IT

SEC source: 0001127602-21-029142 · form4.xml · nonDerivative · entry 5

Kranich Robin B · CIK 0001308381 · EVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,477

F2 · shares: Represents shares withheld that had an aggregate value, based on the market price on the date of exercise, substantially equal to the aggregate exercise price of the SARs.

SEC source: 0001127602-21-029142 · form4.xml · nonDerivative · entry 4

Kranich Robin B · CIK 0001308381 · EVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,908

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents shares acquired upon exercise of SARs.

SEC source: 0001127602-21-029142 · form4.xml · nonDerivative · entry 3

Kranich Robin B · CIK 0001308381 · EVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,003

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

SEC source: 0001127602-21-029142 · form4.xml · nonDerivative · entry 2

Kranich Robin B · CIK 0001308381 · EVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,068

F2 · shares: Represents shares withheld that had an aggregate value, based on the market price on the date of exercise, substantially equal to the aggregate exercise price of the SARs.

SEC source: 0001127602-21-029142 · form4.xml · nonDerivative · entry 1

Kranich Robin B · CIK 0001308381 · EVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,705

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents shares acquired upon exercise of SARs.

SEC source: 0001127602-21-029793 · form4a.xml · nonDerivative · entry 1

Kranich Robin B · CIK 0001308381 · EVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,333

F1 · shares: Represents shares withheld from the settlement of the SARs for the payment of applicable income and payroll tax withholding due upon exercise.

F2 · shares: This amendment is being filed to correct the original Form 4 filed November 15, 2021. The number of shares withheld was incorrectly reported as 5,065 in the original Form 4, due to an administrative error, and has been corrected in this amendment. In addition, the total number of shares owned in Column 5 has been increased to reflect the correct number of shares held by the reporting person after all the transactions reported in the original Form 4.

F2 · balance_after: This amendment is being filed to correct the original Form 4 filed November 15, 2021. The number of shares withheld was incorrectly reported as 5,065 in the original Form 4, due to an administrative error, and has been corrected in this amendment. In addition, the total number of shares owned in Column 5 has been increased to reflect the correct number of shares held by the reporting person after all the transactions reported in the original Form 4.

SEC source: 0001127602-21-028845 · form4.xml · nonDerivative · entry 9

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,147,516

F9 · price: This transaction was executed in multiple trades at prices ranging from $333.91 to $334.29. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001127602-21-028845 · form4.xml · nonDerivative · entry 8

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,148,316

F8 · price: This transaction was executed in multiple trades at prices ranging from $334.36 to $335.31. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001127602-21-028845 · form4.xml · nonDerivative · entry 7

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,152,916

F7 · price: This transaction was executed in multiple trades at prices ranging from $335.32 to $336.31. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001127602-21-028845 · form4.xml · nonDerivative · entry 6

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,158,240

F6 · price: This transaction was executed in multiple trades at prices ranging from $336.47 to $337.46. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001127602-21-028845 · form4.xml · nonDerivative · entry 5

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,163,378

F5 · price: This transaction was executed in multiple trades at prices ranging from $337.48 to $338.46. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001127602-21-028845 · form4.xml · nonDerivative · entry 4

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,167,713

F4 · price: This transaction was executed in multiple trades at prices ranging from $338.51 to $339.49. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001127602-21-028845 · form4.xml · derivative · entry 10

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,329

Underlying: Common Stock · 81,987 shares

Expires 2025-02-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F10 · derivative.exercise_date: These SARs were part of an award that becomes exercisable in four substantially equal annual installments, commencing on February 8, 2019.

SEC source: 0001127602-21-028845 · form4.xml · nonDerivative · entry 3

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,176,453

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

SEC source: 0001127602-21-028845 · form4.xml · nonDerivative · entry 2

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,201,442

F2 · shares: Represents shares withheld that had an aggregate value, based on the market price on the date of exercise, substantially equal to the aggregate exercise price of the SARs.

SEC source: 0001127602-21-028845 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,229,503

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents shares acquired upon exercise of SARs.

SEC source: 0001127602-21-028720 · form4.xml · nonDerivative · entry 1

FUCHS ANNE SUTHERLAND · CIK 0001246335 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,725

SEC source: 0001127602-21-026716 · form4.xml · derivative · entry 1

Serra Eileen · CIK 0001721344 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,840

Underlying: Common Stock · 57 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026720 · form4.xml · derivative · entry 1

FERGUSON DIANA SUE · CIK 0001275975 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34

Underlying: Common Stock · 34 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026711 · form4.xml · derivative · entry 3

SMITH JAMES C · CIK 0001183693 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 143 shares

Expires not disclosed

F1 · kind: This reporting person has elected to receive an immediate distribution of the CSE shares.

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026711 · form4.xml · derivative · entry 2

SMITH JAMES C · CIK 0001183693 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 143

Underlying: Common Stock · 143 shares

Expires not disclosed

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026711 · form4.xml · nonDerivative · entry 1

SMITH JAMES C · CIK 0001183693 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 707,428

F1 · kind: This reporting person has elected to receive an immediate distribution of the CSE shares.

SEC source: 0001127602-21-026713 · form4.xml · derivative · entry 3

CESAN RAUL E · CIK 0001023201 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,063

Underlying: Common Stock · 57 shares

Expires not disclosed

F1 · kind: This reporting person has elected to receive an immediate distribution of the CSE shares.

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026713 · form4.xml · derivative · entry 2

CESAN RAUL E · CIK 0001023201 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,120

Underlying: Common Stock · 57 shares

Expires not disclosed

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026713 · form4.xml · nonDerivative · entry 1

CESAN RAUL E · CIK 0001023201 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,288

F1 · kind: This reporting person has elected to receive an immediate distribution of the CSE shares.

