-----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, QR3AJUXNZHuxLbTCi8OFDkH5y0Gd7SS3k23jDduuCPVsQimU8YU4B6S3rixEcbfM 2QkQL5G2RfsBY82xsufjxQ== 0000899140-08-002248.txt : 20081217 0000899140-08-002248.hdr.sgml : 20081217 20081217170046 ACCESSION NUMBER: 0000899140-08-002248 CONFORMED SUBMISSION TYPE: SC 13D/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20081217 DATE AS OF CHANGE: 20081217 GROUP MEMBERS: CHARLES R. KAYE GROUP MEMBERS: JOSEPH P. LANDY GROUP MEMBERS: WARBURG PINCUS & CO. GROUP MEMBERS: WARBURG PINCUS LLC GROUP MEMBERS: WARBURG PINCUS PARTNERS, LLC GROUP MEMBERS: WARBURG PINCUS X LLC GROUP MEMBERS: WARBURG PINCUS X PARTNERS, L.P. GROUP MEMBERS: WARBURG PINCUS X, L.P. SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: WuXi PharmaTech (Cayman) Inc. CENTRAL INDEX KEY: 0001403132 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 000000000 STATE OF INCORPORATION: E9 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13D/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-83350 FILM NUMBER: 081255657 BUSINESS ADDRESS: STREET 1: 288 FUTE ZHONG ROAD STREET 2: WAIGAOQIAO FREE TRADE ZONE CITY: SHANGHAI STATE: F4 ZIP: 200131 BUSINESS PHONE: 86-21-5046-1111 MAIL ADDRESS: STREET 1: 288 FUTE ZHONG ROAD STREET 2: WAIGAOQIAO FREE TRADE ZONE CITY: SHANGHAI STATE: F4 ZIP: 200131 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: Warburg Pincus Private Equity X, L.P. CENTRAL INDEX KEY: 0001414565 IRS NUMBER: 200849130 FILING VALUES: FORM TYPE: SC 13D/A BUSINESS ADDRESS: STREET 1: C/O WARBURG PINCUS LLC STREET 2: 466 LEXINGTON AVENUE CITY: NEW YORK STATE: NY ZIP: 10017 BUSINESS PHONE: 212-878-0600 MAIL ADDRESS: STREET 1: C/O WARBURG PINCUS LLC STREET 2: 466 LEXINGTON AVENUE CITY: NEW YORK STATE: NY ZIP: 10017 SC 13D/A 1 w4613799b.txt FIRST AMENDMENT SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A (Amendment No. 1) Under the Securities Exchange Act of 1934* WuXi PharmaTech (Cayman) Inc. ----------------------------- (Name of Issuer) Ordinary Shares, Par Value $0.02 Per Share ------------------------------------------ (Title of Class of Securities) 929352102 --------- (CUSIP Number) Scott A. Arenare, Esq. Managing Director and General Counsel Warburg Pincus LLC 466 Lexington Avenue New York, NY 10017 (212) 878-0600 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) With a copy to: Steven J. Gartner, Esq. Willkie Farr & Gallagher LLP 787 Seventh Avenue New York, NY 10019 (212) 728-8000 December 15, 2008 ----------------- (Date of Event which Requires Filing of This Statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of ss.ss. 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box: [ ] NOTE: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 240.13d-7 for other parties to whom copies are to be sent. * 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). SCHEDULE 13D/A - --------------------- ------------------ CUSIP No. - 929352102 Page 2 of 14 pages - --------------------- ------------------ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Warburg Pincus Private Equity X, L.P. 26-0849130 - ------------- ------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [X] - ------------- ------------------------------------------------------------------ 3 SEC USE ONLY - ------------- ------------------------------------------------------------------ 4 SOURCE OF FUNDS WC - ------------- ------------------------------------------------------------------ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] - ------------- ------------------------------------------------------------------ 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------- ----------- ----------------------------------------- 7 SOLE VOTING POWER -0- ----------- ----------------------------------------- NUMBER OF SHARES BENEFICIALLY OWNED 8 SHARED VOTING POWER BY EACH REPORTING PERSON WITH 34,912,216* ----------- ----------------------------------------- 9 SOLE DISPOSITIVE POWER -0- ----------- ----------------------------------------- 10 SHARED DISPOSITIVE POWER 34,912,216* - ------------- ------------------------------------------------------------------ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 34,912,216* - ------------- ------------------------------------------------------------------ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] - ------------- ------------------------------------------------------------------ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.6% - ------------- ------------------------------------------------------------------ 14 TYPE OF REPORTING PERSON PN - ------------- ------------------------------------------------------------------ * See Item 3. 