BIOMERICA INC
SC 13D/A, 1998-05-26
DENTAL EQUIPMENT & SUPPLIES
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                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13D
                                 Amendment No. 1

                    Under the Securities Exchange Act of 1934


                                 Biomerica Inc.
                                (Name of Issuer)


                     Common Stock, par value $.08 per share
                         (Title of Class of Securities)

                                    09061H307
                                 (CUSIP Number)


                    Paramount Capital Asset Management, Inc.
                         c/o Lindsay A. Rosenwald, M.D.
                               787 Seventh Avenue
                               New York, NY 10019
                                 (212) 554-4300
                                 with a copy to:

                              David R. Walner, Esq.
                    Paramount Capital Asset Management, Inc.
                               787 Seventh Avenue
                               New York, NY 10019
                                 (212) 554-4372

           (Name, Address and Telephone Number of Person Authorized to
                       Receive Notices and Communications)


                                  May 15, 1998
             (Date of Event which Requires Filing of this Statement)



If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which  is the  subject  of  this  Statement  because  of  Rule
13d-1(b)(3) or (4), check the following:
                                                                     [_]

Check the following box if a fee is being paid with this Statement:
                                                                     [_]


                                  Page 1 of 13

<PAGE>

                                       13D
CUSIP No. 09061H307                                           Page 2 of 13 Pages
- --------------------------------------------------------------------------------
1)  NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
    Paramount Capital Asset Management, Inc.
- --------------------------------------------------------------------------------
2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a)   [_]
                                                     (b)   [_]
- --------------------------------------------------------------------------------
3)  SEC USE ONLY

- --------------------------------------------------------------------------------
4)  SOURCE OF FUNDS*
    OO (see Item 3 below)
- --------------------------------------------------------------------------------
5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
    ITEMS 2(d) OR 2(e)                                                [_]
- --------------------------------------------------------------------------------
6)  CITIZENSHIP OR PLACE OF ORGANIZATION
    Delaware
- --------------------------------------------------------------------------------
                   7)   SOLE VOTING POWER
                    
  NUMBER OF             None
    SHARES        --------------------------------------------------------------
 BENEFICIALLY      8)   SHARED VOTING POWER
   OWNED BY         
EACH REPORTING          191,593
    PERSON        --------------------------------------------------------------
     WITH          9)   SOLE DISPOSITIVE POWER
                        None
                  --------------------------------------------------------------
                  10)   SHARED DISPOSITIVE POWER
                        191,593
- --------------------------------------------------------------------------------
11)      AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH REPORTING PERSON 
         191,593
- --------------------------------------------------------------------------------
12)      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES*                                                  [_]
- --------------------------------------------------------------------------------
13)      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         4.8%
- --------------------------------------------------------------------------------
14)      TYPE OF REPORTING PERSON*
         CO
- --------------------------------------------------------------------------------


<PAGE>


                                       13D
CUSIP No. 09061H307                                           Page 3 of 13 Pages
- --------------------------------------------------------------------------------
1)  NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
    Aries Domestic Fund L.P.
- --------------------------------------------------------------------------------
2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a)   [_]
                                                     (b)   [_]
- --------------------------------------------------------------------------------
3)  SEC USE ONLY

- --------------------------------------------------------------------------------
4)  SOURCE OF FUNDS*
    OO (see Item 3 below)
- --------------------------------------------------------------------------------
5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
    ITEMS 2(d) OR 2(e)                                                [_]
- --------------------------------------------------------------------------------
6)  CITIZENSHIP OR PLACE OF ORGANIZATION
    Delaware
- --------------------------------------------------------------------------------
                   7)   SOLE VOTING POWER
                    
  NUMBER OF             None
    SHARES        --------------------------------------------------------------
 BENEFICIALLY      8)   SHARED VOTING POWER
   OWNED BY         
EACH REPORTING          66,211
    PERSON        --------------------------------------------------------------
     WITH          9)   SOLE DISPOSITIVE POWER
                        None
                  --------------------------------------------------------------
                  10)   SHARED DISPOSITIVE POWER
                        66,211
- --------------------------------------------------------------------------------
11)      AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH REPORTING PERSON 
         66,211
- --------------------------------------------------------------------------------
12)      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES*                                                  [_]
- --------------------------------------------------------------------------------
13)      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         1.6%
- --------------------------------------------------------------------------------
14)      TYPE OF REPORTING PERSON*
         PN
- --------------------------------------------------------------------------------

