DaveManuel.com · Institutional Ownership · Who Owns It
IRON MTN INC DEL (IRM)
Institutional ownership reported to the SEC as of Q2 2026, across 32 quarters.
1,184
Reporting holders
$33.0B
Reported value
86.4%
Of shares outstanding
0.5%
Calls
1.0%
Puts
+81
Holder change
Institutions report 257,288,684 shares against 297,702,812 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $4.2B | 33,570,910 | 0.06% | 8q | +1.7%+$69.4M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $3.2B | 25,568,944 | 0.15% | 2q | +2.2%+$69.9M |
| VANGUARD CAPITAL MANAGEMENT LLC | $2.4B | 18,953,705 | 0.05% | 2q | +1.0%+$24.6M |
| STATE STREET CORP | $2.2B | 17,634,044 | 0.07% | 31q | HELD |
| COHEN & STEERS, INC. | $1.5B | 12,019,735 | 2.40% | 19q | -25.7%-$524.1M |
| GEODE CAPITAL MANAGEMENT, LLC | $1.1B | 8,649,249 | 0.06% | 31q | +1.9%+$20.5M |
| FMR LLC | $994.4M | 7,872,365 | 0.04% | 31q | +5.2%+$49.0M |
| DIMENSIONAL FUND ADVISORS LP | $584.3M | 4,625,684 | 0.11% | 31q | +1.6%+$9.3M |
| MORGAN STANLEY | $559.2M | 4,426,922 | 0.03% | 35q | -4.8%-$28.5M |
| PRINCIPAL FINANCIAL GROUP INC | $552.4M | 4,373,424 | 0.27% | 31q | -4.2%-$24.3M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $538.5M | 4,263,487 | 0.07% | 31q | +6.2%+$31.6M |
| NORTHERN TRUST CORP | $533.4M | 4,222,967 | 0.06% | 31q | +1.7%+$9.2M |
| NORGES BANK | $532.4M | 4,214,697 | 0.05% | 32q | -5.2%-$29.4M |
| Invesco Ltd. | $513.5M | 4,065,649 | 0.04% | 31q | +3.7%+$18.2M |
| Legal & General Group Plc | $409.8M | 3,244,741 | 0.09% | 31q | +3.5%+$13.9M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $403.4M | 3,193,560 | 0.07% | 31q | +29674.0%+$402.0M |
| DEUTSCHE BANK AG\ | $385.1M | 3,049,079 | 0.11% | 34q | -1.4%-$5.4M |
| GOLDMAN SACHS GROUP INC | $356.5M | 2,822,732 | 0.03% | 31q | +27.3%+$76.6M |
| CENTERSQUARE INVESTMENT MANAGEMENT LLC | $293.5M | 2,323,974 | 2.51% | 14q | +0.6%+$1.8M |
| JPMORGAN CHASE & CO | $287.5M | 2,212,137 | 0.02% | 31q | +4.2%+$11.5M |
| Nuveen, LLC | $280.3M | 2,218,771 | 0.07% | 6q | +7.3%+$19.0M |
| AQR CAPITAL MANAGEMENT LLC | $266.5M | 2,127,095 | 0.09% | 31q | +15.2%+$35.2M |
| PRUDENTIAL FINANCIAL INC | $249.3M | 1,974,079 | 0.27% | 31q | -18.3%-$55.8M |
| Vontobel Holding Ltd. | $242.5M | 1,919,656 | 0.77% | 4q | -9.3%-$24.9M |
| Daiwa Securities Group Inc. | $235.1M | 1,861,547 | 0.46% | 31q | -40.1%-$157.4M |
| Select Equity Group, L.P. | $219.4M PUT | options only | 1.09% | 2q | OPTIONS |
| ROYAL BANK OF CANADA | $214.8M incl. $7.6M options CALL | 1,640,511 | 0.03% | 31q | +16.3%+$30.1M |
| AMERIPRISE FINANCIAL INC | $210.9M | 1,668,337 | 0.04% | 31q | -9.9%-$23.1M |
| VANGUARD FIDUCIARY TRUST CO | $209.5M | 1,658,635 | 0.05% | 2q | HELD |
| Bank of New York Mellon Corp | $202.1M | 1,600,078 | 0.03% | 31q | -1.5%-$3.1M |
| DUFF & PHELPS INVESTMENT MANAGEMENT CO | $183.8M | 1,455,435 | 1.73% | 12q | -7.6%-$15.1M |
