IRON MOUNTAIN INC (IRM) - Dilution Analysis

Visualizing historical and potential share dilution over time

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Dilution Analysis

Low Risk

Limited dilution potential

Last updated: April 30, 2026

Risk Assessment Details

Potential Dilution: 0.0% of current shares

Recent Dilution: 1.27% (2 years)

Historical Dilution Factor: minimal recent dilution

Outstanding Shares

300M

Potential Supply

Additional shares possible

Splits

None

Past 2 years

Summary

IRM currently has 297M outstanding shares. with minimal authorized share overhang for future dilution. The company has minimally diluted shareholders by 1.27% over the past 2 years.

Share Structure Timeline

Outstanding Shares

Total Supply

Historical Data Points

Date	Event	Outstanding
Apr 30, 2026	10-Q filing \| 296.8M shares outstanding	300M
Aug 06, 2025	10-Q filing \| 295.4M shares outstanding	300M
May 01, 2025	10-Q filing \| 294.5M shares outstanding	290M
Feb 14, 2025	10-K filing \| 293.4M shares outstanding	290M
Nov 06, 2024	10-Q filing \| 293.6M shares outstanding	290M
Aug 01, 2024	10-Q filing \| 293.3M shares outstanding	290M
May 02, 2024	10-Q filing \| 292.7M shares outstanding	290M
Feb 22, 2024	10-K filing \| 291.9M shares outstanding	290M
Nov 02, 2023	10-Q filing \| 292.1M shares outstanding	290M
Aug 03, 2023	10-Q filing \| 291.8M shares outstanding	290M
May 04, 2023	10-Q filing \| 291.4M shares outstanding	290M
Feb 23, 2023	10-K filing \| 290.8M shares outstanding	290M
Nov 03, 2022	10-Q filing \| 290.9M shares outstanding	290M
Aug 04, 2022	10-Q filing \| 290.8M shares outstanding	290M
Apr 28, 2022	10-Q filing \| 290.3M shares outstanding	290M
Feb 24, 2022	10-K filing \| 289.5M shares outstanding	290M
Nov 04, 2021	10-Q filing \| 289.8M shares outstanding	290M
Aug 05, 2021	10-Q filing \| 289.2M shares outstanding	290M
May 06, 2021	10-Q filing \| 288.8M shares outstanding	290M
Feb 24, 2021	10-K filing \| 288.6M shares outstanding	290M
Nov 05, 2020	10-Q filing \| 288.4M shares outstanding	290M
Aug 06, 2020	10-Q filing \| 288.1M shares outstanding	290M
May 07, 2020	10-Q filing \| 287.8M shares outstanding	290M
Feb 13, 2020	10-K filing \| 287.0M shares outstanding	290M

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