CONFORMED COPY

          CONVERTIBLE PREFERRED STOCK PURCHASE
AGREEMENT (the "Agreement") dated as of September 29, 1995
between Immunomedics, Inc., a corporation organized and existing
under the laws of the State of Delaware (the "Company") and the
persons listed on the signature page hereto (each, a "Purchaser" and
collectively, the "Purchasers").

          WHEREAS, the Company desires to issue and sell to the
Purchasers and the Purchasers desire to acquire 200,000 shares of the
Company's Series C Convertible Preferred Stock, par value $0.01 per
share (the "Series C Preferred").

          IN CONSIDERATION of the mutual covenants
contained in this Agreement, the Company and the Purchasers agree
as follows:


                    ARTICLE I
                        
     Purchase and Sale of Series C Preferred

     1.1  Purchase and Sale of Series C Preferred.  Upon the terms
and conditions set forth herein, the Company shall issue and sell to
each of the Purchasers, and each of the Purchasers shall purchase,
such number of shares (the "Shares") of Series C Preferred as is set
forth opposite such Purchaser's name on Schedule 1 hereto. The
Series C Preferred shall contain the terms and provisions set forth in
the Certificate of Designation (the "Certificate of Designation"), a
copy of which is attached hereto as Exhibit A.

     1.2  Purchase Price.  The aggregate purchase price for the
Shares purchased by each Purchaser (the "Aggregate Purchase Price")
shall equal the product of the number of Shares purchased by such
Purchaser and $50.00 (the "Purchase Price Per Share").

     1.3  The Closing. 

          (a)  The closing of the purchase and sale of the Shares
   (the "Closing") shall take place at the offices of Warshaw Burstein
   Cohen Schlesinger & Kuh, LLP, 555 Fifth Avenue, New York, New
   York 10017 at 10:00 a.m., New York City on September 29, 1995 or
   on such other earlier date as the Purchasers and the Company may
   agree or as provided in Section 1.3(b).  The date of the Closing is
   hereinafter referred to as the Closing Date.
   
          (b)  At the Closing, (i) the Company shall deliver to
   each Purchaser or its representative one or more stock certificates
   representing the Shares, which shall be free of restrictive legends or
   "stop transfer" restrictions, registered in the name of the Purchaser
   and (ii) each Purchaser shall deliver to the Company the Aggregate
   Purchase Price as determined pursuant to this Article I in immediately
   available funds by wire transfer to such account as shall be
   designated in writing by the Company.  In addition, each of the
   Company and the Purchasers shall deliver all documents, instruments
   and writings required to be delivered by any of them pursuant to this
   Agreement at or prior to Closing.
   
   
                        ARTICLE II
   
               Representations and Warranties
   
     2.1 Representations, Warranties and Agreements of the
   Company. The Company hereby makes the following representations,
   warranties and agreements with and to the Purchasers:
   
          (a)  Organization and Qualification.  The Company is
   a corporation duly and validly existing and in good standing under
   the laws of the State of Delaware and has the requisite corporate
   power to own its properties and to carry on its business as now being
   conducted.  Except as set forth on Schedule 2.1(a), as of the date
   hereof, the Company does not have any subsidiaries.  The Company
   is duly qualified as a foreign corporation to do business and is in
   good standing in every jurisdiction in which the nature of the
   business conducted or property owned by it makes such qualification
   necessary and where the failure so to qualify would have a Material
   Adverse Effect.  "Material Adverse Effect" means any material adverse
   effect on the operations, properties, prospects, or financial condition
   of the Company.
    
          (b)  Authorization; Enforcement.  (i) The Company has
   the requisite corporate power and authority to enter into and perform
   this Agreement and to issue the Shares and the shares of Common
   Stock issuable upon conversion of the Shares (the "Underlying
   Shares" and with the Shares, the "Securities") in accordance with the
   terms hereof and the Certificate of Designation, (ii) the execution and
   delivery of this Agreement by the Company and the consummation
   by it of the transactions contemplated hereby has been duly
   authorized by the Company's Board of Directors and no further
   consent or authorization of the Company or its Board of Directors or
   stockholders is required, (iii) this Agreement has been duly executed
   and delivered by the Company and (iv) this Agreement constitutes a
   valid and binding obligation of the Company enforceable against the
   Company in accordance with its terms, except as such enforceability
   may be limited by applicable bankruptcy, insolvency, reorganization,
   moratorium, liquidation or similar laws relating to, or affecting
   generally the enforcement of, creditors' rights and remedies or by
   other equitable principles of general application.
   
