IT

SEC source: 0000749251-26-000171 · form4.xml · nonDerivative · entry 2

CESAN RAUL E · CIK 0001023201 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,845

F1 · shares: Reflects a transfer of 4,400 shares from Family Trust #1 to the reporting person directly for no consideration. The reporting person believes that this transfer of shares constitutes a change in form of beneficial ownership of the shares, exempted by Rule 16a-13 under the Securities Exchange Act of 1934, as amended (the "Exchange Act").

SEC source: 0000749251-26-000171 · form4.xml · nonDerivative · entry 1

CESAN RAUL E · CIK 0001023201 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Family Trust #1

Disclosed balance after: 14,000

F1 · shares: Reflects a transfer of 4,400 shares from Family Trust #1 to the reporting person directly for no consideration. The reporting person believes that this transfer of shares constitutes a change in form of beneficial ownership of the shares, exempted by Rule 16a-13 under the Securities Exchange Act of 1934, as amended (the "Exchange Act").

SEC source: 0000749251-26-000169 · form4.xml · derivative · entry 3

Kim Thomas Sang · CIK 0001969228 · EVP, Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,130

Underlying: Common Stock · 1,130 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 RSU's vest in four substantially equal annual installments commencing on May 4, 2024. This represents the 2026 installment.

F1 · derivative.expiration_date: Represents shares acquired upon release of RSUs, which convert into common stock on a one-for-one basis. These RSU's vest in four substantially equal annual installments commencing on May 4, 2024. This represents the 2026 installment.

SEC source: 0000749251-26-000169 · form4.xml · nonDerivative · entry 2

Kim Thomas Sang · CIK 0001969228 · EVP, Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,693

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

SEC source: 0000749251-26-000169 · form4.xml · nonDerivative · entry 1

Kim Thomas Sang · CIK 0001969228 · EVP, Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,048

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 RSU's vest in four substantially equal annual installments commencing on May 4, 2024. This represents the 2026 installment.

SEC source: 0000749251-26-000152 · form4.xml · derivative · entry 1

Bousa Edward Peter · CIK 0001452605 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 117

Underlying: Common Stock · 117 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000150 · form4.xml · derivative · entry 1

Bisson Peter · CIK 0001650029 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,857

Underlying: Common Stock · 170 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000148 · form4.xml · derivative · entry 7

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,197

Underlying: Common Stock · 157 shares

Expires not disclosed

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

F3 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F3 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000148 · form4.xml · derivative · entry 6

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,354

Underlying: Common Stock · 157 shares

Expires not disclosed

F3 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F3 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000148 · form4.xml · nonDerivative · entry 1

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 491

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

SEC source: 0000749251-26-000144 · form4.xml · derivative · entry 3

FERGUSON DIANA SUE · CIK 0001275975 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81

Underlying: Common Stock · 174 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 ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000144 · form4.xml · derivative · entry 2

FERGUSON DIANA SUE · CIK 0001275975 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 255

Underlying: Common Stock · 174 shares

Expires not disclosed

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000144 · form4.xml · nonDerivative · entry 1

FERGUSON DIANA SUE · CIK 0001275975 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,606

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

SEC source: 0000749251-26-000146 · form4.xml · derivative · entry 1

Rus Daniela L · CIK 0001966644 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108

Underlying: Common Stock · 108 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000140 · form4.xml · derivative · entry 3

GUTIERREZ JOSE M · CIK 0001257702 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 226

Underlying: Common Stock · 97 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 ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000140 · form4.xml · derivative · entry 2

GUTIERREZ JOSE M · CIK 0001257702 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 323

Underlying: Common Stock · 97 shares

Expires not disclosed

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000140 · form4.xml · nonDerivative · entry 1

GUTIERREZ JOSE M · CIK 0001257702 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,288

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

SEC source: 0000749251-26-000138 · form4.xml · derivative · entry 3

PAGLIUCA STEPHEN G · CIK 0001240386 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,668

Underlying: Common Stock · 156 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 ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000138 · form4.xml · derivative · entry 2

PAGLIUCA STEPHEN G · CIK 0001240386 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,824

Underlying: Common Stock · 156 shares

Expires not disclosed

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000138 · form4.xml · nonDerivative · entry 1

PAGLIUCA STEPHEN G · CIK 0001240386 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 111,864

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

SEC source: 0000749251-26-000142 · form4.xml · derivative · entry 1

BRESSLER RICHARD J · CIK 0001200604 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,363

Underlying: Common Stock · 170 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000136 · form4.xml · derivative · entry 1

Serra Eileen · CIK 0001721344 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,147

Underlying: Common Stock · 186 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000134 · form4.xml · derivative · entry 1

DYKSTRA KAREN E · CIK 0001198848 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 508

Underlying: Common Stock · 119 shares

Expires not disclosed

F1 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F1 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000130 · form4.xml · derivative · entry 5

CESAN RAUL E · CIK 0001023201 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,063

Underlying: Common Stock · 162 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 ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000130 · form4.xml · derivative · entry 4

CESAN RAUL E · CIK 0001023201 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,225

