UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )* XOMA LTD. (Name of Issuer) Common Shares, $.0005 par value (Title of Class of Securities) G9825R107 (CUSIP Number) October 28, 1999 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: { } Rule 13d-1(b) {X} Rule 13d-1(c) { } Rule 13d-1(d) *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). </PAGE> SCHEDULE 13G CUSIP No. G9825R107 Page 2 of 10 Pages - ------------------------------------------------------------------------- - 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) Advantage Fund II Ltd. - ------------------------------------------------------------------------- - 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A){ } (B){ } - ------------------------------------------------------------------------- - 3 SEC USE ONLY - ------------------------------------------------------------------------- - 4 CITIZENSHIP OR PLACE OF ORGANIZATION British Virgin Islands - ------------------------------------------------------------------------- - NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY -0- OWNED BY ---------------------------------------------------- - EACH 6 SHARED VOTING POWER REPORTING PERSON 3,400,174 WITH: ---------------------------------------------------- - 7 SOLE DISPOSITIVE POWER -0- ---------------------------------------------------- - 8 SHARED DISPOSITIVE POWER 3,400,174 - ------------------------------------------------------------------------- - 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,400,174 - ------------------------------------------------------------------------- - 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) { } - ------------------------------------------------------------------------- - 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.9% - ------------------------------------------------------------------------- - 12 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO - ------------------------------------------------------------------------- - </PAGE> SCHEDULE 13G CUSIP No. G9825R107 Page 3 of 10 Pages - ------------------------------------------------------------------------- - 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) Genesee International, Inc. - ------------------------------------------------------------------------- - 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A){ } (B){ } - ------------------------------------------------------------------------- - 3 SEC USE ONLY - ------------------------------------------------------------------------- - 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - ------------------------------------------------------------------------- - NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY -0- OWNED BY ---------------------------------------------------- - EACH 6 SHARED VOTING POWER REPORTING PERSON 3,400,174 WITH: ---------------------------------------------------- - 7 SOLE DISPOSITIVE POWER -0- ---------------------------------------------------- - 8 SHARED DISPOSITIVE POWER 3,400,174 - ------------------------------------------------------------------------- - 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,400,174 - ------------------------------------------------------------------------- - 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) { } - ------------------------------------------------------------------------- - 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.9% - ------------------------------------------------------------------------- - 12 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO - ------------------------------------------------------------------------- - </PAGE> SCHEDULE 13G CUSIP No. G9825R107 Page 4 of 10 Pages - ------------------------------------------------------------------------- - 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) Donald R. Morken - ------------------------------------------------------------------------- - 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A){ } (B){ } - ------------------------------------------------------------------------- - 3 SEC USE ONLY - ------------------------------------------------------------------------- - 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------------------------------------------------------------------------- - NUMBER OF 5 SOLE VOTING POWER SHARES BENEFICIALLY -0- OWNED BY ---------------------------------------------------- - EACH 6 SHARED VOTING POWER REPORTING PERSON 3,400,174 WITH: ---------------------------------------------------- - 7 SOLE DISPOSITIVE POWER -0- ---------------------------------------------------- - 8 SHARED DISPOSITIVE POWER 3,400,174 - ------------------------------------------------------------------------- - 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,400,174 - ------------------------------------------------------------------------- - 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) { } - ------------------------------------------------------------------------- - 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.9% - ------------------------------------------------------------------------- - 12 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IN - ------------------------------------------------------------------------- - </PAGE> SCHEDULE 13G CUSIP No. G9825R107 Page 5 of 10 Pages Item 1. Name and Address of Issuer: XOMA Ltd. 2910 Seventh Street Berkeley, California 94710 Item 2. (a) Names of Persons Filing: Advantage Fund II Ltd. ("Advantage") Genesee International, Inc. ("Genesee International") Donald R. Morken ("Mr. Morken") (b) Address of Principal Business Office: Advantage: c/o CITCO Kaya Flamboyan 9 Curacao, Netherlands Antilles Genesee International: CITCO Building Wickhams Cay P.O. Box 662 Road Town Tortola, British Virgin Islands Mr. Morken: 10500 N.E. 8th Street Suite 1920 Bellevue, Washington 98004-4332 (c) Place of Organization or Citizenship: Advantage: British Virgin Islands Genesee International: Delaware Mr. Morken: citizen of the United States (d) Title of Class of Securities: Common Shares, $.0005 par value (e) CUSIP Number: G9825R107 Item 3. This statement is filed pursuant to Rule 13d-1(c) by Advantage, Genesee International and Mr. Morken. </PAGE> SCHEDULE 13G CUSIP No. G9825R107 Page 6 of 10 Pages Item 4. Ownership: (a) Amount Beneficially Owned by Advantage, Genesee International and Mr. Morken: Advantage: 3,400,174 Genesee International: 3,400,174 Mr. Morken: 3,400,174 (b) Percent of Class: Advantage: 5.9% Genesee International: 5.9% Mr. Morken: 5.9% The Issuer reported that 55,552,763 Common Shares were outstanding as of September 15, 1999 in its Registration Statement on Form S-3 filed with the Securities and Exchange Commission on September 16, 1999. Such amount was used to determine the percentages of outstanding Common Shares reported in this statement. (c) Number of Shares as to which the Person has: (i) sole power to vote or to direct the vote Advantage: -0- Genesee International: -0- Mr. Morken: -0- (ii) shared power to vote or to direct the vote Advantage: 3,400,174 Genesee International: 3,400,174 Mr. Morken: 3,400,174 (iii) sole power to dispose or to direct the disposition of Advantage: -0- Genesee International: -0- Mr. Morken: -0- </PAGE> SCHEDULE 13G CUSIP No. G9825R107 Page 7 of 10 Pages (iv) shared power to dispose or to direct the disposition of Advantage: 3,400,174 Genesee International: 3,400,174 Mr. Morken: 3,400,174 The Common Shares listed as beneficially owned by the reporting persons consist of shares owned directly by Advantage, shares issuable upon the exercise of certain Common Share Purchase Warrants of the Issuer held by Advantage, and shares which Advantage has the right to acquire pursuant to the terms of a Subscription Agreement, dated as of January 28, 1999 (the "Subscription Agreement"), by and between the Issuer and Advantage. The number of Common Shares listed as beneficially owned herein is reported as of the close of business on November 8, 1999. Based on circumstances occurring after November 8, 1999, Advantage may be entitled to receive additional Common Shares pursuant to the terms of the Subscription Agreement. Item 5. Ownership of Five Percent or Less of a Class: Not applicable Item 6. Ownership of More Than Five Percent on Behalf of Another Person: Not applicable Item 7. Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company: Not applicable Item 8. Identification and Classification of Members of the Group: Not applicable Item 9. Notice of Dissolution of Group: Not applicable Item 10. Certification: By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. </PAGE> SCHEDULE 13G CUSIP No. G9825R107 Page 8 of 10 Pages Exhibits: 1. Joint Filing Agreement, dated as of November 8, 1999, by and among Advantage, Genesee International and Mr. Morken. </PAGE> SCHEDULE 13G CUSIP No. G9825R107 Page 9 of 10 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. ADVANTAGE FUND II LTD. By: INTER CARIBBEAN SERVICES LTD., Director By: /s/ W.R. Weber ----------------------- Name: W.R. Weber Title: Attorney-in-fact By: /s/ Declan Quilligan ----------------------- Name: Declan Quilligan Title: Assistant Secretary Dated: November 8, 1999 GENESEE INTERNATIONAL, INC. By: /s/ Donald R. Morken ----------------------- Name: Donald R. Morken Title: President Dated: November 8, 1999 /s/ Donald R. Morken ----------------------- Donald R. Morken Dated: November 8, 1999 </PAGE> SCHEDULE 13G CUSIP No. G9825R107 Page 10 of 10 Pages Exhibit 1 --------- JOINT FILING AGREEMENT ---------------------- This will confirm the agreement by and among the undersigned that the Schedule 13G filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership of the undersigned of the Common Shares, $.0005 par value, of XOMA Ltd., a Bermuda company, is being filed, and all amendments thereto will be filed, on behalf of each of the persons and entities named below in accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Dated: as of November 8, 1999 ADVANTAGE FUND II LTD. By: INTER CARIBBEAN SERVICES LTD., Director By: /s/ W.R. Weber ----------------------- Name: W.R. Weber Title: Attorney-in-fact By: /s/ Declan Quilligan ----------------------- Name: Declan Quilligan Title: Assistant Secretary GENESEE INTERNATIONAL, INC. By: /s/ Donald R. Morken ----------------------- Name: Donald R. Morken Title: President /s/ Donald R. Morken ----------------------- Donald R. Morken |