IRM

SEC source: 0001566391-26-000008 · wk-form4_1772584292.xml · derivative · entry 16

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 74,069

Underlying: Common Stock, par value $.01 per share · 74,069 shares

Expires not disclosed

F16 · price: Not applicable.

F15 · derivative.exercise_date: This stock option becomes exercisable in three substantially equal annual installments beginning on the first anniversary of the date of grant.

F15 · derivative.expiration_date: This stock option becomes exercisable in three substantially equal annual installments beginning on the first anniversary of the date of grant.

SEC source: 0001566391-26-000008 · wk-form4_1772584292.xml · derivative · entry 15

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.01 per share · 650,674 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.

F13 · derivative.exercise_price: Each PU represents a contingent right to receive one share of Common Stock.

F14 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

F14 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0001566391-26-000008 · wk-form4_1772584292.xml · nonDerivative · entry 2

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 394,634

F2 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the PUs and does not represent a sale.

SEC source: 0001566391-26-000008 · wk-form4_1772584292.xml · nonDerivative · entry 1

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 650,674

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: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 1, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated (the "Company")'s Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0002039171-26-000004 · wk-form4_1772583716.xml · derivative · entry 9

Altamura Michelle Vervais · CIK 0002039171 · EVP, General Counsel, Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,146

Underlying: Common Stock, par value $.01 per share · 1,073 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_price: Each RSU represents a contingent right to receive one share of Common Stock.

F8 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 3,219 shares of Common Stock, were granted to the Reporting Person on March 1, 2025 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F8 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 3,219 shares of Common Stock, were granted to the Reporting Person on March 1, 2025 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0002039171-26-000004 · wk-form4_1772583716.xml · derivative · entry 8

Altamura Michelle Vervais · CIK 0002039171 · EVP, General Counsel, Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 432

Underlying: Common Stock, par value $.01 per share · 432 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_price: Each RSU represents a contingent right to receive one share of Common Stock.

F7 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 1,295 shares of Common Stock, were granted to the Reporting Person on March 1, 2024 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F7 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1,295 shares of Common Stock, were granted to the Reporting Person on March 1, 2024 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0002039171-26-000004 · wk-form4_1772583716.xml · derivative · entry 7

Altamura Michelle Vervais · CIK 0002039171 · EVP, General Counsel, Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.01 per share · 1,458 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_price: Each RSU represents a contingent right to receive one share of Common Stock.

F6 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 4,374 shares of Common Stock, were granted to the Reporting Person on March 1, 2023 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F6 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 4,374 shares of Common Stock, were granted to the Reporting Person on March 1, 2023 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0002039171-26-000004 · wk-form4_1772583716.xml · nonDerivative · entry 6

Altamura Michelle Vervais · CIK 0002039171 · EVP, General Counsel, Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,728

F2 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the RSUs and does not represent a sale.

SEC source: 0002039171-26-000004 · wk-form4_1772583716.xml · nonDerivative · entry 5

Altamura Michelle Vervais · CIK 0002039171 · EVP, General Counsel, Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,085

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: This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on March 1, 2025.

SEC source: 0002039171-26-000004 · wk-form4_1772583716.xml · nonDerivative · entry 4

Altamura Michelle Vervais · CIK 0002039171 · EVP, General Counsel, Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,012

F2 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the RSUs and does not represent a sale.

SEC source: 0002039171-26-000004 · wk-form4_1772583716.xml · nonDerivative · entry 3

Altamura Michelle Vervais · CIK 0002039171 · EVP, General Counsel, Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,156

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: This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on March 1, 2024.

SEC source: 0002039171-26-000004 · wk-form4_1772583716.xml · nonDerivative · entry 2

Altamura Michelle Vervais · CIK 0002039171 · EVP, General Counsel, Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,724

F2 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the RSUs and does not represent a sale.

SEC source: 0002039171-26-000004 · wk-form4_1772583716.xml · nonDerivative · entry 1

Altamura Michelle Vervais · CIK 0002039171 · EVP, General Counsel, Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,210

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: This acquisition is reported to reflect the full vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2023.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · derivative · entry 13

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,692

Underlying: Common Stock, par value $.01 per share · 9,692 shares

Expires not disclosed

F11 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Common Stock.

F14 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 9,692 shares of Common Stock, were granted to the Reporting Person on March 1, 2026 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F14 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 9,692 shares of Common Stock, were granted to the Reporting Person on March 1, 2026 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · derivative · entry 12

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,510

Underlying: Common Stock, par value $.01 per share · 2,754 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.

F11 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Common Stock.

F13 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 8,264 shares of Common Stock, were granted to the Reporting Person on March 1, 2025 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F13 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 8,264 shares of Common Stock, were granted to the Reporting Person on March 1, 2025 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · derivative · entry 11

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.01 per share · 2,663 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.

F11 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Common Stock.

F12 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 7,987 shares of Common Stock, were granted to the Reporting Person on March 1, 2023 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F12 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 7,987 shares of Common Stock, were granted to the Reporting Person on March 1, 2023 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · derivative · entry 10

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.01 per share · 61,113 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.

F8 · derivative.exercise_price: Each PU represents a contingent right to receive one share of Common Stock.

F10 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on July 3, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

F10 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on July 3, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · derivative · entry 9

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.01 per share · 51,919 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.

F8 · derivative.exercise_price: Each PU represents a contingent right to receive one share of Common Stock.

F9 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

F9 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · nonDerivative · entry 8

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,779

F6 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the RSUs and does not represent a sale.

F2 · balance_after: Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · nonDerivative · entry 7

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,110

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: This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on March 1, 2025.

