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* Bingle Michael J (Last) (First) (Middle) C/O SILVER LAKE PARTNERS, L.P. 2775 SAND HILL ROAD, SUITE 100 (Street) MENLO PARK CA 94025 (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 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 11/25/2009
	4. If Amendment, Date of 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

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 $0.0005	11/25/2009		S(2)		34,706(2)	D	$19.44(3)	8,896,546	I(1)	By Silver Lake Entities(1)
Common Stock, par value $0.0005	11/27/2009		S(4)		26,900(4)	D	$18.85(5)	8,869,646	I(1)	By Silver Lake Entities(1)
Common Stock, par value $0.0005	11/30/2009		S(6)		65,700(6)	D	$18.61(7)	8,803,946	I(1)	By Silver Lake Entities(1)

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

Explanation of Responses:

1. Owned by Silver Lake Partners, L.P., Silver Lake Investors, L.P., and Silver Lake Technology Investors, L.L.C. (collectively, the "Silver Lake Entities"). Silver Lake Technology Associates, L.L.C. is the General Partner of each of Silver Lake Partners, L.P. and Silver Lake Investors, L.P. Silver Lake Partners Management Company, L.L.C. is the Manager of Silver Lake Technology Investors, L.L.C. Mr. Bingle is a Managing Director of each of Silver Lake Technology Associates, L.L.C. and Silver Lake Technology Management, L.L.C, the managing member of Silver Lake Partners Management Company, L.L.C. As such, Mr. Bingle could be deemed to have a shared voting and/or dispositive power over these shares. However, Mr. Bingle disclaims beneficial ownership of these shares, except to the extent of his pecuniary interest therein.

2. Of the 34,706 shares sold by the Silver Lake Entities on November 25, 2009, (i) Silver Lake Partners, L.P. sold 31,962 shares; (ii) Silver Lake Investors, L.P. sold 919 shares; and Silver Lake Technology Investors, L.L.C. sold 1,825 shares. Such shares were sold pursuant to a Rule 10b5-1 Sales Plan adopted by the Silver Lake Entities with respect to the Common Stock of the Issuer.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.34 to $19.61. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

4. Of the 26,900 shares sold by the Silver Lake Entities on November 27, 2009, (i) Silver Lake Partners, L.P. sold 24,774 shares; (ii) Silver Lake Investors, L.P. sold 712 shares; and Silver Lake Technology Investors, L.L.C. sold 1,414 shares. Such shares were sold pursuant to a Rule 10b5-1 Sales Plan adopted by the Silver Lake Entities with respect to the Common Stock of the Issuer.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.65 to $19.00. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

6. Of the 65,700 shares sold by the Silver Lake Entities on November 30, 2009, (i) Silver Lake Partners, L.P. sold 60,504 shares; (ii) Silver Lake Investors, L.P. sold 1,741 shares; and Silver Lake Technology Investors, L.L.C. sold 3,455 shares. Such shares were sold pursuant to a Rule 10b5-1 Sales Plan adopted by the Silver Lake Entities with respect to the Common Stock of the Issuer.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.35 to $18.96. The Reporting Person undertakes to provide to the Issuer, any secure holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

Remarks:

	/s/ Karen M. King, Attorney-in-Fact for Michael J. Bingle	11/30/2009
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.