<PAGE>


                                       13D
CUSIP No. 09061H307                                           Page 4 of 13 Pages
- --------------------------------------------------------------------------------
1)  NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
    The Aries Trust
- --------------------------------------------------------------------------------
2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a)   [_]
                                                     (b)   [_]
- --------------------------------------------------------------------------------
3)  SEC USE ONLY

- --------------------------------------------------------------------------------
4)  SOURCE OF FUNDS*
    OO (see Item 3 below)
- --------------------------------------------------------------------------------
5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
    ITEMS 2(d) OR 2(e)                                                [_]
- --------------------------------------------------------------------------------
6)  CITIZENSHIP OR PLACE OF ORGANIZATION
    Cayman Islands
- --------------------------------------------------------------------------------
                   7)   SOLE VOTING POWER
                    
  NUMBER OF             None
    SHARES        --------------------------------------------------------------
 BENEFICIALLY      8)   SHARED VOTING POWER
   OWNED BY         
EACH REPORTING          125,382
    PERSON        --------------------------------------------------------------
     WITH          9)   SOLE DISPOSITIVE POWER
                        None
                  --------------------------------------------------------------
                  10)   SHARED DISPOSITIVE POWER
                        125,382
- --------------------------------------------------------------------------------
11)      AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH REPORTING PERSON 
         125,382
- --------------------------------------------------------------------------------
12)      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES*                                                  [_]
- --------------------------------------------------------------------------------
13)      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         3.1%
- --------------------------------------------------------------------------------
14)      TYPE OF REPORTING PERSON*
         OO (see Item 2)
- --------------------------------------------------------------------------------

<PAGE>

                                       13D
CUSIP No. 09061H307                                           Page 5 of 13 Pages
- --------------------------------------------------------------------------------
1)  NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
    Lindsay A. Rosenwald M.D.
- --------------------------------------------------------------------------------
2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a)   [_]
                                                     (b)   [_]
- --------------------------------------------------------------------------------
3)  SEC USE ONLY

- --------------------------------------------------------------------------------
4)  SOURCE OF FUNDS*
    OO (see Item 3 below)
- --------------------------------------------------------------------------------
5)  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
    ITEMS 2(d) OR 2(e)                                                [_]
- --------------------------------------------------------------------------------
6)  CITIZENSHIP OR PLACE OF ORGANIZATION
    United States
- --------------------------------------------------------------------------------
                   7)   SOLE VOTING POWER
                    
  NUMBER OF             None
    SHARES        --------------------------------------------------------------
 BENEFICIALLY      8)   SHARED VOTING POWER
   OWNED BY         
EACH REPORTING          191,593
    PERSON        --------------------------------------------------------------
     WITH          9)   SOLE DISPOSITIVE POWER
                        None
                  --------------------------------------------------------------
                  10)   SHARED DISPOSITIVE POWER
                        191,593
- --------------------------------------------------------------------------------
11)      AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH REPORTING PERSON 
         191,593
- --------------------------------------------------------------------------------
12)      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES*                                                  [_]
- --------------------------------------------------------------------------------
13)      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         4.8%
- --------------------------------------------------------------------------------
14)      TYPE OF REPORTING PERSON*
         IN
- --------------------------------------------------------------------------------

<PAGE>



Item 1.  Security and Issuer.

          (a)  Common Stock, $.08 par value ("Shares")

               Biomerica Inc.
               1533 Monrovia Avenue
               Newport Beach, CA 92663
               714-645-2111

Item 2.  Identity and Background.

         Names of Persons Filing:

          (a)  This  statement  is filed on behalf of  Paramount  Capital  Asset
               Management, Inc. ("Paramount Capital"), Aries Domestic Fund, L.P.
               ("Aries  Domestic"),  The Aries  Trust  ("Aries  Trust")  and Dr.
               Lindsay A. Rosenwald  (collectively,  "Reporting  Parties").  See
               attached  Exhibit A which is a copy of their agreement in writing
               to file this statement on behalf of each of them.

          (b)  The business address of Paramount Capital, Aries Domestic and Dr.
               Rosenwald's  is 787 Seventh  Avenue,  48th Floor,  New York,  New
               York,  10019.  The  business  address  for  Aries  Trust  is  c/o
               MeesPierson  (Cayman)  Limited,  P.O. Box 2003,  British American
               Centre, Phase 3, Dr. Roy's Drive, George Town, Grand Cayman.

