MEDAREX INC
8-K, 1999-08-11
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>

    As filed with the Securities and Exchange Commission on August 11, 1999.


                       SECURITIES AND EXCHANGE COMMISSION

                              Washington, DC 20549

                                    FORM 8-K

                                 CURRENT REPORT



                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


                Date of Report (Date of earliest event reported)
                       August 11, 1999 (February 25, 1999)



                                  MEDAREX, INC.
             (Exact name of registrant as specified in its charter)


         New Jersey                 0-19312           22-2822175
 (State of other jurisdiction    (Commission          (IRS Employer
        of incorporation)        File Number)         Identification No.)



              1545 Route 22 East, Annandale, New Jersey 08801-0953
                    (Address of Principal Executive Offices)

       Registrant's telephone number, including area code: (908) 713-6001


                                 Not Applicable
          (Former name or former address, if changed since last report)
<PAGE>

                               TABLE OF CONTENTS
                                      FOR
                          CURRENT REPORT ON FORM 8-K



Item 5.           Other Events.................................................3

Item 7.           Financial Statements and Exhibits............................4

Signature         .............................................................5

                                      -2-
<PAGE>

            Item 5.  Other Events.

         This Current Report Form 8-K is being submitted in order to file
certain material contracts entered into by Medarex, Inc. ("Medarex) in
connection with the formation of Genmab A/S, a Danish private limited company
("
Genmab"), organized by Medarex, Bank Foreningernes Erhvervsudviklingsforening
BankInvest, Biomedicinsk Udvikling, a Danish association ("BankInvest") , and
certain other investors, and the license of certain of Medarex's technology to
Genmab.

                                      -3-
<PAGE>

   Item 7.  Financial Statements and Exhibits.

         (c) Exhibits. The following materials are filed as exhibits to this
Current Report on Form 8-K:

Exhibit
Number     Description of Exhibit
- ------     ----------------------

10.80      Shareholders Agreement dated February 25, 1999 among Medarex,
           GenPharm International, Inc., BankInvest, BI Asset Management
           Fondsmaeglerselskab A/S, and certain other investors.

10.81      Evaluation and Commercialization Agreement dated as of February 25,
           1999 among Medarex, GenPharm International, Inc. and Genmab.

                                      -4-
<PAGE>

                                    SIGNATURE


         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                              MEDAREX, INC.
                                              Registrant


Date: August 4, 1999                  By: /s/ Donald L. Drakeman
                                          ------------------------------------
                                              Donald L. Drakeman
                                              President, Chief Executive Officer
                                              and Director

                                      -5-
<PAGE>

                                  EXHIBIT INDEX


<TABLE>
<CAPTION>
EXHIBIT                                                                                  PAGE
NUMBER                          DESCRIPTION                                              NUMBER
- ------                          ------------                                             ------
<S>      <C>                                                                           <C>
10.80     Shareholders Agreement dated February 25, 1999 among Medarex, Inc.,
          GenPharm International, Inc., BankInvest, BI Asset Management
          Fondsmaeglerselskab A/S and certain other investors

10.81     Evaluation and Commercialization Agreement dated as of February 25,
          1999 among Medarex, Inc., GenPharm International, Inc. and Genmab.
</TABLE>

                                      -6-

<PAGE>

                                                                   Exhibit 10.80



                            SHAREHOLDERS AGREEMENT
                                     among
                                 Medarex Inc.

                         GenPharm International, Inc.

            Bankforeningernes Erhvervsudviklingsforening BankInvest
                            Biomedicinsk Udvikling

                  BI Asset Management Fondsmgalerselskab A/S

                                     *****


____________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.
<PAGE>

                   S H A R E H O L D E R S A G R E E M E N T


This Shareholders Agreement (the "Agreement") is made as of February 25, 1999 by
and among


                                  Medarex, Inc.
                               1545 Route 22 East
                                  P.O. Box 953
                                    Annandale
                                  NJ 08801-0953
                                       USA
        a corporation organised under the laws of the State of New Jersey


                          GenPharm International, Inc.
                                 2350 Qume Drive
                                    San Jose
                                    CA 95131
                                       USA
        a corporation organised under the laws of the State of California
                                  ("GenPharm")

             Bankforeningernes Erhvervsudviklingsforening BankInvest
                             Biomedicinsk Udvikling
                                 33 Toldbodgade
                              DK-1022 Copenhagen K
                                     Denmark
        an association organised under the laws of the Kingdom of Denmark
                                 ("BankInvest")


                   BI Asset Management Fondsmaglerselskab A/S
                                 33 Toldbodgade
                              DK-1022 Copenhagen K
                                     Denmark
      a limited company organised under the laws of the Kingdom of Denmark
                                    ("BIAM")
<PAGE>

                                      *****

  (each referred to as a "Party" and collectively referred to as the "Parties")

with respect to the shares of GFKJUS 519 ApS under change of name to Genmab ApS,
a Danish private limited company organised under the laws of the Kingdom of
Denmark and registered in the Danish Commerce and Companies Agency under
registration no. ApS 248.498 (the "Company"),

WHEREAS

A.   GenPharm, which is a wholly owned subsidiary of Medarex, and Medarex
     (GenPharm and Medarex together "Medarex") are the proprietary holders of
     certain US patents, technology and know-how and GenPharm and Medarex have
     on the even date hereof entered into a licence agreement (named Evaluation
     and Commercialization Agreement) by and between GenPharm and Medarex as
     licensor and the Company as licensee (the "Licence Agreement") granting the
     Company a licence to utilise the proprietary rights for the purposes
     stipulated in the Licence Agreement; the Licence Agreement is attached
     hereto as EXHIBIT 1;

B.   the Parties agree that the licence granted by GenPharm and Medarex under
     the Licence Agreement has an estimated value of ***** with an additional
     ***** per target valuation added when Genmab exercises its options for each
     of ***** additional targets;

C.   BankInvest wishes to participate in the improvement and development of the
     technology granted under the Licence Agreement;

D.   Medarex and BankInvest have accordingly agreed to create a joint venture
     which shall be carried out through the Company for the purposes referred to
     in recital A and otherwise for the purposes and on the terms set out in
     this Agreement;

E.   the Company shall be capitalised by non-capital contribution by
     GenPharm/Medarex of the Licence Agreement and by an initial aggregate
     contribution in cash of ***** by BankInvest;

F.   once contribution by GenPharm/Medarex of the License Agreement and by
     BankInvest of ***** in cash have been completed, *****

G.   at any time prior to the expiration of ninety (90) days from the date of
     this Agreement, *****. The Parties including the third party investors are
     hereinafter sometimes collectively referred to herein as the
     "Shareholders".


***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.



                                       2
<PAGE>

NOW THEREFORE IT IS HEREBY AGREED AS FOLLOWS:

1.0  Interpretation
- ---  --------------------

1.1  Unless the context requires otherwise, words reporting in the singular
     shall include the plural and vice versa.

1.2  In the event of any ambiguity or conflict arising between a clause of this
     Agreement and any schedule, the former shall
     prevail.

1.3  The headings used throughout this Agreement are inserted for reference
     purposes only and are not to be considered or taken into account in
     construing the terms and provisions of any paragraph nor to be deemed in
     any way to qualify, modify or explain the effects of any such provisions or
     terms.

1.4  Unless the context requires otherwise, a reference herein to any clause or
     schedules is a reference to a clause or a schedule contained in or annexed
     to this Agreement.

1.5  Reference herein to any statute or statutory provision includes a reference
     to that statute or statutory provision as from time to time amended,
     extended or re-enacted.

2.0  The Company
- ---  -----------

2.1  The name of the Company shall be Genmab ApS.

2.2  The nominal share capital of the Company amounts to DKK 125,000 (Danish
     Kroner one hundred and twenty-five thousand 00/100), which share capital
     has been registered and fully paid up. The Company is currently a wholly
     owned subsidiary of Medarex.

2.3  The Company was purchased by Medarex as a pre-registered Company on 13
     November 1998 and had as such not engaged in any activities until the
     purchase. Since Medarex' purchase of the Company, the Company has not
     engaged in any activities other than preparatory activities relating to the
     joint venture operations contemplated by this Agreement.




                                       3
<PAGE>

2.4  *****. The current articles of association are attached as EXHIBIT 3 to
     this Agreement and a compiled summary issued by the Danish Commerce and
     Companies Agency on 11 December 1998 is attached as EXHIBIT 4.
                                                         ---------

2.5  The objectives of the Company are to engage in medical research, production
     and sale of medical products as well as other business related thereto in
     the opinion of the general meeting.


3.0  Capitalisation of the Company and Subscription of Shares
- ---  --------------------------------------------------------

3.1  The shares of the Company shall be divided into three share classes: A , B
     and C. The class A and class B shares shall have special rights in case of
     winding up of the Company as described in clause 4.5 and the Class B shares
     shall have special rights upon increase of the share capital as described
     in clause 4.4. The shares of Medarex shall belong to class A. The shares of
     the Investors shall belong to class B. Class C is the ordinary class of
     shares and the shares of the Key Employees shall belong to this class.

     Save the special rights in case of winding up of the Company and upon
     increase of the Company's share capital, the class A shares, the class B
     shares and the class C shares shall have equal rights in the Company. All
     shares shall carry equal voting rights. The shares shall be non-negotiable
     and shall be noted by name in the Company's share ledger.

3.2  Prior to signing of this Agreement, the nominal DKK 125,000 shares
     currently held by Medarex shall be divided into class A, B and C of which
     nominal ***** shall belong to class A, nominal ***** shall belong to class
     B and nominal ***** shares shall belong to class C.

     Upon the execution and delivery of this Agreement, Medarex shall sell
     nominal ***** shares of class B shares to BIAM, nominal ***** shares of
     class B shares to BankInvest and nominal ***** shares of class C shares to
     the Key Employees. The shareholdings of each Key Employee shall be as
     agreed
____________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.


