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, Q4 2021
Institutional positions in Iron Mountain Inc as of Dec 31, 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
- 754
- +53 vs. Q3 2021
- Shares held
- 228.4M
- −36.3K (0.0%) vs. Q3 2021
- Total value
- $12.0B
- +$2.01B (+20.3%) vs. Q3 2021
- New holders
- 126
- 265 more added
- Sold out
- 73
- 243 more reduced
10 institutions that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2021
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q3 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 48,432,157 | $2.53B | 0.06% | −201,911−0.4% | Reduced |
| Capital World Investors | 32,713,760 | $1.71B | 0.27% | +3,5890.0% | Added |
| BlackRock Inc. | 22,998,096 | $1.20B | 0.03% | +127,479+0.6% | Added |
| State Street Corp | 14,360,244 | $760.2M | 0.04% | +522,760+3.8% | Added |
| Geode Capital Management, LLC | 6,413,135 | $336.2M | 0.04% | +82,900+1.3% | Added |
| Northern Trust Corp | 4,559,165 | $238.6M | 0.04% | +300,897+7.1% | Added |
| Invesco Ltd. | 4,304,955 | $225.3M | 0.05% | +47,331+1.1% | Added |
| Dimensional Fund Advisors LP | 4,149,976 | $217.2M | 0.07% | −72,078−1.7% | Reduced |
| FMR LLC | 3,980,943 | $208.3M | 0.02% | −175,559−4.2% | Reduced |
| Charles Schwab Investment Management Inc | 3,463,122 | $181.2M | 0.05% | +49,254+1.4% | Added |
| Bank of New York Mellon Corp | 3,152,985 | $165.0M | 0.03% | −63,504−2.0% | Reduced |
| Norges Bank | 2,873,379 | $150.4M | 0.03% | +256,943+9.8% | Added |
| Morgan Stanley | 2,854,882 | $149.4M | 0.02% | −1,340,279−31.9% | Reduced |
| LSV Asset Management | 2,722,168 | $142.5M | 0.25% | +35,174+1.3% | Added |
| Epoch Investment Partners, Inc. | 2,698,689 | $141.2M | 0.72% | −860,480−24.2% | Reduced |
| JPMorgan Chase & Co | 2,484,928 | $130.0M | 0.02% | +102,022+4.3% | Added |
| Deutsche Bank AG | 1,882,137 | $98.5M | 0.04% | −78,464−4.0% | Reduced |
| Legal & General Group Plc | 1,860,045 | $97.3M | 0.03% | −59,396−3.1% | Reduced |
| Janus Henderson Group PLC | 1,578,972 | $82.6M | 0.03% | +619,903+64.6% | Added |
| Pacer Advisors, Inc. | 1,542,308 | $80.7M | 0.83% | −10,542−0.7% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 1,342,091 | $70.2M | 0.04% | +188,979+16.4% | Added |
| UBS Asset Management Americas Inc | 1,214,925 | $63.6M | 0.02% | −3,651−0.3% | Reduced |
| Nordea Investment Management AB | 1,189,915 | $62.9M | 0.08% | +207,484+21.1% | Added |
| Rockefeller Capital Management L.P. | 1,153,872 | $60.4M | 0.28% | +409,697+55.1% | Added |
| Bank of America Corp | 1,121,950 | $58.7M | 0.01% | +206,352+22.5% | Added |
| Mirae Asset Global Investments Co., Ltd. | 1,120,959 | $58.7M | 0.13% | −16,127−1.4% | Reduced |
| Swiss National Bank | 1,099,847 | $57.6M | 0.03% | −44,600−3.9% | Reduced |
| Parametric Portfolio Associates LLC | 1,095,922 | $57.4M | 0.03% | +52,759+5.1% | Added |
| Nuveen Asset Management, LLC | 1,080,006 | $56.5M | 0.02% | +41,834+4.0% | Added |
