IRM

SEC source: 0001566391-25-000006 · wk-form4_1759521934.xml · nonDerivative · entry 3

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 August 18, 2023.

F3 · price: The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $102.290 to $103.260, inclusive. The Reporting Person undertakes to provide 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).

SEC source: 0001566391-25-000006 · wk-form4_1759521934.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,062

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 18, 2023.

F2 · 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 $101.29 to $102.285, 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: 0001566391-25-000006 · wk-form4_1759521934.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,125

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 August 18, 2023.

SEC source: 0001732058-25-000006 · wk-form4_1759521865.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 73,081

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 20, 2025.

SEC source: 0001020569-25-000183 · wk-form4_1757364519.xml · nonDerivative · entry 1

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Rakowich Living Trust

Disclosed balance after: 25,465

F1 · ownership.nature: Shares held of record by Rakowich Living Trust. The reporting person is the sole trustee.

SEC source: 0001020569-25-000181 · wk-form4_1757102760.xml · derivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 207,375

Underlying: Common Stock, par value $.01 per share · 69,125 shares

Expires 2026-02-18

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 August 18, 2023.

F3 · derivative.exercise_date: This stock option, representing a right to purchase a total of 829,506 shares, is fully vested.

SEC source: 0001020569-25-000181 · wk-form4_1757102760.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 August 18, 2023.

SEC source: 0001020569-25-000181 · wk-form4_1757102760.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,125

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 August 18, 2023.

SEC source: 0001020569-25-000178 · wk-form4_1756932873.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 79,081

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 20, 2025.

SEC source: 0001020569-25-000170 · wk-form4_1754425596.xml · derivative · entry 7

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 276,500

Underlying: Common Stock, par value $.01 per share · 69,125 shares

Expires 2026-02-18

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 August 18, 2023.

F6 · derivative.exercise_date: This stock option, representing a right to purchase a total of 829,506 shares, is fully vested.

SEC source: 0001020569-25-000170 · wk-form4_1754425596.xml · nonDerivative · entry 5

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 August 18, 2023.

SEC source: 0001020569-25-000170 · wk-form4_1754425596.xml · nonDerivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 58

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 18, 2023.

F4 · price: The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $95.512 to $96.470, inclusive. The Reporting Person undertakes to provide 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: 0001020569-25-000170 · wk-form4_1754425596.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,760

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 18, 2023.

F3 · price: The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $94.510 to $95.502, inclusive. The Reporting Person undertakes to provide 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).

SEC source: 0001020569-25-000170 · wk-form4_1754425596.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,096

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 18, 2023.

F2 · 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 $93.500 to $94.440, 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: 0001020569-25-000170 · wk-form4_1754425596.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,125

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 August 18, 2023.

SEC source: 0001020569-25-000168 · wk-form4_1754424997.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 85,081

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 20, 2025.

SEC source: 0001020569-25-000166 · wk-form4_1754424881.xml · nonDerivative · entry 1

McIntosh Greg W · CIK 0001769841 · EVP, CCO & GM, Global RM

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 18,107

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 21, 2025.

SEC source: 0001020569-25-000160 · wk-form4_1752009078.xml · derivative · entry 2

Samuels Theodore R. II · CIK 0001688276 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,116.5

Underlying: Common Stock · 347.908 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.

F4 · shares: These shares give effect to the Reporting Person's quarterly cash compensation for services on the board of directors of the Company as if reinvested in Phantom Shares.

F5 · price: The price reported in Column 8 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $100.539 to $100.624, inclusive. The Reporting Person undertakes to provide 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).

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: 0001020569-25-000156 · wk-form4_1752008834.xml · derivative · entry 2

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,369.762

Underlying: Common Stock · 347.908 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.

F4 · shares: These shares give effect to the Reporting Person's quarterly cash compensation for services on the board of directors of the Company as if reinvested in Phantom Shares.

