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 * HALL EUGENE A   2. Issuer Name and Ticker or Trading Symbol GARTNER INC [TT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) CEO (Last) (First) (Middle) 56 TOP GALLANT ROAD, P.O. BOX 10212 3. Date of Earliest Transaction (Month/Day/Year) 02/06/2018 (Street) STAMFORD, CT 06904-2212 4. If Amendment, Date Original Filed(Month/Day/Year) 02/08/2018 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 02/06/2018   M   2,524 (2) A $ 0 1,192,073 D

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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

Restricted Stock Units

$ 0

02/06/2018

A

10,093

(1)

(1)

Common Stock

10,093

$ 0

10,093 (3)

D

Restricted Stock Units

$ 0

02/06/2018

M

2,524

(2)

(2)

Common Stock

2,524

$ 0

7,569 (3)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
HALL EUGENE A 56 TOP GALLANT ROAD P.O. BOX 10212 STAMFORD, CT 06904-2212	X		CEO

Signatures

/s/ Kevin Tang for Eugene A. Hall		02/12/2018
**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)	These performance-based RSUs were awarded on February 6, 2017 and vest in four substantially equal annual installments, commencing on 2/6/2018. This represents the actual number of RSUs awarded after the performance metric was certified.
(2)	Represents shares acquired upon the vesting of the first installment of these RSUs on 2/6/2018.
(3)	The original Form 4 filed on February 8, 2018 is amended by this Form 4 amendment to reflect the correct number of these performance-based RSUs held by the reporting person after the reported transactions. The original Form 4 erroneously reported that 20,186 and 17,662 of these performance-based RSUs were outstanding after the reported award and vesting transactions, respectively. The correct number of these performance-based RSUs held by the reporting person after such transactions are reported in this Form 4 amendment. The transactions listed in Table 1 and Table 2 of this Form 4 amendment are otherwise not new or revised.

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