<TABLE>
<S> <C>
OMB APPROVAL
OMB Number: 3235-0145
UNITED STATES Expires: October 31, 1997
SECURITIES AND EXCHANGE COMMISSION Estimated average burden
WASHINGTON, D.C. 20549 hours per form............14.90
-------------------------------
</TABLE>
SCHEDULE 13D
UNDER THE SECURITIES EXCHANGE ACT OF 1934*
(AMENDMENT NO. 4)
BioWhittaker, Inc.
- --------------------------------------------------------------------------------
(Name of Issuer)
Common Stock, $.01 par value
- --------------------------------------------------------------------------------
(Title of Class of Securities)
09066T108
-------------------------------------------------------
(CUSIP Number)
Douglas Schloss, Marcus Schloss & Co., Inc.
One Whitehall Street, New York, New York 10004
- --------------------------------------------------------------------------------
(Name, Address and Telephone Number of Person Authorized
to Receive Notices and Communications)
August 27, 1997
-------------------------------------------------------
(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 the statement |_|. (A fee is
not required only if the reporting person: (1) has a previous statement on file
reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)
NOTE: Six copies of this statement, including all exhibits, should be filed with
the Commission. See Rule 13d-1(a) for other parties to whom copies are to be
sent.
- ------------
* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.
The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).
SEC 1746(12-91)
Page 1 of 16
(Exhibit Index appears at page 14)
<PAGE>
SCHEDULE 13D
CUSIP NO. 09066T108 PAGE 2 OF 16 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Rexford Management, Inc.
TP# - 13-3749470
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(A) |_|
(B) |_|
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
OO,WC,BK
- --------------------------------------------------------------------------------
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
- --------------------------------------------------------------------------------
NUMBER OF 7 SOLE VOTING POWER
SHARES
BENEFICIALLY 629,600**
OWNED BY ----------------------------------------------------------
EACH
REPORTING 8 SHARED VOTING POWER
PERSON
WITH ----------------------------------------------------------
9 SOLE DISPOSITIVE POWER
629,600**
----------------------------------------------------------
10 SHARED DISPOSITIVE POWER
- --------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
629,600**
- --------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
|_|
- --------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
Approximately 5.9%
- --------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
CO
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
(INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.
<PAGE>
SCHEDULE 13D
CUSIP NO. 09066T108 PAGE 3 OF 16 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
MSC Partners, L.P.
TP# - 13-3749469
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(A) |_|
(B) |_|
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
OO,WC,BK
- --------------------------------------------------------------------------------
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
- --------------------------------------------------------------------------------
NUMBER OF 7 SOLE VOTING POWER
SHARES
BENEFICIALLY 629,600**
OWNED BY
EACH ------------------------------------------------------------
REPORTING
PERSON 8 SHARED VOTING POWER
WITH
------------------------------------------------------------
9 SOLE DISPOSITIVE POWER
629,600**
-------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
- --------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
629,600**
- --------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
|_|
- --------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
Approximately 5.9%
- --------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
INCLUDE BOTH SIDES OF THE COVER PAGE,
RESPONSES TO ITEMS 1-7 (INCLUDING EXHIBITS) OF
THE SCHEDULE, AND THE SIGNATURE ATTESTATION.
<PAGE>
SCHEDULE 13D
CUSIP NO. 09066T108 PAGE 4 OF 16 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Rexford Offshore, L.L.C.
TP# - 13-3862326
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(A) |_|
(B) |_|
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
OO, WC
- --------------------------------------------------------------------------------
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
- --------------------------------------------------------------------------------
NUMBER OF 7 SOLE VOTING POWER
SHARES
BENEFICIALLY 153,900**
OWNED BY
EACH ------------------------------------------------------------
REPORTING
PERSON 8 SHARED VOTING POWER
WITH
------------------------------------------------------------
9 SOLE DISPOSITIVE POWER
153,900**
------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
- --------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
153,900**
- --------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
|_|
- --------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
Approximately 1.4%**
- --------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
OO
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
INCLUDE BOTH SIDES OF THE COVER PAGE,
RESPONSES TO ITEMS 1-7 (INCLUDING EXHIBITS) OF
THE SCHEDULE, AND THE SIGNATURE ATTESTATION.
