IRM

SEC source: 0001020569-24-000165 · wk-form4_1717623509.xml · derivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 190,497

Underlying: Common Stock · 15,875 shares

Expires 2025-02-19

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: This stock option, representing a right to purchase a total of 349,247 shares, is fully vested.

SEC source: 0001020569-24-000165 · wk-form4_1717623509.xml · nonDerivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 295,650

SEC source: 0001020569-24-000165 · wk-form4_1717623509.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 311,525

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.

SEC source: 0001020569-24-000165 · wk-form4_1717623509.xml · derivative · entry 5

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 206,372

Underlying: Common Stock · 15,875 shares

Expires 2025-02-19

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: This stock option, representing a right to purchase a total of 349,247 shares, is fully vested.

SEC source: 0001020569-24-000165 · wk-form4_1717623509.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 295,650

SEC source: 0001020569-24-000165 · wk-form4_1717623509.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 311,525

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.

SEC source: 0001020569-24-000159 · wk-form4_1717451126.xml · nonDerivative · entry 2

Allerton Jennifer · CIK 0001618762 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,495

SEC source: 0001020569-24-000159 · wk-form4_1717451126.xml · nonDerivative · entry 1

Allerton Jennifer · CIK 0001618762 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,782

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 30, 2024. The RSUs vest on the grant date.

SEC source: 0001020569-24-000157 · wk-form4_1717450618.xml · nonDerivative · entry 1

Arway Pamela M · CIK 0001464822 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,947

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 30, 2024. The RSUs vest on the grant date.

SEC source: 0001020569-24-000155 · wk-form4_1717449771.xml · derivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,206.257

Underlying: Common Stock · 2,385 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 30, 2024, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 30, 2024, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 30, 2024, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock

SEC source: 0001020569-24-000153 · wk-form4_1717449394.xml · nonDerivative · entry 1

DAUTEN KENT P · CIK 0001049128 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,505,432

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 30, 2024. The RSUs vest on the grant date.

SEC source: 0001020569-24-000151 · wk-form4_1717449274.xml · nonDerivative · entry 1

FORD MONTE E · CIK 0001085361 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,676

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 30, 2024. The RSUs vest on the grant date.

SEC source: 0001020569-24-000149 · wk-form4_1717449156.xml · nonDerivative · entry 1

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,342

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 30, 2024. The RSUs vest on the grant date.

SEC source: 0001020569-24-000147 · wk-form4_1717449076.xml · nonDerivative · entry 1

Murdock Wendy J. · CIK 0001670711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,329

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 30, 2024. The RSUs vest on the grant date.

SEC source: 0001020569-24-000142 · wk-form4_1717448821.xml · derivative · entry 1

Samuels Theodore R. II · CIK 0001688276 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,734.657

Underlying: Common Stock · 2,385 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 30, 2024, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 30, 2024, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 30, 2024, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

SEC source: 0001020569-24-000144 · wk-form4_1717448971.xml · nonDerivative · entry 1

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,120

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 30, 2024. The RSUs vest on the grant date.

SEC source: 0001020569-24-000139 · wk-form4_1717448389.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,852.988

Underlying: Common Stock · 2,385 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 30, 2024, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 30, 2024, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan with respect to certain restricted stock units ("RSUs") received on May 30, 2024, which RSUs vest on the grant date, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

SEC source: 0001020569-24-000136 · wk-form4_1715976233.xml · derivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 222,247

Underlying: Common Stock · 15,875 shares

Expires 2025-02-19

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: This stock option, representing a right to purchase a total of 349,247 shares, is fully vested.

SEC source: 0001020569-24-000136 · wk-form4_1715976233.xml · nonDerivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 295,650

SEC source: 0001020569-24-000136 · wk-form4_1715976233.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 311,525

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.

SEC source: 0001020569-24-000136 · wk-form4_1715976233.xml · derivative · entry 5

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 238,122

Underlying: Common Stock · 15,875 shares

Expires 2025-02-19

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: This stock option, representing a right to purchase a total of 349,247 shares, is fully vested.

SEC source: 0001020569-24-000136 · wk-form4_1715976233.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 295,650

SEC source: 0001020569-24-000136 · wk-form4_1715976233.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 311,525

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.

SEC source: 0001020569-24-000134 · wk-form4_1715204089.xml · nonDerivative · entry 1

Murdock Wendy J. · CIK 0001670711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,944

F1 · price: The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $77.41 to $77.75, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (2).

