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 2025
Institutional positions in Iron Mountain Inc as of Sep 30, 2025. 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
- 1,017
- −13 vs. Q2 2025
- Shares held
- 250.3M
- +5.90M (+2.4%) vs. Q2 2025
- Total value
- $25.5B
- +$450.7M (+1.8%) vs. Q2 2025
- New holders
- 75
- 370 more added
- Sold out
- 88
- 390 more reduced
15 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: 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 2025
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FIL Ltd | 4,274 | $435.7K | 0.00% | +163+4.0% | Added |
| BCO Wealth Management LLC | 4,275 | $435.8K | 0.29% | 00.0% | Unchanged |
| Profund Advisors LLC | 4,290 | $437.3K | 0.01% | −42−1.0% | Reduced |
| WealthBridge Capital Management, LLC | 4,311 | $439.4K | 0.10% | +27+0.6% | Added |
| Armstrong Advisory Group, Inc | 4,335 | $441.9K | 0.03% | 00.0% | Unchanged |
| Prestige Wealth Management Group LLC | 4,338 | $442.2K | 0.09% | +166+4.0% | Added |
| Ameliora Wealth Management Ltd. | 4,350 | $443.4K | 0.15% | 00.0% | Unchanged |
| Putney Financial Group LLC | 4,359 | $444.4K | 0.44% | −286−6.2% | Reduced |
| Quest Investment Management LLC | 4,421 | $450.7K | 0.05% | +7+0.2% | Added |
| RMB Capital Management, LLC | 4,421 | $452.9K | 0.01% | −432−8.9% | Reduced |
| Teamwork Financial Advisors, LLC | 4,469 | $455.6K | 0.05% | −7−0.2% | Reduced |
| Essex Savings Bank | 4,495 | $458.2K | 0.10% | 00.0% | Unchanged |
| Hilltop Holdings Inc. | 4,518 | $460.5K | 0.02% | −40−0.9% | Reduced |
| NBC Securities, Inc. | 4,519 | $460.7K | 0.04% | −15−0.3% | Reduced |
| Bryn Mawr Trust Co | 4,520 | $460.8K | 0.01% | −2,521−35.8% | Reduced |
| Hancock Whitney Corp | 4,529 | $461.7K | 0.01% | −299−6.2% | Reduced |
| Welch Group, LLC | 4,531 | $461.9K | 0.02% | 00.0% | Unchanged |
| Horizon Investments, LLC | 4,536 | $462.4K | 0.01% | −414−8.4% | Reduced |
| Aspen Investment Management Inc | 4,539 | $463.0K | 0.18% | +4+0.1% | Added |
| Fisher Asset Management, LLC | 4,597 | $468.7K | 0.00% | −468−9.2% | Reduced |
| Davis R M Inc | 4,618 | $470.8K | 0.01% | −200−4.2% | Reduced |
| GM Advisory Group, Inc. | 4,685 | $477.6K | 0.02% | −2,495−34.7% | Reduced |
| High Net Worth Advisory Group LLC | 4,692 | $478.3K | 0.12% | 00.0% | Unchanged |
| Cynosure Management, LLC | 4,699 | $479.0K | 0.05% | 00.0% | Unchanged |
| TD Private Client Wealth LLC | 4,755 | $484.7K | 0.01% | −2,114−30.8% | Reduced |
| NorthRock Partners, LLC | 4,774 | $486.7K | 0.01% | −470−9.0% | Reduced |
| Augustine Asset Management Inc | 4,800 | $489.3K | 0.10% | −47−1.0% | Reduced |
| Canada Post Corp Registered Pension Plan | 4,887 | $490.4K | 0.02% | 00.0% | Unchanged |
| GF Fund Management Co. Ltd. | 4,841 | $493.5K | 0.01% | −340−6.6% | Reduced |
