Iron Mountain Incorporated
IRMLast close · Oct 16, 2026112.51−0.17 (−0.15%)
Market cap$33.5B
None of the 85 managers this site tracks held Iron Mountain (IRM) in their latest 13F. No Schedule 13D or 13G is on file for IRM from the activists and large holders the site follows.
No 13D/13G filings on record and no tracked superinvestor holds IRM.
13D/13G are SEC beneficial-ownership disclosures, triggered only above 5%; a 13F is a quarterly snapshot filed up to 45 days after quarter end. Superinvestor names link to their full portfolios under Investors.