          (c)  Capitalization.  The authorized, issued and
   outstanding capital stock of the Company is as set forth in Schedule
   2.1 (c).  No shares of Common Stock are entitled to preemptive rights. 
   Except as disclosed in Schedule 2.1 (c), as of the date of this
   Agreement there are no outstanding options, warrants, scrip, rights to
   subscribe to, calls or commitments of any character whatsoever
   relating to, or securities or rights convertible into, any shares of
   capital stock of the Company, or contracts, commitments,
   understandings, or arrangements by which the Company or any of its
   subsidiaries is or may become bound to issue additional shares of
   Common Stock, or options, warrants, scrip, rights to subscribe to, or
   commitments to purchase or acquire, any shares, or securities or
   rights convertible into shares, of capital stock of the Company.  The
   Company has furnished to the Purchasers true and correct copies of
   the Company's Certificate of Incorporation, as amended, in effect on
   the date hereof (the "Certificate of Incorporation") and, the
   Company's Amended and Restated By-Laws, as in effect on the date
   hereof (the "By-Laws").
   
          (d)  Issuance of Shares.  The Shares are duly authorized,
   and when paid for in accordance with the terms hereof shall be
   validly issued, fully paid and nonassessable and free and clear of all
   liens, claims and encumbrances.  The Underlying Shares are duly
   authorized, and when issued upon conversion in accordance with the
   terms of the Certificate of Designation shall be validly issued, fully
   paid and nonassessable and free and clear of all liens, claims and
   encumbrances.  The Company has and will maintain an adequate
   reserve of shares of Common Stock to enable it to perform its
   obligations under this Agreement.
   
          (e)  No Conflicts.  The execution, delivery and
   performance of this Agreement by the Company and the
   consummation by the Company of the transactions contemplated
   hereby or relating hereto do not and will not (i) result in the violation
   of the Company's Certificate of Incorporation or By-laws or (ii)
   conflict with, or constitute a default (or an event which with notice or
   lapse of time or both would become a default) under, or give to
   others any rights of termination, amendment, acceleration or
   cancellation of, any agreement, indenture or instrument to which the
   Company is a party, or to the actual knowledge of the Company,
   result in a violation of any law, rule, regulation, order, judgment or
   decree (including Federal and state securities laws and regulations)
   applicable to the Company, or by which any property or asset of the
   Company is bound or affected (except for such conflicts, defaults,
   terminations, amendments, accelerations, cancellations and violations
   as would not, individually or in the aggregate, have a Material
   Adverse Effect).  The business of the Company is not being conducted
   in violation of any law, ordinance or regulation of any governmental
   entity, except for possible violations which either singly or in the
   aggregate do not have a Material Adverse Effect.  The Company is not
   required to obtain any consent, authorization or order of, or make
   any filing or registration with, any court or governmental agency in
   order for it to execute, deliver or perform any of its obligations under
   this Agreement or issue and sell the Securities in accordance with the
   terms hereof and the Certificate of Designation, except for the filing
   of the Certificate of Designation with the Secretary of State of the
   State of Delaware, which filing shall be effected prior to the Closing
   Date.
   
          (f)  SEC Documents Financial Statements.  The
   Common Stock of the Company is registered pursuant to section 12(g)
   of the Securities and Exchange Act of 1934, as amended (the
   "Exchange Act") and through and including the date hereof, the
   Company has filed all reports, schedules, forms, statements and other
   documents required to be filed by it with the Securities and Exchange
   Commission (the "SEC") pursuant to the reporting requirements of the
   Exchange Act, including material filed pursuant to section 13(a) or
   15(d) (all of the foregoing filed prior to the date hereof being
   hereinafter referred to herein as the "SEC Documents").  The
   Company has delivered to the Purchasers true and complete copies
   of the SEC Documents (other than documents incorporated by
   reference therein but not filed therewith) filed with the SEC since June
   30, 1994.  The Company has not provided any non-public
   information to the Purchasers.  As of their respective dates, the SEC
   Documents complied in all material respects with the requirements
   of the Exchange Act and the rules and regulations of the SEC
   promulgated thereunder applicable to such SEC Documents, and
   none of the SEC Documents, when filed, contained any untrue statement 
   
   of a material fact or omitted to state a material fact required
   to be stated therein or necessary in order to make the statements
   therein, in light of the circumstances under which they were made,
   not misleading. The financial statements of the Company included in
   the SEC Documents comply as to form in all material respects with
   applicable accounting requirements and the published rules and
   regulations of the SEC with respect thereto.  Such financial statements
   have been prepared in accordance with generally accepted
   accounting principles applied on a consistent basis during the periods
   involved (except (i) as may be otherwise indicated in such financial
   statements or the notes thereto or (ii) in the case of unaudited interim
   statements, to the extent they may not include footnotes or may be
   condensed or summary statements) and fairly present in all material
   respects the financial position of the Company as of the dates thereof
   and the results of operations and cash flows for the periods then
   ended (subject, in the case of unaudited statement, to normal
   year-end audit adjustments).  
   