| Abn Amro Investment Solutions | 4,844 | $493.8K | 0.01% | −607−11.1% | Reduced |
| Integrity Alliance, LLC. | 4,874 | $496.9K | 0.02% | +1,929+65.5% | Added |
| Envestnet Portfolio Solutions, Inc. | 4,888 | $498.3K | 0.00% | −3,255−40.0% | Reduced |
| Point72 Asia (Singapore) Pte. Ltd. | 4,916 | $501.1K | 0.08% | −21,391−81.3% | Reduced |
| Perfromance Wealth Partners, LLC | 4,939 | $503.5K | 0.01% | −68−1.4% | Reduced |
| Linscomb & Williams, Inc. | 4,969 | $506.5K | 0.02% | −51−1.0% | Reduced |
| NorthStar Asset Management LLC | 5,015 | $511.2K | 0.24% | 00.0% | Unchanged |
| Signal Advisors Wealth, LLC | 5,047 | $514.5K | 0.05% | +5,047 | New |
| Mechanics Bank Trust Department | 5,093 | $519.2K | 0.07% | +610+13.6% | Added |
| Kingsview Wealth Management, LLC | 5,103 | $520.2K | 0.01% | +33+0.7% | Added |
| Koshinski Asset Management, Inc. | 5,108 | $520.7K | 0.04% | +98+2.0% | Added |
| Stratos Wealth Partners, LTD. | 5,147 | $524.8K | 0.01% | +7+0.1% | Added |
| Arete Wealth Advisors, LLC | 5,150 | $525.0K | 0.03% | 00.0% | Unchanged |
| Texas Yale Capital Corp. | 5,155 | $525.5K | 0.02% | 00.0% | Unchanged |
| Kapstone Financial Advisors LLC | 5,195 | $529.6K | 0.25% | −597−10.3% | Reduced |
| Smith Asset Management Co., LLC | 5,215 | $531.6K | 0.45% | 00.0% | Unchanged |
| Valued Retirements, Inc. | 5,190 | $532.3K | 0.60% | 00.0% | Unchanged |
| Atalanta Sosnoff Capital, LLC | 5,225 | $532.6K | 0.01% | −109−2.0% | Reduced |
| Financial Management Professionals, Inc. | 5,273 | $541.7K | 0.06% | +33+0.6% | Added |
| Estabrook Capital Management | 5,337 | $544.1K | 0.08% | 00.0% | Unchanged |
| Advisors Capital Management, LLC | 5,416 | $552.1K | 0.01% | +989+22.3% | Added |
| Chicago Partners Investment Group LLC | 5,342 | $555.9K | 0.01% | +90+1.7% | Added |
| Concurrent Investment Advisors, LLC | 5,522 | $562.9K | 0.01% | +65+1.2% | Added |
| Garden State Investment Advisory Services LLC | 5,505 | $565.3K | 0.14% | −27−0.5% | Reduced |
| Principal Securities, Inc. | 5,554 | $566.2K | 0.01% | −599−9.7% | Reduced |
| Washington Trust Co | 5,586 | $569.4K | 0.02% | 00.0% | Unchanged |
| MUFG Securities EMEA plc | 5,653 | $576.3K | 0.01% | +4,788+553.5% | Added |
| Fidelis Capital Partners, LLC | 5,713 | $582.4K | 0.05% | +13+0.2% | Added |
| Huntington National Bank | 5,713 | $582.4K | 0.00% | −4−0.1% | Reduced |
| Signaturefd, LLC | 5,715 | $582.6K | 0.01% | −1,330−18.9% | Reduced |
| EWG Elevate Inc. | 5,722 | $583.3K | 0.18% | 00.0% | Unchanged |
| West Wealth Group, LLC | 5,551 | $587.0K | 0.13% | +51+0.9% | Added |
| Somerset Trust Co | 5,785 | $589.7K | 0.18% | +64+1.1% | Added |
| Resources Investment Advisors, LLC. | 5,794 | $590.6K | 0.01% | −414−6.7% | Reduced |
| Pinnacle Family Advisors, LLC | 5,826 | $593.9K | 0.26% | +225+4.0% | Added |