F5 · price: The price reported in Column 8 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $100.539 to $100.624, inclusive. The Reporting Person undertakes to provide 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).

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: 0001020569-25-000158 · wk-form4_1752008930.xml · derivative · entry 1

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 990.554

Underlying: Common Stock · 7.673 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 "Plan"), the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") on various dates selected by the Reporting Person or as otherwise provided in the Plan. 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 $100.419 to $100.594, 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 "Plan"), the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") on various dates selected by the Reporting Person or as otherwise provided in the Plan. 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 "Plan"), the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") on various dates selected by the Reporting Person or as otherwise provided in the Plan. Each Phantom Share is the economic equivalent of one share of Common Stock.

SEC source: 0001020569-25-000160 · wk-form4_1752009078.xml · derivative · entry 1

Samuels Theodore R. II · CIK 0001688276 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,768.592

Underlying: Common Stock · 75.666 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 Common Stock were sold in multiple transactions at prices ranging from $100.419 to $100.594, 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: 0001020569-25-000156 · wk-form4_1752008834.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,021.854

Underlying: Common Stock · 340.987 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 Common Stock were sold in multiple transactions at prices ranging from $100.419 to $100.594, 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: 0001732058-25-000004 · wk-form4_1751490587.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 91,081

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2025.

SEC source: 0001566391-25-000004 · wk-form4_1751490827.xml · derivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 345,625

Underlying: Common Stock, par value $.01 per share · 69,125 shares

Expires 2026-02-18

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 August 18, 2023.

F6 · derivative.exercise_date: This stock option, representing a right to purchase a total of 829,506 shares, is fully vested.

SEC source: 0001566391-25-000004 · wk-form4_1751490827.xml · nonDerivative · entry 4

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 August 18, 2023.

F4 · price: The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $101.630 to $102.260, inclusive. The Reporting Person undertakes to provide 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: 0001566391-25-000004 · wk-form4_1751490827.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,624

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2023.

F3 · price: The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $100.630 to $101.620, inclusive. The Reporting Person undertakes to provide 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).

SEC source: 0001566391-25-000004 · wk-form4_1751490827.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,963

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2023.

F2 · 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 $99.630 to $100.620, 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: 0001566391-25-000004 · wk-form4_1751490827.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,125

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 August 18, 2023.

SEC source: 0001769841-25-000004 · wk-form4_1751490184.xml · nonDerivative · entry 1

McIntosh Greg W · CIK 0001769841 · EVP, CCO & GM, Global RM

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 35,446

F1 · kind: The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 21, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.000 to $100.040, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated 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: 0001020569-25-000154 · wk-form4_1751574198.xml · derivative · entry 4

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 90,860.989 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_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. The Reporting Person ceased service as a director effective May 29, 2025.

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. The Reporting Person ceased service as a director effective May 29, 2025.

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. The Reporting Person ceased service as a director effective May 29, 2025.

SEC source: 0001020569-25-000154 · wk-form4_1751574198.xml · nonDerivative · entry 1

BAILEY CLARK H · CIK 0001183331 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 242,454.989

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 · 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. The Reporting Person ceased service as a director effective May 29, 2025.

SEC source: 0001020569-25-000147 · wk-form4_1749166710.xml · nonDerivative · entry 1

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 36,515

SEC source: 0001020569-25-000141 · wk-form4_1748981184.xml · derivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 414,750

Underlying: Common Stock, par value $.01 per share · 69,125 shares

Expires 2026-02-18

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: This stock option, representing a right to purchase a total of 829,506 shares, is fully vested.

SEC source: 0001020569-25-000141 · wk-form4_1748981184.xml · nonDerivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

F3 · price: The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $98.880 to $99.465, inclusive. The Reporting Person undertakes to provide 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).

SEC source: 0001020569-25-000141 · wk-form4_1748981184.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 36,248

F2 · price: The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $97.880 to $98.877, inclusive. The Reporting Person undertakes to provide 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: 0001020569-25-000141 · wk-form4_1748981184.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 60,478

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 $96.863 to $97.859, 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 (1).

