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Iron Mountain (IRM) Institutional Ownership

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$121.30 +0.15 (+0.12%)
As of 03:58 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)
570
Total
Institutional Inflows
(last 12 months)
$8.66B
Number of
Institutional Sellers
(last 12 months)
443
Total
Institutional Outflows
(last 12 months)
$1.72B
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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
8/10/2026Csenge Advisory Group3,926$496K0.0%N/A0.001%
8/10/2026AssuredPartners Investment Advisors LLC1,877$237K0.0%N/A0.001%
8/10/2026Denali Advisors LLC9,495$1.20M0.1%N/A0.003%
8/10/2026NewEdge Wealth LLC21,343$2.70M0.0%N/A0.007%
8/10/2026Danske Bank A S160,962$20.33M0.0%N/A0.054%
8/10/2026Diversify Advisory Services LLC8,550$1.09M0.0%N/A0.003%
8/10/2026Gables Capital Management Inc.19,192$2.42M0.9%N/A0.006%
8/8/2026 Wealthfront Advisers LLC70,478$8.90M0.0%N/A0.024%
8/8/2026 Foster & Motley Inc.3,213$406K0.0%N/A0.001%
8/8/2026 Meeder Advisory Services Inc.3,590$453K0.0%N/A0.001%
8/8/2026 Meeder Asset Management Inc.210$27K0.0%N/A0.000%
8/7/2026 Buckland Partners Management Co LLC30,000$3.82M1.9%N/A0.010%
8/7/2026 IMG Wealth Management Inc.269$34K0.0%N/A0.000%
8/7/2026 BlackRock Inc.33,570,910$4.24B0.1%N/A11.284%
8/7/2026 Dunhill Financial LLC652$82K0.0%N/A0.000%
8/7/2026 Pallas Capital Advisors LLC2,563$324K0.0%N/A0.001%
8/7/2026 Performance Wealth Partners LLC4,953$626K0.0%N/A0.002%
8/7/2026 Deutsche Bank AG3,049,079$385.13M0.1%N/A1.025%
8/7/2026 Perigon Wealth Management LLC4,276$540K0.0%N/A0.001%
8/7/2026 Capital Financial Group Inc. Co. ADV15,979$2.02M1.1%N/A0.005%
8/7/2026 Mitsubishi UFJ Asset Management Co. Ltd.982,596$124.11M0.1%N/A0.330%
8/7/2026 OneDigital Investment Advisors LLC4,979$629K0.0%N/A0.002%
8/7/2026 Plato Investment Management Ltd1,725$217K0.0%N/A0.001%
8/7/2026 Bell Investment Advisors Inc203$26K0.0%N/A0.000%
8/7/2026 Compass Capital Management Inc.3,800$480K0.0%N/A0.001%
8/7/2026 Roman Butler Fullerton & Co.11,826$1.45M0.3%N/A0.004%
8/7/2026 Simplicity Wealth LLC3,648$461K0.0%N/A0.001%
8/7/2026 Trivium Point Advisory LLC8,366$1.06M0.1%N/A0.003%
8/7/2026 RW Investment Management LLC2,000$253K0.0%N/A0.001%
8/7/2026 HBK Sorce Advisory LLC2,271$289K0.0%N/A0.001%
8/7/2026 Abbot Financial Management Inc.11,877$1.50M0.5%N/A0.004%
8/6/2026 Nippon Life Global Investors Americas Inc.111,470$14.17M0.6%N/A0.037%
8/6/2026 Flputnam Investment Management Co.1,969$249K0.0%N/A0.001%
8/6/2026 Global Retirement Partners LLC11,300$1.43M0.0%N/A0.004%
8/6/2026 Fielder Capital Group LLC2,463$311K0.1%N/A0.001%
8/6/2026 Bank of New York Mellon Corp1,600,078$202.11M0.0%N/A0.538%
8/6/2026 Focus Partners Advisor Solutions LLC6,674$843K0.0%N/A0.002%
8/6/2026 GSA Capital Partners LLP2,116$267K0.0%N/A0.001%
7/10/2026 Tema ETFs LLC12,940$1.63M0.1%+9.8%0.004%
7/10/2026 Kentucky Trust Co17,465$2.21M1.1%-7.4%0.006%
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7/10/2026 E. Ohman J or Asset Management AB11,103$1.40M0.0%-12.6%0.004%
7/10/2026 Handelsbanken Fonder AB189,498$23.94M0.1%+24.4%0.064%
7/10/2026 Bay Colony Advisory Group Inc d b a Bay Colony Advisors6,677$843K0.1%-4.7%0.002%
7/10/2026 Wealthcare Advisory Partners LLC8,501$1.07M0.0%-12.3%0.003%
7/9/2026 Asset Advisory Group Inc.1,855$234K0.1%N/A0.001%
7/9/2026 Legacy Wealth Asset Management LLC3,231$408K0.1%N/A0.001%
7/9/2026 Allied Private Wealth LLC5,945$686K0.4%N/A0.002%
7/9/2026 Hennion & Walsh Asset Management Inc.56,304$7.11M0.2%+10.3%0.019%
7/9/2026 Valeo Financial Advisors LLC1,920$243K0.0%N/A0.001%
7/8/2026 Gradient Investments LLC29,602$3.74M0.1%+12.0%0.010%
7/8/2026 Foresight Capital Management Advisors Inc.59,644$7.53M3.7%-12.7%0.020%
7/8/2026 Elevation Wealth Partners LLC283$36K0.0%+444.2%0.000%
7/8/2026 Czech National Bank84,687$10.70M0.1%+5.1%0.028%
7/8/2026 PensionDanmark Pensionsforsikringsaktieselskab68,465$8.65M0.1%+12.2%0.023%
7/7/2026 Mechanics Bank Trust Department9,042$1.14M0.1%-2.5%0.003%