2 SCHEDULE 13D/A - --------------------- ------------------ CUSIP No. - 929352102 Page 3 of 14 pages - --------------------- ------------------ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Warburg Pincus X Partners, L.P. 26-0869910 - ------------- ------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [X] - ------------- ------------------------------------------------------------------ 3 SEC USE ONLY - ------------- ------------------------------------------------------------------ 4 SOURCE OF FUNDS WC - ------------- ------------------------------------------------------------------ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] - ------------- ------------------------------------------------------------------ 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------- ----------- ----------------------------------------- 7 SOLE VOTING POWER -0- ----------- ----------------------------------------- NUMBER OF SHARES BENEFICIALLY OWNED 8 SHARED VOTING POWER BY EACH REPORTING PERSON WITH 1,116,896* ----------- ----------------------------------------- 9 SOLE DISPOSITIVE POWER -0- ----------- ----------------------------------------- 10 SHARED DISPOSITIVE POWER 1,116,896* - ------------- ------------------------------------------------------------------ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,116,896* - ------------- ------------------------------------------------------------------ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] - ------------- ------------------------------------------------------------------ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1% - ------------- ------------------------------------------------------------------ 14 TYPE OF REPORTING PERSON PN - ------------- ------------------------------------------------------------------ * See Item 3. 3 SCHEDULE 13D/A - --------------------- ------------------ CUSIP No. - 929352102 Page 4 of 14 pages - --------------------- ------------------ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Warburg Pincus X, L.P. 26-0403670 - ------------- ------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [X] - ------------- ------------------------------------------------------------------ 3 SEC USE ONLY - ------------- ------------------------------------------------------------------ 4 SOURCE OF FUNDS N/A - ------------- ------------------------------------------------------------------ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] - ------------- ------------------------------------------------------------------ 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------- ----------- ----------------------------------------- 7 SOLE VOTING POWER -0- ----------- ----------------------------------------- NUMBER OF SHARES BENEFICIALLY OWNED 8 SHARED VOTING POWER BY EACH REPORTING PERSON WITH 36,029,112* ----------- ----------------------------------------- 9 SOLE DISPOSITIVE POWER -0- ----------- ----------------------------------------- 10 SHARED DISPOSITIVE POWER 36,029,112* - ------------- ------------------------------------------------------------------ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 36,029,112* - ------------- ------------------------------------------------------------------ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] - ------------- ------------------------------------------------------------------ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.9% - ------------- ------------------------------------------------------------------ 14 TYPE OF REPORTING PERSON PN - ------------- ------------------------------------------------------------------ * See Item 3. 