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Disclosery

IRM IRON MTN INC DEL

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REIT (common), issuer CIK 1020569

989 managers (1,014 13F filers) reported a position in IRM shares at 2025-12-31, 257,267,304 shares in all. 72 filers opened a position and 106 filers sold out during the quarter.

Managers
989
13F filers
1,014
New
72
Added
326
Reduced
408
Sold out
106
Shares held by filers
257,267,304

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Azimuth Capital Investment Management L…71,985$5.97M0.21%+2,65913F-HRTimeline
CIBC Asset Management Inc71,901$5.96M0.01%+29,11013F-HRTimeline
INTACT INVESTMENT MANAGEMENT INC.in group INTACT INVESTMENT MANAGEMENT …71,600$5.94M0.17%+36,40013F-HRTimelineGroup
FORSTA AP-FONDEN70,900$5.88M0.04%013F-HRTimeline
New Age Alpha Advisors, LLC69,891$5.8M0.25%-2,25213F-HRTimeline
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …67,928$5.64M<0.01%-50913F-HRTimelineGroup
Wealthfront Advisers LLC67,439$5.59M0.01%-6,76213F-HRTimeline
ProShare Advisors LLC66,548$5.52M0.01%+4,68213F-HRTimeline
LEE DANNER & BASS INC65,208$5.41M0.39%+22,62513F-HRTimeline
MML INVESTORS SERVICES, LLC65,167$5.41M0.01%-1,74013F-HRTimeline
Raiffeisen Bank International AGin group Raiffeisen Bank International…64,516$5.38M0.07%+9,84913F-HRTimelineGroup
USS Investment Management Ltd64,572$5.35M0.02%+4,73213F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
PFA Pension, Forsikringsaktieselskab63,474$5.29M0.02%13F-HRTimeline
WOODSTOCK CORP63,717$5.29M0.45%+66013F-HRTimeline
Mariner, LLCin group Mariner, LLC63,335$5.26M0.01%+16,38113F-HRTimelineGroup
IEQ CAPITAL, LLC63,064$5.23M0.02%+59,96313F-HRTimeline
Swiss Life Asset Management Ltdin group Swiss Life Asset Management L…61,348$5.09M0.03%+5,94013F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…61,194$5.08M<0.01%-3,86013F-HRTimelineGroup
Candriam S.C.A.61,143$5.07M0.03%+2,03713F-HR/ATimeline
ASR Vermogensbeheer N.V.60,759$5.04M0.06%-12,41713F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC58,350$4.84M<0.01%-4,27513F-HRTimelineGroup
PEAPACK GLADSTONE FINANCIAL CORP57,698$4.79M0.06%-1,87513F-HRTimeline
Man Group plcin group Man Group plc57,346$4.76M0.01%+45,19513F-HRTimelineGroup
Pensionfund PDNgroup of 2 filers holding57,300$4.75M+700Timeline
PensionDanmark Pensionsforsikringsaktie…57,150$4.74M0.04%13F-HRTimeline
VAN LANSCHOT KEMPEN INVESTMENT MANAGEME…56,078$4.65M0.04%-10,48113F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…54,584$4.64M0.01%+5,56513F-HRTimeline
Hennion & Walsh Asset Management, Inc.55,764$4.63M0.16%-3,45313F-HRTimeline
AMALGAMATED BANK54,985$4.56M0.03%-1,11313F-HRTimeline
Skandinaviska Enskilda Banken AB (publ)54,151$4.49M0.02%-76213F-HRTimeline
REAVES W H & CO INC53,900$4.47M0.08%new13F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP53,683$4.45M<0.01%-96,15613F-HRTimelineGroup
BRITISH COLUMBIA INVESTMENT MANAGEMENT …52,269$4.34M0.02%+9,86813F-HRTimeline