                                       4
<PAGE>

     in EXHIBIT 5 hereto. *****. Once such sale of shares has been completed,
     the shareholdings of the Parties shall be as follows:


     Medarex                      *****                  *****
     BankInvest                   *****                  *****
     Key Employees                *****                  *****
     BIAM                         *****                  *****
                                  *****                  *****

3.3  Immediately following the completion of the sale of shares as described in
     clause 3.2, the Company shall be capitalised by non-capital contribution
     from Medarex (and its subsidiary GenPharm) of the Licence Agreement and by
     capital contribution by BankInvest of *****. The contribution shall be made
     against subscription of new shares and the contribution of ***** shall
     entitle each contributor to nominal ***** shares equivalent to a
     subscription price of ***** per share of nominal ***** (for an average
     subscription price of ***** per share of nominal *****, based on a total of
     ***** shares issued to each of BankInvest and Medarex). The subscription by
     Medarex shall be in new class A shares against contribution of the Licence
     Agreement valued by Ernst & Young to ***** in their valuation report of
     February 25, 1999. BankInvest shall subscribe nominal ***** new class B
     shares by an initial contribution of ***** in cash (for an average
     subscription price of ***** per share of nominal *****, based on a total of
     ***** shares issued). Once the subscription of new shares has been
     effected, the Parties shareholdings in the Company shall be as follows

     Medarex                      *****                  *****
                                  *****                  *****
                                  *****                  *****
                                  *****                  *****
                                  *****                  *****

3.4  *****.

3.5  In addition to the initial distribution of the share capital of the Company
     as set forth in Clause 3.3 above, upon exercise by the Company of its
     option under the License Agreement to receive licenses to up to *****
     additional targets, Medarex shall receive for each such licensed target
     *****. 1.1

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.


                                       5
<PAGE>

4.0  The Shares of the Company
- ---  -------------------------

41.  Restriction on Transfer of Shareholders' Shares; First Offer

     (i)  No Shareholder shall sell, assign or otherwise transfer any of its
          shares except as permitted by this Agreement.

     (ii) Except as set forth herein, if any Shareholder (the "Selling
          Shareholder") proposes to offer and sell any of its shares (other than
          any sale of such shares as part of a proposed registered public
          offering), it shall offer such shares (the "Offered Shares") (i)
          firstly to the other Shareholders holding shares within the same class
          as the Offered Shares (ii) secondly to the Shareholders of class A (if
          the Offered Shares belong to class B or class C) or class B (if the
          Offered Shares belong to class A or represent remaining class C shares
          not purchased by class C or class A shareholders) and (iii) thirdly to
          the Shareholders holding class C shares, pursuant to a written notice
          (the "Transfer Notice") specifying the number of Offered Shares and
          the proposed price and terms of sale. No Shareholder shall give such a
          Transfer Notice unless such Shareholder has obtained a bona fide
          written offer to purchase the Offered Shares from an unaffiliated
          third party at arms-length. The Selling Shareholder shall attach to
          the Transfer Notice a true copy of the written offer setting forth all
          the terms of the proposed purchase, including the names and address of
          the purchaser or purchasers and the written agreement of such
          purchaser or purchasers that they will be bound by the terms and
          conditions of this Agreement. The other Shareholders shall have the
          prior right to purchase all (but not less than all) of the Offered
          Shares at such price and upon such terms. In such instance, the
          Shareholders shall have thirty (30) days to exercise their right of
          first offer. If more than one Shareholder desires to purchase the
          Offered Shares, the shares shall be purchased in accordance with the
          aforementioned ranking of the pre-emptive rights. If two or more
          Shareholders whose pre-emptive rights are ranking equally desires to
          purchase the Offered Shares, each Shareholder within the same ranking
          desiring to purchase such Offered Shares ("Accepting Shareholder")
          shall have the right to purchase its proportionate share of the
          Offered Shares. For purposes of the Agreement, "proportionate share"
          shall mean a fraction the numerator of which shall be the number of
          shares owned by the Accepting Shareholder and the denominator of which
          shall be the number of shares owned by all the Accepting Shareholders.
          If the other Shareholders fail to exercise their right of first offer,
          then

                                       6

<PAGE>

          the Selling Shareholders will be free to offer and sell the Offered
          Shares for a period of three (3) months upon the terms and conditions
          specified in the Transfer Notice or on negotiated terms which are less
          favourable to the offeree(s) than the terms and conditions set forth
          in such Transfer Notice. The completion of such offer and sale or the
          failure to complete such offer and sale of such shares within such
          three (3) months, or any change in the terms and conditions of the
          proposed offer and sale set forth in the Transfer Notice which is more
          favourable to the offeree(s) of the Offered Shares, shall retrigger
          the right of first offer of the other Shareholders requiring a new
          Transfer Notice to the other Shareholders, recommencing the relevant
          time periods, with respect to any further sale of the Offered Shares
          by the Selling Shareholders (including the sale of the Offered Shares
          pursuant to such revised, favourable terms). Payment for the Offered
          Shares shall be made in the manner provided in clause 4.2. Whether or
          not the Offered Shares are purchased as hereinabove provided, they
          shall remain subject to the provisions of this Agreement.

   (iii)  The provisions of clause 4.1 (i) and (ii) shall not apply to any
          proposed transfer of shares by a Shareholder to a Related Party,
          provided that any such transferee shall first become a party to this
          Agreement and agree to become bound by the provisions hereof. For the
          purpose of this Agreement "Related Party" shall mean any corporation
          or other entity which is directly or indirectly controlling,
          controlled by or under the common control with a shareholder. The term
          "control" shall mean the direct or indirect ownership of fifty percent
          (50%) or more of the outstanding shares or other voting rights of the
          subject entity to elect directors, or if not meeting the preceding,
          any entity owned or controlled by or owning or controlling at the
          maximum control or ownership right permitted in the country where such
          entity exists.

   (iv)   In addition, the foregoing provisions of clause 4.1 (i) and (ii) shall
          not apply in the event Medarex and the Investors shall agree to sell
          all of their shares to an unrelated third party (an "Acquisition"). In
          such event, the remaining Shareholders hereby agree to sell all of
          their shares to such unrelated third party in the Acquisition for the
          same consideration and upon the same terms and conditions as received
          by Medarex and the Investors in the Acquisition.

   (v)    In the event that Medarex and the Investors shall agree to sell or
          otherwise transfer a "controlling interest" in the Company (a "Change
          of Control"), to an unrelated third party, the remaining Shareholders
          shall have the right to have their shares purchased by such


                                       7
<PAGE>

          unrelated third party for the same consideration and upon the same
          terms and conditions as received by Medarex and the Investors ( the
          "Put Option"). Any such unrelated third party by agreeing to purchase
          such controlling interest hereby agrees to purchase the shares of any
          remaining Shareholder who exercises such Put Option. For the purposes
          of this clause 4.1(v) the term "controlling interest" shall mean the
          direct or indirect ownership of fifty-one percent (51%) of the
          outstanding shares or other voting rights to elect directors as of the
          date of any transaction which results in a Change of Control. The
          foregoing provisions of clause 4.1 (i) and (ii) shall not apply to the
          sale of shares by a Shareholder pursuant to the exercise of the Put
          Option.

   (vi)   Anything herein to the contrary notwithstanding, any proposed transfer
          of shares by a Shareholder in violation of the provisions of this
          clause 4.1 or of any applicable law then in effect shall be null and
          void and the Company shall not record any such transfer in its share
          ledger records.

4.2 Exercise of Option by Shareholder

     If any Shareholder exercises its right to purchase shares pursuant to the
     provisions of 4.1(i) above, payment therefor and delivery of such shares
     shall be made in the following manner:

     (i)  Within seven (7) days after the purchaser exercises his right to
          purchase, the Selling Shareholder shall give to the purchaser not less
          than five (5) days nor more than ten (10) days' notice by registered
          mail of his or its intention to deposit the share certificates
          representing the shares to be sold with counsel mutually agreeable to
          purchaser and the Selling Shareholder (or in the absence of such
          agreement with the Company's then general legal counsel, acting as
          escrow agent (the "Escrow Agent"). The Selling Shareholder shall
          specify also the time and place of the contemplated deposit and the
          purchase price to be paid for the shares by the purchaser.

     (ii) The Selling Shareholder shall deposit the share certificates
          representing the shares to be sold with the Escrow Agent at the time
          and place specified in such notice. The share certificates shall be
          duly endorsed in blank for transfer, and shall be accompanied by all
          other documents necessary for an effective transfer. The Selling
          Shareholder shall deposit with the Escrow Agent sufficient funds to
          pay for any transfer stamps or tax. Upon receipt of the share


                                       8
<PAGE>

          certificates from the Selling Shareholder, the Escrow Agent shall send
          written notice thereof to the purchaser.

    (iii) Within thirty (30) days after the deposit of the share certificates by
          the Selling Shareholder with the Escrow Agent, the purchaser shall
          deposit cash with the Escrow Agent in an amount equal in value to the
          purchase price of such shares as provided in clause 4.1(i) .

    (iv)  The Escrow Agent shall upon receipt of the deposit of the purchase sum
          notify the Selling Shareholder of the deposit, whereupon the Selling
          Shareholder within seven (7) days shall request the Company to make a
          note of the transfer in the Company's share ledger. The Company shall
          forward a certified copy of the Company's share ledger with the note
          of transfer to the Escrow Agent and the Selling Shareholder.

    (v)   Upon receipt by the Escrow Agent of a certified copy of the Company's
          share ledger containing a duly registration of the transfer, the
          Escrow Agent shall deliver all such share certificates to the
          purchaser with all necessary tax transfer stamps thereon duly affixed
          and canceled, as well as other documents received with respect to the
          transfer of such shares. Simultaneously therewith, the Escrow Agent
          shall pay over the purchase price to the Selling Shareholder.

    (vi)  The fees and all other expenses of the Escrow Agent shall be paid
          one-half by the Selling Shareholder and one-half by the purchaser.

    (vii) Until the delivery of the share certificates to the purchaser and the
          payment of the purchase price to the Selling Shareholder, the
          -Purchaser shall be deemed the owner of such shares and shall be
          entitled to all of the rights of a shareholder of such shares
          including, but not limited to, the right to vote such shares at all
          meetings of shareholders and the right to receive any dividends
          declared and paid with respect to such shares.

