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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
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                                 SCHEDULE 14D-9
 
                     SOLICITATION/RECOMMENDATION STATEMENT
                      PURSUANT TO SECTION 14(D)(4) OF THE
                        SECURITIES EXCHANGE ACT OF 1934
                            ------------------------
 
                              CORVITA CORPORATION
 
                           (Name of Subject Company)
 
                              CORVITA CORPORATION
 
                      (Name of Person(s) Filing Statement)
 
                    COMMON STOCK, PAR VALUE $0.001 PER SHARE
                         (Title of Class of Securities)
 
                                  221 010 101
 
                     (CUSIP Number of Class of Securities)
 
                            NORMAN R. WELDON, PH.D.
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                              CORVITA CORPORATION
                             8210 N.W. 27TH STREET
                              MIAMI, FLORIDA 33122
                                 (305) 599-3100
 
      (Name, address and telephone number of person authorized to receive
     notice and communication on behalf of the person(s) filing statement).
 
                                WITH A COPY TO:
 
                           LOWELL S. LIFSCHULTZ, ESQ.
                          EPSTEIN BECKER & GREEN, P.C.
                                250 PARK AVENUE
                               NEW YORK, NY 10177
                                 (212) 351-4500
 
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ITEM 1.  SECURITY AND SUBJECT COMPANY.
 
    The   name  of  the  subject  company  is  Corvita  Corporation,  a  Florida
corporation (the "Company"), and the address of the principal executive  offices
of  the Company is 8210 N.W. 27th Street, Miami, Florida 33122. The title of the
class of equity securities to which this statement relates is the common  stock,
par value $0.001 per share (the "Common Stock" or the "Shares"), of the Company.
 
ITEM 2.  TENDER OFFER OF THE BIDDER.
 
    The  statement  relates to  the  tender offer  by  HPG Acquisition  Corp., a
Florida corporation (the "Merger Sub"), disclosed in a Tender Offer Statement on
Schedule 14D-1, dated  Apri 17,  1996 (the  "Schedule 14D-1"),  to purchase  all
outstanding  Shares, at a price of $10.25 per  Share, net to the seller in cash,
upon the terms and subject to the conditions set forth in the Offer to Purchase,
dated Apri  17,  1996 (the  "Offer  to Purchase"),  and  the related  Letter  of
Transmittal (which together with the Offer to Purchase constitute the "Offer").
 
    The  Offer is being made pursuant to  an Agreement and Plan of Merger, dated
April  11,  1996  (the  "Merger  Agreement"),  among  Pfizer  Inc.,  a  Delaware
corporation (the "Parent"), Merger Sub, a wholly owned subsidiary of the Parent,
and the Company. The Merger Agreement provides, among other things, that as soon
as  practicable after the satisfaction or waiver  of the conditions set forth in
the Merger Agreement, the Merger  Sub will be merged  with and into the  Company
(the  "Merger"), and the Company will continue as the surviving corporation (the
"Surviving Corporation"). A copy  of the Merger Agreement  is filed herewith  as
Exhibit 1 and is incorporated herein by reference.
 
    As  set  forth in  the Schedule  14D-1, the  principal executive  offices of
Parent and the Merger  Sub are located  at 235 East 42nd  Street, New York,  New
York 10017.
 
ITEM 3.  IDENTITY AND BACKGROUND.
 
    (a)  The name and  address of the  Company, which is  the person filing this
statement, are set forth in Item 1 above.
 
    (b) Each  material contract,  agreement, arrangement  and understanding  and
actual  or potential conflict of interest  between the Company or its affiliates
and: (i) the Company,  its executive officers, directors  or affiliates or  (ii)
the Parent, its executive officers, directors or affiliates, is described in the
attached  Schedule I (which information is  incorporated herein by reference) or
is set forth below at Item 9.
 
STOCK OPTIONS
 
    The Company  maintains the  1995 Stock  Option Plan,  the 1995  Non-Employee
Director  Stock Option Plan,  and the 1988 Stock  Option Plan (collectively, the
"Plans"), pursuant to  which options  (the "Options") to  purchase Common  Stock
have  been granted and remain outstanding as of the date of this Schedule 14D-9.
Pursuant to the Merger Agreement, immediately after the Merger Sub has  accepted
for  payment, purchased and  paid for all  of the Shares  that have been validly
tendered and not withdrawn pursuant to  the Offer prior to its expiration  date,
as it may be extended in accordance with the terms of the Offer (the "Acceptance
Date"),  the Company will pay each holder  of a then outstanding Option, whether
or not then  exercisable, upon surrender  and in settlement  thereof, an  amount
(subject  to any applicable withholding tax) in cash equal to the product of (A)
the excess, if any, of $10.25 over  the exercise price per Share of such  Option
and  (B) the  number of  Shares purchasable upon  exercise of  such Option. Upon
surrender of an Option and the receipt  by its holder of the requisite  amounts,
the  Option  will  be  cancelled.  As  of  April  4,  1996,  there  were Options
outstanding to purchase 808,636 Shares with  a per share exercise price of  less
than $10.25, and the holders of such Options, in the aggregate, will be entitled
to  receive approximately $5.07 million pursuant  to the foregoing provisions of
the Merger Agreement. The  Parent has agreed to  cause sufficient funds to  make
such payments to be provided to the Company.
 
WARRANTS
 
    From time to time, the Company has issued warrants to purchase Common Stock,
and  warrants to purchase Common Stock (the "Warrants") remain outstanding as of
the date of this Schedule
 
                                       1

14D-9. Pursuant to the Merger Agreement, immediately after the Acceptance  Date,
the  Parent will pay each holder of  a Warrant, upon surrender and in settlement
thereof, an amount (subject to any applicable withholding tax) in cash equal  to
the excess, if any, of $10.25 over the per Share exercise price of each Warrant.
Upon  surrender of a warrant and receipt  by its holder of the requisite amount,
the Warrant  will  be  cancelled. As  of  April  4, 1996,  there  were  Warrants
outstanding  to purchase 491,699 Shares with a  per share exercise price of less
than $10.25,  and  the holders  of  such Warrants,  in  the aggregate,  will  be
entitled  to  receive  approximately  $1.59 million  pursuant  to  the foregoing
provisions of the Merger  Agreement. The Parent has  agreed to cause  sufficient
funds to make such payments to be provided to the Company.
 
THE MERGER AGREEMENT
 
    The  summary of  the Merger  Agreement contained  in the  Offer to Purchase,
which  has  been  filed  with  the  Securities  and  Exchange  Commission   (the
"Commission")  as an exhibit to the Schedule  14D-1, a copy of which is enclosed
with this  Schedule 14D-9,  is incorporated  herein by  reference. Such  summary
should  be read in its entirety for a more complete description of the terms and
provisions of the  Merger Agreement.  A copy of  the Merger  Agreement has  been
filed as Exhibit 1 hereto and is incorporated herein by reference. The following
is  a  summary of  certain  portions of  the  Merger Agreement  which  relate to
arrangements among the  Company, the Merger  Sub, the Parent  and the  Company's
executive officers and directors and certain other significant provisions.
 
    BOARD  COMPOSITION.  The Merger Agreement  provides that, effective upon the
purchase by the Parent or Merger Sub of such number of Shares which represents a
majority of the outstanding Shares on a fully diluted basis, the Parent shall be
entitled to designate  the number  of directors, rounded  up to  the next  whole
number,  on the Company's Board of Directors  that equals the product of (i) the
total number of directors on the Company's Board of Directors (giving effect  to
the  election of any  additional directors pursuant to  this provision) and (ii)
the percentage (expressed as a decimal)  that the number of Shares  beneficially
owned by Parent bears to the total number of Shares outstanding; and the Company
shall, subject to the provisions of Section 14(f) of the Securities Exchange Act
of  1934, as amended (the "Exchange Act") and Rule 14f-1 under the Exchange Act,
promptly use all reasonable efforts necessary to cause the Parent's designees to
be elected or appointed to the Board of Directors of the Company. From and after
the time, if any, that Parent's designees constitute a majority of the Company's
Board of Directors (the "Control Date"), any termination of the Merger Agreement
by the Company, any  amendment of the Merger  Agreement requiring action by  the
Board  of Directors of the Company, any extension of time for performance of any
of the  obligations of  the  Parent or  the Sub  thereunder  and any  waiver  of
compliance  with any provision  of the Merger  Agreement for the  benefit of the
Company shall require the approval of a majority of the directors of the Company
then in office who are not affiliates  of Parent and who were not designated  by
Parent (the "Company Designees"), which action shall be deemed to constitute the
action  of the  full Board  of Directors  even if  such majority  of the Company
Designees does  not constitute  a  majority of  all  directors then  in  office;
provided  that, if there are no Company  Designees, such actions may be effected
by majority vote of the entire Board of Directors but no such action shall amend
the terms of the Merger Agreement in a manner adverse to the shareholders of the
Company. All  of the  current  directors of  the  Company have  indicated  their
intention to resign as directors on the Control Date.
 
    Section  14(f)  of the  Exchange Act  requires  the Company  to mail  to its
stockholders an  Information Statement  containing the  information required  by
Section  14(f) of the Exchange Act and Rule 14f-1 promulgated thereunder. A copy
of  the  Information  Statement  is  attached  as  Schedule  I  hereto  and   is
incorporated herein by reference.
 
    DIRECTOR  AND OFFICER INDEMNIFICATION AND INSURANCE.  Pursuant to the Merger
Agreement, the Parent and the Surviving Corporation have agreed that all  rights
to  indemnification now existing in favor of the directors, officers, employees,
fiduciaries and agents of the Company  as provided in articles of  incorporation
or  by-laws of the Company or  otherwise in effect as of  the date of the Merger
Agreement will survive  the Merger and  will continue in  full force and  effect
until  six years from such time as  the Merger becomes effective (the "Effective
Time") except that the Parent and the Surviving
 
                                       2

Corporation will  not be  obligated to  continue any  policy of  directors'  and
officers'  liability insurance.  The Parent  and the  Surviving Corporation have
agreed that the Surviving Corporation  will indemnify, defend and hold  harmless
each  present and former director and  officer, employee, fiduciary and agent of
the Company ("Indemnified Parties") to  the fullest extent possible against  any
threatened  or  actual claim,  action,  suit, proceeding  or  investigation made
against them from their  service in such capacities  (including service in  such
capacities  for another  enterprise at  the Company's  request) occurring  on or
prior to the Effective Time for at least six years from the Effective Time.  The
Parent  has agreed  that, should the  Surviving Corporation fail  to perform the
foregoing obligations, the Parent shall assume and perform those obligations.
 
    NO SOLICITATION OF OFFERS.  The Company has agreed that from the date of the
Merger Agreement until the earlier of the Control Date or the termination of the
Merger Agreement, it will not,  and will not permit  any of its subsidiaries  or
any  of its or their officers,  directors, employees, representatives, agents or
affiliates, to, directly or indirectly, initiate, solicit or knowingly encourage
(including by way of  furnishing non-public information  or assistance) or  take
any  other action knowingly  to facilitate, any  inquiries or the  making of any
proposal that  constitutes,  or  may  reasonably  be  expected  to  lead  to  an
Acquisition  Proposal (as defined below), or  enter into or maintain or continue
discussions or  negotiate with  any  person or  entity  in furtherance  of  such
inquiries  or  to obtain  an Acquisition  Proposal  or agree  to or  endorse any
Acquisition Proposal,  or authorize  or permit  any of  its or  their  officers,
directors  or employees  or any  of its  subsidiaries or  any investment banker,
financial advisor, attorney, accountant or  other representative retained by  it
or  by any of its subsidiaries to  take any such action; PROVIDED, HOWEVER, that
nothing in the Merger Agreement prohibits the Board of Directors of the  Company
from  furnishing  information to,  or entering  into, maintaining  or continuing
discussions or negotiations with, any person or entity that makes an unsolicited
Acquisition Proposal after  the date of  the Merger Agreement,  if the Board  of
Directors  of the Company, after consultation with  and based upon the advice of
independent  legal  counsel  (who  may   be  the  Company's  regularly   engaged
independent  legal counsel), determines  in good faith that  the failure to take
such action could create a  reasonable possibility of a  breach by the Board  of
Directors  of  the  Company  of  its  fiduciary  duties  to  shareholders  under
applicable law  and  prior to  taking  such  action, the  Company  (i)  provides
reasonable  notice to the Parent to the effect that it is taking such action and
(ii) receives from such person  or entity an executed confidentiality  agreement
in  reasonably customary form. The Company  has agreed to use reasonable efforts
to keep the Parent informed of the status of any such Acquisition Proposal.  For
purposes of the Merger Agreement, "Acquisition Proposal" means an inquiry, offer
or  proposal  regarding  any  of  the  following  (other  than  the transactions
contemplated by the Merger  Agreement with the Parent  or Merger Sub)  involving
the  Company or  any of its  subsidiaries: (w) any  merger, consolidation, share
exchange, recapitalization, business combination  or other similar  transaction;
(x)  any sale, lease, exchange, mortgage,  pledge, transfer or other disposition
of all or  substantially all  the assets of  the Company  and its  subsidiaries,
taken as a whole, in a single transaction or series of related transactions; (y)
any  tender offer or  exchange offer for  20 percent or  more of the outstanding
shares of capital stock of the Company or the filing of a registration statement
under the Securities  Act of  1933 in connection  therewith; or  (z) any  public
announcement  or a proposal, plan or intention to do any of the foregoing or any
agreement to engage in any of the foregoing.
 
