X0202 4 2006-03-02 0 0001101239 EQUINIX INC EQIX 0001242239 STARK MICHAEL J TWO EMBARCADERO CENTER SUITE 2200 SAN FRANCISCO CA 94111 1 0 0 1 Affiliate of Director 0001242242 BLISKA THOMAS EDWARD 1 0 0 1 Affiliate of Director 0001242244 DUNN DANIEL JOHN 1 0 0 1 Affiliate of Director 0001318616 Epstein David TWO EMBARCADERO SUITE 2200 SAN FRANCISCO CA 94111 1 0 0 1 Affiliate of Director 0001318214 Feuille James TWO EMBARCADERO SUITE 2200 SAN FRANCISCO CA 94111 1 0 0 1 Affiliate of Director 0001240055 HROMADKO GARY 301 VELOCITY WAY 5TH FLOOR FOSTER CITY CA 94404 1 0 0 1 Affiliate of Director 0001242240 KAUFMAN SEYMOUR F 1 0 0 1 Affiliate of Director Common Stock 2006-03-02 4 S 0 86 52.7576 D 0 D Common Stock 2006-03-02 4 S 0 173 52.36 D 63 D Common Stock 2006-03-06 4 S 0 1436 51.78 D 0 D Common Stock 2006-03-16 4 G 0 1000 54.09 D 33479 D Common Stock 2006-05-03 4 S 0 63 62.2 D 0 D Common Stock 2006-05-15 4 S 0 400 61.9 D 561 D Common Stock 2006-10-16 4 G 0 500 63.81 D 32479 D Common Stock 2006-11-15 4 S 0 5000 73.4583 D 390488 I See Notes Common Stock 2006-12-12 4 G 0 500 77.75 D 31979 D Common Stock 2006-12-13 4 S 0 700 78.0627 D 773 D These securities are beneficially owned directly by Daniel John Dunn, whose relationship to the reporting persons is described in Notes 6, 7 and 8. These securities are beneficially owned directly by Thomas Edward Bliska, whose relationship to the Reporting Persons is described in Notes 6, 7 and 8. These securities are directly beneficially owned by Seymour F. Kaufman, whose relationship to the reporting persons is described in Notes 6, 7 and 8. These securities are directly beneficially owned by Michael J. Stark, whose relationship to the Reporting Persons is describe in Notes 6, 7 and 8. These Securities are directly beneficially owned by David I. Epstein, whose relationship to the Reporting Persons is described in Notes 6, 7 and 8. 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, James Feuille, David I. Epstein, Daniel John Dunn, Thomas Edward Bliska and Gary Hromadko. Crosslink is an investment adviser to investment funds of which Crossover III Management, Ventures IV Holdings or Verwaltungs is the general partner, manager or holder of Class B Units, 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, Mr. Feuille and Mr. Epstein are control persons of Crossover III Management. Mr. Stark is a control person of Ventures IV Holdings and Verwaltungs. Mr. Hromadko is a member of the Issuer's board of directors and serves as the representative of the Reporting Persons. The Reporting Persons are filing this Form 4 jointly, but not as members of a group, and each of them disclaims membership in a group. These securities are held directly by investment funds to which Crosslink or Crossover III Management is investment adviser 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 the Funds, by Crossover III Management, Ventures IV Holdings and Verwaltungs as the general partner, manager or holder of Class B Units of the Funds, and by Mr. Stark, Mr. Kaufman, Mr. Feuille, Mr. Epstein, Mr. Bliska and Mr. Dunn as the control persons of those entities. Each Reporting Person disclaims beneficial ownership of such securities except to the extent of that person's pecuniary interest therein. These securities are directly beneficially owned by James Feuille, whose relationship to the Reporting Persons is described in Notes 6, 7 and 8. Michael J. Stark 2007-03-08 Thomas Edward Bliska 2007-03-08 Daniel John Dunn 2007-03-08 David Epstein 2007-03-08 James Feuille 2007-03-08 Gary Hromadko 2007-03-08 Seymour F. Kaufman 2007-03-08