Plan shall terminate, with respect to
         Incentive Stock Options, upon the earlier of (i) the close of
         business on the day next preceding the tenth anniversary of the
         date of its adoption by the Board of Directors, or (ii) the date
         on which all shares available for issuance under the Plan shall
         have been issued pursuant to the exercise or cancellation of
         options granted under the Plan.  Unless sooner terminated in
         accordance with Section 15, the Plan shall terminate with respect
         to options which are not Incentive Stock Options on the date
         specified in (ii) above.  If the date of termination is determined
         under (i) above, then options outstanding on such date shall
         continue to have force and effect in accordance with the
         provisions of the instruments evidencing such options.

         22.  Provision for Foreign Participants.
              ----------------------------------

              The Board of Directors may, without amending the Plan, modify
         awards or options granted to participants who are foreign
         nationals or employed outside the United States to recognize
         differences in laws, rules, regulations or customs of such foreign
         jurisdictions with respect to tax, securities, currency, employee
         benefit or other matters.

         23.  Special Merger Provisions.  
              -------------------------

              (a)  PRIORITY.  The provisions of this Section 23 shall
         govern any and all options under this Plan (referred to in this
         Section 23 as "Plan Options") which have been granted prior to, or
         are granted following, the effective date of the merger of the
         Company with and into AHP Merger Subsidiary Corporation (the
         "Merger") pursuant to that certain Agreement and Plan of Merger
         ("Merger Agreement") dated September 19, 1991 among the Company,
         American Home Products Corporation ("AHP"), AHP Biotech
         Holdings, Inc. ("Holdings") and AHP Merger Subsidiary Corporation.
         To the extent there is a conflict between any of the provisions of
         this Section 23 and any other provision of the Plan, the specific
         provisions of this Section 23 shall be controlling and shall
         govern the disposition of all Plan Options outstanding at the time
         of the Merger.  Unless defined elsewhere in the Plan, capitalized
         terms used in this Section 23 shall have the meaning ascribed to
         them in the Merger Agreement.





                                       -11-
<PAGE>   34


              (b)  Option Adjustments
                   ------------------

                   (i)  The exercisability of any installment of Plan
              Options granted prior to the Effective Time of the Merger
              shall not be accelerated in whole or in part as a result of
              the Merger.  

                  (ii)  None of the Plan Options granted prior to the
              Effective Time of the Merger shall be entitled to a Cash-Out
              Election pursuant to the Merger Agreement.  

                 (iii)  Each Plan Option granted prior to the Effective
              Time of the Merger shall remain in effect after the Merger
              upon the same terms and conditions (including, without
              limitation, the exercise price per share and the number of
              shares) in effect for such Plan Option immediately prior to
              the Merger, except that the shares purchasable under each
              such continuing Plan Option shall be for Common Stock subject
              to the AHP Option as represented by Depositary Shares
              (evidenced by Depositary Receipts issued in accordance with
              the terms of the Depositary Agreement).  Each such continuing
              Plan Option will become exercisable, and the Depositary
              Shares purchasable thereunder shall vest, in accordance with
              the same installment dates such Plan Option would have become
              exercisable, and such shares would have vested, under the
              vesting schedule specified for that Plan Option at the time
              of grant.  

              (c)  Plan Adjustments
                   ----------------

                   (i)  After the Effective Time of the Merger, all
              references in the Plan to Common Stock shall (pursuant to
              this Section 23 and the Merger Agreement) automatically
              become references to Common Stock subject to the AHP Option
              as represented by Depositary Shares (evidenced by Depositary
              Receipts issued in accordance with the terms of the
              Depositary Agreement).

