CUSIP No. 0008946991 Page 1 of 8 Pages
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13D
(Rule 13d-101)
INFORMATION TO BE INCLUDED IN STATEMENTS
FILED PURSUANT TO RULE 13d-1(a)
AND AMENDMENTS THERETO FILED PURSUANT
TO RULE 13d-2(a)
(Amendment No. 1)
Trega Biosciences, Inc.
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(Name of Issuer)
Common Stock, $.001 par value
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(Title of Class of Securities)
0008946991
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(CUSIP Number)
Kathleen K. Schoemaker John C. MacMurray, Esq.
Domain Associates, L.L.C. Reboul, MacMurray, Hewitt,
One Palmer Square Maynard & Kristol
Princeton, New Jersey 08542 45 Rockefeller Plaza
Tel. (609) 683-5656 New York, New York 10111
Tel. (212) 841-5700
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(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)
March 3, 2000
------------------------------
(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 [ ].
(continued on following page)
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CUSIP No. 0008946991 Page 2 of 8 Pages
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1) Name of Reporting Person Domain Partners II,
S.S. or I.R.S. Identification L.P.
No. of Above Person
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2) Check the Appropriate Box (a) [x]
if a Member of a Group (b) [ ]
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3) SEC Use Only
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4) Source of Funds Not Applicable
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5) Check if Disclosure of
Legal Proceedings is Not Applicable
Required Pursuant to
Items 2(d) or 2(e)
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6) Citizenship or Place Delaware
of Organization
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Number of 7) Sole Voting 962,724 shares of
Shares Beneficially Power Common Stock
Owned by Each
Reporting Person:
---------------------------------------------
8) Shared Voting
Power -0-
---------------------------------------------
9) Sole Disposi- 962,724 shares of
tive Power Common Stock
---------------------------------------------
10) Shared Dis-
positive Power -0-
---------------------------------------------
11) Aggregate Amount Beneficially 962,724 shares of
Owned by Each Reporting Person Common Stock
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12) Check if the Aggregate
Amount in Row (11)
Excludes Certain Shares
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13) Percent of Class
Represented by 4.9%
Amount in Row (11)
--------------------------------------------------------------------------------
14) Type of Reporting
Person PN
<PAGE>
CUSIP No. 0008946991 Page 3 of 8 Pages
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1) Name of Reporting Person Domain Partners III,
S.S. or I.R.S. Identification L.P.
No. of Above Person
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2) Check the Appropriate Box (a) [x]
if a Member of a Group (b) [ ]
--------------------------------------------------------------------------------
3) SEC Use Only
--------------------------------------------------------------------------------
4) Source of Funds Not Applicable
--------------------------------------------------------------------------------
5) Check if Disclosure of
Legal Proceedings is Not Applicable
Required Pursuant to
Items 2(d) or 2(e)
--------------------------------------------------------------------------------
6) Citizenship or Place
of Organization Delaware
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Number of 7) Sole Voting 891,133 shares of
Shares Beneficially Power Common Stock
Owned by Each
Reporting Person:
---------------------------------------------
8) Shared Voting
Power -0-
---------------------------------------------
9) Sole Disposi- 891,133 shares of
tive Power Common Stock
---------------------------------------------
10) Shared Dis-
positive Power -0-
---------------------------------------------
11) Aggregate Amount Beneficially 891,133 shares of
Owned by Each Reporting Person Common Stock
--------------------------------------------------------------------------------
12) Check if the Aggregate
Amount in Row (11)
Excludes Certain Shares
--------------------------------------------------------------------------------
13) Percent of Class
Represented by 4.5%
Amount in Row (11)
--------------------------------------------------------------------------------
14) Type of Reporting
Person PN
<PAGE>
CUSIP No. 0008946991 Page 4 of 8 Pages
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1) Name of Reporting Person DP III Associates,
S.S. or I.R.S. Identification L.P.
No. of Above Person
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2) Check the Appropriate Box (a) [x]
if a Member of a Group (b) [ ]
--------------------------------------------------------------------------------
3) SEC Use Only
--------------------------------------------------------------------------------
4) Source of Funds Not Applicable
--------------------------------------------------------------------------------
5) Check if Disclosure of
Legal Proceedings is Not Applicable
Required Pursuant to
Items 2(d) or 2(e)
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6) Citizenship or Place
of Organization Delaware
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Number of 7) Sole Voting 3,936 shares of
Shares Beneficially Power Common Stock
Owned by Each
Reporting Person:
---------------------------------------------
8) Shared Voting
Power -0-
---------------------------------------------
9) Sole Disposi- 3,936 shares of
tive Power Common Stock
---------------------------------------------
10) Shared Dis-
positive Power -0-
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11) Aggregate Amount Beneficially 3,936 shares of
Owned by Each Reporting Person Common Stock
--------------------------------------------------------------------------------
12) Check if the Aggregate
Amount in Row (11)
Excludes Certain Shares
--------------------------------------------------------------------------------
13) Percent of Class
Represented by Less than 0.1%
Amount in Row (11)
--------------------------------------------------------------------------------
14) Type of Reporting
Person PN
<PAGE>
CUSIP No. 0008946991 Page 5 of 8 Pages
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1) Name of Reporting Person Domain Associates, L.L.C.