    Prior to  the Acceptance  Date, if  the Board  of Directors  of the  Company
determines  in good faith, after consultation with  and based upon the advice of
independent legal counsel, that the failure  to take such action could create  a
reasonable possibility of breach by the Board of Directors of the Company of its
fiduciary  duties to the Company's shareholders  under applicable law, the Board
of  Directors  of  the   Company  may  withdraw  or   modify  its  approval   or
recommendation  of the  Offer, the Merger  Agreement and the  Merger, approve or
recommend an Acquisition Proposal that is more favorable to the shareholders  of
the  Company than  the Offer  and Merger  (a "Superior  Proposal") or  cause the
Company to enter  into an  agreement with respect  to a  Superior Proposal.  The
Company  shall provide  reasonable notice  to the  Parent or  Merger Sub  to the
effect that it is taking such action. If the
 
                                       3

Company proposes  to  enter into  an  agreement  with respect  to  any  Superior
Proposal,  it shall concurrently with proposing  such an agreement pay, or cause
to be paid, the termination fee described in the next succeeding paragraph.
 
    TERMINATION FEE.    The Company  has  agreed to  pay  the Parent  a  fee  in
immediately  available funds  equal to  $4,000,000 upon  the termination  of the
Merger Agreement (i) by  the Parent, if  the Board of  Directors of the  Company
shall  have withdrawn, modified or amended its recommendation or approval of the
Merger Agreement or the transactions contemplated thereby in a manner adverse to
the Parent, the  Board of  Directors of the  Company shall  have recommended  an
Acquisition  Proposal  or  the Board  of  Directors  of the  Company  shall have
resolved to do any of the foregoing, (ii) by the Company to allow the Company to
enter into an  agreement in  respect of  a Superior  Proposal, or  (iii) by  the
Parent  as a result of an intentional material breach of the Merger Agreement by
the Company following (but not prior to) the Company's receipt of an Acquisition
Proposal by any person or group other than Parent.
 
SHAREHOLDERS AGREEMENT
 
    The following is a summary of the Shareholders Agreement, dated as of  April
11,  1996 (the "Shareholders Agreement"), among  the Parent, the Merger Sub, and
Norman R.  Weldon, Ph.D.,  David  C. MacGregor,  M.D., Leonard  Pinchuk,  Ph.D.,
WestMed  Venture  Partners, L.P.,  Trinity Ventures  II,  L.P., Bruce  A. Weber,
Herbert Kontges,  Ph.D.,  John  B.  Martin,  and  Karen  C.  Vinjamuri  (each  a
"Shareholder" and collectively the "Shareholders"). Such summary is qualified in
its  entirety by reference to the text  of the Shareholders Agreement, a copy of
which, together with Schedule  1 thereto, is  filed as Exhibit  2 hereto and  is
incorporated herein by reference.
 
    TENDER  OF SHARES.  Pursuant to the Shareholders Agreement, each Shareholder
has agreed to validly  tender (and not withdraw)  pursuant to and in  accordance
with  the Offer, not later than the fifth business day after commencement of the
Offer, the number of shares  of Common Stock of  the Company set forth  opposite
that  Shareholder's  name  on  Schedule 1  to  the  Shareholders  Agreement (the
"Existing Shares"), plus any Shares acquired  by the Shareholder after the  date
of the Shareholders Agreement and prior to its termination. The Existing Shares,
in  the aggregate, constitute  1,487,291 Shares, or  approximately 20.93% of the
outstanding Shares. The covenants and  agreements contained in the  Shareholders
Agreement  with respect  to tender of  the Shareholders'  Shares shall terminate
upon the earlier of (a) the Effective Time and (b) the first anniversary of  the
date   of  the  Shareholders  Agreement,   provided  that  restrictions  in  the
Shareholders Agreement  on  solicitation of  or  response to  inquiries  or  any
Acquisition   Proposal,  and  restrictions  in  the  Shareholders  Agreement  on
specified  transactions  of  transfer,  encumbrance,  or  other  disposition  of
Shareholders'  Shares or  interests (including  voting rights)  in Shareholders'
Shares, shall terminate upon any earlier termination of the Merger Agreement.
 
    VOTING OF  SHARES.   Each Shareholder  has  agreed that  at any  meeting  of
shareholders  of  the  Company or  in  connection  with any  written  consent of
shareholders of the Company,  that such Shareholder shall  vote (or cause to  be
voted)  all  the  Shares  beneficially  owned  by  that  Shareholder  as  of the
applicable record date (other than Shares that are not outstanding) (a) in favor
of the Merger, the execution and delivery by the Company of the Merger Agreement
and the approval of the terms of the Merger Agreement; (b) against any action or
agreement that would result in  a breach of any  agreement of the Company  under
the   Merger  Agreement;  and   (c)  against  transactions   enumerated  in  the
Shareholders Agreement  and  any  other  action involving  the  Company  or  its
subsidiaries  that is intended or that could reasonably be expected to interfere
with, delay  or  otherwise adversely  affect  the Merger  and  the  transactions
contemplated  by the Merger Agreement. The covenants and agreements contained in
the Shareholders  Agreement with  respect  to the  voting of  the  Shareholders'
Shares  shall terminate upon the earlier of  (i) the Effective Time and (ii) the
first anniversary  of the  date  of the  Shareholders Agreement,  provided  that
restrictions  in the  Shareholders Agreement on  solicitation of  or response to
inquiries or  any Acquisition  Proposal, and  restrictions in  the  Shareholders
Agreement on specified transactions concerning the voting of or voting rights in
Shareholders' Shares, shall terminate upon any earlier termination of the Merger
Agreement.
 
                                       4

    DISPOSITION  OF ACQUIRED SHAREHOLDERS' SHARES.   Each Shareholder has agreed
that (a) if the Merger Agreement is  terminated (1) by the Parent, if the  Board
of  Directors  of the  Company  shall have  withdrawn,  modified or  amended its
recommendation  or  approval  of  the  Merger  Agreement  or  the   transactions
contemplated  thereby in a manner adverse to  the Parent, the Board of Directors
of the Company shall  have recommended an Acquisition  Proposal or the Board  of
Directors  of the Company shall have resolved to do any of the foregoing, (2) by
the Company to  allow the Company  to enter into  an agreement in  respect of  a
Superior  Proposal, or (3) by the Parent  as a result of an intentional material
breach of the Merger Agreement by the  Company following (but not prior to)  the
Company's  receipt of an Acquisition Proposal by  any person or group other than
Parent, and (b) during the period commencing on the date of such termination and
continuing until the first anniversary of the date of the Shareholders Agreement
such Shareholder's Shares are disposed of, transferred or sold to a person other
than Parent or Merger  Sub in a  transaction resulting in  a direct or  indirect
change  in the ownership of a  majority of the Common Stock  or in a majority of
the individuals who constitute the Board of Directors of the Company on the date
of the Shareholders Agreement (a  "Sale") and (c) the  per share price for  such
Sale  exceeds the Offer price,  then such Shareholder must  pay to the Parent an
amount per share in cash  equal to 50% of the  difference between the gross  per
share price for such Sale received or receivable by such Shareholder and the per
share  Offer price. Any such  payment required to be made  to the Parent must be
made within three days  of the Shareholder's receipt  of the Sale proceeds.  Any
such  Sale  must be  made  in an  arm's length,  bona  fide transaction  with an
unaffiliated person.
 
    NO SOLICITATION.  Each  Shareholder has agreed  that such Shareholder  shall
not,  in that Shareholder's capacity as  such, directly or indirectly, initiate,
solicit (including by way of furnishing information) or respond to any inquiries
of the making of any proposal  that constitutes an Acquisition Proposal,  except
that  a Shareholder  who is a  director of the  Company may take  actions in the
Shareholder's capacity  as a  director to  the extent  permitted by  the  Merger
Agreement.  If any  Shareholder receives any  inquiry or  proposal regarding any
Acquisition Proposal, that Shareholder shall promptly inform the Parent of  that
inquiry  or proposal. Each Shareholder must cease and cause to be terminated any
activities, discussions or negotiations with any parties commenced prior to  the
date  of  the Shareholders  Agreement  with respect  to  such a  solicitation or
response.
 
    RESTRICTIONS ON TRANSFER, ETC.   Except in connection with the  transactions
contemplated  in the Shareholders Agreement,  no Shareholder shall, (a) directly
or indirectly offer for sale,  sell, transfer, tender, pledge, encumber,  assign
or otherwise dispose of, or enter into any contract, option or other arrangement
or  understanding  with respect  to, or  consent  to the  offer for  sale, sale,
transfer, tender, pledge, encumbrance, assignment  or other disposition of,  any
or  all of such Shareholder's Shares or  any interest in those Shares; (b) grant
any proxies or powers  of attorney, deposit  any Shares into  a voting trust  or
enter into a voting agreement with respect to any Shares; or (c) take any action
that  would  make any  representation  or warranty  of  such Shareholder  in the
Shareholders Agreement untrue or incorrect or  have the effect of preventing  or
disabling  such Shareholder from performing such Shareholder's obligations under
the Shareholders Agreement.
 
CONFIDENTIALITY AGREEMENT
 
    The Parent and  the Company  entered into a  Confidentiality and  Standstill
Agreement,  dated August 16,  1995 (the "Confidentiality  Agreement"), a copy of
which is  filed  as Exhibit  3  hereto  and incorporated  herein  by  reference.
Pursuant  to  the  Confidentiality  Agreement, the  Parent  agreed,  among other
things, that  it would  keep  confidential certain  information  ("Information")
furnished to it by the Company and to use the Information solely for the purpose
of evaluating a business transaction between the Parent and the Company.
 
AGREEMENTS FOR OWNERSHIP OF CORVITA CANADA, INC.
 
    As  a condition of the Merger Agreement,  the Company entered into two stock
purchase agreements and  other related transactions  contemplated by such  stock
purchase  agreements, by which  it agreed to  purchase, directly and indirectly,
ownership of all of the issued and outstanding common
 
                                       5

stock of Corvita Canada, Inc., an Ontario, Canada corporation ("Corvita Canada")
that is not currently owned by the Company. Currently, the Company owns  115,000
shares  of Corvita Canada common stock,  120,000 shares of Corvita Canada common
stock are owned by Cardiovascular Innovations Canada, Inc. ("CICI"), an Ontario,
Canada corporation,  and 3,500  shares  of Corvita  Canada  stock are  owned  by
Research Visions Canada, Inc., a Canadian corporation ("RVC").
 
    CICI  STOCK PURCHASE AGREEMENT.  Pursuant to  an agreement dated as of April
11, 1996 among  George A.  Adams, Ph.D., David  C. MacGregor,  M.D., Gregory  J.
Wilson  and Jennie M. Wilson as trustees for the Gregory Wilson Family Trust and
Jennie M. Wilson (collectively, the "CICI  Sellers") and the Company, a copy  of
which  is filed as  Exhibit 4 hereto  and incorporated herein  by reference, the
Company agreed to  purchase all of  the issued and  outstanding common stock  of
CICI,  for an aggregate purchase price  of US$1,943,320. The Company also agreed
to repay to the CICI Sellers the unpaid balance of outstanding shareholder loans
previously made by the CICI Sellers to CICI, together with accrued interest,  in
the  aggregate amount of  CAN$16,320. The Company's purchase  of the CICI common
stock is subject to the conditions, among others, that (a) the Company,  Parent,
and  the Merger Sub shall have entered  into the Merger Agreement and (b) Merger
Sub shall have made the Offer and  shall have accepted for payment and paid  for
all of the Shares validly tendered and not withdrawn pursuant to the Offer.
 
