Security record · archived quarter
IRM
Iron Mountain Incorporated · Real Estate · REIT - Specialty
161Tracked holders
+4Δ holders
173.50MShares held
$17.71BReported value
+10New positions
−7Exits
Momentum inputs (comparable managers):
holder breadth +2.5% ·
share flow +1.0% ·
net new positions +1.9%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 3 | 0 | 97.02K | $10.17M | n/a | −1 |
| Q2 2026 | 157 | 0 | 179.85M | $22.72B | +6 | −7 |
| Q1 2026 | 161 | +4 | 173.50M | $17.71B | +10 | −7 |
| Q4 2025 | 156 | +1 | 203.32M | $16.87B | +2 | n/a |
| Q3 2025 | 19 | 0 | 127.27M | $12.98B | n/a | −1 |
| Q2 2025 | 17 | -2 | 121.35M | $12.46B | n/a | −2 |
| Q1 2025 | 16 | 0 | 38.25M | $3.31B | +2 | −2 |
| Q4 2024 | 16 | +4 | 36.36M | $3.83B | +4 | n/a |
| Q3 2024 | 11 | +1 | 19.71M | $2.34B | +2 | −1 |
| Q2 2024 | 10 | n/a | 19.98M | $1.79B | n/a | n/a |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 33.02M | +0.3% | $3.37B | 0.1% | ▲ Add | 4 | SEC ↗ ×21 |
| 2 | Vanguard Capital Management Llc | 18.76M | n/a | $1.92B | 0.0% | n/c | 1 | SEC ↗ |
| 3 | State Street Global Advisors ✦ (passive) | 17.55M | +3.9% | $1.81B | 0.1% | ▲ Add | 6 | SEC ↗ |
| 4 | Geode Capital Management ✦ (passive) | 8.49M | +2.3% | $863.70M | 0.1% | ▲ Add | 8 | SEC ↗ ×2 |
| 5 | Fidelity (FMR) ✦ | 7.48M | -6.3% | $764.46M | 0.0% | ▼ Trim | 4 | SEC ↗ ×5 |
| 6 | Morgan Stanley ✦ | 4.65M | +29.3% | $475.18M | 0.0% | ▲ Add | 3 | SEC ↗ ×15 |
| 7 | Principal Financial Group Inc | 4.57M | +8.5% | $466.38M | 0.2% | ▲ Add | 2 | SEC ↗ ×3 |
| 8 | Dimensional Fund Advisors Lp | 4.55M | +2.8% | $464.93M | 0.1% | ▲ Add | 2 | SEC ↗ ×5 |
| 9 | Northern Trust Corp | 4.15M | -0.1% | $423.93M | 0.1% | ▼ Trim | 2 | SEC ↗ ×11 |
| 10 | Charles Schwab Investment… | 4.01M | +3.4% | $409.89M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 11 | Invesco Ltd. | 3.92M | -11.2% | $400.54M | 0.0% | ▼ Trim | 2 | SEC ↗ ×15 |
| 12 | Legal & General Group Plc | 3.14M | -6.6% | $320.22M | 0.1% | ▼ Trim | 2 | SEC ↗ ×3 |
| 13 | Daiwa Securities Group Inc. | 3.11M | -15.0% | $317.39M | 0.9% | ▼ Trim | 2 | SEC ↗ ×2 |
| 14 | Deutsche Bank Ag\ | 3.09M | +21.6% | $315.83M | 0.1% | ▲ Add | 2 | SEC ↗ ×13 |
| 15 | Prudential Financial Inc | 2.42M | +4.6% | $246.78M | 0.3% | ▲ Add | 2 | SEC ↗ ×3 |
| 16 | Goldman Sachs Group ✦ | 2.22M | +45.3% | $226.41M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 17 | Nuveen, LLC | 2.07M | -2.8% | $211.27M | 0.1% | ▼ Trim | 2 | SEC ↗ ×3 |
| 18 | JPMorgan Chase ✦ | 2.12M | +10.1% | $207.24M | 0.0% | ▲ Add | 3 | SEC ↗ ×16 |
| 19 | Capital World Investors ✦ | 1.87M | -11.8% | $190.71M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 20 | Ameriprise Financial Inc | 1.85M | +6.1% | $189.08M | 0.0% | ▲ Add | 2 | SEC ↗ ×7 |
| 21 | AQR Capital Management ✦ | 1.85M | +100.0% | $183.07M | 0.1% | ▲ Add | 8 | SEC ↗ ×10 |
| 22 | Bank of New York Mellon Corp | 1.62M | -3.6% | $165.96M | 0.0% | ▼ Trim | 2 | SEC ↗ ×17 |
| 23 | Russell Investments Group, Ltd. | 1.46M | +3.5% | $148.41M | 0.2% | ▲ Add | 2 | SEC ↗ ×14 |
| 24 | Royal Bank Of Canada | 1.41M | +9.7% | $144.09M | 0.0% | ▲ Add | 2 | SEC ↗ ×10 |
| 25 | Bank Of America Corp /De/ | 1.40M | -7.3% | $142.93M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 26 | Hsbc Holdings Plc | 1.27M | -39.7% | $130.01M | 0.1% | ▼ Trim | 2 | SEC ↗ ×6 |
| 27 | Amundi | 1.09M | -18.1% | $111.49M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 28 | Sei Investments Co | 974.79K | -4.9% | $99.57M | 0.1% | ▼ Trim | 2 | SEC ↗ ×2 |
| 29 | Sumitomo Mitsui Trust Group, Inc. | 933.72K | +3.0% | $95.37M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 30 | Mitsubishi UFJ Asset Management… | 908.37K | +8.2% | $92.78M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 31 | Swiss National Bank | 867.46K | +7.2% | $88.60M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 32 | Pictet Asset Management Holding SA | 864.74K | -62.3% | $88.25M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 33 | CIBC Bancorp USA Inc. | 828.79K | n/a | $84.60M | 0.1% | n/c | 1 | SEC ↗ ×3 |
