-----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, Q1MTkyQfg8pxsxw3e4c2s1KoxIcZBl0s7LnCVk+EUPDLnclGJvaqkkXtmD2by6aK UnHRBn7qlbPs8kVwDMdyZg== 0000950005-04-000189.txt : 20040217 0000950005-04-000189.hdr.sgml : 20040216 20040213184452 ACCESSION NUMBER: 0000950005-04-000189 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20040217 GROUP MEMBERS: AUSTIN VENTURES IV-A, L.P. GROUP MEMBERS: AUSTIN VENTURES IV-B, L.P. GROUP MEMBERS: AUSTIN VENTURES V AFFILIATES FUND, L.P. GROUP MEMBERS: AUSTIN VENTURES V, L.P. GROUP MEMBERS: AUSTIN VENTURES VI AFFILIATES FUND, L.P. GROUP MEMBERS: AUSTIN VENTURES VI, L.P. GROUP MEMBERS: AV PARTNERS IV, L.P. GROUP MEMBERS: AV PARTNERS V, L.P. GROUP MEMBERS: AV PARTNERS VI, L.P. GROUP MEMBERS: BLAINE F. WESNER GROUP MEMBERS: EDWARD E. OLKKOLA GROUP MEMBERS: JEFFERY C. GARVEY GROUP MEMBERS: JOHN D. THORNTON GROUP MEMBERS: JOSEPH C. ARAGONA GROUP MEMBERS: KENNETH P. DEANGELIS GROUP MEMBERS: WILLIAM P. WOOD SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: SILICON LABORATORIES INC CENTRAL INDEX KEY: 0001038074 STANDARD INDUSTRIAL CLASSIFICATION: SEMICONDUCTORS & RELATED DEVICES [3674] IRS NUMBER: 742793174 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-60853 FILM NUMBER: 04601499 BUSINESS ADDRESS: STREET 1: 4635 BOSTON LN CITY: AUSTIN STATE: TX ZIP: 78735 MAIL ADDRESS: STREET 1: 4635 BOSTON LANE CITY: AUSTIN STATE: TX ZIP: 78735 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: AUSTIN VENTURES IV A LP CENTRAL INDEX KEY: 0001106472 IRS NUMBER: 742717230 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 701 N BRAZOS SUITE 1400 CITY: AUSTIN STATE: TX ZIP: 78701 BUSINESS PHONE: 5124763952 MAIL ADDRESS: STREET 1: 701 N BRAZOS ST SUITE 1400 CITY: AUSTIN STATE: TX ZIP: 78701 SC 13G/A 1 p18177_sc13ga.txt AMENDMENT TO SCHEDULE 13G -------------------------- OMB APPROVAL -------------------------- OMB Number: 3235-0145 Expires: December 31, 2005 Estimated average burden hours per response......11 -------------------------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 ------------ SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b) (Amendment No. 3)* Silicon Laboratories Inc. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock - -------------------------------------------------------------------------------- (Title of Class of Securities) 826919102 - -------------------------------------------------------------------------------- (CUSIP Number) December 31, 2003 - -------------------------------------------------------------------------------- (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-1(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 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). (Continued on following pages) Page 1 of 26 Exhibit Index on Page 22 CUSIP No. 826919102 Page 2 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Austin Ventures IV-A, L.P. ("AV IV-A") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY See response to row 5. OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares. WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER See response to row 7. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 3 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Austin Ventures IV-B, L.P. ("AV IV-B") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY See response to row 5. OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares. WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER See response to row 7. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 4 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) AV Partners IV, L.P. - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY See response to row 5. OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares. WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER See response to row 7. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 5 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Austin Ventures V, L.P. ("AV V") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY See response to row 5. OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares. WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER See response to row 7. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 6 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Austin Ventures V Affiliates Fund, L.P. ("AV V A") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY See response to row 5. OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares. WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER See response to row 7. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 7 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) AV Partners V, L.P. - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY See response to row 5. OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares. WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER See response to row 7. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 8 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Austin Ventures VI, L.P. ("AV VI") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 330,281 shares, except that AV Partners VI, L.P. ("AVP VI"), the general partner of AV VI, may be deemed to have sole power to vote these shares, and Aragona, DeAngelis, Garvey, Olkkola, Thornton and Wesner, the general partners of AVP VI, may be deemed to have shared power to vote these shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY See response to row 5. OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 330,281 shares, except that AV Partners VI, L.P. ("AVP WITH VI"), the general partner of AV VI, may be deemed to have sole power to dispose of these shares, and Aragona, DeAngelis, Garvey, Olkkola, Thornton and Wesner, the general partners of AVP VI, may be deemed to have shared power to dispose of these shares. -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER See response to row 7. