SC 13D/A 1 s13d_0106-2004onyx.txt SCHEDULE 13D AND AMENDMENTS 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 )[1] Onyx Pharmaceuticals, Inc. -------------------------------------------- (Name of Issuer) Common Stock, $.001 par value -------------------------------------------- (Title of Class of Securities) 683399 10 9 -------------------------------------------- (CUSIP Number) Kathleen K. Schoemaker John C. MacMurray, Esq. Domain Associates, L.L.C. Ropes & Gray LLP One Palmer Square 45 Rockefeller Plaza Princeton, New Jersey 08452 New York, NY 10111 Tel. (609) 683-5656 Tel. (212) 841-5700 ---------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) November 10, 2003 -------------------------------------------- (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(e), 13d-1(f) or 13d-1(g), check the following box [ ]. ------------------------------ [1]The remainder of this cover page shall be filled out for a reporting person's intial 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 purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act. CUSIP No. 683399 10 9 Page 2 of 8 Pages 1) Name of Reporting Person Domain Partners I.R.S. Identification IV, L.P. No. of Above Person (If an Entity) ------------------------------------------------------------------------------- 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 ------------------------------------------------------------------------------- Number of 7) Sole Voting 453,166 shares of Shares Beneficially Power Common Stock Owned by Each Reporting Person With 8) Shared Voting Power -0- ----------------------------------- 9) Sole Disposi- 453,166 shares of tive Power Common Stock 10) Shared Dis- positive Power -0- ----------------------------------- 11) Aggregate Amount Beneficially 453,166 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 1.5% Amount in Row (11) ------------------------------------ 14) Type of Reporting Person PN CUSIP No. 683399 10 9 Page 3 of 8 Pages 1) Name of Reporting Person DP IV I.R.S. Identification Associates, L.P. No. of Above Person (If an Entity) ------------------------------------------------------------------------------- 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 ------------------------------------------------------------------------------- Number of 7) Sole Voting 10,853 shares of Shares Beneficially Power Common Stock Owned by Each Reporting Person With 8) Shared Voting Power -0- ----------------------------------- 9) Sole Disposi- 10,853 shares of tive Power Common Stock 10) Shared Dis- positive Power -0- ----------------------------------- 11) Aggregate Amount Beneficially 10,853 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 CUSIP No. 683399 10 9 Page 4 of 8 Pages 1) Name of Reporting Person Domain Partners I.R.S. Identification V, L.P. No. of Above Person (If an Entity) ------------------------------------------------------------------------------- 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 ------------------------------------------------------------------------------- Number of 7) Sole Voting 684,583 shares of Shares Beneficially Power Common Stock Owned by Each (including shares Reporting Person issuable upon With exercise of warrants) --------------------------------------- 8) Shared Voting Power -0- --------------------------------------- 9) Sole Disposi- 684,583 shares of tive Power Common Stock including shares issuable upon exercise of warrants) --------------------------------------- 10) Shared Dis- positive Power -0- --------------------------------------- 11) Aggregate Amount Beneficially 684,583 shares of Owned by Each Reporting Person Common Stock (including shares issuable upon exercise of warrants) ------------------------------------------------------------------------------- 12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares ------------------------------------------------------------------------------- 13) Percent of Class Represented by 2.3% Amount in Row (11) ------------------------------------------------------------------------------- 14) Type of Reporting Person PN CUSIP No. 683399 10 9 Page 5 of 8 Pages 1) Name of Reporting Person DP V I.R.S. Identification Associates, L.P. No. of Above Person (If an Entity) ------------------------------------------------------------------------------- 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 ------------------------------------------------------------------------------- Number