FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * STARK MICHAEL J   2. Issuer Name and Ticker or Trading Symbol EQUINIX INC [EQIX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) __X__ Other (specify below) Affiliate of Director (Last) (First) (Middle) TWO EMBARCADERO CENTER, SUITE 2200 3. Date of Earliest Transaction (Month/Day/Year) 05/10/2006 (Street) SAN FRANCISCO, CA 94111 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 05/10/2006   S   16,103 D $ 65.65 738,300 I See Notes (1) (2) (3) (4)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
STARK MICHAEL J TWO EMBARCADERO CENTER SUITE 2200 SAN FRANCISCO, CA 94111	X			Affiliate of Director
BLISKA THOMAS EDWARD	X			Affiliate of Director
DUNN DANIEL JOHN	X			Affiliate of Director
Epstein David TWO EMBARCADERO SUITE 2200 SAN FRANCISCO, CA 94111	X			Affiliate of Director
Feuille James TWO EMBARCADERO SUITE 2200 SAN FRANCISCO, CA 94111	X			Affiliate of Director
HROMADKO GARY 301 VELOCITY WAY 5TH FLOOR FOSTER CITY, CA 94404	X			Affiliate of Director
KAUFMAN SEYMOUR F	X			Affiliate of Director

Signatures

Michael J. Stark		05/12/2006
**Signature of Reporting Person		Date
Thomas Edward Bliska		05/12/2006
**Signature of Reporting Person		Date
Daniel John Dunn		05/12/2006
**Signature of Reporting Person		Date
David Epstein		05/12/2006
**Signature of Reporting Person		Date
James Feuille		05/12/2006
**Signature of Reporting Person		Date
Gary Hromadko		05/12/2006
**Signature of Reporting Person		Date
Seymour F. Kaufman		05/12/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	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 the holder of Class B Units, and other investment funds. Crossover III Management is also the investment adviser to investment funds.
(2)	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.
(3)	Crosslink, Crossover III Management, Ventures IV Holdings, Verwaltungs, Mr. Stark, Mr. Kaufman, Mr. Feuille, Mr. Epstein, Mr. Dunn, Mr. Bliska and Mr. Hromadko are filing this Form 4 jointly and constitute a group, within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934, as amended, but disclaim membership in a group with any other person. These securities are held directly by investment funds to which Crosslink or Crossover III Management is investment adviser (the "Funds") for the benefit of the investors in the Funds.
(4)	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 various control persons of those entities. The Reporting Persons disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

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