| Wolverine Trading, LLC | 5,919 | $594.0K | 0.01% | +5,919 | New |
| TD Waterhouse Canada Inc. | 5,802 | $594.4K | 0.00% | −741−11.3% | Reduced |
| Ellevest, Inc. | 5,837 | $595.0K | 0.08% | −679−10.4% | Reduced |
| Sheets Smith Wealth Management | 5,910 | $602.5K | 0.07% | 00.0% | Unchanged |
| Prospera Financial Services Inc | 5,920 | $603.7K | 0.01% | +1,428+31.8% | Added |
| Jackson Square Capital, LLC | 5,999 | $611.5K | 0.13% | +5,999 | New |
| Callan Family Office, LLC | 6,066 | $618.4K | 0.02% | −1,509−19.9% | Reduced |
| Monument Capital Management | 6,239 | $636.0K | 0.16% | −315−4.8% | Reduced |
| Ossiam | 6,307 | $642.9K | 0.01% | −8,966−58.7% | Reduced |
| Campbell & CO Investment Adviser LLC | 6,320 | $644.3K | 0.05% | +1,023+19.3% | Added |
| Gerber Kawasaki Wealth & Investment Management | 6,332 | $645.5K | 0.02% | +49+0.8% | Added |
| Columbia Asset Management | 6,392 | $651.6K | 0.12% | 00.0% | Unchanged |
| Caption Management, LLC | 6,400 | $652.4K | 0.04% | +6,400 | New |
| Golden State Equity Partners | 6,435 | $656.0K | 0.11% | +89+1.4% | Added |
| Farther Finance Advisors, LLC | 6,470 | $659.6K | 0.01% | +1,088+20.2% | Added |
| GAMMA Investing LLC | 6,497 | $662.3K | 0.04% | +1,021+18.6% | Added |
| Two Sigma Advisers, LP | 6,500 | $662.6K | 0.00% | −29,600−82.0% | Reduced |
| Equitable Holdings, Inc. | 6,505 | $663.1K | 0.00% | −917−12.4% | Reduced |
| Twin Tree Management, LP | 6,576 | $670.4K | 0.03% | +6,576 | New |
| Quadrant Capital Group LLC | 6,604 | $673.2K | 0.02% | −8−0.1% | Reduced |
| Symphony Financial, Ltd. Co. | 6,532 | $677.9K | 0.08% | −930−12.5% | Reduced |
| U.S. Capital Wealth Advisors, LLC | 6,682 | $681.2K | 0.02% | −180−2.6% | Reduced |
| Susquehanna Fundamental Investments, LLC | 6,739 | $687.0K | 0.03% | 00.0% | Unchanged |
| Checchi Capital Advisers, LLC | 6,949 | $708.4K | 0.05% | −1,427−17.0% | Reduced |
| Fiduciary Group LLC | 7,000 | $713.6K | 0.06% | 00.0% | Unchanged |
| Centaurus Financial, Inc. | 7,017 | $715.0K | 0.03% | +449+6.8% | Added |
| Global Retirement Partners, LLC | 7,036 | $717.3K | 0.02% | +450+6.8% | Added |
| We Are One Seven, LLC | 7,069 | $720.6K | 0.02% | +2,285+47.8% | Added |
| Outlook Wealth Advisors, LLC | 7,120 | $725.8K | 0.18% | −127−1.8% | Reduced |
| TBH Global Asset Management, LLC | 7,154 | $729.3K | 0.14% | 00.0% | Unchanged |
| Ballentine Partners, LLC | 7,160 | $729.9K | 0.01% | +271+3.9% | Added |
| Toroso Investments, LLC | 7,199 | $733.9K | 0.00% | −5,593−43.7% | Reduced |
| Badgley Phelps Wealth Managers, LLC | 7,245 | $738.6K | 0.02% | 00.0% | Unchanged |
| Two Sigma Securities, LLC | 7,256 | $739.7K | 0.11% | −1,542−17.5% | Reduced |
| Mindset Wealth Management, LLC | 7,364 | $750.7K | 0.20% | −129−1.7% | Reduced |
| Prime Capital Investment Advisors, LLC | 7,379 | $752.2K | 0.01% | −131−1.7% | Reduced |