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Iron Mountain (IRM) Institutional Ownership

Iron Mountain logo
$114.96 +0.45 (+0.39%)
Closing price 10/12/2026 03:59 PM Eastern
Extended Trading
$115.10 +0.13 (+0.12%)
As of 04:03 AM 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)
577
Total
Institutional Inflows
(last 12 months)
$9.15B
Number of
Institutional Sellers
(last 12 months)
422
Total
Institutional Outflows
(last 12 months)
$1.58B
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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
10/9/2026Riversedge Advisors LLC2,345$260K0.0%N/A0.001%
10/9/2026Wedmont Private Capital4,994$564K0.0%+16.5%0.002%
10/9/2026Legacy Wealth Asset Management LLC3,630$403K0.1%+12.3%0.001%
10/9/2026LifeGoal Investments LLC1,931$214K0.1%N/A0.001%
10/9/2026GAMMA Investing LLC7,955$883K0.0%+3.1%0.003%
10/8/2026Farther Finance Advisors LLC16,101$1.79M0.0%+9.6%0.005%
10/8/2026Gradient Investments LLC28,928$3.21M0.0%-2.3%0.010%
10/8/2026Valeo Financial Advisors LLC2,034$226K0.0%+5.9%0.001%
10/7/2026Venture Visionary Partners LLC16,735$1.86M0.0%-51.4%0.006%
10/7/2026Elevation Wealth Partners LLC413$46K0.0%+45.9%0.000%
10/7/2026Wealth Enhancement Trust Services Inc.1,307$145K0.0%-10.5%0.000%
10/6/2026Moody National Bank Trust Division11,656$1.29M0.1%+3.8%0.004%
10/6/2026Bank of New Hampshire1,210$134K0.0%+33.0%0.000%
10/5/2026Pensionfund Sabic19,800$2.20M1.8%-2.5%0.007%
10/5/2026Pensionfund PDN40,300$4.47M1.8%-5.2%0.014%
10/5/2026Eastern Bank841$93K0.0%+14.4%0.000%
10/5/2026MassMutual Private Wealth & Trust FSB7,269$806K0.0%-2.3%0.002%
10/2/2026 CX Institutional4,971$552K0.0%-9.4%0.002%
10/2/2026 Versant Capital Management Inc2,450$272K0.0%+8.7%0.001%
10/1/2026 Sarver Vrooman Wealth Advisors610$68K0.0%N/A0.000%
10/1/2026 Coastline Trust Co1,640$182K0.0%-11.6%0.001%
9/23/2026QRG Capital Management Inc.71,225$9.00M0.1%+9.7%0.024%
9/22/2026Andra AP fonden81,952$10.35M0.1%+159.7%0.028%
9/17/2026Wellington Altus USA Inc.213$27K0.0%N/A0.000%
9/9/2026Sequoia Financial Advisors LLC12,408$1.57M0.0%+18.6%0.004%
9/9/2026Community Bank of Raymore17,301$2.19M1.2%+9.0%0.006%
9/9/2026National Pension Service454,815$57.45M0.0%+5.9%0.153%
9/9/2026Engineers Gate Manager LP5,614$709K0.0%-91.5%0.002%
9/9/2026Pinnacle Wealth Management Advisory Group LLC1,724$218K0.0%N/A0.001%
9/9/2026Integrated Wealth Concepts LLC16,688$2.11M0.0%+2.0%0.006%
9/9/2026RFG Advisory LLC16,910$2.14M0.0%-0.5%0.006%
9/9/2026NewEdge Advisors LLC56,273$7.11M0.0%+34.6%0.019%
9/9/2026IFP Advisors Inc2,729$345K0.0%+24.0%0.001%
9/9/2026Baird Financial Group Inc.47,658$6.02M0.0%+11.6%0.016%
9/9/2026One Charles Private Wealth Services LLC14,538$1.84M0.4%-2.9%0.005%
9/8/2026Allworth Financial LP74,559$9.42M0.0%-2.3%0.025%
9/8/2026Arizona State Retirement System85,291$10.77M0.1%+6.1%0.029%
9/8/2026Waverly Advisors LLC37,733$4.77M0.0%+4.8%0.013%
9/8/2026Nykredit A S104,462$13.20M0.0%N/A0.035%
9/4/2026Parkside Financial Bank & Trust4,184$528K0.0%+179.1%0.001%
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8/27/2026Corient Private Wealth LP216,659$27.37M0.0%+2.0%0.073%
8/26/2026Amundi1,168,430$147.58M0.0%+7.0%0.392%
8/26/2026Brown Financial Advisors2,580$326K0.1%+3.6%0.001%
8/26/2026HighTower Advisors LLC105,399$13.31M0.0%-0.2%0.035%
8/25/2026VIRGINIA RETIREMENT SYSTEMS ET Al441,803$55.80M0.3%N/A0.148%
8/23/2026Ameritas Advisory Services LLC18,870$2.38M0.0%+245.7%0.006%
8/23/2026Wedmont Private Capital4,288$521K0.0%+18.0%0.001%
8/23/2026Widmann Financial Services Inc.11,925$1.51M0.8%-1.6%0.004%
8/23/2026Ameliora Wealth Management Ltd.2,100$265K0.1%-32.3%0.001%
8/23/2026HB Wealth Management LLC15,577$1.97M0.0%+1.1%0.005%
8/23/2026Saudi Central Bank20,823$2.63M0.0%+90.8%0.007%
8/22/2026Compass Financial Management LLC527$66K0.0%N/A0.000%
8/22/2026AlphaGrep UK Ltd4,136$522K0.2%N/A0.001%
8/22/2026William John Sempolinski1,900$240K0.1%N/A0.001%