| Russell Investments Group, Ltd. | $177.4M | 1,403,623 | 0.16% | 31q | -3.5%-$6.5M |
| HSBC HOLDINGS PLC | $170.3M | 1,347,871 | 0.07% | 31q | +5.9%+$9.5M |
| Contour Asset Management LLC | $161.0M | 1,274,684 | 3.81% | 6q | -11.8%-$21.5M |
| Capital World Investors | $153.7M | 1,217,169 | 0.02% | 31q | -34.8%-$82.1M |
| Amundi | $147.6M | 1,168,430 | 0.04% | 21q | +7.0%+$9.7M |
| AMERICAN CENTURY COMPANIES INC | $145.8M | 1,154,487 | 0.06% | 24q | +41.5%+$42.8M |
| BANK OF AMERICA CORP /DE/ | $141.3M | 1,118,827 | 0.01% | 31q | -20.0%-$35.4M |
| CBRE INVESTMENT MANAGEMENT LISTED REAL ASSETS LLC | $135.5M | 1,072,881 | 1.89% | 8q | -13.3%-$20.8M |
| Mitsubishi UFJ Asset Management Co., Ltd. | $124.1M | 982,596 | 0.07% | 31q | +8.2%+$9.4M |
| UBS Group AG | $116.5M incl. $960.0K options CALL | 915,101 | 0.01% | 31q | +14.2%+$14.5M |
| DekaBank Deutsche Girozentrale | $114.2M | 1,122,500 | 0.19% | 27q | HELD |
| Sumitomo Mitsui Trust Group, Inc. | $113.2M | 896,560 | 0.06% | 31q | -4.0%-$4.7M |
| Swiss National Bank | $106.0M | 839,061 | 0.06% | 31q | -3.3%-$3.6M |
| Pictet Asset Management Holding SA | $103.3M | 817,622 | 0.10% | 12q | -5.4%-$6.0M |
| CIBC Bancorp USA Inc. | $98.2M | 777,480 | 0.12% | 3q | -6.2%-$6.5M |
| BARCLAYS PLC | $93.9M | 743,343 | 0.02% | 31q | +10.3%+$8.8M |
| WELLS FARGO & COMPANY/MN | $92.1M incl. $8.5M options PUT | 662,157 | 0.01% | 31q | +0.6%+$515.1K |
| SEI INVESTMENTS CO | $88.1M | 697,737 | 0.08% | 31q | -28.4%-$35.0M |
| Aberdeen Group plc | $87.3M | 691,514 | 0.12% | 31q | +86.3%+$40.5M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $86.2M incl. $83.3M options CALL+PUT | 23,476 | 0.01% | 31q | -77.0%-$288.7M |
| APG Asset Management US Inc. | $85.8M | 703,912 | 0.60% | 9q | HELD |
| PGGM Investments | $85.3M | 675,093 | 2.10% | 14q | -50.7%-$87.8M |
| BNP PARIBAS FINANCIAL MARKETS | $81.9M | 648,227 | 0.03% | 31q | +27.5%+$17.6M |
| Vanguard Global Advisers, LLC | $81.1M | 641,901 | 0.04% | 2q | -0.9%-$741.9K |
| LPL Financial LLC | $80.9M | 640,383 | 0.02% | 31q | +3.1%+$2.4M |
| Welch & Forbes LLC | $80.8M | 639,322 | 0.98% | 31q | -2.0%-$1.6M |
| PRICE T ROWE ASSOCIATES INC /MD/ | $80.2M | 634,613 | 0.01% | 31q | +5.5%+$4.2M |
| CITADEL ADVISORS LLC | $79.4M incl. $36.1M options CALL+PUT | 343,168 | 0.01% | 31q | -8.5%-$7.4M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | $77.1M | 610,889 | 0.12% | 7q | +3.5%+$2.6M |
| Quantinno Capital Management LP | $74.6M | 590,647 | 0.09% | 11q | +83.4%+$33.9M |
| NOMURA ASSET MANAGEMENT CO LTD | $74.3M | 588,384 | 0.16% | 31q | +4.4%+$3.2M |
| JANE STREET GROUP, LLC | $73.3M incl. $23.2M options CALL+PUT | 396,541 | 0.01% | 30q | -43.9%-$57.4M |
| RHUMBLINE ADVISERS | $72.4M | 573,267 | 0.05% | 31q | -0.9%-$666.4K |
| VANGUARD ASSET MANAGEMENT, Ltd | $71.9M | 568,845 | 0.05% | 2q | +12.6%+$8.1M |
| RAYMOND JAMES FINANCIAL INC | $70.9M | 561,539 | 0.02% | 7q | +90.3%+$33.6M |
