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Disclosery

IRM IRON MTN INC DEL

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REIT (common), issuer CIK 1020569

994 managers (1,018 13F filers) reported a position in IRM shares at 2025-09-30, 250,293,686 shares in all. 67 filers opened a position and 88 filers sold out during the quarter.

Managers
994
13F filers
1,018
New
67
Added
370
Reduced
391
Sold out
88
Shares held by filers
250,293,686

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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
MML INVESTORS SERVICES, LLC66,907$6.82M0.02%-11,85713F-HRTimeline
VAN LANSCHOT KEMPEN INVESTMENT MANAGEME…66,559$6.79M0.06%-6,87413F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…65,054$6.63M<0.01%-33213F-HRTimelineGroup
Public Sector Pension Investment Board63,680$6.49M0.02%+3,00813F-HRTimeline
QRG CAPITAL MANAGEMENT, INC.63,474$6.47M0.08%-75,49813F-HRTimeline
WOODSTOCK CORP63,057$6.43M0.56%+7,67913F-HRTimeline
Lighthouse Investment Partners, LLCin group Lighthouse Investment Partner…63,000$6.42M0.23%+12,80013F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC62,625$6.38M0.01%-19,02513F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC62,416$6.36M0.01%+60,40713F-HRTimelineGroup
ProShare Advisors LLC61,866$6.31M0.01%+99613F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC61,291$6.25M0.01%-78,50013F-HRTimelineGroup
State of Tennessee, Department of Treas…60,669$6.18M0.02%-39,42813F-HRTimeline
Advisors Asset Management, Inc.59,972$6.11M0.1%-3,53913F-HR/ATimeline
USS Investment Management Ltd59,840$6.1M0.03%013F-HRTimeline
PEAPACK GLADSTONE FINANCIAL CORP59,573$6.07M0.08%+3,48813F-HRTimeline
Hennion & Walsh Asset Management, Inc.59,217$6.04M0.22%+88913F-HRTimeline
Candriam S.C.A.59,106$6.03M0.03%-12,61713F-HRTimeline
M&T Bank Corpin group M&T Bank Corp58,861$6M0.02%-27,46613F-HRTimelineGroup
DNB Asset Management ASin group DNB Asset Management AS56,983$5.81M0.02%+2,95113F-HRTimelineGroup
Pensionfund PDNgroup of 2 filers holding56,600$5.77M-1,200Timeline
AMALGAMATED BANK56,098$5.72M0.04%-97313F-HRTimeline
Swiss Life Asset Management Ltdin group Swiss Life Asset Management L…55,408$5.65M0.03%+8,82113F-HRTimelineGroup
Skandinaviska Enskilda Banken AB (publ)54,913$5.6M0.02%-4,08213F-HRTimeline
Raiffeisen Bank International AGin group Raiffeisen Bank International…54,667$5.49M0.07%+8,32713F-HRTimelineGroup
Korea Investment CORP53,549$5.46M0.01%-221,92113F-HRTimeline
NIA IMPACT ADVISORS, LLC53,167$5.42M1.76%+66513F-HRTimeline
Werlinich Asset Management, LLC51,812$5.28M2.62%013F-HRTimeline
First National Trust Co51,239$5.22M0.18%-3,46713F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…49,019$5.19M0.01%-1,23113F-HRTimeline
Vestcor Inc50,559$5.15M0.15%+16,34713F-HRTimeline
BURNEY CO/49,603$5.06M0.16%-17,20613F-HRTimeline
Ethic Inc.48,712$4.97M0.08%-4,95213F-HRTimeline
Utah Retirement Systems48,479$4.94M0.05%+43013F-HRTimeline
Police & Firemen's Retirement System of…47,234$4.82M0.04%+2,86513F-HRTimeline