    RVC  STOCK PURCHASE AGREEMENT.   Pursuant to an agreement  dated as of April
11, 1996, between RVC  and the Company, a  copy of which is  filed as Exhibit  5
hereto  and incorporated  herein by  reference, the  Company agreed  to purchase
3,500 shares  of Corvita  Canada common  stock  owned by  RVC for  an  aggregate
purchase price of US$56,680.
 
    RELATED  AGREEMENTS.   The other  agreements related  to the  stock purchase
agreements described above are: (a) an escrow agreement whereby the certificates
for shares of CICI  common stock will  be held in  escrow pending completion  or
termination  of the CICI stock purchase; (b) a trust deposit agreement whereby a
portion of the purchase price for CICI common stock being sold to the Company by
David C. MacGregor,  M.D. will be  held in  trust for the  payment of  potential
Canadian  withholding  tax  liability  with  respect  to  his  stock  sale  (or,
alternatively, for release to Dr. MacGregor upon his provision of an appropriate
certificate issued  by the  Canadian Minister  of National  Revenue pursuant  to
Section 116 of the Income Tax Act of Canada); (c) a letter agreement between the
Parent and Dr. MacGregor, whereby the Parent has agreed that it will not make or
cause  to be made any  election under Section 338  of the United States Internal
Revenue Code of 1986, as amended,  with respect to the Merger Sub's  acquisition
of  the stock of the Company pursuant to  the terms of the Merger Agreement, and
has further agreed that in  the event the Parent does  make or cause to be  made
such  a Section 338 election,  the Parent will indemnify  Dr. MacGregor for U.S.
federal income tax liability arising as a result of such election; (d) a  letter
agreement  between the  Parent and Corvita  Canada whereby the  Parent agrees to
reimburse Corvita  Canada  an amount  of  up to  US  $250,000 for  the  loss  of
preferential  rates for certain refundable research and development tax credits,
in the event that the Merger Agreement  is terminated by the Company in  certain
specified  circumstance  and provided  that such  credits  are actually  lost by
Corvita Canada as a result of the execution of the CICI Stock Purchase Agreement
and the RVC Stock Purchase Agreement; and (e) a letter agreement between Corvita
Canada and the Parent whereby  Corvita Canada agrees that  from the date of  the
letter  agreement until  the earlier  of the completion  of the  purchase by the
Company of the common stock of CICI or the termination of the Merger  Agreement,
Corvita Canada will conduct its operations and maintain its books and records in
its  usual  manner and  consistently with  past practice  and will  refrain from
entering into certain  specified transactions and  agreements without the  prior
written consent of the Parent.
 
                                       6

LOAN AGREEMENT AND LICENSE AGREEMENT
 
    The  Parent and the Company  entered into a loan  agreement, dated April 11,
1996 (the "Loan Agreement"), whereby the  Parent agreed to make advances to  the
Company  from time to time in an aggregate amount not to exceed $2,000,000 until
the earlier to  occur of (a)  the termination  of the Merger  Agreement and  (b)
August  9,  1996.  Borrowings  under  the  Loan  Agreement  are  evidenced  by a
promissory note of the Company, dated April 11, 1995 (the "Promissory Note"), by
the terms of  which outstanding  principal amounts bear  interest at  a rate  of
8.25%  per annum, such  interest is payable monthly  in arrears, and outstanding
principal amounts are due and payable upon  demand of the Parent at any time  on
or after the earlier to occur of (i) August 9, 1996, (ii) the termination of the
Merger  Agreement and (iii) the consummation  of the Merger (I.E., the Effective
Time). Pursuant  to the  Loan  Agreement and  the  Promissory Note,  the  Parent
advanced  $550,000 to the Company on April 12, 1996, and agreed to advance up to
$150,000 every five business  days upon the  Company's request, after  receiving
the  Company's certificate to the  effect that (x) the  requested amount will be
used to pay obligations of the Company that were incurred in the ordinary course
of business and that are  set forth in a  schedule accompanying the request,  or
that are obligations set forth in a schedule to the Loan Agreement, and (y) that
the  Company  is  continuing to  operate  its  business in  the  ordinary course
consistent with past practice.
 
    In connection with the  Loan Agreement and Promissory  Note, the Parent  and
the Company entered into a License Agreement, dated April 11, 1995 (the "License
Agreement"),  whereby the Company  granted the Parent  a non-exclusive worldwide
license to make, have made, use,  sell and otherwise dispose of a  polycarbonate
urethane  material that is covered by, whose  method of making or use is covered
by, or that is a component of an article of manufacture covered by at least  one
claim  of certain patents and patent applications  owned by the Company, and any
related counterparts, foreign equivalents, divisions and continuations in  part.
Copies of the Loan Agreement, the Promissory Note and the License Agreeement are
collectively   filed  herewith   as  Exhibit   6  and   incorporated  herein  by
reference.The License Agreement may be terminated by the Company upon payment in
full of principal and  interest payable to the  Parent under the Loan  Agreement
and Promissory Note, provided that such payment is made on or before the earlier
of  (xx) August 9, 1996  and (yy) forty-five days  after the Merger Agreement is
terminated in  one of  a number  of specified  circumstances. In  certain  other
circumstances, including the institution of bankruptcy or insolvency proceedings
by  the Company or  by undisclosed creditors  of the Company  as provided in the
License Agreement, or termination of the  Merger Ageeement by the Company  after
its receipt of a Superior Proposal, the License Agreement may not be terminated,
even if the Company repays in full all amounts of principal and interest payable
to the Parent under the terms of the Loan Agreement and Promissory Note.
 
TRANSFERS OF SHARES OF EUROPEAN SUBSIDIARIES
 
    Norman  R.  Weldon,  Ph.D.,  the  Company's  President  and  Chief Executive
Officer, has agreed to transfer to an individual to be designated by the  Parent
one  share of the capital  stock of Corvita Europe,  S.A. ("Corvita Europe") now
owned by  Dr.  Weldon; Herbert  Kontges,  Ph.D., Managing  Director  of  Corvita
Europe,  has agreed to transfer to an  individual to be designated by the Parent
one share of the capital stock of  Corvita Europe now owned by Dr. Kontges;  and
Dr. Weldon has agreed to transfer to an individual designated by the Parent five
shares  of  the capital  stock  of Laboratoire  Corvita,  S.A.R.L. ("Laboratoire
Corvita") now owned  by Dr. Weldon.  Corvita Europe is  a corporation  organized
under  the  laws of  Belgium; it  has  51,500 shares  of issued  and outstanding
capital stock, 51,498 of which are owned by the Company. Laboratoire Corvita  is
a  corporation organized under the  laws of France; it  has 500 shares of issued
and outstanding capital stock, 495 of which are owned by the Company. The  share
transfers  by Dr. Weldon and Dr. Kontges will become effective on the Acceptance
Date. Dr. Weldon and Dr. Kontges have each delivered stock powers to the  Parent
for  the  purpose  of effecting  such  share  transfers in  accordance  with the
foregoing agreements.
 
MATERIAL AGREEMENTS
 
    The Company and  Corvita Europe  have entered into  certain agreements  with
third  parties, which agreements  are designated as  "Material Agreements" under
the provisions of the Merger Agreement
 
                                       7

and are required to  be in effect  to satisfy the conditions  of the Offer.  The
agreements  so designated are: (a) a  License Termination Agreement, dated as of
December 1,  1995,  between the  Company  and  Sumitomo Bakelite  Co.,  Ltd.,  a
Japanese  corporation ("Sumitomo"), terminating the  License Agreement, dated as
of June 19,  1990, between the  Company and Sumitomo;  (b) a License  Agreement,
dated  as of January 24, 1996, among  Corvita Europe, Jean Pierre Dereume, M.D.,
and L'Universite Libre de Bruxelles; (c) a Consent to Assignment provided to the
Company by Vascor, Inc., dated April  9, 1996, whereby Vascor, Inc. consents  to
the  assignment  to  The Polymer  Technology  Group  ("PTG") of  certain  of the
Company's rights and  obligations under  a License and  Supply Agreement,  dated
November  30,  1993,  between  Vascor,  Inc.  and  the  Company;  (d)  a License
Agreement, dated April 9, 1996 between the Company and PTG; and (e) the CICI and
RVC Stock Purchase Agreements.
 
ITEM 4.  THE SOLICITATION OR RECOMMENDATION.
 
    (A)  RECOMMENDATION OF THE BOARD OF DIRECTORS.
 
    The Board of Directors has unanimously determined that the consideration  to
be  paid for each Share in the Offer  and the Merger is fair to the shareholders
of the Company  and that  the Offer  and the Merger  are otherwise  in the  best
interests  of the  Company and  its shareholders,  has approved  and adopted the
Merger Agreement and the transactions contemplated thereby, including the  Offer
and  the Merger, and recommends that all  holders of Shares accept the Offer and
tender their Shares pursuant to the Offer.
 
    Copies of a letter to  the Company's shareholders communicating the  Board's
recommendation  and a press release announcing  the Merger Agreement and related
transactions are  filed herewith  as Exhibits  7 and  8, respectively,  and  are
incorporated herein by reference.
 
    (B)  BACKGROUND AND REASONS FOR THE BOARD'S RECOMMENDATION.
 
    BACKGROUND.   Beginning in early, 1993, the Company and the Parent from time
to time  discussed  the possibility  of  a strategic  relationship  or  business
transaction  between  their companies.  Representatives of  the Company  and the
Parent met to discuss a possible  joint development of medical device  products,
and  exchanged  technical information  pursuant  to a  confidentiality agreement
between the companies.
 
    On June  29, 1993,  representatives of  the Parent  and the  Company met  to
continue their discussions of a possible joint technical development arrangement
between  the companies. At  that meeting, a representative  of the Parent raised
the possibility of the Parent acquiring  an equity investment in the Company  in
exchange for rights in certain proprietary technology of the Company.
 
    Discussions  of a possible joint development arrangement, possibly including
an equity investment in  the Company, continued throughout  the summer of  1993.
Those discussions were terminated before the end of 1993.
 
    The  Company has sold polycarbonate urethane  material to Howmedica, Inc., a
subsidiary of  the  Parent.  Howmedica,  Inc. has  purchased  the  material  for
evaluation.
 
    During  1994, the Company  had a series of  discussions with other potential
corporate partners concerning a possible  investment or strategic alliance.  The
Board  of Directors of the Company directed  Howard S. Wachtler, the Chairman of
the Board's Business  Development Committee, to  participate with management  in
pursuing such opportunities. The Company concluded a private equity placement in
early  1994 and  a public  offering on  November 1,  1994. The  Company remained
interested in  finding a  strategic  partner or  investor relationship  to  help
broaden  the Company's  market reach and  to strengthen  the Company's financial
position.
 
    By late  1994,  the  Company  was discussing  possible  terms  of  strategic
relationships  with three other companies. One  such arrangement was proposed to
involve the  joint  development of  a  coronary stent  product,  a  distribution
arrangement  for the Company's products  in Europe, and a  sale of a significant
portion of the Company's  equity to the  corporate partner. Another  arrangement
under
 
                                       8

discussion at that time was proposed to involve a substantial equity investment,
a  commitment for future  stock purchases, a  commitment to fund  certain of the
Company's clinical trials, and a product  distribution agreement for one of  the
Company's  product lines. A  third was proposed to  involve a substantial equity
investment and a  grant of marketing  rights for  one or more  of the  Company's
product  lines. In  each case, the  Company's Board of  Directors authorized the
Company's management and the Board's  Business Development Committee to  proceed
with discussions, and reviewed possible terms for the conclusion of a definitive
agreement; however, in each case, the parties ultimately were unable to agree on
terms  and discussions  with those  potential corporate  partners were  ended in
December, 1994 and in early 1995.
 
    During 1995, the Company conducted a series of meetings and discussions with
a fourth potential corporate partner, which  led to in-depth discussions of  the
terms for a possible transaction. The terms under discussion included a possible
series of capital investments in the Company, with possible rights to purchase a
controlling  interest, and possible marketing rights  for distribution of one or
more of the Company's products.
 
