IRM Iron Mountain Incorporated
Iron Mountain Incorporated (IRM) Institutional Ownership
What the institutions did with IRM last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeOwnership map
Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Pensionfund PDN | 40.3K | 48.8% |
| Pensionfund Sabic | 19.8K | 24.0% |
| MassMutual Private Wealth & Trust, FSB | 7.3K | 8.8% |
| CX Institutional | 5.0K | 6.0% |
| PARK NATIONAL CORP /OH/ | 3.7K | 4.4% |
| Versant Capital Management, Inc | 2.5K | 3.0% |
| Coastline Trust Co | 1.6K | 2.0% |
| EASTERN BANK | 841 | 1.0% |
| Rosenberg Matthew Hamilton | 714 | 0.9% |
| Sarver Vrooman Wealth Advisors | 610 | 0.7% |
| Hickory Point Bank & Trust | 200 | 0.2% |
| GoalVest Advisory LLC | 52 | 0.1% |
| Planning Strategies Inc. | 25 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Pensionfund PDN | Reduced | 42.5K | 40.3K | -2.2K |
| Sarver Vrooman Wealth Advisors | New | 0 | 610 | +610 |
| CX Institutional | Reduced | 5.5K | 5.0K | -518 |
| Pensionfund Sabic | Reduced | 20.3K | 19.8K | -500 |
| Coastline Trust Co | Reduced | 1.9K | 1.6K | -216 |
| Hickory Point Bank & Trust | New | 0 | 200 | +200 |
| Versant Capital Management, Inc | Increased | 2.3K | 2.5K | +197 |
| MassMutual Private Wealth & Trust, FSB | Reduced | 7.4K | 7.3K | -170 |
| EASTERN BANK | Increased | 735 | 841 | +106 |
| Rosenberg Matthew Hamilton | Reduced | 788 | 714 | -74 |
| GoalVest Advisory LLC | New | 0 | 52 | +52 |
| Planning Strategies Inc. | Increased | 24 | 25 | +1 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.