IRM · Company research
Iron Mountain Inc. (IRM): Ownership & Institutional Holders
Reported institutional positions. Filing dates and sources matter.
RESEARCH CONTEXT
Understand the numbers
Reported institutional positions. Filing dates and sources matter. Use period, currency, units and source fields when interpreting values.
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Ownership & Institutional Holders data
Database-backed records only
| holder name | cik | period end | shares held | market value | ownership percent | shares change | shares change percent | filing date | data source |
|---|---|---|---|---|---|---|---|---|---|
| Park National Corporation | 805676 | Wed Sep 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3656 | 405633000 | — | — | — | Oct 5, 2026 | SEC_13F_HR |
| First Financial Corporation Common Stock | 714562 | Wed Sep 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1500 | 166425 | — | — | — | Oct 13, 2026 | SEC_13F_HR |
| First Financial Corporation | 714562 | Wed Sep 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1500 | 166425 | — | — | — | Oct 13, 2026 | SEC_13F_HR |
| Blue Sparrow, LLC /DE | 2104539 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 19130 | 2416310 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Janney Montgomery Scott LLC | 1329948 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 105090 | 13274 | — | — | — | Aug 5, 2026 | SEC_13F_DATASET |
| WOODSTOCK CORP | 1008877 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 65102 | 8223034 | — | — | — | Jul 13, 2026 | SEC_13F_DATASET |
| Bank of New Hampshire | 1870761 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 910 | 114942 | — | — | — | Jul 14, 2026 | SEC_13F_DATASET |
| SPIRIT OF AMERICA MANAGEMENT CORP/NY | 1041283 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 32500 | 4105075 | — | — | — | Jul 14, 2026 | SEC_13F_DATASET |
| Westside Investment Management, Inc. | 1538383 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 13 | 1642 | — | — | — | Jul 27, 2026 | SEC_13F_DATASET |
| Kentucky Trust Co | 2054100 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 17465 | 2206004 | — | — | — | Jul 10, 2026 | SEC_13F_DATASET |
| ADELL HARRIMAN & CARPENTER INC | 1134152 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 316465 | 39972769 | — | — | — | Aug 4, 2026 | SEC_13F_DATASET |
| E. Ohman J:or Asset Management AB | 2009396 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 11103 | 1402420 | — | — | — | Jul 10, 2026 | SEC_13F_DATASET |
| THURSTON, SPRINGER, MILLER, HERD & TITAK, INC. | 319933 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10 | 1263 | — | — | — | Jul 8, 2026 | SEC_13F_DATASET |
| KLP KAPITALFORVALTNING AS | 1717443 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 201716 | 25626888 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| ATLAS CAPITAL ADVISORS INC. | 1434165 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3575 | 365150 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY | 714142 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 6039 | 763 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Archer Investment Corp | 1803804 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5800 | 732598 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
| FIRST FINANCIAL CORP /IN/ | 714562 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1500 | 189465 | — | — | — | Jul 7, 2026 | SEC_13F_DATASET |
| GF FUND MANAGEMENT CO. LTD. | 2057060 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 4051 | 511682 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| ALLSTATE CORP | 899051 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 32177 | 4064277 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| IAG Wealth Partners, LLC | 1827261 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 236 | 29809 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| Strengthening Families & Communities, LLC | 1921196 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3 | 379 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| FJ Capital Management LLC | 1599170 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3814 | 481746 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Mathes Company, Inc. | 1389223 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 7400 | 935 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Versant Capital Management, Inc | 1735057 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2253 | 284576 | — | — | — | Jul 2, 2026 | SEC_13F_DATASET |
| Azimuth Capital Investment Management LLC | 1942364 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 75180 | 9495986 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Atlantic Private Wealth, LLC | 1893143 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 154 | 19453 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| CX Institutional | 1737089 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5489 | 693 | — | — | — | Jul 2, 2026 | SEC_13F_DATASET |
| ADAMS DIVERSIFIED EQUITY FUND, INC. | 2230 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 102900 | 12997299 | — | — | — | Jul 22, 2026 | SEC_13F_DATASET |
| Sumitomo Mitsui Trust Group, Inc. | 1475365 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 896560 | 113244494 | — | — | — | Jul 30, 2026 | SEC_13F_DATASET |
| MetLife Investment Management, LLC | 1529735 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 76417 | 9652231 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| SOUTHERN MICHIGAN BANK & TRUST | 1173227 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 286 | 36125 | — | — | — | Jul 21, 2026 | SEC_13F_DATASET |
| Fifth Third Wealth Advisors LLC | 1899030 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3713 | 468989 | — | — | — | Jul 17, 2026 | SEC_13F_DATASET |
| O'Neil Global Advisors, Inc. | 1861159 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 113164 | 14293745 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| Vision Retirement, LLC | 2069023 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 247 | 31199 | — | — | — | Jul 21, 2026 | SEC_13F_DATASET |
| RICHARDSON FINANCIAL SERVICES INC. | 2012303 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1266 | 159910 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| Harvest Fund Management Co., Ltd | 1694126 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1023 | 129 | — | — | — | Aug 20, 2026 | SEC_13F_DATASET |
| NEW YORK STATE COMMON RETIREMENT FUND | 810265 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 182874 | 23098815 | — | — | — | Jul 29, 2026 | SEC_13F_DATASET |
