Iron Mountain Inc (IRM): Shares Outstanding

Annual figures by period end, from SEC filings.

295.79M
As of 2025-12-31
297.66M
As of 2026-06-30
+0.6%
3-year compound annual growth
+0.5%
5-year compound annual growth
+3.4%
10-year compound annual growth
2009-12-31: 203.55M2010-12-31: 200.06M2011-12-31: 172.14M2012-12-31: 190.01M2013-12-31: 191.43M2014-12-31: 209.82M2015-12-31: 211.34M2016-12-31: 263.68M2017-12-31: 283.11M2018-12-31: 286.32M2019-12-31: 287.30M2020-12-31: 288.27M2021-12-31: 289.76M2022-12-31: 290.83M2023-12-31: 292.14M2024-12-31: 293.59M2025-12-31: 295.79M295.79M
2009-12-31 Shares Outstanding (shares) 2025-12-31
Period endedShares OutstandingChange YoYSource filing
2025-12-31295.79M+0.7%2026-02-12, Balance as of period end
2024-12-31293.59M+0.5%2026-02-12, Balance as of period end
2023-12-31292.14M+0.5%2025-02-14, Balance as of period end
2022-12-31290.83M+0.4%2024-02-22, Balance as of period end
2021-12-31289.76M+0.5%2023-02-23, Balance as of period end
2020-12-31288.27M+0.3%2022-02-24, Balance as of period end
2019-12-31287.30M+0.3%2021-02-24, Balance as of period end
2018-12-31286.32M+1.1%2020-02-13, Balance as of period end
2017-12-31283.11M+7.4%2019-02-14, Balance as of period end
2016-12-31263.68M+24.8%2018-02-16, Balance as of period end
2015-12-31211.34M+0.7%2017-02-23, Balance as of period end
2014-12-31209.82M+9.6%2016-02-26, Balance as of period end
2013-12-31191.43M+0.7%2015-02-27, Balance as of period end
2012-12-31190.01M+10.4%2014-02-28, Balance as of period end
2011-12-31172.14M-14.0%2013-03-01, Balance as of period end
2010-12-31200.06M-1.7%2012-02-28, Balance as of period end
2009-12-31203.55Mn/a2011-03-01, Balance as of period end