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Iron Mountain (IRM) Institutional Ownership

Iron Mountain logo
$123.54 -0.42 (-0.34%)
Closing price 05/19/2026 03:59 PM Eastern
Extended Trading
$124.12 +0.58 (+0.47%)
As of 05/19/2026 08:00 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Iron Mountain (NYSE:IRM)

Current
Institutional Ownership
Percentage
80.13%
Number of
Institutional Buyers
(last 12 months)
602
Total
Institutional Inflows
(last 12 months)
$3.78B
Number of
Institutional Sellers
(last 12 months)
489
Total
Institutional Outflows
(last 12 months)
$1.90B
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Skip Chart & View Institutional Buying and Selling Data

IRM Institutional Buying and Selling by Quarter

Iron Mountain Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/19/2026Western Wealth Management LLC1,397$143K0.0%N/A0.000%
5/19/2026Royal Fund Management LLC15,649$1.60M0.2%-66.0%0.005%
5/19/2026 Bank of America Corp DE1,399,375$142.93M0.0%-7.3%0.470%
5/19/2026 Edgestream Partners L.P.20,057$2.05M0.1%N/A0.007%
5/19/2026 Anson Funds Management LP42,200$4.31M0.4%N/A0.014%
5/19/2026 Janus Henderson Group PLC33,266$3.40M0.0%-12.5%0.011%
5/19/2026 Centaurus Financial Inc.7,115$727K0.0%-1.4%0.002%
5/19/2026 Oddo BHF Asset Management Sas9,183$938K0.0%-8.8%0.003%
5/19/2026 Bull Harbor Capital LLC3,507$358K0.1%N/A0.001%
5/19/2026 Arkadios Wealth Advisors7,386$754K0.0%-4.7%0.002%
5/18/2026 Amundi1,091,574$111.49M0.0%-18.2%0.367%
5/18/2026 Adelante Capital Management LLC356,934$36.46M2.4%+5.2%0.120%
5/18/2026 EverSource Wealth Advisors LLC2,796$286K0.0%+64.1%0.001%
5/18/2026 California State Teachers Retirement System422,871$43.19M0.0%-2.6%0.142%
5/18/2026 Royal Bank of Canada1,410,720$144.09M0.0%+9.7%0.474%
5/18/2026 Empowered Funds LLC23,082$2.36M0.0%+198.8%0.008%
5/16/2026 The Manufacturers Life Insurance Company 173,470$17.72M0.0%-3.6%0.058%
5/16/2026 Quantinno Capital Management LP322,017$32.89M0.1%+92.7%0.108%
5/16/2026 BROOKFIELD Corp ON 188,255$19.23M0.0%+31.4%0.063%
5/15/2026 Cardiff Park Advisors LLC2,725$278K0.0%N/A0.001%
5/15/2026 Gateway Wealth Partners LLC4,017$410K0.0%N/A0.001%
5/15/2026 OMERS ADMINISTRATION Corp13,362$1.37M0.0%+27.6%0.004%
5/15/2026 Waverly Advisors LLC36,018$3.68M0.0%+4.6%0.012%
5/15/2026 Wealth Alliance LLC2,801$286K0.0%N/A0.001%
5/15/2026 Epoch Investment Partners Inc.616,513$62.97M0.4%-2.1%0.207%
5/15/2026 Entropy Technologies LP26,399$2.70M0.1%+370.2%0.009%
5/14/2026 Healthcare of Ontario Pension Plan Trust Fund214,886$21.95M0.0%+1,739.0%0.072%
5/14/2026 Dai ichi Life Insurance Company Ltd12,754$1.30M0.0%-2.6%0.004%
5/14/2026 Renaissance Technologies LLC2,400$245K0.0%N/A0.001%
5/14/2026 Hilltop Holdings Inc.3,776$386K0.0%-11.8%0.001%
5/14/2026 Public Employees Retirement System of Ohio423,714$43.28M0.1%+121.3%0.142%
5/14/2026 Compound Planning Inc.10,967$1.12M0.0%+21.6%0.004%
5/14/2026 Keebeck Wealth Management2,083$215K0.0%N/A0.001%
5/14/2026 Bank of Nova Scotia99,824$10.20M0.0%+27.0%0.034%
5/14/2026 Sei Investments Co.974,792$99.57M0.1%-4.9%0.328%
5/14/2026 Lido Advisors LLC20,708$2.13M0.0%+23.9%0.007%
5/14/2026 Walleye Capital LLC119,864$12.24M0.1%N/A0.040%
5/13/2026 Cetera Investment Advisers260,039$26.56M0.0%+4.6%0.087%
5/13/2026 American Investment Services Inc.3,304$337K0.1%+6.5%0.001%
5/13/2026 Lavaca Capital LLC1,209$123K0.0%+25.8%0.000%
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5/13/2026 Dynamic Wealth Strategies LLC300$31K0.0%N/A0.000%
5/13/2026 Prestige Wealth Management Group LLC3,537$361K0.1%+2,289.9%0.001%
5/13/2026 Measured Wealth Private Client Group LLC4,366$446K0.1%-33.1%0.001%
5/13/2026 NewEdge Wealth LLC19,365$1.98M0.0%+41.3%0.007%