S.S. or I.R.S. Identification
No. of Above Person
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2) Check the Appropriate Box (a) [x]
if a Member of a Group (b) [ ]
--------------------------------------------------------------------------------
3) SEC Use Only
--------------------------------------------------------------------------------
4) Source of Funds Not Applicable
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5) Check if Disclosure of
Legal Proceedings is Not Applicable
Required Pursuant to
Items 2(d) or 2(e)
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6) Citizenship or Place
of Organization Delaware
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Number of 7) Sole Voting 6,966 shares of
Shares Beneficially Power Common Stock
Owned by Each
Reporting Person:
---------------------------------------------
8) Shared Voting
Power -0-
---------------------------------------------
9) Sole Disposi- 6,966 shares of
tive Power Common Stock
---------------------------------------------
10) Shared Dis-
positive Power -0-
---------------------------------------------
11) Aggregate Amount Beneficially 6,966 shares of
Owned by Each Reporting Person Common Stock
--------------------------------------------------------------------------------
12) Check if the Aggregate
Amount in Row (11)
Excludes Certain Shares
--------------------------------------------------------------------------------
13) Percent of Class
Represented by Less than 0.1%
Amount in Row (11)
--------------------------------------------------------------------------------
14) Type of Reporting
Person 00
<PAGE>
CUSIP No. 0008946991 Page 6 of 8 Pages
Amendment No. 1 to Schedule 13D
-------------------------------
Reference is hereby made to the statement on Schedule 13D originally
filed with the Securities and Exchange Commission on April 24, 1998 (the
"Schedule 13D"). Terms defined in the Schedule 13D are used herein as so
defined.
Item 5. Interest in Securities of the Issuer.
-------------------------------------
Item 5 is hereby amended and restated to read in its entirety as
follows:
The following information is based on a total of 19,604,377 shares of
Common Stock outstanding as of March 31, 2000, as reported in the Issuer's
Quarterly Report on Form 10-Q for the calendar quarter ended March 31, 2000.
(a)
DP II
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DP II owns an aggregate 962,724 shares of Common Stock, or
approximately 4.9% of the Common Stock outstanding.
OPSA II
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OPSA II, as the general partner of DP II, may be deemed to indirectly
beneficially own the 962,724 shares of Common Stock owned by DP II. OPSA II
also directly beneficially owns 100,124 shares of Common Stock, which it
received in the distribution described in paragraph (c) below. In the
aggregate, OPSA II owns approximately 5.4% of the Common Stock
outstanding.
DP III
------
DP III owns an aggregate 891,133 shares of Common Stock, or
approximately 4.5% of the Common Stock outstanding.
DPA
---
DPA owns an aggregate 3,936 shares of Common Stock, or less than .1%
of the Common Stock outstanding.
OPSA III
--------
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CUSIP No. 0008946991 Page 7 of 8 Pages
OPSA III, as the general partner of DP III and DPA, may be deemed to
indirectly beneficially own the aggregate 895,069 shares of Common Stock
owned by DP III and DPA. OPSA III also directly beneficially owns 19,209
shares of Common Stock, which it received in the distribution described in
paragraph (c) below. In the aggregate, OPSA III owns approximately 4.7% of
the Common Stock outstanding.
DA
--
DA owns an aggregate 6,966 shares of Common Stock, or less than 0.1%
of the Common Stock outstanding.
(b) The general partners of OPSA II and OPSA III and the managing
members of DA may be deemed to share the power to vote or direct the voting of
and to dispose or to direct the disposition of the shares of Common Stock owned
by DP II, DP III, DPA, DA, OPSA II and OPSA III. Each of the general partners of
OPSA II and OPSA III and the managing members of DA disclaims beneficial
ownership of all shares of Common Stock other than the shares of Common Stock he
or she owns by virtue of his or her indirect pro rata interest, as a partner of
OPSA II, and OPSA III and a managing member of DA, in the Common Stock owned by
DP II, DP III, DPA, DA, OPSA II and OPSA III.
(c) On March 3, 2000, the following distributions were made by the
reporting persons to their respective partners:
DP II distributed an aggregate 481,360 shares of Common Stock,
including 100,124 shares to its general partner, OPSA II. OPSA II will
distribute such 100,124 shares to its partners at a later date.
DP III distributed an aggregate 445,566 shares of Common Stock,
including 19,056 shares to its general partner, OPSA III. OPSA III
will distribute such 19,056 shares to its partners at a later date.
DPA distributed an aggregate 15,470 shares of Common Stock, including
153 shares to its general partner, OPSA III, OPSA III will distribute
such 153 shares to its partners at a later date.
(d) Except as described in this statement, no person has the power to
direct the receipt of dividends on, or the proceeds from sales of, the shares of
Common Stock owned by DP II, DP III, DPA or DA.
(e) Not applicable.
<PAGE>
CUSIP No. 0008946991 Page 8 of 8 Pages
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.
Dated: June 22, 2000
DOMAIN PARTNERS II, L.P.
By: One Palmer Square Associates
II L.P., General Partner
By /s/ Kathleen K. Schoemaker
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Attorney-in-Fact
DOMAIN PARTNERS III, L.P.
By: One Palmer Square Associates
III L.P., General Partner
By /s/ Kathleen K. Schoemaker
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General Partner
DP III ASSOCIATES, L.P.
By: One Palmer Square Associates
III L.P., General Partner
By /s/ Kathleen K. Schoemaker
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General Partner
DOMAIN ASSOCIATES, L.L.C.
By /s/ Kathleen K. Schoemaker
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Managing Member