SEC source: 0001127602-21-026703 · form4.xml · derivative · entry 1

Bisson Peter · CIK 0001650029 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,582

Underlying: Common Stock · 55 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026707 · form4.xml · derivative · entry 1

DYKSTRA KAREN E · CIK 0001198848 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,934

Underlying: Common Stock · 31 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026700 · form4.xml · derivative · entry 1

BRESSLER RICHARD J · CIK 0001200604 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,836

Underlying: Common Stock · 73 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026698 · form4.xml · derivative · entry 3

FUCHS ANNE SUTHERLAND · CIK 0001246335 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,577

Underlying: Common Stock · 38 shares

Expires not disclosed

F1 · kind: This reporting person has elected to receive an immediate distribution of the CSE shares.

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026698 · form4.xml · derivative · entry 2

FUCHS ANNE SUTHERLAND · CIK 0001246335 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,615

Underlying: Common Stock · 38 shares

Expires not disclosed

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026698 · form4.xml · nonDerivative · entry 1

FUCHS ANNE SUTHERLAND · CIK 0001246335 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,597

F1 · kind: This reporting person has elected to receive an immediate distribution of the CSE shares.

SEC source: 0001127602-21-026696 · form4.xml · derivative · entry 3

PAGLIUCA STEPHEN G · CIK 0001240386 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,668

Underlying: Common Stock · 49 shares

Expires not disclosed

F1 · kind: This reporting person has elected to receive an immediate distribution of the CSE shares.

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026696 · form4.xml · derivative · entry 2

PAGLIUCA STEPHEN G · CIK 0001240386 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,717

Underlying: Common Stock · 49 shares

Expires not disclosed

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner Common Stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026696 · form4.xml · nonDerivative · entry 1

PAGLIUCA STEPHEN G · CIK 0001240386 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,237

F1 · kind: This reporting person has elected to receive an immediate distribution of the CSE shares.

SEC source: 0001127602-21-026694 · form4.xml · derivative · entry 5

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,197

Underlying: Common Stock · 63 shares

Expires not disclosed

F1 · kind: This reporting person has elected to receive an immediate distribution of the CSE shares.

F4 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner common stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F4 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner common stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026694 · form4.xml · derivative · entry 4

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,260

Underlying: Common Stock · 63 shares

Expires not disclosed

F4 · derivative.exercise_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner common stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

F4 · derivative.expiration_date: These are Common Stock Equivalents ("CSE") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Company's 2014 Long-Term Incentive Plan ("2014 LTIP"). The CSEs convert into Gartner common stock on the date the outside director's continuous status as a director terminates, or as otherwise provided in the 2014 LTIP.

SEC source: 0001127602-21-026694 · form4.xml · nonDerivative · entry 1

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,584

F1 · kind: This reporting person has elected to receive an immediate distribution of the CSE shares.

SEC source: 0001127602-21-025476 · form4.xml · derivative · entry 3

Herkes Claire · CIK 0001843712 · EVP, Conferences

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 206 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: Represents shares acquired upon release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vested in four substantially equal annual installments, commencing on September 15, 2018. This represents the 2021 installment.

F1 · derivative.expiration_date: Represents shares acquired upon release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vested in four substantially equal annual installments, commencing on September 15, 2018. This represents the 2021 installment.

SEC source: 0001127602-21-025476 · form4.xml · nonDerivative · entry 2

Herkes Claire · CIK 0001843712 · EVP, Conferences

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,686

F2 · shares: Represents shares withheld for the payment of applicable income and payroll withholding taxes.

SEC source: 0001127602-21-025476 · form4.xml · nonDerivative · entry 1

Herkes Claire · CIK 0001843712 · EVP, Conferences

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,751

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents shares acquired upon release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vested in four substantially equal annual installments, commencing on September 15, 2018. This represents the 2021 installment.

SEC source: 0001127602-21-025019 · form4.xml · nonDerivative · entry 1

Hensel Scott · CIK 0001674793 · EVP Global Services & Delivery

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,463

SEC source: 0001127602-21-024698 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,147,516

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0001127602-21-024696 · form4.xml · nonDerivative · entry 1

Dawkins Alwyn · CIK 0001439796 · EVP, Global Business Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,109

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0001127602-21-024694 · form4.xml · nonDerivative · entry 1

Kranich Robin B · CIK 0001308381 · EVP & CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,937

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0001127602-21-024691 · form4.xml · nonDerivative · entry 3

Safian Craig · CIK 0001610073 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,961

F2 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0001127602-21-024689 · form4.xml · nonDerivative · entry 3

Kaufman Jules · CIK 0001578939 · EVP, GC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,127

F3 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0001127602-21-024691 · form4.xml · nonDerivative · entry 2

Safian Craig · CIK 0001610073 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,951

F1 · price: This transaction was executed in multiple trades at prices ranging from $307.23 to $307.42. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001127602-21-024691 · form4.xml · nonDerivative · entry 1

Safian Craig · CIK 0001610073 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,112

SEC source: 0001127602-21-024689 · form4.xml · derivative · entry 4

Kaufman Jules · CIK 0001578939 · EVP, GC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,558 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: Represents shares acquired upon release of RSUs, which convert into common stock on a one-for-one basis. The RSUs vest in four substantially equal annual installments, commencing on August 30, 2018. This represents the 2021 installment.

F1 · derivative.expiration_date: Represents shares acquired upon release of RSUs, which convert into common stock on a one-for-one basis. The RSUs vest in four substantially equal annual installments, commencing on August 30, 2018. This represents the 2021 installment.

SEC source: 0001127602-21-024689 · form4.xml · nonDerivative · entry 2

Kaufman Jules · CIK 0001578939 · EVP, GC

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,107

F2 · shares: Represents shares withheld for the payment of applicable income and payroll withholding taxes.