IRON MOUNTAIN INC (IRM) Institutional Ownership and Insiders Activity
IRON MOUNTAIN INC (IRM) is widely held by institutional investors, with 1149 firms reporting positions valued at approximately $31.65B based on SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is the largest disclosed holder, reporting approximately $4.24B in IRM holdings in its latest filing.
Recent insider activity includes 19 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.
Institutional Holders
1,149
Total Reported Value
$31.65B
Largest Holder
Blackrock, Inc.
Largest Position
$4.24B
Insider Transactions (90d)
19
Latest Filing Quarter
Q2 2026
New Institutional Positions
146
Funds Exiting Positions
91
Top Institutional Owners
View allInvestorReported Balance
- Blackrock, Inc.$4.24B
- Vanguard Portfolio Management Llc$3.23B
- Vanguard Capital Management Llc$2.39B
- State Street Corp$2.24B
- Cohen & Steers, Inc.$1.52B
IRM News
All news- Marble Harbor Investment Counsel LLC: Significant Portfolio Changes in Q2 2026
Aug 10, 2026 · valut.ai
- Foresight Capital Management Q2 Portfolio Shifts: Focus on ETF Buys & Sells
Jul 10, 2026 · valut.ai
Related IRM Institutional Insights:
- IRM 13F Institutional Holders
- IRM Superinvestors
- IRM Institutional Ownership Changes
- Real Estate Sector Institutional Ownership
- Real Estate Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Real Estate Stocks By Institutional Investors
- Most Sold Real Estate Stocks By Institutional Investors
- IRM Insider Trading & SEC Form 4 Activity
- IRM Articles
- Top Institutional Investor Stock Rankings