          (c)  Dr. Rosenwald is an investment banker,  venture capitalist,  fund
               manager and sole shareholder of Paramount  Capital,1 a Subchapter
               S corporation  incorporated  in the State of Delaware.  Paramount
               Capital  is the  General  Partner of Aries  Domestic,2  a limited
               partnership  incorporated in Delaware.  Paramount  Capital is the
               Investment Manager to Aries Trust,3 a Cayman Islands Trust.


          (d)  Dr. Rosenwald,  Paramount Capital, Aries Domestic and Aries Trust
               and  their  respective  officers,  directors,  general  partners,
               investment managers,  or trustees have not, during the five years
               prior to the date hereof, been convicted in a criminal proceeding
               (excluding traffic violations or similar misdemeanors).

          (e)  Dr. Rosenwald,  Paramount Capital, Aries Domestic and Aries Trust
               and  their  respective  officers,  directors,  general  partners,
               investment  managers,  or trustees have not been, during the five
               years prior to the date hereof,  parties to a civil proceeding of
               a judicial or administrative body of competent jurisdiction, as a
               result of which such  person  was or is  subject  to a  judgment,
               decree  or  final  order  enjoining  future   violations  of,  or
               prohibiting or mandating

- -------------------------------

1    Please  see  attached  Exhibit B  indicating  the  executive  officers  and
     directors  of Paramount  Capital and  providing  information  called for by
     Items 2-6 of this statement as to said officers and directors. Exhibit B is
     herein incorporated by reference.


2    Please see  attached  Exhibit C  indicating  the  general  partner of Aries
     Domestic and the general  partner's  executive  officers and  directors and
     providing  information called for by Items 2-6 of this statement as to said
     general partners, officers and directors.  Exhibit C is herein incorporated
     by reference.


3    Please see attached  Exhibit D  indicating  the  investment  manager of the
     Aries Trust and the investment  manager's  executive officers and directors
     and providing  information  called for by Items 2-6 of this statement as to
     said  investment  manager and officers and  directors.  Exhibit D is herein
     incorporated by reference.

                                        6

<PAGE>

               activities  subject  to,  Federal  or  State  securities  laws or
               finding any violation with respect to such laws.

          (f)  Dr. Rosenwald is a citizen of the United States.

Item 3.  Source and Amount of Funds or Other Consideration.

               Since  the  date of the  original  filing  of a  Schedule  13D on
               January 3, 1997,  Aries  Domestic  disposed  of an  aggregate  of
               44,900  shares of common  stock of the  Issuer  in  various  open
               market  transactions and the Aries Trust disposed of an aggregate
               of 207,951  shares of common  stock of the Issuer in various open
               market transactions.

Item 4.  Purpose of Transaction.

               The  Reporting  Parties  acquired  shares of Common  Stock of the
               Issuer as an investment in the Issuer.

               Although the Reporting Parties have not formulated any definitive
               plans, they may from time to time acquire,  or dispose of, Common
               Stock and/or other securities of the Issuer if and when they deem
               it  appropriate.   The  Reporting  Parties  may  formulate  other
               purposes,  plans or proposals  relating to any of such securities
               of the Issuer to the extent  deemed  advisable in light of market
               conditions, investment policies and other factors.

               Except as indicated in this Schedule  13D, the Reporting  Parties
               currently  have no plans or  proposals  that  relate  to or would
               result  in any of the  matters  described  in  subparagraphs  (a)
               through (j) of Item 4 of Schedule 13D.

Item 5.  Interest in Securities of the Issuer.

               (a)  As  of  December  23,  1996,  Dr.  Rosenwald  and  Paramount
                    Capital,  through  acquisition  of the  shares  by the Aries
                    Trust and Aries Domestic,  beneficially owned 333,333 shares
                    or 8.6% of the Issuer's  securities  and Aries  Domestic and
                    the Aries Trust beneficially owned as follows:

                                                         Amount Owned
                    Aries Domestic                         66,211 Shares
                    Aries Trust                           125,382 Shares

               (b)  Dr. Rosenwald and Paramount  Capital share the power to vote
                    or  to  direct  the  vote,  to  dispose  or  to  direct  the
                    disposition  of those shares owned by each of Aries Domestic
                    and Aries Trust.

