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 *
ValueAct Holdings, L.P.
   2. Issuer Name and Ticker or Trading Symbol
GARTNER INC [IT] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
435 PACIFIC AVENUE, 4TH FLOOR, 		 3. Date of Earliest Transaction (Month/Day/Year)
10/01/2010
(Street)

SAN FRANCISCO, CA 94133		 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, par value $.01 per share               16,790,013 I See footnote (1)

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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
Common Stock Equivalents (CSE) $ 0 10/01/2010   A   458     (2)   (2) Common Stock 458 (3) 15,353 I See footnotes (4) (5)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
ValueAct Holdings, L.P.
435 PACIFIC AVENUE, 4TH FLOOR
SAN FRANCISCO, CA 94133		     X    
ValueAct Capital Master Fund, L.P.
435 PACIFIC AVENUE
4TH FLOOR
SAN FRANCISCO, CA 94133		     X    
VA Partners I, LLC
435 PACIFIC AVENUE, 4TH FLOOR
SAN FRANCISCO, CA 94133		     X    
ValueAct Capital Management, L.P.
435 PACIFIC AVENUE, 4TH FLOOR
SAN FRANCISCO, CA 94133		     X    
ValueAct Capital Management, LLC
435 PACIFIC AVENUE, 4TH FLOOR
SAN FRANCISCO, CA 94133		     X    
ValueAct Holdings GP, LLC
435 PACIFIC AVENUE, 4TH FLOOR
SAN FRANCISCO, CA 94133		     X    

Signatures

 VALUEACT HOLDINGS, L.P., By: VALUEACT HOLDINGS GP, LLC, its General Partner, By:/s/ George F. Hamel. Jr., Chief Operating Officer   10/05/2010
**Signature of Reporting Person Date
 VALUEACT CAPITAL MASTER FUND, L.P., By: VA PARTNERS I, LLC, its General Partner, By:/s/ George F. Hamel. Jr., Chief Operating Officer   10/05/2010
**Signature of Reporting Person Date
 VA PARTNERS I, LLC, By:/s/ George F. Hamel. Jr., Chief Operating Officer   10/05/2010
**Signature of Reporting Person Date
 VALUEACT CAPITAL MANAGEMENT, L.P., By: VALUEACT CAPITAL MANAGEMENT, LLC, its General Partner, By:/s/ George F. Hamel. Jr., Chief Operating Officer   10/05/2010
**Signature of Reporting Person Date
 VALUEACT CAPITAL MANAGEMENT, LLC, By:/s/ George F. Hamel. Jr., Chief Operating Officer   10/05/2010
**Signature of Reporting Person Date
 VALUEACT HOLDINGS GP, LLC, By:/s/ George F. Hamel. Jr., Chief Operating Officer   10/05/2010
**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 reported stock is owned directly by ValueAct Capital Master Fund, L.P. and may be deemed to be beneficially owned by (i) VA Partners I, LLC as General Partner of ValueAct Capital Master Fund, L.P., (ii) ValueAct Capital Management, L.P. as the manager of of ValueAct Capital Master Fund, L.P., (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P., (iv) ValueAct Holdings, L.P. as the sole owner of the limited partnership interests of ValueAct Capital Management, L.P. and the membership interests of ValueAct Capital Management, LLC and as the majority owner of the membership interests of VA Partners I, LLC and (v) ValueAct Holdings GP, LLC as General Partner of ValueAct Holdings, L.P.
(2) These are Common Stock Equivalents received as compensation for Jeffrey W. Ubben's service as an outside director of Gartner, Inc. They were granted under the Company's 2003 Long-Term Incentive Plan (LTIP). The Common Stock Equivalents convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2003 LTIP.
(3) Column 8 is not a required reportable field.
(4) Under an agreement with ValueAct Capital, Jeffrey W. Ubben is deemed to hold the Common Stock Equivalents for the benefit of ValueAct Capital Master Fund, L.P. & indirectly for (i) VA Partners I, LLC as General Partner of ValueAct Capital Master Fund, L.P., (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund, L.P., (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P., (iv) ValueAct Holdings, L.P. as the sole owner of the limited partnership interests of ValueAct Capital Management, L.P. and the membership interests of ValueAct Capital Management, LLC and as the majority owner of the membership interests of VA Partners I, LLC and (v) ValueAct Holdings GP, LLC as General Partner of ValueAct Holdings, L.P.
(5) Each reporting person listed herein disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest therein, and this report shall not be deemed an admission that such person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.
 
Remarks:
Joint Filer Information:

Name: ValueAct Capital Master Fund, L.P.
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133
Designated Filer: ValueAct Holdings, L.P.
Issuer and Ticker: Gartner, Inc. (IT)
Date of Event Requiring Statement: 10/01/2010

Name: VA Partners I, LLC
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133
Designated Filer: ValueAct Holdings, L.P.
Issuer and Ticker: Gartner, Inc. (IT)
Date of Event Requiring Statement: 10/01/2010

Name: ValueAct Capital Management, L.P.
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133
Designated Filer: ValueAct Holdings, L.P.
Issuer and Ticker: Gartner, Inc. (IT)
Date of Event Requiring Statement: 10/01/2010

Name: ValueAct Capital Management, LLC
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133
Designated Filer: ValueAct Holdings, L.P.
Issuer and Ticker: Gartner, Inc. (IT)
Date of Event Requiring Statement: 10/01/2010

Name: ValueAct Holdings GP, LLC
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133
Designated Filer: ValueAct Holdings, L.P.
Issuer and Ticker: Gartner, Inc. (IT)
Date of Event Requiring Statement: 10/01/2010

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