          (g)  Absence of Material Changes.  Except as otherwise
   publicly disclosed, since June 30, 1995, there has been no event,
   occurrence or development that has a Material Adverse Effect.  Except
   as otherwise publicly disclosed, since June 30, 1995, no event has
   occurred which the Company would be required to disclose pursuant
   to applicable statue, law, rule or regulation but which has not so been
   disclosed.  
   
          (h) No Undisclosed Liabilities.  Except as set forth in the
   SEC Documents or otherwise publicly disclosed, the Company has no
   liabilities or obligations (whether direct, indirect, contingent or
   otherwise) which have had or in the Company's reasonable judgment
   could have a Material Adverse Effect if the Company were required
   to perform such obligations.
    
     2.2  Representations and Warranties of the Purchasers. Each
   Purchaser,as applicable, hereby makes the following representations
   and warranties to the Company as to itself, but not as to any other
   Purchaser:
   
          (a)  Organization; Authorization; Enforcement. (i) The
   Purchaser is a corporation or partnership duly and validly existing and
   in good standing under the laws of the jurisdiction of its incorporation
   or organization and has the requisite power to own its properties and
   to carry on its business as now being conducted, (ii) the Purchaser has
   the requisite power and authority to enter into and perform this
   Agreement, (iii) the execution and delivery of this Agreement by the
   Purchaser and the consummation by it of the transactions
   contemplated hereby have been duly authorized by all necessary
   action, and no further consent or authorization of the Purchaser or its
   Board of Directors or stockholders or partners is required, (iv) this
   Agreement has been duly executed and delivered by the Purchaser
   (or on Purchaser's behalf by its investment manager duly authorized
   to act on its behalf) and (v) this Agreement constitutes a valid and
   binding obligation of the Purchaser enforceable against the Purchaser
   in accordance with its terms, except as such enforceability may be
   limited by applicable bankruptcy, insolvency, reorganization,
   moratorium, liquidation or similar laws relating to, or affecting
   generally the enforcement of, creditors' rights and remedies or by
   other equitable principles of general application.
   

          (b)  No Conflicts. The execution, delivery and
   performance of this Agreement by the Purchaser and the
   consummation by the Purchaser of the transactions contemplated
   hereby or relating hereto do not and will not (i) result in the violation
   of the Purchaser's charter documents or By-Laws or other
   organizational documents, (ii) conflict with, or constitute a default (or
   an event which with notice or lapse of time or both would become
   a default) under, any agreement, indenture or instrument to which the
   Purchaser is a party, or result in a violation of any law, rule,
   regulation, order, judgment or decree of any court of governmental
   agency applicable to the Purchaser or its properties (except for such
   conflicts, defaults and violations as would not, individually or in the
   aggregate, have a material adverse effect on the Purchaser). The
   Purchaser is not required to obtain any consent, authorization or
   order of, or make any filing or registration with, any court or
   governmental agency in order for it to execute, deliver or perform any
   of its obligations under this Agreement or purchase the Shares in
   accordance with the terms hereof.
   
          (c)  Non U.S. Ownership.  The Purchaser is not a U.S.
   Person as defined within Regulation S ("Regulation S") promulgated
   under the Securities Act of 1933 (the "Securities Act") and is not
   purchasing the Shares for the account or benefit of a U.S. Person.  If
   the Shares are being purchased on Purchaser's behalf by its
   investment manager, such investment manager is a dealer or other
   professional fiduciary in accordance with Rule 902(o)(2) of Regulation
   S.  The Purchaser has such knowledge and experience in financial
   and business matters that it is capable of evaluating the merits and
   risks of the investments contemplated by this Agreement. The
   Purchaser has been afforded, to the satisfaction of the Purchaser, the
   opportunity to review the SEC Documents and obtain such additional
   publicly available information concerning the Company and its
   business, and to ask such questions and receive such answers (based
   upon publicly available information), as the Purchaser deems
   necessary to make an informed investment decision.
   