4 SCHEDULE 13D/A - --------------------- ------------------ CUSIP No. - 929352102 Page 5 of 14 pages - --------------------- ------------------ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Warburg Pincus X LLC 26-0403605 - ------------- ------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [X] - ------------- ------------------------------------------------------------------ 3 SEC USE ONLY - ------------- ------------------------------------------------------------------ 4 SOURCE OF FUNDS N/A - ------------- ------------------------------------------------------------------ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] - ------------- ------------------------------------------------------------------ 6 CITIZENSHIP OR PLACE OF ORGANIZATION New York - -------------------------- ----------- ----------------------------------------- 7 SOLE VOTING POWER -0- ----------- ----------------------------------------- NUMBER OF SHARES BENEFICIALLY OWNED 8 SHARED VOTING POWER BY EACH REPORTING PERSON WITH 36,029,112* ----------- ----------------------------------------- 9 SOLE DISPOSITIVE POWER -0- ----------- ----------------------------------------- 10 SHARED DISPOSITIVE POWER 36,029,112* - ------------- ------------------------------------------------------------------ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 36,029,112* - ------------- ------------------------------------------------------------------ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] - ------------- ------------------------------------------------------------------ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.9% - ------------- ------------------------------------------------------------------ 14 TYPE OF REPORTING PERSON OO - ------------- ------------------------------------------------------------------ * See Item 3. 5 SCHEDULE 13D/A - --------------------- ------------------ CUSIP No. - 929352102 Page 6 of 14 pages - --------------------- ------------------ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Warburg Pincus Partners, LLC 13-4069737 - ------------- ------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [X] - ------------- ------------------------------------------------------------------ 3 SEC USE ONLY - ------------- ------------------------------------------------------------------ 4 SOURCE OF FUNDS N/A - ------------- ------------------------------------------------------------------ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] - ------------- ------------------------------------------------------------------ 6 CITIZENSHIP OR PLACE OF ORGANIZATION New York - -------------------------- ----------- ----------------------------------------- 7 SOLE VOTING POWER -0- ----------- ----------------------------------------- NUMBER OF SHARES BENEFICIALLY OWNED 8 SHARED VOTING POWER BY EACH REPORTING PERSON WITH 36,029,112* ----------- ----------------------------------------- 9 SOLE DISPOSITIVE POWER -0- ----------- ----------------------------------------- 10 SHARED DISPOSITIVE POWER 36,029,112* - ------------- ------------------------------------------------------------------ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 36,029,112* - ------------- ------------------------------------------------------------------ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] - ------------- ------------------------------------------------------------------ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.9% - ------------- ------------------------------------------------------------------ 14 TYPE OF REPORTING PERSON OO - ------------- ------------------------------------------------------------------ * See Item 3. 6 SCHEDULE 13D/A - --------------------- ------------------ CUSIP No. - 929352102 Page 7 of 14 pages - --------------------- ------------------ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Warburg Pincus LLC 13-3536050 - ------------- ------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [X] - ------------- ------------------------------------------------------------------ 3 SEC USE ONLY - ------------- ------------------------------------------------------------------ 4 SOURCE OF FUNDS N/A - ------------- ------------------------------------------------------------------ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] - ------------- ------------------------------------------------------------------ 6 CITIZENSHIP OR PLACE OF ORGANIZATION New York - -------------------------- ----------- ----------------------------------------- 7 SOLE VOTING POWER -0- ----------- ----------------------------------------- NUMBER OF SHARES