<PAGE>
SCHEDULE 13D
CUSIP NO. 09066T108 PAGE 5 OF 16 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Douglas Schloss
SS# ###-##-####
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(A) |_|
(B) |_|
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
OO,WC,BK
- --------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e)
|_|
- --------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S.A.
- --------------------------------------------------------------------------------
NUMBER OF 7 SOLE VOTING POWER
SHARES
BENEFICIALLY 1,059,700**
OWNED BY
EACH ------------------------------------------------------------
REPORTING
PERSON 8 SHARED VOTING POWER
------------------------------------------------------------
9 SOLE DISPOSITIVE POWER
1,059,700**
------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
- --------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,059,700**
- --------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
|_|
- --------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
Approximately 9.8%
- --------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
INCLUDE BOTH SIDES OF THE COVER PAGE,
RESPONSES TO ITEMS 1-7 (INCLUDING EXHIBITS) OF
THE SCHEDULE, AND THE SIGNATURE ATTESTATION.
<PAGE>
SCHEDULE 13D
CUSIP NO. 09066T108 PAGE 6 OF 16 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Richard Perry Schloss
SS # ###-##-####
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(A) |_|
(B) |_|
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 SOURCE OF FUNDS*
OO,WC,BK
- --------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e)
|_|
- --------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S.A.
- --------------------------------------------------------------------------------
NUMBER OF 7 SOLE VOTING POWER
SHARES
BENEFICIALLY 1,059,700**
OWNED BY ------------------------------------------------------------
EACH
REPORTING 8 SHARED VOTING POWER
PERSON
WITH ------------------------------------------------------------
9 SOLE DISPOSITIVE POWER
1,059,700**
------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
- --------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,059,700**
- --------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
|_|
- --------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
Approximately 9.8%
- --------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
INCLUDE BOTH SIDES OF THE COVER PAGE,
RESPONSES TO ITEMS 1-7 (INCLUDING EXHIBITS) OF
THE SCHEDULE, AND THE SIGNATURE ATTESTATION.
<PAGE>
** Each of Douglas Schloss and Richard P. Schloss may be deemed to control
(i) Marcus Schloss & Co., Inc. ("Marcus Schloss"), (ii) Rexford Management,
Inc. ("Rexford"), the sole general partner of MSC Partners, L.P. ("MSCP"),
(iii) Rexford Offshore, L.L.C. ("Rexford Offshore"), the investment manager
of MSC Offshore Fund, Ltd. ("MOFL"), and (iv) Rexford Fund, Inc. ("Rexford
Fund"). As Rexford controls MSCP, each of Douglas Schloss and Richard P.
Schloss may also be deemed to control MSCP. In addition, because each of
Douglas Schloss and Richard P. Schloss may be deemed to control Marcus
Schloss, Rexford, MSCP, Rexford Offshore and Rexford Fund, Marcus Schloss,
Rexford, MSCP, Rexford Offshore and Rexford Fund may be deemed to be under
common control. Rexford Offshore, pursuant to an Investment Management
Agreement between MOFL and Rexford Offshore, is responsible for (and has
discretionary power over) the investment of MOFL's assets. Accordingly, (i)
each of Douglas Schloss and Richard P. Schloss may be considered to have
beneficial ownership of and voting and dispositive power over the 1,059,700
shares of BioWhittaker, Inc. common stock ("Shares") owned of record by
Marcus Schloss, MSCP, MOFL and Rexford Fund, (ii) Rexford may be considered
to have beneficial ownership of and voting and dispositive power over the
629,600 Shares owned of record by MSCP, and (iii) Rexford Offshore may be
considered to have beneficial ownership of and voting and dispositive power
over the 153,900 Shares owned of record by MOFL.
