Iron Mountain Inc
IRM- Exchange
- NYSE
- Industry
- Real Estate Investment Trusts
- SEC CIK
- 0001020569
In the last 90 days, Iron Mountain Inc insiders filed 0 open-market purchases and 6 sales; 1,173 institutions reported holding it in 13F filings for Q2 2026, worth $32.4B in total; no superinvestor holds it.
13F holders, Q2 2025
Institutional positions in Iron Mountain Inc as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 1,045
- +59 vs. Q1 2025
- Shares held
- 248.8M
- +4.03M (+1.6%) vs. Q1 2025
- Total value
- $25.5B
- +$4.48B (+21.3%) vs. Q1 2025
- New holders
- 121
- 391 more added
- Sold out
- 62
- 356 more reduced
9 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting IRM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 1,173 | $32.4B |
| Q1 2026 | 1,090 | $25.9B |
| Q4 2025 | 1,011 | $21.4B |
| Q3 2025 | 1,017 | $25.5B |
| Q2 2025 | 1,045 | $25.5B |
| Q1 2025 | 995 | $21.1B |
| Q4 2024 | 1,067 | $24.9B |
| Q3 2024 | 1,056 | $28.8B |
| Q2 2024 | 967 | $22.2B |
| Q1 2024 | 938 | $19.0B |
| Q4 2023 | 891 | $16.4B |
| Q3 2023 | 831 | $13.7B |
| Q2 2023 | 817 | $12.9B |
| Q1 2023 | 790 | $12.0B |
| Q4 2022 | 782 | $11.4B |
| Q3 2022 | 743 | $10.0B |
| Q2 2022 | 767 | $10.9B |
| Q1 2022 | 777 | $12.4B |
| Q4 2021 | 754 | $12.0B |
| Q3 2021 | 711 | $9.94B |
| Q2 2021 | 687 | $9.70B |
| Q1 2021 | 630 | $8.44B |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| MML Investors Services, LLC | 78,764 | $8.08M | 0.02% | −1,998−2.5% | Reduced |
| B&I Capital AG | 78,655 | $8.07M | 2.74% | +1,995+2.6% | Added |
| New Age Alpha Advisors, LLC | 77,855 | $7.99M | 0.35% | −18,666−19.3% | Reduced |
| Salem Investment Counselors Inc | 77,234 | $7.92M | 0.25% | −310.0% | Reduced |
| Wealthfront Advisers LLC | 75,981 | $7.79M | 0.02% | +200+0.3% | Added |
| Varma Mutual Pension Insurance Co | 74,538 | $7.65M | 0.06% | −5,700−7.1% | Reduced |
| Eisler Capital Management Ltd. | 73,981 | $7.58M | 0.26% | −33,739−31.3% | Reduced |
| ASR Vermogensbeheer N.V. | 73,681 | $7.56M | 0.10% | −16,920−18.7% | Reduced |
| Kempen Capital Management N.V. | 73,433 | $7.53M | 0.07% | +2,792+4.0% | Added |
| Czech National Bank | 72,119 | $7.40M | 0.06% | +4,652+6.9% | Added |
| Candriam Luxembourg S.C.A. | 71,723 | $7.36M | 0.04% | +1,706+2.4% | Added |
| Azimuth Capital Investment Management LLC | 68,662 | $7.04M | 0.26% | +33,946+97.8% | Added |
| Burney Co | 66,809 | $6.85M | 0.23% | −85,339−56.1% | Reduced |
| Engineers Gate Manager LP | 66,745 | $6.85M | 0.09% | +11,619+21.1% | Added |
| Knights of Columbus Asset Advisors LLC | 66,621 | $6.83M | 0.41% | −40,165−37.6% | Reduced |
| Thompson Siegel & Walmsley LLC | 66,200 | $6.79M | 0.11% | +66,200 | New |
| Crossmark Global Holdings, Inc. | 65,793 | $6.75M | 0.11% | +3,765+6.1% | Added |
| KBC Group NV | 65,688 | $6.74M | 0.02% | −1,665−2.5% | Reduced |
| The PNC Financial Services Group, Inc. | 65,386 | $6.71M | 0.00% | +6,937+11.9% | Added |
| Van Eck Associates Corp | 65,104 | $6.68M | 0.01% | +7,215+12.5% | Added |
| Advisors Asset Management, Inc. | 63,511 | $6.51M | 0.12% | +1,193+1.9% | Added |
| Nordea Investment Management AB | 63,914 | $6.50M | 0.01% | +800+1.3% | Added |