               (c)  The following  sales were made by Aries Domestic in the open
                    market in the past 60 days:

                     Date                No. of Shares              Sales Price
                     5/15/98                  16,500                 1.675
                     5/18/98                  25,000                 1.6875

                                        7

<PAGE>

                    The following  sales were made by Aries Domestic in the open
                    market in the past 60 days:

                    Date               No. of Shares              Sales Price
                    5/15/98                 33,500                 1.675
                    5/18/98                 50,000                 1.6875

                    Other than as set forth  herein the  Reporting  Parties have
                    not engaged in any  transactions  in the Common Stock of the
                    Issuer.

               (d)  As a result of sales  made on May 18,  1998,  the  Reporting
                    Parties ceased to beneficially own more than five percent of
                    the Issuer's common stock.


Item 6.  Contracts, Arrangements, Understandings or Relationships
         with respect to Securities of the Issuer

               Paramount  Capital is the  investment  manager of the Aries Trust
               and the General  Partner of Aries Domestic and in such capacities
               has the authority to make certain investment  decisions on behalf
               of such entities,  including decisions relating to the securities
               of the  Issuer.  In  connection  with its  investment  management
               duties,  Paramount  Capital receives certain  management fees and
               performance  allocations from the Aries Trust and Aries Domestic.
               Dr.  Rosenwald  is the sole  shareholder  of  Paramount  Capital.
               Except  as  indicated  in this  13D  and  exhibits,  there  is no
               contract, arrangement,  understanding or relationship between the
               Reporting  Parties  and any other  person,  with  respect  to any
               securities of the Issuer.


Item 7.  Material to be Filed as Exhibits:

Exhibit A -    Copy of an  Agreement  between  Dr.  Rosenwald,  Paramount
               Capital, Aries Domestic and Aries Trust to file this Statement
               on Schedule 13D on behalf of each of them.

Exhibit B -    List of  executive  officers  and  directors  of Paramount
               Capital  and  information  called  for by  Items  2-6 of  this
               statement relating to said officers and directors.

Exhibit C -    List of executive officers and directors of Aries Domestic
               and  information  called  for by Items  2-6 of this  statement
               relating to said officers and directors.

Exhibit D -    List of executive  officers  and  directors of Aries Trust
               and  information  called  for by Items  2-6 of this  statement
               relating to said officers and directors.

                                        8

<PAGE>

                                   SIGNATURES


         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.


                                     PARAMOUNT CAPITAL ASSET MANAGEMENT, INC.

Dated:  May 19, 1998
        New York, NY                 By /s/ Lindsay A. Rosenwald, M.D.
                                        ------------------------------
                                        Lindsay A. Rosenwald, M.D.
                                        President


                                     ARIES DOMESTIC FUND,  L.P.
                                     By Paramount Capital Asset Management, Inc.
                                        General Partner

Dated:  May 19, 1998
        New York, NY                  By /s/ Lindsay A. Rosenwald, M.D.
                                         ------------------------------
                                         Lindsay A. Rosenwald, M.D.
                                         President


                                     THE ARIES TRUST
                                     By Paramount Capital Asset Management, Inc.
                                     Investment Manager

Dated:  May 19, 1998
        New York, NY                  By /s/ Lindsay A. Rosenwald, M.D.
                                         ------------------------------
                                         Lindsay A. Rosenwald, M.D.
                                         President


Dated:  May 19, 1998
        New York, NY                  By  /s/ Lindsay A. Rosenwald, M.D.
                                          ------------------------------
                                          Lindsay A. Rosenwald, M.D.

                                        9
<PAGE>



                                    EXHIBIT A

                                    AGREEMENT

                          JOINT FILING OF SCHEDULE 13D


         The  undersigned  hereby  agrees  to  jointly  prepare  and  file  with
regulatory  authorities  a  Schedule  13D  and  any  future  amendments  thereto
reporting each of the undersigned's ownership of securities of Biomerica,  Inc.,
and hereby affirm that such Schedule 13D is being filed on behalf of each of the
undersigned.

                                     PARAMOUNT CAPITAL ASSET MANAGEMENT, INC.

Dated:  May 19, 1998
        New York, NY                 By /s/ Lindsay A. Rosenwald, M.D.
                                        ------------------------------
                                        Lindsay A. Rosenwald, M.D.
                                        President


                                     ARIES DOMESTIC FUND, L.P.
                                     By Paramount Capital Asset Management, Inc.
                                        General Partner

Dated:  May 19, 1998
        New York, NY                  By /s/ Lindsay A. Rosenwald, M.D.
                                         ------------------------------
                                         Lindsay A. Rosenwald, M.D.
                                         President


                                     THE ARIES TRUST
                                     By Paramount Capital Asset Management, Inc.
                                     Investment Manager

Dated:  May 19, 1998
        New York, NY                  By /s/ Lindsay A. Rosenwald, M.D.
                                         ------------------------------
                                         Lindsay A. Rosenwald, M.D.
                                         President


Dated:  May 19, 1998
        New York, NY                  By  /s/ Lindsay A. Rosenwald, M.D.
                                          ------------------------------
                                          Lindsay A. Rosenwald, M.D.


