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Iron Mountain (IRM) Institutional Ownership

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$105.42 -0.95 (-0.89%)
As of 12:45 PM Eastern
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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)
697
Total
Institutional Inflows
(last 12 months)
$5.09B
Number of
Institutional Sellers
(last 12 months)
569
Total
Institutional Outflows
(last 12 months)
$3.54B
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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
10/7/2025Sonora Investment Management Group LLC87,250$8.89M0.6%-2.5%0.030%
10/7/2025Oak Thistle LLC11,980$1.22M0.2%+85.2%0.004%
10/6/2025Moody National Bank Trust Division18,942$1.93M0.2%-25.5%0.006%
10/6/2025Venture Visionary Partners LLC33,180$3.38M0.1%+0.6%0.011%
10/2/2025 GAMMA Investing LLC6,497$662K0.0%+18.6%0.002%
10/1/2025 Praxis Investment Management Inc.20,717$2.11M0.1%+16.5%0.007%
9/26/2025Corient Private Wealth LLC220,275$22.59M0.0%-1.6%0.075%
9/24/2025Texas Permanent School Fund Corp26,780$2.75M0.0%-27.6%0.009%
9/12/2025Valeo Financial Advisors LLC2,088$214K0.0%N/A0.001%
9/4/2025Osaic Holdings Inc.119,147$12.22M0.0%-1.7%0.040%
8/29/2025Evolution Wealth Management Inc.952$98K0.1%N/A0.000%
8/29/2025Centaurus Financial Inc.6,568$674K0.0%+2.1%0.002%
8/27/2025Orion Porfolio Solutions LLC7,966$817K0.0%-8.0%0.003%
8/26/2025Thrivent Financial for Lutherans107,292$11.00M0.0%-15.9%0.036%
8/26/2025MASTERINVEST Kapitalanlage GmbH18,437$1.89M0.2%N/A0.006%
8/21/2025Pathway Financial Advisers LLC10,153$1.04M0.3%-2.1%0.003%
8/20/2025Kentucky Retirement Systems18,654$1.91M0.1%-6.1%0.006%
8/20/2025Kentucky Retirement Systems Insurance Trust Fund7,917$812K0.1%-6.5%0.003%
8/20/2025Coppell Advisory Solutions LLC13,061$1.34M0.2%N/A0.004%
8/19/2025B. Riley Wealth Advisors Inc.4,060$416K0.0%N/A0.001%
8/19/2025Advisory Services Network LLC11,664$1.14M0.0%-2.9%0.004%
8/18/2025Hudson Bay Capital Management LP6,108$626K0.0%N/A0.002%
8/18/2025Tyler Stone Wealth Management18,607$1.91M0.3%+1.0%0.006%
8/18/2025Nomura Holdings Inc.2,772$284K0.0%-96.3%0.001%
8/18/2025Geneos Wealth Management Inc.2,399$246K0.0%+145.3%0.001%
8/18/2025CYBER HORNET ETFs LLC767$79K0.1%N/A0.000%
8/16/2025Public Sector Pension Investment Board60,672$6.22M0.0%-22.8%0.021%
8/16/2025Headlands Technologies LLC1,122$115K0.0%N/A0.000%
8/15/2025Strategic Investment Advisors MI4,008$407K0.0%-31.6%0.001%
8/15/2025CANADA LIFE ASSURANCE Co437,654$44.95M0.1%-1.3%0.148%
8/15/2025Adelante Capital Management LLC403,205$41.36M2.9%+3.3%0.137%
8/15/2025Tower Research Capital LLC TRC 19,882$2.04M0.1%+85.8%0.007%
8/15/2025MUFG Securities EMEA plc865$89K0.0%N/A0.000%
8/15/2025Corient Private Wealth LLC220,602$22.63M0.0%-1.4%0.075%
8/15/2025State of Tennessee Department of Treasury100,097$10.27M0.0%-2.3%0.034%
8/15/2025Captrust Financial Advisors769,181$78.90M0.2%-4.3%0.260%
8/15/2025Prevail Innovative Wealth Advisors LLC46,555$4.78M1.1%+47.1%0.016%
8/15/2025BROOKFIELD Corp ON 14,193$1.46M0.0%+1.2%0.005%
8/15/2025Vident Advisory LLC9,817$1.01M0.0%+6.7%0.003%
8/15/2025Two Sigma Securities LLC8,798$902K0.1%N/A0.003%
8/15/2025Smartleaf Asset Management LLC1,479$151K0.0%-11.4%0.001%
8/15/2025Snowden Capital Advisors LLC14,889$1.54M0.0%-10.8%0.005%
8/15/2025Royal London Asset Management Ltd.143,234$14.69M0.0%-3.9%0.048%
8/15/2025Rafferty Asset Management LLC37,390$3.84M0.0%+16.7%0.013%
8/15/2025Orion Porfolio Solutions LLC7,966$817K0.0%-8.0%0.003%
8/15/2025MML Investors Services LLC78,764$8.08M0.0%-2.5%0.027%