          (d) Investment Intent.  The Purchaser is purchasing the
   Securities for investment purposes and not with a view towards
   distribution.  The Purchaser has no present intention to sell the
   Securities and has no present arrangement (whether or not legally
   binding) to sell the Securities to or through any person or entity;
   provided, however, that by making the foregoing representation and
   warranty, the Purchaser does not agree to hold the Securities for any
   minimum or other specific term and reserves the right to dispose of
   the Securities at any time in accordance with the Securities Act and
   any other applicable securities laws.
   


                         ARTICLE III
                              
                          Covenants
                              
     3.1  Regulation S. (a) The Company shall take all necessary
   reasonable corporate action and proceedings as may be required by
   applicable law, rule or regulation for the legal and valid issuance of
   the Shares to the Purchasers at the Closing in accordance with this
   Agreement, for the legal and valid issuance of the Underlying Shares
   upon conversion of the Shares in accordance with this Agreement and
   
   the Certificate of Designation, and for any transfer or other disposition
   or financing thereof, when and as permitted under Regulation S
   without registration under the Securities Act or other applicable law. 
   Neither the Company nor any of its affiliates have engaged or will
   engage in any "directed selling efforts" (as such term is defined under
   Regulation S) with respect to the Shares or the Underlying Shares and
   have complied and will comply with the "offering restrictions"
   requirements of Regulation S.
   
          (b)  Each Purchaser acknowledges as to itself, but not
   as to any other Purchaser, that the Shares and the Underlying Shares
   have not been nor, except as otherwise provided in this Agreement,
   will be registered under the Securities Act. Such Purchaser covenants
   (i) that it is not, and does not intend to be a "distributor" (as such term
   is defined by Regulation S) of the Shares or the Underlying Shares,
   but if it so acts then such Purchaser will comply with all applicable
   requirements under Regulation S in connection therewith, (ii) that it
   will not offer or sell the Shares or the Underlying Shares within the
   United States or to, or for the account or benefit of, any "U.S. person"
   (as each such term is defined in Regulation S) except in accordance
   with the provisions of Rule 903 or Rule 904 of Regulation S or
   pursuant to an exemption from the registration requirements of the
   Securities Act and (iii) that neither the Purchaser, its affiliates, nor
   persons acting on their behalf, have engaged or will engage in
   "directed selling efforts" (as such term is defined by Regulation S)
   with respect to the Shares and the Underlying Shares and that, if a
   distributor, each of them has complied and will comply with the
   "offering restrictions" requirements of Regulation S.
   
          (c)  The Company acknowledges that the Purchasers
   may from time to time engage in purchases, sales, financings or
   transactions in the Common Stock separate and apart from the
   Securities acquired pursuant to this Agreement.
   
     3.2  Common Stock. From the date hereof through the Closing
   Date, the Company shall not (i) amend its Certificate of Incorporation
   or By-laws so as to adversely affect any rights of the Purchasers; (ii)
   split, combine or reclassify its outstanding capital stock; (iii) declare
   or set aside or pay any dividend or other distribution with respect to
   the Common Stock; (iv) repurchase or offer to repurchase shares of its
   stock; (v) sell equity or equity related securities (except shares issued
   upon exercise of options granted under the Company's stock option
   plan) or (vi) enter into any agreement with respect to the foregoing.
   
     3.3  Purchasers' Rights if Regulation S is Amended. In the
   event that at any time on or after the Closing Date and prior to the
   expiration of the Conversion Term (as defined in the Certificate of
   Designation), the Purchasers and the Company jointly agree (or in the
   event they are unable to so agree upon receipt by the Company of an
   opinion of a third party, mutually acceptable to the Company and the
   Purchasers, who is experienced in transactions of this type) that
   Regulation S has been amended or interpreted in a manner so as to
   adversely effect the marketability of the Shares or the shares of
   Common Stock underlying the Shares, other than as a result of the
   actions taken by the Purchasers, then, at the Company's option, the
   Company shall promptly (i) file a registration statement under the
   Securities Act of 1933, as amended, to register for sale the Underlying
   Shares and to use its reasonable efforts to cause such registration
   statement to be declared effective or (ii) redeem the Shares and the
   
   Underlying Shares, at an aggregate purchase price, in the case of the
   Shares, equal to the Stated Value of the Shares to be redeemed plus
   interest from the date of issuance at a rate equal to the monthly
   LIBOR, and in the case of the Underlying Shares, the Market Value
   (as defined below) of the Underlying Shares to be redeemed. For
   purposes of this Article III, the Market Value shall equal the average
   of the Per Share Market Value (as defined in the Certificate of
   Designation) for the 15 Trading Days (as defined in the Certificate of
   Designation) ending 5 Trading Days prior to the date the Underlying
   Shares are to be redeemed.
    
