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Disclosery

IRM IRON MTN INC DEL

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REIT (common), issuer CIK 1020569

1,057 managers (1,089 13F filers) reported a position in IRM shares at 2026-03-31, 253,245,822 shares in all. 157 filers opened a position and 95 filers sold out during the quarter.

Managers
1,057
13F filers
1,089
New
157
Added
403
Reduced
348
Sold out
95
Shares held by filers
253,245,822

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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
SALEM INVESTMENT COUNSELORS INC78,121$7.98M0.23%+64313F-HR/ATimeline
MetLife Investment Management, LLCin group MetLife Investment Management…77,453$7.91M0.04%-1,59013F-HRTimelineGroup
STATE OF MICHIGAN RETIREMENT SYSTEM77,246$7.89M0.04%-10013F-HRTimeline
Allworth Financial LP76,346$7.8M0.03%-1,48113F-HRTimeline
NORTHWESTERN MUTUAL INVESTMENT MANAGEME…group of 2 filers holding76,145$7.78M+759Timeline
Azimuth Capital Investment Management L…75,235$7.68M0.29%+3,25013F-HRTimeline
&PARTNERS73,354$7.49M0.04%-1713F-HRTimeline
CIBC Asset Management Inc71,980$7.35M0.02%+7913F-HRTimeline
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …72,955$7.32M0.01%+5,02713F-HRTimelineGroup
INTACT INVESTMENT MANAGEMENT INC.in group INTACT INVESTMENT MANAGEMENT …71,600$7.31M0.21%013F-HRTimelineGroup
Wealthfront Advisers LLC69,793$7.13M0.02%+2,35413F-HRTimeline
HOURGLASS CAPITAL, LLC69,700$7.12M1.48%-10,36013F-HRTimeline
SEB Asset Management AB69,230$7.07M0.03%13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…68,569$7M<0.01%+7,37513F-HRTimelineGroup
FORESIGHT CAPITAL MANAGEMENT ADVISORS, …68,289$6.97M3.88%-16,47413F-HRTimeline
MML INVESTORS SERVICES, LLC67,744$6.92M0.02%+2,57713F-HRTimeline
LEE DANNER & BASS INC67,141$6.86M0.43%+1,93313F-HRTimeline
USS Investment Management Ltd66,744$6.82M0.03%+2,17213F-HRTimeline
Engineers Gate Manager LP66,394$6.78M0.08%-93,08813F-HRTimeline
WOODSTOCK CORP65,497$6.69M0.6%+1,78013F-HRTimeline
QRG CAPITAL MANAGEMENT, INC.64,952$6.63M0.07%+14,03113F-HRTimeline
Vestcor Inc64,510$6.59M0.18%-24,38113F-HRTimeline
PFA Pension, Forsikringsaktieselskab63,697$6.51M0.02%+22313F-HRTimeline
Pensionfund PDNgroup of 2 filers holding62,800$6.41M+5,500Timeline
THOMPSON SIEGEL & WALMSLEY LLC62,100$6.34M0.11%+15,80013F-HRTimeline
ASR Vermogensbeheer N.V.61,925$6.33M0.07%+1,16613F-HRTimeline
PensionDanmark Pensionsforsikringsaktie…61,027$6.23M0.06%+3,87713F-HRTimeline
Swiss Life Asset Management Ltdin group Swiss Life Asset Management L…60,611$6.19M0.03%-73713F-HRTimelineGroup
PEAK6 LLCin group PEAK6 LLC60,388$6.17M0.18%+55,07113F-HRTimelineGroup
EASTERLY INVESTMENT PARTNERS LLC61,996$6.11M0.47%-11,52013F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC58,235$5.95M0.01%-11513F-HRTimelineGroup
Osmosis Investment Management UK Ltd57,710$5.94M0.16%+40,18013F-HRTimeline
Woodline Partners LP57,860$5.91M0.02%+7,50713F-HR/ATimeline