   (viii) The Company agrees that it will not at any time permit any transfer to
          be made on its books or records of the certificates representing
          shares of the Company owned by any of the Shareholders unless such
          transfer is made pursuant to and is in accordance with the terms and
          conditions of this Agreement.



                                       9
<PAGE>

4.3       Restriction on Assignment of Shares
- ---       -----------------------------------

          None of the Parties shall in any way assign, transfer or have their
          shares transferred in any way other than by transfer of ownership in
          accordance with the terms of this Agreement including by pledge,
          charge, lien, restriction, creditors proceedings or otherwise.

4.4       *****
- ---

4.4.1     *****.

4.4.2     *****.

4.4.3     *****.


4.5       Winding Up of the Company

4.5.1     *****.

4.5.2     *****.

4.5.3     *****.

4.5.4     *****.

4.5.5     The Shareholders owning at least ***** of the total share capital
          shall have the right, at any time, to claim that a Liquidation Event
          has occurred and is continuing and may demand that the Company be
          liquidated (a "Liquidation Demand"). Such Shareholders shall notify
          the Board of Directors and each Shareholder of such Liquidation
          Demand. If the holders of ***** or more of the share capital determine
          that a Liquidating Event shall not have occurred, then the Company
          shall not be liquidated

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.



                                      10
<PAGE>

          and shall continue its operations in accordance with the terms of this
          Agreement. If the holders of less than *****, but more than *****, of
          the share capital determine that no Liquidating Event shall have
          occurred then the determination of whether a Liquidating Event exists
          shall be submitted to arbitration pursuant to the provisions of clause
          17.2 below with the burden of proof resting with the Shareholders
          making such Liquidation Demand. If the arbitrators determine that a
          Liquidating Event shall have occurred then the Company shall be
          liquidated in accordance with the provisions of clauses 4.5.1, 4.5.3
          and 4.5.4 above, otherwise the Company shall continue its operations
          in accordance with the terms of this Agreement.

4.6       Warrants


4.6.1     The board of directors is hereby authorised to issue warrants to new
          employees, directors and consultants for nominal DKK for the purchase
          of up to ***** class C shares on terms and conditions as shall be
          determined by the board. The authorisation shall be implemented in
          the Company's articles of association.

4.7       Termination of Employment

4.7.1     If a Key Employee's employment with the Company is terminated prior to
          1 January 2000, the Key Employee shall sell seventy-five percent (75%)
          of his shares to the other Shareholders in accordance with clause 4.1
          hereof. If employment is terminated on or after 1 January 2000 but
          prior to 1 January 2001, the Key Employee shall sell fifty percent
          (50%) of his shares to the other Shareholders. If employment is
          terminated on or after 1 January 2001 but prior to 1 January 2003 the
          Key Employee shall sell twenty-five percent (25%) of his shares to the
          other Shareholders. After 1 January 2003 the Key Employee shall not be
          obligated to sell any of his shares to the other Shareholders.

4.7.2     The purchase price for the shares sold according to clause 4.7.1.
          shall be the nominal value per share paid by such Key Employee
          pursuant to clause 3.2 hereof.

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.


                                      11
<PAGE>

4.7.3     *****.

4.8       Warning of Third Party

4.8.1     The Parties acknowledge and agree that a note of this Agreement shall
          be made in the Company's share ledger to disclose that the
          shareholders have concluded this Agreement which imposes certain
          restrictions on the shareholders' rights in the Company including
          provisions on pre-emptive rights.

4.8.2     If at any time it is decided to issue share certificates in respect of
          the shares in the Company, the Parties agree and acknowledge that
          their share certificates shall be clearly endorsed to disclose the
          existence of this Agreement which imposes certain restrictions on the
          shareholders' rights in the Company including provisions on pre-
          emptive rights.

5.0       Listing of the Company
- ---       ----------------------

5.1       *****.

5.2       This Agreement is automatically terminated upon the initial public
          offering of the Company's shares and the listing of such shares on a
          stock exchange, and each Shareholder's shares shall be automatically
          converted into the class of shares being offered to the public and
          each Shareholder shall be deemed to own the class of shares which is
          being offered to the public in the same proportion as the share
          capital they owned immediately prior to such conversion.

5.0       Management of the Company
- ---       -------------------------

5.1       General Meetings

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.


                                      12
<PAGE>

6.1.1     The general meeting of the Shareholders of the Company is the highest
          authority of the Company. The annual general meeting shall be held not
          later than 5 months after the end of each financial year of the
          Company.

6.1.2     The chairman of the board of directors shall at the request of
          Shareholder(s) holding at least ***** percent of the issued share
          capital of the Company within 7 days of the request call an
          extraordinary general meeting to be convened for the business day
          following as close as practically possible to the expiry of the notice
          period referred to in clause 6.1.3. The agenda shall include the items
          proposed by said Shareholder(s).

6.1.3     Notices convening general meetings shall unless otherwise agreed
          between the Shareholders be sent by telefax and confirmed by
          simultaneous dispatch by registered airmail to each Shareholder not
          later than 21 days before the meeting. Such notice shall include the
          agenda and specify the place and date of the meeting. Unless otherwise
          agreed among the Parties any meeting shall take place in Copenhagen.
          Any enclosures to the agenda shall be forwarded to reach the
          Shareholders at least 10 days before the general meeting. 1.1.1

6.1.4     Notwithstanding any provisions to the contrary in the articles of
          association of the Company the Parties hereby undertake and warrant to
          each other that they shall vote or cause to be voted by their shares
          in such a manner as to give full effect to this Shareholders Agreement
          and to support the business interests of the Company unless otherwise
          agreed.

6.1.5     All matters before the general meeting shall be resolved by the
          affirmative vote of the holders of at least ***** of the share capital
          unless a higher majority is required under clause 6.1.6 or under the
          Danish Companies Act.

6.1.6     Each Party hereto agrees not to vote in favour of any resolution
          relating to any of the following matters unless Shareholders
          representing ***** of the share capital vote in favour of such
          resolution:
___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.


                                      13
<PAGE>

        (a)  increase or decrease of share capital of the Company;

        (b)  capital distributions to the Shareholders;

        (c)  change of articles of association of the Company;

        (d)  liquidation of the Company except as required by this Agreement or
             applicable law; and

        (e)  any of the matters referred to in clause 6.2.4.

6.1.7   The agenda for the annual general meeting shall include inter alia the
        following items:

        (a)  annual report of the board of directors concerning the activities
             of the past year;

        (b)  adoption of the annual audited financial statements;

        (c)  appointment or removal of directors of the board, if and when
             applicable law requires such appointment or removal; (1)

        (d)  appointment of auditors and fixing of their remuneration; and

        (e)  declaration of dividend.

6.1.8   A shareholder has the right to be represented at the general meeting by
        a proxy who does not need to be a shareholder of the Company.

        A shareholder or a proxy for a shareholder may be accompanied by one
        advisor who may speak at the general meeting on behalf of the
        shareholder.

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.



                                      14
<PAGE>

6.2       Board of Directors

6.2.1     *****.

6.2.2     The board of directors shall appoint the chairman from among
          themselves and the chairman will be elected at the first board meeting
          after the general meeting. The chairman will be elected for a period
          of one year. Regardless of who is acting as chairman, each director
          shall have only one vote and none of the votes shall be a casting
          vote. *****.

6.2.3     Except as set forth below in 6.2.4. all decisions of the board are
          taken by a majority of the members of the board present or duly
          represented. However, a resolution in writing signed by all the
          directors for the time being entitled to receive notice of a meeting
          of the board shall be as valid and effectual as if it had been passed
          at a meeting of the board duly convened and held.

6.2.4     Resolutions concerning the following matters which must be referred to
          the board for decision require unanimous approval by the board:

          (a)  to authorize the acquisition by purchase, lease or otherwise, of
               properties or other assets necessary or appropriate to the
               conduct of the Company's business when the cost per acquisition
               exceeds *****; (1)

          (b)  to authorize the sale, lease, exchange or other disposition of
               properties or other assets of the Company when the amount
               involved exceeds *****;

          (c)  to authorize the creation of mortgages, charges, liens, or any
               other encumbrances on the Company's properties;

          (d)  to approve the appointment of the management and the employment
               policy of the Company;

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.


                                      15
<PAGE>

(e)  to authorise the obtaining of loans for the Company which in the aggregate
     exceeds ***** in any financial year;

(f)  to authorize the granting of credit or making of loans by the Company which
     amount in the aggregate exceeds ***** in any financial year;

(g)  to authorize any unbudgeted expenditure in excess of *****;

(h)  to enter into or change or terminate any agreement with a shareholder, or
     persons or organisations related to the shareholders of the Company;

(i)  the entering into of contracts outside the ordinary course of business or
     contracts on unusual terms within the ordinary course of business including
     but not limited to significant expansion or reduction of the activities of
     the Company;

(j) the giving of guarantees or indemnities other than for the Company's own
     obligations;

(k) the instituting and settlement of legal proceedings;

(l) the approval of an annual business plan and budget for the Company;

(m) any investment in or acquisition of or merger with another company or other
    legal entity; (1)

(n) such other decisions as are mutually and unanimously agreed by the Parties;

(o) proposed changes in share capital; and

(p) proposed transfer of shares (in companies other than the Company itself);


___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.


                                      16
<PAGE>

6.2.5   Board meetings shall be held at places to be decided by *****.

6.2.6   Board meetings shall be called by the chairman with not less than four
        (4) weeks' notice unless otherwise mutually agreed upon. The chairman
        shall call a board meeting within two (2) days after having been
        requested to do so. These meetings shall be convened for a business day
        as closely as possible following the expiry of the aforesaid notice if
        so required by two (2) members of the board of directors.

6.2.7   Board meetings shall be called by telefax and confirmed by simultaneous
        dispatch by registered airmail. The call notice shall include the agenda
        and specify place and date of the meeting. Any enclosures to the agenda
        shall be forwarded with a confirming letter.

6.2.8   The Company shall pay the directors' reasonable travel, lodging and
        related expenses in connection with board meetings and general meetings
        but directors are not otherwise entitled to directors' fees. The general
        meeting may however unanimously decide that the Company shall pay a
        reasonable directors' fee, such decision to be valid for one year at a
        time.