| American Century Companies Inc | 1,067,252 | $55.8M | 0.04% | +424,273+66.0% | Added |
| Goldman Sachs Group Inc | 1,063,839 | $55.7M | 0.01% | +199,337+23.1% | Added |
| Wells Fargo & Company | 936,955 | $49.0M | 0.01% | −124,191−11.7% | Reduced |
| Barclays PLC | 752,376 | $39.4M | 0.02% | −240,704−24.2% | Reduced |
| Asset Management One Co.,Ltd. | 744,358 | $39.3M | 0.14% | +41,969+6.0% | Added |
| First Republic Investment Management, Inc. | 749,918 | $39.2M | 0.08% | +19,518+2.7% | Added |
| Allianz Asset Management GmbH | 736,514 | $38.5M | 0.03% | +261,705+55.1% | Added |
| Welch & Forbes LLC | 719,809 | $37.7M | 0.56% | −2,517−0.3% | Reduced |
| California Public Employees Retirement System | 646,270 | $33.8M | 0.02% | −25,989−3.9% | Reduced |
| UBS Group AG | 590,468 | $30.9M | 0.01% | −40,968−6.5% | Reduced |
| Amundi | 654,287 | $29.9M | 0.02% | −2,071,226−76.0% | Reduced |
| Royal Bank of Canada | 542,492 | $28.4M | 0.01% | +291,755+116.4% | Added |
| Rhumbline Advisers | 537,569 | $28.1M | 0.03% | +18,097+3.5% | Added |
| Cbre Clarion Securities LLC | 536,000 | $28.0M | 0.40% | +536,000 | New |
| California State Teachers Retirement System | 518,289 | $27.1M | 0.03% | +8,698+1.7% | Added |
| Price T Rowe Associates Inc | 505,864 | $26.5M | 0.00% | −16,964−3.2% | Reduced |
| Envestnet Asset Management Inc | 500,975 | $26.2M | 0.01% | −13,420−2.6% | Reduced |
| Ameriprise Financial Inc | 494,811 | $25.9M | 0.01% | −74,381−13.1% | Reduced |
| Alliancebernstein L.P. | 485,876 | $25.4M | 0.01% | −53,824−10.0% | Reduced |
| Marble Harbor Investment Counsel, LLC | 475,049 | $24.9M | 2.90% | +1280.0% | Added |
| Stifel Financial Corp | 474,310 | $24.8M | 0.03% | +89,480+23.3% | Added |
| Handelsbanken Fonder AB | 469,828 | $24.6M | 0.12% | −26,958−5.4% | Reduced |
| AXA S.A. | 447,600 | $23.4M | 0.06% | −104,200−18.9% | Reduced |
| Raymond James & Associates | 444,086 | $23.2M | 0.02% | +61,800+16.2% | Added |
| Bank of Montreal | 412,775 | $21.8M | 0.01% | −57,724−12.3% | Reduced |
| LPL Financial LLC | 400,321 | $20.9M | 0.02% | −7,939−1.9% | Reduced |
| PGGM Investments | 386,721 | $20.2M | 0.10% | −1,252−0.3% | Reduced |
| Korea Investment CORP | 383,100 | $20.0M | 0.05% | +171,000+80.6% | Added |
| Voya Investment Management LLC | 382,793 | $20.0M | 0.04% | +189,714+98.3% | Added |
| Cookson Peirce & Co Inc | 379,897 | $19.9M | 1.11% | +379,897 | New |
| United Bank | 374,073 | $19.6M | 2.41% | −7,391−1.9% | Reduced |
| Principal Financial Group Inc | 363,328 | $19.0M | 0.01% | −7,571−2.0% | Reduced |
| Renaissance Technologies LLC | 357,563 | $18.7M | 0.02% | +184,200+106.3% | Added |
| STRS Ohio | 354,379 | $18.5M | 0.06% | −8,746−2.4% | Reduced |
| State Board of Administration of Florida Retirement System | 350,625 | $18.3M | 0.03% | +511+0.1% | Added |
| AustralianSuper Pty Ltd | 361,287 | $18.3M | 0.10% | +361,287 | New |
