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 6 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 |
|---|---|---|---|---|---|
| Donoghue Forlines LLC | 63,149 | $2.74M | 0.53% | +35,862+131.4% | Added |
| Metropolitan Life Insurance Co | 62,771 | $2.73M | 0.04% | −478−0.8% | Reduced |
| Vestcor Inc | 62,161 | $2.70M | 0.10% | −36,059−36.7% | Reduced |
| Peapack Gladstone Financial Corp | 60,523 | $2.63M | 0.05% | −8,732−12.6% | Reduced |
| G&S Capital LLC | 60,273 | $2.62M | 1.44% | +60,273 | New |
| HighTower Advisors, LLC | 60,132 | $2.61M | 0.01% | −2,612−4.2% | Reduced |
| Nepsis, Inc. | 59,790 | $2.60M | 0.82% | +59,790 | New |
| M&T Bank Corp | 59,627 | $2.59M | 0.01% | +877+1.5% | Added |
| Nissay Asset Management Corp | 58,561 | $2.54M | 0.02% | +2,772+5.0% | Added |
| Achmea Investment Management B.V. | 58,428 | $2.54M | 0.08% | +23,080+65.3% | Added |
| Russell Investments Group, Ltd. | 57,954 | $2.52M | 0.00% | +79+0.1% | Added |
| Madden Securities Corp | 57,290 | $2.49M | 1.35% | −1,867−3.2% | Reduced |
| Public Sector Pension Investment Board | 55,894 | $2.43M | 0.01% | +3,613+6.9% | Added |
| KBC Group NV | 55,709 | $2.42M | 0.01% | +20,037+56.2% | Added |
| Agf Investments Inc. | 55,589 | $2.42M | 0.02% | +51,321+1,202.5% | Added |
| D. E. Shaw & Co., Inc. | 54,566 | $2.37M | 0.00% | +54,566 | New |
| SeaBridge Investment Advisors LLC | 54,039 | $2.35M | 0.77% | −531−1.0% | Reduced |
| MML Investors Services, LLC | 53,863 | $2.34M | 0.02% | +2,969+5.8% | Added |
| British Columbia Investment Management Corp | 53,352 | $2.32M | 0.01% | 00.0% | Unchanged |
| Advisory Services Network, LLC | 53,077 | $2.31M | 0.07% | −32,024−37.6% | Reduced |
| Werlinich Asset Management, LLC | 52,840 | $2.30M | 1.86% | 00.0% | Unchanged |
| Vectors Research Management, LLC | 52,823 | $2.29M | 0.54% | +3,038+6.1% | Added |
| Vident Investment Advisory, LLC | 52,435 | $2.28M | 0.07% | +42,758+441.9% | Added |
| HNP Capital LLC | 51,972 | $2.26M | 0.57% | +2,187+4.4% | Added |
| Utah Retirement Systems | 51,814 | $2.25M | 0.03% | −3,000−5.5% | Reduced |
| Baird Financial Group, Inc. | 49,761 | $2.16M | 0.01% | −2,712−5.2% | Reduced |
| AlphaCrest Capital Management LLC | 49,221 | $2.14M | 0.11% | +5,815+13.4% | Added |
| State of Tennessee, Treasury Department | 48,785 | $2.12M | 0.01% | −854,731−94.6% | Reduced |
| National Asset Management, Inc. | 46,707 | $2.03M | 0.06% | −8,713−15.7% | Reduced |
| Mackay Shields LLC | 46,058 | $2.00M | 0.02% | +1,536+3.4% | Added |
| Schroder Investment Management Group | 45,702 | $1.99M | 0.00% | +6,698+17.2% | Added |
| Citadel Advisors LLC | 45,263 | $1.97M | 0.00% | −129,312−74.1% | Reduced |
| Searle & Co. | 45,200 | $1.96M | 0.80% | 00.0% | Unchanged |
| Thrivent Financial for Lutherans | 44,814 | $1.95M | 0.00% | −15,704−25.9% | Reduced |
| Texas Permanent School Fund | 44,719 | $1.94M | 0.02% | −3,248−6.8% | Reduced |
| Pensionfund Sabic | 44,000 | $1.91M | 0.40% | 00.0% | Unchanged |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 43,386 | $1.89M | 0.04% | +1,426+3.4% | Added |
| DuPont Capital Management Corp | 43,067 | $1.87M | 0.06% | −11,092−20.5% | Reduced |
| Pacitti Group Inc. | 42,863 | $1.86M | 1.16% | +6,971+19.4% | Added |
| DekaBank Deutsche Girozentrale | 41,895 | $1.86M | 0.01% | +10,782+34.7% | Added |
| 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 |
| Cetera Investment Advisers | 42,676 | $1.85M | 0.03% | −470−1.1% | Reduced |
| Eaton Vance Management | 50,678 | $1.85M | 0.00% | −2,985−5.6% | Reduced |
| Roberts Wealth Advisors, LLC | 42,212 | $1.83M | 0.73% | +42,212 | New |
| Sculati Wealth Management, LLC | 41,326 | $1.80M | 0.95% | +224+0.5% | Added |
