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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)."}],"balance_after":223085,"source":{"system":"sec-edgar","filing":"0001566391-26-000010","document":"wk-form4_1772745163.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000010/wk-form4_1772745163.xml","form_type":"4"}},{"id":859487,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-05T21:12:46.000Z","date":"2026-03-03","kind":"sale","planned":true,"acquired":false,"shares":18360,"price":106.33,"value":1952218.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"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 $105.82 to $106.81, 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)."}],"balance_after":254025,"source":{"system":"sec-edgar","filing":"0001566391-26-000010","document":"wk-form4_1772745163.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000010/wk-form4_1772745163.xml","form_type":"4"}},{"id":859486,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-05T21:12:46.000Z","date":"2026-03-03","kind":"sale","planned":true,"acquired":false,"shares":23590,"price":105.25,"value":2482847.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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 $104.82 to $105.80, 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)."}],"balance_after":272385,"source":{"system":"sec-edgar","filing":"0001566391-26-000010","document":"wk-form4_1772745163.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000010/wk-form4_1772745163.xml","form_type":"4"}},{"id":870289,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-02","kind":"exercise","planned":true,"acquired":false,"shares":38474,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F16","text":"Not applicable."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F17","text":"This stock option, initially representing a right to purchase a total of 461,696 shares, is fully vested."}],"balance_after":346266,"derivative":{"exercise_price":37,"expiration_date":"2027-02-16","underlying":"Common Stock, par value $.01 per share","underlying_shares":38474},"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870288,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-01","kind":"grant","planned":true,"acquired":true,"shares":74069,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F16","text":"Not applicable."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F15","text":"This stock option becomes exercisable in three substantially equal annual installments beginning on the first anniversary of the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F15","text":"This stock option becomes exercisable in three substantially equal annual installments beginning on the first anniversary of the date of grant."}],"balance_after":74069,"derivative":{"exercise_price":108.33,"underlying":"Common Stock, par value $.01 per share","underlying_shares":74069},"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870287,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Performance Units","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-01","kind":"exercise","planned":true,"acquired":false,"shares":650674,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F13","text":"Each PU represents a contingent right to receive one share of Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F14","text":"The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after\ncompletion of the relevant performance period, and the PUs fully vested on March 1, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F14","text":"The PUs were initially granted to the Reporting Person on March 1, 2023. 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These shares of Common Stock were sold in multiple transactions at prices ranging from $110.40 to $110.81, 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 (12)."}],"balance_after":295975,"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870285,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":18117,"price":110.02,"value":1993232.34,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"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 $109.40 to $110.40, 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 (11)."}],"balance_after":297799,"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870284,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":16457,"price":108.91,"value":1792331.87,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"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 $108.39 to $109.36, 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 (10)."}],"balance_after":315916,"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870283,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":2076,"price":107.95,"value":224104.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"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 $107.35 to $108.35, 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 (9)."}],"balance_after":332373,"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870282,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-02","kind":"exercise","planned":true,"acquired":true,"shares":38474,"price":37,"value":1423538.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."}],"balance_after":334449,"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870281,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":3200,"price":110.74,"value":354368.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"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 $110.70 to $110.79, 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 (8)."}],"balance_after":295975,"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870280,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":41456,"price":110.05,"value":4562232.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"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 $109.68 to $110.58, 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 (7)."}],"balance_after":299175,"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870279,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":37296,"price":109.07,"value":4067874.72,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"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 $108.67 to $109.66, 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)."}],"balance_after":340631,"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870278,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":13778,"price":108.27,"value":1491744.06,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"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 $107.67 to $108.66, 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)."}],"balance_after":377927,"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}},{"id":870277,"issuer":{"id":517,"kind":"organization","name":"IRON MOUNTAIN INC","symbol":"IRM"},"owners":[{"id":575,"kind":"person","name":"Meaney William L","position":1,"cik":"0001566391","reported_name":"Meaney William L","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01 per share","published_at":"2026-03-04T00:31:35.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":2929,"price":107.16,"value":313871.64,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares of the Company common stock (\"Common Stock\") were sold in multiple transactions at prices ranging from $106.65 to $107.64, 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)."}],"balance_after":391705,"source":{"system":"sec-edgar","filing":"0001566391-26-000008","document":"wk-form4_1772584292.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1020569/000156639126000008/wk-form4_1772584292.xml","form_type":"4"}}],"next_cursor":"2026-03-04T00:31:35.000000Z,870277"}