6.2.9   The board of directors shall be able to transact business at any
        directors' meeting only if all ***** directors are present either in
        person or by telephone conference call.

6.2.10  The board of directors may unanimously agree to conduct a board meeting
        by a conference call, in which case minutes of the board meeting shall
        be circulated among the directors for their signature. The signature by
        each director of the minutes of the meeting shall serve as evidence to
        the director's approval of the business transacted at the board meeting.
        1.1.1


        A member of the board of directors may attend a board meeting by a
        conference call even though the other directors are physically present
        at the meeting. The signature by the director of the minutes of the
        meeting shall serve as evidence to the director's approval of the
        business transacted at the board meeting.

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.



                                      17
<PAGE>

6.2.11  Minutes of each board meeting shall be circulated among the directors
        for their signature. The signature by each director of the minutes shall
        serve as evidence to the director's approval of the business transacted
        at the board meeting.

6.2.12  *****. Notifications thereof shall be made by registered mail to the
        chairman of the board of the Company. If required by the Danish
        Companies Act, the chairman shall, without delay, call an extraordinary
        meeting to effect the replacement.


6.3     The Management

6.3.1   Unless otherwise agreed, the Company shall have only one chief executive
        officer (in Danish: "Adm.direcktor") to execute the decisions of the
        board and to manage the daily operations and affairs of the Company.

6.3.2   The chief executive officer shall be appointed unanimously by the board
        of directors.

         *****.

6.4     Other Employees

6.4.1   All and any officer of the Company shall be appointed unanimously by the
        board of directors.

6.4.2   *****.

7.0     Audit
        -----

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.


                                      18
<PAGE>

7.1     Upon signing of this Agreement the Parties have agreed to appoint
        Delloitte & Touche as the sole auditors of the Company. Change of
        auditors requires approval at a general meeting by a majority of
        shareholders representing ***** of the share capital.


8.0     Financial Year and Reporting

8.1     The financial year of the Company shall be a period of 12 calendar
        months ending on the last day of each calendar year.

8.2     The accounts of the Company shall be drawn up in accordance with
        generally accepted Danish and International accounting principles
        consistently applied.

8.3     The Parties shall cause the Company to distribute monthly progress
        reports to the directors specifying costs incurred compared with the
        budget, cash flow statements, and balance sheets as well as general
        information on all matters influencing the progress of the project. Such
        progress report shall be distributed to each of the directors not later
        than 1 month after the end of the month to which the report relates.

8.4     Annual financial statements and annual reports shall be prepared by the
        chief executive officer. They shall be approved by the Company's
        auditors and forwarded to the directors by the chief executive officer
        not later than fourteen (14) days prior to the annual general meeting at
        which the annual financial statements and reports are to be approved,
        cf. clause 6.1.1.

        The annual financial statements shall include a profit and loss account,
        and a balance sheet.


8.5     Not later than 3 months before the end of each financial year a budget
        containing profit and loss accounts, cash flow and balance sheet
        projections for the subsequent financial year shall be prepared by the
        chief executive officer and forwarded to each of the directors. The
        board of directors shall

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.



                                      19
<PAGE>

        consider and approve the budget and the chairman shall for that purpose
        convene a meeting of the board to be held before the beginning of each
        such subsequent financial year.


9.0     Dividend
        --------

9.1     Unless otherwise agreed between ***** of the Shareholders, no profits of
        the Company shall be distributed to the Shareholders as dividend, such
        distribution to be subject to the availability of distributable profits.


10.0    Confidentiality
        ---------------

10.1    The Parties recognise that during their common shareholding in the
        Company they will acquire information

         (i)  which one of the Parties considers as confidential;

        (ii)  which one of the Parties has received from a third party and has
              obliged itself to keep confidential;

       (iii)  which the Company considers as confidential;

        (In this clause collectively referred to as "Confidential Information").

10.2    It is hereby understood and agreed that any Confidential Information
        revealed or released by any Party shall be held in strict confidence and

        -    will not without the prior written consent of the Party in question
             be revealed or released to any third party; and



        -    will not be used for any purpose whatsoever except for the benefit
             of the purpose of the common shareholding of the Parties in the
             Company



                                      20
<PAGE>

         except such information that

         (i)      is or becomes available to the public through no breach of
                  this Agreement;

         (ii)     is known by the recipient at the time of disclosure by the
                  other Party hereto;

         (iii)    is received by the recipient after disclosure by the other
                  Party hereto from a source not a party to this Agreement who
                  is entitled to disclose same;

         (iv)     is required to be disclosed by applicable law.

10.3     The Parties are responsible for actions executed by their employees or
         associated persons who have access to the Confidential Information
         disclosed by the other Party.

10.4     The Parties recognise that the License Agreement grants to the Company
         exclusive rights to certain targets and other intellectual property
         rights and agree that the provisions of the License Agreement with
         regard to the rights granted to the Company thereunder are hereby
         incorporated in this Agreement as if fully set forth herein.

10.5     The contents of this clause 10 (other than the rights granted under the
         License Agreement) shall survive for ***** years after the termination
         of this Agreement.


11.0     Non-Performance
- ----     ---------------

11.1     In the event that a Party (the "Defaulting Party") commits a material
         breach - which also includes a Party's suspension of payments,
         liquidation, bankruptcy, application for a compulsory composition of
         debts, or moratorium - of the provisions of this Agreement or any other
         agreement relating to the operation of the Company (in the case of any
         other agreement providing such agreement is material


___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.


                                      21
<PAGE>

         to the operations of the Company) which is incapable of being remedied
         or which being capable of being remedied is not remedied within 30 days
         of notice from another Party specifying the breach and requiring its
         remedy, then the other Party (hereinafter referred to as the
         "Complainant" or "Complainants" as the case may be) shall be entitled
         to compensation for all damages arising from the breach, if necessary
         by instituting arbitration proceedings according to clause 17.


12.0     Voting at General Meetings - Right of Parties
- ----     ---------------------------------------------

12.1     The Parties undertake to cause their duly appointed representatives and
         directors to vote at general meetings and meetings of the board of
         directors of the Company in accordance with the terms of this Agreement
         in the case of the directors subject to applicable legal duties under
         the laws of the Kingdom of Denmark.

12.2     Each of Medarex and BankInvest shall through its duly appointed
         representative have the right upon the giving of notice at least 3 days
         in advance to the chief executive officer with a copy to the chairman
         of the board of directors to inspect at normal business times the
         books, records and documents of the Company and obtain copies of or
         make extracts from such books and records provided such representatives
         agree to be bound by the duty of confidentiality set forth in clause
         10.


13.0     Priority of Agreement
- ----     ---------------------

13.1     In the event of any conflict or inconsistency between the provisions of
         this Shareholders Agreement and the articles of association of the
         Company, the terms of this Shareholders Agreement shall prevail in all
         matters among the Parties. The Parties will collaborate in causing the
         Company to amend its articles of association to remove any conflict or
         inconsistency between the articles of association and the Shareholders
         Agreement.



___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      22
<PAGE>

14.0    General Provisions
- ----    ------------------

14.1    If any of the provisions of this Agreement is found to be inconsistent
        with, or void under applicable law, the validity of the remaining
        provisions shall not thereby be affected. In such case, the Parties
        shall agree to replace the ineffective provision by a new one of
        basically the same contents which shall be legally valid, binding and
        enforceable.

14.2    No modification, amendment to or cancellation of this Agreement shall be
        valid unless the same is in writing and signed by the parties hereto;
        provided, however, that the shareholders owning at least ***** of the
        share capital may effect any such modification, amendment, waiver or
        cancellation on behalf of all shareholders.

14.3    The Parties declare that they have not and shall not conclude any
        contracts or agreements which are inconsistent with the provisions of
        this Agreement.

14.4    Unless agreed to by ***** of the shareholders, each document,
        certificate, statement, report, accounts, agenda, minutes and other
        written material referred to in this Agreement shall be in the English
        language or be accompanied by an English translation thereof.

14.5    Except as specifically provided otherwise in this Agreement, no Party
        shall be deemed the legal representative or agent of another Party nor
        shall a Party have the right or authority to assume, create, or incur
        any liability or any obligation of any kind, expressed or implied,
        against or in the name or on behalf of another Party, nor shall this
        agreement be construed as having created a general or limited
        partnership among the Parties unless in each instance the other Parties
        shall have first consented thereto in writing.


15.0    Notices
- ----    -------


___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      23
<PAGE>

15.1    All notices to be given by a Party to another in connection with this
        Agreement, shall be given in writing in English and shall be sufficient
        in all respects if given personally by hand or sent by telefax confirmed
        by registered airmail, postage prepaid, addressed as follows:

        To Medarex:
        Medarex Inc.
        1545 Route 22 East
        P.O. Box 953
        Annandale
        NJ 08801-0953
        USA
        Att.: The President
        (Tel:   00 1 908 713 6001)
        (Fax:  00 1 908 713 6002)


        To GenPharm:
        GenPharm International, Inc.
        2350 Qume Drive
        San Jose
        CA  95131
        USA
        Att: President
        (Tel:   00 1 408 526 1290)
        (Fax:  00 1 408 955 9002)


        To BankInvest:

        Bankforeningernes Erhvervsudviklingsforening BankInvest
        Biomedicinsk Udvikling
        33 Toldbodgade
        DK-1022 Copenhagen K
        Denmark
        Att.: The General Manager
        (Tel:   011 45 77 30 9000)
        (Fax:  011 45 77 30 9182)

*****

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.




                                      24
<PAGE>

        or to such other address as the Party to receive such notice shall
        designate by written notice to the other Parties. Any notice sent
        otherwise shall be considered null and void. The effective date of any
        notice shall be the date on which it is actually received by the
        addressee except if sent by telex or telefax in which case it shall be
        effective upon the date which such telex or telefax is indicated as
        having been received by the receiving Party.


16.0    Duration
- ----    --------

16.1    This Agreement comes into force on the date upon which it has been
        signed by the Parties and shall remain in force and be binding upon the
        Parties as long as they are shareholders in the Company.

16.2    In case a Party no longer wishes to participate in the Company then,
        unless otherwise agreed upon, the only way to terminate the
        participation in the Company is to sell the shares according to clause
        4.


