HALL EUGENE A

SEC source: 0001127602-24-026864 · 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: 1,192,891

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: 0001127602-24-024006 · form4.xml · nonDerivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,143,401

F5 · price: This transaction was executed in multiple trades at prices ranging from $506.76 to $507.19. 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: 0001127602-24-024006 · form4.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,151,197

F4 · price: This transaction was executed in multiple trades at prices ranging from $505.42 to $506.19. The price 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: 0001127602-24-024006 · form4.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,165,227

F3 · price: This transaction was executed in multiple trades at prices ranging from $504.35 to $505.34. The price 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: 0001127602-24-024006 · form4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,171,195

F2 · price: This transaction was executed in multiple trades at prices ranging from $503.15 to $503.63. The price 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: 0001127602-24-024006 · 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: 1,172,472

F1 · price: This transaction was executed in multiple trades at prices ranging from $502.16 to $503.11. The price 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: 0001127602-24-023436 · 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: 1,177,461

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: 0001127602-24-021480 · form4.xml · derivative · entry 11

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 89,264 shares

Expires 2027-02-05

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 are part of an award that became exercisable in four substantially equal annual installments, commencing on February 5, 2021, and are fully exercisable.

SEC source: 0001127602-24-021480 · form4.xml · nonDerivative · entry 10

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,177,449

F9 · shares: Represents shares withheld for the payment of applicable income and payroll withholding taxes.

SEC source: 0001127602-24-021480 · form4.xml · nonDerivative · entry 9

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,205,169

F8 · 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: 0001127602-24-021480 · form4.xml · nonDerivative · entry 8

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,232,653

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.

F7 · shares: Represents shares acquired upon exercise of SARs.

SEC source: 0001127602-24-021480 · form4.xml · nonDerivative · entry 7

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,143,389

SEC source: 0001127602-24-021480 · form4.xml · nonDerivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,143,394

F6 · price: This transaction was executed in multiple trades at prices ranging from $507.29 to $507.62. 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: 0001127602-24-021480 · form4.xml · nonDerivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,143,694

F5 · price: This transaction was executed in multiple trades at prices ranging from $506.29 to $507.23. 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: 0001127602-24-021480 · form4.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,146,571

F4 · price: This transaction was executed in multiple trades at prices ranging from $505.26 to $506.12. 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: 0001127602-24-021480 · form4.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,148,760

F3 · price: This transaction was executed in multiple trades at prices ranging from $504.17 to $505.12. 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: 0001127602-24-021480 · form4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,150,511

F2 · price: This transaction was executed in multiple trades at prices ranging from $503.07 to $503.99. 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: 0001127602-24-021480 · 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: 1,154,371

F1 · price: This transaction was executed in multiple trades at prices ranging from $502.06 to $503.05. 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: 0001127602-24-017736 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,155,471

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: 0001127602-24-008602 · form4.xml · nonDerivative · entry 4

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,155,457

F4 · price: This transaction was executed in multiple trades at prices ranging from $470.00 to $470.69. 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: 0001127602-24-008602 · form4.xml · nonDerivative · entry 3

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,159,587

F3 · price: This transaction was executed in multiple trades at prices ranging from $468.96 to $469.91. The price 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: 0001127602-24-008602 · form4.xml · nonDerivative · entry 2

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,162,113

F2 · price: This transaction was executed in multiple trades at prices ranging from $468.57 to $469.22. The price 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: 0001127602-24-008602 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,166,358

F1 · price: This transaction was executed in multiple trades at prices ranging from $467.44 to $468.40. The price 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: 0001127602-24-008193 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,174,173

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan (as amended and restated effective September 1, 2021) in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0001127602-24-006868 · form4.xml · derivative · entry 12

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,601

Underlying: Common Stock · 7,534 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.

F5 · derivative.exercise_date: Represents shares acquired following the settlement of the first installment of the performance-based RSUs that were awarded on February 9, 2023 and vested on February 9, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 9, 2024 and convert into common stock on a one-for-one basis.

F5 · derivative.expiration_date: Represents shares acquired following the settlement of the first installment of the performance-based RSUs that were awarded on February 9, 2023 and vested on February 9, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 9, 2024 and convert into common stock on a one-for-one basis.

SEC source: 0001127602-24-006868 · form4.xml · derivative · entry 11

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,390

Underlying: Common Stock · 9,195 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.

F4 · derivative.exercise_date: Represents shares acquired following the settlement of the second installment of the performance-based RSUs that were awarded on February 9, 2022 and vested on February 9, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 9, 2023 and convert into common stock on a one-for-one basis.

F4 · derivative.expiration_date: Represents shares acquired following the settlement of the second installment of the performance-based RSUs that were awarded on February 9, 2022 and vested on February 9, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 9, 2023 and convert into common stock on a one-for-one basis.

SEC source: 0001127602-24-006868 · form4.xml · derivative · entry 10

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,938

Underlying: Common Stock · 20,938 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 · derivative.exercise_date: Represents shares acquired following the settlement of the third installment of the performance-based RSUs that were awarded on February 10, 2021 and vested on February 10, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 10, 2022 and convert into common stock on a one-for-one basis.

F3 · derivative.expiration_date: Represents shares acquired following the settlement of the third installment of the performance-based RSUs that were awarded on February 10, 2021 and vested on February 10, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 10, 2022 and convert into common stock on a one-for-one basis.