| First Trust Advisors LP | 348,767 | $18.3M | 0.02% | +57,692+19.8% | Added |
| New York State Common Retirement Fund | 347,151 | $18.2M | 0.02% | +3,951+1.2% | Added |
| Nomura Asset Management Co Ltd | 345,454 | $18.1M | 0.09% | +21,438+6.6% | Added |
| Citigroup Inc | 345,317 | $18.1M | 0.02% | −137,287−28.4% | Reduced |
| New York State Teachers Retirement System | 337,378 | $17.7M | 0.03% | −22,455−6.2% | Reduced |
| Credit Suisse AG | 329,040 | $17.2M | 0.01% | −957−0.3% | Reduced |
| Boston Common Asset Management, LLC | 328,712 | $17.2M | 0.69% | +51,038+18.4% | Added |
| Susquehanna Fundamental Investments, LLC | 327,990 | $17.2M | 0.45% | −57,726−15.0% | Reduced |
| HSBC Holdings PLC | 326,641 | $17.1M | 0.02% | −102,532−23.9% | Reduced |
| Avalon Investment & Advisory | 319,801 | $16.7M | 0.41% | −65,493−17.0% | Reduced |
| Adage Capital Partners GP, L.L.C. | 308,552 | $16.1M | 0.03% | +8,200+2.7% | Added |
| TD Asset Management Inc | 306,213 | $16.0M | 0.01% | −44,303−12.6% | Reduced |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 303,242 | $15.9M | 0.02% | +64,572+27.1% | Added |
| Great West Life Assurance Co | 300,057 | $15.7M | 0.03% | +7,385+2.5% | Added |
| Retirement Systems of Alabama | 292,038 | $15.3M | 0.05% | −4,284−1.4% | Reduced |
| Swedbank AB | 285,493 | $15.0M | 0.03% | +393+0.1% | Added |
| Adell Harriman & Carpenter Inc | 286,060 | $15.0M | 1.39% | +8,515+3.1% | Added |
| BNP Paribas Arbitrage, SA | 283,045 | $14.8M | 0.04% | +141,390+99.8% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 271,792 | $14.2M | 0.03% | +85,704+46.1% | Added |
| Blair William & Co | 270,398 | $14.2M | 0.04% | +6,190+2.3% | Added |
| United Capital Financial Advisers, LLC | 268,348 | $14.0M | 0.06% | +11,064+4.3% | Added |
| Raymond James Financial Services Advisors, Inc. | 267,390 | $14.0M | 0.03% | +109,660+69.5% | Added |
| Natixis | 258,818 | $13.5M | 0.05% | +152,831+144.2% | Added |
| Commerce Bank | 254,054 | $13.3M | 0.09% | +833+0.3% | Added |
| Manufacturers Life Insurance Company, The | 253,130 | $13.2M | 0.01% | −8,048−3.1% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 253,130 | $13.0M | 0.05% | +18,782+8.0% | Added |
| Allspring Global Investments Holdings, LLC | 247,706 | $13.0M | 0.01% | +247,706 | New |
| Hall Private Wealth Advisors | 247,561 | $13.0M | 8.05% | −12,637−4.9% | Reduced |
| TCW Group Inc | 243,985 | $12.8M | 0.11% | +12,621+5.5% | Added |
| Robeco Institutional Asset Management B.V. | 237,806 | $12.4M | 0.03% | −75,605−24.1% | Reduced |
| Prudential Financial Inc | 250,667 | $12.1M | 0.02% | +4,722+1.9% | Added |
| Crossmark Global Holdings, Inc. | 219,535 | $11.5M | 0.25% | +21,706+11.0% | Added |
| Storebrand Asset Management AS | 212,486 | $11.1M | 0.05% | −4,780−2.2% | Reduced |
| Commonwealth Equity Services, LLC | 210,888 | $11.0M | 0.02% | −26,109−11.0% | Reduced |
| Dai-Ichi Life Insurance Company, Ltd | 209,805 | $11.0M | 0.14% | +80,000+61.6% | Added |