8/15/2025Man Group plc55,123$5.65M0.0%-74.3%0.019%
8/15/2025HRT Financial LP83,708$8.59M0.0%N/A0.028%
8/15/2025Hudson Bay Capital Management LP6,108$626K0.0%N/A0.002%
8/15/2025ICONIQ Capital LLC2,792$286K0.0%N/A0.001%
8/15/2025IHT Wealth Management LLC16,951$1.74M0.0%-0.8%0.006%
8/15/2025Great Valley Advisor Group Inc.4,284$440K0.0%+28.8%0.001%
8/15/2025EP Wealth Advisors LLC17,146$1.76M0.0%+14.8%0.006%
8/15/2025Engineers Gate Manager LP66,745$6.85M0.1%+21.1%0.023%
8/15/2025Curi Capital LLC4,853$500K0.0%+27.3%0.002%
8/15/2025BI Asset Management Fondsmaeglerselskab A S14,219$1.46M0.0%+22.4%0.005%
8/15/2025BNP Paribas Financial Markets426,625$43.76M0.0%-26.2%0.144%
8/15/2025BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp46,215$4.74M0.0%-17.7%0.016%
8/15/2025Brevan Howard Capital Management LP61,532$6.31M0.0%N/A0.021%
8/15/2025Balyasny Asset Management L.P.388,197$39.82M0.1%-29.9%0.131%
8/15/2025Bamco Inc. NY107,524$11.03M0.0%N/A0.036%
8/15/2025Bank of America Corp DE1,249,442$128.16M0.0%+12.0%0.423%
8/15/2025Adage Capital Partners GP L.L.C.560,252$57.47M0.1%+76.2%0.190%
8/15/2025AQR Capital Management LLC106,009$10.77M0.0%+62.7%0.036%
8/15/2025Ameriprise Financial Inc.1,705,824$175.93M0.0%+9.7%0.578%
8/14/2025CTC Alternative Strategies Ltd.4,795$492K0.4%N/A0.002%
8/14/2025Lighthouse Investment Partners LLC50,200$5.15M0.2%+1,908.0%0.017%
8/14/2025Nia Impact Advisors LLC52,502$5.39M1.9%-18.1%0.018%
8/14/2025California State Teachers Retirement System452,201$46.38M0.1%+4.9%0.153%
8/14/2025Worldquant Millennium Advisors LLC268,157$27.51M0.1%+2.7%0.091%
8/14/2025Canada Pension Plan Investment Board107,956$11.07M0.0%-1.3%0.037%
8/14/2025Quantinno Capital Management LP88,511$9.08M0.0%+117.4%0.030%
8/14/2025DZ BANK AG Deutsche Zentral Genossenschafts Bank Frankfurt am Main377,807$38.75M0.0%+215.4%0.128%
8/14/2025Diversify Advisory Services LLC17,214$1.77M0.1%+165.6%0.006%
8/14/2025Lavaca Capital LLC300$31K0.0%-72.8%0.000%
8/14/2025Alliancebernstein L.P.561,286$57.57M0.0%-6.4%0.190%
8/14/2025Peapack Gladstone Financial Corp56,085$5.75M0.1%-0.9%0.019%
8/14/2025HUB Investment Partners LLC11,570$1.19M0.0%+8.4%0.004%
8/14/2025Treasurer of the State of North Carolina137,047$14.06M0.0%+2.9%0.046%
8/14/2025Glenview Trust co11,005$1.13M0.0%N/A0.004%
8/14/2025The Manufacturers Life Insurance Company 186,034$19.08M0.0%-4.7%0.063%
8/14/2025Sei Investments Co.885,080$90.78M0.1%+4.2%0.300%
8/14/2025NewEdge Advisors LLC32,646$3.35M0.0%+19.2%0.011%
8/14/2025Investment Management Corp of Ontario7,191$738K0.0%-13.3%0.002%
8/14/2025AXA S.A.101,843$10.45M0.0%+285.0%0.034%
8/14/2025State Street Corp16,809,643$1.74B0.1%+0.6%5.691%
8/14/2025Daiwa Securities Group Inc.2,954,927$303.09M1.1%+7.4%1.000%
8/14/2025CoreFirst Bank & Trust24,834$2.55M1.4%-1.0%0.008%
8/14/2025SVB Wealth LLC8,222$843K0.0%-16.8%0.003%
8/14/2025Natixis12,358$1.27M0.0%-36.9%0.004%
8/14/2025Ossiam15,273$1.57M0.0%-1.7%0.005%
8/14/2025Bank of Nova Scotia42,189$4.33M0.0%-2.9%0.014%
8/14/2025California Public Employees Retirement System493,885$50.66M0.0%+3.1%0.167%
8/14/2025Cary Street Partners Financial LLC12,185$1.25M0.0%-2.0%0.004%
8/14/2025Cerity Partners LLC35,292$3.62M0.0%+3.6%0.012%
8/14/2025Federated Hermes Inc.162,932$16.71M0.0%+1,537.3%0.055%
8/13/2025Jump Financial LLC3,515$361K0.0%-98.8%0.001%
8/13/2025Brown Advisory Inc.12,885$1.32M0.0%+2.6%0.004%
8/13/2025Amundi1,600,818$159.46M0.1%+45.5%0.542%
8/13/2025Epoch Investment Partners Inc.683,612$70.12M0.4%-4.3%0.231%
(Data available from 1/1/2016 forward)