Mariner, LLCin group Mariner, LLC46,954$4.79M0.01%+1,29913F-HRTimelineGroup
RB Capital Management, LLC46,739$4.76M0.99%+1,12013F-HRTimeline
Baird Financial Group, Inc.in group Baird Financial Group, Inc.46,638$4.75M0.01%-2,03213F-HRTimelineGroup
XPONANCE LLC46,184$4.71M0.04%+1713F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC45,857$4.67M0.05%-3,01713F-HRTimeline
Federation des caisses Desjardins du Qu…45,184$4.61M0.02%-1,46213F-HRTimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP44,918$4.58M0.01%+2,67613F-HRTimelineGroup
Moors & Cabot, Inc.44,209$4.51M0.2%-6,06513F-HRTimeline
Allianz Asset Management GmbHin group Allianz SE43,274$4.41M0.01%-1,91213F-HRTimelineGroup
New York Life Investment Management LLCin group New York Life Investment Mana…43,174$4.4M0.04%-1,07813F-HRTimelineGroup
CIBC Asset Management Inc42,791$4.36M0.01%+1,74413F-HRTimeline
LEE DANNER & BASS INC42,583$4.34M0.32%+88313F-HRTimeline
BRITISH COLUMBIA INVESTMENT MANAGEMENT …42,401$4.32M0.02%-3,81413F-HRTimeline
WealthTrust Axiom LLC42,358$4.32M1.16%-29113F-HRTimeline
Vectors Research Management, LLC41,587$4.24M1.34%+76713F-HRTimeline
HOLDERNESS INVESTMENTS CO41,416$4.22M0.86%-41213F-HRTimeline
Steward Partners Investment Advisory, L…40,349$4.11M0.02%+1,96413F-HRTimeline
Rafferty Asset Management, LLC39,714$4.05M0.01%+2,32413F-HRTimeline
Trinity Legacy Partners, LLC38,688$3.98M0.92%+22213F-HRTimeline
Woodline Partners LP38,958$3.97M0.02%+7,11913F-HRTimeline
Siemens Fonds Invest GmbH38,958$3.97M0.22%+7,01313F-HRTimeline
SPIRIT OF AMERICA MANAGEMENT CORP/NY38,950$3.97M0.8%-4,30013F-HRTimeline
Qube Research & Technologies Ltd38,654$3.94M0.01%-171,31613F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS38,638$3.94M0.02%-5,97013F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC38,187$3.89M0.01%+2,89513F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson37,444$3.82M<0.01%-16,69313F-HRTimelineGroup
O'SHAUGHNESSY ASSET MANAGEMENT, LLC37,104$3.78M0.02%+57813F-HRTimeline
Ranch Capital Advisors Inc.36,746$3.77M1.46%+1,49913F-HRTimeline
American Trust Investment Advisors, LLC36,330$3.7M1.91%-17,89013F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC35,262$3.6M0.01%-1,22613F-HRTimelineGroup
INTACT INVESTMENT MANAGEMENT INC.in group INTACT INVESTMENT MANAGEMENT …35,200$3.59M0.11%new13F-HRTimelineGroup
Cyndeo Wealth Partners, LLC34,228$3.49M0.19%+113F-HRTimeline
Waverly Advisors, LLC33,989$3.46M0.03%+3,52513F-HRTimeline
HOURGLASS CAPITAL, LLC33,860$3.45M0.78%-20013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND33,789$3.44M0.04%+8,32013F-HRTimeline
J.W. COLE ADVISORS, INC.33,596$3.42M0.07%+11,89313F-HRTimeline
Venture Visionary Partners LLC33,180$3.38M0.12%+19113F-HRTimeline
OP Asset Management Ltd32,634$3.33M0.04%+1,86113F-HR/ATimeline
Banque Cantonale Vaudoisein group Banque Cantonale Vaudoise32,564$3.32M0.12%-2,72913F-HRTimelineGroup
Smithfield Trust Co32,427$3.31M0.15%-14213F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…32,014$3.26M0.03%-1,81913F-HRTimelineGroup
