UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ---------------------- SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 4 ) Equinix, Inc. -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, par value $0.001 per share -------------------------------------------------------------------------------- (Title of Class of Securities) 2944U106 -------------------------------------------------------------------------------- (CUSIP Number) Pek Siok Lan STT Communications Ltd. 51 Cuppage Road # 10-11/17, StarHub Center 229469 Singapore Telephone (65) 6723 8668 Facsimile (65) 6720 7277 Copy to: Michael W. Sturrock Latham & Watkins LLP 80 Raffles Place, #14-20 UOB Plaza 2 Singapore 048624 Telephone (65) 6536 1161 Facsimile (65) 6536 1171 -------------------------------------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) January 11, 2005 -------------------------------------------------------------------------------- (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 Rule 13d-1(c), 13d-1(f) or 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 13d-7 for other parties to whom copies are to be sent. (1) 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 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. 2944U106 13D PAGE 2 OF 15 PAGES -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) TEMASEK HOLDINGS (PRIVATE) LIMITED -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS* OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Singapore -------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF 11,718 SHARES ----------------------------------------------------------------- 8 SHARED VOTING POWER BENEFICIALLY 10,158,530 OWNED BY EACH ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER REPORTING 11,718 PERSON ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER WITH 10,158,530 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 10,170,248(1) -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 39.7% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON* CO -------------------------------------------------------------------------------- (1) The Reporting Person expressly disclaims beneficial ownership of all shares beneficially owned by i-STT Investments Pte Ltd. CUSIP NO. 2944U106 13D PAGE 3 OF 15 PAGES -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) SINGAPORE TECHNOLOGIES TELEMEDIA PTE LTD -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS* OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Singapore -------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF 0 SHARES ----------------------------------------------------------------- 8 SHARED VOTING POWER BENEFICIALLY 10,158,530 OWNED BY EACH ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER REPORTING 0 PERSON ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER WITH 10,158,530 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 10,158,530 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 39.6% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON* CO -------------------------------------------------------------------------------- CUSIP NO. 2944U106 13D PAGE 4 OF 15 PAGES -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) STT COMMUNICATIONS LTD. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS* OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Singapore -------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF 0 SHARES ----------------------------------------------------------------- 8 SHARED VOTING POWER BENEFICIALLY 10,158,530 OWNED BY EACH ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER REPORTING 0 PERSON ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER WITH 10,158,530 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 10,158,530 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 39.6% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON* CO -------------------------------------------------------------------------------- CUSIP NO. 2944U106 13D PAGE 5 OF 15 PAGES -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) i-STT INVESTMENTS PTE LTD -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS* OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Singapore -------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF 0 SHARES ----------------------------------------------------------------- 8 SHARED VOTING POWER BENEFICIALLY 10,158,530 OWNED BY EACH ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER REPORTING 0 PERSON ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER WITH 10,158,530 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 10,158,530 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 39.6% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON* CO -------------------------------------------------------------------------------- Page 6 of 15 Pages This Amendment No. 4 amends the Schedule 13D previously filed by STT Communications Ltd. ("STT Comm") with the Securities and Exchange Commission on October 11, 2002, as amended and restated by Amendment No. 1 to Schedule 13D filed on January 3, 2003 by STT Comm, as further amended by Amendment No. 2 to Schedule 13D filed on December 22, 2003 and as further amended by Amendment No. 3 to Schedule 13D filed on December 30, 2004 (as amended, the "Statement") with respect to the common stock, par value $0.001 per share (the "Common Stock") of Equinix, Inc., a Delaware corporation (the "Issuer"). Capitalized terms used but