    In addition to the four potential strategic alliance arrangements  described
above,  management of the Company and  Mr. Wachtler continued throughout 1995 to
engage in discussions with a number  of other potential investors and  corporate
partners. In May 1995, a representative of the Parent contacted a shareholder of
the  Company  regarding the  possible  acquisition by  the  Parent of  an equity
interest in the Company. The Parent's  representative was told that the  Company
was considering a number of strategic alternatives, including a possible sale of
the Company, and was referred to Mr. Wachtler. In June 1995, a representative of
the  Parent  and  Mr.  Wachtler  discussed  the  Parent's  possible  interest in
exploring an acquisition of the Company.
 
    In early 1995, the Company also began to seek an investment banking firm  to
advise  the  Company  in its  consideration  of corporate  partner  or strategic
alliance opportunities  and financing  alternatives. Management  of the  Company
spoke  with representatives of several investment banking firms, and reported to
the Board of Directors and its  Business Development Committee on their  efforts
to  identify an investment banking  firm to serve as  a financial advisor to the
Company.
 
    In late June  and early July,  1995, representatives of  the Company met  in
person  and by telephone with Dillon, Read & Co. Inc. ("Dillon Read") to discuss
the possibility  of Dillon  Read advising  the Company.  On July  10, 1995,  the
Company  entered into an engagement letter with Dillon Read, whereby the Company
agreed to engage  Dillon Read for  a period of  one year to  serve as  exclusive
financial  advisor to  the Company  with respect  to business  combinations. The
engagement letter contemplated  that Dillon  Read would  advise concerning  such
possible  transactions as, among others, a sale of part of the Company by way of
a sale of common  stock, assets, or other  securities, or a sale  of all of  the
Company  by  way of  a merger,  transfer of  assets, or  otherwise, for  cash or
securities, in one or a series of transactions.
 
    In addition, on July  19, 1995, the Company  entered into an agreement  with
Maredo,  Ltd. for  advisory services with  respect to a  possible financing with
certain European institutional investors. The  Company also spoke with a  number
of   investment  banking   firms  during  1995   concerning  possible  financing
transactions.
 
    Dillon Read initiated or reopened contacts with more than fourteen companies
that it or  the Company  had identified as  potential corporate  partners of  or
investors  in the Company. Throughout  the remainder of 1995  and in early 1996,
Dillon Read worked with the  Company and Mr. Wachtler  to solicit interest in  a
strategic alliance with or acquisition of the Company.
 
    As  part of this  effort, a representative  of Dillon Read  and Mr. Wachtler
telephoned the Parent to further explore a possible acquisition of the  Company,
and  Dillon  Read  sent  the  Parent on  July  18,  1995  an  information packet
describing the Company.
 
    On  August  16,  1995,  the  Parent   and  the  Company  entered  into   the
Confidentiality   Agreement,  and  shortly  thereafter,  the  Parent  began  due
diligence meetings with management and technical
 
                                       9

personnel of the Company. Pursuant to the Confidentiality Agreement, the  Parent
requested  and received  certain non-public information  concerning the Company.
Subsequent due diligence meetings and document reviews were conducted throughout
the fall of 1995.
 
    On October 4, 1995, a representative of Dillon Read and a representative  of
the  Parent spoke concerning the Parent's interest in acquiring the Company. The
Parent's representative  initiated an  exploratory discussion  of both  parties'
positions with respect to a possible price for a transaction.
 
    In   mid-October,   a  representative   of  Dillon   Read  indicated   to  a
representative of Lazard Freres that the Company's Board of Directors would like
to receive  a written  expression  of interest  in  acquiring the  Company  from
Parent.  The Parent responded by providing  a written, non-binding indication of
interest from the Parent  to acquire the Company  at $10.00 per share,  provided
that the Company negotiate exclusively with the Parent.
 
    On  October 17,  1995, Dillon  Read and  Epstein Becker  & Green,  P.C., the
Company's legal advisors, reviewed  with the Board of  Directors of the  Company
the  status of discussions with various potential corporate partners. As part of
that discussion, the Board reviewed the Parent's written, non-binding indication
of interest,  and  although  the Board  supported  continuing  negotiations,  it
rejected the exclusivity provision. A representative of Dillon Read communicated
the  Board's position  to a representative  of Lazard Freres.  The Lazard Freres
representative asked whether there was an acquisition price at which the Company
would negotiate exclusively with Parent.  After further deliberation, the  Board
of  Directors  of  the  Company  indicated that  it  would  permit  an exclusive
negotiation at price of $12.00  per share. On October  18, 1995, P. Nigel  Gray,
President  of the Parent's Hospital Products Group, sent a non-binding letter to
the Company  confirming the  interest of  the Parent  in purchasing  all of  the
outstanding  shares of common stock  of the Company at  a price of approximately
$10.00 per share, without an exclusivity provision.
 
    On November 2, 1995, representatives of  the Company, the Parent and  Dillon
Read  met in New York and discussed  the status of certain intellectual property
rights of  the  Company, and  the  potential  for obtaining  or  clarifying  the
Company's  ownership of certain European  and Japanese rights through agreements
with third parties.  The Parent asked  that the Company  pursue agreements  with
those  third parties  and indicated  that obtaining  such agreements  would be a
condition of  any  possible acquisition  offer  by the  Parent.  Following  that
meeting,  the Company began negotiations with the third parties in question with
a view to obtaining the agreements the Parent had requested.
 
    On December 1, 1995,  the Company received  a letter from  one of the  other
potential  corporate partners with  whom it had  been having serious discussions
concerning a possible  strategic relationship  with, and an  investment in,  the
Company,  in which that other company indicated it would not be in a position to
make an offer to the Company.
 
    In early December 1995, the Parent and its counsel presented the Company and
the Company's counsel  with a  proposed draft  merger agreement  and a  proposed
draft shareholders agreement. The draft merger agreement referred to a number of
conditions  to  any  offer  by  the  Parent,  including  third-party  agreements
concerning  European  and  Japanese  intellectual  property  rights   previously
requested  by the Parent, the agreement  of certain shareholders to tender their
stock to the  Parent or  Merger Sub,  and a  proposed license  of the  Company's
technology to the Parent.
 
    Also in early December, Mr. Wachtler and a representative of Dillon Read met
with  Mr. Gray and  a representative of  Lazard Freres to  discuss the status of
negotiations between the  parties, including the  range of prices  at which  the
Parent  might make an acquisition offer. The Company's representatives indicated
that the Company  was interested  in receiving  $11.00 per  Share. The  Parent's
representatives   indicated  that  the  Parent   was  considering  an  offer  at
approximately $10.00 per share,  but that the  aggregate consideration might  be
increased  by  up  to $4  million  less the  cost  to the  Company  of obtaining
third-party agreements that  the Parent  had identified  as a  condition of  any
possible offer.
 
    Throughout  the remainder  of December, 1995  and January,  1996, the Parent
continued its due diligence  efforts and counsel to  the Parent and the  Company
continued preparation and negotiation of
 
                                       10

documentation  for a  merger agreement between  the Parent and  the Company. Mr.
Wachtler kept members of the Board of  Directors of the Company informed of  the
status  of negotiations with  the Parent by means  of numerous informal reports.
Dillon  Read  also  continued  its  efforts  to  identify  alternative  business
combination   opportunities.  The  Company  received  preliminary  requests  for
information from two companies in January 1996, and continued discussions in the
United States and in Europe with another potential corporate partner.
 
    On January  18,  1996,  the Company  issued  a  press release  in  which  it
announced  that it was undergoing discussions for  its acquisition at a price in
the range of approximately $10.00 per share.
 
    In late  January and  February,  1996, representatives  of the  Parent,  the
Company  and their  counsel met to  discuss the Company's  supply agreements for
supply of polycarbonate  urethane material. Representatives  of the Company  and
the  Parent  discussed  seeking  potential  third  party  manufacturers  of  the
Company's polycarbonate urethane material.
 
    Through the  remainder  of  February  and during  March  1996,  the  parties
continued  to negotiate the  terms of an acquisition  agreement, the Company and
its counsel continued to  pursue obtaining the  third-party agreements that  had
been  requested by Parent,  and Mr. Wachtler, the  Company's management, and its
finacial and legal adivsors continued to make reports to the Board of  Directors
concerning the status of negotiations with the Parent.
 
    During  this same period,  the Parent's financial  advisor and the Company's
financial advisor continued to hold discussions concerning, among other  things,
the  offer and  merger consideration.  Representatives of  the Company discussed
with representatives of  the Parent the  Company's need to  obtain financing  to
fund  the Company's operational needs. In  February 1996, the parties' financial
advisors discussed  the  transaction by  telephone  and the  Parent's  financial
advisor indicated that the Parent would likely consider an offer in the range of
$10.25  to $10.50 per share, assuming that the parties were able to resolve open
points and that  the conditions established  by the Parent  were satisfied,  and
subject  to  the  Parent  receiving  current  information  with  respect  to the
Company's cash balances and payables.
 
    At a meeting of the Board of Directors of the Company on February 29,  1995,
among  other business,  the Board  ratified and  approved the  license agreement
among Corvita Europe, Jean Pierre Dereume and L'Universite Libre de Bruxelles.
 
    In March and early April, Parent and the Company continued negotiations that
culminated in Parent and  the Company agreeing upon  a form of merger  agreement
and  certain shareholders  agreeing upon a  form of  Shareholders agreement. The
Company also continued negotiations to  obtain third-party manufacturers of  the
Company's polycarbonate urethane material.
 
    On   April  4,  1996,  a  representative   of  Lazard  Freres  telephoned  a
representative of Dillion Read to indicate that the Parent was prepared to  make
an  acquisition  offer of  $10.25 per  share, subject  to completing  the Merger
Agreement and the transactions contemplated in the Merger Agreement.
 
    The Board of Directors of the Company met on April 5, 1996, to consider  the
Parent's proposed acquisition offer and the terms of the draft merger agreement.
Representatives  of Epstein,  Becker & Green,  P.C. reviewed in  detail with the
Board the  terms of  the proposed  merger agreement,  the proposed  Shareholders
agreement,  the  conditions  of  the offer,  and  the  related  transactions and
agreements contemplated  by the  proposed merger  agreement. Epstein,  Becker  &
Green,  P.C. also explained the procedures  for the tender offer contemplated by
the terms  of the  proposed  merger agreement.  Representatives of  Dillon  Read
distributed  materials in  draft form supporting  Dillon Read's  analysis of the
offer from a financial point of view, discussed a range of offer prices at which
Dillon Read might be able to conclude that an offer was fair, and noted that the
$10.25 proposed  offer price  was  within such  range.  The Board  of  Directors
conducted  a discussion of the information  presented by its legal and financial
advisors, and  considered  the  factors  described  below  at  REASONS  FOR  THE
TRANSACTIONS;  FACTORS CONSIDERED BY THE BOARD.  The Board of Directors resolved
to approve the
 
                                       11

proposed merger agreement, the proposed  shareholders agreement, and the  offer,
subject  to the  satisfactory completion of  negotiations of  the remaining open
points,  including  conclusion  of  a  license  agreement  with  a   third-party
manufacturer, and receipt of a fairness opinion of Dillon Read.
 
    During  the period from  April 5 through April  11, 1996, representatives of
each of the Company, the Parent,  and their respective legal advisors  completed
negotiations  of the  remaining open  points of  the proposed  merger agreement,
finalized documentation of the Merger Agreement, the Shareholders Agreement, and
other related agreements and documents, and continued discussions of a  possible
loan  from the Parent to the  Company. On April 10 and  the morning of April 11,
the parties concluded the terms  of a Loan Agreement  and Promissory Note for  a
loan  by  the  Parent of  up  to  $2,000,000, together  with  a  related License
Agreement.
 
    On the morning of April 11, 1996, Dillon Read delivered its Opinion, and the
Merger Agreement, the Shareholders Agreement, the Loan Agreement and the License
Agreement were executed and the transaction was publicly announced.
 
