Common Stock, Shares, Outstanding of IRON MOUNTAIN INC from 31 Mar 2010 to 31 Dec 2025

Taxonomy & unit
us-gaap: shares
Description
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.
Summary
IRON MOUNTAIN INC quarterly Common Stock, Shares, Outstanding in shares history and change rate from 31 Mar 2010 to 31 Dec 2025.
  • IRON MOUNTAIN INC Common Stock, Shares, Outstanding for the quarter ending 31 Dec 2025 was 295,788,645, a 0.75% increase year-over-year.
Source SEC data
View on sec.gov
Common Stock, Shares, Outstanding, Quarterly (shares)
Common Stock, Shares, Outstanding, YoY Quarterly Change (%)

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

Period Value YoY Chg Change % Date Report Filed Fiscal Year Fiscal Period
Q4 2025 295,788,645 +2,196,008 +0.75% 31 Dec 2025 10-K 12 Feb 2026 2025 FY
Q3 2025 295,504,799 +2,079,534 +0.71% 30 Sep 2025 10-Q 05 Nov 2025 2025 Q3
Q2 2025 295,271,945 +1,973,480 +0.67% 30 Jun 2025 10-Q 06 Aug 2025 2025 Q2
Q1 2025 294,968,740 +1,883,057 +0.64% 31 Mar 2025 10-Q 01 May 2025 2025 Q1
Q4 2024 293,592,637 +1,449,898 +0.5% 31 Dec 2024 10-K 12 Feb 2026 2025 FY
Q3 2024 293,425,265 +1,497,858 +0.51% 30 Sep 2024 10-Q 06 Nov 2024 2024 Q3
Q2 2024 293,298,465 +1,473,507 +0.5% 30 Jun 2024 10-Q 01 Aug 2024 2024 Q2
Q1 2024 293,085,683 +1,500,684 +0.52% 31 Mar 2024 10-Q 02 May 2024 2024 Q1
Q4 2023 292,142,739 +1,312,443 +0.45% 31 Dec 2023 10-K 14 Feb 2025 2024 FY
Q3 2023 291,927,407 +1,239,465 +0.43% 30 Sep 2023 10-Q 02 Nov 2023 2023 Q3
Q2 2023 291,824,958 +1,145,000 +0.39% 30 Jun 2023 10-Q 03 Aug 2023 2023 Q2
Q1 2023 291,584,999 +1,034,559 +0.36% 31 Mar 2023 10-Q 04 May 2023 2023 Q1
Q4 2022 290,830,296 +1,073,235 +0.37% 31 Dec 2022 10-K 22 Feb 2024 2023 FY
Q3 2022 290,687,942 +1,141,796 +0.39% 30 Sep 2022 10-Q 03 Nov 2022 2022 Q3
Q2 2022 290,679,958 +1,221,190 +0.42% 30 Jun 2022 10-Q 04 Aug 2022 2022 Q2
Q1 2022 290,550,440 +1,822,693 +0.63% 31 Mar 2022 8-K 04 Aug 2022
Q4 2021 289,757,061 +1,484,012 +0.52% 31 Dec 2021 10-K 23 Feb 2023 2022 FY
Q3 2021 289,546,146 +1,383,180 +0.48% 30 Sep 2021 10-Q 04 Nov 2021 2021 Q3
Q2 2021 289,458,768 +1,316,065 +0.46% 30 Jun 2021 10-Q 05 Aug 2021 2021 Q2
Q1 2021 288,727,747 +848,605 +0.3% 31 Mar 2021 10-Q 06 May 2021 2021 Q1
Q4 2020 288,273,049 +973,404 +0.34% 31 Dec 2020 8-K 04 Aug 2022
Q3 2020 288,162,966 +1,027,772 +0.36% 30 Sep 2020 10-Q 05 Nov 2020 2020 Q3
Q2 2020 288,142,703 +1,080,934 +0.38% 30 Jun 2020 10-Q 06 Aug 2020 2020 Q2
Q1 2020 287,879,142 +1,049,288 +0.37% 31 Mar 2020 10-Q 07 May 2020 2020 Q1
Q4 2019 287,299,645 +978,636 +0.34% 31 Dec 2019 10-K 24 Feb 2021 2020 FY
Q3 2019 287,135,194 +914,136 +0.32% 30 Sep 2019 10-Q 31 Oct 2019 2019 Q3
Q2 2019 287,061,769 +962,542 +0.34% 30 Jun 2019 10-Q 01 Aug 2019 2019 Q2