     3.4  Purchasers' Rights if Trading in Common Stock is
   Suspended. In the event that at any time on or after the Closing Date
   and prior to the expiration of the Conversion Term, trading in the
   shares of the Company's Common Stock is suspended on the
   principal market or exchange for such shares (including The Nasdaq
   Stock Market), for a period of five consecutive Trading Days, other
   than as a result of the suspension of trading in securities generally,
   then, at each Purchaser's option, the Company shall redeem the
   Shares at an aggregate purchase price, in the case of the Shares, equal
   to the Stated Value of the Shares to be redeemed and in the case of
   the Underlying Shares, the Market Value of the Underlying Shares to
   be redeemed.
   
     3.5  Limitations on Purchasers' Right to Convert. 
   Notwithstanding anything to the contrary contained herein or in the
   Certificate of Designation, no Purchaser, shall be entitled to convert
   any Shares if the number of shares of Common Stock that the holder
   of Shares is then entitled to receive upon the conversion of such
   number of Shares as is then being submitted for conversion, together
   with any other shares of Common Stock then held will equal or
   exceed 5% of the issued and outstanding shares of Common Stock,
   after giving effect to the shares of Common Stock to be issued
   pursuant to such Conversion Notice.  Each Conversion Notice (as
   defined in the Certificate of Designation) shall contain a
   representation as to the foregoing.  If at the expiration of the
   Conversion Term, a Purchaser, as a result of the provisions of this
   Section 3.5, shall be unable to exercise its right to convert Shares, the
   Conversion Term shall be extended for such additional time, not to
   exceed three months, to permit such Purchaser to convert, at its
   option, such remaining Shares as it shall then own giving effect to (i)
   an increase in the Conversion Price (as defined in the Certificate of
   Designation), (ii) an increase in the number of outstanding shares of
   Common Stock, or (iii) a decrease in the number of shares of
   Common Stock owned by such Purchaser.
   
     3.6  Limitations on Purchaser's Right to Sell Common Stock. 
   Each Purchaser agrees that during the period commencing on the
   Closing Date and ending 40 days thereafter, it will not engage in any
   short selling or other hedging transaction in the Securities including,
   without limitation, option writing equity swaps or other types of
   derivative transactions, the intent of which is to transfer incidence of
   ownership into the United States during such period.  Each Purchaser
   hereby further agrees that during the period commencing on the date
   that a Conversion Notice is delivered to the Company until the end
   of the relevant Pricing Period (as such term is defined in the
   Certificate of Designation), such Purchaser will not, nor direct any
   affiliate or broker acting on its behalf to, enter into (i) a sale of the
   Common Stock at a price which is then below the then low daily
   
   trading price of the Common Stock or (ii) any "market open" or
   "market close" transaction which would result in establishing a new
   low daily trading price for the Common Stock on such day.
   
     3.7  Adjustment to Conversion Price.  In the event that at any
   time on or after the Closing Date and prior to the expiration of the
   Conversion Term but not later than the first anniversary of the Closing
   Date (the "Adjustment Period"), the Company shall issue, in a private
   placement or an offering under Regulation S, Common Stock or any
   securities convertible into or exercisable for Common Stock, which
   the Company determines, in its reasonable judgment, has a sales
   price (in the case of Common Stock) or a conversion or exercise price
   (in the case of securities convertible into or exercisable for Common
   Stock), as the case may be (the "Adjusted Conversion Price"), as a
   percentage of the Average Price on the date of issuance, that is less
   than the Conversion Price of the Series C Preferred Stock, as a
   percentage of the Pricing Period Average Price, then, upon the
   request of the holders of a Majority in Interest (as defined in the
   Certificate of Designation) of the then outstanding Shares, the
   Company shall promptly file a certificate of amendment to the
   Certificate of Designation to permit the then outstanding Shares to
   thereafter be converted into Common Stock at the Adjusted
   Conversion Price.  During the Adjustment Period, the Company
   agrees to promptly notified each holder of Shares of any issuance of
   securities in a private placement or offering under Regulation S.
   

   
                         ARTICLE IV
   
                         Conditions
   
     4.1  Conditions Precedent to the Obligation of the Company
   to Sell the Shares. The Obligation hereunder of the Company to sell
   the Shares to the Purchasers is further subject to the satisfaction, at or
   before the Closing, of each of the following conditions set forth
   below.  These conditions are for the Company's sole benefit and may
   be waived by the Company at any time in its sole discretion.
   
          (a)  Accuracy of the Purchasers' Representations and
   Warranties.  The representations and warranties of the Purchaser shall
   be true and correct in all material respects as of the date when made
   and as of the Closing Date as though made at that time.
   
