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 8 sales; 1,173 institutions reported holding it in 13F filings for Q2 2026, worth $32.4B in total; no superinvestor holds it.
13F holders, Q3 2021
Institutional positions in Iron Mountain Inc as of Sep 30, 2021. 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
- 711
- +31 vs. Q2 2021
- Shares held
- 228.6M
- +133.0K (+0.1%) vs. Q2 2021
- Total value
- $9.94B
- +$260.5M (+2.7%) vs. Q2 2021
- New holders
- 73
- 282 more added
- Sold out
- 42
- 244 more reduced
7 institutions that held it in Q2 2021 haven't filed for Q3 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2021: 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, Q3 2021
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q2 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 48,634,068 | $2.11B | 0.05% | +129,949+0.3% | Added |
| Capital World Investors | 32,710,171 | $1.42B | 0.24% | −2,7900.0% | Reduced |
| BlackRock Inc. | 22,870,617 | $993.7M | 0.03% | −263,923−1.1% | Reduced |
| State Street Corp | 13,837,484 | $609.6M | 0.03% | +380,178+2.8% | Added |
| Geode Capital Management, LLC | 6,330,235 | $275.5M | 0.04% | +231,564+3.8% | Added |
| Northern Trust Corp | 4,258,268 | $185.0M | 0.03% | +594,092+16.2% | Added |
| Invesco Ltd. | 4,257,624 | $185.0M | 0.05% | −619,758−12.7% | Reduced |
| Dimensional Fund Advisors LP | 4,222,054 | $183.5M | 0.06% | −44,123−1.0% | Reduced |
| Morgan Stanley | 4,195,161 | $182.3M | 0.02% | +1,139,861+37.3% | Added |
| FMR LLC | 4,156,502 | $180.6M | 0.01% | −17,356−0.4% | Reduced |
| Epoch Investment Partners, Inc. | 3,559,169 | $154.6M | 0.86% | −185,970−5.0% | Reduced |
| Charles Schwab Investment Management Inc | 3,413,868 | $148.3M | 0.05% | +107,354+3.2% | Added |
| Bank of New York Mellon Corp | 3,216,489 | $139.8M | 0.03% | −26,750−0.8% | Reduced |
| Amundi | 2,725,513 | $118.4M | 0.08% | +25,464+0.9% | Added |
| LSV Asset Management | 2,686,994 | $116.7M | 0.21% | +349,858+15.0% | Added |
| Norges Bank | 2,616,436 | $113.7M | 0.03% | +41,884+1.6% | Added |
| JPMorgan Chase & Co | 2,382,906 | $103.5M | 0.01% | −150,410−5.9% | Reduced |
| Deutsche Bank AG | 1,960,601 | $85.2M | 0.04% | −94,251−4.6% | Reduced |
| Legal & General Group Plc | 1,919,441 | $83.4M | 0.03% | +37,371+2.0% | Added |
| Pacer Advisors, Inc. | 1,552,850 | $67.5M | 0.86% | +365,854+30.8% | Added |
| UBS Asset Management Americas Inc | 1,218,576 | $52.9M | 0.02% | −199,932−14.1% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 1,153,112 | $50.1M | 0.03% | −47,993−4.0% | Reduced |
| Swiss National Bank | 1,144,447 | $49.7M | 0.03% | −34,600−2.9% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 1,137,086 | $49.4M | 0.13% | −18,504−1.6% | Reduced |
| Wells Fargo & Company | 1,061,146 | $46.1M | 0.01% | −166,537−13.6% | Reduced |
| Parametric Portfolio Associates LLC | 1,043,163 | $45.3M | 0.03% | −5,924−0.6% | Reduced |
| Nuveen Asset Management, LLC | 1,038,172 | $45.1M | 0.01% | −165,492−13.7% | Reduced |