Page 7 of 16
<PAGE>
The Statement on Schedule 13D, dated January 20, 1994, as amended by
Amendment No. 1 thereto, dated February 9, 1995, Amendment No. 2 thereto, dated
December 11, 1995 and Amendment No. 3 thereto, Dated August 26, 1997 (as so
amended, the "Schedule 13D"), of Marcus Schloss & Co., Inc., MSC Partners, L.P.,
Rexford Management, Inc., Rexford Offshore, L.L.C., Rexford Fund, Inc., Douglas
Schloss, Richard P. Schloss and Mark K. Schmidt relating to shares of common
stock, $.01 par value, of BioWhittaker, Inc., a Delaware corporation (the
"Company"), is hereby amended to insert the following information in response to
the items indicated. Capitalized terms used but not otherwise defined herein
have the meanings set forth in the Schedule 13D.
Item 1. Security and Issuer.
No material change.
Item 2. Identity and Background.
No material change.
Item 3. Source and Amount of Funds or Other Consideration.
No material change as to Marcus Schloss, Rexford Fund or Mark K.
Schmidt.
The aggregate amount of funds used by MSCP to purchase the 629,600
Shares beneficially owned by MSCP on the date hereof (including the cost basis
of Shares acquired through the Contribution) was approximately $4,621,317,
including commissions. The funds used by MSCP to purchase Shares (other than
Shares acquired through the Contribution) have come from working capital and
from margin transactions for MSCP financed by Morgan Stanley & Co. Incorporated
and Goldman, Sachs & Co. in the ordinary course of the lenders' and MSCP's busi-
nesses.
Rexford Offshore does not own any Shares of record. However, pursuant
to an Investment Management Agreement (the "Investment Management Agreement")
between itself and MOFL, Rexford Offshore manages MOFL's investment portfolio
and has discretionary power to vote and to dispose of any securities owned of
record by MOFL (including the Shares). The aggregate amount of funds used by
MOFL to purchase the 153,900 Shares beneficially owned by MOFL was approximately
$1,547,079, including commissions. The funds used by MOFL to purchase Shares
have come from working capital and from margin transactions for MOFL financed by
Goldman, Sachs & Co. in the ordinary course of such lender's and MOFL's
businesses.
Item 4. Purpose of Transaction.
No material change.
Page 8 of 16
<PAGE>
Item 5. Interest in Securities of the Issuer.
(a) No material change as to Marcus Schloss, Rexford Fund or Mark K.
Schmidt.
As of the close of business on August 27, 1997, MSCP beneficially owned
629,600 Shares, representing approximately 5.9% of the 10,760,866 Shares
outstanding, as most recently reported by the Company on its Quarterly Report on
Form 10-Q for the fiscal quarter ended April 30, 1997. As of the close of
business on August 25, 1997, Rexford Offshore beneficially owned 153,900 Shares,
representing approximately 1.4% of the Shares outstanding. Each of Douglas
Schloss and Richard P. Schloss may be deemed to control Marcus Schloss, Rexford,
Rexford Offshore and Rexford Fund and, through Rexford, each of them may be
deemed to control MSCP. Marcus Schloss, Rexford, MSCP, Rexford Offshore and
Rexford Fund therefore may be deemed to be under common control. In addition,
each of Douglas Schloss and Richard P. Schloss may be deemed through Rexford
Offshore to have discretionary power over the investments of MOFL. Accordingly,
(i) each of Douglas Schloss and Richard P. Schloss may be considered to have
beneficial ownership of the entire 1,059,700 Shares owned of record by Marcus
Schloss, MSCP, MOFL and Rexford Fund (representing approximately 9.8% of the
outstanding Shares), (ii) Rexford may be considered to have beneficial ownership
of the 629,600 Shares owned of record by MSCP, and (iii) Rexford Offshore may be
considered to have beneficial ownership of the 153,900 Shares owned of record by
MOFL.
