-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, UFMQIM7D26Xk1ahDeRP9j5jwU/6lGLnFXNyKXYdCAhAgls07hlcMpYWu1CNg71u1 E2spU+Q46Y6/3VCBompdVA== 0000940180-99-000144.txt : 19990215 0000940180-99-000144.hdr.sgml : 19990215 ACCESSION NUMBER: 0000940180-99-000144 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 3 FILED AS OF DATE: 19990212 GROUP MEMBERS: ANTHONY B. EVNIN GROUP MEMBERS: ANTHONY SUN GROUP MEMBERS: DAVIA R. HATHAWAY GROUP MEMBERS: KIMBERLEY A. RUMMELSBURG GROUP MEMBERS: PATRICK F. LATTERELL GROUP MEMBERS: RAY A. ROTHROCK GROUP MEMBERS: TED H. MCCOURTNEY GROUP MEMBERS: VENROCK ASSOCIATES GROUP MEMBERS: VENROCK ASSOCIATES II, L.P. SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: 3DFX INTERACTIVE INC CENTRAL INDEX KEY: 0001010026 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-PREPACKAGED SOFTWARE [7372] IRS NUMBER: 770390421 STATE OF INCORPORATION: CA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: SEC FILE NUMBER: 005-52571 FILM NUMBER: 99533359 BUSINESS ADDRESS: STREET 1: 4435 FORTRAN DR CITY: SAN JOSE STATE: CA ZIP: 95134 BUSINESS PHONE: 4089354400 MAIL ADDRESS: STREET 1: 4435 FORTRAN DR CITY: SAN JOSE STATE: CA ZIP: 95134 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: VENROCK ASSOCIATES CENTRAL INDEX KEY: 0000937889 STANDARD INDUSTRIAL CLASSIFICATION: [] IRS NUMBER: 136300995 STATE OF INCORPORATION: NY FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: ROOM 5508 STREET 2: 30 ROCKEFELLER PLAZA CITY: NEW YORK STATE: NY ZIP: 10112 BUSINESS PHONE: 2126495600 MAIL ADDRESS: STREET 1: ROOM 5508 STREET 2: 30 ROCKEFELLER PLAZA CITY: NEW YORK STATE: NY ZIP: 10112 SC 13G 1 SCHEDULE 13G SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (Amendment No. 1)* - 3Dfx Interactive, Inc. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock - -------------------------------------------------------------------------------- (Title of Class of Securities) 88553X103 ------------------- (CUSIP Number) January 1, 1998 - -------------------------------------------------------------------------------- (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) [_] Rule 13d-(c) [X] 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. 88553X103 13G PAGE 2 OF 17 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Venrock Associates I.R.S. #13-6300995 - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [X] (b) [_] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 4 New York, U.S.A. - ------------------------------------------------------------------------------ SOLE VOTING POWER 5 NUMBER OF 0 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 6 OWNED BY 607,194 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 7 REPORTING 0 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 8 607,194 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9 607,194 - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 10 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 11 4.83% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 12 PN - ------------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 2 of 17 pages - ----------------------- --------------------- CUSIP NO. 88553X103 13G PAGE 3 OF 17 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Venrock Associates II, L.P. I.R.S. #13-3844754 - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [X] (b) [_] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 4 New York, U.S.A. - ------------------------------------------------------------------------------ SOLE VOTING POWER 5 NUMBER OF 0 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 6 OWNED BY 301,044 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 7 REPORTING 0 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 8 301,044 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9 301,044 - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 10 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 11 2.39% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 12 PN - ------------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 3 of 17 pages - ----------------------- --------------------- CUSIP NO. 88553X103 13G PAGE 4 OF 17 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Anthony B. Evnin ###-##-#### - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [X] (b) [_] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 4 U.S.A. - ------------------------------------------------------------------------------ SOLE VOTING POWER 5 NUMBER OF 17,569 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 6 OWNED BY 908,238 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 7 REPORTING 17,569 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 8 908,238 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9 925,807 - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 10 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 11 