8/22/2026Markowski Investments267$34K0.0%N/A0.000%
8/22/2026Munich Reinsurance Co Stock Corp in Munich32,749$4.14M0.1%N/A0.011%
8/22/2026Raiffeisen Bank International AG54,892$7.13M0.1%-37.4%0.018%
8/22/2026Investor s Fiduciary Advisor Network LLC16,270$2.06M0.7%-21.1%0.005%
8/22/2026Syon Capital LLC8,540$1.08M0.0%+2.2%0.003%
8/22/2026TD Waterhouse Canada Inc.9,519$1.20M0.0%-10.3%0.003%
8/22/2026Concurrent Investment Advisors LLC11,121$1.41M0.0%+71.0%0.004%
8/22/2026NEOS Investment Management LLC110,692$13.98M0.1%+9.5%0.037%
8/21/2026Continuum Advisory LLC3,820$483K0.0%+12.0%0.001%
8/21/2026Nykredit A S118,721$15.00M0.0%N/A0.040%
8/21/2026B. Metzler seel. Sohn & Co. AG34,219$4.32M0.0%+23.0%0.011%
8/21/2026Natural Investments LLC3,569$450K0.1%-13.1%0.001%
8/21/2026Beacon Financial Advisory LLC10,443$1.32M0.3%-1.7%0.004%
8/21/2026Tsfg LLC440$56K0.0%N/A0.000%
8/21/2026Independence Bank of Kentucky5,399$682K0.1%-11.8%0.002%
8/20/2026Proficio Capital Partners LLC2,229$282K0.0%N/A0.001%
8/20/2026Renasant Bank1,638$207K0.1%N/A0.001%
8/20/2026Ancora Advisors LLC19,766$2.50M0.0%-5.4%0.007%
8/20/2026Sigma Planning Corp2,468$312K0.0%-7.7%0.001%
8/20/2026Benjamin Edwards Inc.21,006$2.65M0.0%-3.7%0.007%
8/20/2026GTS Securities LLC4,367$552K0.0%-40.4%0.001%
8/20/2026Northwestern Mutual Wealth Management Co.67,203$8.49M0.0%+0.8%0.023%
8/20/2026Wedbush Securities Inc.7,038$889K0.0%-21.9%0.002%
8/19/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC3,193,560$403.38M0.1%+29,674.0%1.073%
8/19/2026New Mexico Educational Retirement Board14,640$1.85M0.0%+5.8%0.005%
8/19/2026Royal London Asset Management Ltd.141,105$17.82M0.0%-1.1%0.047%
8/19/2026Mufg Securities Americas Inc.8,962$1.13M0.1%+9.5%0.003%
8/19/2026Van ECK Associates Corp86,504$10.93M0.0%+3.5%0.029%
8/19/2026Nissay Asset Management Corp Japan86,438$10.92M0.0%+2.0%0.029%
8/19/2026Wellington Management Group LLP512,906$64.79M0.0%+47.4%0.172%
8/19/2026Archer Investment Corp5,800$733K0.1%N/A0.002%
8/19/2026Kingsview Wealth Management LLC4,265$539K0.0%N/A0.001%
8/18/2026Beacon Pointe Advisors LLC13,845$1.75M0.0%N/A0.005%
8/18/2026Livforsakringsbolaget Skandia Omsesidigt1,461$185K0.0%N/A0.000%
8/18/2026Strait & Sound Wealth Management LLC8,038$1.02M0.4%N/A0.003%
8/18/2026Rakuten Investment Management Inc.48,661$6.32M0.0%N/A0.016%
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8/18/2026RB Capital Management LLC46,766$5.91M1.2%N/A0.016%
8/18/2026Glenview Trust Co11,016$1.39M0.0%N/A0.004%
8/18/2026Comprehensive Money Management Services LLC12,851$1.62M1.0%N/A0.004%
8/18/2026Empowered Funds LLC14,840$1.87M0.0%N/A0.005%
8/18/2026United Capital Financial Advisors LLC172,265$21.76M0.1%N/A0.058%
8/18/2026Caitlin John LLC595$75K0.0%N/A0.000%
8/18/2026Equitable Holdings Inc.5,770$729K0.0%N/A0.002%
8/18/2026Centaurus Financial Inc.6,589$832K0.0%N/A0.002%
8/18/2026Coastal Bridge Advisors LLC3,181$402K0.0%N/A0.001%
8/18/2026Public Employees Retirement System of Ohio422,586$53.38M0.2%N/A0.142%


IRM Institutional Ownership - Frequently Asked Questions

During the previous two years, 1,146 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 948 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), UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC ($8.56M), Wealthfront Advisers LLC ($6.87M), Legal & General Group Plc ($3.48M), Cohen & Steers Inc. ($3.16M), and Deutsche Bank AG ($3.05M).

Institutional investors have bought a total of 80,541,399 shares in the last 24 months. This purchase volume represents approximately $9.15B in transactions.

Of the 422 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 17,220,144 shares in the last 24 months. This volume of shares sold represents approximately $1.58B in transactions.


Related Companies

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 10/9/2026. New 13F filings are added each quarter as they're published.
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