7/7/2026 Dynamic Advisor Solutions LLC1,791$226K0.0%N/A0.001%
7/7/2026 GAMMA Investing LLC7,716$975K0.0%+16.5%0.003%
7/7/2026 Avior Wealth Management LLC6,615$836K0.0%-4.0%0.002%
7/7/2026 Harbor Investment Advisory LLC632$80K0.0%N/A0.000%
7/6/2026 Somerset Trust Co5,428$686K0.2%-4.4%0.002%
7/2/2026 Versant Capital Management Inc2,253$285K0.0%+29.4%0.001%
7/2/2026 CX Institutional5,489$693K0.0%-6.9%0.002%
6/18/2026Western Wealth Management LLC1,397$143K0.0%N/A0.000%
6/3/2026 CoreFirst Bank & Trust22,629$2.31M1.2%-0.9%0.008%
6/3/2026DV Trading LLC2,400$245K0.0%N/A0.001%
6/3/2026 Parallel Advisors LLC3,857$394K0.0%+23.2%0.001%
6/3/2026NewEdge Advisors LLC41,818$4.27M0.0%+66.4%0.014%
6/2/2026Optiver Holding B.V.1,369$140K0.0%N/A0.000%
5/26/2026Glenmede Trust Co. NA10,850$1.11M0.0%+4.2%0.004%
5/22/2026 Verus Capital Partners LLC8,701$889K0.1%-15.3%0.003%
5/21/2026Essential Partners LLC561$57K0.0%+24.4%0.000%
5/19/2026Western Wealth Management LLC1,397$143K0.0%N/A0.000%
5/19/2026 Royal Fund Management LLC15,649$1.60M0.2%-66.0%0.005%
5/19/2026Bank of America Corp DE1,399,375$142.93M0.0%-7.3%0.470%
5/19/2026Edgestream Partners L.P.20,057$2.05M0.1%N/A0.007%
5/19/2026Anson Funds Management LP42,200$4.31M0.4%N/A0.014%
5/19/2026Janus Henderson Group PLC33,266$3.40M0.0%-12.5%0.011%
5/19/2026Centaurus Financial Inc.7,115$727K0.0%-1.4%0.002%
5/19/2026Oddo BHF Asset Management Sas9,183$938K0.0%-8.8%0.003%
5/19/2026Bull Harbor Capital LLC3,507$358K0.1%N/A0.001%
5/19/2026Arkadios Wealth Advisors7,386$754K0.0%-4.7%0.002%
5/18/2026Amundi1,091,574$111.49M0.0%-18.2%0.367%
5/18/2026Adelante 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%
5/18/2026California State Teachers Retirement System422,871$43.19M0.0%-2.6%0.142%
5/18/2026Royal Bank of Canada1,410,720$144.09M0.0%+9.7%0.474%
5/18/2026Empowered Funds LLC23,082$2.36M0.0%+198.8%0.008%
5/16/2026The Manufacturers Life Insurance Company173,470$17.72M0.0%-3.6%0.058%
5/16/2026Quantinno Capital Management LP322,017$32.89M0.1%+92.7%0.108%
5/16/2026BROOKFIELD Corp ON188,255$19.23M0.0%+31.4%0.063%
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5/15/2026Cardiff Park Advisors LLC2,725$278K0.0%N/A0.001%
5/15/2026 Gateway Wealth Partners LLC4,017$410K0.0%N/A0.001%
5/15/2026OMERS ADMINISTRATION Corp13,362$1.37M0.0%+27.6%0.004%
5/15/2026Waverly Advisors LLC36,018$3.68M0.0%+4.6%0.012%
5/15/2026Wealth Alliance LLC2,801$286K0.0%N/A0.001%
5/15/2026Epoch Investment Partners Inc.616,513$62.97M0.4%-2.1%0.207%
5/15/2026Entropy Technologies LP26,399$2.70M0.1%+370.2%0.009%
5/14/2026Healthcare of Ontario Pension Plan Trust Fund214,886$21.95M0.0%+1,739.0%0.072%
5/14/2026Dai ichi Life Insurance Company Ltd12,754$1.30M0.0%-2.6%0.004%
5/14/2026Renaissance Technologies LLC2,400$245K0.0%N/A0.001%


IRM Institutional Ownership - Frequently Asked Questions

During the previous two years, 1,136 institutional investors and hedge funds held shares of Iron Mountain. The most heavily invested institutionals were BlackRock Inc. ($4.24B), 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), and Dimensional Fund Advisors LP ($464.93M).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 929 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: BlackRock Inc. ($33.57M), Norges Bank ($11.85M), Wealthfront Advisers LLC ($6.87M), UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC ($5.38M), Cohen & Steers Inc. ($3.16M), Deutsche Bank AG ($3.05M), and Invesco Ltd. ($2.95M).

Institutional investors have bought a total of 78,541,453 shares in the last 24 months. This purchase volume represents approximately $8.66B in transactions.

Of the 443 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 18,698,300 shares in the last 24 months. This volume of shares sold represents approximately $1.72B in transactions.


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Institutional ownership data for NYSE:IRM is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/10/2026. New 13F filings are added each quarter as they're published.
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