Entity Common Stock, Shares Outstanding of IRON MOUNTAIN INC from 26 Apr 2010 to 06 Feb 2026

Taxonomy & unit
dei: shares
Description
Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.
Summary
IRON MOUNTAIN INC quarterly Entity Common Stock, Shares Outstanding in shares history and change rate from 26 Apr 2010 to 06 Feb 2026.
  • IRON MOUNTAIN INC Entity Common Stock, Shares Outstanding for the quarter ending 06 Feb 2026 was 295,835,206, a 0.71% increase year-over-year.
Source SEC data
View on sec.gov
Entity Common Stock, Shares Outstanding, Quarterly (shares)
Entity Common Stock, Shares Outstanding, YoY Quarterly Change (%)

IRON MOUNTAIN INC Quarterly Entity Common Stock, Shares Outstanding (shares)

Period Value YoY Chg Change % Date Report Filed Fiscal Year Fiscal Period
Q4 2025 295,835,206 +2,094,301 +0.71% 06 Feb 2026 10-K 12 Feb 2026 2025 FY
Q3 2025 295,589,491 +2,129,120 +0.73% 31 Oct 2025 10-Q 05 Nov 2025 2025 Q3
Q2 2025 295,348,225 +2,012,399 +0.69% 01 Aug 2025 10-Q 06 Aug 2025 2025 Q2
Q1 2025 295,043,896 +1,910,575 +0.65% 25 Apr 2025 10-Q 01 May 2025 2025 Q1
Q4 2024 293,740,905 07 Feb 2025 10-K 14 Feb 2025 2024 FY
Q3 2024 293,460,371 +1,470,803 +0.5% 01 Nov 2024 10-Q 06 Nov 2024 2024 Q3
Q2 2024 293,335,826 +1,483,417 +0.51% 26 Jul 2024 10-Q 01 Aug 2024 2024 Q2
Q1 2024 293,133,321 +1,510,051 +0.52% 26 Apr 2024 10-Q 02 May 2024 2024 Q1
Q3 2023 291,989,568 +1,275,531 +0.44% 27 Oct 2023 10-Q 02 Nov 2023 2023 Q3
Q2 2023 291,852,409 +1,167,483 +0.4% 28 Jul 2023 10-Q 03 Aug 2023 2023 Q2
Q1 2023 291,623,270 +1,061,732 +0.36% 28 Apr 2023 10-Q 04 May 2023 2023 Q1
Q3 2022 290,714,037 +1,164,539 +0.4% 28 Oct 2022 10-Q 03 Nov 2022 2022 Q3
Q2 2022 290,684,926 +1,224,612 +0.42% 29 Jul 2022 10-Q 04 Aug 2022 2022 Q2
Q1 2022 290,561,538 +1,830,447 +0.63% 22 Apr 2022 10-Q 28 Apr 2022 2022 Q1
Q3 2021 289,549,498 +1,378,153 +0.48% 29 Oct 2021 10-Q 04 Nov 2021 2021 Q3
Q2 2021 289,460,314 +1,311,995 +0.46% 30 Jul 2021 10-Q 05 Aug 2021 2021 Q2
Q1 2021 288,731,091 +848,238 +0.3% 30 Apr 2021 10-Q 06 May 2021 2021 Q1
Q3 2020 288,171,345 +1,027,939 +0.36% 30 Oct 2020 10-Q 05 Nov 2020 2020 Q3
Q2 2020 288,148,319 +1,041,508 +0.36% 31 Jul 2020 10-Q 06 Aug 2020 2020 Q2
Q1 2020 287,882,853 +1,002,212 +0.35% 01 May 2020 10-Q 07 May 2020 2020 Q1
Q4 2019 287,343,251 +977,556 +0.34% 07 Feb 2020 10-K 13 Feb 2020 2019 FY
Q3 2019 287,143,406 +923,812 +0.32% 25 Oct 2019 10-Q 31 Oct 2019 2019 Q3
Q2 2019 287,106,811 +961,028 +0.34% 26 Jul 2019 10-Q 01 Aug 2019 2019 Q2