PEAPACK GLADSTONE FINANCIAL CORP57,373$5.86M0.07%-32513F-HRTimeline
XPONANCE LLC55,989$5.72M0.04%+7,09513F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …56,453$5.7M0.01%+22,56213F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP55,694$5.69M<0.01%+2,01113F-HRTimelineGroup
Federation des caisses Desjardins du Qu…54,898$5.61M0.02%+4,81113F-HRTimeline
ProShare Advisors LLC54,548$5.57M0.01%-12,00013F-HRTimeline
Candriam S.C.A.53,827$5.5M0.03%-7,31613F-HRTimeline
Oak Thistle LLC53,641$5.48M0.53%new13F-HRTimeline
CWM, LLCin group CWM, LLC53,578$5.47M0.01%+31,96713F-HRTimelineGroup
AMALGAMATED BANK53,267$5.44M0.04%-1,71813F-HRTimeline
Werlinich Asset Management, LLC51,982$5.31M2.58%+7513F-HRTimeline
New Age Alpha Advisors, LLC51,587$5.27M0.25%-18,30413F-HRTimeline
Hennion & Walsh Asset Management, Inc.51,046$5.21M0.18%-4,71813F-HRTimeline
First National Trust Co50,618$5.17M0.18%-64513F-HRTimeline
VAN LANSCHOT KEMPEN INVESTMENT MANAGEME…50,467$5.15M0.05%-5,61113F-HRTimeline
Advisors Asset Management, Inc.50,399$5.15M0.09%+1,53413F-HRTimeline
NIA IMPACT ADVISORS, LLC49,872$5.09M2.26%-2,10213F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…53,411$5.09M0.01%-1,17313F-HRTimeline
Utah Retirement Systems47,687$4.87M0.05%-79213F-HRTimeline
RB Capital Management, LLC47,363$4.84M1.03%+14713F-HRTimeline
Ethic Inc.45,926$4.69M0.07%-2,35113F-HRTimeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC45,599$4.66M0.02%+13,15113F-HRTimeline
Police & Firemen's Retirement System of…45,128$4.61M0.04%+17813F-HRTimeline
Steward Partners Investment Advisory, L…44,785$4.57M0.02%+1,91013F-HRTimeline
New York Life Investment Management LLCin group New York Life Investment Mana…44,193$4.51M0.04%+1,13513F-HRTimelineGroup
Trinity Legacy Partners, LLC38,864$4.43M0.96%-64213F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP44,536$4.38M<0.01%+21,51813F-HRTimelineGroup
Baird Financial Group, Inc.in group Baird Financial Group, Inc.42,707$4.36M0.01%-3,18413F-HRTimelineGroup
Anson Funds Management LPin group Anson Funds Management LP42,200$4.31M0.55%new13F-HR/ATimelineGroup
Venture Visionary Partners LLC42,173$4.31M0.14%+6,41113F-HRTimeline
Rakuten Investment Management, Inc.in group Rakuten Group, Inc.43,893$4.28M0.01%+5,01913F-HRTimelineGroup
NewEdge Advisors, LLC41,818$4.27M0.02%+16,69213F-HR/ATimeline
Moors & Cabot, Inc.41,277$4.22M0.18%-1,15213F-HRTimeline
BRITISH COLUMBIA INVESTMENT MANAGEMENT …40,739$4.16M0.02%-11,53013F-HRTimeline
HOLDERNESS INVESTMENTS CO40,339$4.12M0.83%-38513F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC39,914$4.08M0.05%-1,29213F-HRTimeline
Gotham Asset Management, LLC39,732$4.06M0.01%+1,18513F-HRTimeline
REGIONS FINANCIAL CORPin group REGIONS FINANCIAL CORP39,516$4.04M0.03%-175,12613F-HRTimelineGroup
PINEBRIDGE INVESTMENTS LLC39,476$4.03M0.03%-38,93413F-HRTimeline
Ranch Capital Advisors Inc.39,233$4.03M1.47%+1,59413F-HRTimeline
WealthTrust Axiom LLC39,384$4.02M0.99%+3713F-HRTimeline
