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 2023
Institutional positions in Iron Mountain Inc as of Dec 31, 2023. 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
- 891
- +72 vs. Q3 2023
- Shares held
- 233.7M
- +4.86M (+2.1%) vs. Q3 2023
- Total value
- $16.4B
- +$2.74B (+20.1%) vs. Q3 2023
- New holders
- 136
- 277 more added
- Sold out
- 64
- 346 more reduced
12 institutions that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2023: 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 2023
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 46,275,110 | $3.24B | 0.07% | −337,656−0.7% | Reduced |
| BlackRock Inc. | 23,272,793 | $1.63B | 0.04% | +1,134,334+5.1% | Added |
| Cohen & Steers, Inc. | 22,475,614 | $1.57B | 3.18% | +15,035,937+202.1% | Added |
| State Street Corp | 13,792,936 | $973.9M | 0.05% | +599,533+4.5% | Added |
| Geode Capital Management, LLC | 7,064,776 | $493.2M | 0.05% | −473,252−6.3% | Reduced |
| Deutsche Bank AG | 4,679,209 | $327.5M | 0.17% | +107,664+2.4% | Added |
| Dimensional Fund Advisors LP | 4,288,399 | $300.1M | 0.09% | −15,517−0.4% | Reduced |
| Capital World Investors | 4,117,079 | $288.1M | 0.05% | −14,718,745−78.1% | Reduced |
| Daiwa Securities Group Inc. | 4,086,316 | $286.0M | 1.78% | +1,546,592+60.9% | Added |
| Morgan Stanley | 3,685,807 | $257.9M | 0.02% | −536,322−12.7% | Reduced |
| FMR LLC | 3,522,885 | $246.5M | 0.02% | +142,345+4.2% | Added |
| Invesco Ltd. | 3,420,229 | $239.3M | 0.06% | +176,794+5.5% | Added |
| Pictet Asset Management Holding SA | 3,385,796 | $236.9M | 0.26% | −5,152−0.2% | Reduced |
| Norges Bank | 3,263,663 | $228.4M | 0.04% | +588,849+22.0% | Added |
| Charles Schwab Investment Management Inc | 3,157,681 | $221.0M | 0.06% | +81,741+2.7% | Added |
| Northern Trust Corp | 3,130,305 | $219.1M | 0.04% | −783,523−20.0% | Reduced |
| Wellington Management Group LLP | 2,928,630 | $204.9M | 0.04% | −83,630−2.8% | Reduced |
| Amundi | 2,440,530 | $163.9M | 0.07% | −212,117−8.0% | Reduced |
| Bank of New York Mellon Corp | 2,235,636 | $156.4M | 0.03% | −74,574−3.2% | Reduced |
| Prudential Financial Inc | 2,229,535 | $155.7M | 0.24% | +986,016+79.3% | Added |
| Legal & General Group Plc | 2,152,934 | $150.7M | 0.05% | −47,669−2.2% | Reduced |
| JPMorgan Chase & Co | 2,095,253 | $146.6M | 0.01% | +509,833+32.2% | Added |
| Russell Investments Group, Ltd. | 2,081,786 | $145.9M | 0.26% | +772,988+59.1% | Added |
| Citadel Advisors LLC | 1,982,852 | $138.8M | 0.14% | +167,956+9.3% | Added |
| Epoch Investment Partners, Inc. | 1,976,823 | $138.3M | 0.63% | −380,945−16.2% | Reduced |
| UBS Asset Management Americas Inc | 1,631,123 | $114.1M | 0.04% | +116,003+7.7% | Added |
| Ameriprise Financial Inc | 1,595,666 | $112.3M | 0.03% | −132,147−7.6% | Reduced |
| DekaBank Deutsche Girozentrale | 1,142,117 | $80.9M | 0.17% | +36,518+3.3% | Added |
| Bank of America Corp | 1,147,798 | $80.3M | 0.01% | +201,027+21.2% | Added |