          (b)  Performance by the Purchasers.  The Purchasers
   shall have performed, satisfied and complied in all material respects
   with all covenants, agreements and conditions required by this
   Agreement to be performed, satisfied or complied with by the
   Purchasers at or prior to the Closing.
   
          (c)  No Injunction.  No statute, rule, regulation,
   executive order, decree, ruling or injunction shall have been enacted,
   entered, promulgated or endorsed by any court of governmental
   authority of competent jurisdiction which prohibits the
   consummation of any of the transactions contemplated by this
   Agreement.


          (d)  No Change in Regulation S.  Regulation S shall not
   have been, nor proposed to be, amended or interpreted in a manner,
   which, in the reasonable judgment of the Company, would materially
   adversely effect the issuance or sale of the Securities by the
   Company.
   
          (e)  Filing of the Certificate of Designation. The
   Certificate of Designation shall have been duly filed with the
   Secretary of State of the State of Delaware and a certified copy thereof
   shall have been returned to the Company.
   
     4.2  Conditions Precedent to the Obligation of the Purchasers
   to Purchase the Shares.  The obligation of each Purchaser hereunder
   to acquire and pay for the Shares is subject to the satisfaction, at or
   before the Closing, of each of the following conditions set forth
   below.  These conditions are for each Purchaser's sole benefit and
   may be waived by such Purchaser at any time in its sole discretion.
   
          (a)  Accuracy of the Company's Representations and
   Warranties.  The representations and warranties of the Company shall
   be true and correct in all material respects as of the date when made
   and as of the Closing Date as though made at that time (except for
   representations and warranties set forth in Section 2.1(f) that speak as
   of a particular date).
   
          (b)  Performance by the Company.  The Company shall
   have performed, satisfied and complied in all material respects with
   all covenants, agreements and conditions required by this Agreement
   to be performed, satisfied or complied with by the Company at or
   prior to the Closing.

          (c)  No Injunction.  No statute, rule, regulation,
   executive order, decree, ruling or injunction shall have been enacted,
   entered, promulgated or endorsed by any court of governmental
   authority of competent jurisdiction which prohibits the
   consummation of any of the transactions contemplated by this
   Agreement.
   
          (d)  Adverse Changes.  Since June 30, 1995, no event
   which had a Material Adverse Effect on the Company has occurred.
   
          (e)  No Change in Regulation S.  Regulation S shall not
   have been, nor proposed to be, amended or interpreted in a manner,
   which, in the reasonable judgment of the Purchaser, would materially
   adversely effect the purchase of the Securities by the Purchaser.
   
          (f)  No Suspension of Trading in Common Stock. The
   trading in the Common Stock shall not have been suspended by the
   SEC or the National Association of Securities Dealers, Inc. (the
   "NASD") (except for any suspension of trading of limited duration
   solely to permit dissemination of material information regarding the
   Company).
   
          (g)  Legal Opinion. The Company shall have delivered
   to the Purchaser the opinion of Warshaw Burstein Cohen Schlesinger
   & Kuh, LLP, counsel to the Company, in form and substance
   reasonably satisfactory to the Purchaser.


   
          (h)  Officer's Certificate. The Company shall have
   delivered to the Purchaser a certificate, executed by an executive
   officer of the Company, to the effect all the conditions to the closing
   shall have been satisfied.
   
          (i)  Filing of the Certificate of Designation. The
   Certificate of Designation shall have been duly filed with the
   Secretary of State of the State of Delaware and a certified copy thereof
   shall have been returned to the Company.
   

   
                          ARTICLE V
                              
                         Termination
                              
     5.1 Termination by Mutual Consent. This Agreement may be
   terminated at any time by the mutual consent of the Company and
   the Purchasers.
   
   
                         ARTICLE VI
   
                        Miscellaneous
   
     6.1  Fees and Expenses: No Brokers. Each party shall pay the
   fees and expenses of its advisers, counsel, accountants and other
   experts, if any, and all other expenses incurred by such party incident
   to the negotiation, preparation, execution, delivery and performance
   of this Agreement. The Company shall pay all stamp and other taxes
   and duties levied in connection with the issuance of the Securities
   pursuant hereto. Each party represents that it has not used the services
   of any broker in connection with this transaction, other than a broker
   as to which such party shall be solely responsible for the payment of
   any fees and expenses incurred in connection herewith.
   
