Borges Daniel

SEC source: 0001720656-26-000007 · wk-form4_1779826847.xml · nonDerivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

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 February 19, 2026.

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: 0001720656-26-000002 · wk-form4_1771453251.xml · derivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,152

Underlying: Common Stock, par value $.01 per share · 6,537 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Performance Unit ("PU") represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F2 · shares: The PUs were initially granted to the Reporting Person on March 1, 2023. This Form 4 is being filed to reflect the determination by the Compensation Committee, effective as of February 16, 2026, of the actual award of PUs under the grant after completion of the relevant performance period.

F3 · derivative.exercise_date: The PU were initially granted to the Reporting Person on March 1, 2023, and will fully vest on March 1, 2026.

F3 · derivative.expiration_date: The PU were initially granted to the Reporting Person on March 1, 2023, and will fully vest on March 1, 2026.

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · nonDerivative · entry 9

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 288

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · derivative · entry 14

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,207

Underlying: Common Stock · 1,207 shares

Expires not disclosed

F7 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock.

F11 · 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.

F11 · 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: 0001020569-25-000060 · wk-form4_1741138332.xml · derivative · entry 13

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 926

Underlying: Common Stock · 462 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 RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock.

F10 · 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.

F10 · 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: 0001020569-25-000060 · wk-form4_1741138332.xml · derivative · entry 12

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 713

Underlying: Common Stock · 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.

F7 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock.

F9 · 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.

F9 · 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: 0001020569-25-000060 · wk-form4_1741138332.xml · derivative · entry 11

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 649 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 RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock.

F8 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 1,947 shares of Common Stock, were granted to the Reporting Person on March 1, 2022 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 1,947 shares of Common Stock, were granted to the Reporting Person on March 1, 2022 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · derivative · entry 10

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,330 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 PU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F6 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on March 1, 2022. Effective as of February 14, 2025, 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, 2025.

F6 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on March 1, 2022. Effective as of February 14, 2025, 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, 2025.

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · nonDerivative · entry 8

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,721

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · nonDerivative · entry 7

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,895

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 restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2024.

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · nonDerivative · entry 6

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,433

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · nonDerivative · entry 5

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,654

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 restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2023.

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · nonDerivative · entry 4

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,941

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · nonDerivative · entry 3

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,142

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.

F2 · shares: This acquisition is reported to reflect the full vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2022.

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · nonDerivative · entry 2

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,493

SEC source: 0001020569-25-000060 · wk-form4_1741138332.xml · nonDerivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,330

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, 2022. Effective February 14, 2025, 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, 2025.

SEC source: 0001020569-25-000041 · wk-form4_1739918821.xml · derivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,330

Underlying: Common Stock · 5,950 shares

Expires not disclosed

F1 · derivative.exercise_price: Each PU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F2 · shares: The PUs were initially granted to the Reporting Person on March 1, 2022. This Form 4 is being filed to reflect the determination by the Compensation Committee, effective as of February 14, 2025, of the actual award of PUs under the grant after completion of the relevant performance period.

F3 · derivative.exercise_date: The PU were initially granted to the Reporting Person on March 1, 2022, and will fully vest on March 1, 2025.

F3 · derivative.expiration_date: The PU were initially granted to the Reporting Person on March 1, 2022, and will fully vest on March 1, 2025.

SEC source: 0001020569-24-000173 · wk-form4_1718741404.xml · nonDerivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

SEC source: 0001020569-24-000076 · wk-form4_1709764738.xml · nonDerivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,095

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · derivative · entry 13

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,388

Underlying: Common Stock · 1,388 shares

Expires not disclosed

F7 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F11 · derivative.exercise_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F11 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · derivative · entry 12

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,426

Underlying: Common Stock · 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.

F7 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("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: 0001020569-24-000062 · wk-form4_1709677998.xml · derivative · entry 11

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 649

Underlying: Common Stock · 649 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 RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F9 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 1,947 shares of Common Stock, were granted to the Reporting Person on March 1, 2022 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F9 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1,947 shares of Common Stock, were granted to the Reporting Person on March 1, 2022 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · derivative · entry 10

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 821 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 RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F8 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 2,461, were granted to the Reporting Person on March 1, 2021 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 2,461, were granted to the Reporting Person on March 1, 2021 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · derivative · entry 9

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,999 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 PU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F6 · derivative.exercise_date: The PUs were initially granted to the Reporting Person on March 1, 2021. Effective February 22, 2024, 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, 2024.

F6 · derivative.expiration_date: The PUs were initially granted to the Reporting Person on March 1, 2021. Effective February 22, 2024, 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, 2024.

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · nonDerivative · entry 8

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,091

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · nonDerivative · entry 7

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,312

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 restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2023.

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · nonDerivative · entry 6

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,599

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · nonDerivative · entry 5

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,800

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 restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2022.

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · nonDerivative · entry 4

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,151

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · nonDerivative · entry 3

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,424

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.

F2 · shares: This acquisition is reported to reflect the full vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2021.

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · nonDerivative · entry 2

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,603

SEC source: 0001020569-24-000062 · wk-form4_1709677998.xml · nonDerivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,999

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, 2021. Effective February 22, 2024, the Compensation Committee of Iron Mountain Incorporated's Board of Directors (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, 2024.

SEC source: 0001020569-24-000042 · wk-form4_1708988081.xml · derivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,999

Underlying: Common Stock · 1,624 shares

Expires not disclosed

F1 · derivative.exercise_price: Each PU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F2 · shares: The PUs were initially granted to the Reporting Person on March 1, 2021. This Form 4 is being filed to reflect the determination by the Compensation Committee, effective as of February 22, 2024, of the actual award of PUs under the grant after completion of the relevant performance period.

F3 · derivative.expiration_date: The PU were initially granted to the Reporting Person on March 1, 2021, and will fully vest on March 1, 2024.

F2 · balance_after: The PUs were initially granted to the Reporting Person on March 1, 2021. This Form 4 is being filed to reflect the determination by the Compensation Committee, effective as of February 22, 2024, of the actual award of PUs under the grant after completion of the relevant performance period.

SEC source: 0001020569-23-000133 · wf-form4_168618850587427.xml · nonDerivative · entry 1

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

F1 · kind: This transaction was effected pursuant to a 10b5-1 trading plan which was approved and became effective as of March 2, 2023.

SEC source: 0001020569-23-000077 · wf-form4_167780347861414.xml · derivative · entry 7

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,139

Underlying: Common Stock · 2,139 shares

Expires not disclosed

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F6 · derivative.exercise_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F6 · derivative.expiration_date: The RSUs vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-23-000077 · wf-form4_167780347861414.xml · derivative · entry 6

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,298

Underlying: Common Stock · 649 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 RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F5 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 1,947 shares of Common Stock, were granted to the Reporting Person on March 1, 2022 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F5 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1,947 shares of Common Stock, were granted to the Reporting Person on March 1, 2022 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001020569-23-000077 · wf-form4_167780347861414.xml · derivative · entry 5

Borges Daniel · CIK 0001720656 · SVP & Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 821

Underlying: Common Stock · 820 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 RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F4 · derivative.exercise_date: The RSUs, representing a contingent right to receive a total of 2,461 shares of Common Stock, were granted to the Reporting Person on March 1, 2021 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 2,461 shares of Common Stock, were granted to the Reporting Person on March 1, 2021 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.