| Nordea Investment Management AB | 982,431 | $43.7M | 0.06% | +50,538+5.4% | Added |
| Barclays PLC | 993,080 | $43.1M | 0.03% | +155,028+18.5% | Added |
| Janus Henderson Group PLC | 959,069 | $41.7M | 0.02% | +573,868+149.0% | Added |
| Bank of America Corp | 915,598 | $39.8M | 0.00% | +110,196+13.7% | Added |
| Goldman Sachs Group Inc | 864,502 | $37.6M | 0.01% | +94,664+12.3% | Added |
| Rockefeller Capital Management L.P. | 744,175 | $32.3M | 0.17% | +21,724+3.0% | Added |
| First Republic Investment Management, Inc. | 730,400 | $31.7M | 0.08% | +60,901+9.1% | Added |
| Welch & Forbes LLC | 722,326 | $31.4M | 0.52% | +2,843+0.4% | Added |
| Asset Management One Co.,Ltd. | 702,389 | $30.5M | 0.12% | −75,640−9.7% | Reduced |
| California Public Employees Retirement System | 672,259 | $29.2M | 0.02% | −1,581,932−70.2% | Reduced |
| American Century Companies Inc | 642,979 | $27.9M | 0.02% | −151,215−19.0% | Reduced |
| UBS Group AG | 631,436 | $27.4M | 0.01% | +90,428+16.7% | Added |
| Ameriprise Financial Inc | 569,192 | $24.8M | 0.01% | +83,213+17.1% | Added |
| AXA S.A. | 551,800 | $24.0M | 0.07% | +43,400+8.5% | Added |
| Alliancebernstein L.P. | 539,700 | $23.4M | 0.01% | −38,160−6.6% | Reduced |
| Price T Rowe Associates Inc | 522,828 | $22.7M | 0.00% | −7,903−1.5% | Reduced |
| Rhumbline Advisers | 519,472 | $22.6M | 0.03% | +4,489+0.9% | Added |
| Envestnet Asset Management Inc | 514,395 | $22.4M | 0.01% | +4,976+1.0% | Added |
| California State Teachers Retirement System | 509,591 | $22.1M | 0.03% | −9,813−1.9% | Reduced |
| Handelsbanken Fonder AB | 496,786 | $21.6M | 0.11% | +13,278+2.7% | Added |
| Citigroup Inc | 482,604 | $21.0M | 0.02% | −257,597−34.8% | Reduced |
| Bank of Montreal | 470,499 | $20.9M | 0.01% | +55,454+13.4% | Added |
| Marble Harbor Investment Counsel, LLC | 474,921 | $20.6M | 2.78% | +800.0% | Added |
| Allianz Asset Management GmbH | 474,809 | $20.6M | 0.02% | +221,836+87.7% | Added |
| HSBC Holdings PLC | 429,173 | $18.8M | 0.02% | −278,956−39.4% | Reduced |
| LPL Financial LLC | 408,260 | $17.7M | 0.02% | +9,548+2.4% | Added |
| PGGM Investments | 387,973 | $16.9M | 0.09% | +5,665+1.5% | Added |
| Susquehanna Fundamental Investments, LLC | 385,716 | $16.8M | 0.31% | −45,761−10.6% | Reduced |
| Avalon Investment & Advisory | 385,294 | $16.7M | 0.39% | −29,825−7.2% | Reduced |
| Stifel Financial Corp | 384,830 | $16.7M | 0.02% | +96,031+33.3% | Added |
| Raymond James & Associates | 382,286 | $16.6M | 0.01% | +29,734+8.4% | Added |
| United Bank | 381,464 | $16.6M | 2.22% | −10,236−2.6% | Reduced |
| Principal Financial Group Inc | 370,899 | $16.1M | 0.01% | +6,746+1.9% | Added |
| STRS Ohio | 363,125 | $15.8M | 0.06% | +35,540+10.8% | Added |
| New York State Teachers Retirement System | 359,833 | $15.6M | 0.03% | +25,571+7.6% | Added |
| TD Asset Management Inc | 350,516 | $15.2M | 0.02% | −6,032−1.7% | Reduced |
| State Board of Administration of Florida Retirement System | 350,114 | $15.2M | 0.03% | −5,196−1.5% | Reduced |