17.0    Governing Law and Arbitration.
- ----    ------------------------------

17.1    This Agreement shall be governed by and construed in accordance with the
        laws of the Kingdom of Denmark.

17.2    All disputes arising in connection with this Agreement shall be settled
        finally under the rules of The Danish Institute of Arbitration
        (Copenhagen Arbitration) by arbitrators appointed in accordance with
        said rules. The place of arbitration shall be Copenhagen. The cost of
        the arbitration, including administrative and arbitrators' fees and
        costs of attorneys' fees, shall be shared according to the decision of
        the Arbitration Court. Judgement on an award rendered by an arbitrator
        of arbitrators may be entered in any court having jurisdiction thereof.

17.3    The Parties shall undertake to do their utmost with a view to enabling
        the arbitration court to make a decision if at all reasonably possible
        within 3 months from the date of its first sitting.



18.0    Force Majeure
- ----    -------------




                                      25
<PAGE>

18.1    No liability under the Agreement will result to a Party from delay in
        performance caused by an event of "Force majeure", that is,
        circumstances beyond the reasonable control of the Party affected
        thereby, including without limitation, Acts of God, fire, war,
        government regulation or labour unrest. A Party whose performance of
        obligations has been delayed by an event of "Force majeure" (the
        Affected Party) will immediately notify the other Parties and will use
        its best efforts to overcome the effect of the event of "Force majeure"
        as soon as possible. The Affected Party will, to the extent that is
        reasonable under the circumstances, be relieved of its obligations under
        the Agreement for so long as the event of "Force majeure" is in effect."

                IN WITNESS WHEREOF the Parties hereto have caused this Agreement
to be executed by their duly authorized representatives as of the day and year
first above written.

For and on behalf of Medarex Inc.         For and on behalf of Bankforeningernes
                                          Erhvervsudviklingsforening BankInvest
                                          Biomedicinsk Udvikling


/s/ Michael A. Appelbaum                  [illegible]
- -------------------------------           -------------------------------------
Name: Michael A. Appelbaum
Title: Executive Vice President

For and on behalf of                      *****
GenPharm International, Inc.              *****

/s/ Michael A. Appelbaum                  *****
- -------------------------------
Name: Michael A. Appelbaum                *****
Title: President and Chief Officer

*****

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      26

<PAGE>

                                                                   EXHIBIT 10.81
                                                               February 25, 1999

                  EVALUATION AND COMMERCIALIZATION AGREEMENT

         THIS EVALUATION AND COMMERCIALIZATION AGREEMENT (the "Agreement"),
effective as of February 25, 1999 (the "Effective Date"), is entered by and
between GenPharm International, Inc., a wholly owned subsidiary of Medarex,
Inc., and Medarex, a New Jersey corporation, with a principal place of business
at 1545 Route 22 East, Annandale, New Jersey 08801 (together "Medarex"), and
Genmab ApS with a principal place of business at 4C Ringager, Dk-2605 Brondby,
Denmark ("Genmab").

                                  BACKGROUND

  A.   Medarex is the sole and exclusive owner of certain transgenic Mice
       useful for the preparation of fully human monoclonal Antibodies;

  B.   Genmab may wish to have Medarex conduct research with the Mice to
       evaluate their utility for the development of fully human monoclonal
       Antibodies to certain Antigens (as defined below) for use as a human
       therapeutic product, and/or produce Antibodies for clinical trials and
       commercial use, and Medarex is willing to conduct such research and
       production, on the terms and conditions herein; and

  C.   Medarex owns equity in Genmab pursuant to the Shareholders Agreement
       entered of event date herewith (attached hereto as Exhibit E).

       NOW, THEREFORE, Medarex and Genmab agree as follows:

1.     DEFINITIONS
- --     -----------

1.1    "Activity Plan(s)" shall mean the written plan(s) agreed by Medarex and
       -----------------
       Genmab pursuant to Article 2, on a project-by-project basis, describing
       the activities which Medarex will conduct on behalf of Genmab, as such
       plans may be amended from time to time by the written agreement of the
       parties.

1.2    "Affiliate" shall mean any corporation or other entity which is directly
       -----------
       or indirectly controlling, controlled by or under the common control with
       Genmab. For the purpose of this Agreement, "control" shall mean the
       direct or indirect ownership of fifty percent (50%) or more of the
       outstanding shares or other voting rights of the subject entity to elect
       directors, or if not meeting the preceding, any entity owned or
       controlled by or owning or controlling at the maximum control or
       ownership right permitted in the country where such entity exists. For
       purposes of this Agreement, Medarex shall not be considered as an
       Affiliate of Genmab.

1.3    "Antibody" shall mean a human monoclonal antibody with binding affinity
       ---------
       for an Antigen, obtained through the use of nucleic acid or cells derived
       from one or more of the Mice.

1.4    "Antigen" shall mean (i)each of the ***** antigens listed on Exhibit B
       --------
       hereto, and (ii)each of the other ***** antigens which become subject to
       this Agreement pursuant to Section 4.3 below

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -1-
<PAGE>

1.4    "Antigen" shall mean (i)each of the ***** antigens listed on Exhibit B
       --------
       hereto, and (ii)each of the other ***** antigens which become subject to
       this Agreement pursuant to Section 4.3 below

1.5     "Biological License Application" or "BLA" shall mean Biological License
        --------------------------------
        Application as defined in the U.S. Food, Drug and Cosmetic Act and the
        regulations promulgated thereunder, and any corresponding foreign
        application, registration or certification.

1.6     "Confidential Information" shall mean any proprietary or confidential
        -------------------------
        information or material in oral, graphic or written form disclosed
        hereunder that is identified as "Confidential" at the time of
        disclosure.

1.7     "Control" shall mean possession of the ability to grant the licenses
        --------
        provided for herein, without violating the terms of any agreement or
        other arrangement with any third party.

1.8     "IND" shall mean an Investigational New Drug application, as defined in
        ----
        the U.S. Food, Drug and Cosmetic Act and the regulations promulgated
        thereunder, or any corresponding foreign application, registration or
        certification.

1.9     "Medarex Technology" shall mean the Patent Rights and Know How.
        -------------------

1.9.1   "Know How" shall mean the Confidential Information and Mice owned or
        ---------
        Controlled by Medarex and transferred to Genmab by Medarex necessary for
        the exercise of the Patent Rights, including, without limitation,
        technical data, protocols and methods and processes. For the avoidance
        of doubt, the Know How does not include any Patent Rights.

1.9.2   "Patent Rights" shall mean all United States and foreign patents
        --------------
        (including all reissues, extensions, substitutions, confirmations, re-
        registrations, re-examinations, revalidations and patents of addition)
        and patent applications (including, without limitation, all
        continuations, continuations-in-part and divisions thereof) owned or
        Controlled by Medarex, in each case, which claims an invention which is
        necessary for the use of the Mice to prepare and use the Antibodies.

1.10    "Mice" shall mean immunizable transgenic mice existing as of the
        -----
        Effective Date or that may be developed by Medarex during the term of
        the Agreement containing unrearranged human immunoglobulin genes.

1.11    *****.

1.12    "MRC License" shall mean that certain License Agreement entered by
        ------------
        Medical Research Council, Institute of Animal Physiology and Genetics
        Research of Babraham Hall and Marianne BruggNmann and GenPharm
        International, Inc., effective October 1, 1993, as amended August 12,
        1994, a copy of which is attached hereto as Exhibit A, as may be amended
        from time to time.



___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -2-
<PAGE>

1.13    "Product" shall mean any product for the treatment of human disease
        --------
        containing one or more Antibodies, or a portion thereof.


1.14    "Sublicensee" shall mean a third party to whom Genmab has granted a
        ------------
        license or sublicense to make, have made, import, use, sell, offer for
        sale or otherwise exploit Products in the Territory. As used in this
        Agreement, "Sublicensee" shall also include a third party to whom Genmab
        has granted the right to distribute a Product.

1.15    "Territory" shall mean *****.
        ----------

2.      MEDAREX ACTIVITIES
- --      ------------------

2.1     Conduct of Activities; Notice. Genmab shall provide Medarex an
        ------------------------------
        opportunity to conduct any project, activities or task which Genmab
        wishes to have a third party conduct with respect to the Antibodies,
        including without limitation, *****. If Genmab intends to have any third
        party conduct any such activities on behalf of Genmab, Genmab shall
        provide Medarex notice of the specific projects, activities and/or tasks
        which it wants conducted not later than Genmab's ***** of a proposal or
        bid for such project from a third party, and Medarex may, at its
        discretion, to submit a competitive proposal for conducting any such
        activities, at the same time and in the same manner as any third
        party(ies).

2.2     Negotiation. If Medarex submits a proposal to conduct any such projects,
        ------------
        activities or tasks, Genmab shall negotiate in good faith with Medarex,
        on an arm's length basis, the terms on which such projects, activities
        and/or tasks will be conducted.

2.3     Activity Plans. If Genmab and Medarex agree that Medarex will conduct
        ---------------
        any projects, activities or tasks on behalf of Genmab pursuant to this
        Article 2, the parties shall promptly agree in writing on an Activity
        Plan for such activities which shall define the terms on which such
        projects, activities or tasks shall be conducted, including specific
        responsibilities, deliverables and timelines, and the payment schedule
        on which Genmab will make payments to Medarex for conducting such
        projects and/or activities, on a project-by-project basis. Unless
        otherwise agreed, a separate written Activity Plan shall be prepared for
        each project and/or project and/or set of activities which Medarex will
        conduct.

2.4     Preference for Medarex. With respect to any projects, activities or
        ----------------------
        tasks for which Medarex submits a competitive proposal, if Medarex is
        capable of conducting the particular projects, activities or tasks at a
        competitive price and in timely manner, Medarex shall have the right to
        conduct such activities, absent a material, compelling business reason
        to the contrary. In no event shall Genmab enter into an agreement for
        the conduct of activities with any third party on terms more favorable
        to the third party than those offered by Medarex for the conduct of such
        activities.



___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -3-
<PAGE>

3.      GENMAB ACTIVITIES
- --      -----------------

3.1     Research by Genmab. If Genmab elects to perform immunizations of the
        ------------------
        Mice, then Medarex shall supply Genmab Mice for such purpose, under the
        terms and conditions in this Article 3.