D.A. DAVIDSON & CO.38,481$3.93M0.02%+5,83213F-HRTimeline
SPIRIT OF AMERICA MANAGEMENT CORP/NY38,450$3.93M0.78%+60013F-HRTimeline
TUDOR INVESTMENT CORP ET AL37,208$3.8M0.02%+15,01813F-HRTimeline
American Trust Investment Advisors, LLC37,146$3.79M2.1%+52213F-HRTimeline
ING GROEP NV36,276$3.71M0.02%new13F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC36,209$3.7M0.01%+1,43913F-HRTimelineGroup
Waverly Advisors, LLC36,018$3.68M0.03%+1,59613F-HRTimeline
MACKENZIE FINANCIAL CORP35,592$3.64M<0.01%+2,84113F-HRTimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP34,031$3.48M<0.01%-2,91313F-HRTimelineGroup
OREGON PUBLIC EMPLOYEES RETIREMENT FUND33,889$3.46M0.05%+10013F-HRTimeline
Y-Intercept (Hong Kong) Ltd33,654$3.44M0.07%+9,38213F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson33,266$3.4M<0.01%-4,76613F-HR/ATimelineGroup
Smithfield Trust Co31,715$3.24M0.14%-46413F-HRTimeline
ALLSTATE CORPin group ALLSTATE CORP31,714$3.24M0.03%+9,28713F-HRTimelineGroup
Knights of Columbus Asset Advisors LLC31,649$3.23M0.18%013F-HRTimeline
Andra AP-fonden31,552$3.22M0.04%-169,74813F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…31,465$3.21M0.04%-27213F-HRTimelineGroup
Norinchukin Bank, Thein group Norinchukin Bank, The31,441$3.21M0.04%-37013F-HRTimelineGroup
Fideuram Asset Management (Ireland) dac28,988$3.18M0.4%+28,89113F-HRTimeline
OP Asset Management Ltd30,698$3.14M0.03%-2,21913F-HR/ATimeline
Siemens Fonds Invest GmbH30,654$3.13M0.18%+2,28413F-HRTimeline
Buckland Partners Management Co LLC30,000$3.09M1.87%013F-HRTimeline
BURNEY CO/30,068$3.07M0.1%-16,57913F-HRTimeline
One Capital Management, LLC30,034$3.07M0.08%-47113F-HRTimeline
Cyndeo Wealth Partners, LLC29,951$3.06M0.16%+10113F-HRTimeline
Heritage Trust Co29,798$3.04M0.31%+1,99213F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC29,560$3.02M<0.01%+90913F-HRTimelineGroup
J.W. COLE ADVISORS, INC.29,450$3.01M0.1%-1,40713F-HRTimeline
Rafferty Asset Management, LLC29,108$2.97M0.01%-9,11113F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…28,336$2.89M0.01%013F-HRTimeline
DUMONT & BLAKE INVESTMENT ADVISORS LLC28,204$2.88M0.72%-39313F-HRTimeline
B. Metzler seel. Sohn & Co. AGin group B. Metzler seel. Sohn & Co. AG27,812$2.84M0.03%+1,31313F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\27,280$2.79M<0.01%+2,85313F-HRTimelineGroup
Sage Capital Management, LLC26,692$2.73M1.28%-51813F-HRTimeline
FIFTH THIRD BANK, NATIONAL ASSOCIATIONgroup of 2 filers holding26,531$2.71M+150Timeline
Gradient Investments LLCin group Gradient Investments LLC26,439$2.7M0.04%new13F-HRTimelineGroup
Entropy Technologies, LP26,399$2.7M0.12%+20,78513F-HRTimeline
Independent Advisor Alliance25,787$2.63M0.03%-98013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd25,465$2.6M0.05%new13F-HRTimelineGroup
LANARK FINANCIAL, INC.25,426$2.6M0.19%+21,80013F-HRTimeline
Meridian Wealth Advisors, LLC25,399$2.59M0.34%+5,08513F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.group of 2 filers holding25,204$2.57M-293Timeline