Underlying: Common Stock · 162 shares

Expires not disclosed

F2 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F2 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000130 · form4.xml · nonDerivative · entry 1

CESAN RAUL E · CIK 0001023201 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,445

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

SEC source: 0000749251-26-000132 · form4.xml · derivative · entry 4

FUCHS ANNE SUTHERLAND · CIK 0001246335 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,577

Underlying: Common Stock · 87 shares

Expires not disclosed

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

F3 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F3 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000132 · form4.xml · derivative · entry 3

FUCHS ANNE SUTHERLAND · CIK 0001246335 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,664

Underlying: Common Stock · 87 shares

Expires not disclosed

F3 · derivative.exercise_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

F3 · derivative.expiration_date: These are Common Stock Equivalents ("CSEs") received as compensation for service as an outside director of Gartner, Inc. They were granted under the Gartner, Inc. Long-Term Incentive Plan ("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 LTIP.

SEC source: 0000749251-26-000132 · form4.xml · nonDerivative · entry 1

FUCHS ANNE SUTHERLAND · CIK 0001246335 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,306

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

SEC source: 0000749251-26-000128 · form4.xml · nonDerivative · entry 8

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Family Trust 3

Disclosed balance after: 1,410

F5 · kind: The reporting person transferred the shares to a family trust, Family Trust 3 ("Family Trust 3"). The reporting person disclaims beneficial ownership of the shares held by Family Trust 3 except to the extent, if any, of his pecuniary interest therein.

F5 · ownership.nature: The reporting person transferred the shares to a family trust, Family Trust 3 ("Family Trust 3"). The reporting person disclaims beneficial ownership of the shares held by Family Trust 3 except to the extent, if any, of his pecuniary interest therein.

SEC source: 0000749251-26-000128 · form4.xml · nonDerivative · entry 7

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 334

F5 · kind: The reporting person transferred the shares to a family trust, Family Trust 3 ("Family Trust 3"). The reporting person disclaims beneficial ownership of the shares held by Family Trust 3 except to the extent, if any, of his pecuniary interest therein.

SEC source: 0000749251-26-000128 · form4.xml · nonDerivative · entry 6

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Family Trust 2

Disclosed balance after: 235

F4 · kind: The reporting person transferred the shares to a family trust, Family Trust 2 ("Family Trust 2"). The reporting person disclaims beneficial ownership of the shares held by Family Trust 2 except to the extent, if any, of his pecuniary interest therein.

F4 · ownership.nature: The reporting person transferred the shares to a family trust, Family Trust 2 ("Family Trust 2"). The reporting person disclaims beneficial ownership of the shares held by Family Trust 2 except to the extent, if any, of his pecuniary interest therein.

SEC source: 0000749251-26-000128 · form4.xml · nonDerivative · entry 5

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,744

F4 · kind: The reporting person transferred the shares to a family trust, Family Trust 2 ("Family Trust 2"). The reporting person disclaims beneficial ownership of the shares held by Family Trust 2 except to the extent, if any, of his pecuniary interest therein.

SEC source: 0000749251-26-000128 · form4.xml · nonDerivative · entry 4

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Family Trust 1

Disclosed balance after: 235

F3 · kind: The reporting person transferred the shares to a family trust, Family Trust 1 ("Family Trust 1"). The reporting person disclaims beneficial ownership of the shares held by Family Trust 1 except to the extent, if any, of his pecuniary interest therein.

F3 · ownership.nature: The reporting person transferred the shares to a family trust, Family Trust 1 ("Family Trust 1"). The reporting person disclaims beneficial ownership of the shares held by Family Trust 1 except to the extent, if any, of his pecuniary interest therein.

SEC source: 0000749251-26-000128 · form4.xml · nonDerivative · entry 3

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,979

F3 · kind: The reporting person transferred the shares to a family trust, Family Trust 1 ("Family Trust 1"). The reporting person disclaims beneficial ownership of the shares held by Family Trust 1 except to the extent, if any, of his pecuniary interest therein.

SEC source: 0000749251-26-000128 · form4.xml · nonDerivative · entry 2

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,214

F1 · kind: Pursuant to a power of substitution, the reporting person, who is the trustee of the 2025 GRAT (see footnote 2 below for more information about the 2025 GRAT), transferred the shares from the 2025 GRAT to himself in exchange for a contribution of $336,021 by the reporting person to the 2025 GRAT. The transfer resulted in a decrease in the number of shares the reporting person beneficially owns indirectly through the 2025 GRAT and a corresponding increase in the number of shares the reporting person beneficially owns directly. The reporting person believes that this transfer of shares from the 2025 GRAT constitutes a change in form of beneficial ownership of the shares, exempted by Rule 16a-13 under the Securities Exchange Act of 1934.

