SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* VA PARTNERS LLC (Last) (First) (Middle) 435 PACIFIC AVENUE FOURTH FLOOR (Street) SAN FRANCISCO CA 94133 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol GARTNER INC [ IT ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 09/15/2006
	4. If Amendment, Date of 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

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	09/15/2006		P		2,000,000	A	$15.75	2,000,000	I	See Footnote(1)
Common Stock								18,631,646	I	See Footnote(2)

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 Securities Underlying Derivative Security (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: 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

1. Name and Address of Reporting Person* VA PARTNERS LLC (Last) (First) (Middle) 435 PACIFIC AVENUE FOURTH FLOOR (Street) SAN FRANCISCO CA 94133 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* VA Partners III, LLC (Last) (First) (Middle) 435 PACIFIC AVENUE, 4TH FLOOR (Street) SAN FRANCISCO CA 94133 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ValueAct Capital Management, L.P. (Last) (First) (Middle) 435 PACIFIC AVENUE, 4TH FLOOR (Street) SAN FRANCISCO CA 94133 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ValueAct Capital Management, LLC (Last) (First) (Middle) 435 PACIFIC AVENUE, 4TH FLOOR (Street) SAN FRANCISCO CA 94133 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* UBBEN JEFFREY W (Last) (First) (Middle) 435 PACIFIC AVENUE, FOURTH FLOOR (Street) SAN FRANCISCO CA 94133 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* KAMIN PETER H (Last) (First) (Middle) 265 FRANKLIN STREET, 16TH FLOOR (Street) BOSTON MA 02110 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. The reported stock is owned directly by ValueAct Capital Master Fund III, L.P. and may be deemed to be beneficially owned by (i) VA Partners III, LLC as General Partner of ValueAct Capital Master Fund III, L.P., (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund III, L.P. and (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P. Jeffrey W. Ubben is a director of Gartner, Inc. and a Managing Member of VA Partners III, LLC and ValueAct Capital Management, LLC. Peter H. Kamin and George F. Hamel, Jr. are also Managing Members of VA Partners III, LLC and ValueAct Capital Management, LLC. The reporting persons disclaim beneficial ownership of the reported stock except to the extent of their pecuniary interest therein.

2. 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, 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. and (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P. Jeffrey W. Ubben is a director of Gartner, Inc. and a Managing Member of VA Partners, LLC and ValueAct Capital Management, LLC. Peter H. Kamin and George F. Hamel, Jr. are also Managing Members of VA Partners, LLC and ValueAct Capital Management, LLC. The reporting persons disclaim beneficial ownership of the reported stock except to the extent of their pecuniary interest therein.

Remarks:

Joint Filer Information: Name: ValueAct Capital Master Fund, L.P. Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, LLC Issuer and Ticker: Gartner, Inc. Date of Event Requiring Statement: September 15, 2006 Name: ValueAct Capital Master Fund III, L.P. Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, LLC Issuer and Ticker: Gartner, Inc. Date of Event Requiring Statement: September 15, 2006 Name: VA Partners III, LLC Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, LLC Issuer and Ticker: Gartner, Inc. Date of Event Requiring Statement: September 15, 2006 Name: ValueAct Capital Management, L.P. Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, LLC Issuer and Ticker: Gartner, Inc. Date of Event Requiring Statement: September 15, 2006 Name: ValueAct Capital Management, LLC Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, LLC Issuer and Ticker: Gartner, Inc. Date of Event Requiring Statement: September 15, 2006 Name: Jeffrey W. Ubben Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, LLC Issuer and Ticker: Gartner, Inc. Date of Event Requiring Statement: September 15, 2006 Name: George F. Hamel, Jr. Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, LLC Issuer and Ticker: Gartner, Inc. Date of Event Requiring Statement: September 15, 2006 Name: Peter H. Kamin Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, LLC Issuer and Ticker: Gartner, Inc. Date of Event Requiring Statement: September 15, 2006

	VA PARTNERS, LLC, By:/s/ George F. Hamel, Jr., Managing Member	09/18/2006
	VALUEACT CAPITAL MASTER FUND, L.P., By: VA PARTNERS, LLC, its General Partner, By:/s/ George F. Hamel, Jr., Managing Member	09/18/2006
	VALUEACT CAPITAL MASTER FUND III, L.P., By: VA PARTNERS III, LLC, its General Partner, By:/s/ George F. Hamel, Jr., Managing Member	09/18/2006
	VA PARTNERS III, LLC, By:/s/ George F. Hamel, Jr., Managing Member	09/18/2006
	VALUEACT CAPITAL MANAGEMENT, L.P., By: VALUEACT CAPITAL MANAGEMENT, LLC, its General Partner, By:/s/ George F. Hamel, Jr., Managing Member	09/18/2006
	VALUEACT CAPITAL MANAGEMENT, LLC, By:/s/ George F. Hamel, Jr., Managing Member	09/18/2006
	/s/ Jeffrey W. Ubben	09/18/2006
	/s/ George F. Hamel, Jr.	09/18/2006
	/s/ Peter H. Kamin	09/18/2006
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
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