One Capital Management, LLC31,657$3.23M0.1%-90613F-HRTimeline
Tredje AP-fonden31,287$3.19M0.03%+8,23013F-HRTimeline
Norinchukin Bank, Thein group Norinchukin Bank, The31,092$3.17M0.04%+49613F-HRTimelineGroup
MACKENZIE FINANCIAL CORP30,798$3.14M<0.01%+99013F-HRTimeline
COURIER CAPITAL LLC30,671$3.13M0.18%-24113F-HRTimeline
Fieldview Capital Management, LLC30,331$3.09M0.51%new13F-HRTimeline
Elo Mutual Pension Insurance Co30,150$3.07M0.05%+3,21713F-HRTimeline
DUMONT & BLAKE INVESTMENT ADVISORS LLC29,896$3.05M0.74%-33813F-HRTimeline
D.A. DAVIDSON & CO.29,870$3.05M0.02%+33813F-HRTimeline
Knights of Columbus Asset Advisors LLC29,802$3.04M0.17%-36,81913F-HRTimeline
B. Metzler seel. Sohn & Co. AGin group B. Metzler seel. Sohn & Co. AG29,635$3.02M0.03%013F-HRTimelineGroup
Sage Capital Management, LLC29,205$2.98M1.34%+12713F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…28,336$2.89M0.01%-62613F-HRTimeline
NewEdge Advisors, LLC28,072$2.86M0.01%-4,57413F-HRTimeline
Verition Fund Management LLC27,900$2.84M0.02%+4,44513F-HRTimeline
Connor, Clark & Lunn Investment Managem…27,117$2.76M0.01%-3,23313F-HRTimeline
Independent Advisor Alliance26,706$2.72M0.07%-42613F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\26,210$2.67M<0.01%+41913F-HRTimelineGroup
Aurora Investment Counsel26,177$2.67M1.4%+23913F-HRTimeline
Kentucky Retirement Systemsgroup of 2 filers holding26,141$2.66M-430Timeline
OPPENHEIMER ASSET MANAGEMENT INC.group of 2 filers holding25,768$2.63M+2,592Timeline
SHELTON CAPITAL MANAGEMENT25,663$2.62M0.06%013F-HRTimeline
FIFTH THIRD BANK, NATIONAL ASSOCIATIONgroup of 2 filers holding25,198$2.57M+1,276Timeline
American Assets Capital Advisers, LLC24,433$2.49M2.63%+1,46413F-HRTimeline
Investor's Fiduciary Advisor Network, L…24,385$2.48M0.84%-5,64313F-HRTimeline
CoreFirst Bank & Trust24,079$2.45M1.33%-75513F-HRTimeline
Nepsis Inc.23,942$2.44M0.77%-8,05213F-HRTimeline
PFG Investments, LLC23,916$2.44M0.13%+31713F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC23,832$2.43M0.04%-95013F-HRTimelineGroup
Sippican Capital Advisors23,532$2.4M1.59%-18013F-HRTimeline
GeoWealth Management, LLC23,419$2.39M0.09%-21313F-HRTimeline
Capital Investment Advisors, LLC23,227$2.37M0.04%-15213F-HRTimeline
Naviter Wealth, LLC23,005$2.36M0.28%+66413F-HRTimeline
F/m Investments LLC23,106$2.36M0.09%-50013F-HRTimeline
STOCK YARDS BANK & TRUST CO23,047$2.35M0.07%-22313F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…22,954$2.34M0.02%013F-HRTimeline
Avanza Fonder AB22,699$2.31M0.06%+5,77413F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC22,454$2.29M0.05%-38613F-HRTimelineGroup
BENJAMIN EDWARDS INCin group BENJAMIN EDWARDS INC22,448$2.29M0.03%+3,39913F-HRTimelineGroup
Tema ETFs LLC22,395$2.28M0.19%new13F-HRTimeline
&PARTNERS22,242$2.27M0.01%+5,91113F-HRTimeline
AGF MANAGEMENT LTDin group AGF MANAGEMENT LTD22,185$2.26M0.01%+14,20513F-HRTimelineGroup