                                       10

<PAGE>


                                    EXHIBIT B

        The name and principal occupation or employment,  which in each instance
is with Paramount Capital Asset Management,  Inc. ("Paramount  Capital") located
at 787 Seventh Avenue,  48th Floor, New York, New York, 10019, of each executive
officer and director of Paramount Capital is as follows:

                                                   PRINCIPAL OCCUPATION
        NAME                                          OR EMPLOYMENT

Lindsay A. Rosenwald, M.D.         Chairman of the Board, President of Paramount
                                   Capital Asset Management, Inc., Paramount
                                   Capital Investments, LLC and Paramount
                                   Capital, Inc.

Peter Morgan Kash                  Director of Paramount Capital Asset
                                   Management, Inc., Senior Managing Director,
                                   Paramount Capital, Inc.

Dr. Yuichi Iwaki                   Director of Paramount Capital Asset
                                   Management, Inc., Professor, University of
                                   Southern California School of Medicine


Item 2.

         During  the five  years  prior to the date  hereof,  none of the  above
persons  (to the best of  Paramount  Capital's  knowledge)  was  convicted  in a
criminal  proceeding  (excluding traffic violations or similar  misdemeanors) or
was a party  to a civil  proceeding  of a  judicial  or  administrative  body of
competent jurisdiction,  as a result of which such person was or is subject to a
judgment,  decree or final order enjoining future  violations of, or prohibiting
or mandating  activities subject to, Federal or State securities laws or finding
any violation with respect to such laws.

Items 3-6.

         Please refer to Items 3-6 herein reporting the beneficial ownership.


                                       11
<PAGE>


                                    EXHIBIT C

         The name and principal  occupation or  employment,  which is located at
787  Seventh  Avenue,  48th Floor,  New York,  New York,  10019,  of the General
Partner of Aries Domestic is as follows:

                                                      PRINCIPAL OCCUPATION
        NAME                                             OR EMPLOYMENT

Paramount Capital Asset Management, Inc      General Partner; Investment Manager

         Exhibit B is hereby incorporated by reference.

Item 2.

         During the five years prior to the date  hereof,  the above  person (to
the best of Aries  Domestic's  knowledge)  has not been  convicted in a criminal
proceeding (excluding traffic violations or similar misdemeanors) or was a party
to a  civil  proceeding  of a  judicial  or  administrative  body  of  competent
jurisdiction,  as a result of which such person was or is subject to a judgment,
decree  or final  order  enjoining  future  violations  of,  or  prohibiting  or
mandating activities subject to, Federal or State securities laws or finding any
violation with respect to such laws.

Items 3-6.

         Please refer to Items 3-6 herein reporting the beneficial ownership.

                                       12

<PAGE>

                                    EXHIBIT D

        The name and principal  occupation or  employment,  which in the case of
Paramount Capital Asset Management,  Inc. is located at 787 Seventh Avenue, 48th
Floor,  New York, New York,  10019,  of each  executive  officer and director of
Aries Trust is as follows:

                                                         PRINCIPAL OCCUPATION
        NAME                                                OR EMPLOYMENT

Paramount Capital Asset Management, Inc.                  Investment Manager

MeesPierson (Cayman) Limited                              Trustee
P.O. Box 2003
British American Centre
Phase 3, Dr. Roy's Drive
George Town, Grand Cayman

        Exhibit B is hereby incorporated by reference.

Item 2.

        During the five  years  prior to the date  hereof,  neither of the above
persons  (to the best of Aries  Trust's  knowledge)  have  been  convicted  in a
criminal  proceeding  (excluding traffic violations or similar  misdemeanors) or
was a party  to a civil  proceeding  of a  judicial  or  administrative  body of
competent jurisdiction,  as a result of which such person was or is subject to a
judgment,  decree or final order enjoining future  violations of, or prohibiting
or mandating  activities subject to, Federal or State securities laws or finding
any violation with respect to such laws.

Items 3-6.

        Please refer to Items 3-6 herein reporting the beneficial ownership.

                                       13



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