3.1.1   Research. Medarex will provide Mice to Genmab for use during the
        --------
        Research Period to allow Genmab to immunize the Mice against *****
        specific Antigens. Genmab agrees that during the Research Period the
        Mice will be used solely for the purpose of conducting the Research and
        for no other purpose.

3.1.2   Provision of Mice. Each year during the Research Period, Medarex shall
        -----------------
        provide Genmab, upon Genmab's request, with Mice ***** to perform the
        immunizations against the Antigens; provided, Medarex shall not be
        obligated to provide more than ***** in any calendar quarter during the
        Research Period. If any Mice delivered by Medarex die of natural causes
        before commencement of the relevant immunization protocol or for any
        reason during the immunization protocol, they shall be replaced ***** by
        Medarex, provided that their death was not due to Genmab's misfeasance
        or negligence, or the mice were rendered unusable by a failure by Genmab
        to commence immunization of the Mice within ***** of delivery.

3.1.3   Limited Use. Genmab shall only grant access to the Mice to those of its
        -----------
        employees, or subcontractors meeting the provisions of Section 3.1.6
        below, who require such access for the performance of this Agreement.
        Genmab shall not breed Mice, use them for any purpose other than the
        conduct of the Research, or transfer them to any other person or entity
        or to any place other than Genmab facilities. Genmab shall not make any
        effort, directly or indirectly, to clone or otherwise reproduce the Mice
        by any means, sexual or asexual. In no event shall Genmab transfer the
        Mice to any person or entity without the prior written approval of
        Medarex.

3.1.4   Care in Use of Mice. ***** Genmab therefore agrees to use prudence and
        -------------------
        reasonable care in the use, handling, storage, transportation and
        disposition and containment of the Mice, and to maintain the Mice under
        suitable containment conditions in compliance with all applicable
        national, state and local laws, regulations, rules and ordinances.

3.1.5   Records. Genmab will prepare and maintain complete and accurate written
        -------
        records of all uses made of the Mice and the Mice Materials, and copies
        of such records will be furnished to Medarex, upon Medarex's request, to
        the extent such records are reasonably required under this Agreement;
        provided, however, that Medarex shall maintain such records and the
        information contained therein in strict confidence in accordance with
        Article 8 hereof, and shall not use such records or information except
        to the extent permitted by this Agreement.

3.1.6   *****.

3.2     *****.

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -4-
<PAGE>

3.3     Term. The Research shall commence on the Effective Date and shall remain
        ----
        in effect until the earlier of (i) the ***** anniversary of the
        Effective Date, (ii) the date that Genmab has selected ***** Antigens
        and raised Antibodies thereto, or (iii) the termination of this
        Agreement.

3.4     Ownership.
        ---------

3.4.1   Mice. Title to the Mice and, subject to Sections 4.1 and 4.2, Mice
        ----
        Materials shall at all times remain with Medarex.

3.4.2   Intellectual Property. Any invention made by Medarex in the course of
        ---------------------
        activities in connection with the Research that are or relate to the
        Mice or Mice Materials shall be owned by Medarex, and shall be subject
        to the commercial license terms set forth in Article 4. Medarex will, in
        consultation with Genmab, file patent application(s) in respect of the
        Antibodies. Inventions made by Genmab or its employees, consultants or
        agents in connection with the Research or thereafter during the period
        that this Agreement is in effect which relate to the Antigens used to
        immunize Mice and to the Antibodies, as well as tangible property in
        such Antibodies, shall be owned by *****.


4.      LICENSE
- --      -------

4.1     Commercial License. Subject to the terms and conditions of this
        ------------------
        Agreement, Medarex hereby grants to Genmab the following licenses, on an
        ***** basis:

        (a)  an ***** license under the Medarex Technology to use the Mice to
             make Antibodies against such Antigen in the Territory, and

        (b)  an ***** license under the Medarex Technology, *****, to use such
             Antibodies against such Antigen to make, have made, import, have
             imported, use, offer for sale and sell Products in the Territory.

4.2     *****.

4.3     Other Antigens. At any time during the term of the Agreement, Genmab may
        --------------
        notify Medarex that it wishes to acquire an exclusive commercial license
        to use Mice to prepare Antibodies with respect to up to ***** additional
        particular Antigens identified by Genmab. Each Antigen shall be a
        specific molecular target or biochemical entity, in the case of defined
        proteins or polypeptides (including glyco- or lipo-proteins or
        carbohydrates), and the parties shall agree on a description of such
        Antigen. If Genmab can demonstrate to Medarex's reasonable satisfaction
        that Genmab has adequate financial resources to pay the development
        costs with respect to Products containing Antibodies against such
        Antigen through the completion of Phase II clinical trials, then unless
        Medarex has, previously granted a third party rights to use the Mice
        with respect to such Antigen or has commenced or has the intent


___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -5-
<PAGE>

        to commence an active research program on its own behalf with respect to
        such Antigen, as shown by written records that predate Genmab's written
        request by at least thirty days, then Medarex shall notify Genmab that
        such Antigen is available for licensing and to grant Genmab an exclusive
        commercial license to such Antigen on the terms herein. In the event
        that Medarex notifies Genmab that rights are not available with regard
        to a particular Antigen, Genmab shall have no further license or other
        rights with regard to such Antigen unless otherwise agreed in writing by
        the parties.

4.4     *****.

4.5     Retained Rights; No Further Rights. Only the license granted pursuant to
        ----------------------------------
        the express terms of this Agreement shall be of any legal force or
        effect. No other license rights shall be granted or created by
        implication, estoppel or otherwise. It is understood and agreed that
        Medarex shall retain rights to make, have made, import, use, offer for
        sale, sell and otherwise commercialize the Mice and any antibodies
        derived therefrom (except the Antibodies to which Genmab has and retains
        an exclusive license hereunder) itself or with third parties for any
        uses.


5.      PAYMENTS; REPORTS AND RECORDS
- --      -----------------------------

5.1     Reimbursements. Within ***** days of the Effective Date, Genmab shall
        --------------
        reimburse Medarex for all costs incurred prior to the Effective Date
        with respect to *****.

5.2     Third Party Royalties.
        ---------------------

5.2.1   Genmab Responsibilities. Genmab shall be responsible for the payment of
        -----------------------
        any royalties, license fees and milestone and other payments due to
        third parties under license agreements for the practice of the Medarex
        Technology by Genmab or its Affiliates or Sublicensees. *****.

5.2.2   Payments to Medarex. With respect to any license agreement Medarex has
        -------------------
        entered or enters with a third party with respect to intellectual
        property necessary for the manufacture, use or sale of Antibodies or
        Products for an Antigen, Genmab shall pay to Medarex amounts equal to
        the amounts due from Medarex to such third party under any such license
        for the grant and practice by Genmab and its Affiliates and Sublicensee
        of the licenses granted herein; *****.

5.3     Reports. Genmab shall deliver to Medarex within ***** days after the
        -------
        last day of each calendar quarter in which Products are sold a report
        for such calendar quarter identifying, by country and Product, the
        Products sold by Genmab and its Affiliates and Sublicensees, and the
        calculation of Net Sales and royalties due to Medarex.

5.4     Inspection of Books and Records. Genmab and its Affiliates and
        -------------------------------
        Sublicensees shall maintain accurate books and records which enable the
        calculation of royalties payable hereunder to be verified. Genmab and
        its Affiliates and Sublicensees shall retain the books and records for
        each


___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -6-
<PAGE>

        quarterly period for ***** after the submission of the corresponding
        report under Section 6.1 hereof. Upon ***** prior notice to Genmab,
        independent accountants selected by Medarex, may have access to the
        books and records of Genmab and its Affiliates and Sublicensees during
        normal business hours to conduct a review or audit, for the purpose of
        verifying the accuracy of Genmab's payments and compliance with this
        Agreement. Any such inspection or audit shall be at Medarex's expense;
        however, in the event an inspection reveals underpayment of ***** or
        more in any audit period, Genmab shall pay the costs of the inspection
        and promptly pay to Medarex *****.


6.      JAPAN CLINICAL RESULTS
- --      ----------------------

6.1     Disclosure. Genmab shall provide to Medarex the results of all
        ----------
        preclinical and clinical studies conducted by Genmab in the Territory
        with respect to the Product(s). *****.

6.2     *****.

6.3     *****.


7.      DILIGENCE
- --      ---------

7.1     *****.

7.2     Reasonable Efforts. Genmab will use its best efforts to develop and
        ------------------
        commercialize Products. Such efforts shall include without limitation,
        raising and expending sufficient funds to develop Products, obtaining
        regulatory approvals for the sale of Products worldwide and actively
        pursuing commercial sales of each Product in each country in which
        regulatory approval is obtained. Such efforts shall include, without
        limitation, the filing of an IND with the U.S. FDA (or its European
        equivalent) for products containing an Antibody to the applicable
        Antigen within two (2) years after the date that the Master Cell Bank
        for the applicable Antibodies was first established.

7.3     Limited Term. If Genmab fails to file an IND with the U.S. FDA (or its
        ------------
        European equivalent) with respect to a particular Product within *****
        after obtaining of a hybridoma for the Antibody included in such Product
        and the creation of the Master Cell Bank therefore, then Genmab may
        extend the date by which Phase I clinical trials may be conducted by
        ***** by paying to Medarex *****. Such payment shall be made on the
        ***** of the date that the Master Cell Bank for the applicable
        Antibodies was first established. If Genmab fails to timely achieve such
        milestone and fails to extend the period which it has to achieve such
        milestone by timely paying the fee due pursuant to the preceding
        sentence, then Medarex may terminate the license granted herein with
        regard to the relevant Antigen (and corresponding Antibodies and
        Products).


___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -7-
<PAGE>

7.4     Reports to Medarex. During the term of this Agreement, Genmab shall keep
        ------------------
        Medarex fully informed of its activities subject to this Agreement,
        including without limitation, the commercialization of Products, and on
        ***** of each year shall provide Medarex with a written report detailing
        such events and activities. When the registration package requesting
        approval for commercial sale of the Product (including approval for
        reimbursement by the appropriate health insurance authorities as well as
        price approvals where required) is first filed in *****, and in each
        case when approval is received therefor, Genmab will notify Medarex in
        writing within three days.


