Company / Shares Outstanding
Iron Mountain Shares Outstanding History
FY2016-FY2025 · Annual data · Source: SEC filings
At a glance
Latest annual filing availableLatest Shares Outstanding
293.6M
FY2025
5-year range
288.3M / 293.6M
FY2021-FY2025
Trend
+0.5%
vs FY2024
Sector context
#26 of 140
Real Estate
What the data says
Iron Mountain's shares outstanding of 293592637.00 is higher than 81% of companies in the Real Estate sector (FY2025). Shares Outstanding has increased for 9 consecutive years, from 211340296.00 in FY2016 to 293592637.00 in FY2025.
Based on SEC 10-K filings.
293592637.00 in FY2025 with a 5-year CAGR of +0.4%. Top quartile in the Real Estate sector.
Remained stable around 293592637.00 over the past 2 years.
Real Estate sector context is included.
Shares Outstanding over time
Growth rates
- 3-Year CAGR
- +0.4%
- 5-Year CAGR
- +0.4%
- 10-Year CAGR
- -
Sector benchmark
+43.6% above sector average
Key checks
Key Insights
- Iron Mountain's shares outstanding has grown for 9 consecutive years.
- In FY2025, shares outstanding increased 0.5% year-over-year.
- Ranks #26 out of 140 companies in the Real Estate sector.
- Lowest shares outstanding in the period was in FY2016.
Company context
Key Data Points
- Altman Z-Score 0.46 (distress zone, below 1.8 threshold)
- High earnings quality (cash-backed earnings)
Data sourced from SEC EDGAR filings. Not investment advice.
Annual data
| Year | Shares OutstandingValue | YoY GrowthYoY |
|---|---|---|
| FY2025 | 293.6M | +0.5% |
| FY2024 | 292.1M | +0.5% |
| FY2023 | 290.8M | +0.4% |
| FY2022 | 289.8M | +0.5% |
| FY2021 | 288.3M | +0.3% |
| FY2020 | 287.3M | +0.3% |
| FY2019 | 286.3M | +1.1% |
| FY2018 | 283.1M | +7.4% |
| FY2017 | 263.7M | +24.8% |
| FY2016 | 211.3M | +0.7% |
As of FY2025 · SEC 10-K · Updated Jun 30, 2026