of 7) Sole Voting 16,190 shares of Shares Beneficially Power Common Stock Owned by Each (including shares Reporting Person issuable upon With exercise of warrants) ------------------------------------------- 8) Shared Voting Power -0- ------------------------------------------- 9) Sole Disposi- 16,190 shares of tive Power Common Stock (including shares issuable upon exercise of warrants) ------------------------------------------- 10) Shared Dis- positive Power -0- ------------------------------------------- 11) Aggregate Amount Beneficially 16,190 shares of Owned by Each Reporting Person Common Stock (including shares issuable upon exercise of warrants) ------------------------------------------------------------------------------- 12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares ------------------------------------------------------------------------------- 13) Percent of Class Represented by 0.1% Amount in Row (11) ------------------------------------------------------------------------------- 14) Type of Reporting Person PN CUSIP No. 683399 10 9 Page 6 of 8 Pages Amendment No 1 to Schedule 13D (Final Amendment) ----------------------------------------------- Reference is hereby made to the statement on Schedule 13D filed with the Securities and Exchange Commission on May 30, 2002 (the "Schedule 13D"). Terms defined in the Schedule 13D are used herein as so defined. The Schedule 13D is hereby amended as follows: 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 29,390,343 shares of Common Stock outstanding as of November 6, 2003, and gives effect to the exercise of the Warrants held by DP V and DP V A. (a) DP IV ----- DP IV owns 453,166 shares of Common Stock, or approximately 1.5% of the Common Stock outstanding. OPSA IV, as the general partner of DP IV, may be deemed to beneficially own the shares of Common Stock owned by DP IV. DP IV A ------- DP IV A owns 10,853 shares of Common Stock, or less than 0.1% of the Common Stock outstanding. OPSA IV, as the general partner of DP IV A, may be deemed to beneficially own the shares of Common Stock owned by DP IV A. DP V ---- DP V owns 684,583 shares of Common Stock, or approximately 2.3% of the Common Stock outstanding. OPSA V, as the general partner of DP V, may be deemed to beneficially own the shares of Common Stock owned by DP V. DP V A ------ DP V A owns 16,190 shares of Common Stock, or approximately 0.1% of the Common Stock outstanding. OPSA V, as the general partner of DP V A, may be deemed to beneficially own the shares of Common Stock owned by DP V A. (b) The managing members of OPSA IV and OPSA V may be deemed to share the power to vote or direct the voting of and to dispose or to direct the disposition of the Common Stock owned by DP IV, DP IV A, DP V and DP V A. Each of the managing members of OPSA IV and OPSA V disclaims beneficial ownership of all shares of Common Stock other than the shares of Common Stock he or she may own directly, if any, or by virtue of his or her indirect pro rata interest, as a managing member of OPSA IV and/or OPSA V, in the Common Stock owned by DP IV, DP IV A, DP V and/or DP V A. (c) Between November 3, 2003 and November 10, 2003, DP IV sold an aggregate 197,899 shares of Common Stock, DP IV A sold an aggregate 4,749 shares of Common Stock, DP V sold an aggregate 219,975 shares of Common Stock and DP V A sold an aggregate 5,177 shares of Common Stock, all in open market transactions at an average price of $24.37 per share. CUSIP No. 683399 10 9 Page 7 of 8 Pages (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 Common Stock owned by DP IV, DP IV A, DP V or DP V A. (e) The Reporting Persons became the beneficial owners of less than five percent of the Common Stock on November 10, 2003. CUSIP No. 683399 10 9 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: January 5, 2004 DOMAIN PARTNERS IV, L.P. By: One Palmer Square Associates IV, L.L.C., General Partner By /s/ Kathleen K. Schoemaker -------------------------- Managing Member DP IV ASSOCIATES, L.P. By: One Palmer Square Associates IV, L.L.C., General Partner By /s/ Kathleen K. Schoemaker -------------------------- Managing Member DOMAIN PARTNERS V, L.P. By: One Palmer Square Associates V, L.L.C., General Partner By /s/ Kathleen K. Schoemaker -------------------------- Managing Member DP V ASSOCIATES, L.P. By: One Palmer Square Associates V, L.L.C., General Partner By /s/ Kathleen K. Schoemaker -------------------------- Managing Member