Ownership Submission
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 *
KOEN PHILIP J
   2. Issuer Name and Ticker or Trading Symbol
EQUINIX INC [EQIX] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President & COO
(Last)
(First)
(Middle)
301 VELOCITY WAY		 3. Date of Earliest Transaction (Month/Day/Year)
08/01/2005
(Street)

FOSTER CITY, CA 94404		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ 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 08/01/2005   S   10,060 D $ 44.1161 (1) 8,211 D  
Common Stock 08/02/2005   S   5,143 D $ 42.4286 (2) 3,068 D  
Common Stock 08/03/2005   M   20,000 A $ 3.25 23,068 D  
Common Stock 08/03/2005   S   20,000 D $ 43.5199 (3) 3,068 D  
Common Stock               468 I As custodian for children

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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
Employee Stock Option(Right to Buy) $ 3.25 08/03/2005   M     20,000   (4) 03/06/2013 Common Stock 20,000 $ 0 24,722 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
KOEN PHILIP J
301 VELOCITY WAY
FOSTER CITY, CA 94404		       President & COO  

Signatures

 Melanie Mock, Attorney-in-Fact for Philip J. Koen   08/03/2005
**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) Block sales; 1875 shs @43.93, 2000 shs @43.95, 352 shs @43.97, 500 shs @43.99, 948 shs @44.00, 100 shs @44.04, 100 shs @44.05, 100 shs @44.19, 100 shs @44.32, 3985 shs @44.34
(2) Block sales; 500 shs @43.30, 543 shs @43.32, 500 shs @43.34, 1000 shs @43.35, 100 shs @43.36, 500 shs @43.41, 500 shs @43.51, 500 shs @43.53, 1000 shs @43.60
(3) Block sales; 17500 shs @43.50, 100 shs @43.55, 300 shs @43.62, 2100 shs @43.67
(4) Option vests and becomes exercisable with respect to 1/36 of the option each month for a period of 36 months.

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