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 2023
Institutional positions in Iron Mountain Inc as of Sep 30, 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
- 831
- +22 vs. Q2 2023
- Shares held
- 229.7M
- +6.17M (+2.8%) vs. Q2 2023
- Total value
- $13.7B
- +$977.9M (+7.7%) vs. Q2 2023
- New holders
- 88
- 289 more added
- Sold out
- 66
- 315 more reduced
8 institutions that held it in Q2 2023 haven't filed for Q3 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2023
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q2 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 46,612,766 | $2.77B | 0.07% | −241,020−0.5% | Reduced |
| BlackRock Inc. | 22,138,459 | $1.32B | 0.04% | −243,394−1.1% | Reduced |
| Capital World Investors | 18,835,824 | $1.12B | 0.22% | −1,524,206−7.5% | Reduced |
| State Street Corp | 13,193,403 | $792.8M | 0.04% | −721,701−5.2% | Reduced |
| Geode Capital Management, LLC | 7,538,028 | $447.3M | 0.05% | +145,250+2.0% | Added |
| Cohen & Steers, Inc. | 7,439,677 | $442.3M | 1.02% | −286,090−3.7% | Reduced |
| Deutsche Bank AG | 4,571,545 | $271.8M | 0.18% | +29,683+0.7% | Added |
| Dimensional Fund Advisors LP | 4,303,916 | $255.9M | 0.08% | +32,452+0.8% | Added |
| Morgan Stanley | 4,222,129 | $251.0M | 0.03% | −152,975−3.5% | Reduced |
| Northern Trust Corp | 3,913,828 | $232.7M | 0.05% | +47,902+1.2% | Added |
| Pictet Asset Management Holding SA | 3,390,948 | $201.6M | 0.25% | +3,390,948 | New |
| FMR LLC | 3,380,540 | $201.0M | 0.02% | −351,595−9.4% | Reduced |
| Invesco Ltd. | 3,243,435 | $192.8M | 0.05% | +1,077,339+49.7% | Added |
| Charles Schwab Investment Management Inc | 3,075,940 | $182.9M | 0.05% | −719,329−19.0% | Reduced |
| Wellington Management Group LLP | 3,012,260 | $179.1M | 0.04% | +2,286,711+315.2% | Added |
| Amundi | 2,652,647 | $160.0M | 0.08% | −1,159,043−30.4% | Reduced |
| Norges Bank | 2,674,814 | $159.0M | 0.03% | +610,263+29.6% | Added |
| Daiwa Securities Group Inc. | 2,539,724 | $151.0M | 1.08% | +672,684+36.0% | Added |
| Epoch Investment Partners, Inc. | 2,357,768 | $140.2M | 0.89% | −367,410−13.5% | Reduced |
| Bank of New York Mellon Corp | 2,310,210 | $137.3M | 0.03% | −55,752−2.4% | Reduced |
| Legal & General Group Plc | 2,200,603 | $130.8M | 0.05% | −83,094−3.6% | Reduced |
| Citadel Advisors LLC | 1,814,896 | $107.9M | 0.12% | +1,198,132+194.3% | Added |
| Ameriprise Financial Inc | 1,727,813 | $103.7M | 0.03% | +1,178,754+214.7% | Added |
| JPMorgan Chase & Co | 1,585,420 | $94.3M | 0.01% | −374,365−19.1% | Reduced |
| UBS Asset Management Americas Inc | 1,515,120 | $90.1M | 0.04% | +477,444+46.0% | Added |
| Russell Investments Group, Ltd. | 1,308,798 | $77.9M | 0.15% | +224,714+20.7% | Added |
| Prudential Financial Inc | 1,243,519 | $73.9M | 0.12% | −71,407−5.4% | Reduced |
| DekaBank Deutsche Girozentrale | 1,105,599 | $66.2M | 0.15% | −17,396−1.5% | Reduced |
| CIBC Private Wealth Group, LLC | 1,100,879 | $65.4M | 0.15% | −153,184−12.2% | Reduced |