| Asset Management One Co., Ltd. | $70.1M | 554,607 | 0.18% | 31q | +1.3%+$901.0K |
| California Public Employees Retirement System | $70.0M | 553,872 | 0.04% | 31q | +10.2%+$6.5M |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | $69.7M | 552,190 | 0.10% | 3q | -5.9%-$4.4M |
| WORLDQUANT MILLENNIUM ADVISORS LLC | $67.8M | 537,162 | 0.23% | 6q | -2.0%-$1.4M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $67.6M | 535,152 | 0.09% | 31q | -9.3%-$6.9M |
| WELLINGTON MANAGEMENT GROUP LLP | $64.8M | 512,906 | 0.01% | 31q | +47.4%+$20.8M |
| Clark Capital Management Group, Inc. | $60.2M | 476,766 | 0.33% | 2q | +1.8%+$1.1M |
| DigitalBridge Group, Inc. | $57.7M | 457,126 | 3.46% | 2q | -9.3%-$5.9M |
| ALLIANCEBERNSTEIN L.P. | $57.5M | 562,711 | 0.02% | 31q | HELD |
| National Pension Service | $57.4M | 454,815 | 0.04% | 20q | +5.9%+$3.2M |
| BANK OF MONTREAL /CAN/ | $57.3M | 453,715 | 0.02% | 31q | +11.7%+$6.0M |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $56.1M | 443,901 | 0.08% | 10q | +106.6%+$28.9M |
| VIRGINIA RETIREMENT SYSTEMS ET Al | $55.8M | 441,803 | 0.33% | 6q | HELD |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $54.9M | 434,529 | 0.05% | 31q | +2.8%+$1.5M |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | $53.4M | 422,586 | 0.16% | 31q | HELD |
| CITIGROUP INC | $53.4M | 422,524 | 0.02% | 31q | +33.9%+$13.5M |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | $52.1M | 412,748 | 0.22% | new | NEW |
| Rockefeller Capital Management L.P. | $49.5M | 391,620 | 0.08% | 31q | +0.6%+$313.3K |
| Heitman Real Estate Securities LLC | $45.2M | 357,721 | 2.90% | 12q | +37.8%+$12.4M |
| CANADA LIFE ASSURANCE Co | $44.8M | 355,692 | 0.07% | 31q | +5.9%+$2.5M |
| Vanguard Investments Australia, Ltd. | $43.9M | 347,312 | 0.11% | 2q | +1.2%+$502.5K |
| Adelante Capital Management LLC | $41.1M | 325,641 | 2.70% | 14q | -8.8%-$4.0M |
| ADELL HARRIMAN & CARPENTER INC | $40.0M | 316,465 | 2.05% | 31q | HELD |
| BAMCO INC /NY/ | $39.2M | 310,721 | 0.06% | 2q | -40.8%-$27.1M |
| Robeco Institutional Asset Management B.V. | $37.6M | 297,899 | 0.05% | 36q | +1940.0%+$35.8M |
| TEACHER RETIREMENT SYSTEM OF TEXAS | $37.6M | 297,427 | 0.10% | 25q | -24.6%-$12.3M |
| Marble Harbor Investment Counsel, LLC | $37.3M | 295,533 | 3.79% | 31q | -1.6%-$624.1K |
| ACADIAN ASSET MANAGEMENT LLC | $36.9M | 292,064 | 0.04% | 5q | +72.9%+$15.5M |
| NEUBERGER BERMAN GROUP LLC | $36.7M | 290,384 | 0.02% | 31q | -19.5%-$8.9M |
| Swedbank AB | $36.3M | 287,064 | 0.03% | 21q | +10.3%+$3.4M |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | $36.2M | 286,428 | 0.18% | 31q | +41.6%+$10.6M |
| SG Americas Securities, LLC | $35.9M | 284,584 | 0.02% | new | NEW |
| MACQUARIE GROUP LTD | $34.9M | 275,969 | 0.15% | 32q | +2.0%+$676.1K |
| Border to Coast Pensions Partnership Ltd | $34.7M | 275,000 | 0.51% | 18q | -41.5%-$24.6M |
Showing the largest 100 of 1,184 reported holders.