SEC source: 0001020569-24-000130 · wk-form4_1715028101.xml · nonDerivative · entry 1

MARSON DEBORAH · CIK 0001691591 · EVP, General Counsel, Sec.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 63,286

SEC source: 0001020569-24-000132 · wk-form4_1715029076.xml · nonDerivative · entry 1

Murdock Wendy J. · CIK 0001670711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,491

SEC source: 0001020569-24-000121 · wk-form4_1713821866.xml · derivative · entry 1

Samuels Theodore R. II · CIK 0001688276 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,349.657

Underlying: Common Stock · 385.11 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F2 · shares: These shares give effect to the Reporting Person's quarterly cash compensation for services on the Iron Mountain Incorporated board of directors as if reinvested in Phantom Shares

F3 · price: The price reported in Column 8 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $74.609 to $74.719, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3).

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

SEC source: 0001020569-24-000119 · wk-form4_1713821504.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,467.988

Underlying: Common Stock · 452.086 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F2 · shares: These shares give effect to the Reporting Person's quarterly cash compensation for services on the Iron Mountain Incorporated board of directors as if reinvested in Phantom Shares.

F3 · price: The price reported in Column 8 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $74.609 to $74.719, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3).

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

SEC source: 0001020569-24-000111 · wk-form4_1713387687.xml · derivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 253,997

Underlying: Common Stock · 15,875 shares

Expires 2025-02-19

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: This stock option, representing a right to purchase a total of 349,247 shares, is fully vested.

SEC source: 0001020569-24-000111 · wk-form4_1713387687.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 295,650

SEC source: 0001020569-24-000111 · wk-form4_1713387687.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 311,525

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.

SEC source: 0001020569-24-000108 · wk-form4_1713302055.xml · derivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 269,872

Underlying: Common Stock · 15,875 shares

Expires 2025-02-19

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: This stock option, representing a right to purchase a total of 349,247 shares, is fully vested.

SEC source: 0001020569-24-000108 · wk-form4_1713302055.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 295,650

SEC source: 0001020569-24-000108 · wk-form4_1713302055.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 311,525

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.

SEC source: 0001020569-24-000100 · wk-form4_1712608346.xml · nonDerivative · entry 1

MARSON DEBORAH · CIK 0001691591 · EVP, General Counsel, Sec.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 65,286

SEC source: 0001020569-24-000095 · wk-form4_1712349984.xml · derivative · entry 1

Samuels Theodore R. II · CIK 0001688276 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 964.547

Underlying: Common Stock · 25.992 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F2 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F3 · price: The price reported in Column 8 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $79.989 to $80.149, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3).

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

SEC source: 0001020569-24-000093 · wk-form4_1712349873.xml · derivative · entry 1

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,895.343

Underlying: Common Stock · 15.26 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F2 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F3 · price: The price reported in Column 8 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $79.989 to $80.149, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3).

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

SEC source: 0001020569-24-000091 · wk-form4_1712349740.xml · derivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,821.257

Underlying: Common Stock · 690.932 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F2 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F3 · price: The price reported in Column 8 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $79.989 to $80.149, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3).

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

SEC source: 0001020569-24-000089 · wk-form4_1712349610.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,015.902

Underlying: Common Stock · 289.958 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F2 · shares: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

F3 · price: The price reported in Column 8 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $79.989 to $80.149, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3).

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

F1 · derivative.expiration_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

SEC source: 0001020569-24-000086 · wk-form4_1712093669.xml · derivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,458 shares

Expires 2025-02-19

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: This stock option, representing a right to purchase a total of 4,458 shares, is fully vested.

SEC source: 0001020569-24-000086 · wk-form4_1712093669.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 62,938

SEC source: 0001020569-24-000086 · wk-form4_1712093669.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 67,396

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.

SEC source: 0001020569-24-000082 · wk-form4_1709765272.xml · nonDerivative · entry 1

MARSON DEBORAH · CIK 0001691591 · EVP, General Counsel, Sec.

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 67,286

SEC source: 0001020569-24-000080 · wk-form4_1709765178.xml · nonDerivative · entry 9

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 295,650

F9 · price: The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $79.460 to $79.690, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (9).

SEC source: 0001020569-24-000080 · wk-form4_1709765178.xml · nonDerivative · entry 8

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 300,834

F8 · price: The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $78.460 to $79.435, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (8).

SEC source: 0001020569-24-000080 · wk-form4_1709765178.xml · nonDerivative · entry 7

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 411,628

F7 · price: The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $79.400 to $79.650, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (7).

SEC source: 0001020569-24-000080 · wk-form4_1709765178.xml · nonDerivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 412,792

F6 · price: The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $78.380 to $79.330, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (6).

SEC source: 0001020569-24-000080 · wk-form4_1709765178.xml · nonDerivative · entry 5

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 428,408

F5 · price: The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $79.370 to $79.530, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (5).

SEC source: 0001020569-24-000080 · wk-form4_1709765178.xml · nonDerivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 428,609

F4 · price: The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $78.370 to $79.345, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (4).

SEC source: 0001020569-24-000080 · wk-form4_1709765178.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 432,682

F3 · price: The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $80.015 to $80.300, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3).