Werlinich Asset Management, LLC51,907$4.33M2.13%+9513F-HRTimeline
NIA IMPACT ADVISORS, LLC51,974$4.31M1.45%-1,19313F-HRTimeline
FJARDE AP-FONDEN /FOURTH SWEDISH NATION…51,326$4.26M0.04%new13F-HRTimeline
First National Trust Co51,263$4.25M0.14%+2413F-HRTimeline
QRG CAPITAL MANAGEMENT, INC.50,921$4.22M0.05%-12,55313F-HRTimeline
Woodline Partners LP50,353$4.18M0.02%+11,39513F-HRTimeline
Federation des caisses Desjardins du Qu…50,087$4.15M0.02%+4,90313F-HRTimeline
XPONANCE LLC48,894$4.06M0.03%+2,71013F-HRTimeline
Advisors Asset Management, Inc.48,865$4.05M0.07%-11,10713F-HR/ATimeline
Utah Retirement Systems48,479$4.02M0.04%013F-HRTimeline
Ethic Inc.48,277$4M0.06%-43513F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC48,012$3.98M0.01%+9,82513F-HRTimelineGroup
SORA INVESTORS LLC47,345$3.93M0.34%-52,97413F-HRTimeline
RB Capital Management, LLC47,216$3.92M0.79%+47713F-HRTimeline
Dana Investment Advisors, Inc.47,137$3.91M0.11%-98,40413F-HRTimeline
BURNEY CO/46,647$3.87M0.12%-2,95613F-HRTimeline
THOMPSON SIEGEL & WALMSLEY LLC46,300$3.84M0.06%-40,10013F-HRTimeline
Royal Fund Management, LLC46,030$3.82M0.35%+32,33513F-HRTimeline
TWINBEECH CAPITAL LP45,900$3.81M0.27%new13F-HRTimeline
Baird Financial Group, Inc.in group Baird Financial Group, Inc.45,891$3.81M0.01%-74713F-HRTimelineGroup
YOUSIF CAPITAL MANAGEMENT, LLC41,206$3.81M0.04%-4,65113F-HRTimeline
Police & Firemen's Retirement System of…44,950$3.73M0.03%-2,28413F-HRTimeline
New York Life Investment Management LLCin group New York Life Investment Mana…43,058$3.57M0.03%-11613F-HRTimelineGroup
Steward Partners Investment Advisory, L…42,875$3.56M0.02%+2,52613F-HRTimeline
Moors & Cabot, Inc.42,429$3.52M0.15%-1,78013F-HRTimeline
HOLDERNESS INVESTMENTS CO40,724$3.38M0.69%-69213F-HRTimeline
Trinity Legacy Partners, LLC39,506$3.28M0.75%+81813F-HRTimeline
Connor, Clark & Lunn Investment Managem…39,394$3.27M0.01%+12,27713F-HRTimeline
WealthTrust Axiom LLC39,347$3.26M0.84%-3,01113F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC38,822$3.22M0.01%-31,50713F-HRTimelineGroup
Rakuten Investment Management, Inc.in group Rakuten Group, Inc.38,874$3.21M0.01%+8,29613F-HRTimelineGroup
FIL Ltdin group FIL Ltd38,714$3.21M<0.01%+34,44013F-HRTimelineGroup
Gotham Asset Management, LLC38,547$3.2M0.01%-45,37713F-HRTimeline
Rafferty Asset Management, LLC38,219$3.17M0.01%-1,49513F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson38,032$3.15M<0.01%+58813F-HRTimelineGroup
Ranch Capital Advisors Inc.37,639$3.15M1.16%+89313F-HRTimeline
SPIRIT OF AMERICA MANAGEMENT CORP/NY37,850$3.14M0.67%-1,10013F-HRTimeline
Vectors Research Management, LLC37,625$3.12M0.95%-3,96213F-HRTimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP36,944$3.06M<0.01%-7,97413F-HRTimelineGroup
American Trust Investment Advisors, LLC36,624$3.04M1.62%+29413F-HRTimeline
Fieldview Capital Management, LLC36,518$3.03M0.51%+6,18713F-HRTimeline
Venture Visionary Partners LLC35,762$2.97M0.1%+2,58213F-HRTimeline