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-08 | Meaney William L | President and CEO | Sold | 38,474 | $5.0M ×2 |
| 2026-06-01 | Meaney William L | President and CEO | Sold | 38,474 | $4.9M ×5 |
| 2026-07-01 | Meaney William L | President and CEO | Sold | 38,474 | $4.7M ×5 |
| 2026-08-07 | Meaney William L | President and CEO | Sold | 38,474 | $4.7M ×3 |
| 2026-09-01 | Meaney William L | President and CEO | Sold | 38,474 | $4.4M ×4 |
| 2026-10-01 | Meaney William L | President and CEO | Sold | 38,474 | $4.2M ×3 |
| 2026-08-06 | McIntosh Greg W | EVP, Chief Commercial Officer | Sold | 11,839 | $1.5M ×2 |
| 2026-05-21 | Borges Daniel | SVP & Chief Accounting Officer | Sold | 7,189 | $902.2K |
| 2026-05-08 | Kidd Mark | EVP, GM Data Centers & ALM | Sold | 6,000 | $767.5K |
| 2026-06-01 | Kidd Mark | EVP, GM Data Centers & ALM | Sold | 6,000 | $760.2K |
| 2026-07-01 | Kidd Mark | EVP, GM Data Centers & ALM | Sold | 6,000 | $753.7K |
| 2026-08-07 | Kidd Mark | EVP, GM Data Centers & ALM | Sold | 6,000 | $736.2K |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 403 | $1.2B | 10,731,275 | 33 | 136 | 106 | 0.0% |
| Q2 2026 | 1,184 | $33.0B | 257,288,684 | 142 | 396 | 350 | 1.6% |
| Q1 2026 | 1,103 | $26.3B | 253,301,403 | 164 | 366 | 329 | 1.5% |
| Q4 2025 | 1,017 | $21.6B | 258,578,087 | 69 | 305 | 384 | 0.9% |
| Q3 2025 | 1,025 | $26.0B | 252,743,717 | 67 | 331 | 362 | 0.8% |
| Q2 2025 | 1,053 | $26.1B | 251,286,809 | 113 | 362 | 334 | 1.1% |
| Q1 2025 | 1,002 | $21.4B | 245,380,887 | 78 | 308 | 380 | 1.6% |
| Q4 2024 | 1,077 | $25.4B | 237,609,179 | 71 | 307 | 390 | 1.5% |
| Q3 2024 | 1,071 | $29.6B | 244,883,942 | 150 | 283 | 391 | 2.0% |
| Q2 2024 | 984 | $22.7B | 250,155,101 | 99 | 295 | 350 | 1.3% |
| Q1 2024 | 953 | $20.0B | 247,027,632 | 109 | 281 | 314 | 1.3% |
| Q4 2023 | 908 | $17.0B | 239,560,785 | 98 | 255 | 324 | 1.1% |
| Q3 2023 | 842 | $13.9B | 229,851,471 | 81 | 263 | 294 | 1.4% |
| Q2 2023 | 824 | $13.3B | 228,308,482 | 79 | 264 | 278 | 2.2% |
| Q1 2023 | 799 | $12.5B | 231,638,178 | 69 | 272 | 249 | 2.0% |
| Q4 2022 | 787 | $12.0B | 236,120,595 | 64 | 263 | 268 | 2.0% |
| Q3 2022 | 727 | $49.7B | 1,126,237,861 | 58 | 263 | 222 | 0.4% |
| Q2 2022 | 755 | $54.1B | 1,106,719,640 | 69 | 268 | 240 | 0.4% |
| Q1 2022 | 769 | $56.0B | 1,004,939,786 | 83 | 270 | 254 | 0.5% |
| Q4 2021 | 748 | $57.0B | 1,083,376,908 | 80 | 237 | 229 | 0.7% |
| Q3 2021 | 707 | $54.6B | 1,251,442,722 | 62 | 251 | 227 | 0.3% |
| Q2 2021 | 688 | $45.2B | 1,061,756,743 | 110 | 225 | 204 | 0.5% |
| Q1 2021 | 620 | $47.7B | 1,283,237,671 | 74 | 225 | 204 | 0.4% |
| Q4 2020 | 607 | $40.9B | 1,381,539,825 | 70 | 225 | 169 | 0.3% |
| Q3 2020 | 591 | $36.2B | 1,346,965,908 | 71 | 234 | 175 | 0.3% |
| Q2 2020 | 565 | $31.9B | 1,215,182,176 | 86 | 188 | 181 | 0.6% |
| Q1 2020 | 537 | $25.6B | 1,071,537,539 | 52 | 211 | 169 | 0.3% |
| Q4 2019 | 575 | $29.8B | 931,549,206 | 67 | 217 | 139 | 0.5% |
| Q3 2019 | 519 | $32.3B | 990,932,740 | 60 | 199 | 145 | 0.6% |
| Q2 2019 | 518 | $18.9B | 596,295,470 | 70 | 199 | 151 | 1.1% |
| Q1 2019 | 536 | $26.0B | 729,680,341 | 88 | 191 | 141 | 0.5% |
| Q4 2018 | 482 | $21.5B | 662,107,507 | 10 | 11 | 11 | 0.4% |