    REASONS FOR THE TRANSACTIONS; FACTORS CONSIDERED BY THE BOARD.  In approving
the Merger Agreement and the transactions contemplated thereby and  recommending
that  all holders of Shares tender their Shares pursuant to the Offer, the Board
of Directors considered a number of factors, including:
 
         1. the financial and  other terms and conditions  of the Offer and  the
    Merger Agreement;
 
         2.  the  presentation of  Dillon Read  at  the April  5, 1996  Board of
    Directors' meeting, and the Board of Directors' expectation that Dillon Read
    would supply an opinion to  the effect that, as of  the date of its  opinion
    and based upon and subject to certain matters stated therein, the $10.25 per
    Share cash consideration to be received by the holders of Shares pursuant to
    the  Offer and the  Merger is fair, from  a financial point  of view, to the
    public shareholders of  the Company (the  "Opinion"). Dillon Read  presented
    its  final Opinion on April 11, 1996,  the full text of which, setting forth
    the assumptions  made,  matters considered  and  limitations on  the  review
    undertaken  by  Dillon  Read,  is  attached  hereto  as  Exhibit  9  and  is
    incorporated herein by reference. Shareholders are urged to read the Opinion
    carefully in its entirety;
 
         3. the fact that the structure of the acquisition of the Company by the
    Merger Sub as provided  for in the Merger  Agreement involves a cash  tender
    offer  for all outstanding Shares to  be commenced within five business days
    of the public  announcement of the  Merger Agreement and  to be followed  as
    promptly  as practicable  by a  merger for  the same  consideration, thereby
    enabling the Company's shareholders to obtain  cash for their Shares at  the
    earliest possible time;
 
         4. the fact that the Merger Agreement, which prohibits the Company, its
    subsidiaries   and   their   respective   officers,   directors,  employees,
    representatives,  agents  or  affiliates  from  initiating,  soliciting   or
    knowingly  encouraging any potential Acquisition Proposal (as defined in the
    Merger Agreement), permits the Company to furnish non-public information to,
    or to enter into,  maintain or continue  discussions and negotiations  with,
    any  person or entity  that makes an unsolicited  inquiry, offer or proposal
    relating to an Acquisition Proposal after the date of the Merger  Agreement,
    if the Board of Directors, after consultation with and based upon the advice
    of  counsel,  determines that  failure to  do so  would create  a reasonable
    possibility of breach of its fiduciary duties;
 
         5. the fact that in the event  that the Board were to decide to  accept
    an  Acquisition Proposal  by a  third party,  the Board  could terminate the
    Merger Agreement and pay the Parent a termination fee of $4,000,000  million
    (or approximately $0.56 per outstanding Share and $0.48 per Share on a fully
    diluted basis). The Board, after considering, among other things, the advice
    of  Dillon Read, did not believe that such termination provision would deter
    a higher offer by a third party interested in acquiring the Company;
 
                                       12

         6. the fact that the  obligations of the Parent  and the Merger Sub  to
    consummate  the Offer  and the  Merger pursuant to  the terms  of the Merger
    Agreement are not conditioned upon financing;
 
         7. the  fact that  on January  18,  1996, the  Company issued  a  press
    release that stated that the Company was in discussions regarding a possible
    acquisition  of the Company  in the $10  per Share range,  and the fact that
    neither prior  nor subsequent  to such  press release  did any  other  party
    indicate  a willingness to pursue  an acquisition of the  Company for a cash
    price in excess  of the $10.25  per Share  price offered by  the Parent  and
    Merger Sub;
 
         8.  the  fact that  the  Shareholders were  willing  to enter  into the
    Shareholders Agreement pursuant to which they agreed to tender substantially
    all of their Shares pursuant to the Offer and to vote their Shares in  favor
    of  the Merger; it being noted by the Board of Directors of the Company that
    the Shareholders will be treated the  same as all other shareholders in  the
    Offer and the Merger;
 
         9. the fact that the terms of the Merger Agreement and the Shareholders
    Agreement  should not unduly discourage other third parties from making bona
    fide proposals subsequent to signing the  Merger Agreement and, if any  such
    proposal  were made, the  Company, in the exercise  of its fiduciary duties,
    could determine to provide  information to and  engage in negotiations  with
    any other third party;
 
        10.  the historical market price of, and recent trading activity in, the
    Shares; information  with  regard to  the  financial condition,  results  of
    operations,  competitive position, business and prospects of the Company, as
    reflected  in  the  Company's  projections;  current  economic  and   market
    conditions  (including  current  conditions  in the  industry  in  which the
    Company is engaged) and  the going concern value  of the Company; the  Board
    did  not  consider the  liquidation of  the  Company as  a viable  course of
    action, and, therefore, no appraisal  or liquidation values were sought  for
    purposes of evaluating the Offer and the Merger;
 
        11.  the possible alternatives  to the Offer  and the Merger, including,
    without limitation,  continuing to  operate the  Company as  an  independent
    entity and the risks associated therewith;
 
        12. the familiarity of the Board of Directors with the business, results
    of  operations, properties  and financial condition  of the  Company and the
    nature of the industry in which it operates;
 
        13. the compatibility of  the business and  operating strategies of  the
    Parent and the Company; and
 
        14.   the  regulatory  approvals  required  to  consummate  the  Merger,
    including,  among  others,  antitrust  approvals,  and  the  prospects   for
    receiving such approvals.
 
    The  Board of Directors  did not assign  relative weights to  the factors or
determine that any  factor was of  particular importance. Rather,  the Board  of
Directors  viewed  their  position  and recommendation  as  being  based  on the
totality of the information presented to and considered by it.
 
ITEM 5.  PERSONS RETAINED, EMPLOYED OR TO BE COMPENSATED.
 
    Dillon Read  was retained  to act  as financial  advisor to  the Company  in
considering  and reviewing possible business  combinations, including a possible
sale of the Company. Dillon Read will receive upon the purchase of Shares by the
Parent pursuant to the Offer total compensation equal to $500,000 plus 3% of the
consideration in excess of  $50,000,000 when and as  paid to the Company  and/or
the shareholders, or approximately $1.55 million (the "Transaction Fee"). Dillon
Read  was paid a $25,000 engagement fee and  is being paid a fee of $200,000 for
its Opinion, which  amounts will be  credited against the  Transaction Fee.  The
Company  incurred  the obligation  to pay  the  Opinion fee  on delivery  of the
Opinion.  The  Company  also  has  agreed  to  reimburse  Dillon  Read  for  its
out-of-pocket  expenses, including fees  of its legal  counsel, and to indemnify
Dillon Read (and its officers, directors, employees,
 
                                       13

controlling persons and agents) against certain liabilities arising out of or in
connection with Dillon Read's engagement. The terms of the Company's  engagement
of Dillon Read are set forth in a letter agreement dated July 10, 1995.
 
    Except as disclosed herein, neither the Company nor any person acting on its
behalf  currently intends  to employ, retain  or compensate any  other person to
make  solicitations  or  recommendations  to  security  holders  on  its  behalf
concerning the Offer or the Merger.
 
ITEM 6.  RECENT TRANSACTIONS AND INTENT WITH RESPECT TO SECURITIES.
 
    (a) No transactions in the Shares have been effected during the past 60 days
by  the Company  or, to the  best of  the Company's knowledge,  by any executive
officer, director, affiliate or subsidiary of the Company.
 
    (b) To the  best knowledge of  the Company, all  of its executive  officers,
directors,  affiliates and subsidiaries  currently intend to  tender pursuant to
the Offer all Shares beneficially owned by them (other than Shares issuable upon
exercise of stock options and Shares, if any, which if tendered could cause such
persons to incur liability under the provisions of Section 16(b) of the Exchange
Act).
 
ITEM 7.  CERTAIN NEGOTIATIONS AND TRANSACTIONS BY THE SUBJECT COMPANY.
 
    (a) Except as set forth in this  Schedule 14D-9, the Company is not  engaged
in  any negotiation in response to the Offer which relates to or would result in
(i) an extraordinary transaction, such as a merger or reorganization,  involving
the  Company or any subsidiary of the Company; (ii) a purchase, sale or transfer
of a material amount of assets by the Company or any subsidiary of the  Company;
(iii)  a  tender offer  for  or other  acquisition of  securities  by or  of the
Company; or (iv) any  material change in the  present capitalization or  divided
policy of the Company.
 
    (b)  Except as described  in Item 3(b)  and Item 4  above (the provisions of
which are hereby incorporated  by reference), there  are no transactions,  board
resolutions,  agreements in  principle or  signed contracts  in response  to the
Offer which relate to or would result in one or more of the matters referred  to
in paragraph (a) of this Item 7.
 
ITEM 8.  ADDITIONAL INFORMATION TO BE FURNISHED.
 
    None.
 
                                       14

ITEM 9.  MATERIAL TO BE FILED AS EXHIBITS.
 


EXHIBIT NO.
- -----------
          
 Exhibit 1   Agreement  and Plan of Merger, dated as of April 11, 1996, among Corvita Corporation, Pfizer Inc. and
             HPG Acquisition Corp.
 Exhibit 2   Shareholders Agreement, dated  as of April  11, 1996, among  Pfizer Inc., HPG  Acquisition Corp.  and
             certain shareholders named therein, and including Schedule 1 thereto.
 Exhibit 3   Confidentiality  and Standstill Agreement, dated August 16, 1995,  between Dillon, Read & Co. Inc. on
             behalf of Corvita Corporation and Pfizer Inc.
 Exhibit 4   Stock Purchase Agreement, dated as of April 11, 1996, among Corvita Corporation and George A.  Adams,
             David  C. MacGregor, Gregory J. Wilson and Jennie M. Wilson as trustees for the Gregory Wilson Family
             Trust, and Jennie M. Wilson.
 Exhibit 5   Stock Purchase  Agreement, dated  as of  April 11,  1996, between  Corvita Corporation  and  Research
             Visions Canada, Inc.
 Exhibit 6   Loan Agreement, dated April 11, 1996, between Pfizer Inc. and Corvita Corporation; Promissory Note of
             Corvita  Corporation, dated  April 11,  1996; and  License Agreement,  dated April  11, 1996, between
             Corvita Corporation and Pfizer Inc.
 Exhibit 7   Letter to Shareholders of Corvita Corporation, dated April 17, 1996.
 Exhibit 8   Press Release, dated April 11, 1996, issued by Pfizer Inc. and Corvita Corporation.
 Exhibit 9   Opinion of Dillon, Read & Co. Inc., dated April 11, 1996, and Consent by Dillon Read to the inclusion
             of the Opinion as an Exhibit, dated April 16, 1996.

 
                                       15

                                   SIGNATURE
 
    After  reasonable inquiry  and to  the best  of my  knowledge and  belief, I
certify that the information set forth  in this statement is true, complete  and
correct.
 
Dated: April 17, 1996
 
                                          By         /s/ NORMAN R. WELDON
 
                                             -----------------------------------
                                               Name: Norman R. Weldon, Ph.D.
                                               Title: President and Chief
                                             Executive Officer

                                                                      SCHEDULE I
 
                              CORVITA CORPORATION
                             8210 N.W. 27TH STREET
                              MIAMI, FLORIDA 33122
                            ------------------------
 
                       INFORMATION STATEMENT PURSUANT TO
                        SECTION 14(F) OF THE SECURITIES
                 EXCHANGE ACT OF 1934 AND RULE 14F-1 THEREUNDER
 
    The  Information Statement is  being mailed on  or about April  17, 1996, as
part  of  the  Solicitation/Recommendation  Statement  on  Schedule  14D-9  (the
"Schedule  14D-9"). You are  receiving this Information  Statement in connection
with the possible election of persons designated by the Parent to a majority  of
the  seats  on the  Board  of Directors  of  the Company.  The  Merger Agreement
requires the Company to take all action necessary to cause the Parent  Designees
(as  defined  below)  to  be  elected  to  the  Board  of  Directors  under  the
circumstances described  therein.  This  Information Statement  is  required  by
Section  14(f)  of the  Exchange  Act and  Rule  14f-1 thereunder.  See "General
Information Regarding the  Company". Capitalized  terms used  and not  otherwise
defined herein shall have the meaning set forth in the Schedule 14D-9.
 
    You  are urged  to read this  Information Statement carefully.  You are not,
however, required to take any action.
 
    Pursuant to the  Merger Agreement,  the Merger  Sub commenced  the Offer  on
April  17, 1996. The Offer  is scheduled to expire at  12:00 Midnight on May 14,
1996, unless the Offer is extended.
 
    The following information is  based on the  Company's Proxy Statement  dated
September  15, 1995, and, except  as indicated, such information  is given as of
such date.
 
    The  information  contained   in  this   Information  Statement   (including
information incorporated by reference) concerning the Parent, the Merger Sub and
the  Parent Designees has been  furnished to the Company  by the Parent, and the
Company assumes  no responsibility  for  the accuracy  or completeness  of  such
information.  Certain capitalized terms used but not defined in this Information
Statement have the meanings ascribed to them in the Schedule 14D-9.
 