                  (ii)  If Holdings exercises the AHP Option, then all
              outstanding Plan Options granted hereunder shall
              automatically accelerate and become fully exercisable and
              vested immediately prior to the date fixed for purchase of
              the outstanding shares pursuant to the AHP Option, and upon
              such purchase the holder of such Plan Option shall promptly
              be paid for each such Plan Option an amount equal to the
              product of (i) the excess of the applicable AHP Option
              exercise price per share fixed in the Merger Agreement over
              the exercise price per share, times (ii) the number of
              Depositary Shares covered by such Plan Option.  Such Plan
              Option shall terminate upon such payment.



                                       -12-
<PAGE>   35

                 (iii)  Upon the expiration of the AHP Option, all
              references in the Plan to Common Stock subject to the AHP
              Option as represented by Depositary Shares (evidenced by
              Depositary Receipts issued in accordance with the terms of
              the Depositary Agreement) (as provided in Subsection
              24(c)(i)) shall automatically revert to references to Common
              Stock.  Each Plan Option granted under this Plan prior to
              such expiration shall remain in effect after such expiration
              upon the same terms and conditions (including, without
              limitation, the exercise price per share and the number of
              shares) in effect for such Plan Option immediately prior to
              such expiration, except that the shares purchasable under
              each such continuing Plan Option shall be shares of Common
              Stock.  Each such continuing Plan Option will become
              exercisable, and the shares purchasable thereunder shall
              vest, in accordance with the same installment dates such Plan
              Option would have become exercisable, and such shares would
              have vested, under the vesting schedule specified for that
              Plan Option at the time of grant.  


                                       Adopted by the Board of Directors on
                                       September 19, 1991.











                                       -13-
<PAGE>   36


                              GENETICS INSTITUTE, INC.

                      First Amendment to 1991 Stock Option Plan
                      -----------------------------------------


              The 1991 Stock Option Plan (the "Plan") of Genetics

         Institute, Inc. (the "Company"), pursuant to Section 18 thereof,

         is hereby amended as follows:

              Section 4 of the Plan is amended to increase the number of

         shares of Genetics Institute, Inc. Common Stock, $.01 par value,

         subject to the Plan, so that as amended (and taking into account

         all stock splits and stock dividends distributed through

         January 14, 1993), the first sentence of said Section 4 shall read

         as follows:

                   "Subject to adjustment as provided in Section 14 below,
              the maximum number of shares of Common Stock of the Company
              which may be issued and sold under the Plan is 4,400,000
              shares."

              The foregoing amendment shall take effect upon the date

         approved by the Board of Directors, subject to ratification and

         approval by the stockholders of Genetic Institute, Inc.  Except as

         so amended, the Plan shall remain in full force and effect.



                                       Adopted by the Board of Directors
                                       January 14, 1993

                                       Approved by the Stockholders
                                       April 13, 1993
<PAGE>   37


                              GENETICS INSTITUTE, INC.

                     Second Amendment to 1991 Stock Option Plan
                     ------------------------------------------


              The 1991 Stock Option Plan (the "Plan") of Genetics

         Institute, Inc. (the "Company"), pursuant to Section 18 thereof,

         is hereby amended as follows:

              Section 4 of the Plan is amended to increase the number of

         shares of Genetics Institute, Inc. Common Stock, $.01 par value,

         subject to the Plan, so that as amended (and taking into account

         all stock splits and stock dividends distributed through March 6,

         1995), the first sentence of said Section 4 shall read as follows:

                   "Subject to adjustment as provided in Section 14 below,
              the maximum number of shares of Common Stock of the Company
              which may be issued and sold under the Plan is 5,700,000
              shares."

              The foregoing amendment shall take effect upon the date

         approved by the Board of Directors, subject to ratification and

         approval by the stockholders of Genetic Institute, Inc.  Except as

         so amended, the Plan shall remain in full force and effect.



                                       Adopted by the Board of Directors on
                                       March 24, 1995.

