X0202 4 2008-02-21 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 0001318214 Feuille James TWO EMBARCADERO SUITE 2200 SAN FRANCISCO CA 94111 1 0 0 1 Affiliate of Director 0001402738 Alain S Harrus TWO EMBARCADERO CENTER 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 0001402271 MacNaughton Bruce TWO EMBARCADERO CENTER SUITE 2200 SAN FRANCISCO CA 94111 1 0 0 1 Affiliate of Director 0001402270 Rip Peter D TWO EMBARCADERO CENTER SUITE 2200 SAN FRANCISCO CA 94111 1 0 0 1 Affiliate of Director Common Stock 2008-02-21 4 P 0 112363 70.27 A 475865 I See Notes 1, 2, 3 and 4 Common Stock 2008-02-22 4 P 0 119600 70.11 A 595465 I See Notes 1, 2, 3 and 4 The reporting persons (the "Reporting Persons") are Crosslink Capital, Inc. ("Crosslink"), Crosslink Ventures IV Holdings, L.L.C. ("Ventures IV Holdings"), Crosslink Verwaltungs GmbH ("Verwaltungs"), Crossover Fund IV Management, L.L.C. ("Crossover IV Management"), Crossover Fund V Management, L.L.C. ("Crossover V Management"), Delta Growth Management, LLC ("Delta Growth Management") and Ten Mile Management, LLC ("Ten Mile Management"), Michael J. Stark, James Feuille, Daniel John Dunn, Thomas Edward Bliska, Peter D. Rip, Alain S. Harrus, Bruce MacNaughton and Gary Hromadko. Crosslink is an investment adviser to investment funds of which Ventures IV Holdings, Verwaltungs, Crossover IV Management, Crossover V Management, Delta Growth Management or Ten Mile Management is the general partner, manager or the holder of Class B Units, and other investment funds. Mr. Stark is the control person of Crosslink, Verwaltungs, Delta Growth Management and Crossover V Management. Mr. Stark, Mr. Bliska, Mr. Dunn, Mr. Feuille, Mr. Rip, Mr. Harrus and Mr. MacNaughton are the control persons of Ventures IV Holdings. Mr. Stark, Mr. Bliska, Mr. Dunn, Mr. Feuille and Mr. MacNaughton are control persons of Crossover IV Management. Mr. Stark and Mr. Bliska are the control persons of Ten Mile Management. 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 a group, and each of them expressly disclaims membership in a group, within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. These securities are held directly by investment funds to which Crosslink is investment adviser (the "Funds") for the benefit of the investors in the Funds. These securities are indirectly beneficially owned by Crosslink as the investment adviser to the Funds by Ventures IV Holdings and Verwaltungs, Crossover IV Management, Crossover V Management, Delta Growth Management or Ten Mile Management as the general partner, manager or holder of Class B Units of the Funds, and by the various control persons of those entities. The Reporting Persons disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein. Michael J. Stark 2008-02-25 Thomas Edward Bliska 2008-02-25 Daniel John Dunn 2008-02-25 James Feuille 2008-02-25 Alain Harrus 2008-02-25 Gary Hromadko 2008-02-25 Bruce McNaughton 2008-02-25 Peter D. Rip 2008-02-25