Erste Asset Management GmbHin group Erste Asset Management GmbH22,381$2.25M0.02%-8,43513F-HRTimelineGroup
Verdence Capital Advisors LLC20,732$2.21M0.13%+14,01513F-HRTimeline
KCM INVESTMENT ADVISORS LLC21,327$2.17M0.07%013F-HRTimeline
Fiduciary Trust Coin group Fiduciary Trust Co21,323$2.17M0.02%-1,25113F-HRTimelineGroup
Heritage Trust Co21,154$2.16M0.23%-2113F-HRTimeline
Polar Asset Management Partners Inc.20,919$2.13M0.04%-38,72713F-HR/ATimeline
GABLES CAPITAL MANAGEMENT INC.20,792$2.12M0.91%-75013F-HRTimeline
PRAXIS INVESTMENT MANAGEMENT INC20,717$2.11M0.13%+2,92713F-HRTimeline
Lido Advisors, LLCin group Lido Advisors, LLC20,501$2.11M0.01%+2,02513F-HRTimelineGroup
CASCADE INVESTMENT GROUP, INC.20,486$2.09M1.38%-42713F-HRTimeline
INSPIRE TRUST CO, N.A.20,000$2.04M0.37%+3,00013F-HRTimeline
Merit Financial Group, LLC19,930$2.03M0.02%+10913F-HR/ATimeline
CORRADO ADVISORS, LLC19,746$2.01M1.08%+5,46913F-HRTimeline
MASTERINVEST Kapitalanlage GmbH19,717$2.01M0.2%+1,28013F-HRTimeline
PARK AVENUE SECURITIES LLCin group PARK AVENUE SECURITIES LLC19,520$1.99M0.02%-93413F-HRTimelineGroup
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC21,511$1.99M0.04%+1,12513F-HRTimelineGroup
HORIZON KINETICS ASSET MANAGEMENT LLC19,455$1.98M0.02%-13,00013F-HRTimeline
ZACKS INVESTMENT MANAGEMENT19,412$1.98M0.02%+14013F-HRTimeline
Kentucky Trust Co19,270$1.96M1.06%-79513F-HRTimeline
MOODY NATIONAL BANK TRUST DIVISIONin group MOODY NATIONAL BANK TRUST DIV…18,942$1.93M0.16%-6,48213F-HRTimelineGroup
RFG Advisory, LLC18,761$1.91M0.04%-1,08713F-HRTimeline
FLPUTNAM INVESTMENT MANAGEMENT CO18,746$1.91M0.03%+67013F-HRTimeline
Diversify Advisory Services, LLCgroup of 2 filers holding18,288$1.9M-1,521Timeline
WESTPAC BANKING CORPin group WESTPAC BANKING CORP18,456$1.88M0.12%013F-HR/ATimelineGroup
DoubleLine ETF Adviser LP18,383$1.87M0.56%+97413F-HRTimeline
Rakuten Investment Management, Inc.in group Rakuten Group, Inc.30,578$1.86M0.01%13F-HRTimelineGroup
Sterling Capital Management LLC18,140$1.85M0.03%-1,73113F-HRTimeline
Madison Asset Management, LLCin group Madison Asset Management, LLC17,960$1.83M0.02%-57113F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP18,075$1.82M<0.01%+1,20213F-HRTimelineGroup
Trust Investment Advisors17,328$1.77M0.99%+24713F-HRTimeline
ING GROEP NV17,304$1.76M0.01%-5,64013F-HRTimeline
HARTFORD INVESTMENT MANAGEMENT CO17,300$1.76M0.05%-44013F-HRTimeline
Edgestream Partners, L.P.17,300$1.76M0.05%-114,18213F-HRTimeline
AG2R LA MONDIALE GESTION D'ACTIFS16,338$1.68M0.09%013F-HRTimeline
HighPoint Advisor Group LLC16,423$1.67M0.08%+69513F-HRTimeline
IHT Wealth Management, LLC16,290$1.66M0.04%-66113F-HRTimeline
Claro Advisors Inc.16,213$1.65M0.24%-9213F-HRTimeline
KING LUTHER CAPITAL MANAGEMENT CORP16,210$1.65M0.01%-43613F-HRTimeline
COMMERCE BANKin group COMMERCE BANK16,191$1.65M0.01%-2,02713F-HRTimelineGroup
BROWN ADVISORY INCin group BROWN ADVISORY INC15,843$1.62M<0.01%+2,95813F-HRTimelineGroup
Louisiana State Employees Retirement Sy…15,500$1.58M0.03%-10013F-HRTimeline
One Charles Private Wealth Services, LLC15,366$1.57M0.41%+1813F-HRTimeline
HIGHLINE WEALTH PARTNERS LLC15,199$1.55M0.42%-1,41213F-HRTimeline
Brookfield Corp /ON/in group Brookfield Corp /ON/15,115$1.54M<0.01%+92213F-HRTimelineGroup
Creekmur Asset Management LLC15,097$1.54M0.26%-54813F-HRTimeline
Crossmark Global Holdings, Inc.15,019$1.53M0.02%-50,77413F-HRTimeline
Snowden Capital Advisors LLC14,889$1.53M0.04%013F-HRTimeline
Summit Trail Advisors, LLC14,765$1.51M0.02%+8,48213F-HRTimeline
Robeco Institutional Asset Management B…in group Robeco Institutional Asset Ma…14,725$1.5M<0.01%013F-HRTimelineGroup
Gulf International Bank (UK) Ltd14,690$1.5M0.05%-22013F-HRTimeline
IMC-Chicago, LLC14,611$1.49M0.03%new13F-HRTimeline
MOODY LYNN LIEBERSON & WALKER, LLC14,569$1.49M0.08%+35913F-HRTimeline
DRW Securities, LLC14,414$1.47M0.08%+6,25413F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC14,437$1.47M0.01%-120,96013F-HRTimeline
BI Asset Management Fondsmaeglerselskab…in group BI Asset Management Fondsmaeg…14,429$1.47M0.01%+21013F-HRTimelineGroup
Metis Global Partners, LLC14,370$1.46M0.03%+4713F-HRTimeline
Community Bank of Raymore14,291$1.46M1.01%+95013F-HRTimeline
Maryland State Retirement & Pension Sys…14,259$1.45M0.03%013F-HRTimeline
SECURIAN ASSET MANAGEMENT, INC14,197$1.45M0.04%-1,16413F-HRTimeline
Spire Wealth Managementin group Spire Wealth Management13,996$1.43M0.05%+51813F-HRTimelineGroup
REIK & CO., LLC13,980$1.43M0.37%013F-HRTimeline
CHOREO, LLC13,838$1.42M0.02%-25513F-HRTimeline
Investment Management Corp of Ontario13,909$1.42M0.02%+6,71813F-HRTimeline
Beacon Financial Advisory LLC13,836$1.41M0.33%-42613F-HRTimeline
Royal Fund Management, LLC13,695$1.4M0.17%-86513F-HRTimeline
AE Wealth Management LLC13,566$1.38M0.01%+50413F-HRTimeline
Comprehensive Money Management Services…13,560$1.38M0.98%-1,16513F-HRTimeline
Engineers Gate Manager LP13,369$1.36M0.02%-53,37613F-HRTimeline
Crescent Grove Advisors, LLC13,255$1.36M0.13%013F-HRTimeline
NEW MEXICO EDUCATIONAL RETIREMENT BOARD13,340$1.36M0.04%-40013F-HRTimeline
HB Wealth Management, LLC13,186$1.34M0.01%+3,16413F-HRTimeline
Daiichi Life Insurance Co., Ltd.in group Daiichi Life Insurance Co., L…13,089$1.33M0.03%013F-HRTimelineGroup
ExodusPoint Capital Management, LP13,038$1.33M0.02%-75,00913F-HRTimeline
Focus Financial Network, Inc.12,998$1.32M0.05%+31313F-HRTimeline
SCHRODER INVESTMENT MANAGEMENT GROUP13,079$1.31M<0.01%-73813F-HRTimeline
ROMAN BUTLER FULLERTON & CO12,850$1.3M0.35%+2913F-HRTimeline
Wealthcare Advisory Partners LLCin group Wealthcare Advisory Partners …12,725$1.3M0.03%-28413F-HRTimelineGroup
INCEPTIONR LLC12,725$1.3M0.31%-3,06013F-HRTimeline
E. Ohman J:or Asset Management AB12,703$1.29M0.03%013F-HRTimeline
HM PAYSON & CO12,526$1.28M0.02%013F-HRTimeline
Essex Financial Services, Inc.group of 2 filers holding12,342$1.26M-15Timeline
Arista Wealth Management, LLC12,301$1.25M0.16%013F-HRTimeline
ODDO BHF ASSET MANAGEMENT SAS12,276$1.25M0.05%-15,29413F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.