| American Century Companies Inc | 1,058,277 | $62.9M | 0.05% | +233,547+28.3% | Added |
| Agf Management Ltd | 1,002,631 | $59.6M | 0.42% | +24,836+2.5% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 950,703 | $56.5M | 0.05% | −12,613−1.3% | Reduced |
| Bank of America Corp | 946,771 | $56.3M | 0.01% | +65,233+7.4% | Added |
| Swiss National Bank | 938,061 | $55.8M | 0.04% | −114,800−10.9% | Reduced |
| UBS Group AG | 892,448 | $53.1M | 0.02% | +30,140+3.5% | Added |
| Goldman Sachs Group Inc | 880,709 | $52.4M | 0.01% | +46,580+5.6% | Added |
| Heitman Real Estate Securities LLC | 868,819 | $51.7M | 3.11% | +868,819 | New |
| Canada Pension Plan Investment Board | 859,490 | $51.1M | 0.07% | −8,100−0.9% | Reduced |
| Rockefeller Capital Management L.P. | 835,557 | $49.7M | 0.19% | −61,378−6.8% | Reduced |
| Nuveen Asset Management, LLC | 832,937 | $49.5M | 0.02% | −37,440−4.3% | Reduced |
| Captrust Financial Advisors | 767,677 | $45.6M | 0.17% | +483,757+170.4% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 743,910 | $44.2M | 0.14% | +26,240+3.7% | Added |
| Welch & Forbes LLC | 737,694 | $43.9M | 0.73% | −6,830−0.9% | Reduced |
| Neuberger Berman Group LLC | 710,885 | $42.3M | 0.04% | −307,653−30.2% | Reduced |
| Rhumbline Advisers | 647,059 | $38.5M | 0.04% | −2,074−0.3% | Reduced |
| First Republic Investment Management, Inc. | 646,426 | $38.4M | 0.11% | +646,426 | New |
| Wells Fargo & Company | 640,480 | $38.1M | 0.01% | −38,906−5.7% | Reduced |
| Border to Coast Pensions Partnership Ltd | 581,040 | $34.8M | 0.93% | −25,000−4.1% | Reduced |
| Bank of Montreal | 546,709 | $34.6M | 0.02% | −34,578−5.9% | Reduced |
| California Public Employees Retirement System | 578,558 | $34.4M | 0.03% | −6,523−1.1% | Reduced |
| Brookfield Asset Management Inc. | 575,809 | $34.2M | 0.21% | +575,809 | New |
| Envestnet Asset Management Inc | 568,244 | $33.8M | 0.02% | −30,480−5.1% | Reduced |
| Asset Management One Co.,Ltd. | 567,274 | $33.7M | 0.15% | −108,110−16.0% | Reduced |
| Barclays PLC | 564,488 | $33.6M | 0.02% | −35,105−5.9% | Reduced |
| Credit Suisse AG | 535,844 | $31.9M | 0.03% | +12,873+2.5% | Added |
| Stifel Financial Corp | 483,519 | $28.7M | 0.04% | −32,848−6.4% | Reduced |
| Price T Rowe Associates Inc | 474,443 | $28.2M | 0.00% | −1,106−0.2% | Reduced |
| LPL Financial LLC | 473,604 | $28.2M | 0.02% | +2,338+0.5% | Added |
| Marble Harbor Investment Counsel, LLC | 461,402 | $27.4M | 3.60% | −5,507−1.2% | Reduced |
| California State Teachers Retirement System | 455,449 | $27.1M | 0.04% | −20,200−4.2% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 435,101 | $25.9M | 0.05% | +11,123+2.6% | Added |
| National Pension Service | 413,929 | $24.8M | 0.04% | −14,260−3.3% | Reduced |
| Pacer Advisors, Inc. | 407,677 | $24.2M | 0.09% | −86,072−17.4% | Reduced |
| Nomura Asset Management Co Ltd | 405,661 | $24.1M | 0.11% | +3,657+0.9% | Added |
| Cookson Peirce & Co Inc | 405,203 | $24.1M | 1.58% | −2,856−0.7% | Reduced |