Allianz Asset Management GmbHin group Allianz SE35,364$2.93M<0.01%-7,91013F-HRTimelineGroup
Pathstone Holdings, LLCin group Pathstone Holdings, LLC34,770$2.89M0.01%-49213F-HRTimelineGroup
Waverly Advisors, LLC34,422$2.86M0.02%+43313F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …33,891$2.82M<0.01%-77,89013F-HRTimelineGroup
OREGON PUBLIC EMPLOYEES RETIREMENT FUND33,789$2.8M0.04%013F-HRTimeline
OP Asset Management Ltd32,917$2.73M0.03%+28313F-HR/ATimeline
MACKENZIE FINANCIAL CORP32,751$2.72M<0.01%+1,95313F-HRTimeline
D.A. DAVIDSON & CO.32,649$2.71M0.02%+2,77913F-HRTimeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC32,448$2.69M0.01%-4,65613F-HRTimeline
Smithfield Trust Co32,179$2.67M0.12%-24813F-HRTimeline
Norinchukin Bank, Thein group Norinchukin Bank, The31,811$2.64M0.03%+71913F-HRTimelineGroup
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…31,737$2.63M0.03%-27713F-HRTimelineGroup
Knights of Columbus Asset Advisors LLC31,649$2.63M0.15%+1,84713F-HRTimeline
Prana Capital Management, LP31,092$2.58M0.09%+20,73213F-HRTimeline
One Capital Management, LLC30,505$2.53M0.08%-1,15213F-HRTimeline
Uniplan Investment Counsel, Inc.30,327$2.52M0.25%new13F-HR/ATimeline
Buckland Partners Management Co LLC30,000$2.51M1.39%13F-HRTimeline
Tredje AP-fonden30,081$2.5M0.02%-1,20613F-HRTimeline
Cyndeo Wealth Partners, LLC29,850$2.48M0.13%-4,37813F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC28,651$2.38M<0.01%+19,60113F-HRTimelineGroup
DUMONT & BLAKE INVESTMENT ADVISORS LLC28,597$2.37M0.57%-1,29913F-HRTimeline
Siemens Fonds Invest GmbH28,370$2.36M0.13%-10,58813F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…28,336$2.35M0.01%013F-HRTimeline
Heritage Trust Co27,806$2.31M0.23%+6,65213F-HRTimeline
COURIER CAPITAL LLC27,610$2.29M0.13%-3,06113F-HRTimeline
Aurora Investment Counsel27,420$2.27M1.2%+1,24313F-HRTimeline
Sage Capital Management, LLC27,210$2.26M1.04%-1,99513F-HRTimeline
Independent Advisor Alliance26,767$2.22M0.05%+6113F-HRTimeline
B. Metzler seel. Sohn & Co. AGin group B. Metzler seel. Sohn & Co. AG26,499$2.2M0.02%-3,13613F-HRTimelineGroup
FIFTH THIRD BANK, NATIONAL ASSOCIATIONgroup of 2 filers holding26,381$2.19M+1,183Timeline
AGF MANAGEMENT LTDin group AGF MANAGEMENT LTD26,236$2.18M0.01%+4,05113F-HRTimelineGroup
Kentucky Retirement Systemsgroup of 2 filers holding26,141$2.17M0Timeline
Lido Advisors, LLCin group Lido Advisors, LLC21,215$2.14M0.01%+71413F-HRTimelineGroup
SHELTON CAPITAL MANAGEMENT25,663$2.13M0.04%013F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.group of 2 filers holding25,497$2.11M-271Timeline
PFG Investments, LLC25,306$2.1M0.1%+1,39013F-HRTimeline
NewEdge Advisors, LLC25,126$2.08M0.01%-2,94613F-HRTimeline
Investment Management Corp of Ontario24,989$2.07M0.03%+11,08013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\24,427$2.03M<0.01%-1,78313F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd24,272$2.01M0.05%new13F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC23,832$1.98M0.03%013F-HRTimelineGroup