| 34 | American Century Companies Inc | 815.79K | +106.1% | $83.33M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | UBS Group AG | 801.43K | +0.7% | $81.86M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 36 | Jane Street Group, Llc | 707.44K | New | $72.26M | 0.1% | New | 1 | SEC ↗ ×2 |
| 37 | Barclays Plc | 673.77K | -7.6% | $68.82M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 38 | Wells Fargo & Company/Mn | 658.45K | +3.3% | $67.25M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 39 | LPL Financial LLC | 621.24K | -2.1% | $63.45M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 40 | T. Rowe Price ✦ | 601.58K | -0.9% | $61.45M | 0.0% | ▼ Trim | 8 | SEC ↗ ×2 |
| 41 | Universal- Beteiligungs- und… | 590.50K | -5.6% | $60.28M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 42 | Adage Capital Partners ✦ | 590.05K | -10.2% | $60.27M | 0.1% | ▼ Trim | 8 | SEC ↗ |
| 43 | Nomura Asset Management… | 586.88K | +596.8% | $59.94M | 0.1% | ▲ Add | 2 | SEC ↗ ×2 |
| 44 | Rhumbline Advisers | 578.54K | -2.0% | $59.09M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 45 | Nomura Asset Management Co Ltd | 563.34K | +3.5% | $57.54M | 0.1% | ▲ Add | 2 | SEC ↗ ×2 |
| 46 | Asset Management One Co., Ltd. | 547.47K | -1.5% | $55.92M | 0.2% | ▼ Trim | 2 | SEC ↗ |
| 47 | Bamco Inc /Ny/ | 525.27K | New | $53.65M | 0.2% | New | 1 | SEC ↗ |
| 48 | Bnp Paribas Financial Markets | 508.51K | -9.6% | $51.94M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 49 | California Public Employees… | 502.46K | -2.2% | $51.32M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 50 | Alliancebernstein L.P. | 565.25K | +3.8% | $46.89M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 51 | National Pension Service | 429.39K | -15.6% | $43.86M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 52 | California State Teachers… | 422.87K | -2.6% | $43.19M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 53 | Bank Of Montreal /Can/ | 406.01K | -7.0% | $41.47M | 0.0% | ▼ Trim | 2 | SEC ↗ ×9 |
| 54 | Rockefeller Capital Management L.P. | 389.14K | -3.7% | $39.75M | 0.1% | ▼ Trim | 2 | SEC ↗ ×5 |
| 55 | Point72 Asset Management ✦ | 377.62K | -52.2% | $38.57M | 0.1% | ▼ Trim | 7 | SEC ↗ |
| 56 | Citadel Advisors ✦ | 374.95K | -66.5% | $38.30M | 0.0% | ▼ Trim | 7 | SEC ↗ ×2 |
| 57 | Millennium Management ✦ | 374.46K | -23.4% | $38.25M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 58 | Aberdeen Group plc | 371.21K | +1.7% | $37.92M | 0.1% | ▲ Add | 2 | SEC ↗ ×3 |
| 59 | Neuberger Berman Group LLC | 360.75K | -16.4% | $36.85M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 60 | Wellington Management ✦ | 347.92K | +234.1% | $35.54M | 0.0% | ▲ Add | 8 | SEC ↗ ×4 |
| 61 | Quantinno Capital Management LP | 322.02K | +92.7% | $32.89M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 62 | Citigroup Inc | 315.63K | -0.9% | $32.24M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 63 | Ensign Peak Advisors, Inc | 297.33K | +298.5% | $30.37M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 64 | Raymond James Financial Inc | 295.13K | -19.4% | $30.14M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 65 | Aviva Plc | 263.20K | +2.8% | $26.88M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 66 | State Board Of Administration Of… | 262.51K | 0.0% | $26.81M | 0.1% | Held | 2 | SEC ↗ |
| 67 | Swedbank AB | 260.33K | -8.6% | $26.59M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 68 | Cetera Investment Advisers | 260.04K | +4.6% | $26.56M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 69 | Stifel Financial Corp | 255.35K | +12.4% | $26.08M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 70 | DZ BANK AG Deutsche Zentral… | 251.53K | -49.3% | $25.69M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 71 | Victory Capital Management Inc | 238.19K | +19.7% | $24.33M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 72 | Blair William & Co/Il | 225.25K | -5.5% | $23.01M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 73 | Envestnet Asset Management Inc | 224.85K | +43.4% | $22.97M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 74 | Healthcare Of Ontario Pension Plan… | 214.89K | +1739.0% | $21.95M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 75 | Federated Hermes, Inc. | 214.13K | +44.5% | $21.87M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 76 | Corient Private Wealth LP | 212.32K | -55.2% | $21.66M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 77 | Captrust Financial Advisors | 211.69K | -17.0% | $21.61M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 78 | Focus Partners Wealth | 207.53K | -4.8% | $21.23M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 79 | Zurcher Kantonalbank (Zurich… | 198.80K | -3.2% | $20.31M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 80 | BROOKFIELD Corp /ON/ | 188.25K | +31.4% | $19.23M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 81 | New York State Common Retirement… | 184.07K | 0.0% | $18.80M | 0.0% | Held | 2 | SEC ↗ |
| 82 | Td Asset Management Inc | 181.28K | +0.5% | $18.52M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 83 | Two Sigma Investments ✦ | 179.20K | -38.2% | $18.30M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 84 | State Of Wisconsin Investment Board | 176.52K | +1.9% | $18.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 85 | Manufacturers Life Insurance… | 173.47K | -3.6% | $17.72M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 86 | Cibc World Market Inc. | 168.42K | -19.0% | $17.20M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 87 | Pacer Advisors, Inc. | 167.17K | -25.2% | $17.07M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 88 | Danske Bank A/S | 164.16K | +1.1% | $16.77M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 89 | Commonwealth Equity Services, Llc | 156.66K | -6.0% | $16.00M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 90 | FIL Ltd | 150.73K | +289.4% | $15.40M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 91 | Franklin Resources Inc | 147.98K | +16.5% | $15.11M | 0.0% | ▲ Add | 2 | SEC ↗ ×8 |
| 92 | Chevy Chase Trust Holdings, LLC | 145.74K | -2.8% | $14.89M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 93 | Royal London Asset Management Ltd | 142.72K | -0.5% | $14.58M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 94 | Creative Planning | 131.68K | +4.4% | $13.45M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 95 | Toronto Dominion Bank | 129.53K | -25.3% | $13.23M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 96 | Mariner, LLC | 129.02K | +103.7% | $13.18M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 97 | Balyasny Asset Management L.P. | 128.69K | -37.8% | $13.14M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 98 | Hrt Financial Lp | 128.34K | New | $13.11M | 0.0% | New | 1 | SEC ↗ |
| 99 | BNP Paribas Asset Management… | 128.03K | -24.8% | $13.08M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 100 | Korea Investment CORP | 120.05K | -4.2% | $12.26M | 0.0% | ▼ Trim | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Jane Street Group, Llc | $72.26M | 0.1% |
| Bamco Inc /Ny/ | $53.65M | 0.2% |
| Hrt Financial Lp | $13.11M | 0.0% |
Exited
| Norges Bank | $368.89M | was 0.0% |
| Canada Pension Plan… | $7.31M | was 0.0% |
| Man Group plc | $4.76M | was 0.0% |
| Connor, Clark & Lunn… | $3.27M | was 0.0% |
| IMC-Chicago, LLC | $1.80M | was 0.0% |
| D. E. Shaw & Co. | $477,460 | was 0.0% |
| Capstone Investment Advisors… | $323,588 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1,078 holders, 250.54M shares, $23.29B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Sep 01
Meaney William L
Officer, Director · 89 sh · $10,324
Sep 01
Meaney William L
Officer, Director · 11.33K sh · $1.29M
Sep 01
Meaney William L
Officer, Director · 20.95K sh · $2.39M
Sep 01
Meaney William L
Officer, Director · 6.10K sh · $701,615
Sep 01
McIntosh Greg W
Officer · 5.00K sh · $578,000
Sep 01
Kidd Mark
Officer · 6.00K sh · $693,600
Aug 07
Meaney William L
Officer, Director · 18.78K sh · $2.27M
Aug 07
Meaney William L
Officer, Director · 16.79K sh · $2.05M
Aug 07
Meaney William L
Officer, Director · 2.91K sh · $357,080
Aug 07
Kidd Mark
Officer · 6.00K sh · $736,200
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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