7.5     Regulatory Filings. Genmab shall submit registration packages requesting
        ------------------
        approval for commercial sale of the Product as soon as reasonably
        practicable. Genmab (or its designee) shall file and hold title to all
        regulatory applications, approvals and supplements thereto.

7.6     Abandoned Products. Genmab may voluntarily abandon its right hereunder
        ------------------
        to market the Product in any individual country, upon ***** written
        notice to Medarex, at any time prior to submission of the first BLA for
        the Product to the applicable regulatory authority in such country.
        Between the time of submission and the time of approval of said BLA,
        Genmab may voluntarily abandon its right hereunder to market Products in
        any such country upon ***** written notice to Medarex. Such notice will
        effectuate Genmab's voluntary abandonment of its right hereunder to
        market the Product in such country.


8.      CONFIDENTIALITY
- --      ---------------

8.1     Confidential Information. Except as expressly provided herein, the
        ------------------------
        parties agree that, for the term of this Agreement and for ***** years
        thereafter, the receiving party shall keep completely confidential and
        shall not publish or otherwise disclose and shall not use for any
        purpose except for the purposes contemplated by this Agreement any
        Confidential Information furnished to it by the disclosing party hereto
        pursuant to this Agreement, except that to the extent that it can be
        established by the receiving party by competent proof that such
        Confidential Information:

        (i)  was already known to the receiving party, other than under an
             obligation of confidentiality, at the time of disclosure;

       (ii)  was generally available to the public or otherwise part of the
             public domain at the time of its disclosure to the receiving party;

      (iii)  became generally available to the public or otherwise part of the
             public domain after its disclosure and other than through any act
             or omission of the receiving party in breach of this Agreement;

       (iv)  was independently developed by the receiving party as demonstrated
             by documented evidence prepared contemporaneously with such
             independent development; or

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -8-
<PAGE>

        (v)  was subsequently lawfully disclosed to the receiving party by a
             person other than a party hereto.



8.2     Permitted Use and Disclosures. Each party hereto may use or disclose
        -----------------------------
        information disclosed to it by the other party to the extent such use or
        disclosure is reasonably necessary in complying with applicable
        governmental regulations or otherwise submitting information to tax or
        other governmental authorities, conducting clinical trials, or making a
        permitted sublicense or otherwise exercising its rights hereunder,
        provided that if a party is required to make any such disclosure of
        another party's confidential information, other than pursuant to a
        confidentiality agreement, it will give reasonable advance notice to the
        latter party of such disclosure and, save to the extent inappropriate in
        the case of patent applications, will use its best efforts to secure
        confidential treatment of such information prior to its disclosure
        (whether through protective orders or otherwise).

8.3     Public Disclosure. Except as otherwise required by law, neither party
        -----------------
        shall issue a press release or make any other public disclosure of the
        terms of this Agreement without the prior approval of such press release
        or public disclosure. Each party shall submit any such press release or
        public disclosure to the other party, and the receiving party shall have
        ***** days to review and approve any such press release or public
        disclosure, which approval shall not be unreasonably withheld. If the
        receiving party does not respond within such ***** day period, the press
        release or public disclosure shall be deemed approved. In addition, if a
        public disclosure is required by law, including without limitation in a
        filing with the Securities and Exchange Commission, the disclosing party
        shall provide copies of the disclosure reasonably in advance of such
        filing or other disclosure for the nondisclosing party's prior review
        and comment.

8.4     Confidential Terms. Except as expressly provided herein, each party
        ------------------
        agrees not to disclose any terms of this Agreement to any third party
        without the consent of the other party; provided, disclosures may be
        made as required by securities or other applicable laws, or to actual or
        prospective investors or corporate partners, or to a party's
        accountants, attorneys and other professional advisors.


9.      REPRESENTATION AND WARRANTIES
- --      -----------------------------

9.1     Medarex.  Medarex represents and warrants that:  *****.
        -------
9.2     Genmab.  Genmab represents and warrants that:  *****.
        ------

9.3     Disclaimer of Warranties. THE MICE ARE PROVIDED "AS IS", AND EXCEPT AS
        ------------------------
        OTHERWISE EXPRESSLY SET FORTH IN THIS AGREEMENT, MEDAREX AND ITS
        RESPECTIVE AFFILIATES MAKE NO REPRESENTATIONS AND EXTEND NO WARRANTIES
        OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO
        THE MICE, ANTIBODIES, OR MEDAREX TECHNOLOGY, INCLUDING, BUT NOT LIMITED
        TO, WARRANTIES OF

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -9-
<PAGE>

        MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, VALIDITY OF THE
        PATENT RIGHTS LICENSED HEREUNDER, OR NONINFRINGEMENT OF THE INTELLECTUAL
        PROPERTY RIGHTS OF THIRD PARTIES.

9.4     Disclaimer. Except as provided in 9.1(v) nothing in this Agreement is or
        ----------
        shall be construed as:

        (a)  A warranty or representation by Medarex as to the validity or scope
             of any claim or patent within the Patent Rights;

        (b)  A warranty or representation that anything made, used, sold, or
             otherwise disposed of under any license granted in this Agreement
             is or will be free from infringement of any patent rights or other
             intellectual property right of any third party;

        (c)  An obligation to bring or prosecute actions or suits against third
             parties for infringement of any of the Patent Rights; or

        (d)  Granting by implication, estoppel, or otherwise any licenses or
             rights under patents or other rights of Medarex or third parties,
             regardless of whether such patents or other rights are dominant or
             subordinate to any patent within the Patent Rights.


10.     INTELLECTUAL PROPERTY
- ---     ---------------------

10.1    Patent Rights. Genmab shall be responsible, at its expense, for the
        -------------
        preparation, filing, prosecution and maintenance of the patent
        applications and patents owned by or on behalf of Genmab claiming
        Antibodies and/or Products ("Genmab Technology") in countries selected
        by Genmab, and for conducting any interferences, reexaminations,
        reissues, oppositions, or request for patent term extension relating
        thereto. Until the earlier of (i) the completion of an initial public
        offering by Genmab or (ii) the written agreement of the parties that a
        third party will conduct the foregoing activities, Genmab hereby agrees
        to retain Medarex to conduct such activities on its behalf. Genmab shall
        pay to Medarex an amount equal to *****. Genmab shall pay such costs and
        fees to Medarex within ***** days of an invoice therefore describing the
        relevant activities and costs.

10.2    Failure to Prosecute. In the event that Genmab declines to file or,
        --------------------
        having filed, declines to further prosecute and maintain any patent
        applications or patents subject to Section 9.1 above, Genmab shall
        provide Medarex notice thereof prior to the expiration of any deadline
        relating to such activities, but in any event at least ***** days prior
        notice, and Medarex shall have the right to file, prosecute and maintain
        such patent applications or patents in the name of Genmab, at Medarex's
        expense, using counsel of its choice.

10.3    Medarex Patent Rights. Subject to its contractual obligations to third
        ---------------------
        parties, Medarex shall be responsible, at its expense, for the
        preparation, filing, prosecution, maintenance and enforcement of



___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -10-
<PAGE>

        the Patent Rights and for conducting any interferences, reexaminations,
        reissues, oppositions, or request for patent term extensions relating
        thereto.

10.4    Cooperation. If at any time Medarex is not conducting patent-related
        ------------
        activities on behalf of Genmab, Medarex shall be given an opportunity to
        review Genmab' activities pursuant to Section 10.1 and provide input
        thereto. Genmab shall include in such patent applications such claims
        and take any such positions as Medarex may request. Genmab shall keep
        Medarex fully informed as to the status of such patent matters,
        including, without limitation, by providing Medarex the opportunity, at
        Medarex's expense, to review and comment on any documents relating to
        Genmab Technology which will be filed in any patent office at least
        ***** days before such filing, and promptly providing Medarex copies of
        any documents relating to Genmab Technology which Genmab receives from
        such patent offices, including notice of all interferences, reissues,
        reexaminations, oppositions or requests for patent term extensions.

10.5    Infringement Claims. If the manufacture, importation, sale or use of the
        --------------------
        Product pursuant to this Agreement results in any claim, suit or
        proceeding alleging patent infringement against Medarex or Genmab, such
        party shall promptly notify the other party hereto. The defendant shall
        keep each other party hereto reasonably informed of all material
        developments in connection with any such claim, suit or proceeding. At
        Genmab's request, Medarex will cooperate with Genmab in the defense of
        any claim, suit or proceeding alleging patent infringement against
        Genmab, if such claim, suit or proceeding is based directly on the
        practice of the Patent Rights and Genmab will reimburse Medarex for all
        out-of-pocket costs incurred in connection with such activities.


11.     DISPUTE RESOLUTION
- ---     ------------------

11.1     *****.

11.2     *****.


12.      *****
- ---

12.1     *****.

12.2     *****.

12.3     *****.


13.      TERM AND TERMINATION
- ---      --------------------

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -11-
<PAGE>

13.1    Term. The term of this Agreement shall commence on the Effective Date.
        -----
        Unless earlier terminated as provided in this Article 13, this Agreement
        shall continue in full force and effect on a country-by-country and
        Product-by-Product basis until there are no remaining royalty payment
        obligations in a country, at which time the Agreement shall expire in
        its entirety in such country.

13.2    Termination for Cause. Either party may terminate this Agreement in the
        ----------------------
        event the other party has materially breached or defaulted in the
        performance of any of its obligations hereunder, and such default has
        continued for ***** after written notice thereof was provided to the
        breaching party by the nonbreaching party. Any termination shall become
        effective at the end of such ***** period unless the breaching party has
        cured any such breach or default prior to the expiration of the *****
        period. 1.1

13.3    Termination for Insolvency. If voluntary or involuntary proceedings by
        ---------------------------
        or against a party are instituted in bankruptcy under any insolvency
        law, or a receiver or custodian is appointed for such party, or
        proceedings are instituted by or against such party for corporate
        reorganization or the dissolution of such party, which proceedings, if
        involuntary, shall not have been dismissed within sixty (60) days after
        the date of filing, or if such party makes an assignment for the benefit
        of creditors, or substantially all of the assets of such party are
        seized or attached and not released within sixty (60) days thereafter,
        the other party may immediately terminate this Agreement effective upon
        notice of such termination. Without limiting the foregoing, upon any
        liquidation of Genmab subject to Section 4.5 of the Shareholders
        Agreement, this Agreement shall terminate concurrently.