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 330,281 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.7% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 9 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Austin Ventures VI Affiliates Fund, L.P. ("AV VI A") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 9,291 shares, except that AVP VI, the general partner of AV VI A, may be deemed to have sole power to vote these shares, and Aragona, DeAngelis, Garvey, Olkkola, Thornton and Wesner, the general partners of AVP VI, may be deemed to have shared power to vote these shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY See response to row 5. OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 9,291 shares, except that AVP VI, the general partner of WITH AV VI A, may be deemed to have sole power to dispose of these shares, and Aragona, DeAngelis, Garvey, Olkkola, Thornton and Wesner, the general partners of AVP VI, may be deemed to have shared power to dispose of these shares. -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER See response to row 7. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9,291 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 10 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) AV Partners VI, L.P. - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 339,572 shares, of which 330,281 are directly owned by AV VI and 9,291 are directly owned by AV VI A. AVP VI, the general partner of AV VI and AV VI A, may be deemed to have sole power to vote these shares, and Aragona, DeAngelis, Garvey, Olkkola, Thornton and Wesner, the general partners of AVP VI, may be deemed to have shared power to vote these shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY See response to row 5. OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 339,572 shares, of which 330,281 are directly owned by WITH AV VI and 9,291 are directly owned by AV VI A. AVP VI, the general partner of AV VI and AV VI A, may be deemed to have sole power to dispose of these shares, and Aragona, DeAngelis, Garvey, Olkkola, Thornton and Wesner, the general partners of AVP VI, may be deemed to have shared power to dispose of these shares. -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER See response to row 7. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 339,572 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.7% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 11 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Joseph C. Aragona ("Aragona") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 42,742 shares, of which 2,645 are directly owned by Aragona and 40,097 are directly owned by Aragona, Ltd., a Texas limited partnership, and Aragona, the sole general partner of Aragona, Ltd., may be deemed to have sole power to vote these shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 343,972 shares, of which 330,281 shares are directly OWNED BY owned by AV VI, 9,291 shares are directly owned by AV VI EACH A, and 4,400 shares are directly owned by the Sandra & REPORTING Joseph Aragona Family Foundation ("Aragona Foundation"), PERSON a Texas non-profit corporation . Aragona is a general WITH partner of AVP VI, the general partner of AV VI and AV VI A, and is a trustee of the Aragona Foundation, and he may be deemed to have shared power to vote these shares. -------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 42,742 shares, of which 2,645 are directly owned by Aragona and 40,097 are directly owned by Aragona, Ltd., a Texas limited partnership, and Aragona, the sole general partner of Aragona, Ltd., may be deemed to have sole power to dispose of these shares. -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 343,972 shares, of which 330,281 shares are directly owned by AV VI, 9,291 shares are directly owned by AV VI A, and 4,400 shares are directly owned by the Aragona Foundation. Aragona is a general partner of AVP VI, the general partner of AV VI and AV VI A, and is a trustee of the Aragona Foundation, and he may be deemed to have shared power to dispose of these shares. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 386,714 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.8% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 12 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Kenneth P. DeAngelis "(DeAngelis") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 68,879 shares, of which 41,325 are directly owned by DeAngelis and 27,554 are directly owned by DeAngelis, Ltd., a Texas limited partnership, and DeAngelis, the sole general partner of DeAngelis, Ltd., may be deemed to have sole power to vote these shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 339,572 shares, of which 330,281 shares are directly OWNED BY owned by AV VI and 9,291 shares are directly owned by AV EACH VI A. DeAngelis is a general partner of AVP VI, the REPORTING general partner of AV VI and AV VI A, and may be deemed PERSON to have shared power to vote these shares. WITH -------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 68,879 shares, of which 41,325 are directly owned by DeAngelis and 27,554 are directly owned by DeAngelis, Ltd., a Texas limited partnership, and DeAngelis, the sole general partner of DeAngelis, Ltd., may be deemed to have sole power to dispose of these shares. -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 339,572 shares, of which 330,281 shares are directly owned by AV VI and 9,291 shares are directly owned by AV VI A. DeAngelis is a general partner of AVP VI, the general partner of AV VI and AV VI A, and may be deemed to have shared power to dispose of these shares. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 408,451 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.8% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 13 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Jeffery C. Garvey ("Garvey") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 339,572 shares, of which 330,281 shares are directly OWNED BY owned by AV VI and 9,291 shares are directly owned by AV EACH VI A. Garvey is a general partner of AVP VI, the general REPORTING partner of AV VI and AV VI A, and may be deemed to have PERSON shared power to vote these shares. WITH -------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 0 shares. -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 339,572 shares, of which 330,281 shares are directly owned by AV VI and 9,291 shares are directly owned by AV VI A. Garvey is a general partner of AVP VI, the general partner of AV VI and AV VI A, and may be deemed to have shared power to dispose of these shares. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 339,572 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.7% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 14 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Edward E. Olkkola ("Olkkola") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 339,572 shares, of which 330,281 shares are directly OWNED BY owned by AV VI and 9,291 shares are directly owned by AV EACH VI A. Olkkola is a general partner of AVP VI, the REPORTING general partner of AV VI and AV VI A, and may be deemed PERSON to have shared power to vote these shares. WITH -------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 0 shares. -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 339,572 shares, of which 330,281 shares are directly owned by AV VI and 9,291 shares are directly owned by AV VI A. Olkkola is a general partner of AVP VI, the general partner of AV VI and AV VI A, and may be deemed to have shared power to dispose of these shares. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 339,572 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.7% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 15 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) John D. Thornton ("Thornton") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 25,410 shares, of which 25,410 are directly owned by John Thornton Family I, Ltd. ("Family I") a Texas limited partnership, and Thornton, the sole general partner of Family I, may be deemed to have sole power to vote these shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 339,572 shares, of which 330,281 shares are directly OWNED BY owned by AV VI and 9,291 shares are directly owned by AV EACH VI A. Thornton is a general partner of AVP VI, the REPORTING general partner of AV VI and AV VI A, and may be deemed PERSON to have shared power to vote these shares. WITH -------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 25,410 shares, of which 25,410 are directly owned by John Thornton Family I, Ltd. ("Family I") a Texas limited partnership, and Thornton, the sole general partner of Family I, may be deemed to have sole power to dispose of these shares. -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 339,572 shares, of which 330,281 shares are directly owned by AV VI and 9,291 shares are directly owned by AV VI A. Thornton is a general partner of AVP VI, the general partner of AV VI and AV VI A, and may be deemed to have shared power to dispose of these shares. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 364,982 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.7% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 16 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Blaine F. Wesner - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 30,532 shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 339,572 shares, of which 330,281 shares are directly OWNED BY owned by AV VI and 9,291 shares are directly owned by AV EACH VI A. Wesner is a general partner of AVP VI, the general REPORTING partner of AV VI and AV VI A, and may be deemed to have PERSON shared power to vote these shares. WITH -------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 30,532 shares. -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 339,572 shares, of which 330,281 shares are directly owned by AV VI and 9,291 shares are directly owned by AV VI A. Wesner is a general partner of AVP VI, the general partner of AV VI and AV VI A, and may be deemed to have shared power to dispose of these shares. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 370,104 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.7% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 826919102 Page 17 of 26 Pages - -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) William P. Wood ("Wood") - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 607,092 shares, of which 67,316 are directly owned by Wood and 539,776 shares are directly owned by Silverton Partners, L.P. ("Silverton"), a Texas limited partnership, and Wood, the sole general partner of Silverton, may be deemed to have sole power to vote these shares. -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 24,000 shares, all of which 24,000 are directly owned by OWNED BY his spouse and children. EACH -------------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 607,092 shares, of which 67,316 are directly owned by Wood and 539,776 shares are directly owned by Silverton Partners, L.P. ("Silverton"), a Texas limited partnership, and Wood, the sole general partner of Silverton, may be deemed to have sole power to dispose of these shares. -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 24,000 shares, all of which are directly owned by his spouse