7.36% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 12 IN - ------------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 4 of 17 pages - ----------------------- --------------------- CUSIP NO. 88553X103 13G PAGE 5 OF 17 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON David R. Hathaway ###-##-#### - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [X] (b) [_] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 4 U.S.A. - ------------------------------------------------------------------------------ SOLE VOTING POWER 5 NUMBER OF 21,919 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 6 OWNED BY 908,238 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 7 REPORTING 21,919 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 8 908,238 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9 930,157 - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 10 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 11 7.39% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 12 IN - ------------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 5 of 17 pages - ----------------------- --------------------- CUSIP NO. 88553X103 13G PAGE 6 OF 17 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Patrick F. Latterell ###-##-#### - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [X] (b) [_] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 4 U.S.A. - ------------------------------------------------------------------------------ SOLE VOTING POWER 5 NUMBER OF 16,964 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 6 OWNED BY 908,238 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 7 REPORTING 16,964 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 8 908,238 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9 925,202 - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 10 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 11 7.36% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 12 IN - ------------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 6 of 17 pages - ----------------------- --------------------- CUSIP NO. 88553X103 13G PAGE 7 OF 17 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Ted H. McCourtney ###-##-#### - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [X] (b) [_] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 4 U.S.A. - ------------------------------------------------------------------------------ SOLE VOTING POWER 5 NUMBER OF 23,886 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 6 OWNED BY 908,238 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 7 REPORTING 23,886 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 8 908,238 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9 932,124 - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 10 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 11 7.41% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 12 IN - ------------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 7 of 17 pages - ----------------------- --------------------- CUSIP NO. 88553X103 13G PAGE 8 OF 17 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Ray A. Rothrock ###-##-#### - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [X] (b) [_] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 4 U.S.A. - ------------------------------------------------------------------------------ SOLE VOTING POWER 5 NUMBER OF 16,058 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 6 OWNED BY 908,238 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 7 REPORTING 16,058 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 8 908,238 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9 924,296 - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 10 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 11 7.35% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 12 IN - ------------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 8 of 17 pages - ----------------------- --------------------- CUSIP NO. 88553X103 13G PAGE 9 OF 17 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Kimberley A. Rummelsburg ###-##-#### - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [X] (b) [_] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 4 U.S.A. - ------------------------------------------------------------------------------ SOLE VOTING POWER 5 NUMBER OF 0 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 6 OWNED BY 910,810 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 7 REPORTING 0 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 8 910,810 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9 910,810 - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 10 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 11 7.25% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 12 IN - ------------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 9 of 17 pages - ----------------------- --------------------- CUSIP NO. 88553X103 13G PAGE 10 OF 17 PAGES - ----------------------- --------------------- - ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Anthony Sun ###-##-#### - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [X] (b) [_] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 4 U.S.A. - ------------------------------------------------------------------------------ SOLE VOTING POWER 5 NUMBER OF 32,150 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 6 OWNED BY 908,238 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 7 REPORTING 32,150 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 8 908,238 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9 940,388 - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* 10 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 11 7.48% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON* 12 IN - ------------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 10 of 17 pages Introduction: This Amendment No. 1 amends a Statement on Schedule 13G (the "Schedule") filed with the Securities and Exchange Commission on February 14, 1997 on behalf of Venrock Associates, a limited partnership organized under the laws of the State of New York, Venrock Associates II, L.P., a limited partnership organized under the laws of the State of New York, Anthony B. Evnin, David R. Hathaway, Patrick F. Latterell, Ted H. McCourtney, Ray A. Rothrock, Kimberley A. Rummelsburg and Anthony Sun in respect of shares of Common Stock of 3Dfx Interactive, Inc. Item 1(a) Name of Issuer - -------------------------------- 3Dfx Interactive, Inc. Item 1(b) Address of Issuer's Principal Executive Offices - ----------------------------------------------------------------- 4435 Fortran Drive San Jose, CA 95134 Item 2(a) Name of Person Filing - --------------------------------------- Venrock Associates ("Venrock") Venrock Associates II, L.P. ("Venrock II") Anthony B. Evnin David R. Hathaway Patrick F. Latterell Ted H. McCourtney Ray A. Rothrock Kimberley A. Rummelsburg Anthony Sun Item 2(b) Address of Principal Business Office or, if none, Residence - ----------------------------------------------------------------------------- New York Office: Menlo Park Office: 30 Rockefeller Plaza 2494 Sand Hill Road Room 5508 Suite 200 New York, NY 10112 Menlo Park, CA 94025 Item 2(c) Citizenship - ----------------------------- Venrock and Venrock II are limited partnerships organized in the State of New York. Anthony B. Evnin, David R. Hathaway, Patrick F. Latterell, Ted H. McCourtney, Ray A. Rothrock, Kimberley A. Rummelsburg and Anthony Sun are General Partners of Venrock and Venrock II and all are citizens of the United States of America. Item 2(d) Title of Class of Securities - ---------------------------------------------- Common Stock Item 2(e) CUSIP Number - ------------------------------ 88553X103 Item 3 Not applicable. - ------ Page 11 of 17 pages Item 4 Ownership - ------------------------- (a) and (b) Venrock owns 607,194 shares or 4.83% of the outstanding shares of common stock. Venrock II owns 301,044 shares or 2.39% of the outstanding shares of common stock. Anthony B. Evnin beneficially owns 925,807 shares or 7.36% of the outstanding shares of common stock. David R. Hathaway beneficially owns 930,157 shares or 7.39% of the outstanding shares of common stock. Patrick F. Latterell beneficially owns 925,202 shares or 7.36% of the outstanding shares of common stock. Ted H. McCourtney beneficially owns 932,124 shares or 7.41% of the outstanding shares of common stock. Ray A. Rothrock beneficially owns 924,296 shares or 7.35% of the outstanding shares of common stock. Kimberley A. Rummelsburg beneficially owns 910,810 shares or 7.25% of the outstanding shares of common stock. Anthony Sun beneficially owns 940,388 shares or 7.48% of the outstanding shares of common stock. (c) Anthony B. Evnin has sole voting and dispositive power over 17,569 shares of common stock and shared voting and dispositive power over 908,238 shares of common stock. David R. Hathaway has sole voting and dispositive power over 21,919 shares of common stock and shared voting and dispositive power over 908,238 shares of common stock. Patrick F. Latterell has sole voting and dispositive power over 16,964 shares of common stock and shared voting and dispositive power over 908,238 shares of common stock. Ted H. McCourtney has sole voting and dispositive power over 23,886 shares of common stock and shared voting and dispositive power over 908,238 shares of common stock. Ray A. Rothrock has sole voting and dispositive power over 16,058 shares of common stock and shared voting and dispositive power over 908,238 shares of common stock. Kimberley A. Rummelsburg has sole voting and dispositive power over no shares of common stock and shared voting and dispositive power over 910,810 shares of common stock. Anthony Sun has sole voting and dispositive power over 32,150 shares of common stock and shared voting and dispositive powers over 908,238 shares of common stock. Item 5 Ownership of Five Percent or Less of a Class - ------------------------------------------------------------ If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [ ]. Item 6 Ownership of More than Five Percent of Behalf of Another Person - --------------------------------------------------------------------- No person, other than the General Partners of Venrock and Venrock II, has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of common stock owned by Venrock and Venrock II. 