     6.2  Entire Agreement; Amendments.  This Agreement,
   together with the Exhibit and Schedules attached hereto, contains the
   entire understanding of the parties with respect to the matters covered
   hereby and, except as specifically set forth herein, neither the
   Company nor the Purchasers makes any representation, warranty,
   covenant or undertaking with respect to such matters.  No provision
   of this Agreement may be waived or amended other than by a written
   instrument signed by the party against whom enforcement of any
   such amendment or waiver is sought.
   
     6.3  Notices.  Any notice or other communication required or
   permitted to be given hereunder shall be in writing and shall be
   deemed to have been received (a) upon hand delivery (receipt
   acknowledged) or delivery by telex (with correct
   answer back received), telecopy or facsimile (with transmission
   confirmation report) at the address or number designated below (if
   delivered on a business day during normal business hours where such
   notice is to be received), or the first business day following such
   delivery (if delivered other than on a business day during normal
   business hours where such notice is to be received) or (b) on the
   second business day following the date of mailing by express courier
   service, fully prepaid, addressed to such address, or upon actual

   
   receipt of such mailing, whichever shall first occur. The addresses for
   such communications shall be:
   
   
      to the Company:     Immunomedics, Inc.
                          300 American Road
                          Morris Plains, NJ 07950
                          Facsimile No.: (201) 605-8282
                          Attn: Chief Executive Officer
   
      With copies to:     Howard M. Cohen, Esq.
                          Warshaw Burstein Cohen Schlesinger & Kuh, LLP
                          555 Fifth Avenue - 11th Floor
                          New York, NY 10017
                          Facsimile No.: (212) 972-9150
   
     If to a Purchaser:  At the Address set forth on Schedule 1
   hereto.
   
   Either party hereto may from time to time change its address for
   notices under this Section 6.3 by giving at least 10 days' written
   notice of such changed address to the other party hereto.
   
     6.4  Waivers.  No waiver by either party of any default with
   respect to any provision, condition or requirement of this Agreement
   shall be deemed to be a continuing waiver in the future or a waiver
   of any other provision, condition or requirement hereof; nor shall any
   delay or omission of either party to exercise any right hereunder in
   any manner impair the exercise of any such right accruing to it
   thereafter. Any waiver must be in writing.     
   
     6.5  Headings. The headings herein are for convenience only,
   do not constitute a part of this Agreement and shall not be deemed to
   limit or affect any of the provisions hereof.
   
     6.6  Successors and Assigns. This Agreement shall be binding
   upon and inure to the benefit of the parties and their successors and
   permitted assigns.  Neither the Company nor any Purchaser shall
   assign this Agreement or any rights or obligations hereunder without
   the prior written consent of the other (which consent may be
   withheld for any reason in the sole discretion of the party from whom
   consent is sought). The assignment by a party of this Agreement or
   any rights hereunder shall not affect the obligations of such party
   under this Agreement.
   
     6.7  No Third Party Beneficiaries. This Agreement is intended
   for the benefit of the parties hereto and their respective permitted
   successors and assigns and is not for the benefit of, nor may any
   provision hereof be enforced by, any other person.
   
     6.8  Governing Law. This Agreement shall be governed by and
   construed and enforced in accordance with the internal laws of the
   State of New York without regard to the principles of conflicts of law.
   
     6.9  Availability of Equitable Remedies; Consent to
   Jurisdiction.  (a) The Company and the Purchasers agree that since a
   breach of the provisions of this Agreement could not adequately be
   compensated by money damages, any party shall be entitled, either
   before or after the Closing, in addition to any other right or remedy
   
   available to it, to an injunction restraining such breach or a
   threatened breach and to specific performance of any such provision
   of this Agreement and the parties hereby consent to the issuance of
   such injunction and to the ordering of specific performance. 
   
          (b) Each of the Company and the Purchasers hereby (i)
   irrevocably consents to the jurisdiction of the federal courts located
   in the State of New York (or the courts of the State of New York if the
   federal court decline to accept jurisdiction) in connection with any
   action or proceeding arising out of or relating to this Agreement, any
   document or instrument delivered pursuant to, in connection with, or
   simultaneously with this Agreement, or a breach of this Agreement or
   any such document or instrument and (ii) in any such action or
   proceeding, waives personal service of any summons, complaint, or
   other process and agrees that service thereof may be made in
   accordance with Section 6.3 and shall constitute good and sufficient
   service of process and notice thereof.
          
     6.10  Survival. The agreements and covenants of the Company
   and the Purchasers contained in Article III and this Article VI shall
   survive the termination of this Agreement or the consummation of the
   transactions contemplated hereby.  The representations and
   warranties of the Company and the Purchasers contained in Article II
   shall survive until a date that is one year after the Closing.
   
