GARTNER INC — Director's Dealing 2010

May 14, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GARTNER INC (IT)
CIK: 0000749251
Period of Report: 2010-05-12

Reporting Person: WAERN PER ANDERS (SVP, Consulting)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-12	Common Stock	M	18892	$24.70	Acquired	19897	Direct
2010-05-12	Common Stock	D	13843	$24.70	Disposed	6054	Direct
2010-05-12	Common Stock	F	1664	$24.70	Disposed	4390	Direct
2010-05-12	Common Stock	M	12129	$24.70	Acquired	16519	Direct
2010-05-12	Common Stock	D	5455	$24.70	Disposed	11064	Direct
2010-05-12	Common Stock	F	2642	$24.70	Disposed	8422	Direct
2010-05-12	Common Stock	S	1005	$24.70	Disposed	7417	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-05-12	Stock Appreciation Rights	$18.10	M	18892	Disposed	2015-02-15	Common Stock (18892)	Direct
2010-05-12	Stock Appreciation Rights	$11.11	M	12129	Disposed	2016-02-11	Common Stock (12129)	Direct

Footnotes

F1: This stock appreciation right became exercisable in four substantially equal annual installments commencing on 2/15/2009

F2: Represents the simultaneous sale back to the company of this number of shares having an aggregrate value, based on the market price on the date of exercise, substantially equal to the aggregrate exercise price of the SAR.

F3: Represents shares withheld from the settlement of the SAR for the payment of applicable income and payroll tax withholding due upon exercise.

F4: This stock appreciation right became exercisable in four substantially equal annual installments commencing on 2/11/2010.