GENERAL INFORMATION REGARDING THE COMPANY
 
    The Shares are  the only  class of voting  securities of  the Company.  Each
Share  entitles its record holder  to one vote. As of  April 4, 1996, there were
7,106,149 Shares outstanding, 808,636 Shares were reserved for issuance upon the
exercise of certain  options outstanding  and 491,699 Shares  were reserved  for
issuance upon the exercise of certain warrants to purchase Shares outstanding.
 
ELECTION OF DIRECTORS
 
    The Merger Agreement provides that, promptly upon the purchase by the Merger
Sub  of such  number of  Shares that  represents a  majority of  the outstanding
Shares on a fully diluted basis, the  Parent shall be entitled to designate  the
number  of directors, rounded to the next  whole number, that equals the product
of (i) the total number of directors on the Company's Board of Directors (giving
effect to the election of any  additional directors pursuant to this  provision)
and  (ii) the  percentage (expressed  as a  decimal) that  the number  of Shares
beneficially owned by Parent  bears to the total  number of Shares  outstanding.
The Company will, subject to the provisions of Section 14(f) of the Exchange Act
and  Rule 14f-1 under the Exchange Act,  use all reasonable efforts necessary to
cause the persons designated pursuant to or listed on Schedule 2.6 of the Merger
Agreement to be elected or appointed to the Board of Directors of the Company.
 
    It is  expected that  the Parent  Designees may  assume office  at any  time
following  the purchase by the Parent of a majority of the outstanding Shares on
a fully diluted basis  pursuant to the Offer,  which purchase cannot be  earlier
than  May 15, 1996,  and that, upon  assuming office, the  Parent Designees will
thereafter constitute the entire Board of  Directors of the Company. All of  the
current  directors of  the Company have  indicated their intention  to resign as
directors on the Control Date.

    Biographical  information  concerning  each  of  the  Parent  Designees   is
presented below.
 
PARENT DESIGNEES
 
    The  Parent has informed the Company that  the Parent Designees shall be the
persons set forth  in the following  table. The following  table sets forth  the
name,  age, present principal occupation  or employment and five-year employment
history for  each of  the persons  whom the  Parent has  designated pursuant  to
Schedule  2.6  of the  Merger Agreement  as the  Parent Designees.  The business
address of each such  person is 235  East 42nd Street, New  York, NY 10017,  and
each  such person is a citizen  of the United States, except  P. Nigel Gray is a
citizen of the United Kingdom, and George A. Stewart is a citizen of Canada.
 


                                                                PRESENT PRINCIPAL OCCUPATION
                                                                 OR EMPLOYMENT AND FIVE-YEAR
NAME                             AGE                                 EMPLOYMENT HISTORY
- ---------------------------      ---      -------------------------------------------------------------------------
                                    
P. Nigel Gray                        57   President of Pfizer's Hospital Products Group (July 1995-Present); Vice
                                          President (1994-Present); President of Pfizer's Medical Devices Division
                                          (1993-1995); Executive Vice President of Pfizer's Hospital Products
                                          Division (1993-1995); President of Howmedica International (1992-1993);
                                          and Senior Vice President and General Manager of Howmedica International
                                          (1987-1992).
 
George A. Stewart                    53   President of HPG Acquisition Corp. (January 1996-Present); President of
                                          Pfizer's Medical Devices Division (1995-Present); President, Valleylab,
                                          Inc. (1993-1995); President, Schneider Worldwide (1992-1993); and
                                          President, Shiley Inc. (1991-1992).
 
C. Dean Maglaris                     50   Vice President, Business Planning and Development, of Pfizer's Hospital
                                          Products Group (September 1995-Present); Group Vice President, National
                                          Accounts Operations, of Pfizer's U.S. Pharmaceutical Group (1994-1995);
                                          Vice President, General Manager--National Health Care Operations, of
                                          Pfizer's U.S. Pharmaceutical Group (1992-1994); and Vice President of
                                          Marketing for Pfizer Labs (1987-1992).
 
Dorothy Bonner Burke                 52   Secretary and Vice President of HPG Acquisition Corp. (January
                                          1996-Present); and Assistant General Counsel of Pfizer (1990-Present).
 
William E. Rhodes, III               42   Vice President of HPG Acquisition Corp. (January 1996-Present); Director,
                                          Business Development and Technology, of Pfizer's Hospital Products Group
                                          (1993-Present); President of The William-James Co. Biomedical Consulting
                                          Firm (1983-1993).

 
    The Parent has advised the Company that, to the best of the knowledge of the
Parent, none of the  Parent Designees currently  is a director  of or holds  any
position  with the Company,  and except as  disclosed in the  Offer to Purchase,
none of the  Parent Designees  beneficially owns  any securities  (or rights  to
acquire  any securities) of the Company or has been involved in any transactions
with the Company or any of its directors, executive officers or affiliates  that
are  required to be disclosed pursuant to the rules of the Commission, except as
may be disclosed in the Offer to Purchase.
 
    The Parent has advised the  Company that each of  the persons listed in  the
table  above has consented to  act as a director, and  that none of such persons
has during  the  last  five  years  been  convicted  in  a  criminal  proceeding
(excluding   traffic   violations   and   similar   misdemeanors)   or   was   a
 
                                      I-2

party to a civil  proceeding of a judicial  or administrative body of  competent
jurisdiction  and a result of such proceeding was, or is, subject to a judgment,
decree or final order enjoining future violations of, or prohibiting  activities
subject  to, federal or state  securities laws or finding  any violation of such
laws.
 
THE CURRENT MEMBERS OF THE BOARD AND EXECUTIVE OFFICERS OF THE COMPANY
 
    Currently the Company's entire Board of  Directors is elected at the  Annual
Meeting  of  Shareholders  to  hold  office until  the  next  Annual  Meeting of
Shareholders and until their successors are duly elected and qualified. The name
and age of each current director, the year in which such director first became a
director of the Company, the office held within the Company by such director, if
any, the principal occupation of such  director during the past five years  and,
as  of  June 30,  1995, any  other directorships  held by  such director  in any
company subject to  the reporting  requirements of the  Exchange Act  or in  any
company  registered as an investment company under the Investment Company Act of
1940, as amended, are set forth below:
 


                                                  YEAR FIRST SERVED
               NAME                      AGE        AS A DIRECTOR                   POSITION
- -----------------------------------      ---      -----------------  --------------------------------------
 
                                                            
Norman R. Weldon, Ph.D.                      61            1986      President, Chief Executive
                                                                     Officer and Director
David C. MacGregor, M.D.                     57            1990      Chairman of the Board and Vice
                                                                     President of Medical Research
Richard L. Kronenthal, Ph.D.                 66            1991      Director
Donald L. Murfin                             52            1990      Director
David Nierenberg                             42            1992      Director
Photios T. Paulson                           56            1990      Director
Howard S. Wachtler                           46            1988      Director

 
    NORMAN R.  WELDON, PH.D.,  is a  co-founder  of the  Company, has  been  its
President,  Chief Executive  Officer and a  Director since December  1986 and is
currently Chairman  of  the Nominating  Committee.  Dr. Weldon  has  degrees  in
biochemistry,  industrial management and  economics. He has  been in senior line
management positions  in high  technology  companies for  30 years,  serving  as
President  and Chief Executive Officer of CTS Corporation (1976-1979) and Cordis
Corporation (1979-1987). Dr. Weldon also serves as a director of The New Economy
Fund, Small Cap World Fund, Novoste Corporation and Enable Medical  Corporation,
and is a member of the Advisory Board of The Investment Company of America.
 
    DAVID  C. MACGREGOR, M.D., is a co-founder  of the Company and has served as
Chairman of the Board and Vice President of Medical Research since 1990 and as a
Director since  1987. Dr.  MacGregor has  served  as Chairman  of the  Board  of
Corvita  Canada since June 1991. From 1987 until 1990, Dr. MacGregor was Medical
Director and Vice President of Clinical Research at Cordis Corporation, and from
1981 until  1987,  was  Vice  President for  Medical  Research  at  Cordis.  Dr.
MacGregor  is  a cardiovascular  and thoracic  surgeon.  He first  conceived the
concept for the  Corvita Graft  in 1980 and  has published  over 100  scientific
papers  in  the  medical literature.  Dr.  MacGregor  has been  awarded  20 U.S.
patents, including the basic  patents covering the  mechanical structure of  the
Corvita   Grafts.  Dr.   MacGregor  directs  the   Company's  medically  related
activities, including animal and  clinical trials, product assurance  activities
and  the  medical  interface  with regulatory  agencies.  Dr.  MacGregor devotes
approximately 85% of his time to the performance of Company duties. The  Company
believes that the amount of time that Dr. MacGregor devotes to Company duties is
sufficient  for the  performance thereof.  Dr. MacGregor  is also  a director of
ORTECH Corporation, a not-for-profit research organization.
 
    RICHARD L. KRONENTHAL, PH.D., has been a Director since 1991. Dr. Kronenthal
is a polymer chemist and a  consultant to medical product companies and  venture
capital  groups. Since  1989, Dr.  Kronenthal has  been President  of Kronenthal
Associates, a consulting firm. From 1957 to 1989, he
 
                                      I-3

was employed by Ethicon, Inc. where he was Director of Research and  Development
and  headed a major research project to develop a small diameter vascular graft.
Dr. Kronenthal  is  a  director  of  Lukens  Medical,  and  Direct  Therapeutics
Corporations.  He is also a scientific advisor to Ventures Medical, SEA Ventures
Inc.,  Acusphere,   Inc.,  Merocel   Corporation,  Melanx   Corporation,   Ortec
International and Chitogenics.
 
    DONALD L. MURFIN has been a Director since 1990 and is currently Chairman of
the  Audit Committee.  Mr. Murfin  has been a  general partner  of Chemicals and
Materials Enterprise Associates, Limited Partnership, a venture capital  limited
partnership,  since 1989.  Mr. Murfin was  a General Partner  of Trident Capital
Fund, a venture capital limited partnership, from 1988 to 1989. He is a  polymer
chemist and from 1985 to 1988, was Vice President of The Lubrizol Corporation, a
manufacturer  of specialty chemicals,  and from 1979 to  1988, was President and
Director of Lubrizol  Enterprises, Inc., the  venture development subsidiary  of
Lubrizol.  Mr. Murfin is also a director of Genentech, Inc. He is also a Trustee
of the Edison Biotechnology Center in Cleveland, Ohio.
 
    DAVID NIERENBERG  joined Corvita  as  a Director  in  November 1992  and  is
currently  Chairman of  the Compensation  Committee. Mr.  Nierenberg has  been a
general partner  of Trinity  Ventures  Limited since  1986. Previously,  he  was
associated  with General Electric  Venture Capital and  was a partner  at Bain &
Company, a management  consulting firm.  Mr. Nierenberg  is also  a Director  of
Natus Medical, Eyesys Technologies, and Health Plan Services.
 
    PHOTIOS  (FRED) PAULSON has been a Director since 1990. Mr. Paulson's career
includes 27 years with Becton Dickinson & Company, during which he held  various
executive  positions including those  of President, European  Division and Chief
Operating Officer of the corporation. From 1987 to 1991, Mr. Paulson was  Senior
Advisor,  Health Care Industry, for Prudential Securities, Inc. and from 1991 to
1995, served  as Chairman  of  bioMerieux Vitek,  Inc., a  clinical  diagnostics
company.  Mr. Paulson presently serves as Vice President of bioMerieux Alliance,
a French holding company, and is on the Board of Directors of bioMerieux  Vitek,
Inc. and Novametrics Medical Systems, Inc.
 
    HOWARD  S. WACHTLER has been a Director since 1988 and is currently Chairman
of the  Marketing and  Business  Development Committee.  Mr. Wachtler  has  been
Managing Director of Medical Venture Holdings, Inc., an affiliate of Oppenheimer
&  Co., Inc. and  its predecessor entity  since 1986. Mr.  Wachtler was formerly
Director, Business Planning Development, for Pfizer Hospital Products Group. Mr.
Wachtler is also a director of  Xenova, Ltd., Exocell, Inc., and Gliatech,  Inc.
In  addition, Mr.  Wachtler serves  on the  Board of  Governors of  the Emerging
Company Section of the Biotechnology Industry Organization (BIO).
 
    Except as noted above,  there are no family  relationships among any of  the
Company's  executive  officers  or  directors.  There  are  no  arrangements  or
understandings between any executive  officer and any  other person pursuant  to
which such person was selected as an officer.
 
                                      I-4

                        SECURITY OWNERSHIP OF MANAGEMENT
 
    The following table sets forth as of the close of business on April 4, 1996,
certain  information with respect to the holdings of each director and executive
officer of the Company and  all directors and officers as  a group. Each of  the
persons  listed below has sole voting and  investment power with respect to such
Shares, unless otherwise indicated.
 