Q1 2019 286,829,854 +906,449 +0.32% 31 Mar 2019 10-Q 25 Apr 2019 2019 Q1
Q4 2018 286,321,009 +3,210,826 +1.1% 31 Dec 2018 10-K 13 Feb 2020 2019 FY
Q3 2018 286,221,058 +19,338,776 +7.2% 30 Sep 2018 10-Q 25 Oct 2018 2018 Q3
Q2 2018 286,099,227 +21,719,619 +8.2% 30 Jun 2018 10-Q 27 Jul 2018 2018 Q2
Q1 2018 285,923,405 +21,813,017 +8.3% 31 Mar 2018 10-Q 26 Apr 2018 2018 Q1
Q4 2017 283,110,183 +19,427,513 +7.4% 31 Dec 2017 10-K 14 Feb 2019 2018 FY
Q3 2017 266,882,282 +3,457,270 +1.3% 30 Sep 2017 10-Q 26 Oct 2017 2017 Q3
Q2 2017 264,379,608 +1,356,568 +0.52% 30 Jun 2017 10-Q 28 Jul 2017 2017 Q2
Q1 2017 264,110,388 +52,217,634 +25% 31 Mar 2017 10-Q 27 Apr 2017 2017 Q1
Q4 2016 263,682,670 +52,342,374 +25% 31 Dec 2016 10-K 16 Feb 2018 2017 FY
Q3 2016 263,425,012 +52,341,265 +25% 30 Sep 2016 10-Q 01 Nov 2016 2016 Q3
Q2 2016 263,023,040 +52,224,520 +25% 30 Jun 2016 10-Q 04 Aug 2016 2016 Q2
Q1 2016 211,892,754 +1,365,517 +0.65% 31 Mar 2016 10-Q 28 Apr 2016 2016 Q1
Q4 2015 211,340,296 +1,521,484 +0.72% 31 Dec 2015 10-K 23 Feb 2017 2016 FY
Q3 2015 211,083,747 +17,405,153 +9% 30 Sep 2015 10-Q 30 Oct 2015 2015 Q3
Q2 2015 210,798,520 +17,805,676 +9.2% 30 Jun 2015 10-Q 30 Jul 2015 2015 Q2
Q1 2015 210,527,237 +18,606,308 +9.7% 31 Mar 2015 10-Q 30 Apr 2015 2015 Q1
Q4 2014 209,818,812 +18,391,892 +9.6% 31 Dec 2014 10-K 26 Feb 2016 2015 FY
Q3 2014 193,678,594 +2,465,734 +1.3% 30 Sep 2014 10-Q 31 Oct 2014 2014 Q3
Q2 2014 192,992,844 +1,883,139 +0.98% 30 Jun 2014 10-Q 31 Jul 2014 2014 Q2
Q1 2014 191,920,929 +1,309,064 +0.69% 31 Mar 2014 10-Q 01 May 2014 2014 Q1
Q4 2013 191,426,920 +1,421,132 +0.75% 31 Dec 2013 8-K 07 May 2015
Q3 2013 191,212,860 +19,079,713 +11% 30 Sep 2013 10-Q 31 Oct 2013 2013 Q3
Q2 2013 191,109,705 +19,474,428 +11% 30 Jun 2013 10-Q 01 Aug 2013 2013 Q2
Q1 2013 190,611,865 +19,429,467 +11% 31 Mar 2013 10-Q 02 May 2013 2013 Q1
Q4 2012 190,005,788 +17,864,822 +10% 31 Dec 2012 8-K 05 May 2014 2013 FY
Q3 2012 172,133,147 -14,482,783 -7.8% 30 Sep 2012 10-Q 02 Nov 2012 2012 Q3
Q2 2012 171,635,277 -31,236,166 -15% 30 Jun 2012 10-Q 01 Aug 2012 2012 Q2
Q1 2012 171,182,398 -29,075,717 -15% 31 Mar 2012 10-Q 10 May 2012 2012 Q1
Q4 2011 172,140,966 -27,923,100 -14% 31 Dec 2011 10-K 01 Mar 2013 2012 FY
Q3 2011 186,615,930 -13,816,903 -6.9% 30 Sep 2011 10-Q 08 Nov 2011 2011 Q3
Q2 2011 202,871,443 +895,793 +0.44% 30 Jun 2011 10-Q 08 Aug 2011 2011 Q2
Q1 2011 200,258,115 -3,173,734 -1.6% 31 Mar 2011 8-K 19 Sep 2011 2011 Q1
Q4 2010 200,064,066 31 Dec 2010 10-K 28 Feb 2012 2011 FY
Q3 2010 200,432,833 30 Sep 2010 10-Q 08 Nov 2010 2010 Q3
Q2 2010 201,975,650 30 Jun 2010 10-Q 05 Aug 2010 2010 Q2
Q1 2010 203,431,849 31 Mar 2010 10-Q 10 May 2010 2010 Q1
* An asterisk sign (*) next to the value indicates that the value is likely invalid.