IRON MOUNTAIN INC (IRM) Insider Transactions

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $120.56 to $121.55, 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).

F3 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated Common Stock were sold in multiple transactions at prices ranging from $121.56 to $122.56, 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).

F4 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated Common Stock were sold in multiple transactions at prices ranging from $122.60 to $123.12, 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).

F5 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F6 Not applicable.

References: F1, F6, F5

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $120.56 to $121.55, 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).

F3 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated Common Stock were sold in multiple transactions at prices ranging from $121.56 to $122.56, 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).

F4 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated Common Stock were sold in multiple transactions at prices ranging from $122.60 to $123.12, 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).

F5 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F6 Not applicable.

References: F1, F4

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $120.56 to $121.55, 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).

F3 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated Common Stock were sold in multiple transactions at prices ranging from $121.56 to $122.56, 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).

F4 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated Common Stock were sold in multiple transactions at prices ranging from $122.60 to $123.12, 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).

F5 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F6 Not applicable.

References: F1, F3

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $120.56 to $121.55, 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).

F3 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated Common Stock were sold in multiple transactions at prices ranging from $121.56 to $122.56, 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).

F4 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated Common Stock were sold in multiple transactions at prices ranging from $122.60 to $123.12, 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).

F5 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F6 Not applicable.

References: F1, F2

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $120.56 to $121.55, 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).

F3 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated Common Stock were sold in multiple transactions at prices ranging from $121.56 to $122.56, 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).

F4 The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated Common Stock were sold in multiple transactions at prices ranging from $122.60 to $123.12, 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).

F5 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F6 Not applicable.

References: F1

Reported filing row; may be amended. Do not sum filings blindly.

F1 The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 8, 2026.

F2 This stock option, representing a right to purchase a total of 6,839 shares, is fully vested.

F3 Not applicable.

References: F1, F3, F2

Reported filing row; may be amended. Do not sum filings blindly.

F1 The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 8, 2026.

F2 This stock option, representing a right to purchase a total of 6,839 shares, is fully vested.

F3 Not applicable.

References: F1

Reported filing row; may be amended. Do not sum filings blindly.

F1 The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 8, 2026.

F2 This stock option, representing a right to purchase a total of 6,839 shares, is fully vested.

F3 Not applicable.

References: F1

Reported filing row; may be amended. Do not sum filings blindly.

F1 The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 8, 2026.

F2 This stock option, representing a right to purchase a total of 6,839 shares, is fully vested.

F3 Not applicable.

References: F1

Reported filing row; may be amended. Do not sum filings blindly.

F1 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 These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

References: F1, F2

Reported filing row; may be amended. Do not sum filings blindly.

F1 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 These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

References: F1, F2

Reported filing row; may be amended. Do not sum filings blindly.

F1 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 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.

References: F1, F2

Reported filing row; may be amended. Do not sum filings blindly.

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

References: F1

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $121.40 to $122.39, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $122.40 to 123.39, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $123.40 to 124.38, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $124.44 to $125.38, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $125.51 to $126.43, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1, F8, F7

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $121.40 to $122.39, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $122.40 to 123.39, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $123.40 to 124.38, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $124.44 to $125.38, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $125.51 to $126.43, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1, F6

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $121.40 to $122.39, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $122.40 to 123.39, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $123.40 to 124.38, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $124.44 to $125.38, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $125.51 to $126.43, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1, F5

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $121.40 to $122.39, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $122.40 to 123.39, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $123.40 to 124.38, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $124.44 to $125.38, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $125.51 to $126.43, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1, F4

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $121.40 to $122.39, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $122.40 to 123.39, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $123.40 to 124.38, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $124.44 to $125.38, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $125.51 to $126.43, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1, F3

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $121.40 to $122.39, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $122.40 to 123.39, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $123.40 to 124.38, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $124.44 to $125.38, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $125.51 to $126.43, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1, F2

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $121.40 to $122.39, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $122.40 to 123.39, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $123.40 to 124.38, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $124.44 to $125.38, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $125.51 to $126.43, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1

Reported filing row; may be amended. Do not sum filings blindly.

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

References: F1

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $125.49 to $126.48, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $126.50 to $127.48, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $127.50 to $128.48, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $128.55 to $129.54, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $129.55 to $129.78, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1, F8, F7

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $125.49 to $126.48, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $126.50 to $127.48, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $127.50 to $128.48, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $128.55 to $129.54, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $129.55 to $129.78, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1, F6

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $125.49 to $126.48, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $126.50 to $127.48, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $127.50 to $128.48, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $128.55 to $129.54, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $129.55 to $129.78, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1, F5

Reported filing row; may be amended. Do not sum filings blindly.

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

F2 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 $125.49 to $126.48, 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).

F3 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $126.50 to $127.48, 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).

F4 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $127.50 to $128.48, 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).

F5 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $128.55 to $129.54, 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).

F6 The price reported in Column 4 is a weighted average price. These Common Stock were sold in multiple transactions at prices ranging from $129.55 to $129.78, 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 (6).

F7 This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested.

F8 Not applicable.

References: F1, F4