                                                                     AMOUNT AND NATURE OF
                                                                     BENEFICIAL OWNERSHIP
                                                              -----------------------------------
NAME OF BENEFICIAL OWNER OR                                                     ACQUIRABLE WITHIN  PERCENT OF CLASS
PERSONS IN GROUP                                              CURRENTLY OWNED      60 DAYS (1)        OUTSTANDING
- ------------------------------------------------------------  ----------------  -----------------  -----------------
                                                                                          
Norman R. Weldon, Ph.D. (2)(3)..............................         489,250            11,326(P)           7.03
Leonard Pinchuk, Ph.D. (2)(4)...............................         110,850           100,250              2.93
David C. MacGregor, M.D. (2)................................         154,539            29,000              2.57
Herbert Kontges, Ph.D.......................................          45,000            67,000              1.58
                                                                                         1,249(P)
Christian L. Mazzola........................................               0           110,000              1.52
Richard L. Kronenthal, Ph.D. (2)............................          12,373             6,875             *
Photios T. Paulson (2)......................................          11,250            10,625             *
                                                                                         4,580(P)
Donald L. Murfin (5) .......................................           1,075             5,000              1.43
  c/o Chemicals & Materials                                                             97,307(P)
  Enterprise Associates
  One Cleveland Center
  Suite 2700
  Cleveland, Ohio 44114
David Nierenberg (6) .......................................         240,987             5,000              3.81
  c/o Trinity Ventures II, L.P.                                                         25,864(P)
  155 Bovet Road, Suite 660
  San Mateo, California 94402
Howard S. Wachtler (7) .....................................         410,765             5,000              6.33
  c/o WestMed Venture Partners, L.P.                                                    36,916(P)
  Oppenheimer Tower
  World Financial Center
  New York, New York 10281
All directors and executive officers as a group
  (13 persons) (8)..........................................       1,476,089           338,750             26.14
                                                                                       177,242(P)

 
- ------------------------
*   Less than 1%
 
(1) Reflects number  of  shares of  Common  Stock acquirable  upon  exercise  of
    options unless followed by a "(P)", in which event reflects number of shares
    issuable  upon  conversion of  Preferred Stock  acquirable upon  exercise of
    warrants.
 
(2) Address is Corvita Corporation, 8210 N.W. 27th Street, Miami, Florida 33122.
 
(3) Includes 9,000 shares of  Common Stock beneficially  owned by Carol  Weldon,
    Dr. Weldon's wife, as to which Dr. Weldon disclaims beneficial ownership.
 
(4) Includes  7,500 shares  of Common  Stock held by  each of  The Rendall Aaron
    Pinchuk Irrevocable Trust, The Bryan Mitchell Pinchuk Irrevocable Trust, and
    The Kerri Jill Pinchuk Irrevocable
 
                                      I-5

    Trust, and  37,500 shares  of Common  Stock  held by  The Diane  F.  Pinchuk
    Revocable Trust (collectively, the "Pinchuk Family Trusts"), as to which Mr.
    Pinchuk disclaims beneficial ownership.
 
(5) Includes 102,307 shares of Common Stock beneficially owned by New Enterprise
    Group,  c/o New Enterprise Associates V,  Limited Partnership, 1119 St. Paul
    Street, Baltimore, MD 21202. Mr. Murfin is a limited partner in NEA Partners
    V Limited Partnership, the  general partner of  New Enterprise Associates  V
    Limited  Partnership, which is  a venture fund of  The New Enterprise Group,
    and disclaims beneficial ownership of these shares.
 
(6) Consists of shares of  Common Stock beneficially  owned by Trinity  Ventures
    II,   L.P.,  Trinity   Ventures  III   and  Trinity   Side-by-Side  I,  L.P.
    (collectively, the "Trinity Group"). Mr. Nierenberg is a general partner  in
    the  limited partnership which serves as a general partner of each member of
    The Trinity Group, and disclaims beneficial ownership of these shares.
 
(7) Consists of 410,765  shares of  Common Stock beneficially  owned by  WestMed
    Venture  Partners, L.P., c/o  Oppenheimer and Co.,  Inc., Oppenheimer Tower,
    World Financial  Center, New  York, NY  10281. Mr.  Wachtler is  a  managing
    director  of Medical Venture Holdings, Inc., which is the general partner of
    WestMed Venture Management, L.P., which  is the managing general partner  of
    WestMed  Venture Partners, L.P. Mr.  Wachtler disclaims beneficial ownership
    of these shares.
 
(8) See notes (5), (6), (7), (8) and (9) above.
 
                                      I-6

                             EXECUTIVE COMPENSATION
 
SUMMARY COMPENSATION TABLE
 
    The following table sets  forth, for the Company's  last three fiscal  years
ended  June 30, the  cash compensation paid  by the Company,  as well as certain
other compensation paid or accrued for  those years, to the Company's  executive
officers.
 


                                                                                                        LONG-TERM
                                                                                                       COMPENSATION
                                                                                                      --------------
                                                                                                          AWARDS
                                                                    ANNUAL COMPENSATION               --------------
                                                        --------------------------------------------   COMMON STOCK
NAME AND                                      FISCAL                                 OTHER ANNUAL       UNDERLYING
PRINCIPAL POSITION                             YEAR     SALARY ($)    BONUS ($)    COMPENSATION ($)    OPTIONS (#)
- -------------------------------------------  ---------  -----------  -----------  ------------------  --------------
                                                                                       
Norman R. Weldon, Ph.D.....................       1995     109,615
  President and Chief                             1994     106,353(1)
  Executive Officer                               1993     104,167
Leonard Pinchuk, Ph.D......................       1995     102,000       30,000                             20,000
  Vice President of Product                       1994      98,388       20,000                             56,250
  Development and Secretary                       1993      95,876       10,000                             15,000
David C. MacGregor, M.D. (2)...............       1995      87,418                                          20,000
  Chairman and Vice President                     1994     101,128
  of Medical Research                             1993     104,167
Herbert Kontges, Ph.D......................       1995     108,667                        11,846(3)         10,000
  Vice President of Endoluminal                   1994      95,236                        10,228(3)         27,000
  Products and Co-Managing                        1993      98,366                         9,717(3)          7,500
  Director, Corvita Europe, S.A.
Christian L. Mazzola (4)...................       1995     102,000                        38,990(5)         35,000
  Vice President of Sales and                     1994      84,375                        10,822(6)         75,000
  Marketing and Co-Managing                       1993      --                                              --
  Director, Corvita Europe, S.A.

 
- ------------------------
(1) Includes $52,500 in accrued salary paid in fiscal year 1995.
 
(2)  Dr. MacGregor became a part-time employee of the Company effective April 1,
    1994 pursuant to which he is paid  at an annualized rate of $105,000,  based
    on  the percentage  of 2,000  hours worked per  annum with  a minimum annual
    salary of $52,000.
 
(3) Consists of car lease payments.
 
(4) Commenced employment with the Company in August 1993.
 
(5) Consists  of $11,846  in car  lease payments  and $27,144  in  non-recurring
    moving expenses.
 
(6) Includes $10,228 in car lease payments.
 
                                      I-7

STOCK OPTION GRANTS
 
    The  following  table  sets  forth  certain  information  concerning options
granted in the  Company's fiscal  year ended June  30, 1995  to the  individuals
named in the Summary Compensation Table:
 
                      OPTION GRANTS IN FISCAL YEAR 1995(1)
 


                                                                                                POTENTIAL REALIZABLE
                                                                                                  VALUE AT ASSUMED
                                                        % OF TOTAL                              ANNUAL RATE OF STOCK
                                        COMMON STOCK     OPTIONS                               PRICE APPRECIATION FOR
                                         UNDERLYING     GRANTED TO    EXERCISEE                     OPTION TERM
                                           OPTIONS     EMPLOYEES IN     PRICE     EXPIRATION   ----------------------
NAME                                     GRANTED (1)     1994 (2)     ($/SHARE)      DATE        5%($)      10%($)
- --------------------------------------  -------------  ------------  -----------  -----------  ---------  -----------
                                                                                        
Leonard Pinchuk.......................       20,000          8.38%    $    4.50      6/21/02   $  36,639  $    85,385
David C. MacGregor....................       20,000          8.38%    $    4.50      6/21/02   $  36,639  $    85,385
Herbert Kontges.......................       10,000          4.19%    $    4.50      6/21/02   $  18,320  $    42,692
Christian L. Mazzola..................       35,000         16.67%    $    4.50      6/21/02   $  64,118  $   149,423

 
- ------------------------
(1) Subject to shareholder approval of the 1995 Option Plan by March 1, 1996.
 
(2) Exercisable  at the  cumulative annual  rate of 25%  of the  total number of
    shares underlying the option commencing one year from the date of grant.
 
STOCK OPTION HOLDINGS
 
    The following table presents the value  of unexercised options held at  June
30, 1995 by the individuals named in the Summary Compensation Table:
 
                         OPTION VALUES AT JUNE 30, 1995
 


                                                                                            VALUE OF UNEXERCISED
                                                                    NUMBER OF UNEXERCISED  IN- THE-MONEY OPTIONS
                                                                           OPTIONS                   AT
                                                                     AT JUNE 30, 1995(#)    JUNE 30, 1995 (1)($)
                                                                       EXERCISABLE(E)          EXERCISABLE(E)
                                                                      UNEXERCISABLE(U)        UNEXERCISABLE(U)
                                                                    ---------------------  ----------------------
                                                                                     
Norman R. Weldon..................................................          9,000(E)               32,250(E)
Leonard Pinchuk...................................................         30,563(E)               74,204(E)
                                                                           49,687(U)               77,109(U)
David C. MacGregor................................................          9,000(E)               32,250(E)
Herbert Kontges...................................................         33,000(E)              101,250(E)
                                                                           24,000(U)               37,500(U)
Christian L. Mazzola..............................................         24,375(E)               60,469(E)
                                                                           50,625(U)              108,281(U)

 
- ------------------------
(1) Values  are calculated  by subtracting the  exercise price  from the closing
    sales price of the Common Stock on June 30, 1995 of $5.25 per share.
 
                                      I-8

                         OWNERSHIP OF VOTING SECURITIES
 
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS
 
    The following table sets forth  as of April 4,  1995, except as a  different
date is noted below, the beneficial ownership of the Common Stock by each person
known  by the Company to be the beneficial owner, as defined in Rule 13d-3 under
the Exchange Act, of five  percent or more of such  Shares. Each of the  persons
listed  below has sole voting and investment  power with respect to such Shares,
unless otherwise indicated.
 


                                                                     AMOUNT AND NATURE OF
                                                                     BENEFICIAL OWNERSHIP
                                                              -----------------------------------
                                                                                ACQUIRABLE WITHIN  PERCENT OF CLASS
NAME AND ADDRESS                                              CURRENTLY OWNED      60 DAYS (1)        OUTSTANDING
- ------------------------------------------------------------  ----------------  -----------------  -----------------
                                                                                          
WestMed Venture Partners, L.P. .............................        410,765               5,000             6.33%
 c/o Oppenheimer and Co., Inc.                                                           36,916(P)
 Oppenheimer Tower
 World Financial Center
 New York, New York 10281
Norman R. Weldon, Ph.D. (2)(3) .............................        489,250              11,326(P)          7.03
Howard S. Wachtler (5) .....................................        410,765               5,000             6.33
 c/o WestMed Venture partners, L.P.                                                      36,916(P)
 Oppenheimer Tower
 World Financial Center
 New York, New York 10281
Montgomery Asset Management, L.P. (6) ......................        496,000                   0             6.98
 600 Montgomery Street
 San Francisco, California 94111
Janus Capital Corporation (7) ..............................        393,000                   0             5.53
 100 Fillmore Street, Suite 300
 Denver, Colorado 80206-4923
Thomas H. Bailey (7) .......................................        393,000                   0             5.53
 c/o Janus Capital Corporation
 100 Fillmore Street, Suite 300
 Denver, Colorado 80206-4923
INVESCO PLC (8) ............................................        517,292                   0             7.28
 11 Devonshire Square
 London EC2M 4YR
 England

 
- ------------------------
 *  Less than 1%
 
(1) Reflects number  of  shares of  Common  Stock acquirable  upon  exercise  of
    options unless followed by a "(P)", in which event reflects number of shares
    issuable  upon  conversion of  Preferred Stock  acquirable upon  exercise of
    warrants.
 