Merit Financial Group, LLC25,033$2.56M0.02%+4,36313F-HRTimeline
PARK AVENUE SECURITIES LLCin group PARK AVENUE SECURITIES LLC24,807$2.53M0.02%+7,54713F-HRTimelineGroup
Vectors Research Management, LLC24,565$2.51M0.73%-13,06013F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC24,263$2.48M0.01%+10,52113F-HRTimelineGroup
Jain Global LLC24,108$2.46M0.03%new13F-HRTimeline
PFG Investments, LLC23,569$2.41M0.11%-1,73713F-HRTimeline
CORRADO ADVISORS, LLC23,483$2.4M1.25%+3,62713F-HRTimeline
WESTPAC BANKING CORPin group WESTPAC BANKING CORP23,311$2.38M0.17%-5913F-HRTimelineGroup
Capital Investment Advisors, LLC23,174$2.37M0.03%+10013F-HR/ATimeline
Empowered Funds, LLC23,082$2.36M0.02%+15,35713F-HR/ATimeline
Gulf International Bank (UK) Ltd22,970$2.35M0.05%+8,12113F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…22,954$2.35M0.02%013F-HRTimeline
Sippican Capital Advisors22,727$2.32M1.59%-55013F-HRTimeline
Avanza Fonder AB22,699$2.32M0.06%013F-HRTimeline
CoreFirst Bank & Trust22,629$2.31M1.23%-21013F-HRTimeline
Nepsis Inc.22,530$2.3M0.77%-55813F-HRTimeline
Allianz Asset Management GmbHin group Allianz SE22,278$2.28M<0.01%-13,08613F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC22,268$2.27M0.02%-71,94813F-HRTimeline
Naviter Wealth, LLC21,964$2.26M0.28%+2,17013F-HRTimeline
GeoWealth Management, LLC22,144$2.26M0.08%+1,74813F-HRTimeline
Erste Asset Management GmbHin group Erste Asset Management GmbH23,000$2.24M0.02%+2,10013F-HRTimelineGroup
BROWN ADVISORY INCin group BROWN ADVISORY INC21,830$2.23M<0.01%+5,81113F-HRTimelineGroup
BENJAMIN EDWARDS INCin group BENJAMIN EDWARDS INC21,816$2.23M0.02%-56613F-HRTimelineGroup
STOCK YARDS BANK & TRUST CO21,739$2.22M0.07%-72813F-HRTimeline
Pasadena Private Wealth, LLC21,610$2.21M0.31%-1,95413F-HRTimeline
KCM INVESTMENT ADVISORS LLC21,311$2.18M0.07%+113F-HRTimeline
MASTERINVEST Kapitalanlage GmbH21,228$2.17M0.23%+1,51113F-HRTimeline
Investment Management Corp of Ontario21,135$2.16M0.03%-3,85413F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC20,892$2.13M0.05%-1,15613F-HRTimelineGroup
Lido Advisors, LLCin group Lido Advisors, LLC20,708$2.13M0.01%-50713F-HRTimelineGroup
PRAXIS INVESTMENT MANAGEMENT INC20,717$2.12M0.13%013F-HRTimeline
Investor's Fiduciary Advisor Network, L…20,627$2.11M0.65%-2,09613F-HRTimeline
Fiduciary Trust Coin group Fiduciary Trust Co20,316$2.08M0.02%-92213F-HRTimelineGroup
MAI Capital Management20,234$2.07M0.01%+2,94413F-HRTimeline
Edgestream Partners, L.P.20,057$2.05M0.07%new13F-HRTimeline
NewEdge Wealth, LLC19,365$1.98M0.02%+5,66313F-HRTimeline
GABLES CAPITAL MANAGEMENT INC.19,342$1.98M0.84%-95013F-HRTimeline
GRS Advisors, LLC19,231$1.96M0.19%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…19,177$1.96M0.05%+14,65613F-HRTimelineGroup
Blue Sparrow, LLC /DE19,130$1.95M0.03%new13F-HRTimeline
AG2R LA MONDIALE GESTION D'ACTIFS18,963$1.94M0.09%-2,89313F-HRTimeline
