← All companies
IRON MOUNTAIN INC
IRM - Company ID 0001020569
Market cap$34.77 B
Rank#427
Filings2,724
Market capitalization of IRON MOUNTAIN INC
As of 2026-09-08, IRON MOUNTAIN INC (IRM) has a market capitalization of $34.77 B, making it the #427 most valuable US-listed company.
Recent market cap readings
| Date | Market cap |
|---|---|
| 2026-09-08 | $34.77 B |
| 2026-09-07 | $34.77 B |
| 2026-09-06 | $34.77 B |
| 2026-09-05 | $34.77 B |
| 2026-09-04 | $34.57 B |
| 2026-09-03 | $34.21 B |
| 2026-09-02 | $33.39 B |
| 2026-09-01 | $33.98 B |
| 2026-08-31 | $34.18 B |
| 2026-08-30 | $34.93 B |
| 2026-08-29 | $34.93 B |
| 2026-08-28 | $34.93 B |
Market Cap of similar companies
Frequently asked questions
What is IRON MOUNTAIN INC's market cap?
As of 2026-09-08, IRON MOUNTAIN INC (IRM) has a market capitalization of $34.77 B, making it the #427 most valuable US-listed company.
Where does IRON MOUNTAIN INC rank by market cap?
IRON MOUNTAIN INC is the #427 largest US-listed company by market capitalization.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.