BENEFICIALLY OWNED 8 SHARED VOTING POWER BY EACH REPORTING PERSON WITH 36,029,112* ----------- ----------------------------------------- 9 SOLE DISPOSITIVE POWER -0- ----------- ----------------------------------------- 10 SHARED DISPOSITIVE POWER 36,029,112* - ------------- ------------------------------------------------------------------ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 36,029,112* - ------------- ------------------------------------------------------------------ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] - ------------- ------------------------------------------------------------------ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.9% - ------------- ------------------------------------------------------------------ 14 TYPE OF REPORTING PERSON OO - ------------- ------------------------------------------------------------------ * See Item 3. 7 SCHEDULE 13D/A - --------------------- ------------------ CUSIP No. - 929352102 Page 8 of 14 pages - --------------------- ------------------ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Warburg Pincus & Co. 13-6358475 - ------------- ------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [X] - ------------- ------------------------------------------------------------------ 3 SEC USE ONLY - ------------- ------------------------------------------------------------------ 4 SOURCE OF FUNDS N/A - ------------- ------------------------------------------------------------------ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] - ------------- ------------------------------------------------------------------ 6 CITIZENSHIP OR PLACE OF ORGANIZATION New York - -------------------------- ----------- ----------------------------------------- 7 SOLE VOTING POWER -0- ----------- ----------------------------------------- NUMBER OF SHARES BENEFICIALLY OWNED 8 SHARED VOTING POWER BY EACH REPORTING PERSON WITH 36,029,112* ----------- ----------------------------------------- 9 SOLE DISPOSITIVE POWER -0- ----------- ----------------------------------------- 10 SHARED DISPOSITIVE POWER 36,029,112* - ------------- ------------------------------------------------------------------ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 36,029,112* - ------------- ------------------------------------------------------------------ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] - ------------- ------------------------------------------------------------------ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.9% - ------------- ------------------------------------------------------------------ 14 TYPE OF REPORTING PERSON PN - ------------- ------------------------------------------------------------------ * See Item 3. 8 SCHEDULE 13D/A - --------------------- ------------------ CUSIP No. - 929352102 Page 9 of 14 pages - --------------------- ------------------ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Charles R. Kaye - ------------- ------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [X] - ------------- ------------------------------------------------------------------ 3 SEC USE ONLY - ------------- ------------------------------------------------------------------ 4 SOURCE OF FUNDS N/A - ------------- ------------------------------------------------------------------ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] - ------------- ------------------------------------------------------------------ 6 CITIZENSHIP OR PLACE OF ORGANIZATION United States of America - -------------------------- ----------- ----------------------------------------- 7 SOLE VOTING POWER -0- ----------- ----------------------------------------- NUMBER OF SHARES BENEFICIALLY OWNED 8 SHARED VOTING POWER BY EACH REPORTING PERSON WITH 36,029,112* ----------- ----------------------------------------- 9 SOLE DISPOSITIVE POWER -0- ----------- ----------------------------------------- 10 SHARED DISPOSITIVE POWER 36,029,112* - ------------- ------------------------------------------------------------------ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 36,029,112* - ------------- ------------------------------------------------------------------ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] - ------------- ------------------------------------------------------------------ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.9% - ------------- ------------------------------------------------------------------ 14 TYPE OF REPORTING PERSON IN - ------------- ------------------------------------------------------------------ * See Item 3. 