13.4    Effect of Termination.
        ----------------------

13.4.1  Accrued Rights and Obligations. Termination of this Agreement for any
        -------------------------------
        reason shall not release any party hereto from any liability which, at
        the time of such termination, has already accrued to the other party or
        which is attributable to a period prior to such termination nor preclude
        either party from pursuing any rights and remedies it may have hereunder
        or at law or in equity with respect to any breach of this Agreement. It
        is understood and agreed that monetary damages may not be a sufficient
        remedy for any breach of this Agreement and that the non-breaching party
        may be entitled to injunctive relief as a remedy for any such breach.

13.4.2  Ownership. Upon termination of this Agreement, title to all Mice, Mice
        ----------
        Materials, and Medarex Technology shall remain solely with Medarex.
        Title to any data, preclinical or clinical, research results or other
        information relating to tangible biological materials (other than the
        Mice Materials) derived by Genmab pursuant to this Agreement, shall be
        and remain solely with Genmab.

13.4.3  Return of Confidential Information. Upon any termination of this
        -----------------------------------
        Agreement, Genmab and Medarex shall promptly return to the other party
        all Confidential Information of the other; provided counsel of each
        party may retain one (1) copy of such Confidential Information for
        archival purposes and for ensuring compliance with Article 8.

___________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

                                      -12-
<PAGE>

13.4.4  Stock on Hand. In the event this Agreement is terminated for any reason,
        --------------
        Genmab shall have the right to sell or otherwise dispose of the stock of
        any Product subject to this Agreement then on hand, until the first
        anniversary of the effective date of such termination.

13.4.5  Return of Mice Materials. Upon any termination of this Agreement, Genmab
        -------------------------
        shall promptly return to Medarex, or destroy all Mice Materials,
        including, without limitation, all Antibodies and other biological
        materials derived from Mice, and all cells capable of producing
        Antibodies, and in the event of such destruction an officer of Genmab
        shall provide Medarex with written certification thereof. It is
        understood and agreed that except as expressly provided above Genmab may
        retain any materials owned by Genmab.

13.4.6  Licenses. The license granted in Section 3.2 shall terminate upon any
        ---------
        termination of this Agreement and in such event Genmab and its
        Sublicensees shall cease all development and commercialization of
        Products.

13.5    *****.


14.     MISCELLANEOUS
- ---     -------------


14.1    Governing Law. This Agreement and any dispute, including without
        --------------
        limitation any arbitration, arising from the performance or breach
        hereof shall be governed by and construed and enforced in accordance
        with the laws of the state of New Jersey, without reference to conflicts
        of laws principles.

14.2    Independent Contractors. The relationship of the parties hereto is that
        ------------------------
        of independent contractors. The parties hereto are not deemed to be
        agents, partners or joint venturers of the others for any purpose as a
        result of this Agreement or the transactions contemplated thereby.

14.3    Assignment. This Agreement shall not be assignable by either party to
        -----------
        any third party hereto without the written consent of the other party
        hereto, which consent shall not be unreasonably withheld; except either
        party may assign this Agreement, without such consent, to an entity that
        acquires all or substantially all of the business or assets of such
        party to which this Agreement pertains, whether by merger,
        reorganization, acquisition, sale, or otherwise.

14.4    Binding Effect. This Agreement shall be binding upon and inure to the
        ---------------
        benefit of the parties and their successors and assigns.

14.5    Notices. All notices, requests and other communications hereunder shall
        be in writing and shall be personally delivered or sent by telecopy or
        other electronic facsimile transmission or by registered or certified
        mail, return receipt requested, postage prepaid, in each case to the
        respective address specified below, or such other address as may be
        specified in writing to the other parties hereto:

         If to Medarex:    Medarex, Inc.
                           1545 Route 22 East
                           Annandale, New Jersey  08801
                           Attn:  President

         If to Genmab:     Genmab ApS
                           4C Ringager

                                      -13-
<PAGE>

                           Dk-2605 Brondby
                           Denmark
                           Attn:  Chief Executive Officer

16.6    Force Majeure. Neither party shall lose any rights hereunder or be
        --------------
        liable to the other party for damages or losses (except for payment
        obligations) on account of failure of performance by the defaulting
        party if the failure is occasioned by war, strike, fire, Act of God,
        earthquake, flood, lockout, embargo, governmental acts or orders or
        restrictions, failure of suppliers, or any other reason where failure to
        perform is beyond the reasonable control and not caused by the
        negligence, intentional conduct or misconduct of the nonperforming party
        has exerted all reasonable efforts to avoid or remedy such force
        majeure; provided, however, that in no event shall a party be required
        to settle any labor dispute or disturbance.

14.7    Injunctive Relief. Genmab acknowledges that limitations and restrictions
        ------------------
        on its possession and use of Mice and Mice Materials hereunder are
        necessary and reasonable to protect Medarex, and expressly agrees that
        monetary damages would be inadequate to compensate Medarex for any
        violation by Genmab of any such limitations or restrictions. The parties
        agree that any such violation would cause irreparable injury to Medarex
        and agrees that without resorting to prior mediation or arbitration,
        and, in addition to any other remedies that may be available in law, in
        equity or otherwise, Medarex shall be entitled to obtain temporary and
        permanent injunctive relief against any threatened violation of such
        limitations or restrictions or the continuation of any such violation in
        any court of competent jurisdiction, without the necessity of proving
        actual damages or the posting of any bond.

14.8    Advice of Counsel. Medarex and Genmab have each consulted counsel of
        ------------------
        their choice regarding this Agreement, and each acknowledges and agrees
        that this Agreement shall not be deemed to have been drafted by one
        party or another and will be construed accordingly.

14.9    Compliance with Laws. Each party shall furnish to the other party any
        ---------------------
        information requested or required by that party during the term of this
        Agreement or any extensions hereof to enable that party to comply with
        the requirements of any U.S. or foreign federal, state and/or government
        agency.

14.10   Further Assurances. At any time or from time to time on and after the
        -------------------
        date of this Agreement, either party shall at the request of the other
        party hereto (i) deliver to the requesting party any records, data or
        other documents consistent with the provisions of this Agreement,
        (ii) execute, and deliver or cause to be delivered, all such consents,
        documents or further instruments of transfer or license, and (iii) take
        or cause to be taken all such actions, as the requesting party may
        reasonably deem necessary in order for the requesting party to obtain
        the full benefits of this Agreement and the transactions contemplated
        hereby.

14.11   Export Controls. Each party agrees that it will take all actions
        ----------------
        necessary to insure compliance with all U.S. laws, regulations, orders
        or other restrictions on exports and further will not sell, license or
        reexport, directly, or indirectly, the Product(s) to any person or
        entity for sale in any country or territory, if, to the knowledge of
        each party based upon reasonable inquiry, such sale, would cause the
        parties to be in violation of any such laws or regulations now or
        hereafter in effect. Each party agrees to secure from any recipient of
        Product(s) adequate manually signed written assurances prior to shipment
        from the United States as are required by the U.S. Export Regulations.

14.12   Severability. In the event that any provisions of this Agreement are
        -------------
        determined to be invalid or unenforceable by a court of competent
        jurisdiction, the remainder of the Agreement shall remain in

                                      -14-
<PAGE>

        full force and effect without said provision. In such event, the parties
        shall in good faith negotiate a substitute clause for any provision
        declared invalid or unenforceable, which shall most nearly approximate
        the intent of the parties in entering this Agreement.

14.13   Waiver. It is agreed that no waiver by either party hereto of any breach
        -------
        or default of any of the covenants or agreements herein set forth shall
        be deemed a waiver as to any subsequent and/or similar breach or
        default.

14.14   Complete Agreement. This Agreement, with its Exhibits, constitutes the
        -------------------
        entire agreement, both written and oral, between the parties with
        respect to the subject matter hereof, and that all prior agreements
        respecting the subject matter hereof, either written or oral, expressed
        or implied, are merged and canceled, and are null and void and of no
        effect. No amendment or change hereof or addition hereto shall be
        effective or binding on either of the parties hereto unless reduced to
        writing and duly executed on behalf of both parties.


14.15   Use of Name. Neither party shall use the name or trademarks of the other
        ------------
        party without the prior written consent of such other party.

14.16   Headings. The captions to the several Sections and Articles hereof are
        ---------
        not a part of this Agreement, but are included merely for convenience of
        reference only and shall not affect its meaning or interpretation

14.17   Counterparts. This Agreement may be executed in two counterparts, each
        -------------
        of which shall be deemed an original and which together shall constitute
        one instrument.

        IN WITNESS WHEREOF, Medarex, GenPharm and Genmab have executed this
Agreement by their respective duly authorized representatives.

MEDAREX INC.                              GENMAB ApS


By: /s/ Michael Appelbaum                 By: /s/ Lisa N. Drakeman
    ----------------------------------        --------------------------------
Print Name: Michael Appelbaum                       Print Name: Lisa Drakeman
         Title: Executive V.P.                   Title: Chief Executive Officer



GENPHARM INTERNATIONAL, INC.


By: /s/ Michael Appelbaum
    ----------------------------------
Print Name: Michael Appelbaum
         Title: President

                                      -15-
<PAGE>

                                                               February 25, 1999


*****

____________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.


*****

                                      -16-
<PAGE>

                                   EXHIBIT A
                                   ---------

*****


____________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

<PAGE>

                                   EXHIBIT B
                                   ---------
*****

____________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

<PAGE>

                                   EXHIBIT C
                                   ---------

*****


____________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

<PAGE>

                                   EXHIBIT D
                                   ---------
*****

____________________

***** REPRESENTS CONFIDENTIAL PORTION WHICH HAS BEEN OMITTED AND FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

<PAGE>

                                   EXHIBIT E
                                   ---------

Shareholders Agreement



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