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 and COO
(Last)
(First)
(Middle)
301 VELOCITY WAY		 3. Date of Earliest Transaction (Month/Day/Year)
02/14/2006
(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 02/14/2006   M   27,500 A $ 3.25 30,755 D  
Common Stock 02/14/2006   M   7,324 A $ 22.4 38,079 D  
Common Stock 02/14/2006   M   5,176 A $ 29.44 43,255 D  
Common Stock 02/14/2006   S   40,000 (1) D $ 44.7684 3,764 (2) D  
Common Stock               468 I As custodian for children

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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
Stock Option (Right to Buy) $ 3.25 02/14/2006   M     27,500 01/01/2006 03/06/2013 Common Stock 27,500 $ 0 12,500 D  
Stock Option (Right to Buy) $ 22.4 02/14/2006   M     7,324   (3) 04/22/2012 Common Stock 7,324 $ 0 489 D  
Stock Option (Right to Buy) $ 29.44 02/14/2006   M     5,176 12/09/2004 04/09/2011 Common Stock 5,176 $ 0 9,883 D  

Reporting Owners

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

Signatures

 Monica Volta, Attorney-in-Fact   02/16/2006
**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) Average price of $44.7684 consists of the following blocks: 5000 shares at $44.47, 4700 shares at $44.50, 100 shares at $44.51, 200 shares at $44.53, 5000 shares at $44.58, 9800 shares at $44.80, 200 shares at $44.83, 500 shares at $44.88, 900 shares at $44.89, 433 shares at $44.90, 700 shares at $44.91, 400 shares at $44.92, 467 shares at $44.95, 6000 shares at $45, 100 shares at $45.01, 100 shares at $45.03, 4774 shares at $45.05, 400 shares at $45.08 and 226 shares at $45.09.
(2) Includes 509 shares acquired on 2/14/2006 pursuant to the Issuer's Employee Stock Purchase Plan.
(3) The option vests on a monthly basis from 4/22/2002.

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