MATRITECH INC/DE/
SC 13D/A, 1996-02-16
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                     [FILED VIA EDGAR ON FEBRUARY 16, 1996]

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13D


                   Under the Securities Exchange Act of 1934

                               (Amendment No. 1)


                                MATRITECH, INC.
                                ---------------
                                (Name of Issuer)

                          Common Stock, $.01 Par Value
                          ----------------------------
                         (Title of Class of Securities)

                                   576818108
                     -------------------------------------
                     (CUSIP Number of Class of Securities)

                               Lawrence A. Bowman
                        Spinnaker Technology Fund, L.P.
                      c/o SoundView Asset Management, Inc.
                               22 Gatehouse Road
                          Stamford, Connecticut 06092
                                 (203) 462-7250
           ---------------------------------------------------------
           (Name, Address and Telephone Number of Persons Authorized
                     to Receive Notices and Communications)

                                With a copy to:

                              David P. Falck, Esq.
                      Winthrop, Stimson, Putnam & Roberts
                             One Battery Park Plaza
                         New York, New York 10004-1490
                                 (212) 858-1000

                               February 9, 1996
                         -----------------------------
                         (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
         Schedule 13D, and is filing this Schedule  because of Rule  13d-1(b)(3)
         or (4), check the following box: |_|

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

                            Exhibit Index on Page 10


                               Page 1 of 11 Pages

<PAGE>



                                  SCHEDULE 13D


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

CUSIP NO. 576818108
- -----------------------------
================================================================================
  1.        NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

               Spinnaker Technology Fund, L.P.
- --------------------------------------------------------------------------------
  2.        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) o
                                                                         (b) |X|
- --------------------------------------------------------------------------------
  3.        SEC USE ONLY

- --------------------------------------------------------------------------------
  4.        SOURCE OF FUNDS

               WC
- --------------------------------------------------------------------------------
  5.        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
            PURSUANT TO ITEMS 2(d) OR 2(e)                                   o

- --------------------------------------------------------------------------------
  6.        CITIZENSHIP OR PLACE OF ORGANIZATION

               Delaware
- --------------------------------------------------------------------------------
                             7.        SOLE VOTING POWER

                                            600,000
                         -------------------------------------------------------
         NUMBER OF           8.        SHARED VOTING POWER
          SHARES
       BENEFICIALLY                         -0-
         OWNED BY        -------------------------------------------------------
           EACH              9.        SOLE DISPOSITIVE POWER
        REPORTING         
       PERSON WITH                          600,000
                         -------------------------------------------------------
                            10.        SHARED DISPOSITIVE POWER

                                            -0-
- --------------------------------------------------------------------------------
 11.        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

               600,000
- --------------------------------------------------------------------------------
 12.        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
            SHARES                                                           o

- --------------------------------------------------------------------------------
 13.        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

               4.7%
- --------------------------------------------------------------------------------
 14.        TYPE OF REPORTING PERSON

               PN
================================================================================


                               Page 2 of 11 Pages

<PAGE>



                                  SCHEDULE 13D


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

CUSIP NO. 576818108
- -----------------------------
================================================================================
  1.        NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

               SoundView Asset Management, Inc.
- --------------------------------------------------------------------------------
  2.        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) o
                                                                         (b) |X|
- --------------------------------------------------------------------------------
  3.        SEC USE ONLY

- --------------------------------------------------------------------------------
  4.        SOURCE OF FUNDS

               AF
- --------------------------------------------------------------------------------
  5.        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
            PURSUANT TO ITEMS 2(d) OR 2(e)                                   o

- --------------------------------------------------------------------------------
  6.        CITIZENSHIP OR PLACE OF ORGANIZATION

               Delaware
- --------------------------------------------------------------------------------
                             7.        SOLE VOTING POWER

                                            600,000
                         -------------------------------------------------------
         NUMBER OF           8.        SHARED VOTING POWER
          SHARES
       BENEFICIALLY                         -0-
         OWNED BY        -------------------------------------------------------
           EACH              9.        SOLE DISPOSITIVE POWER
        REPORTING
       PERSON WITH                          600,000
                         -------------------------------------------------------
                            10.        SHARED DISPOSITIVE POWER

                                            -0-
- --------------------------------------------------------------------------------
 11.        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

               600,000
- --------------------------------------------------------------------------------
 12.        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
               SHARES                                                        o

- --------------------------------------------------------------------------------
 13.        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

               4.7%
- --------------------------------------------------------------------------------
 14.        TYPE OF REPORTING PERSON

               CO
================================================================================


                               Page 3 of 11 Pages

<PAGE>



Item 1.           Security and Issuer.