Kentucky Trust Co18,865$1.93M1.01%-20013F-HRTimeline
HORIZON KINETICS ASSET MANAGEMENT LLC18,405$1.88M0.02%013F-HRTimeline
COURIER CAPITAL LLC18,021$1.84M0.1%-9,58913F-HR/ATimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC17,932$1.83M0.03%-5,90013F-HRTimelineGroup
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC17,885$1.83M0.04%-3,63813F-HRTimelineGroup
CASCADE INVESTMENT GROUP, INC.17,781$1.82M1.2%-1,45013F-HRTimeline
INSPIRE TRUST CO, N.A.17,559$1.79M0.28%-2,44113F-HRTimeline
CAPITAL FINANCIAL GROUP INC\CO\ /ADV17,472$1.78M0.98%+47713F-HRTimeline
Summit Trail Advisors, LLC17,438$1.78M0.03%+2,45713F-HRTimeline
TWINBEECH CAPITAL LP17,400$1.78M0.18%-28,50013F-HRTimeline
Madison Asset Management, LLCin group Madison Asset Management, LLC17,052$1.74M0.02%013F-HRTimelineGroup
RFG Advisory, LLC16,998$1.74M0.03%-1,53313F-HRTimeline
HARTFORD INVESTMENT MANAGEMENT CO16,879$1.72M0.05%-20113F-HRTimeline
Claro Advisors Inc.16,739$1.71M0.21%+22413F-HRTimeline
Crescent Grove Advisors, LLC16,054$1.71M0.17%+2,79913F-HRTimeline
DRW Securities, LLC16,414$1.68M0.09%+11,80713F-HRTimeline
COMMERCE BANKin group COMMERCE BANK16,393$1.67M0.01%+20913F-HRTimelineGroup
Integrated Wealth Concepts LLC16,363$1.67M0.01%+9,82513F-HRTimeline
World Investment Advisors16,285$1.66M0.03%+2,40513F-HRTimeline
Snowden Capital Advisors LLC15,834$1.63M0.04%+1,10513F-HRTimeline
Community Bank of Raymore15,871$1.62M1.09%+63013F-HRTimeline
Crossmark Global Holdings, Inc.15,818$1.62M0.02%-21013F-HRTimeline
ABN AMRO INVESTMENT SOLUTIONSin group ABN AMRO INVESTMENT SOLUTIONS15,813$1.62M0.02%-40413F-HRTimelineGroup
Royal Fund Management, LLC15,649$1.6M0.15%-30,38113F-HRTimeline
HB Wealth Management, LLC15,406$1.57M0.01%+3,57913F-HRTimeline
KING LUTHER CAPITAL MANAGEMENT CORP15,302$1.56M0.01%-62713F-HRTimeline
DoubleLine ETF Adviser LP15,281$1.56M0.59%-3,79413F-HRTimeline
Louisiana State Employees Retirement Sy…15,100$1.54M0.03%013F-HRTimeline
Havemeyer Place LP15,077$1.54M0.18%+5,68913F-HRTimeline
One Charles Private Wealth Services, LLC14,975$1.53M0.38%-19913F-HRTimeline
SIMPLEX TRADING, LLC14,800$1.51M0.05%+12,44313F-HRTimeline
Carnegie Investment Counsel14,755$1.51M0.03%+10,00013F-HRTimeline
Maryland State Retirement & Pension Sys…14,703$1.5M0.03%+44413F-HRTimeline
Kessler Investment Group, LLC14,657$1.5M0.71%+2,95413F-HRTimeline
Robeco Institutional Asset Management B…in group Robeco Institutional Asset Ma…14,603$1.49M<0.01%-1,09413F-HRTimelineGroup
FOX RUN MANAGEMENT, L.L.C.14,738$1.44M0.25%new13F-HRTimeline
MOODY LYNN LIEBERSON & WALKER, LLC14,065$1.44M0.08%+2113F-HRTimeline
Trust Investment Advisors13,955$1.43M0.83%-3,35613F-HRTimeline
NEW MEXICO EDUCATIONAL RETIREMENT BOARD13,840$1.41M0.04%013F-HRTimeline
Texas Yale Capital Corp.13,505$1.38M0.04%013F-HRTimeline
OMERS ADMINISTRATION Corp13,362$1.36M0.01%+2,88713F-HRTimeline
OSSIAM13,154$1.34M0.02%+50513F-HRTimeline
ROMAN BUTLER FULLERTON & CO12,330$1.32M0.36%-5213F-HRTimeline