| Synergy Investment Management, LLC | 2053786 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 285 | 34414 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| One Capital Management, LLC | 1606588 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 30034 | 3067692 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| FOSTER & MOTLEY INC | 1163902 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3213 | 406 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| Corsicana & Co. | 1869923 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 450 | 56840 | — | — | — | Jul 24, 2026 | SEC_13F_DATASET |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | 1007280 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 422586 | 53376838 | — | — | — | Aug 17, 2026 | SEC_13F_DATASET |
| FARMERS & MERCHANTS INVESTMENTS INC | 1259969 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 206 | 26020 | — | — | — | Jul 20, 2026 | SEC_13F_DATASET |
| NBT BANK, N.A. | 898413 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 17 | 2147 | — | — | — | Jul 29, 2026 | SEC_13F_DATASET |
| MeadowBrook Investment Advisors LLC | 1308290 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 428 | 54061 | — | — | — | Jul 20, 2026 | SEC_13F_DATASET |
| Fayez Sarofim & Co | 937729 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2360 | 298092 | — | — | — | Aug 17, 2026 | SEC_13F_DATASET |
| Dorsey & Whitney Trust CO LLC | 1384042 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 864 | 109132 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Bank of New York Mellon Corp | 1390777 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 749452 | 94663282 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| LOOMIS SAYLES & CO L P | 312348 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 313 | 39535 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| BOKF, NA | 9634 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 12 | 1516 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| Plato Investment Management Ltd | 1984475 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1725 | 216614 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| IMA Advisory Services, Inc. | 1455495 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2804 | 356596 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| AMERIPRISE FINANCIAL INC | 820027 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1409961 | 179983419 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Canton Hathaway, LLC | 1755785 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 499 | 63029 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| CBRE INVESTMENT MANAGEMENT LISTED REAL ASSETS LLC | 1033984 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1014533 | 128145663 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| First Command Advisory Services, Inc. | 1727336 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 237 | 30103 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| DNB Asset Management AS | 1456670 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 67481 | 8523525 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Busey Bank | 1427202 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1638 | 206896 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| CENTERSQUARE INVESTMENT MANAGEMENT LLC | 1725296 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2213874 | 279634425 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| CYBER HORNET ETFs LLC | 1818014 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 812 | 102564 | — | — | — | Aug 24, 2026 | SEC_13F_DATASET |
| AMERIFLEX GROUP, INC. | 2057637 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 7 | 884 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Sterling Capital Management LLC | 1329883 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 23532 | 2972327 | — | — | — | Jul 28, 2026 | SEC_13F_DATASET |
| Heritage Wealth Advisors | 1591122 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2222 | 280661 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Russell Investments Group, Ltd. | 1692234 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 462545 | 58424078 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| NCP Inc. | 2023709 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 400 | 50524 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| MOODY LYNN LIEBERSON & WALKER, LLC | 938592 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 14195 | 1792970 | — | — | — | Jul 20, 2026 | SEC_13F_DATASET |
| AGF MANAGEMENT LTD | 1003518 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 14122 | 1783750 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| Valeo Financial Advisors, LLC | 1722641 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1920 | 242562 | — | — | — | Jul 8, 2026 | SEC_13F_DATASET |
| SEGALL BRYANT & HAMILL, LLC | 1006378 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 12009 | 1516857 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| TUDOR INVESTMENT CORP ET AL | 923093 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 75389 | 9522385 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Mitsubishi UFJ Trust & Banking Corp | 1462160 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 119025 | 15034048 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| BAYBAN | 2110649 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 400 | 50524 | — | — | — | Jul 30, 2026 | SEC_13F_DATASET |
| CoreFirst Bank & Trust | 1845199 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 20544 | 2594913 | — | — | — | Aug 5, 2026 | SEC_13F_DATASET |
| Brookfield Corp /ON/ | 1001085 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5262 | 664643 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| NISA INVESTMENT ADVISORS, LLC | 937615 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 86069 | 10945540 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| Adelante Capital Management LLC | 1067926 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 325641 | 41131393 | — | — | — | Aug 17, 2026 | SEC_13F_DATASET |
| BECK MACK & OLIVER LLC | 10742 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1674 | 211443 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Ethic Inc. | 1780570 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 49180 | 6211866 | — | — | — | Jul 29, 2026 | SEC_13F_DATASET |
| WASHINGTON TRUST Co | 1079736 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 8586 | 1084483 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
Informational research only, not financial advice. Forecasts are uncertain and can be wrong.