01—History
Shares Outstanding History
Year-over-year comparison from 10-K annual reports · Dashed line: constant growth FY2020–FY2025. Drag across the bars to change the range.
- 295.8M
02—Ledger
Shares Outstanding, period by period
| Period | Scale | Value | Change | Source |
|---|---|---|---|---|
| FY2025 | 295.8M | +0.7% | 10-K | |
| FY2024 | 293.6M | +0.5% | 10-K | |
| FY2023 | 292.1M | +0.5% | 10-K | |
| FY2022 | 290.8M | +0.4% | 10-K | |
| FY2021 | 289.8M | +0.5% | 10-K | |
| FY2020 | 288.3M | +0.3% | 10-K | |
| FY2019 | 287.3M | +0.3% | 10-K | |
| FY2018 | 286.3M | +1.1% | 10-K | |
| FY2017 | 283.1M | +7.4% | 10-K | |
| FY2016 | 263.7M | +24.8% | 10-K | |
| FY2015 | 211.3M | +0.7% | 10-K | |
| FY2014 | 209.8M | +9.6% | 10-K | |
| FY2013 | 191.4M | +0.7% | 10-K | |
| FY2012 | 190.0M | +10.4% | 10-K | |
| FY2011 | 172.1M | −14.0% | 10-K | |
| FY2010 | 200.1M | −1.7% | 10-K | |
| FY2009 | 203.5M | +0.8% | 10-K | |
| FY2008 | 201.9M | — | 10-K |
03—Questions
What is shares outstanding?
Shares outstanding is the total number of common shares currently held by all shareholders, including restricted shares.
What is Iron Mountain's current shares outstanding?
Iron Mountain (IRM) annual shares outstanding for 2025 was 295.8M, a 0.75% increase from 2024. Iron Mountain shares outstanding for the quarter ending June 30, 2026 was 297.7M.
What was Iron Mountain's shares outstanding in 2024?
Iron Mountain annual shares outstanding for 2024 was 293.6M, a 0.50% increase from 2023.
What was Iron Mountain's shares outstanding in 2023?
Iron Mountain annual shares outstanding for 2023 was 292.1M, a 0.45% increase from 2022.
What is Iron Mountain's 5-year shares outstanding CAGR?
Iron Mountain shares outstanding grew at a compound annual growth rate (CAGR) of 0.52% from FY2020 to FY2025, going from 288.3M to 295.8M over 5 years.
- Company
- Iron Mountain
- Ticker
- IRM
- Sector
- Financial Services
- Industry
- Real Estate Investment Trusts