                  The class of equity securities to which this Statement relates
is the  common  stock,  $.01 par  value  per  share  (the  "Common  Stock"),  of
Matritech, Inc., a Delaware corporation (the "Company"), which has its principal
executive offices at 763 Concord Avenue, Cambridge, Massachusetts 02138.


Item 2.           Identity and Background.

                  This  Statement is being filed in  connection  with the Common
Stock  beneficially held by Spinnaker  Technology Fund, L.P., a Delaware limited
partnership  ("Spinnaker").   Spinnaker  conducts  its  principal  business  and
maintains its principal office at 22 Gatehouse Road, Stamford, Connecticut
06902.

                  The sole  general  partner of  Spinnaker  is  SoundView  Asset
Management,  Inc.,  a Delaware  corporation  ("SoundView"),  which  conducts its
principal  business and  maintains its  principal  office at 22 Gatehouse  Road,
Stamford,  Connecticut  06902.  All business of Spinnaker is conducted under the
complete and  exclusive  control of  SoundView.  (Spinnaker  and  SoundView  are
sometimes hereinafter referred to as the "Filers").

                  Spinnaker  was formed in 1994 for the  principal  business  of
providing  an  investment  vehicle  for  institutional  and other  sophisticated
investors to acquire equity  interests in companies with  significant  potential
for long-term growth in value in the technology  industry.  SoundView was formed
in 1994 for the principal business of serving as the general partner and manager
of various investment funds and portfolios.

                  The name,  business address,  present principal  occupation or
employment of each  executive  officer and director of SoundView is set forth in
Schedule  I  hereto,  which is  incorporated  herein by  reference.  Each of the
individuals listed in Schedule I hereto are U.S. citizens.

                  During the past five years,  none of the Filers nor any of the
executive  officers  or  directors  of the  Filers (i) has been  convicted  in a
criminal proceeding (excluding traffic violations or similar  misdemeanors),  or
(ii) was a party to a civil proceeding of a judicial or  administrative  body of
competent jurisdiction and, as a result of such proceeding, was or is subject to
a judgment, decree or final order enjoining future violations of, or prohibiting
or

                               Page 4 of 11 Pages

<PAGE>



mandating activities subject to, federal or state securities laws or finding any
violation with respect to such laws.


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

                  Not applicable.


Item 4.           Purpose of Transaction.

                  Not applicable.


Item 5.           Interest in Securities of the Issuer.

                  (a) and (b) The  number of shares of Common  Stock  issued and
outstanding and the percentage  calculations  resulting therefrom in this Item 5
are based on information  received from the Company.  According to the Company's
most recent periodical  report filed under the Securities  Exchange Act of 1934,
as amended,  as of December 31, 1995, there were 12,788,637 shares of the Common
Stock issued and outstanding.

                  Since early  December 1995 to the date hereof,  Spinnaker sold
440,350  shares of the  Common  Stock in open  market  transactions.  Currently,
Spinnaker  beneficially  owns  600,000  shares  of  Common  Stock,  representing
approximately  4.7% of the Common Stock issued and  outstanding.  Spinnaker  has
sole voting and dispositive  power with respect to all Common Stock owned by it,
which power is exercised by its general partner, SoundView.

                  SoundView may be deemed to beneficially  own all the shares of
Common Stock owned by Spinnaker by virtue of its status as sole general  partner
of Spinnaker.  Such deemed  beneficial  ownership  would total  600,000  shares,
representing  approximately  4.7% of the Common  Stock  issued and  outstanding.
SoundView disclaims beneficial  ownership of such shares.  SoundView may also be
deemed in its capacity as general partner of Spinnaker to share the voting power
and the power to direct the  disposition  of the shares of Common Stock owned by
Spinnaker.

                  (c) Except as set forth above, none of the Filers has effected
any transactions in shares of Common Stock during the past 60 days.

                  (d) To the best knowledge of the Filers,  no person other than
the  Filers  has the right to  receive  or the power to direct  the  receipt  of
dividends from, or the proceeds from, the sale of shares of Common Stock.

                               Page 5 of 11 Pages

<PAGE>




                  (e) The Filers ceased to be the beneficial owners of more than
five percent of the Common Stock on February 9, 1996.


Item 6.           Contracts, Arrangements,  Understandings or Relationships With
                  Respect to Securities of the Issuer.