<PAGE>   38

PROXY                       GENETICS INSTITUTE, INC.                      PROXY

                ANNUAL MEETING OF STOCKHOLDERS - MAY 16, 1995

         THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
                                OF THE COMPANY


    The undersigned, having received notice of the meeting and the proxy
statement therefor, and revoking all prior proxies, hereby appoint(s) Gabriel
Schmergel, Patrick Gage, Garen G. Bohlin and Tuan Ha-Ngoc and each of them,
attorneys or attorney of the undersigned (with full power of substitution in
them and each of them) for and in the name(s) of the undersigned to attend the
Annual Meeting of Stockholders of Genetics Institute, Inc. (the "Company") to
be held at The Charles Hotel, One Bennett Street, Cambridge, Massachusetts at
9:00 a.m. (local time), on Tuesday, May 16, 1995 and any adjourned sessions
therof, and there to vote and act upon the following matters in respect of
shares of Common Stock of the Company which the undersigned will be entitled to
vote or act upon, with all powers the undersigned would possess if personally
present.

    IN THEIR DISCRETION, THE PROXIES ARE AUTHORIZED TO VOTE UPON SUCH OTHER
MATTERS AS MAY PROPERLY COME BEFORE THE MEETING, OR ANY ADJOURNMENT THEREOF.

1.  Election of Class II directors.

    Nominees:  Anthony B. Evnin, Robert I. Levy, M.D. and 
               Thomas P. Maniatis, Ph.D.

        Pursuant to Section 3.06 of the Governance Agreement among the Company,
    American Home Products Corporation and AHP Biotech Holdings, Inc., dated as
    of January 16, 1992, the undersigned hereby directs the proxies to vote
    its shares of Common Stock for Anthony B. Evnin, Robert I. Levy, M.D. and
    Thomas P. Maniatis, Ph.D. in proportion to the votes cast by the holders of
    the Company's Depositary Shares (other than the undersigned and its
    affiliates).

2.  To approve an amendment to the Company's 1991 Stock Option Plan to increase
    the aggregate number of the Company's Depositary Shares covered by such Plan
    from 4,400,000 to 5,700,000.

    / / FOR                      / / AGAINST                       / / ABSTAIN
 

3.  Ratification of the selection of Arthur Andersen LLP.

    / / FOR                      / / AGAINST                       / / ABSTAIN

4.  To transact such other business as may properly come before the meeting or
    any adjournment thereof.

    / / FOR                      / / AGAINST                       / / ABSTAIN


    THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED AS DIRECTED BY THE
UNDERSIGNED.  IF NO DIRECTION IS GIVEN WITH RESPECT TO ANY ELECTION TO OFFICE
OR PROPOSAL SPECIFIED ABOVE, THIS PROXY WILL BE VOTED FOR SUCH ELECTION TO
OFFICE OR PROPOSAL.


    Attendance of the undersigned at the meeting or at any adjourned session 
thereof will not be deemed to revoke this proxy unless the undersigned shall 
affirmatively indicate thereat the intention of the undersigned to vote said 
shares in person.  If the undersigned hold(s) any of the shares of the Company 
in a fiduciary, custodial or joint capacity or capacities, this proxy is signed 
by the undersigned in every such capacity as well as individually.


Number of Shares Represented             AHP BIOTECH HOLDINGS, INC.
by this Proxy

____________________________             

Dated: _______________, 1995             By: ________________________

                                         ____________________________
                                                  Signature(s)


                                         Please sign name(s) exactly as
                                         appearing hereon.  When signing as
                                         attorney, executor, administrator 
                                         or other fiduciary, please give your 
                                         full title as such.  Joint owners 
                                         should each sign personally.



                                     -1-
<PAGE>   39

                           VOTING INSTRUCTION CARD
                           -----------------------           

                           GENETICS INSTITUTE, INC.