| CIBC Private Wealth Group, LLC | 1,078,601 | $75.5M | 0.16% | −22,278−2.0% | Reduced |
| Agf Management Ltd | 990,998 | $69.4M | 0.41% | −11,633−1.2% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 963,359 | $67.4M | 0.05% | +12,656+1.3% | Added |
| Canada Pension Plan Investment Board | 946,990 | $66.3M | 0.08% | +87,500+10.2% | Added |
| Goldman Sachs Group Inc | 940,090 | $65.8M | 0.01% | +59,381+6.7% | Added |
| Swiss National Bank | 912,561 | $63.9M | 0.05% | −25,500−2.7% | Reduced |
| SEI Investments Co | 875,092 | $61.2M | 0.10% | +643,760+278.3% | Added |
| Captrust Financial Advisors | 825,069 | $57.7M | 0.20% | +57,392+7.5% | Added |
| UBS Group AG | 824,245 | $57.7M | 0.02% | −68,203−7.6% | Reduced |
| Nuveen Asset Management, LLC | 790,331 | $55.4M | 0.02% | −42,606−5.1% | Reduced |
| Rockefeller Capital Management L.P. | 781,851 | $54.7M | 0.18% | −53,706−6.4% | Reduced |
| Barclays PLC | 772,320 | $54.0M | 0.03% | +207,832+36.8% | Added |
| Welch & Forbes LLC | 731,578 | $51.2M | 0.77% | −6,116−0.8% | Reduced |
| American Century Companies Inc | 729,084 | $51.0M | 0.04% | −329,193−31.1% | Reduced |
| Wells Fargo & Company | 654,922 | $45.8M | 0.01% | +14,442+2.3% | Added |
| Heitman Real Estate Securities LLC | 642,471 | $45.0M | 2.42% | −226,348−26.1% | Reduced |
| Point72 Asset Management, L.P. | 639,050 | $44.7M | 0.14% | +639,050 | New |
| Neuberger Berman Group LLC | 638,028 | $44.6M | 0.04% | −72,857−10.2% | Reduced |
| Rhumbline Advisers | 637,073 | $44.6M | 0.05% | −9,986−1.5% | Reduced |
| Voloridge Investment Management, LLC | 621,230 | $43.5M | 0.17% | +261,306+72.6% | Added |
| Bank of Montreal | 608,218 | $43.0M | 0.02% | +61,509+11.3% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 595,058 | $41.6M | 0.12% | −148,852−20.0% | Reduced |
| Asset Management One Co.,Ltd. | 589,698 | $41.6M | 0.17% | +22,424+4.0% | Added |
| Border to Coast Pensions Partnership Ltd | 561,040 | $39.3M | 0.96% | −20,000−3.4% | Reduced |
| California Public Employees Retirement System | 554,841 | $38.8M | 0.03% | −23,717−4.1% | Reduced |
| Credit Suisse AG | 533,577 | $37.3M | 0.04% | −2,267−0.4% | Reduced |
| LPL Financial LLC | 518,435 | $36.3M | 0.02% | +44,831+9.5% | Added |
| Royal Bank of Canada | 505,084 | $35.3M | 0.01% | +191,676+61.2% | Added |
| Price T Rowe Associates Inc | 482,222 | $33.7M | 0.00% | +7,779+1.6% | Added |
| Stifel Financial Corp | 477,613 | $33.4M | 0.04% | −5,906−1.2% | Reduced |
| California State Teachers Retirement System | 461,203 | $32.3M | 0.04% | +5,754+1.3% | Added |
| Marble Harbor Investment Counsel, LLC | 453,467 | $31.7M | 3.90% | −7,935−1.7% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 462,652 | $30.6M | 0.05% | +27,551+6.3% | Added |
| HSBC Holdings PLC | 419,721 | $29.4M | 0.03% | +59,135+16.4% | Added |
| National Pension Service | 413,929 | $29.0M | 0.04% | 00.0% | Unchanged |
| Nomura Asset Management Co Ltd | 412,871 | $28.9M | 0.12% | +7,210+1.8% | Added |