Alison Schloss, the spouse of Douglas Schloss, owns of record 900
Shares and is the trustee of two trusts which, in the aggregate, own of record
2,600 Shares. The beneficiaries of such trusts are the children of Alison
Schloss and Douglas Schloss. Douglas Schloss disclaims beneficial ownership of
all such Shares owned by Alison Schloss or such trusts.
(b) No material change as to Marcus Schloss, Rexford Fund or Mark K.
Schmidt.
MSCP has sole power to vote and sole power to dispose of all 629,600
Shares owned of record by it. Rexford, as the sole general partner of MSCP,
directs the investments and voting of MSCP. As stated above, each of Douglas
Schloss and Richard P. Schloss may be deemed to control Rexford and thereby
MSCP.
Pursuant to the Investment Management Agreement, Rexford Offshore has
discretionary power to vote and to dispose of any securities owned of record by
MOFL. Rexford Offshore therefore may be deemed to have sole power to vote and
sole power to dispose of the 153,900 Shares owned of record by MOFL. As stated
above, each of Douglas Schloss and Richard P. Schloss may be deemed to control
Rexford Offshore.
(c) Schedule I hereto sets forth all transactions in the
Shares during the past 60 days by MSCP and MOFL. There have been no transactions
in the
Page 9 of 16
<PAGE>
Shares during the past 60 days by any of Marcus Schloss, Rexford, Rexford
Offshore, Rexford Fund, Douglas Schloss, Richard P. Schloss or Mark K. Schmidt.
(d) None.
(e) Not applicable.
Item 6. Contracts, Arrangements, Understandings or
Relationships with Respect to Securities of the
Issuer.
No material change.
Item 7. Material to Be Filed as Exhibits.
Exhibit A: Joint Filing Agreement
DISCLAIMERS
Each of Douglas Schloss and Richard P. Schloss hereby declares that the
filing of this Schedule 13D shall not be construed as an admission that he is,
for the purposes of Section 13(d) or 13(g) of the Securities Exchange Act of
1934, the beneficial owner of any securities covered herein. Marcus Schloss
hereby declares that the filing of this Schedule 13D shall not be construed as
an admission that it is, for the purposes of Section 13(d) or 13(g) of the
Securities Exchange Act of 1934, the beneficial owner of any securities covered
herein other than 226,200 Shares owned of record by Marcus Schloss. Each of
Rexford and MSCP hereby declares that the filing of this Schedule 13D shall not
be construed as an admission that it is, for the purposes of Section 13(d) or
13(g) of the Securities Exchange Act of 1934, the beneficial owner of any
securities covered herein other than the 629,600 Shares owned of record by MSCP.
Rexford Offshore hereby declares that the filing of this Schedule 13D shall not
be construed as an admission that it is, for the purposes of Section 13(d) or
13(g) of the Securities Exchange Act of 1934, the beneficial owner of any
securities covered herein other than the 153,900 Shares owned of record by MOFL.
Rexford Fund hereby declares that the filing of this Schedule 13D shall not be
construed as an admission that it is, for purposes of Section 13(d) or 13(g) of
the Securities Exchange Act of 1934, the beneficial owner of any securities
covered herein other than the 50,000 Shares owned of record by Rexford Fund.
Mark K. Schmidt hereby declares that the filing of this Schedule 13D shall not
be construed as an admission that he is, for the purposes of Section 13(d) or
13(g) of the Securities Exchange Act of 1934, the beneficial owner of any
securities covered herein other than the 3,350 Shares he owns of record or over
which he holds a power of attorney.
Page 10 of 16
<PAGE>
SIGNATURE
After reasonable inquiry and to the best knowledge and belief of each,
the undersigned certify that the information set forth in this statement is
true, complete and correct.
Date: August 28, 1997
MARCUS SCHLOSS & CO., INC.