                ANNUAL MEETING OF STOCKHOLDERS - MAY 16, 1995

           THESE VOTING INSTRUCTIONS ARE SOLICITED ON BEHALF OF THE
                      BOARD OF DIRECTORS OF THE COMPANY

        The undersigned, having received notice of the meeting and the proxy
statement therefor, and revoking all prior voting instructions, hereby
direct(s) The First National Bank of Boston, as Depositary (the "Depositary"),
to vote and act upon the following matters in accordance with the instructions
indicated on the reverse side in respect of all shares of Common Stock of
Genetics Institute, Inc. (the "Company") represented by Depositary Shares held
by the undersigned.  In addition, the undersigned authorize(s) the Depositary
to appoint Gabriel Schmergel, Patrick Gage, Garen G. Bohlin and Tuan Ha-Ngoc and
each of them, attorneys or attorney of the Depositary (with full power of
substitution in them and each of them) for and in the name of the Depositary to
attend the Annual Meeting of Stockholders of the Company to be held at The
Charles Hotel, One Bennett Street, Cambridge, Massachusetts at 9:00 a.m. (local
time), on Tuesday, May 16, 1995 and any adjourned sessions thereof, and there
to vote and act upon the following matters in respect of all shares of Common
Stock of the Company which the Depositary will be entitled to vote or act upon,
with all powers the Depositary would possess if personally present, including
the power to vote upon such other matters as may properly come before the
meeting, or any adjournment therof.

                                                                     -----------
                  CONTINUED AND TO BE SIGNED ON REVERSE SIDE         SEE REVERSE
                                                                         SIDE
                                                                     -----------
<PAGE>   40
/X/ Please mark
    votes as in
    this example

The shares represented by this voting instruction card will be voted by
the Depositary as directed by the undersigned.  If no direction is given with
respect to any election to office or proposal specified below, the undersigned
specifically instructs the Depositary to vote in favor of such election to
office or proposal.

<TABLE>
<S>                                                     <C>                                   

1.  Election of Class II directors (for all nominees    2.  Approval of an amendment to the   
    except as marked below:                                 Company's 1991 Stock Option           
                                                            Plan to increase the aggregate       
    Nominees:  Anthony B. Evnin, Robert I. Levy, M.D.       number of the Company's           
               and Thomas P. Maniatis, Ph.D.                Depositary Shares covered by
                                                            such Plan from 4,400,000 to
               FOR                    WITHHELD              5,700,000.                        
             /    /                   /   /                 
                                                              FOR      AGAINST     ABSTAIN
    ________________________________________                 /   /      /   /       /   /     
    For all nominees except as noted above                                       
                                                        3.  Ratification of the selection
                                                            of Arthur Anderson LLP.
    MARK HERE IF YOU PLAN   /   /
    TO ATTEND THE MEETING                                     FOR      AGAINST     ABSTAIN
                                                             /   /      /   /       /   /
     
    MARK HERE FOR ADDRESS   /   /                       4.  To transact such other business
    CHANGE AND NOTE BELOW                                   as may properly come before the
                                                            meeting or any adjournment
                                                            thereof.
Please sign name(s) exactly as appearing herein.            
When signing as attorney, executor, administrator             FOR      AGAINST     ABSTAIN
or other fiduciary, please give your full title              /   /      /    /      /    /
as such.  Joint owners should each sign personally.     
                                                        Attendance of the undersigned at the
                                                        meeting or at any adjourned session
                                                        thereof will not be deemed to revoke
                                                        these voting instructions.  The voting
                                                        instructions may only be revoked by
                                                        delivery of a written revocation to 
                                                        the Depositary prior to the Depositary's
                                                        exercise of these voting instructions.
                                                        If the undersigned hold(s) any of the
                                                        Depositary Shares of the Company in a
                                                        fiduciary, custodial or joint
                                                        capacity or capacities, this voting
                                                        instruction card is signed by the 
                                                        undersigned in every such capacity
                                                        as well as individually.

                                                        Sigature                              Date
                                                        --------                              ----
                                                        Sigature                              Date
                                                        --------                              ----

</TABLE>



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