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 |
|---|---|---|---|---|---|
| Eii Capital Management, Inc. | 25,700 | $1.12M | 0.53% | 00.0% | Unchanged |
| Kinneret Advisory, LLC | 25,708 | $1.13M | 0.13% | 00.0% | Unchanged |
| Thompson Investment Management, Inc. | 26,139 | $1.14M | 0.17% | −340−1.3% | Reduced |
| Wolverine Trading, LLC | 25,725 | $1.14M | 0.02% | +16,491+178.6% | Added |
| Edgestream Partners, L.P. | 26,360 | $1.15M | 0.07% | +26,360 | New |
| Cerity Partners LLC | 26,392 | $1.15M | 0.03% | +110.0% | Added |
| Convergence Investment Partners, LLC | 26,819 | $1.17M | 0.63% | +1,986+8.0% | Added |
| Intrua Financial, LLC | 26,101 | $1.19M | 0.22% | +26,101 | New |
| TrimTabs Asset Management, LLC | 27,186 | $1.20M | 0.58% | +6,318+30.3% | Added |
| Richard P Slaughter Associates Inc | 27,851 | $1.21M | 0.48% | −2,152−7.2% | Reduced |
| Cubic Asset Management, LLC | 28,005 | $1.22M | 0.30% | 00.0% | Unchanged |
| EAM Global Investors LLC | 28,208 | $1.23M | 0.29% | +28,208 | New |
| Hudson Portfolio Management LLC | 28,505 | $1.24M | 1.14% | −970−3.3% | Reduced |
| Eqis Capital Management, Inc. | 28,517 | $1.24M | 0.09% | +28,517 | New |
| RFG Advisory, LLC | 28,842 | $1.25M | 0.10% | −4,074−12.4% | Reduced |
| Quadrature Capital Ltd | 29,126 | $1.26M | 0.05% | +718+2.5% | Added |
| GWM Advisors LLC | 29,426 | $1.28M | 0.03% | +14,154+92.7% | Added |
| Monument Capital Management | 30,043 | $1.30M | 0.44% | +388+1.3% | Added |
| Teamwork Financial Advisors, LLC | 30,072 | $1.31M | 0.26% | +23+0.1% | Added |
| Pearl River Capital, LLC | 30,152 | $1.31M | 0.36% | −22,804−43.1% | Reduced |
| ING Groep NV | 30,146 | $1.31M | 0.02% | +587+2.0% | Added |
| Profund Advisors LLC | 30,421 | $1.32M | 0.04% | +18,262+150.2% | Added |
| Gotham Asset Management, LLC | 30,555 | $1.33M | 0.05% | +11,578+61.0% | Added |
| Jane Street Group, LLC | 30,881 | $1.34M | 0.00% | −16,714−35.1% | Reduced |
| Norinchukin Bank, The | 30,911 | $1.34M | 0.02% | +1,929+6.7% | Added |
| Dumont & Blake Investment Advisors LLC | 30,967 | $1.35M | 0.39% | −140.0% | Reduced |
| Ancora Advisors, LLC | 31,421 | $1.36M | 0.04% | −996−3.1% | Reduced |
| Ontario Teachers Pension Plan Board | 31,476 | $1.37M | 0.01% | −2,792−8.1% | Reduced |
| Oppenheimer & Co Inc | 31,486 | $1.37M | 0.03% | +14,526+85.6% | Added |
| Holderness Investments Co | 33,271 | $1.45M | 0.48% | −305−0.9% | Reduced |
| Alps Advisors Inc | 33,418 | $1.45M | 0.01% | 00.0% | Unchanged |
| Madison Asset Management, LLC | 33,622 | $1.46M | 0.02% | +1,400+4.3% | Added |
| CoreFirst Bank & Trust | 34,080 | $1.48M | 1.03% | −5,800−14.5% | Reduced |
| Susquehanna International Group, LLP | 34,253 | $1.49M | 0.00% | −28,213−45.2% | Reduced |
| Kavar Capital Partners Group, LLC | 34,298 | $1.49M | 0.34% | 00.0% | Unchanged |
| AQR Capital Management LLC | 34,643 | $1.50M | 0.00% | +17,931+107.3% | Added |
| Worldquant Millennium Advisors LLC | 34,982 | $1.52M | 0.03% | −59,047−62.8% | Reduced |
| Griffin Asset Management, Inc. | 34,988 | $1.52M | 0.19% | −5,979−14.6% | Reduced |
| Independent Advisor Alliance | 34,987 | $1.52M | 0.08% | +21,104+152.0% | Added |
| Xponance, Inc. | 35,465 | $1.54M | 0.03% | −714−2.0% | Reduced |
| Bessemer Group Inc | 35,461 | $1.54M | 0.00% | +94+0.3% | Added |
| Horizon Investments, LLC | 35,864 | $1.56M | 0.05% | −8,312−18.8% | Reduced |
| Sippican Capital Advisors | 35,962 | $1.56M | 1.35% | −560−1.5% | Reduced |
| Banque Cantonale Vaudoise | 36,057 | $1.57M | 0.07% | −10,527−22.6% | Reduced |
| RB Capital Management, LLC | 36,069 | $1.57M | 0.59% | +662+1.9% | Added |
| Two Sigma Advisers, LP | 36,100 | $1.57M | 0.00% | −18,800−34.2% | Reduced |
| Ensign Peak Advisors, Inc | 36,206 | $1.57M | 0.00% | −12,788−26.1% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 36,274 | $1.58M | 0.02% | +99+0.3% | Added |
| Virtus ETF Advisers LLC | 36,284 | $1.58M | 0.69% | −3,810−9.5% | Reduced |
| Loomis Sayles & Co L P | 36,601 | $1.59M | 0.00% | −1,713−4.5% | Reduced |