| Brevan Howard Capital Management LP | 61,532 | $6.31M | 0.07% | +61,532 | New |
| ProShare Advisors LLC | 60,870 | $6.24M | 0.01% | +4,694+8.4% | Added |
| Public Sector Pension Investment Board | 60,672 | $6.22M | 0.03% | −17,870−22.8% | Reduced |
| Northwestern Mutual Wealth Management Co | 60,230 | $6.18M | 0.00% | +5,458+10.0% | Added |
| USS Investment Management Ltd | 59,840 | $6.14M | 0.04% | +138+0.2% | Added |
| Polar Asset Management Partners Inc. | 59,646 | $6.12M | 0.15% | +3,600+6.4% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 58,995 | $6.05M | 0.03% | +249+0.4% | Added |
| Hennion & Walsh Asset Management, Inc. | 58,328 | $5.98M | 0.24% | +866+1.5% | Added |
| First Trust Advisors LP | 57,703 | $5.92M | 0.00% | −94,007−62.0% | Reduced |
| Amalgamated Bank | 57,071 | $5.85M | 0.05% | −3,014−5.0% | Reduced |
| Peapack Gladstone Financial Corp | 56,085 | $5.75M | 0.08% | −513−0.9% | Reduced |
| Woodstock Corp | 55,378 | $5.68M | 0.52% | +1,950+3.6% | Added |
| Man Group plc | 55,123 | $5.65M | 0.01% | −159,653−74.3% | Reduced |
| Congress Wealth Management LLC | 54,950 | $5.64M | 0.05% | +25,391+85.9% | Added |
| First National Trust Co | 54,706 | $5.61M | 0.21% | −5,494−9.1% | Reduced |
| Prudential PLC | 54,301 | $5.57M | 0.03% | +8,142+17.6% | Added |
| American Trust Investment Advisors, LLC | 54,220 | $5.56M | 2.81% | −9,294−14.6% | Reduced |
| Janus Henderson Group PLC | 54,137 | $5.55M | 0.00% | +4,966+10.1% | Added |
| DnB Asset Management AS | 54,032 | $5.54M | 0.02% | +2,300+4.4% | Added |
| Ethic Inc. | 53,664 | $5.49M | 0.10% | −4,614−7.9% | Reduced |
| Nia Impact Advisors, LLC | 52,502 | $5.39M | 1.86% | −11,574−18.1% | Reduced |
| Werlinich Asset Management, LLC | 51,812 | $5.31M | 2.90% | 00.0% | Unchanged |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 50,784 | $5.21M | 0.05% | +600+1.2% | Added |
| Promethos Capital, LLC | 50,782 | $5.21M | 1.76% | 00.0% | Unchanged |
| Moors & Cabot, Inc. | 50,274 | $5.16M | 0.24% | −266−0.5% | Reduced |
| Lighthouse Investment Partners, LLC | 50,200 | $5.15M | 0.22% | +47,700+1,908.0% | Added |
| Wealth Enhancement Advisory Services, LLC | 50,250 | $5.06M | 0.01% | +1,164+2.4% | Added |
| Yousif Capital Management, LLC | 48,874 | $5.01M | 0.05% | −108−0.2% | Reduced |
| Baird Financial Group, Inc. | 48,670 | $4.99M | 0.01% | −13,640−21.9% | Reduced |
| Utah Retirement Systems | 48,049 | $4.93M | 0.05% | −165−0.3% | Reduced |
| Federation des caisses Desjardins du Quebec | 46,646 | $4.78M | 0.02% | +4,374+10.3% | Added |
| Swiss Life Asset Management Ltd | 46,587 | $4.78M | 0.03% | +1,262+2.8% | Added |
| Prevail Innovative Wealth Advisors, LLC | 46,555 | $4.78M | 1.07% | +14,907+47.1% | Added |
| Raiffeisen Bank International AG | 46,340 | $4.76M | 0.07% | −2,830−5.8% | Reduced |
| British Columbia Investment Management Corp | 46,215 | $4.74M | 0.03% | −9,907−17.7% | Reduced |
| Xponance, Inc. | 46,167 | $4.74M | 0.04% | −34,447−42.7% | Reduced |
| Mariner, LLC | 45,655 | $4.68M | 0.01% | +4,035+9.7% | Added |
| RB Capital Management, LLC | 45,619 | $4.68M | 1.06% | +521+1.2% | Added |