5/13/2026 Wiregrass Investment Management LLC12,728$1.30M1.1%+3.6%0.004%
5/13/2026 First Trust Advisors LP55,694$5.69M0.0%+3.7%0.019%
5/12/2026 ABN Amro Investment Solutions15,813$1.62M0.0%-2.5%0.005%
5/8/2026 PNC Financial Services Group Inc.68,569$7.00M0.0%+12.1%0.023%
5/8/2026 Mathes Company Inc.7,400$756K0.3%-2.0%0.002%
5/8/2026 Burling Wealth Partners LLC10,671$1.09M0.2%-5.3%0.004%
5/8/2026 Andra AP fonden31,552$3.22M0.0%-84.3%0.011%
5/8/2026 One Charles Private Wealth Services LLC14,975$1.53M0.4%-1.3%0.005%
5/8/2026 Cassaday & Co Wealth Management LLC1,324$135K0.0%N/A0.000%
5/8/2026 Commerzbank Aktiengesellschaft FI2,758$282K0.0%-3.4%0.001%
5/7/2026 Meeder Advisory Services Inc.3,741$382K0.0%+2.9%0.001%
5/7/2026 Dimensional Fund Advisors LP4,552,286$464.93M0.1%+2.8%1.530%
5/7/2026 Parallel Advisors LLC3,857$394K0.0%+23.2%0.001%
5/7/2026 KBC Group NV80,345$8.21M0.0%-48.0%0.027%
5/7/2026 SEB Asset Management AB69,230$7.07M0.0%N/A0.023%
5/7/2026 Swiss National Bank867,461$88.60M0.1%+7.2%0.292%
5/7/2026 Crescent Grove Advisors LLC16,054$1.71M0.2%+21.1%0.005%
5/6/2026 IMA Advisory Services Inc.2,787$287K0.0%-6.2%0.001%
5/6/2026 California Public Employees Retirement System502,460$51.32M0.0%-2.2%0.169%
5/6/2026 Ranch Capital Advisors Inc.39,233$4.03M1.5%+4.2%0.013%
5/6/2026 Copeland Capital Management LLC2,091$214K0.0%+94.5%0.001%
5/6/2026 Bessemer Group Inc.29,560$3.02M0.0%+3.2%0.010%
5/6/2026 B&I Capital AG116,467$11.90M4.0%+1.5%0.039%
5/6/2026 Avalon Trust Co700$71K0.0%-41.7%0.000%
5/6/2026 Allspring Global Investments Holdings LLC56,453$5.70M0.0%+66.6%0.019%
5/6/2026 Independent Financial Group LLC8,795$898K0.0%N/A0.003%
5/6/2026 Prosperity Consulting Group LLC2,360$241K0.0%N/A0.001%
5/5/2026 Vectors Research Management LLC24,565$2.51M0.7%-34.7%0.008%
5/5/2026 Wealthfront Advisers LLC69,793$7.13M0.0%+3.5%0.023%
5/5/2026 D.A. Davidson & CO.38,481$3.93M0.0%+17.9%0.013%
5/5/2026 Bank of New York Mellon Corp1,624,836$165.96M0.0%-3.6%0.546%
5/5/2026 MASTERINVEST Kapitalanlage GmbH21,228$2.17M0.2%+7.7%0.007%
5/5/2026 Sanctuary Advisors LLC138,123$14.11M0.1%+0.4%0.046%
5/5/2026 Sigma Planning Corp2,674$273K0.0%-25.8%0.001%
5/5/2026 Adell Harriman & Carpenter Inc.315,817$32.26M2.0%+0.4%0.106%
5/5/2026 Checchi Capital Advisers LLC6,980$713K0.0%+7.2%0.002%
5/5/2026 CFO Capital Management LLC3,874$396K0.3%-23.1%0.001%
5/5/2026 Nwam LLC2,783$284K0.0%+12.2%0.001%
5/5/2026 Maryland State Retirement & Pension System14,703$1.50M0.0%+3.1%0.005%
5/4/2026 Empirical Financial Services LLC d.b.a. Empirical Wealth Management3,780$386K0.0%N/A0.001%
5/4/2026 Bleakley Financial Group LLC12,119$1.24M0.0%+6.3%0.004%
5/4/2026 State of Michigan Retirement System77,246$7.89M0.0%-0.1%0.026%
5/4/2026 Principal Financial Group Inc.4,566,093$466.38M0.2%+8.5%1.535%
5/4/2026 Bedel Financial Consulting Inc.2,392$244K0.0%N/A0.001%
5/4/2026 Chicago Partners Investment Group LLC10,693$1.09M0.0%+69.3%0.004%
5/2/2026 Citizens Business Bank2,199$225K0.0%-22.8%0.001%
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5/2/2026 Diversify Wealth Management LLC8,615$880K0.0%+219.1%0.003%
5/2/2026 Gables Capital Management Inc.19,342$1.98M0.8%-4.7%0.007%
5/2/2026 Carnegie Investment Counsel14,755$1.51M0.0%+210.3%0.005%
5/1/2026 Welch & Forbes LLC652,068$66.60M0.9%-0.7%0.219%
5/1/2026 Commonwealth of Pennsylvania Public School Empls Retrmt SYS202,316$20.67M0.1%+22.8%0.068%
5/1/2026 Fifth Third Bancorp22,940$2.34M0.0%+0.7%0.008%
5/1/2026 Advisors Management Group Inc. ADV4,305$439K0.1%+41.8%0.001%
5/1/2026 Simplicity Wealth LLC5,497$561K0.0%+3.8%0.002%
5/1/2026 Candriam S.C.A.53,827$5.50M0.0%-12.0%0.018%
5/1/2026 Sequoia Financial Advisors LLC10,464$1.07M0.0%+12.8%0.004%