| Jupiter Asset Management Ltd | 37,912 | $1.65M | 0.02% | +11,590+44.0% | Added |
| Mutual of America Capital Management LLC | 37,978 | $1.65M | 0.02% | +288+0.8% | Added |
| Public Employees Retirement Association of Colorado | 38,491 | $1.67M | 0.01% | 00.0% | Unchanged |
| D.A. Davidson & Co. | 38,493 | $1.67M | 0.02% | +21,641+128.4% | Added |
| Avenir Corp | 39,130 | $1.70M | 0.14% | 00.0% | Unchanged |
| Mathes Company, Inc. | 39,150 | $1.70M | 0.63% | +39,150 | New |
| Shell Asset Management Co | 39,738 | $1.73M | 0.04% | +3,939+11.0% | Added |
| AE Wealth Management LLC | 39,816 | $1.73M | 0.01% | +2,838+7.7% | Added |
| DnB Asset Management AS | 39,916 | $1.73M | 0.01% | +1,657+4.3% | Added |
| IFM Investors Pty Ltd | 40,190 | $1.75M | 0.04% | −906−2.2% | Reduced |
| Ingalls & Snyder LLC | 41,018 | $1.78M | 0.08% | −500−1.2% | Reduced |
| Mercer Global Advisors Inc | 41,149 | $1.79M | 0.01% | +4,848+13.4% | Added |
| Hartford Investment Management Co | 41,267 | $1.79M | 0.05% | −3,287−7.4% | Reduced |
| Sculati Wealth Management, LLC | 41,326 | $1.80M | 0.95% | +224+0.5% | Added |
| Roberts Wealth Advisors, LLC | 42,212 | $1.83M | 0.73% | +42,212 | New |
| Eaton Vance Management | 50,678 | $1.85M | 0.00% | −2,985−5.6% | Reduced |
| Cetera Investment Advisers | 42,676 | $1.85M | 0.03% | −470−1.1% | Reduced |
| Ziegler Capital Management, LLC | 42,394 | $1.86M | 0.07% | −17,794−29.6% | Reduced |
| CIBC World Markets Inc. | 42,766 | $1.86M | 0.01% | +1,943+4.8% | Added |
| DekaBank Deutsche Girozentrale | 41,895 | $1.86M | 0.01% | +10,782+34.7% | Added |
| Pacitti Group Inc. | 42,863 | $1.86M | 1.16% | +6,971+19.4% | Added |
| DuPont Capital Management Corp | 43,067 | $1.87M | 0.06% | −11,092−20.5% | Reduced |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 43,386 | $1.89M | 0.04% | +1,426+3.4% | Added |
| Pensionfund Sabic | 44,000 | $1.91M | 0.40% | 00.0% | Unchanged |
| Texas Permanent School Fund | 44,719 | $1.94M | 0.02% | −3,248−6.8% | Reduced |
| Thrivent Financial for Lutherans | 44,814 | $1.95M | 0.00% | −15,704−25.9% | Reduced |
| Searle & Co. | 45,200 | $1.96M | 0.80% | 00.0% | Unchanged |
| Citadel Advisors LLC | 45,263 | $1.97M | 0.00% | −129,312−74.1% | Reduced |
| Schroder Investment Management Group | 45,702 | $1.99M | 0.00% | +6,698+17.2% | Added |
| Mackay Shields LLC | 46,058 | $2.00M | 0.02% | +1,536+3.4% | Added |
| National Asset Management, Inc. | 46,707 | $2.03M | 0.06% | −8,713−15.7% | Reduced |
| State of Tennessee, Treasury Department | 48,785 | $2.12M | 0.01% | −854,731−94.6% | Reduced |
| AlphaCrest Capital Management LLC | 49,221 | $2.14M | 0.11% | +5,815+13.4% | Added |
| Baird Financial Group, Inc. | 49,761 | $2.16M | 0.01% | −2,712−5.2% | Reduced |
| Utah Retirement Systems | 51,814 | $2.25M | 0.03% | −3,000−5.5% | Reduced |
| HNP Capital LLC | 51,972 | $2.26M | 0.57% | +2,187+4.4% | Added |
| Vident Investment Advisory, LLC | 52,435 | $2.28M | 0.07% | +42,758+441.9% | Added |
| Vectors Research Management, LLC | 52,823 | $2.29M | 0.54% | +3,038+6.1% | Added |
| Werlinich Asset Management, LLC | 52,840 | $2.30M | 1.86% | 00.0% | Unchanged |
| Advisory Services Network, LLC | 53,077 | $2.31M | 0.07% | −32,024−37.6% | Reduced |
| British Columbia Investment Management Corp | 53,352 | $2.32M | 0.01% | 00.0% | Unchanged |
| MML Investors Services, LLC | 53,863 | $2.34M | 0.02% | +2,969+5.8% | Added |
| SeaBridge Investment Advisors LLC | 54,039 | $2.35M | 0.77% | −531−1.0% | Reduced |
| D. E. Shaw & Co., Inc. | 54,566 | $2.37M | 0.00% | +54,566 | New |
| Agf Investments Inc. | 55,589 | $2.42M | 0.02% | +51,321+1,202.5% | Added |
| KBC Group NV | 55,709 | $2.42M | 0.01% | +20,037+56.2% | Added |
| Public Sector Pension Investment Board | 55,894 | $2.43M | 0.01% | +3,613+6.9% | Added |
| Madden Securities Corp | 57,290 | $2.49M | 1.35% | −1,867−3.2% | Reduced |
| Russell Investments Group, Ltd. | 57,954 | $2.52M | 0.00% | +79+0.1% | Added |
| Achmea Investment Management B.V. | 58,428 | $2.54M | 0.08% | +23,080+65.3% | Added |