SEC source: 0001020569-25-000141 · wk-form4_1748981184.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,125

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: 0001020569-25-000139 · wk-form4_1748981051.xml · nonDerivative · entry 1

McIntosh Greg W · CIK 0001769841 · EVP, CCO & GM, Global RM

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 52,780

SEC source: 0001020569-25-000136 · wk-form4_1748896299.xml · derivative · entry 1

Simons Doyle · CIK 0001185922 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,680.867

Underlying: Common Stock · 2,249 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 "DDCP"), 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: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 29, 2025. The RSUs vest in their entirety on the grant date. The Reporting Person has elected that upon vesting of RSUs, receipt of the shares of Common Stock be deferred under the DDCP; accordingly, upon vesting, the Reporting Person instead receives an equal number of Phantom Shares.

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan (the "DDCP"), 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 "DDCP"), 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: 0001020569-25-000134 · wk-form4_1748896074.xml · derivative · entry 1

Samuels Theodore R. II · CIK 0001688276 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,692.926

Underlying: Common Stock · 2,249 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 "DDCP"), 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: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 29, 2025. The RSUs vest in their entirety on the grant date. The Reporting Person has elected that upon vesting of RSUs, receipt of the shares of Common Stock be deferred under the DDCP; accordingly, upon vesting, the Reporting Person will instead receive an equal number of Phantom Shares.

F1 · derivative.exercise_date: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan (the "DDCP"), 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 "DDCP"), 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: 0001020569-25-000132 · wk-form4_1748895757.xml · nonDerivative · entry 1

RAKOWICH WALTER C · CIK 0001202432 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,415

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 29, 2025. The RSUs vest in their entirety on the grant date.

SEC source: 0001020569-25-000130 · wk-form4_1748895669.xml · nonDerivative · entry 1

Matlock Robin · CIK 0001781215 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,551

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 29, 2025. The RSUs vest in their entirety on the grant date.

SEC source: 0001020569-25-000128 · wk-form4_1748895591.xml · nonDerivative · entry 1

FORD MONTE E · CIK 0001085361 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,925

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 29, 2025. The RSUs vest in their entirety on the grant date.

SEC source: 0001020569-25-000126 · wk-form4_1748895518.xml · nonDerivative · entry 1

Felix June Yee · CIK 0001609417 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,991

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 29, 2025. The RSUs vest in their entirety on the grant date.

SEC source: 0001020569-25-000124 · wk-form4_1748895419.xml · nonDerivative · entry 1

DAUTEN KENT P · CIK 0001049128 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,207,681

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 29, 2025. The RSUs vest in their entirety on the grant date.

SEC source: 0001020569-25-000122 · wk-form4_1748895343.xml · nonDerivative · entry 1

Arway Pamela M · CIK 0001464822 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,196

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 29, 2025. The RSUs vest in their entirety on the grant date.

SEC source: 0001020569-25-000120 · wk-form4_1748895212.xml · nonDerivative · entry 2

Allerton Jennifer · CIK 0001618762 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,541

SEC source: 0001020569-25-000120 · wk-form4_1748895212.xml · nonDerivative · entry 1

Allerton Jennifer · CIK 0001618762 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,744

F1 · shares: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 29, 2025. The RSUs vest in their entirety on the grant date.

SEC source: 0001020569-25-000117 · wk-form4_1748376090.xml · derivative · entry 4

McIntosh Greg W · CIK 0001769841 · EVP, CCO & GM, Global RM

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,744 shares

Expires 2026-03-09

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 was granted on March 9, 2019 and is fully vested.

SEC source: 0001020569-25-000117 · wk-form4_1748376090.xml · nonDerivative · entry 3

McIntosh Greg W · CIK 0001769841 · EVP, CCO & GM, Global RM

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 70,114