9 SCHEDULE 13D/A - --------------------- ------------------ CUSIP No. - 929352102 Page 10 of 14 pages - --------------------- ------------------ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Joseph P. Landy - ------------- ------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [X] - ------------- ------------------------------------------------------------------ 3 SEC USE ONLY - ------------- ------------------------------------------------------------------ 4 SOURCE OF FUNDS N/A - ------------- ------------------------------------------------------------------ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] - ------------- ------------------------------------------------------------------ 6 CITIZENSHIP OR PLACE OF ORGANIZATION United States of America - -------------------------- ----------- ----------------------------------------- 7 SOLE VOTING POWER -0- ----------- ----------------------------------------- NUMBER OF SHARES BENEFICIALLY OWNED 8 SHARED VOTING POWER BY EACH REPORTING PERSON WITH 36,029,112* ----------- ----------------------------------------- 9 SOLE DISPOSITIVE POWER -0- ----------- ----------------------------------------- 10 SHARED DISPOSITIVE POWER 36,029,112* - ------------- ------------------------------------------------------------------ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 36,029,112* - ------------- ------------------------------------------------------------------ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] - ------------- ------------------------------------------------------------------ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 6.9% - ------------- ------------------------------------------------------------------ 14 TYPE OF REPORTING PERSON IN - ------------- ------------------------------------------------------------------ * See Item 3. 10 This Amendment No. 1 to Schedule 13D ("Amendment No. 1") amends the Schedule 13D originally filed on July 14, 2008 ("Original 13D") by Warburg Pincus Private Equity X, L.P., a Delaware limited partnership ("WP X"), Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WPP X" and together with WP X, the "Funds"), Warburg Pincus X, L.P., a Delaware limited partnership and the sole general partner of each of the Funds ("WP X LP"), Warburg Pincus X LLC ("WP X LLC"), a New York limited liability company and the sole general partner of WP X LP, Warburg Pincus Partners, LLC ("WPP LLC"), a New York limited liability company and the sole member of WP X LLC, Warburg Pincus LLC, a New York limited liability company that manages each of the Funds ("WP LLC"), Warburg Pincus & Co. ("WP"), a New York general partnership and the managing member of WPP LLC, and Messrs. Charles R. Kaye and Joseph P. Landy, each a Managing General Partner of WP and Co-President and Managing Member of WP LLC (Mr. Kaye, Mr. Landy, WP X, WPP X, WP X LP, WP X LLC, WPP LLC, WP LLC and WP collectively being referred to as the "Warburg Pincus Reporting Persons"). This Amendment No. 1 relates to the ordinary shares, par value $0.02 per share (the "Ordinary Shares"), of WuXi PharmaTech (Cayman) Inc., a Cayman Islands corporation (the "Company"). Capitalized terms used but not defined herein have the meaning ascribed thereto in the Original 13D. Except as specifically amended by this Amendment No. 1, items in the Original 13D are unchanged. Item 3. Source and Amount of Funds or Other Consideration Item 3 of the Original 13D is hereby amended by adding the following paragraphs at the end thereof: Between December 5, 2008 and December 16, 2008, WP X purchased 1,116,847 American Depositary Shares (each of which represents eight Ordinary Shares ("ADSs")) in the open market on the dates and at the prices set forth on Schedule I hereto. Between December 5, 2008 and December 16, 2008, WPP X purchased 35,730 ADSs in the open market on the dates and at the prices set forth on Schedule I hereto. The Funds acquired Ordinary Shares (in the form of ADSs) for aggregate consideration (excluding commissions) of approximately $6.9 million in these open market transactions. Such purchases total 1,152,577 ADSs (the "Purchased Securities"). WP X and WPP X obtained the funds used to acquire the Purchased Securities from capital contributions from the respective limited partners of the Funds. Item 5. Interest in Securities of the Issuer Item 5 of the Original 13D is hereby amended by replacing it in its entirety with the following: (a) The percentages used herein are calculated based upon the 525,020,598 Ordinary Shares that were outstanding as of September 30, 2008 as reported in the Company's Form 6-K filed with the Securities and Exchange Commission on November 13, 2008. 