Q1 2019 286,880,641 +956,696 +0.34% 19 Apr 2019 10-Q 25 Apr 2019 2019 Q1
Q4 2018 286,365,695 +1,054,146 +0.37% 08 Feb 2019 10-K 14 Feb 2019 2018 FY
Q3 2018 286,219,594 +19,282,500 +7.2% 19 Oct 2018 10-Q 25 Oct 2018 2018 Q3
Q2 2018 286,145,783 +21,755,081 +8.2% 20 Jul 2018 10-Q 27 Jul 2018 2018 Q2
Q1 2018 285,923,945 +21,807,423 +8.3% 20 Apr 2018 10-Q 26 Apr 2018 2018 Q1
Q4 2017 285,311,549 09 Feb 2018 10-K 16 Feb 2018 2017 FY
Q3 2017 266,937,094 +3,489,254 +1.3% 20 Oct 2017 10-Q 26 Oct 2017 2017 Q3
Q2 2017 264,390,702 +1,142,059 +0.43% 21 Jul 2017 10-Q 28 Jul 2017 2017 Q2
Q1 2017 264,116,522 +52,164,374 +25% 21 Apr 2017 10-Q 27 Apr 2017 2017 Q1
Q3 2016 263,447,840 +52,294,917 +25% 28 Oct 2016 10-Q 01 Nov 2016 2016 Q3
Q2 2016 263,248,643 +52,422,949 +25% 29 Jul 2016 10-Q 04 Aug 2016 2016 Q2
Q1 2016 211,952,148 +1,396,787 +0.66% 22 Apr 2016 10-Q 28 Apr 2016 2016 Q1
Q3 2015 211,152,923 +17,448,696 +9% 23 Oct 2015 10-Q 30 Oct 2015 2015 Q3
Q2 2015 210,825,694 +17,711,311 +9.2% 24 Jul 2015 10-Q 30 Jul 2015 2015 Q2
Q1 2015 210,555,361 +18,599,578 +9.7% 24 Apr 2015 10-Q 30 Apr 2015 2015 Q1
Q3 2014 193,704,227 +2,486,310 +1.3% 24 Oct 2014 10-Q 31 Oct 2014 2014 Q3
Q2 2014 193,114,383 +2,004,474 +1% 25 Jul 2014 10-Q 31 Jul 2014 2014 Q2
Q1 2014 191,955,783 +1,288,963 +0.68% 25 Apr 2014 10-Q 01 May 2014 2014 Q1
Q4 2013 191,504,318 +1,364,310 +0.72% 07 Feb 2014 10-K 28 Feb 2014 2013 FY
Q3 2013 191,217,917 +18,702,900 +11% 25 Oct 2013 10-Q 31 Oct 2013 2013 Q3
Q2 2013 191,109,909 +19,470,686 +11% 26 Jul 2013 10-Q 01 Aug 2013 2013 Q2
Q1 2013 190,666,820 +19,467,207 +11% 26 Apr 2013 10-Q 02 May 2013 2013 Q1
Q4 2012 190,140,008 +19,052,719 +11% 08 Feb 2013 10-K 01 Mar 2013 2012 FY
Q3 2012 172,515,017 -13,102,662 -7.1% 23 Oct 2012 10-Q 02 Nov 2012 2012 Q3
Q2 2012 171,639,223 -31,505,789 -16% 23 Jul 2012 10-Q 01 Aug 2012 2012 Q2
Q1 2012 171,199,613 -29,490,138 -15% 23 Apr 2012 10-Q 10 May 2012 2012 Q1
Q4 2011 171,087,289 -29,107,364 -15% 10 Feb 2012 10-K 28 Feb 2012 2011 FY
Q3 2011 185,617,679 -14,511,550 -7.3% 24 Oct 2011 10-Q 08 Nov 2011 2011 Q3
Q2 2011 203,145,012 +1,633,701 +0.81% 25 Jul 2011 10-Q 08 Aug 2011 2011 Q2
Q1 2011 200,689,751 -2,607,763 -1.3% 25 Apr 2011 10-Q 05 May 2011 2011 Q1
Q4 2010 200,194,653 10 Feb 2011 10-K 01 Mar 2011 2010 FY
Q3 2010 200,129,229 25 Oct 2010 10-Q 08 Nov 2010 2010 Q3
Q2 2010 201,511,311 26 Jul 2010 10-Q 05 Aug 2010 2010 Q2
Q1 2010 203,297,514 26 Apr 2010 10-Q 10 May 2010 2010 Q1
* An asterisk sign (*) next to the value indicates that the value is likely invalid.