F2 · balance_after: Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · nonDerivative · entry 6

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,356

F6 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the RSUs and does not represent a sale.

F2 · balance_after: Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · nonDerivative · entry 5

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,643

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: This acquisition is reported to reflect the full vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2023.

F2 · balance_after: Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · nonDerivative · entry 4

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,980

F3 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the PUs and does not represent a sale.

F2 · balance_after: Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · nonDerivative · entry 3

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 101,185

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: This acquisition is reported to reflect the full vesting of PUs previously granted to the Reporting Person on July 3, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

F2 · balance_after: Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · nonDerivative · entry 2

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,072

F3 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the PUs and does not represent a sale.

F2 · balance_after: Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

SEC source: 0002045996-26-000004 · wk-form4_1772583349.xml · nonDerivative · entry 1

Bhargava Mithu · CIK 0002045996 · EVP, GM Digital Business Unit

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,174

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: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 1, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

F2 · balance_after: Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · derivative · entry 13

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,104

Underlying: Common Stock, par value $.01 per share · 1,104 shares

Expires not disclosed

F9 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Common Stock.

F13 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 1,104 shares of Common Stock, were granted to the Reporting Person on March 1, 2026 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F13 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1,104 shares of Common Stock, were granted to the Reporting Person on March 1, 2026 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · derivative · entry 12

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 805

Underlying: Common Stock, par value $.01 per share · 402 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.

F9 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Common Stock.

F12 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 1,207 shares of Common Stock, were granted to the Reporting Person on March 1, 2025 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F12 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1,207 shares of Common Stock, were granted to the Reporting Person on March 1, 2025 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · derivative · entry 11

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 463

Underlying: Common Stock, par value $.01 per share · 463 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.

F9 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Common Stock.

F11 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 1,388 shares of Common Stock, were granted to the Reporting Person on March 1, 2024 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F11 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1,388 shares of Common Stock, were granted to the Reporting Person on March 1, 2024 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · derivative · entry 10

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.01 per share · 713 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.

F9 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Common Stock.

F10 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 2,139 shares of Common Stock, were granted to the Reporting Person on March 1, 2023 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F10 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 2,139 shares of Common Stock, were granted to the Reporting Person on March 1, 2023 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · derivative · entry 9

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.01 per share · 9,152 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.

F7 · derivative.exercise_price: Each PU represents a contingent right to receive one share of Common Stock.

F8 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

F8 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · nonDerivative · entry 8

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,189

F4 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the RSUs and does not represent a sale.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · nonDerivative · entry 7

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,373

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.

F6 · shares: This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on March 1, 2025.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · nonDerivative · entry 6

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,971

F4 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the RSUs and does not represent a sale.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · nonDerivative · entry 5

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,183

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: This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on March 1, 2024.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · nonDerivative · entry 4

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,720

F4 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the RSUs and does not represent a sale.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · nonDerivative · entry 3

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,047

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: This acquisition is reported to reflect the full vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2023.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · nonDerivative · entry 2

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,334

F2 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the PUs and does not represent a sale.

SEC source: 0001720656-26-000004 · wk-form4_1772582377.xml · nonDerivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,440

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: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 1, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0001613777-26-000005 · wk-form4_1772581723.xml · derivative · entry 3

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.01 per share · 232,977 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_price: Each PU represents a contingent right to receive one share of Common Stock.

F4 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

F4 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0001613777-26-000005 · wk-form4_1772581723.xml · nonDerivative · entry 2

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 326,623

F2 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the PUs and does not represent a sale.

SEC source: 0001613777-26-000005 · wk-form4_1772581723.xml · nonDerivative · entry 1

Hytinen Barry · CIK 0001613777 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 431,495

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: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 1, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0001732058-26-000009 · wk-form4_1772581401.xml · derivative · entry 4

Kidd Mark · CIK 0001732058 · EVP, GM Data Centers & ALM

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.01 per share · 149,768 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_price: Each PU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F5 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

F5 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0001732058-26-000009 · wk-form4_1772581401.xml · nonDerivative · entry 2

Kidd Mark · CIK 0001732058 · EVP, GM Data Centers & ALM

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 137,507

F2 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the PUs and does not represent a sale.

SEC source: 0001732058-26-000009 · wk-form4_1772581401.xml · nonDerivative · entry 1

Kidd Mark · CIK 0001732058 · EVP, GM Data Centers & ALM

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 198,849

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: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 1, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0001769841-26-000005 · wk-form4_1772581010.xml · derivative · entry 3

McIntosh Greg W · CIK 0001769841 · EVP, Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.01 per share · 123,144 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_price: Each PU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F4 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

F4 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0001769841-26-000005 · wk-form4_1772581010.xml · nonDerivative · entry 2

McIntosh Greg W · CIK 0001769841 · EVP, Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,634

F2 · shares: Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the PUs and does not represent a sale.

SEC source: 0001769841-26-000005 · wk-form4_1772581010.xml · nonDerivative · entry 1

McIntosh Greg W · CIK 0001769841 · EVP, Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,251

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: This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 1, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.

SEC source: 0001566391-26-000006 · wk-form4_1771967173.xml · derivative · entry 5

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 384,740

Underlying: Common Stock, par value $.01 per share · 38,474 shares

Expires 2027-02-16

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 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025.

F3 · price: Not applicable.

F2 · derivative.exercise_date: This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

SEC source: 0001566391-26-000006 · wk-form4_1771967173.xml · nonDerivative · entry 2

Meaney William L · CIK 0001566391 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025.