Iron MountainIRM
13F holders, Q1 2026 (March 31)2holders +1
1new positions
0sold out
$32.28avg. 13F price*
At the end of Q1 2026, 2 institutions reported holding Iron Mountain Inc (IRM) in their 13F filings, up 1 from Q4 2025. 1 opened new positions and 0 sold out. The largest holders were Kentucky Retirement Systems ($426K) and Byrne Asset Management LLC ($40K).
- Company
- Iron Mountain Inc
- Filed as
- IRON MTN INC (Q1 2026)
- CUSIP
- 462846106
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 1 | $426K |
| Exits | 0 | $0 |
All 13F filers, Q4 2025 → Q1 2026: 14,051 shares bought and 5 shares sold, net +14,046 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 2 holders
| Kentucky Retirement Systems | 0.03% | New | 14,051 | $426K |
| Byrne Asset Management LLC | 0.02% | Reduce -1.3% | 395 | $40K |
"% of holder's portfolio" is IRM's weight in each manager's 13F, not the share of Iron Mountain Inc the manager owns.