| New York State Common Retirement Fund | 343,200 | $14.9M | 0.02% | +14,882+4.5% | Added |
| Credit Suisse AG | 329,997 | $14.3M | 0.01% | −30,825−8.5% | Reduced |
| Nomura Asset Management Co Ltd | 324,016 | $14.1M | 0.08% | −28,761−8.2% | Reduced |
| Robeco Institutional Asset Management B.V. | 313,411 | $13.6M | 0.03% | +19,536+6.6% | Added |
| Adage Capital Partners GP, L.L.C. | 300,352 | $13.1M | 0.03% | −4,500−1.5% | Reduced |
| Retirement Systems of Alabama | 296,322 | $12.9M | 0.05% | −7,316−2.4% | Reduced |
| Great West Life Assurance Co | 292,672 | $12.8M | 0.03% | +9,195+3.2% | Added |
| First Trust Advisors LP | 291,075 | $12.6M | 0.01% | +165,117+131.1% | Added |
| Zimmer Partners, LP | 287,500 | $12.5M | 0.20% | +175,000+155.6% | Added |
| Swedbank AB | 285,100 | $12.4M | 0.02% | +3,442+1.2% | Added |
| Boston Common Asset Management, LLC | 277,674 | $12.1M | 0.52% | +2,600+0.9% | Added |
| Adell Harriman & Carpenter Inc | 277,545 | $12.1M | 1.26% | +275+0.1% | Added |
| Blair William & Co | 264,208 | $11.5M | 0.04% | +8,989+3.5% | Added |
| Manufacturers Life Insurance Company, The | 261,178 | $11.3M | 0.01% | −25,891−9.0% | Reduced |
| Hall Private Wealth Advisors | 260,198 | $11.3M | 7.21% | −66,112−20.3% | Reduced |
| United Capital Financial Advisers, LLC | 257,284 | $11.2M | 0.06% | −3,452−1.3% | Reduced |
| Skandinaviska Enskilda Banken AB (publ) | 254,993 | $11.1M | 0.06% | −19,800−7.2% | Reduced |
| Nisa Investment Advisors, LLC | 253,790 | $11.0M | 0.07% | +55,890+28.2% | Added |
| Commerce Bank | 253,221 | $11.0M | 0.08% | −268,470−51.5% | Reduced |
| Prudential Financial Inc | 245,945 | $10.9M | 0.02% | −173,960−41.4% | Reduced |
| Royal Bank of Canada | 250,737 | $10.9M | 0.00% | −44,163−15.0% | Reduced |
| Canada Pension Plan Investment Board | 246,613 | $10.7M | 0.01% | +241,891+5,122.6% | Added |
| Pictet Asset Management SA | 239,896 | $10.4M | 0.01% | +239,896 | New |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 238,670 | $10.4M | 0.02% | 00.0% | Unchanged |
| Commonwealth Equity Services, LLC | 236,997 | $10.3M | 0.03% | +43,777+22.7% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 234,348 | $10.2M | 0.05% | +22,632+10.7% | Added |
| TCW Group Inc | 231,364 | $10.1M | 0.09% | −64,104−21.7% | Reduced |
| Tdam USA Inc. | 230,478 | $10.0M | 0.66% | −6,533−2.8% | Reduced |
| Storebrand Asset Management AS | 217,266 | $9.44M | 0.05% | −7,175−3.2% | Reduced |
| SG Americas Securities, LLC | 214,355 | $9.31M | 0.05% | −130,970−37.9% | Reduced |
| Korea Investment CORP | 212,100 | $9.22M | 0.03% | +107,900+103.6% | Added |
| WealthTrust Axiom LLC | 207,506 | $9.02M | 3.05% | −9,328−4.3% | Reduced |
| Andra AP-fonden | 206,200 | $8.96M | 0.18% | +12,300+6.3% | Added |
| Moody National Bank Trust Division | 201,520 | $8.76M | 0.13% | −233−0.1% | Reduced |
| American National Insurance Co | 201,350 | $8.75M | 0.33% | −190−0.1% | Reduced |
| Crossmark Global Holdings, Inc. | 197,829 | $8.60M | 0.20% | +180,974+1,073.7% | Added |