SC 13G 1 stem-13g.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ___________)* STEMCELLS INC ....................................................... (Name of Issuer) COMMON SHARES ....................................................... (Title of Class of Securities) 85857R105 ....................................................... (CUSIP Number) 08/09/2002 ....................................................... (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 the disclosures provided in a prior cover page. The information required in 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). CUSIP No. 85857R105 ....................................... 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). Mayer Offman, LLC/IRS #125405120 ....................................................................... 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) ................................................................... (b) ................................................................... 3. SEC Use Only ...................................................... 4. Citizenship or Place of Organization USA ....................................................................... Number of Shares Beneficially Owned by Each Reporting Person With 5. Sole Voting Power .................................................................... 6. Shared Voting Power 1,526,033 .................................................................... 7. Sole Dispositive Power .................................................................... 8. Shared Dispositive Power 2,729,333 .................................................................... 9. Aggregate Amount Beneficially Owned by Each Reporting Person 2,729,333 .................................................................... 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) .................................................................... 11. Percent of Class Represented by Amount in Row (9) 11.1% .................................................................... 12. Type of Reporting Person (See Instructions) .................................................................... IN .................................................................... .................................................................... .................................................................... .................................................................... .................................................................... CUSIP No. 92672P108 ....................................... 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). Generic Trading of Philadelphia, LLC/IRS #133963802 ....................................................................... 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) ................................................................... (b) ................................................................... 3. SEC Use Only ...................................................... 4. Citizenship or Place of Organization Delaware ....................................................................... Number of Shares Beneficially Owned by Each Reporting Person With 5. Sole Voting Power 1,526,033 .................................................................... 6. Shared Voting Power .................................................................... 7. Sole Dispositive Power 1,526,033 .................................................................... 8. Shared Dispositive Power .................................................................... 9. Aggregate Amount Beneficially Owned by Each Reporting Person 1,526,033 .................................................................... 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) .................................................................... 11. Percent of Class Represented by Amount in Row (9) 6.8% .................................................................... 12. Type of Reporting Person (See Instructions) .................................................................... BD .................................................................... .................................................................... .................................................................... .................................................................... .................................................................... Item 1. (a) Name of Issuer Stemcells Inc (b) Address of Issuer's Principal Executive Offices 3155 Porter Drive Palo Alto, CA 94304 Item 2. (a) Name of Person Filing This statement, with respect to the shares of Common Stock, .001 par value per share of Stemcells Inc (hereinafter referred to as "Common Shares") is filed by: 1. Mayer Offman (hereinafter referred to as "Offman"), the beneficial owner of a total of 2,729,333 Common Shares; 1,526,033 of which Offman has shared voting and dispositive power as the Vice-President of Shear-Offman, Inc. the managing member of Generic Trading of Philadelphia, LLC (hereinafter referred to as "GTP") which is the holder of record of such amount of shares; and 1,203,300 of which Offman has dispositive power as the authorized trader for accounts held by Gabriel Capital, LP hereinafter referred to as "GC"), Ariel Fund Limited (hereinafter referred to as "AFL")and Simaru Associates, LLC (hereinafter referred to as "SA") in which such shares are held; 2. GTP, a Delaware limited liability company doing business as a proprietary trading firm with which Offman serves as Vice-President of the managing member, Shear-Offman, Inc., a Delaware corporation. GTP beneficially owns 1,436,416 Common Shares which it has sole voting and dispositive powers; (b) Address of Principal Business Office or, if none, Residence The address of the reporting persons are as follows: 1. Mayer Offman 1270 Ave. of the Americas, 12th Floor New York, NY 10020 2. Generic Trading of Philadelphia, LLC 1270 Avenue of the Americas, 12th Floor New York, NY 10020 (c) Citizenship 1. United States of America 2. Delaware (d) Title of Class of Securities Common (e) CUSIP Number 85857R105 Item 3. If this statement is filed pursuant to Sect. 240.13d-1(b) or 240.13d-2(b)or (c), check whether the person filing is a: (a) [X] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o). (b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c). (c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c). (d) [ ] Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8). (e) [ ] An investment adviser in accordance with Sect.240.13d-1(b)(1)(ii)(E); (f) [ ] An employee benefit plan or endowment fund in accordance with Sect. 240.13d-1(b)(1)(ii)(F); (g) [ ] A parent holding company or control person in accordance with Sect. 240.13d-1(b)(1)(ii)(G); (h) [ ] A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); (i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3); (j) [ ] Group, in accordance with Sect. 240.13d-1(b)(1)(ii) (J). Item 4. Ownership. Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. A. Mayer Offman (a) Amount beneficially owned: 2,729,333 (b) Percent of Class: 11.1% (c) (i) Sole power to vote or direct the vote: 0 (ii) Shared Power to vote or direct the vote: 1,526,033 (iii)Sole power to dispose or direct the disposition: 0 (iv) Shared power to dispose or direct the disposition: 2,729,333 B. Generic Trading of Philadelphia, LLC (a) Amount beneficially owned: 1,526,033 (b) Percent of Class: 6.8% (c) (i) Sole power to vote or direct the vote: 1,526,033 (ii) Shared Power to vote or direct the vote: 0 (iii)Sole power to dispose or direct the disposition: 1,526,033 (iv) Shared power to dispose or direct the disposition: 0 Instruction. For computations regarding securities which represent a right to acquire an underlying security see Sect. 240.13d3(d)(1). 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. 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. 08/12/2002 ...................................... Date /s/ Mayer Offman ...................................... Mayer Offman /s/ Mayer Offman/Vice President ...................................... Generic Trading of Philadelphia, LLC Name/Title