NYSE:IRM | Shares Outstanding | IRON MOUNTAIN INC

Complete source-backed shares outstanding history.

Available history
2008-12-31 to 2026-07-24
Data captured

Historical Shares Outstanding

DateShares outstanding
2026-07-24297,702,812
2026-06-30297,662,013
2026-04-24297,524,681
2026-03-31297,478,818
2026-02-06295,835,206
2025-12-31295,788,645
2025-10-31295,589,491
2025-09-30295,504,799
2025-08-01295,348,225
2025-06-30295,271,945
2025-04-25295,043,896
2025-03-31294,968,740
2025-02-07293,740,905
2024-12-31293,592,637
2024-11-01293,460,371
2024-09-30293,425,265
2024-07-26293,335,826
2024-06-30293,298,465
2024-04-26293,133,321
2024-03-31293,085,683
2024-02-16292,275,668
2023-12-31292,142,739
2023-10-27291,989,568
2023-09-30291,927,407
2023-07-28291,852,409
2023-06-30291,824,958
2023-04-28291,623,270
2023-03-31291,584,999
2023-02-17290,896,121
2022-12-31290,830,296
2022-10-28290,714,037
2022-09-30290,687,942
2022-07-29290,684,926
2022-06-30290,679,958
2022-04-22290,561,538
2022-03-31290,550,440
2022-02-18289,830,119
2021-12-31289,757,061
2021-10-29289,549,498
2021-09-30289,546,146
2021-07-30289,460,314
2021-06-30289,458,768
2021-04-30288,731,091
2021-03-31288,727,747
2021-02-19288,421,215
2020-12-31288,273,049
2020-10-30288,171,345
2020-09-30288,162,966
2020-07-31288,148,319
2020-06-30288,142,703
2020-05-01287,882,853
2020-03-31287,879,142
2020-02-07287,343,251
2019-12-31287,299,645
2019-10-25287,143,406
2019-09-30287,135,194
2019-07-26287,106,811
2019-06-30287,061,769
2019-04-19286,880,641
2019-03-31286,829,854
2019-02-08286,365,695
2018-12-31286,321,009
2018-10-19286,219,594
2018-09-30286,221,058
2018-07-20286,145,783
2018-06-30286,099,227
2018-04-20285,923,945
2018-03-31285,923,405
2018-02-09285,311,549
2017-12-31283,110,183
2017-10-20266,937,094
2017-09-30266,882,282
2017-07-21264,390,702
2017-06-30264,379,608
2017-04-21264,116,522
2017-03-31264,110,388
2017-02-17263,724,213
2016-12-31263,682,670
2016-10-28263,447,840
2016-09-30263,425,012
2016-07-29263,248,643
2016-06-30263,023,040
2016-04-22211,952,148
2016-03-31211,892,754
2016-02-19211,508,202
2015-12-31211,340,296
2015-10-23211,152,923
2015-09-30211,083,747
2015-07-24210,825,694
2015-06-30210,798,520
2015-04-24210,555,361
2015-03-31210,527,237
2015-02-20210,071,985
2014-12-31209,818,812
2014-10-24193,704,227
2014-09-30193,678,594
2014-07-25193,114,383
2014-06-30192,992,844
2014-04-25191,955,783
2014-03-31191,920,929