| Hartford Investment Management Co | 41,267 | $1.79M | 0.05% | −3,287−7.4% | Reduced |
| Mercer Global Advisors Inc | 41,149 | $1.79M | 0.01% | +4,848+13.4% | Added |
| Ingalls & Snyder LLC | 41,018 | $1.78M | 0.08% | −500−1.2% | Reduced |
| IFM Investors Pty Ltd | 40,190 | $1.75M | 0.04% | −906−2.2% | Reduced |
| DnB Asset Management AS | 39,916 | $1.73M | 0.01% | +1,657+4.3% | Added |
| AE Wealth Management LLC | 39,816 | $1.73M | 0.01% | +2,838+7.7% | Added |
| Shell Asset Management Co | 39,738 | $1.73M | 0.04% | +3,939+11.0% | Added |
| Mathes Company, Inc. | 39,150 | $1.70M | 0.63% | +39,150 | New |
| Avenir Corp | 39,130 | $1.70M | 0.14% | 00.0% | Unchanged |
| D.A. Davidson & Co. | 38,493 | $1.67M | 0.02% | +21,641+128.4% | Added |
| Public Employees Retirement Association of Colorado | 38,491 | $1.67M | 0.01% | 00.0% | Unchanged |
| Mutual of America Capital Management LLC | 37,978 | $1.65M | 0.02% | +288+0.8% | Added |
| Jupiter Asset Management Ltd | 37,912 | $1.65M | 0.02% | +11,590+44.0% | Added |
| Loomis Sayles & Co L P | 36,601 | $1.59M | 0.00% | −1,713−4.5% | Reduced |
| Virtus ETF Advisers LLC | 36,284 | $1.58M | 0.69% | −3,810−9.5% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 36,274 | $1.58M | 0.02% | +99+0.3% | Added |
| Ensign Peak Advisors, Inc | 36,206 | $1.57M | 0.00% | −12,788−26.1% | Reduced |
| Two Sigma Advisers, LP | 36,100 | $1.57M | 0.00% | −18,800−34.2% | Reduced |
| RB Capital Management, LLC | 36,069 | $1.57M | 0.59% | +662+1.9% | Added |
| Banque Cantonale Vaudoise | 36,057 | $1.57M | 0.07% | −10,527−22.6% | Reduced |
| Sippican Capital Advisors | 35,962 | $1.56M | 1.35% | −560−1.5% | Reduced |
| Horizon Investments, LLC | 35,864 | $1.56M | 0.05% | −8,312−18.8% | Reduced |
| 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 |
| 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 |
| AQR Capital Management LLC | 34,643 | $1.50M | 0.00% | +17,931+107.3% | Added |
| Kavar Capital Partners Group, LLC | 34,298 | $1.49M | 0.34% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 34,253 | $1.49M | 0.00% | −28,213−45.2% | Reduced |
| CoreFirst Bank & Trust | 34,080 | $1.48M | 1.03% | −5,800−14.5% | Reduced |
| Madison Asset Management, LLC | 33,622 | $1.46M | 0.02% | +1,400+4.3% | Added |
| Alps Advisors Inc | 33,418 | $1.45M | 0.01% | 00.0% | Unchanged |
| Holderness Investments Co | 33,271 | $1.45M | 0.48% | −305−0.9% | 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 |
| Ancora Advisors, LLC | 31,421 | $1.36M | 0.04% | −996−3.1% | Reduced |
| Dumont & Blake Investment Advisors LLC | 30,967 | $1.35M | 0.39% | −140.0% | Reduced |
| Norinchukin Bank, The | 30,911 | $1.34M | 0.02% | +1,929+6.7% | Added |
| Jane Street Group, LLC | 30,881 | $1.34M | 0.00% | −16,714−35.1% | Reduced |
| Gotham Asset Management, LLC | 30,555 | $1.33M | 0.05% | +11,578+61.0% | Added |
| Profund Advisors LLC | 30,421 | $1.32M | 0.04% | +18,262+150.2% | 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 |
| Teamwork Financial Advisors, LLC | 30,072 | $1.31M | 0.26% | +23+0.1% | Added |
| Monument Capital Management | 30,043 | $1.30M | 0.44% | +388+1.3% | Added |
| GWM Advisors LLC | 29,426 | $1.28M | 0.03% | +14,154+92.7% | Added |
| Quadrature Capital Ltd | 29,126 | $1.26M | 0.05% | +718+2.5% | Added |
| RFG Advisory, LLC | 28,842 | $1.25M | 0.10% | −4,074−12.4% | Reduced |
| Eqis Capital Management, Inc. | 28,517 | $1.24M | 0.09% | +28,517 | New |
| Hudson Portfolio Management LLC | 28,505 | $1.24M | 1.14% | −970−3.3% | Reduced |
| EAM Global Investors LLC | 28,208 | $1.23M | 0.29% | +28,208 | New |
| Cubic Asset Management, LLC | 28,005 | $1.22M | 0.30% | 00.0% | Unchanged |
| Richard P Slaughter Associates Inc | 27,851 | $1.21M | 0.48% | −2,152−7.2% | Reduced |