| Alliancebernstein L.P. | 364,810 | $21.7M | 0.01% | −32,765−8.2% | Reduced |
| State of Tennessee, Treasury Department | 362,537 | $21.6M | 0.09% | +260,042+253.7% | Added |
| HSBC Holdings PLC | 360,586 | $21.5M | 0.02% | −8,606−2.3% | Reduced |
| Voloridge Investment Management, LLC | 359,924 | $21.4M | 0.11% | +288,309+402.6% | Added |
| Raymond James & Associates | 359,759 | $21.4M | 0.02% | +3,037+0.9% | Added |
| Blair William & Co | 353,827 | $21.0M | 0.08% | +1,176+0.3% | Added |
| Principal Financial Group Inc | 353,664 | $21.0M | 0.02% | +9,971+2.9% | Added |
| Mirae Asset Global Investments Co., Ltd. | 345,344 | $20.5M | 0.05% | +22,766+7.1% | Added |
| Balyasny Asset Management LLC | 326,624 | $19.4M | 0.05% | +310,607+1,939.2% | Added |
| Adell Harriman & Carpenter Inc | 325,631 | $19.4M | 2.01% | +4,520+1.4% | Added |
| CI Private Wealth, LLC | 317,388 | $18.9M | 0.04% | −76,077−19.3% | Reduced |
| New York State Common Retirement Fund | 316,640 | $18.8M | 0.03% | −29,414−8.5% | Reduced |
| New York State Teachers Retirement System | 316,095 | $18.8M | 0.05% | −3,155−1.0% | Reduced |
| Brookstone Capital Management | 314,391 | $18.8M | 0.41% | −54,561−14.8% | Reduced |
| Aviva PLC | 315,287 | $18.7M | 0.08% | −51,391−14.0% | Reduced |
| Great West Life Assurance Co | 314,558 | $18.7M | 0.04% | −1,210−0.4% | Reduced |
| State Board of Administration of Florida Retirement System | 313,939 | $18.7M | 0.04% | +430+0.1% | Added |
| Royal Bank of Canada | 313,408 | $18.6M | 0.01% | −211,966−40.3% | Reduced |
| United Bank | 295,262 | $17.6M | 2.31% | −5,745−1.9% | Reduced |
| Dana Investment Advisors, Inc. | 292,319 | $17.4M | 0.89% | −13,259−4.3% | Reduced |
| Adage Capital Partners GP, L.L.C. | 290,152 | $17.2M | 0.04% | +49,600+20.6% | Added |
| TD Asset Management Inc | 287,910 | $17.1M | 0.02% | −35,553−11.0% | Reduced |
| ExodusPoint Capital Management, LP | 277,132 | $16.5M | 0.21% | +78,725+39.7% | Added |
| Crossmark Global Holdings, Inc. | 257,978 | $15.4M | 0.35% | +5,141+2.0% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 254,031 | $15.1M | 0.07% | +174,813+220.7% | Added |
| Retirement Systems of Alabama | 242,962 | $14.4M | 0.07% | −1,190−0.5% | Reduced |
| Swedbank AB | 241,702 | $14.4M | 0.03% | +6,000+2.5% | Added |
| Citigroup Inc | 237,090 | $14.1M | 0.02% | +11,911+5.3% | Added |
| SEI Investments Co | 231,332 | $13.8M | 0.02% | −76,050−24.7% | Reduced |
| Uniplan Investment Counsel, Inc. | 229,308 | $13.5M | 1.04% | +2,944+1.3% | Added |
| Jane Street Group, LLC | 224,178 | $13.3M | 0.02% | +159,295+245.5% | Added |
| First Trust Advisors LP | 222,610 | $13.2M | 0.02% | −38,092−14.6% | Reduced |
| Manufacturers Life Insurance Company, The | 222,270 | $13.2M | 0.01% | +14,905+7.2% | Added |
| Allianz Asset Management GmbH | 214,524 | $12.8M | 0.03% | −16,430−7.1% | Reduced |
| Raymond James Financial Services Advisors, Inc. | 214,090 | $12.7M | 0.02% | −36,900−14.7% | Reduced |