Pasadena Private Wealth, LLC23,564$1.95M0.27%new13F-HRTimeline
INCEPTIONR LLC23,512$1.95M0.54%+10,78713F-HRTimeline
WESTPAC BANKING CORPin group WESTPAC BANKING CORP23,370$1.94M0.12%+4,91413F-HRTimelineGroup
Sippican Capital Advisors23,277$1.93M1.24%-25513F-HRTimeline
Nepsis Inc.23,088$1.92M0.59%-85413F-HRTimeline
Capital Investment Advisors, LLC23,074$1.91M0.03%-15313F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP23,018$1.91M<0.01%+4,94313F-HRTimelineGroup
TEACHERS RETIREMENT SYSTEM OF THE STATE…22,954$1.9M0.01%013F-HRTimeline
CoreFirst Bank & Trust22,839$1.89M1.02%-1,24013F-HRTimeline
Investor's Fiduciary Advisor Network, L…22,723$1.88M0.4%-1,66213F-HRTimeline
Avanza Fonder AB22,699$1.88M0.05%013F-HRTimeline
STOCK YARDS BANK & TRUST CO22,467$1.86M0.06%-58013F-HRTimeline
ALLSTATE CORPin group ALLSTATE CORP22,427$1.86M0.03%+11,49213F-HRTimelineGroup
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC21,523$1.86M0.03%+1213F-HRTimelineGroup
HighPoint Advisor Group LLC22,402$1.86M0.04%+5,97913F-HRTimeline
BENJAMIN EDWARDS INCin group BENJAMIN EDWARDS INC22,382$1.86M0.02%-6613F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL22,190$1.84M0.01%new13F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC22,048$1.83M0.04%-40613F-HRTimelineGroup
F/m Investments LLC22,020$1.83M0.07%-1,08613F-HRTimeline
AG2R LA MONDIALE GESTION D'ACTIFS21,856$1.81M0.08%+5,51813F-HRTimeline
IMC-Chicago, LLC21,647$1.8M0.03%+7,03613F-HRTimeline
CWM, LLCin group CWM, LLC21,611$1.79M<0.01%+9,87213F-HRTimelineGroup
KCM INVESTMENT ADVISORS LLC21,310$1.77M0.06%-1713F-HRTimeline
Fiduciary Trust Coin group Fiduciary Trust Co21,238$1.76M0.02%-8513F-HRTimelineGroup
Erste Asset Management GmbHin group Erste Asset Management GmbH20,900$1.73M0.01%-1,48113F-HRTimelineGroup
PRAXIS INVESTMENT MANAGEMENT INC20,717$1.72M0.1%013F-HRTimeline
Merit Financial Group, LLC20,670$1.71M0.01%+74013F-HRTimeline
GeoWealth Management, LLC20,396$1.69M0.06%-3,02313F-HRTimeline
Meridian Wealth Advisors, LLC20,314$1.69M0.23%new13F-HRTimeline
GABLES CAPITAL MANAGEMENT INC.20,292$1.68M0.71%-50013F-HRTimeline
Tema ETFs LLC20,099$1.67M0.13%-2,29613F-HRTimeline
Naviter Wealth, LLC19,794$1.66M0.22%-3,21113F-HRTimeline
INSPIRE TRUST CO, N.A.20,000$1.66M0.27%013F-HRTimeline
CORRADO ADVISORS, LLC19,856$1.65M0.83%+11013F-HRTimeline
MASTERINVEST Kapitalanlage GmbH19,717$1.64M0.16%013F-HRTimeline
CASCADE INVESTMENT GROUP, INC.19,231$1.6M1.06%-1,25513F-HRTimeline
DoubleLine ETF Adviser LP19,075$1.58M0.47%+69213F-HRTimeline
Kentucky Trust Co19,065$1.58M0.84%-20513F-HRTimeline
FLPUTNAM INVESTMENT MANAGEMENT CO18,706$1.55M0.02%-4013F-HRTimeline
RFG Advisory, LLC18,531$1.54M0.03%-23013F-HRTimeline
HORIZON KINETICS ASSET MANAGEMENT LLC18,405$1.53M0.02%-1,05013F-HRTimeline
Osmosis Investment Management UK Ltd17,530$1.47M0.04%13F-HRTimeline
Sterling Capital Management LLC17,394$1.44M0.02%-74613F-HRTimeline
Trust Investment Advisors17,311$1.44M0.76%-1713F-HRTimeline