SEC source: 0001127602-24-006868 · form4.xml · derivative · entry 9

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 11,195 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 following the settlement of the fourth installment of the performance-based RSUs that were awarded on February 5, 2020 and vested on February 5, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 5, 2021 and convert into common stock on a one-for-one basis.

F1 · derivative.expiration_date: Represents shares acquired following the settlement of the fourth installment of the performance-based RSUs that were awarded on February 5, 2020 and vested on February 5, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 5, 2021 and convert into common stock on a one-for-one basis.

SEC source: 0001127602-24-006868 · form4.xml · nonDerivative · entry 8

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,174,160

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

SEC source: 0001127602-24-006868 · form4.xml · nonDerivative · entry 7

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,177,351

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.

F5 · shares: Represents shares acquired following the settlement of the first installment of the performance-based RSUs that were awarded on February 9, 2023 and vested on February 9, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 9, 2024 and convert into common stock on a one-for-one basis.

SEC source: 0001127602-24-006868 · form4.xml · nonDerivative · entry 6

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,169,817

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

SEC source: 0001127602-24-006868 · form4.xml · nonDerivative · entry 5

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,173,644

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.

F4 · shares: Represents shares acquired following the settlement of the second installment of the performance-based RSUs that were awarded on February 9, 2022 and vested on February 9, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 9, 2023 and convert into common stock on a one-for-one basis.

SEC source: 0001127602-24-006868 · form4.xml · nonDerivative · entry 4

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,164,449

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

SEC source: 0001127602-24-006868 · form4.xml · nonDerivative · entry 3

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,173,327

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 following the settlement of the third installment of the performance-based RSUs that were awarded on February 10, 2021 and vested on February 10, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 10, 2022 and convert into common stock on a one-for-one basis.

SEC source: 0001127602-24-006868 · form4.xml · nonDerivative · entry 2

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,152,389

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

SEC source: 0001127602-24-006868 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,156,928

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 following the settlement of the fourth installment of the performance-based RSUs that were awarded on February 5, 2020 and vested on February 5, 2024. The RSUs vest in four substantially equal annual installments, commencing on February 5, 2021 and convert into common stock on a one-for-one basis.

SEC source: 0001127602-24-004759 · form4.xml · derivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,135

Underlying: Common Stock · 30,135 shares

Expires not disclosed

F1 · derivative.exercise_date: These performance-based RSUs were awarded on February 9, 2023 and vest in four substantially equal annual installments, commencing on February 9, 2024. This represents the actual number of RSUs awarded after the performance metric was certified.

F1 · derivative.expiration_date: These performance-based RSUs were awarded on February 9, 2023 and vest in four substantially equal annual installments, commencing on February 9, 2024. This represents the actual number of RSUs awarded after the performance metric was certified.

SEC source: 0001127602-24-004519 · form4.xml · derivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,291

Underlying: Common Stock · 27,291 shares

Expires 2031-02-08

F1 · shares: These SARs become exercisable in four substantially equal annual installments, commencing on February 8, 2025

F1 · derivative.exercise_date: These SARs become exercisable in four substantially equal annual installments, commencing on February 8, 2025

SEC source: 0001127602-23-028731 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,145,733

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan (as amended and restated effective September 1, 2021) in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0001127602-23-027016 · form4.xml · nonDerivative · entry 8

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,145,719

F8 · price: This transaction was executed in multiple trades at prices ranging from $392.64 to $392.75. 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: 0001127602-23-027016 · form4.xml · nonDerivative · entry 7

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,146,136

F7 · price: This transaction was executed in multiple trades at prices ranging from $392.77 to $393.75. 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: 0001127602-23-027016 · form4.xml · nonDerivative · entry 6

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,150,682

F6 · price: This transaction was executed in multiple trades at prices ranging from $393.77 to $394.75. The price 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: 0001127602-23-027016 · form4.xml · nonDerivative · entry 5

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,158,820

F5 · price: This transaction was executed in multiple trades at prices ranging from $394.77 to $395.74. The price 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: 0001127602-23-027016 · form4.xml · nonDerivative · entry 4

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,168,017

F4 · price: This transaction was executed in multiple trades at prices ranging from $395.74 to $396.73. The price 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: 0001127602-23-027016 · form4.xml · derivative · entry 9

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 92,192 shares

Expires 2026-02-06

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.

F9 · derivative.exercise_date: These SARs are part of an award that became exercisable in four substantially equal annual installments, commencing on February 6, 2020, and are fully exercisable.

SEC source: 0001127602-23-027016 · form4.xml · nonDerivative · entry 3

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,181,265

F3 · shares: Represents shares withheld for the payment of applicable income and payroll withholding taxes.

SEC source: 0001127602-23-027016 · form4.xml · nonDerivative · entry 2

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,204,326

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: 0001127602-23-027016 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,237,911

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: 0001127602-23-023716 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,145,719

F1 · shares: Represents shares acquired under Gartner, Inc.'s 2011 Employee Stock Purchase Plan (as amended and restated effective September 1, 2021) in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c).

SEC source: 0001127602-23-018664 · form4.xml · nonDerivative · entry 1

HALL EUGENE A · CIK 0001198849 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,145,702

F1 · price: This transaction was executed in multiple trades at prices ranging from $345.15 to $345.85. The price 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.