X0201 4 2004-03-19 0 0001101239 EQUINIX INC EQIX 0001242242 BLISKA THOMAS EDWARD 1 0 1 1 Affiliate of Director 0001242244 DUNN DANIEL JOHN 1 0 1 1 Affiliate of Director 0001240055 HROMADKO GARY 301 VELOCITY WAY 5TH FLOOR FOSTER CITY CA 94404 1 0 1 1 Affiliate of Director 0001242241 JACIMOVIC VLADIMIR S 1 0 1 1 Affiliate of Director 0001242240 KAUFMAN SEYMOUR F 1 0 1 1 Affiliate of Director 0001242239 STARK MICHAEL J 1 0 1 1 Affiliate of Director Common Stock 2004-03-19 4 C 0 2375000 4 A 2550000 I See Notes Common Stock 2004-03-19 4 C 0 125000 4 A 150000 D Series A-2 Convertible Secured Notes Due 2007 4 2004-03-19 4 C 0 9500000 0 A 2003-06-05 2007-11-01 Common Stock 2375000 0 I See Notes Series A-2 Convertible Secured Notes Due 2007 4 2004-03-19 4 C 0 500000 0 A 2003-06-05 2007-11-01 Common Stock 125000 0 D The reporting persons (the "Reporting Persons") are Crosslink Capital, Inc. ("Crosslink"), Crossover Fund III Management, L.L.C. ("Crossover III Management"), Crosslink Ventures IV Holdings, L.L.C. ("Ventures IV Holdings"), Crosslink Verwaltungs GmbH ("Verwaltungs"), Michael J. Stark, Seymour F. Kaufman, Vladimir S. Jacimovic, Daniel John Dunn, Thomas Edward Bliska, Gary Hromadko and Crosslink Crossover Fund III, L.P. ("Crossover Fund III"). Crosslink is an investment adviser to investment funds of which Crossover III Management, Ventures IV Holdings or Verwaltungs is the general partner, manager or the holder of Class B Units, including Crossover Fund III, and other investment funds. Crossover III Management is also the investment adviser to investment funds. Mr. Stark and Mr. Kaufman are control persons of Crosslink. Mr. Stark, Mr. Kaufman, Mr. Bliska, Mr. Dunn and Mr. Jacimovic are control persons of Crossover III Management. Mr. Stark and Mr. Jacimovic are control persons of Ventures IV Holdings and Verwaltungs. The Reporting Persons purchased the Series A-2 Convertible Secured Notes Due 2007 directly from Equinix, Inc. (the "Issuer") in a private placement on June 5, 2003 (the "Private Placement"). In connection with the Private Placement, the Issuer amended its bylaws to provide that a representative of the Reporting Persons would be nominated to serve as a director of the Issuer. Pursuant to that amendment, Mr. Hromadko became a member of the Issuer's board of directors and serves as that representative. Crosslink, Crossover III Management, Ventures IV Holdings, Verwaltungs, Mr. Stark, Mr. Kaufman, Mr. Jacimovic, Mr. Dunn, Mr. Bliska and Mr. Hromadko are filing this Form 4 jointly as a group, but disclaim membership in a group, within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), with any other person. Crossover Fund III is filing this Form 4 jointly with the other Reporting Persons, but not as a member of a group, and it expressly disclaims membership in a group, within the meaning of Rule 13d-5(b), with any other person. These securities are held directly by investment funds to which Crosslink or Crossover III Management is investment adviser, including Crossover Fund III, for the benefit of the investors in those funds. These securities are indirectly beneficially owned by Crosslink or Crossover III Management as the investment adviser to each of those funds, by Crossover III Management, Ventures IV Holdings and Verwaltungs as the general partner, manager or holder of Class B Units of each of those funds, and by Mr. Stark, Mr. Kaufman, Mr. Jacimovic, Mr. Bliska and Mr. Dunn as the various control persons of those entities. The Reporting Persons, except for Crossover Fund III, disclaim beneficial ownership of such securities except to the extent of their respective pecuniary interest therein. The filing of this Form 4 on behalf of Crossover Fund III should not be construed as an admission that it is, and it disclaims that it is, the beneficial owner as defined in Rule 13d-3 under the Exchange Act, of any of the Stock covered by this Form 4. No client account of Crosslink or Crossover III Management, other than Crossover Fund III, holds more than ten percent of the outstanding stock of the Issuer. These securities are beneficially owned directly by Mr. Hromadko. Thomas Edward Bliska 2004-03-23 Daniel John Dunn 2004-03-23 Gary Hromadko 2004-03-23 Vladimir S. Jacimovic 2004-03-23 Seymour F. Kaufman 2004-03-23 Michael J. Stark 2004-03-23