(2) Address is Corvita Corporation, 8210 N.W. 27th Street, Miami, Florida 33122.
 
(3) Includes 9,000 shares of  Common Stock beneficially  owned by Carol  Weldon,
    Dr. Weldon's wife, as to which Dr. Weldon disclaims beneficial ownership.
 
(4) Consists  of  885,074  shares  of Common  Stock  beneficially  owned  by New
    Enterprise Group. Mr. Murfin is a limited partner in NEA Partners V  Limited
    Partnership,  the  general partner  of New  Enterprise Associates  V Limited
    Partnership, which  is a  venture  fund of  The  New Enterprise  Group,  and
    disclaims beneficial ownership of these shares.
 
                                      I-9

(5) Consists  of 410,765  shares of Common  Stock beneficially  owned by WestMed
    Venture Partners,  L.P., Mr.  Wachtler  is a  managing director  of  Medical
    Venture  Holdings, Inc.,  which is  the general  partner of  WestMed Venture
    Management, L.P., which is the  managing general partner of WestMed  Venture
    Partners, L.P. Mr. Wachtler disclaims beneficial ownership of these shares.
 
(6) Consists  of  496,000  shares  of Common  Stock  beneficially  owned,  as of
    December 31, 1995, by Montgomery  Asset Management, L.P. ("Montgomery"),  an
    Investment  Advisor registered under section  203 of the Investment Advisors
    Act of 1940. Information is from Schedule  13G filed by such owner with  the
    Securities  and Exchange Commission and dated  January 29, 1996. The Company
    has no information concerning ownership by  Montgomery on April 4, 1996,  or
    at  any time other  than as of December  31, 1995. As  of December 31, 1995,
    Montgomery reported beneficial ownership of 6.99% of the Common Stock.
 
(7) Consists of 393,900 shares of Common Stock held, as of February 13, 1996, by
    investment companies and individual and institutional clients to which Janus
    Capital Corporation ("Janus Capital") furnishes investment advice, which may
    be deemed to be beneficially owned by Janus Capital and which may be  deemed
    to  be beneficially owned by Thomas  H. Bailey ("Mr. Bailey"). Janus Capital
    is an  Investment Advisor  registered under  section 203  of the  Investment
    Advisors  Act of 1940. Mr. Bailey  owns approximately 12.2% of Janus Capital
    and serves as its President and Chairman of the Board. Voting and investment
    power with respect to  such shares is shared  by the foregoing persons.  Mr.
    Bailey  disclaims beneficial ownership of  these shares. Information is from
    Schedule 13G jointly filed by such  owners with the Securities and  Exchange
    Commission  and  dated February  13, 1996.  The  Company has  no information
    concerning ownership by Janus Capital and Mr. Bailey on April 4, 1996, or at
    any time other than as of February 13, 1995. As of February 13, 1995,  Janus
    Capital  and Mr. Bailey reported beneficial  ownership of 5.6% of the Common
    Stock.
 
(8) Consists of 517,292 shares of Common Stock held, as of February 14, 1996, by
    persons to which INVESCO Funds Group, Inc. furnishes investment advice. Such
    shares may be beneficially owned by INVESCO Funds Group, inc., an Investment
    Advisor registered under Section 203 of the Investment Advisor Act of  1940;
    INVESCO  North American Holdings, Inc., a holding company in accordance with
    Rule 13d-1(b)(ii)(G)  under  the  Securities Exchange  Act  of  1934  ("Rule
    13d-1(b)(ii)(G)");  INVESCO, Inc., a holding company in accordance with Rule
    13d-1(b)(ii)(G), and INVESCO  PLC, a  parent holding  company under  section
    240.13d-1(b)(ii)(G). Voting and investment power with respect to such shares
    is  shared  by  the foregoing  entities.  Information is  from  Schedule 13G
    jointly filed by such entities  with the Securities and Exchange  Commission
    and  dated  February 14,  1996. The  Company  has no  information concerning
    ownership by such entities on April 4, 1996, or at any time other than as of
    February 14, 1996. As of February 14, 1996, the foregoing entities  reported
    their beneficial ownership as 7.4% of the Common Stock.
 
COMMITTEES OF THE BOARD OF DIRECTORS
 
    The  Audit  Committee, comprised  of  two independent  directors,  Donald L.
Murfin (Chairman)  and  Fred  T.  Paulson,  and  one  employee  director,  David
MacGregor,  meets with the Company's independent auditors to review the scope of
their annual audit, the adequacy of  the Company's system of internal  controls,
and  the sufficiency  of its financial  reporting. The Audit  Committee held one
meeting during fiscal year 1995.
 
    The Compensation Committee, comprised of three independent directors,  David
Nierenberg  (Chairman), Donald L. Murfin  and Richard L. Kronenthal, establishes
the compensation program for  Norman R. Weldon,  Ph.D., the Company's  President
(Chief  Executive  Officer),  recommends to  the  Board of  Directors  a general
compensation program for all officers  and administers the Corvita stock  option
plans. The Compensation Committee held two meetings during fiscal year 1995.
 
                                      I-10

    The Business Development Committee, comprised of four independent directors,
Howard  S.  Wachtler (Chairman),  Richard  L. Kronenthal,  David  Nierenberg and
Donald L. Murfin,  makes recommendations  to the Board  of Directors  as to  new
business  opportunities and strategies. The  Business Development Committee held
three meetings during fiscal year 1995.
 
    The Nominating  Committee, comprised  of one  employee director,  Norman  R.
Weldon  (Chairman), and two independent directors, Fred T. Paulson and Howard S.
Wachtler, nominates  individuals  to  serve  on  the  Board  of  Directors.  The
Nominating Committee held two meetings during fiscal year 1995.
 
MEETINGS OF THE BOARD OF DIRECTORS
 
    During the Company's fiscal year ended June 30, 1995, its Board of Directors
held nine meetings.
 
COMPENSATION OF DIRECTORS
 
    All directors who are not employees of the Company receive a fee of $500 for
each meeting of the Board of Directors attended, plus reimbursement of expenses,
and  an additional  $100 for  each committee  meeting attended  after January 1,
1995.
 
    Under the Company's 1995 Non-Employee Director Stock Option Plan (the  "1995
Director   Plan"),  non-management  Directors  each   were  granted  an  initial
non-qualified option to purchase 5,000  Shares upon shareholder approval of  the
1995  Director Plan. Each  such option was  granted at an  exercise equal to the
fair market value of the Common Stock  on the date of grant, is exercisable  one
year  after the date  of grant, and will  terminate ten years  after the date of
grant, or thirty days after the earlier termination of service to the Company by
the non-management Director (except in the case that termination of service as a
director is due to death or permanent disability, in which case the option  will
be immediately exercisable in full and will expire one year after termination of
the  director's service). No  other option grant  may be made  under the Plan to
non-management Directors.
 
    As part  of its  functions,  the Compensation  Committee determines,  on  an
annual  basis, the compensation to be paid  to the Company's President and Chief
Executive Officer  and to  the  other executive  officers  of the  Company.  The
Committee  has established a  number of objectives which  serve as guidelines in
making its compensation decisions, including:
 
    - Providing a  competitive  total  compensation package  which  enables  the
      Company  to  attract  and  retain,  on  a  long-term  basis,  high-caliber
      executive personnel;
 
    - Integrating  compensation  programs  with  the  Company's  short-term  and
      long-term strategic plan and business objectives; and
 
    - Encouraging   achievement  of  business   objectives  and  enhancement  of
      shareholder value by  providing executive  management long-term  incentive
      through equity ownership.
 
    The  Company has been  engaged primarily in research  and development of new
medical devices and  related biomaterials for  treatment of late-stage  vascular
disease,  and  revenues to  date  have been  minimal. As  a  result, the  use of
traditional performance  standards, such  as  corporate profitability,  are  not
believed  to be appropriate in  evaluating of the performance  of the Company or
its individual executives. The compensation of the Company's executive  officers
is  based, in  substantial part,  on the  achievement of  individual and overall
corporate objectives. Such objectives are  established at the beginning of  each
calendar  year and modified as necessary to reflect changes in market conditions
and other factors. Individual and  overall corporate performance is measured  by
reviewing whether these corporate objectives have been achieved.
 
    Executive  compensation  consists of  base salary  and participation  in the
Company's stock option plans, established in October 1988 and in February  1995.
In  addition, the Company has established a bonus pool from which bonuses may be
paid to  executives  and  other  eligible  employees  who  have  exceeded  their
performance  objectives during the year. To reflect the development stage of the
 
                                      I-11

Company and its  financial loss position,  with growth expected  in the  future,
executives  are  paid salaries  at lower  than prevailing  rates in  the medical
device industry but receive higher levels  of stock options and/or cash  bonuses
paid on performance.
 
                                          THE COMPENSATION COMMITTEE
 
                                          David Nierenberg
                                          Donald L. Murfin
                                          Richard L. Kronenthal, Ph.D.
 
CERTAIN TRANSACTIONS; OTHER MATTERS
SECTION 16 DISCLOSURE
 
    Section 16 of the Securities Exchange Act of 1934, as amended, requires that
officers, directors and holders of more than 10% of the Common Stock ("Reporting
Persons")  file reports of  their trading in Company  equity securities with the
Securities and Exchange Commission. Based on a review of Section 16 forms  filed
by  the Reporting Persons during the last fiscal year, the Company believes that
the  Reporting  Persons   complied  with  all   applicable  Section  16   filing
requirements.
 
                                      I-12

STOCK PERFORMANCE GRAPH
 
    The  following graph sets  forth the cumulative  total shareholder return to
the Company's shareholders from  October 25, 1994 (the  date the Company  became
subject to the reporting requirements of the Securities Exchange Act of 1934, as
amended)  through June 30, 1995,  as well as an  overall stock market index (The
Nasdaq Stock Market --  U.S. Companies) and  the Company's self-determined  peer
group (1):
 
                                [GRAPH]
 
- ------------------------
(1) The  self-determined peer group consists of the following medical and dental
    instrument supply  companies  which have  become  subject to  the  reporting
    requirements  of the Securities Exchange Act of 1934, as amended, within the
    past twelve months:  Circon Corp.,  Hemasure Inc.,  Innerdyne Inc.,  Misonix
    Inc.,   Fluoroscan   Imaging   Systems  Inc.,   Incontrol   Inc.,  Interlobe
    International and Optex  Biomedical Inc. The  Company anticipates using  SIC
    Group  3840 (surgical, medical  and dental instruments  and supplies) as its
    standard peer group index in future years.
 
                                      I-13

                                 EXHIBIT INDEX
 


EXHIBIT NO.
- -----------
          
 Exhibit 1   Agreement and Plan of Merger, dated as of April 11, 1996, among Corvita Corporation, Pfizer Inc., and
             HPG Acquisition Corp.
 Exhibit 2   Shareholders  Agreement, dated as  of April 11, 1996,  among Pfizer Inc.,  HPG Acquisition Corp., and
             certain stockholders named herein, and including Schedule 1 thereto.
 Exhibit 3   Confidentiality and Standstill Agreement, dated August 16,  1995, between Dillon, Read & Co. Inc.  on
             behalf of Corvita Corporation and Pfizer Inc.
 Exhibit 4   Stock  Purchase Agreement, dated as of April 11, 1996, among Corvita Corporation and George A. Adams,
             David C. MacGregor, Gregory J. Wilson and Jennie M. Wilson as trustees for the Gregory Wilson  Family
             Trust, and Jennie M. Wilson.
 Exhibit 5   Stock  Purchase  Agreement, dated  as of  April 11,  1996, between  Corvita Corporation  and Research
             Visions Canada, Inc.
 Exhibit 6   Loan Agreement, dated April 11, 1996, between Pfizer Inc. and Corvita Corporation; Promissory Note of
             Convita Corporation, dated  April 11,  1996; and  License Agreement,  dated April  11, 1996,  between
             Corvita Corporation and Pfizer Inc.
 Exhibit 7   Letter to Shareholders of Corvita Corporation, dated April 17, 1996.*
 Exhibit 8   Press Release, dated April 11, 1996, issued by Pfizer Inc. and Corvita Corporation.
 Exhibit 9   Opinion of Dillon, Read & Co. Inc., dated April 11, 1996, and Consent by Dillon Read to the inclusion
             of the Opinion as an Exhibit, dated April 16, 1996.

 
- ------------------------
* Included in copies of the Schedule 14D-9 mailed to stockholders.