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 - ------------------------------------------------------------------------- This schedule is being filed pursuant to Rule 13d-1(d). The identities of the seven General Partners of Venrock and Venrock II are stated in Item 2. Item 9 Notice of Dissolution of Group - ---------------------------------------------- Not applicable. Page 12 of 17 pages Item 10 Certification - ----------------------------- Not applicable. Page 13 of 17 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. February 9, 1999 VENROCK ASSOCIATES By: /s/ Ted H. McCourtney --------------------- Ted H. McCourtney General Partner February 9, 1999 VENROCK ASSOCIATES II, L.P. By: /s/ Ted H. McCourtney --------------------- Ted H. McCourtney General Partner February 9, 1999 GENERAL PARTNERS * ------------------------------ Anthony B. Evnin * ------------------------------ David R. Hathaway * ------------------------------ Patrick F. Latterell * ------------------------------ Ted H. McCourtney * ------------------------------ Ray A. Rothrock * ------------------------------ Kimberley A. Rummelsburg * ------------------------------ Anthony Sun * By: /s/ Ted H. McCourtney --------------------- Ted H. McCourtney Attorney-in-Fact Page 14 of 17 pages Exhibit Index Page No. 24.1 Power of Attorney dated as of February 13, 1998 16 granted by the General Parnters in favor of Mr. Ted H. McCourtney 99.1 Agreement pursuant to 13d-1(k)(1) among Venrock 17 Associates, Venrock Associates II, L.P. and the General Partners thereof Page 15 of 17 pages EX-24.1 2 POWER OF ATTORNEY Exhibit 24.1 POWER OF ATTORNEY KNOWN ALL MEN BY THESE PRESENTS that each person whose signature appears below constitutes and appoints Ted H. McCourtney his or her true and lawful attorney- in-fact and agent, acting alone, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign the Schedule 13G, and all amendments thereto, with all exhibits thereto, and all documents in connection therewith, with respect to the beneficial ownership by the undersigned of the equity securities of 3Dfx Interactive, Inc., and to file the same, with the Securities and Exchange Commission and any other person, granting unto the attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, and hereby ratifies and confirms all that said attorney-in-fact and agent or his substitute or substitutes, may lawfully do or cause to be done. February 13, 1998 /s/ Mark W. Bailey -------------------------------- Mark W. Bailey General Partner /s/ Anthony B. Evnin -------------------------------- Anthony B. Evnin General Partner /s/ David R. Hathaway -------------------------------- David R. Hathaway General Partner /s/ Ted H. McCourtney -------------------------------- Ted H. McCourtney General Partner /s/ Ray A. Rothrock -------------------------------- Ray A. Rothrock General Partner /s/ Kimberley A. Rummelsburg --------------------------------- Kimberley A. Rummelsburg General Partner /s/ Patrick F. Latterell --------------------------------- Patrick F. Latterell General Partner /s/ Anthony Sun --------------------------------- Anthony Sun General Partner Page 16 of 17 pages EX-99.1 3 AGREEMENT Exhibit 99.1 ------------ AGREEMENT Pursuant to Rule 13d-1(k)(1) promulgated pursuant to the Securities Exchange Act of 1934, as amended, the undersigned agree that the attached Schedule 13G is being filed on behalf of each of the undersigned. February 9, 1999 VENROCK ASSOCIATES By: /s/ Ted H. McCourtney --------------------- Ted H. McCourtney General Partner February 9, 1999 VENROCK ASSOCIATES II, L.P. By: /s/ Ted H. McCourtney --------------------- Ted H. McCourtney General Partner February 9, 1999 GENERAL PARTNERS * ------------------------------ Anthony B. Evnin * ------------------------------ David R. Hathaway * ------------------------------ Patrick F. Latterell * ------------------------------ Ted H. McCourtney * ------------------------------ Ray A. Rothrock * ------------------------------ Kimberley A. Rummelsburg * ------------------------------ Anthony Sun * By: /s/ Ted H. McCourtney --------------------- Ted H. McCourtney Attorney-in-Fact Page 17 of 17 pages -----END PRIVACY-ENHANCED MESSAGE-----