     6.10  Execution.  This Agreement may be executed in two or
   more counterparts, each of which shall be deemed an original for all
   purposes and any one of which may be introduced into evidence or
   used for any other purpose without the production of its duplicate
   counterpart, and all of which shall be considered one and the same
   agreement and shall become effective when counterparts have been
   signed by each party and delivered to the other party, it being
   understood that both parties need not sign the same counterpart.  In
   the event any signature is delivered by facsimile transmission, the
   party using such means of delivery shall cause four additional
   executed signature pages to be physically delivered to the other party
   within five days of the execution and delivery hereof.
   
     6.11  Publicity. The Company and the Purchasers shall consult
   with each other in issuing any press releases or otherwise making
   public statements with respect to the transactions contemplated
   hereby. Neither party shall issue any press release or otherwise make
   any public statement without the prior written consent of the other,
   which consent shall not be unreasonably withheld or delayed.
   
     6.12  Severability. In case any one or more of the provisions
   of this Agreement shall be invalid or unenforceable in any respect,
   the validity and enforceability of the remaining terms and provisions
   of this Agreement shall not in any way be affecting or impaired
   thereby and the parties will attempt to agree upon a valid and
   enforceable provision which shall be a reasonable substitute therefor,
   in light of the tenor of this Agreement, and upon so agreeing, shall
   incorporate such substitute provision in this Agreement.


     
     IN WITNESS WHEREOF, the parties hereto have caused this
   Agreement to be duly executed by their respective authorized officers
   as of the date hereof.
   
   
                              IMMUNOMEDICS, INC.
   
   
   
                              By /s/ Amy Factor            
          
                              Amy Factor
                              Executiver Vice President
   
   
   
                    PURCHASERS:
   
   
                    GERSHON PARTNERS, L.P.
   
                    By: The Palladin Group, L.P., its investment manager
                    By: Palladin Capital Management, LLC, its General Parnter
   
                    By /s/ Andy Kaplan          
          
                    Andy Kaplan
                    Vice President
   
   

                    SP INVESTORS INTERNATIONAL, N.V.,
   
                    By  /s/ Lisa Addeo            
                               
                    Lisa Addeo, as authorized oficer of Steinhardt 
                                Management Co., Inc., 
                                as agent for SP Investors International N.V.
   
   
                    
                    STEINHARDT OVERSEAS FUND, LTD.
   
                    By  /s/ Lisa Addeo            
                    
                    Lisa Addeo, as Attorney-n-fact of Michael H.
                                Steinhardt, General Partner, 
                                of Steinhardt Overseas Management,
                                L.P., as agent for Steinhardt 
                                Overseads Fund, Ltd.
                                  


Title:              MIDLAND WALWYN CAPITAL, INC.
   
                    By  /s/ David Rarvis         
                    
                    David Jarvisame: Vice President & Manager 
                                     - Equity Derivatives                      
                            
                            
                            
                            Schedule 1
   
   Name and Address of Purchaser        Shares     Aggregate Purchase Price
   
   Gershon Partners, L.P.               30,000         $1,500,000
   c/o CITCO Fund Services Ltd.
   Corporate Centre
   West Bay Road
   P.O. Box 31106 SMB
   Grand Cayman, Cayman Islands
   
   SP Investors International, N.V.     60,000         $3,000,000
   c/o WW Asset Management
   129 Front Street
   Hamilton, Bermuda 5-31
   
   Steinhardt Overseas Fund, Ltd.       60,000         $3,000,000
   c/o WW Asset Management
   129 Front Street
   Hamilton, Bermuda 5-31
   
   Midland Walwyn Capital Inc.          50,000         $2,500,000
   BCE Place 181 Bay Street, Suite 500
   Toronto, Ontario
   Canada M5J2V8


                       Schedule 2.1(a)
   
   Name of Subsidiary                   Jurisdiction of Incorporation
   
   Immunomedics Ltd.                         Israel
    (inactive corporation)
   
   Immunomedics, B.V.                        Netherlands
    (in process of formation)
       

                               Schedule 2.1(c)
   
   
                Capitalization of the Company
   
   Issued and Class                     Authorized               Outstanding
   
   Preferred Stock, $.01 par value      10,000,000
   
      Series B convertible                 200,000                   5,267
   
      Series C convertible                 200,000                       0
   
   
   Common Stock, $.01 par value         50,000,000              32,727,749
      par value
   
   
           Outstanding Options Warrants and Rights
   
   
     The Company has outstanding options to purchase 2,157,750
   shares of Common Stock, at prices ranging from $2.25 to $10.75.