IRM Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of IRM shares?

During the previous two years, 1,097 institutional investors and hedge funds held shares of Iron Mountain. The most heavily invested institutionals were Vanguard Group Inc. ($4.83B), State Street Corp ($1.74B), Cohen & Steers Inc. ($1.57B), Geode Capital Management LLC ($826.19M), Invesco Ltd. ($439.98M), Norges Bank ($419.46M), and Capital World Investors ($401.25M).Learn more on Iron Mountain's institutional investors.

What percentage of Iron Mountain's stock is owned by institutional investors?

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

Which institutional investors have been buying Iron Mountain's stock?

Of the 916 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: Cohen & Steers Inc. ($15.04M), Norges Bank ($10.67M), Wealthfront Advisers LLC ($6.80M), Invesco Ltd. ($3.25M), Daiwa Securities Group Inc. ($2.90M), UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC ($2.67M), and Wellington Management Group LLP ($2.29M).

How much institutional buying is happening at Iron Mountain?

Institutional investors have bought a total of 49,731,547 shares in the last 24 months. This purchase volume represents approximately $5.09B in transactions.

Which of Iron Mountain's major shareholders have been selling company stock?

Of the 569 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: Cohen & Steers Inc. ($2.82M), UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC ($2.75M), FMR LLC ($2.68M), Wellington Management Group LLP ($2.31M), TD Asset Management Inc ($1.77M), Daiwa Securities Group Inc. ($1.57M), and Canada Pension Plan Investment Board ($961.15K).

How much institutional selling is happening at Iron Mountain?

Institutional investors have sold a total of 33,699,026 shares in the last 24 months. This volume of shares sold represents approximately $3.54B in transactions.


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This page (NYSE:IRM) was last updated on 10/7/2025 by MarketBeat.com Staff
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