MAI Capital Management17,290$1.43M0.01%+8,62513F-HRTimeline
PARK AVENUE SECURITIES LLCin group PARK AVENUE SECURITIES LLC17,260$1.43M0.01%-2,26013F-HRTimelineGroup
HARTFORD INVESTMENT MANAGEMENT CO17,080$1.42M0.04%-22013F-HRTimeline
Madison Asset Management, LLCin group Madison Asset Management, LLC17,052$1.41M0.02%-90813F-HRTimelineGroup
CAPITAL FINANCIAL GROUP INC\CO\ /ADV16,995$1.41M0.79%13F-HRTimeline
Claro Advisors Inc.16,515$1.37M0.19%+30213F-HRTimeline
J.W. COLE ADVISORS, INC.30,857$1.36M0.03%-2,73913F-HRTimeline
IHT Wealth Management, LLC16,329$1.35M0.03%+3913F-HRTimeline
ABN AMRO INVESTMENT SOLUTIONSin group ABN AMRO INVESTMENT SOLUTIONS16,217$1.35M0.02%+11,37313F-HRTimelineGroup
COMMERCE BANKin group COMMERCE BANK16,184$1.34M0.01%-713F-HRTimelineGroup
Crossmark Global Holdings, Inc.16,028$1.33M0.02%+1,00913F-HRTimeline
BROWN ADVISORY INCin group BROWN ADVISORY INC16,019$1.33M<0.01%+17613F-HRTimelineGroup
KING LUTHER CAPITAL MANAGEMENT CORP15,929$1.32M0.01%-28113F-HRTimeline
Robeco Institutional Asset Management B…in group Robeco Institutional Asset Ma…15,697$1.3M<0.01%+97213F-HRTimelineGroup
Community Bank of Raymore15,241$1.26M0.86%+95013F-HRTimeline
STEVENS CAPITAL MANAGEMENT LP15,214$1.26M0.44%new13F-HRTimeline
One Charles Private Wealth Services, LLC15,174$1.26M0.33%-19213F-HRTimeline
LDR Capital Management LLC15,160$1.26M1.74%+4,08713F-HRTimeline
Louisiana State Employees Retirement Sy…15,100$1.25M0.02%-40013F-HRTimeline
Summit Trail Advisors, LLC14,981$1.25M0.02%+21613F-HRTimeline
Snowden Capital Advisors LLC14,729$1.23M0.03%-16013F-HRTimeline
Gulf International Bank (UK) Ltd14,849$1.23M0.04%+15913F-HRTimeline
Maryland State Retirement & Pension Sys…14,259$1.18M0.02%013F-HRTimeline
BI Asset Management Fondsmaeglerselskab…in group BI Asset Management Fondsmaeg…14,149$1.17M0.01%-28013F-HRTimelineGroup
MOODY LYNN LIEBERSON & WALKER, LLC14,044$1.16M0.06%-52513F-HRTimeline
ROMAN BUTLER FULLERTON & CO12,382$1.16M0.3%-46813F-HRTimeline
World Investment Advisors13,880$1.15M0.02%+2,68613F-HR/ATimeline
NEW MEXICO EDUCATIONAL RETIREMENT BOARD13,840$1.15M0.03%+50013F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC13,742$1.14M<0.01%+6,54313F-HRTimelineGroup
NewEdge Wealth, LLC13,702$1.14M0.01%+1,81813F-HRTimeline
Metis Global Partners, LLC13,530$1.12M0.03%-84013F-HRTimeline
Texas Yale Capital Corp.13,505$1.12M0.03%+8,35013F-HRTimeline
Crescent Grove Advisors, LLC13,255$1.11M0.11%013F-HRTimeline
Focus Financial Network, Inc.13,201$1.11M0.04%+20313F-HRTimeline
Global Retirement Partners, LLC13,109$1.09M0.02%+6,07313F-HRTimeline
Daiichi Life Insurance Co., Ltd.in group Daiichi Life Insurance Co., L…13,089$1.09M0.03%013F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
HIGHLINE WEALTH PARTNERS LLC12,891$1.07M0.3%-2,30813F-HRTimeline
Chesley Taft & Associates LLC12,737$1.06M0.04%+1,26113F-HRTimeline
E. Ohman J:or Asset Management AB12,703$1.05M0.02%013F-HRTimeline
OSSIAM12,649$1.05M0.02%+6,34213F-HRTimeline