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 |
|---|---|---|---|---|---|
| Morgan Stanley | 4,195,161 | $182.3M | 0.02% | +1,139,861+37.3% | Added |
| Dimensional Fund Advisors LP | 4,222,054 | $183.5M | 0.06% | −44,123−1.0% | Reduced |
| Invesco Ltd. | 4,257,624 | $185.0M | 0.05% | −619,758−12.7% | Reduced |
| Northern Trust Corp | 4,258,268 | $185.0M | 0.03% | +594,092+16.2% | Added |
| Geode Capital Management, LLC | 6,330,235 | $275.5M | 0.04% | +231,564+3.8% | Added |
| State Street Corp | 13,837,484 | $609.6M | 0.03% | +380,178+2.8% | Added |
| BlackRock Inc. | 22,870,617 | $993.7M | 0.03% | −263,923−1.1% | Reduced |
| Capital World Investors | 32,710,171 | $1.42B | 0.24% | −2,7900.0% | Reduced |
| Vanguard Group Inc | 48,634,068 | $2.11B | 0.05% | +129,949+0.3% | Added |
| Gerber Kawasaki Wealth & Investment Management | 4 | – | – | −7,039−99.9% | Reduced |
| Westside Investment Management, Inc. | 26 | – | – | 00.0% | Unchanged |
| Seeyond | 0 | $0 | 0.00% | −6,842−100.0% | Sold out |
| Maplelane Capital, LLC | 0 | $0 | 0.00% | −212,453−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −77,149−100.0% | Sold out |
| Concorde Asset Management, LLC | 0 | $0 | 0.00% | −40,405−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −37,365−100.0% | Sold out |
| Tibra Equities Europe Ltd | 0 | $0 | 0.00% | −24,574−100.0% | Sold out |
| Alethea Capital Management, LLC | 0 | $0 | 0.00% | −24,456−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −20,083−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −15,981−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −15,649−100.0% | Sold out |
| Cohen & Steers, Inc. | 0 | $0 | 0.00% | −14,348−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −13,081−100.0% | Sold out |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −10,860−100.0% | Sold out |
| Nomura Holdings Inc | 0 | $0 | 0.00% | −10,070−100.0% | Sold out |
| Southport Management, L.L.C. | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| CenterStar Asset Management, LLC | 0 | $0 | 0.00% | – | Sold out |
| BP PLC | 0 | $0 | 0.00% | −8,023−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −8,013−100.0% | Sold out |
| Inscription Capital, LLC | 0 | $0 | 0.00% | −7,110−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −6,624−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −6,059−100.0% | Sold out |
| Financial Advocates Investment Management | 0 | $0 | 0.00% | −5,797−100.0% | Sold out |
| Caxton Associates LP | 0 | $0 | 0.00% | −5,699−100.0% | Sold out |
| Level Four Advisory Services, LLC | 0 | $0 | 0.00% | −5,537−100.0% | Sold out |
| Ergoteles LLC | 0 | $0 | 0.00% | −5,193−100.0% | Sold out |
| CCG Wealth Management, LLC | 0 | $0 | 0.00% | −5,130−100.0% | Sold out |
| Quantamental Technologies LLC | 0 | $0 | 0.00% | −5,060−100.0% | Sold out |
| Coldstream Capital Management Inc | 0 | $0 | 0.00% | −5,038−100.0% | Sold out |
| Stevens Capital Management LP | 0 | $0 | 0.00% | −5,025−100.0% | Sold out |
| Stratos Wealth Partners, LTD. | 0 | $0 | 0.00% | −5,006−100.0% | Sold out |
| Wealthsource Partners, LLC | 0 | $0 | 0.00% | −5,005−100.0% | Sold out |
| Cambria Investment Management, L.P. | 0 | $0 | 0.00% | −4,806−100.0% | Sold out |
| Brighton Jones LLC | 0 | $0 | 0.00% | −4,722−100.0% | Sold out |
| Trust Co of Vermont | 0 | $0 | 0.00% | −3,120−100.0% | Sold out |
| Credit Agricole S A | 0 | $0 | 0.00% | −1,920−100.0% | Sold out |
| Enterprise Financial Services Corp | 0 | $0 | 0.00% | −1,408−100.0% | Sold out |
| WealthShield Partners, LLC | 0 | $0 | 0.00% | −1,409−100.0% | Sold out |
| West Branch Capital LLC | 0 | $0 | 0.00% | −1,400−100.0% | Sold out |
| Red Door Wealth Management, LLC | 0 | $0 | 0.00% | −399−100.0% | Sold out |
| CVA Family Office, LLC | 0 | $0 | 0.00% | −145−100.0% | Sold out |
| Stonebridge Capital Advisors LLC | 0 | $0 | 0.00% | −36−100.0% | Sold out |
| Standard Family Office LLC | 0 | $0 | 0.00% | −29−100.0% | Sold out |
| Pictet Asset Management Ltd | – | – | – | – | Not filed |
| QS Investors, LLC | – | – | – | – | Not filed |
| Cipher Capital LP | – | – | – | – | Not filed |
| Castleview Partners, LLC | – | – | – | – | Not filed |
| CWM, LLC | – | – | – | – | Not filed |
| FormulaFolio Investments, LLC | – | – | – | – | Not filed |
| First Horizon Corp | – | – | – | – | Not filed |