and children. - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 631,092 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.3% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Page 18 of 26 Pages This statement amends the Statement on Schedule 13G filed by Austin Ventures IV-A, L.P., Austin Ventures IV-B, L.P., AV Partners IV, L.P., Austin Ventures V, L.P., Austin Ventures V Affiliates Fund, L.P., AV Partners V, L.P., Joseph C. Aragona, Kenneth P. DeAngelis, Jeffery C. Garvey, John D. Thornton, Blaine F. Wesner and William P. Wood, and includes the statements filed by Edward E. Olkkola, Austin Ventures VI, L.P., Austin Ventures VI Affiliates Fund, L.P. and AV Partners VI, L.P. The foregoing entities and individuals are collectively referred to as the "Reporting Persons." Only those items as to which there has been a change are included in this Amendment No. 1. 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. The following information with respect to the ownership of the Common Stock of the issuer by the persons filing this statement is provided as of December 31, 2003. (a) Amount beneficially owned: See Row 9 of cover page for each Reporting Person. (b) Percent of class: See Row 11 of cover page for each Reporting Person. (c) Number of shares as to which the person has: (i) Sole power to vote or to direct the vote See Row 5 of cover page for each Reporting Person. (ii) Shared power to vote or to direct the vote See Row 6 of cover page for each Reporting Person. (iii) Sole power to dispose or to direct the disposition of See Row 7 of cover page for each Reporting Person. (iv) Shared power to dispose or to direct the disposition of See Row 8 of cover page for each Reporting Person. 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: [X] Yes Page 19 of 26 Pages SIGNATURES 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: February 13, 2004 AUSTIN VENTURES IV-A, L.P. /s/ Kevin Kunz By AV Partners IV, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AUSTIN VENTURES IV-B, L.P. /s/ Kevin Kunz By AV Partners IV, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AV PARTNERS IV, L.P. /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AUSTIN VENTURES V, L.P. /s/ Kevin Kunz By AV Partners V, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AUSTIN VENTURES V AFFILIATES FUND, L.P. /s/ Kevin Kunz By AV Partners V, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AV PARTNERS V, L.P. /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact Page 20 of 26 Pages AUSTIN VENTURES VI, L.P. /s/ Kevin Kunz By AV Partners VI, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AUSTIN VENTURES VI AFFILIATES FUND, L.P./s/ Kevin Kunz By AV Partners VI, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AV PARTNERS VI, L.P. /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact JOSEPH C. ARAGONA /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact KENNETH P. DeANGELIS /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact JEFFERY C. GARVEY /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact EDWARD E. OLKKOLA /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact Page 21 of 26 Pages JOHN D. THORNTON /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact BLAINE F. WESNER /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact WILLIAM P. WOOD /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact Page 22 of 26 Pages EXHIBIT INDEX Found on Sequentially Exhibit Numbered Page - ------- ------------- Exhibit A: Agreement of Joint Filing 23 Exhibit B: Reference to Kevin Kunz as Attorney-In-Fact 26 Page 23 of 26 Pages EXHIBIT A Agreement of Joint Filing The Reporting Persons hereby agree that a single Schedule 13G (or any amendment thereto) relating to the Common Stock of Silicon Laboratories Inc. shall be filed on behalf of each of the Reporting Persons. Dated: February 13, 2004 AUSTIN VENTURES IV-A, L.P. /s/ Kevin Kunz By AV Partners IV, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AUSTIN VENTURES IV-B, L.P. /s/ Kevin Kunz By AV Partners IV, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AV PARTNERS IV, L.P. /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AUSTIN VENTURES V, L.P. /s/ Kevin Kunz By AV Partners V, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AUSTIN VENTURES V AFFILIATES FUND, L.P. /s/ Kevin Kunz By AV Partners V, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact Page 24 of 26 Pages AV PARTNERS V, L.P. /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AUSTIN VENTURES VI, L.P. /s/ Kevin Kunz By AV Partners VI, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AUSTIN VENTURES VI AFFILIATES FUND, L.P./s/ Kevin Kunz By AV Partners VI, L.P., ---------------------------------------- Its General Partner Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact AV PARTNERS VI, L.P. /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact JOSEPH C. ARAGONA /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact KENNETH P. DeANGELIS /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact JEFFERY C. GARVEY /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact Page 25 of 26 Pages EDWARD E. OLKKOLA /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact JOHN D. THORNTON /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact BLAINE F. WESNER /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact WILLIAM P. WOOD /s/ Kevin Kunz ---------------------------------------- Signature Kevin Kunz Chief Financial Officer/Attorney-In-Fact Page 26 of 26 Pages EXHIBIT B REFERENCE TO KEVIN KUNZ AS ATTORNEY-IN-FACT Kevin Kunz has signed the enclosed documents as Attorney-In-Fact. Note that copies of the applicable Power of Attorneys are already on file with the appropriate agencies. -----END PRIVACY-ENHANCED MESSAGE-----