not defined herein have the meanings given to them in the Statement. ITEM 2. IDENTITY AND BACKGROUND The information regarding the executive officers and directors of the Reporting Persons set forth on Schedule A of the Statement is amended and restated in its entirety as set forth on Schedule A attached hereto, which is incorporated herein by reference. ITEM 5. INTEREST IN SECURITIES OF THE ISSUER Item 5 is hereby amended and restated in its entirety as follows: On January 11, 2005, i-STTI executed a Conversion Agreement with the Issuer by acknowledging and agreeing to the terms of a letter from the Issuer dated January 10, 2005 (the "Conversion Agreement"), pursuant to which the Issuer effected a conversion of 95% of the Notes and 95% of the Payment-In-Kind Notes ("PIK Notes") held by i-STTI into Series A-1 Convertible Preferred Stock of the Issuer at a conversion price of $9.1779 per share with effect from January 1, 2005 (the "Notes Conversion"). In connection with the Notes Conversion, 4,144,216 shares of Series A-1 Convertible Preferred Stock will be issued to i-STTI. The 4,144,216 shares of Series A-1 Convertible Preferred Stock issuable under the Conversion Agreement are convertible into Common Stock of the Issuer on a 1-for-1 basis at the option of i-STTI after January 31, 2005, which is the expiration date of the applicable waiting period under the HSR Act. i-STTI owns beneficially and of record 10,158,530 shares of Common Stock, representing 39.6% of the outstanding shares of Common Stock. The shares include 1,084,686 shares of Common Stock acquired on December 31, 2002, 1,885,728 shares of Common Stock acquired on November 21, 2003, 1,868,667 shares of Common Stock that may be acquired upon conversion of the Series A Convertible Preferred Stock owned of record by i-STTI, 4,144,216 shares of Common Stock that may be acquired upon conversion of the Series A-1 Convertible Preferred Stock acquired upon the Notes Conversion, 209,559 shares of Common Stock that may be acquired upon conversion of the remaining Notes and PIK Notes owned of record by i-STTI as of the date hereof, and 965,674 shares of Common Stock that may be acquired upon the conversion of the Series A Convertible Preferred Stock acquired upon the exercise of the Warrants owned of record by i-STTI. Because of the relationships described in Item 2 above, the Singapore Parent Entities may be deemed to beneficially own the shares owned of record by i-STTI. Temasek disclaims beneficial ownership of the shares owned beneficially and of record by i-STTI. In addition to the share amounts detailed in the preceding paragraph, Temasek may be deemed to beneficially own 11,718 additional shares of Common Stock, representing 0.05% of the outstanding Common Stock. The additional 11,718 shares of Common Stock are owned beneficially and of record by Temasek's indirect, wholly-owned subsidiary, T.H.e Venture Pte Ltd. Page 7 of 15 Pages The calculation of the percentages in the foregoing paragraphs is based on the number of shares of Common Stock disclosed as outstanding as of September 30, 2004 (i.e. 18,459,337 shares of Common Stock), in the Form 10-Q filed by the Issuer on November 4, 2004. Except as set forth in this Statement, to the knowledge of the Reporting Persons, no director or executive officer of any of the Reporting Persons beneficially owns any other securities of the Issuer. In connection with an internal restructuring that was completed on December 31, 2004, the shares of STT owned by STPL were transferred to Temasek with effect from December 31, 2004, and STPL thereafter ceased to be a Reporting Person. Except as described in this Statement, there have been no transactions by the Reporting Persons in securities of the Issuer during the past sixty days. To the knowledge of the Reporting Persons, there have been no transactions by any director or executive officer of any of the Reporting Persons in securities of the Issuer during the past sixty days. ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO SECURITIES OF THE ISSUER The description of the Conversion Agreement is qualified in its entirety by reference to the Conversion Agreement, a copy of which appears as an exhibit to this Statement. ITEM 7. MATERIAL TO BE FILED AS EXHIBITS 1. Conversion Agreement between the Issuer and i-STT Investments Pte Ltd dated as of January 10, 2005. Page 8 of 15 Pages After reasonable inquiry and to the best of its knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. Dated: January 14, 2005 TEMASEK HOLDINGS (PRIVATE) LIMITED By: /s/ Chia Yue Joo ---------------------------------- Name: Chia Yue Joo Title: Managing Director, Legal/Secretariat SINGAPORE TECHNOLOGIES TELEMEDIA PTE LTD By: /s/ Pek Siok Lan ---------------------------------- Name: Pek Siok Lan Title: Company Secretary STT COMMUNICATIONS LTD. By: /s/ Pek Siok Lan ---------------------------------- Name: Pek Siok Lan Title: Company Secretary i-STT INVESTMENTS PTE LTD By: /s/ Pek Siok Lan ---------------------------------- Name: Pek Siok Lan Title: Director Page 9 of 15 Pages EXHIBIT INDEX 1. Conversion Agreement between the Issuer and i-STT Investments Pte Ltd dated as of January 10, 2005. Page 10 of 15 Pages SCHEDULE A The name, present principal occupation and business address of each director and executive officer of the Reporting Persons is set forth below The following is a list of the executive officers and directors of Temasek: