Iron Mountain Shares Outstanding 2012-2026 | IRM

Iron Mountain shares outstanding history from 2012 to 2026. Shares outstanding can be defined as the number of shares held by shareholders (including insiders) assuming conversion of all convertible debt, securities, warrants and options. This metric excludes the company's treasury shares.
  • Iron Mountain shares outstanding for the quarter ending March 31, 2026 were 0.299B, a 0.53% increase year-over-year.
  • Iron Mountain 2025 shares outstanding were 0.298B, a 0.53% increase from 2024.
  • Iron Mountain 2024 shares outstanding were 0.296B, a 0.77% increase from 2023.
  • Iron Mountain 2023 shares outstanding were 0.294B, a 0.52% increase from 2022.
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Iron Mountain Annual Shares Outstanding
(Millions of Shares)
2025 298
2024 296
2023 294
2022 292
2021 291
2020 289
2019 288
2018 287
2017 267
2016 247
2015 212
2014 197
2013 192
2012 175
2011 196
Iron Mountain Quarterly Shares Outstanding
(Millions of Shares)
2026-03-31 299
2025-12-31 298
2025-09-30 298
2025-06-30 295
2025-03-31 297
2024-12-31 296
2024-09-30 294
2024-06-30 296
2024-03-31 295
2023-12-31 294
2023-09-30 294
2023-06-30 294
2023-03-31 293
2022-12-31 292
2022-09-30 293
2022-06-30 292
2022-03-31 292
2021-12-31 291
2021-09-30 291
2021-06-30 291
2021-03-31 290
2020-12-31 289
2020-09-30 289
2020-06-30 288
2020-03-31 288
2019-12-31 288
2019-09-30 288
2019-06-30 287
2019-03-31 287
2018-12-31 287
2018-09-30 287
2018-06-30 287
2018-03-31 286
2017-12-31 267
2017-09-30 266
2017-06-30 265
2017-03-31 265
2016-12-31 247
2016-09-30 265
2016-06-30 246
2016-03-31 212
2015-12-31 212
2015-09-30 212
2015-06-30 212
2015-03-31 212
2014-12-31 197
2014-09-30 195
2014-06-30 194
2014-03-31 193
2013-12-31 192
2013-09-30 192
2013-06-30 193
2013-03-31 192
2012-12-31 175
2012-09-30 173
2012-06-30 172
2012-03-31 172
2011-12-31 196
2011-09-30 197
2011-06-30 203
Sector Industry Market Cap Revenue
Business Services Business Information Services $32.535B $6.902B
Iron Mountain Inc. is the global leader for storage and information management solutions. It stores records and data backup media, and provide information management services that help global organizations protect their information, lower storage rental costs, comply with regulations, enable corporate disaster recovery, and better use their information for business advantages, regardless of its format, location or lifecycle stage. It offers comprehensive records and information management & data management services, with the expertise and experience to address complex storage and information management challenges such as rising storage rental costs, and increased litigation, regulatory compliance and disaster recovery requirements. It has 3 segments: Global Records and Information Management (RIM) Business consisting of records management, data management, global digital solutions, secure shredding, secure IT asset disposition and consumer storage, Global Data Center Business and Corporate and Other Business.
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