11 WP X is the direct owner of 25,977,440 Ordinary Shares and 1,116,847 ADSs, representing approximately 6.6% of the outstanding Ordinary Shares. WPP X is the direct owner of 831,056 Ordinary Shares and 35,730 ADSs, representing less than 1% of the outstanding Ordinary Shares. Accordingly, as of December 16, 2008, the Funds may be deemed to beneficially own an aggregate of 26,808,496 Ordinary Shares and 1,152,577 ADSs, representing approximately 6.9% of the outstanding Ordinary Shares. Due to their respective relationships with the Funds and each other, each of the Warburg Pincus Reporting Persons may be deemed to beneficially own, in the aggregate, 36,029,112 Ordinary Shares. Each of WP, WPP LLC, WP LLC, WP X LLC, WP X LP, Mr. Kaye and Mr. Landy disclaim beneficial ownership (within the meaning of Rule 13d-3 under the Exchange Act) of all of the Ordinary Shares. (b) Each of the Warburg Pincus Reporting Persons is deemed to share with the Funds the power to vote or to direct the vote and to dispose or to direct the disposition of 36,029,112 Ordinary Shares. (c) Between December 5, 2008 and December 16, 2008, each of WP X and WPP X purchased on the open market shares of the Company's Ordinary shares (in the forms of ADSs) in the amounts, on the dates and at the price per ADS set forth on Schedule I hereto. Except as set forth in this Item 5(c) and on Schedule I, no other transactions in the Ordinary Shares were effected during the past sixty days by any of the Warburg Pincus Reporting Persons. (d) Except as set forth in this Item 5, no person other than each respective record owner referred to herein of the Ordinary Shares is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities. (e) Not applicable. 12 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: December 17, 2008 WARBURG PINCUS PRIVATE EQUITY X, L.P. By: Warburg Pincus X, L.P., its general partner By: Warburg Pincus X LLC, its general partner By: Warburg Pincus Partners, LLC, its managing member By: Warburg Pincus & Co., its managing member By: /s/ Scott A. Arenare ------------------------------------------- Name: Scott A. Arenare Title: Partner WARBURG PINCUS X, L.P. By: Warburg Pincus X LLC, its general partner By: Warburg Pincus Partners, LLC, its managing member By: Warburg Pincus & Co., its managing member By: /s/ Scott A. Arenare ------------------------------------------- Name: Scott A. Arenare Title: Partner WARBURG PINCUS X PARTNERS, L.P. By: Warburg Pincus X, L.P., its general partner By: Warburg Pincus X LLC, its general partner By: Warburg Pincus Partners, LLC, its managing member By: Warburg Pincus & Co., its managing member By: /s/ Scott A. Arenare ------------------------------------------- Name: Scott A. Arenare Title: Partner WARBURG PINCUS X LLC By: Warburg Pincus Partners, LLC, its sole member By: Warburg Pincus & Co., its managing member By: /s/ Scott A. Arenare ------------------------------------------- Name: Scott A. Arenare Title: Partner WARBURG PINCUS PARTNERS, LLC By: Warburg Pincus & Co., its managing member By: /s/ Scott A. Arenare ------------------------------------------- Name: Scott A. Arenare Title: Partner WARBURG PINCUS & CO. By: /s/ Scott A. Arenare ------------------------------------------- Name: Scott A. Arenare Title: Partner WARBURG PINCUS LLC By: /s/ Scott A. Arenare ------------------------------------------- Name: Scott A. Arenare Title: Managing Director By: /s/ Scott A. Arenare ------------------------------------------- Name: Charles R. Kaye By: Scott A. Arenare, Attorney-in-Fact* By: /s/ Scott A. Arenare ------------------------------------------- Name: Joseph P. Landy By: Scott A. Arenare, Attorney-in-Fact** * Power of Attorney given by Mr. Kaye was previously