By: /s/ Douglas Schloss
-----------------------------------------------
Douglas Schloss
Chairman and Chief Executive Officer
MSC PARTNERS, L.P.
By: Rexford Management, Inc.
General Partner
By: /s/ Douglas Schloss
------------------------------------------
Douglas Schloss
President
REXFORD MANAGEMENT, INC.
By: /s/ Douglas Schloss
-----------------------------------------------
Douglas Schloss
President
REXFORD OFFSHORE, L.L.C.
By: /s/ Douglas Schloss
-----------------------------------------------
Douglas Schloss
Managing Member
REXFORD FUND, INC.
By: /s/ Douglas Schloss
-----------------------------------------------
Douglas Schloss
President
Page 11 of 16
<PAGE>
DOUGLAS SCHLOSS
/s/ Douglas Schloss
--------------------------------------------------
Douglas Schloss
RICHARD P. SCHLOSS
/s/ Richard P. Schloss
--------------------------------------------------
Richard P. Schloss
MARK K. SCHMIDT
/s/ Mark K. Schmidt
--------------------------------------------------
Mark K. Schmidt
Page 12 of 16
<PAGE>
SCHEDULE I
This Schedule sets forth information with respect to each transaction
in the Shares which was effected by MSCP or MOFL since June 29, 1997. All
transactions were effected in the open market on United States securities
exchanges through a broker.
<TABLE>
<CAPTION>
Number of
Trade Settlement Shares Price Per
Date Purchaser Date Purchased Share* Total
----- --------- ---------- --------- --------- -----
<S> <C> <C> <C> <C> <C>
8/25/97 MSCP 8/28/97 58,600 $11.4605 $ 671,587.25
8/25/97 MOFL 8/28/97 93,400 $11.4482 $1,069,257.75
8/26/97 MSCP 8/29/97 1,000 $11.4375 $ 11,437.50
8/26/97 MOFL 8/29/97 1,000 $11.4375 $ 11,437.50
8/27/97 MSCP 9/2/97 40,000 $11.5400 $ 461,600.00
8/27/97 MOFL 9/2/97 10,000 $11.5400 $ 115,400.00
- --------
<FN>
* Includes commissions
</FN>
</TABLE>
Page 13 of 16
<PAGE>
EXHIBIT INDEX
Page
----
Exhibit A Joint Filing Agreement 15
Page 14 of 16
Exhibit A
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(f) under the Securities Exchange Act of
1934, as amended, the undersigned hereby agree to the joint filing on behalf of
each of them of a statement on Schedule 13D (including amendments thereto) with
respect to the Common Stock, $.01 par value, of BioWhittaker, Inc., and that
this Agreement be included as an Exhibit to such joint filing. This Agreement
may be executed in any number of counterparts all of which taken together shall
constitute one and the same instrument.
IN WITNESS WHEREOF, the undersigned hereby execute this Agreement this
28th day of August, 1997.
/s/ Douglas Schloss
--------------------------------------------
Douglas Schloss
/s/ Richard P. Schloss
--------------------------------------------
Richard P. Schloss
/s/ Mark K. Schmidt
--------------------------------------------
Mark K. Schmidt
MARCUS SCHLOSS & CO., INC.
By: /s/ Douglas Schloss
-----------------------------------------
Douglas Schloss
Chairman and Chief Executive Officer
MSC PARTNERS, L.P.
By:Rexford Management, Inc.
General Partner
By: /s/ Douglas Schloss
-----------------------------------------
Douglas Schloss
President
Page 15 of 16
<PAGE>
REXFORD MANAGEMENT, INC.
By: /s/ Douglas Schloss
-----------------------------------------
Douglas Schloss
President
REXFORD OFFSHORE, L.L.C.
By: /s/ Douglas Schloss
-----------------------------------------
Douglas Schloss
Managing Member
REXFORD FUND, INC.
By: /s/ Douglas Schloss
-----------------------------------------
Douglas Schloss
President
Page 16 of 16