| Allianz Asset Management GmbH | 45,186 | $4.63M | 0.01% | −10,064−18.2% | Reduced |
| Alberta Investment Management Corp | 44,900 | $4.61M | 0.04% | −3,900−8.0% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 44,869 | $4.60M | 0.02% | −1,212−2.6% | Reduced |
| Teacher Retirement System of Texas | 44,608 | $4.58M | 0.02% | −13,216−22.9% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 44,369 | $4.55M | 0.04% | +2,010+4.7% | Added |
| New York Life Investment Management LLC | 44,252 | $4.54M | 0.04% | +735+1.7% | Added |
| Spirit of America Management Corp | 43,250 | $4.44M | 0.93% | 00.0% | Unchanged |
| WealthTrust Axiom LLC | 42,649 | $4.37M | 1.29% | −2,568−5.7% | Reduced |
| Truist Financial Corp | 42,242 | $4.33M | 0.01% | −842−2.0% | Reduced |
| Bank of Nova Scotia | 42,189 | $4.33M | 0.01% | −1,240−2.9% | Reduced |
| Holderness Investments Co | 41,828 | $4.29M | 0.92% | −225−0.5% | Reduced |
| Lee Danner & Bass Inc | 41,700 | $4.28M | 0.33% | +5,675+15.8% | Added |
| CIBC Asset Management Inc | 41,047 | $4.21M | 0.01% | −3,619−8.1% | Reduced |
| Vectors Research Management, LLC | 40,820 | $4.19M | 1.44% | −1,256−3.0% | Reduced |
| NEOS Investment Management LLC | 39,060 | $4.01M | 0.05% | +12,969+49.7% | Added |
| Pensionfund DSM Netherlands | 38,500 | $3.95M | 2.66% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 38,385 | $3.94M | 0.03% | +353+0.9% | Added |
| JustInvest LLC | 37,986 | $3.90M | 0.04% | +12,842+51.1% | Added |
| Shell Asset Management Co | 37,414 | $3.84M | 0.13% | +7,917+26.8% | Added |
| Rafferty Asset Management, LLC | 37,390 | $3.84M | 0.01% | +5,361+16.7% | Added |
| Trinity Legacy Partners, LLC | 38,466 | $3.78M | 0.92% | −176−0.5% | Reduced |
| Pathstone Holdings, LLC | 36,488 | $3.75M | 0.01% | +316+0.9% | Added |
| O'Shaughnessy Asset Management, LLC | 36,526 | $3.75M | 0.03% | +8,157+28.8% | Added |
| Two Sigma Advisers, LP | 36,100 | $3.70M | 0.01% | −26,600−42.4% | Reduced |
| Pacitti Group Inc. | 35,247 | $3.64M | 1.58% | +1,048+3.1% | Added |
| Banque Cantonale Vaudoise | 35,293 | $3.62M | 0.15% | +11,478+48.2% | Added |
| Cerity Partners LLC | 35,292 | $3.62M | 0.01% | +1,222+3.6% | Added |
| Cyndeo Wealth Partners, LLC | 34,227 | $3.51M | 0.21% | −862−2.5% | Reduced |
| Vestcor Inc | 34,212 | $3.51M | 0.11% | −46,376−57.5% | Reduced |
| Hourglass Capital, LLC | 34,060 | $3.49M | 0.86% | +660+2.0% | Added |
| Mutual of America Capital Management LLC | 33,833 | $3.47M | 0.04% | −323−0.9% | Reduced |
| Venture Visionary Partners LLC | 32,989 | $3.38M | 0.13% | +371+1.1% | Added |
| GWM Advisors LLC | 32,646 | $3.35M | 0.02% | +5,250+19.2% | Added |
| Smithfield Trust Co | 32,569 | $3.34M | 0.16% | 00.0% | Unchanged |
| One Capital Management, LLC | 32,563 | $3.34M | 0.12% | −1,175−3.5% | Reduced |
| Horizon Kinetics Asset Management LLC | 32,455 | $3.33M | 0.04% | 00.0% | Unchanged |
| Nepsis, Inc. | 31,994 | $3.28M | 0.91% | −9,076−22.1% | Reduced |
| Siemens Fonds Invest GmbH | 31,945 | $3.28M | 0.19% | +781+2.5% | Added |
| Woodline Partners LP | 31,839 | $3.27M | 0.02% | +7,097+28.7% | Added |
| Courier Capital LLC | 30,912 | $3.17M | 0.19% | −697−2.2% | Reduced |