IRM Institutional Ownership - Frequently Asked Questions

During the previous two years, 1,150 institutional investors and hedge funds held shares of Iron Mountain. The most heavily invested institutionals were Vanguard Group Inc. ($3.87B), Cohen & Steers Inc. ($1.57B), State Street Corp ($1.42B), Geode Capital Management LLC ($685.37M), Principal Financial Group Inc. ($466.38M), Dimensional Fund Advisors LP ($464.93M), and Capital World Investors ($401.25M).Learn more on Iron Mountain's institutional investors.

80.13% of Iron Mountain's stock is owned by institutional investors. Learn more on IRM's institutional investor holdings.

Of the 943 institutional investors that purchased Iron Mountain's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Norges Bank ($11.85M), Wealthfront Advisers LLC ($6.80M), UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC ($5.38M), Cohen & Steers Inc. ($3.16M), Invesco Ltd. ($2.95M), Principal Financial Group Inc. ($2.61M), and Nuveen LLC ($2.23M).

Institutional investors have bought a total of 40,227,741 shares in the last 24 months. This purchase volume represents approximately $3.78B in transactions.

Of the 488 institutional investors that sold Iron Mountain's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC ($3.16M), Pictet Asset Management Holding SA ($1.60M), Wellington Management Group LLP ($1.39M), Royal Bank of Canada ($1.01M), Amundi ($757.63K), Invesco Ltd. ($649.15K), and Vanguard Group Inc. ($625.62K).

Institutional investors have sold a total of 20,432,330 shares in the last 24 months. This volume of shares sold represents approximately $1.90B in transactions.


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This page (NYSE:IRM) was last updated on 5/20/2026 by MarketBeat.com Staff.
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