| Alliancebernstein L.P. | 407,289 | $28.5M | 0.01% | +42,479+11.6% | Added |
| Cookson Peirce & Co Inc | 398,837 | $27.9M | 1.69% | −6,366−1.6% | Reduced |
| Pacer Advisors, Inc. | 380,026 | $26.6M | 0.08% | −27,651−6.8% | Reduced |
| Envestnet Asset Management Inc | 379,483 | $26.6M | 0.01% | −188,761−33.2% | Reduced |
| Great West Life Assurance Co | 360,418 | $25.1M | 0.06% | +45,860+14.6% | Added |
| Brookfield Asset Management Inc. | 352,803 | $24.7M | 0.14% | −223,006−38.7% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 347,566 | $24.3M | 0.05% | +2,222+0.6% | Added |
| Raymond James & Associates | 340,680 | $23.8M | 0.02% | −19,079−5.3% | Reduced |
| Blair William & Co | 339,085 | $23.7M | 0.08% | −14,742−4.2% | Reduced |
| Principal Financial Group Inc | 337,253 | $23.6M | 0.02% | −16,411−4.6% | Reduced |
| Aviva PLC | 334,156 | $23.4M | 0.08% | +18,869+6.0% | Added |
| Adell Harriman & Carpenter Inc | 324,998 | $22.7M | 2.10% | −633−0.2% | Reduced |
| State Board of Administration of Florida Retirement System | 314,006 | $22.0M | 0.05% | +670.0% | Added |
| CI Private Wealth, LLC | 309,039 | $21.6M | 0.04% | −8,349−2.6% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 308,276 | $21.6M | 0.08% | +54,245+21.4% | Added |
| New York State Teachers Retirement System | 296,584 | $20.8M | 0.05% | −19,511−6.2% | Reduced |
| New York State Common Retirement Fund | 292,853 | $20.5M | 0.03% | −23,787−7.5% | Reduced |
| TD Asset Management Inc | 292,271 | $20.5M | 0.02% | +4,361+1.5% | Added |
| Brookstone Capital Management | 291,622 | $20.4M | 0.40% | −22,769−7.2% | Reduced |
| United Bank | 287,969 | $20.2M | 2.53% | −7,293−2.5% | Reduced |
| Adage Capital Partners GP, L.L.C. | 283,652 | $19.8M | 0.04% | −6,500−2.2% | Reduced |
| State of Tennessee, Treasury Department | 259,209 | $18.1M | 0.07% | −103,328−28.5% | Reduced |
| Dana Investment Advisors, Inc. | 254,422 | $17.8M | 0.86% | −37,897−13.0% | Reduced |
| First Trust Advisors LP | 248,988 | $17.4M | 0.02% | +26,378+11.8% | Added |
| Crossmark Global Holdings, Inc. | 247,977 | $17.4M | 0.36% | −10,001−3.9% | Reduced |
| Retirement Systems of Alabama | 241,324 | $16.9M | 0.07% | −1,638−0.7% | Reduced |
| Schonfeld Strategic Advisors LLC | 235,618 | $16.5M | 0.14% | +107,099+83.3% | Added |
| Swedbank AB | 233,751 | $16.4M | 0.03% | −7,951−3.3% | Reduced |
| Manufacturers Life Insurance Company, The | 231,590 | $16.2M | 0.01% | +9,320+4.2% | Added |
| Standard Life Aberdeen plc | 227,884 | $15.9M | 0.03% | +58,480+34.5% | Added |
| Balyasny Asset Management LLC | 225,377 | $15.8M | 0.04% | −101,247−31.0% | Reduced |
| BNP Paribas Arbitrage, SA | 223,676 | $15.7M | 0.03% | +139,847+166.8% | Added |
| Allianz Asset Management GmbH | 221,160 | $15.5M | 0.03% | +6,636+3.1% | Added |
| United Capital Financial Advisers, LLC | 219,926 | $15.4M | 0.13% | +15,670+7.7% | Added |
| Raymond James Financial Services Advisors, Inc. | 211,006 | $14.8M | 0.02% | −3,084−1.4% | Reduced |