                  Pursuant  to the  Securities  Purchase  Agreement  dated as of
September  28,  1995  between the Company  and  Spinnaker,  the Company  filed a
registration  statement  under the Securities Act of 1933, as amended,  covering
the sale of the  Common  Stock held by  Spinnaker.  The  registration  statement
became effective in early December, 1995.


Item 7.           Material to be Filed as Exhibits.

         Exhibit A:                 Agreement pursuant to Rule 13d-1(f)(1).

         Exhibit B:                 Securities Purchase Agreement between
                                    Matritech, Inc. and Spinnaker Technology
                                    Fund, L.P., dated September 28, 1995
                                    (incorporated by reference from Exhibit
                                    No. 10 to the Company's Current Report on
                                    Form 8-K dated September 29, 1995, File
                                    No. 0-19921).

                               Page 6 of 11 Pages

<PAGE>



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


Date:  February 15, 1996

                                    SPINNAKER TECHNOLOGY FUND, L.P.

                                    By: SoundView Asset Management, Inc.,
                                         Its General Partner



                                        By: /s/ Lawrence A. Bowman
                                            ----------------------
                                            Lawrence A. Bowman
                                            President






                               Page 7 of 11 Pages

<PAGE>



                                   SIGNATURE
                                   ---------

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


Date:  February 15, 1996


                                    SOUNDVIEW ASSET MANAGEMENT, INC.



                                    By:  /s/ Lawrence A. Bowman
                                         ----------------------
                                         Lawrence A. Bowman
                                         President


                               Page 8 of 11 Pages

<PAGE>



                                   SCHEDULE I

          INFORMATION WITH RESPECT TO DIRECTORS AND EXECUTIVE OFFICERS
                      OF SOUNDVIEW ASSET MANAGEMENT, INC.

DIRECTORS AND EXECUTIVE OFFICERS:


                  The following table sets forth the name,  business address and
present principal  occupation or employment of each of the current directors and
executive officers of SoundView Asset Management, Inc. All business of Spinnaker
Technology  Fund, L.P. is conducted under the complete and exclusive  control of
SoundView Asset Management, Inc., its General Partner.

                                                   PRESENT PRINCIPAL OCCUPATION
         NAME                                             OR EMPLOYMENT
         ----                                      ----------------------------


Lawrence A. Bowman                                 President and Director of
SoundView Asset Management, Inc.                   SoundView Asset Management,
22 Gatehouse Road                                  Inc.
Stamford, Connecticut 06092

Kerry Tyler                                        Secretary and Treasurer of
SoundView Asset Management, Inc.                   SoundView Asset Management,
22 Gatehouse Road                                  Inc.
Stamford, Connecticut 06092

James B. Townsend                                  Director of SoundView
SoundView Asset Management, Inc.                   Asset Management, Inc.
22 Gatehouse Road
Stamford, Connecticut 06092


Russell D. Crabs                                   Director of SoundView
SoundView Asset Management, Inc.                   Asset Management, Inc.
22 Gatehouse Road
Stamford, Connecticut 06092












                               Page 9 of 11 Pages

<PAGE>



                                 EXHIBIT INDEX
                                 -------------

       Exhibit                                                            Page
       Number                       Documents                            Number
       -------                      ---------                            ------

          A            Agreement pursuant to Rule 13d-1(f)(1)              11
          B            Securities Purchase Agreement between
                       Matritech, Inc. and Spinnaker Technology
                       Fund,  L.P.,  dated September 28, 1995
                       (incorporated by reference  from Exhibit
                       No. 10 to the Company's  Current Report on
                       Form 8-K dated September 29, 1995, File
                       No. 0-19921).







                              Page 10 of 11 Pages

<PAGE>


                                                                      Exhibit A


                                   AGREEMENT

                  Pursuant  to  Rule   13d-1(f)(1)(iii)   of  Regulation   13D-G
promulgated under the Securities  Exchange Act of 1934, as amended,  each of the
undersigned  agrees that the  Statement  to which this  Exhibit A is attached is
filed on its behalf.

Date:  February 15, 1996


SPINNAKER TECHNOLOGY FUND,
L.P.

By: SoundView Asset
Management, Inc.,
       Its General Partner


By:  /s/ Lawrence A. Bowman
    -----------------------
     Lawrence A. Bowman
     President




SOUNDVIEW ASSET MANAGEMENT,
INC.


By:  /s/ Lawrence A. Bowman
    -----------------------
     Lawrence A. Bowman
     President






                              Page 11 of 11 Pages

<PAGE>





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