filed with the Securities and Exchange Commission on March 2, 2006 as an exhibit to a Schedule 13D filed by Building Products, LLC with respect to Builders FirstSource, Inc. ** Power of Attorney given by Mr. Landy was previously filed with the Securities and Exchange Commission on March 2, 2006 as an exhibit to a Schedule 13D filed by Building Products, LLC with respect to Builders FirstSource, Inc. Schedule I Set forth below is a list of purchases of ADSs made on the open market by WP X and WPPX between December 5, 2008 and December 16, 2008, in their respective amounts and at their respective prices per ADS. Each ADS represents eight Ordinary Shares. WP X Purchases: Date of Purchase Number of ADSs Price Per ADS - ---------------- -------------- ------------- 12/5/2008 775 $4.79 12/5/2008 581 $4.81 12/5/2008 775 $4.82 12/5/2008 4,651 $4.85 12/5/2008 872 $4.87 12/5/2008 97 $4.88 12/5/2008 1,357 $4.89 12/5/2008 44,527 $4.90 12/5/2008 775 $4.97 12/8/2008 678 $5.45 12/8/2008 388 $5.46 12/8/2008 388 $5.47 12/8/2008 5,523 $5.48 12/8/2008 2,004 $5.49 12/8/2008 248,676 $5.50 12/9/2008 1,744 $5.62 12/9/2008 1,938 $5.63 12/9/2008 84,497 $5.65 12/10/2008 291 $5.92 12/10/2008 291 $5.94 12/10/2008 3,101 $5.95 12/11/2008 97 $6.02 12/11/2008 291 $6.03 12/11/2008 1,453 $6.04 12/11/2008 291 $6.05 12/11/2008 97 $6.06 12/11/2008 388 $6.07 12/11/2008 97 $6.08 12/11/2008 1,661 $6.09 12/11/2008 194 $6.11 12/11/2008 5,233 $6.12 12/11/2008 484 $6.13 12/11/2008 872 $6.14 12/11/2008 8,527 $6.15 12/11/2008 3,101 $6.16 12/11/2008 194 $6.19 12/11/2008 3,972 $6.20 12/11/2008 388 $6.21 12/11/2008 194 $6.22 12/11/2008 1,550 $6.23 12/11/2008 1,163 $6.24 12/11/2008 11,143 $6.25 12/11/2008 5,136 $6.26 12/11/2008 3,392 $6.27 12/11/2008 484 $6.28 12/11/2008 291 $6.29 12/11/2008 7,655 $6.30 12/11/2008 194 $6.31 12/11/2008 194 $6.32 12/11/2008 97 $6.33 12/11/2008 12,492 $6.35 12/12/2008 484 $6.16 12/12/2008 194 $6.20 12/12/2008 291 $6.22 12/12/2008 291 $6.23 12/12/2008 911 $6.24 12/12/2008 529 $6.25 12/12/2008 678 $6.26 12/12/2008 872 $6.27 12/12/2008 1,582 $6.28 12/12/2008 2,939 $6.29 12/12/2008 2,294 $6.30 12/12/2008 97 $6.33 12/15/2008 97 $6.19 12/15/2008 194 $6.23 12/15/2008 194 $6.24 12/15/2008 1,260 $6.25 12/15/2008 1,453 $6.29 12/15/2008 194 $6.31 12/15/2008 1,647 $6.32 12/15/2008 4,070 $6.33 12/15/2008 2,713 $6.34 12/15/2008 5,911 $6.35 12/15/2008 194 $6.36 12/15/2008 224,905 $6.40 12/15/2008 97 $6.47 12/15/2008 194 $6.52 12/15/2008 193,508 $6.57 12/16/2008 193,800 $6.10 Total ADSs Acquired: 1,116,847 Total Ordinary Shares Acquired: 8,934,776 WPP X Purchases: Date of Purchase Number of ADSs Price Per ADS - ---------------- -------------- ------------- 12/5/2008 25 $4.79 12/5/2008 19 $4.81 12/5/2008 25 $4.82 12/5/2008 149 $4.85 12/5/2008 28 $4.87 12/5/2008 3 $4.88 12/5/2008 43 $4.89 12/5/2008 1,424 $4.90 12/5/2008 25 $4.97 12/8/2008 22 $5.45 12/8/2008 12 $5.46 12/8/2008 12 $5.47 12/8/2008 177 $5.48 12/8/2008 64 $5.49 12/8/2008 7,956 $5.50 12/9/2008 56 $5.62 12/9/2008 62 $5.63 12/9/2008 2,703 $5.65 12/10/2008 9 $5.92 12/10/2008 9 $5.94 12/10/2008 99 $5.95 12/11/2008 3 $6.02 12/11/2008 9 $6.03 12/11/2008 47 $6.04 12/11/2008 9 $6.05 12/11/2008 3 $6.06 12/11/2008 12 $6.07 12/11/2008 3 $6.08 12/11/2008 54 $6.09 12/11/2008 6 $6.11 12/11/2008 167 $6.12 12/11/2008 16 $6.13 12/11/2008 28 $6.14 12/11/2008 273 $6.15 12/11/2008 99 $6.16 12/11/2008 6 $6.19 12/11/2008 128 $6.20 12/11/2008 12 $6.21 12/11/2008 6 $6.22 12/11/2008 50 $6.23 12/11/2008 37 $6.24 12/11/2008 357 $6.25 12/11/2008 164 $6.26 12/11/2008 108 $6.27 12/11/2008 16 $6.28 12/11/2008 9 $6.29 12/11/2008 245 $6.30 12/11/2008 6 $6.31 12/11/2008 6 $6.32 12/11/2008 3 $6.33 12/11/2008 400 $6.35 12/12/2008 16 $6.16 12/12/2008 6 $6.20 12/12/2008 9 $6.22 12/12/2008 9 $6.23 12/12/2008 29 $6.24 12/12/2008 17 $6.25 12/12/2008 22 $6.26 12/12/2008 28 $6.27 12/12/2008 51 $6.28 12/12/2008 94 $6.29 12/12/2008 73 $6.30 12/12/2008 3 $6.33 12/15/2008 3 $6.19 12/15/2008 6 $6.23 12/15/2008 6 $6.24 12/15/2008 40 $6.25 12/15/2008 47 $6.29 12/15/2008 6 $6.31 12/15/2008 53 $6.32 12/15/2008 130 $6.33 12/15/2008 87 $6.34 12/15/2008 189 $6.35 12/15/2008 6 $6.36 12/15/2008 7,195 $6.40 12/15/2008 3 $6.47 12/15/2008 6 $6.52 12/15/2008 6,192 $6.57 12/16/2008 6,200 $6.10 Total ADSs Acquired: 35,730 Total Ordinary Shares Acquired: 285,840 -----END PRIVACY-ENHANCED MESSAGE-----