SEC source: 0000749251-26-000128 · form4.xml · nonDerivative · entry 1

GRABE WILLIAM O · CIK 0001185567 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · 2025 GRAT

Disclosed balance after: 47,900

F1 · kind: Pursuant to a power of substitution, the reporting person, who is the trustee of the 2025 GRAT (see footnote 2 below for more information about the 2025 GRAT), transferred the shares from the 2025 GRAT to himself in exchange for a contribution of $336,021 by the reporting person to the 2025 GRAT. The transfer resulted in a decrease in the number of shares the reporting person beneficially owns indirectly through the 2025 GRAT and a corresponding increase in the number of shares the reporting person beneficially owns directly. The reporting person believes that this transfer of shares from the 2025 GRAT constitutes a change in form of beneficial ownership of the shares, exempted by Rule 16a-13 under the Securities Exchange Act of 1934.

F2 · ownership.nature: These shares are held in a grantor retained annuity trust created on August 22, 2025 when the reporting person transferred 50,000 Gartner shares to the trust (the "2025 GRAT"). These shares are held in trust for the benefit of the reporting person and his children. The reporting person is the Trustee of the 2025 GRAT.

SEC source: 0000749251-26-000126 · form4.xml · nonDerivative · entry 1

van Ham Dick · CIK 0002054503 · SVP, Global Technology Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 864

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan (as amended and restated effective May 1, 2024) in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0000749251-26-000124 · form4.xml · nonDerivative · entry 1

Safian Craig · CIK 0001610073 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,050

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan (as amended and restated effective May 1, 2024) in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0000749251-26-000120 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · Chairman and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,188,159

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan (as amended and restated effective May 1, 2024) in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0000749251-26-000122 · form4.xml · nonDerivative · entry 1

Rupani Altaf · CIK 0001998915 · EVP, Chief Information Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,157

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan (as amended and restated effective May 1, 2024) in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0000749251-26-000118 · form4.xml · nonDerivative · entry 1

Kranich Robin B · CIK 0001308381 · EVP & CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,598

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan (as amended and restated effective May 1, 2024) in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0000749251-26-000116 · form4.xml · derivative · entry 1

Rus Daniela L · CIK 0001966644 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 507

Underlying: Common Stock · 507 shares

Expires not disclosed

F1 · derivative.exercise_date: One hundred percent (100%) of the RSUs shall vest on May 29, 2026, subject to Grantee's continued service as a director through such date.

F1 · derivative.expiration_date: One hundred percent (100%) of the RSUs shall vest on May 29, 2026, subject to Grantee's continued service as a director through such date.

SEC source: 0000749251-26-000115 · form4.xml · derivative · entry 1

Bousa Edward Peter · CIK 0001452605 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 507

Underlying: Common Stock · 507 shares

Expires not disclosed

F1 · derivative.exercise_date: One hundred percent (100%) of the RSUs shall vest on May 29, 2026, subject to Grantee's continued service as a director through such date.

F1 · derivative.expiration_date: One hundred percent (100%) of the RSUs shall vest on May 29, 2026, subject to Grantee's continued service as a director through such date.

SEC source: 0000749251-26-000110 · form4.xml · derivative · entry 6

Genovese Yvonne · CIK 0001843710 · EVP, Bus. & Tech. Insights

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 892

Underlying: Common Stock · 892 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.

F3 · shares: Represents shares acquired upon the release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vest in four substantially equal annual installments commencing on February 09, 2024. This represents the 2026 installment.

F3 · derivative.exercise_date: Represents shares acquired upon the release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vest in four substantially equal annual installments commencing on February 09, 2024. This represents the 2026 installment.

F3 · derivative.expiration_date: Represents shares acquired upon the release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vest in four substantially equal annual installments commencing on February 09, 2024. This represents the 2026 installment.

SEC source: 0000749251-26-000110 · form4.xml · derivative · entry 5

Genovese Yvonne · CIK 0001843710 · EVP, Bus. & Tech. Insights

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 976 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 · shares: Represents shares acquired upon the release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vest in four substantially equal annual installments commencing on February 09, 2023. This represents the 2026 installment.

F1 · derivative.exercise_date: Represents shares acquired upon the release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vest in four substantially equal annual installments commencing on February 09, 2023. This represents the 2026 installment.

F1 · derivative.expiration_date: Represents shares acquired upon the release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vest in four substantially equal annual installments commencing on February 09, 2023. This represents the 2026 installment.

SEC source: 0000749251-26-000110 · form4.xml · nonDerivative · entry 4

Genovese Yvonne · CIK 0001843710 · EVP, Bus. & Tech. Insights

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,413

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

SEC source: 0000749251-26-000110 · form4.xml · nonDerivative · entry 3

Genovese Yvonne · CIK 0001843710 · EVP, Bus. & Tech. Insights

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,610

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.

F3 · shares: Represents shares acquired upon the release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vest in four substantially equal annual installments commencing on February 09, 2024. This represents the 2026 installment.

SEC source: 0000749251-26-000110 · form4.xml · nonDerivative · entry 2

Genovese Yvonne · CIK 0001843710 · EVP, Bus. & Tech. Insights

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,718

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

SEC source: 0000749251-26-000110 · form4.xml · nonDerivative · entry 1

Genovese Yvonne · CIK 0001843710 · EVP, Bus. & Tech. Insights

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,933

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 the release of RSUs, which convert into common stock on a one-for-one basis. These RSUs vest in four substantially equal annual installments commencing on February 09, 2023. This represents the 2026 installment.