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Iron Mountain Inc

IRM
Exchange
NYSE
Industry
Real Estate Investment Trusts
SEC CIK
0001020569

In the last 90 days, Iron Mountain Inc insiders filed 0 open-market purchases and 6 sales; 1,173 institutions reported holding it in 13F filings for Q2 2026, worth $32.4B in total; no superinvestor holds it.

Q2 2026 vs. Q1 2026

How the institutions holding Iron Mountain Inc changed between Q1 2026 and Q2 2026.

All holders in Q2 2026All holders in Q1 2026

13F holders of IRM: Q1 2026 compared with Q2 2026
MeasureQ1 2026Of which not filed for Q2 2026Q2 2026Change
Holders1,090101,173+93
Shares253.3M107.6K257.1M+3.96M (+1.6%)
Value$25.9B$11.0M$32.4B+$6.60B (+25.5%)

10 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (154)

Institutions that held Iron Mountain Inc at the end of Q2 2026 but not at the end of Q1 2026.

Showing the largest 100 of 154 by value.

Institutions new to IRM in Q2 2026
InstitutionSharesValue% of portfolio
Norges Bank4,214,697$532.4M0.05%
Voloridge Investment Management, LLC412,748$52.1M0.22%
SG Americas Securities, LLC284,584$35.9M0.02%
Summit Partners Public Asset Management, LLC235,567$29.8M0.77%
Gillson Capital LP137,932$17.4M1.03%
O'Neil Global Advisors, Inc.113,164$14.3M3.20%
D. E. Shaw & Co., Inc.109,823$13.9M0.01%
Nykredit A/S104,462$13.2M0.05%
Uniplan Investment Counsel, Inc.98,324$12.4M1.16%
Barometer Capital Management Inc.61,400$7.76M2.16%
Shelton Capital Management52,840$6.67M0.12%
Cinctive Capital Management LP42,348$5.35M0.21%
Jupiter Topco LLC33,266$4.20M0.00%
Munich Reinsurance Co Stock Corp in Munich32,749$4.14M0.09%
Elo Mutual Pension Insurance Co31,834$4.02M0.05%
Elevatus Welath Management29,662$3.75M0.91%
Canada Pension Plan Investment Board29,362$3.71M0.00%
Kentucky Retirement Systems18,521$2.34M0.06%
Connor, Clark & Lunn Investment Management Ltd.17,996$2.27M0.00%
Alps Advisors Inc17,427$2.20M0.01%
Dockside LLC12,932$1.63M0.38%
Global Retirement Partners, LLC11,300$1.43M0.02%
Anchor Bay Capital, Inc.11,681$1.42M0.77%
Union Bancaire Privee, UBP SA13,432$1.29M0.02%
CAPROCK Group, Inc.9,424$1.20M0.02%
Diversified Trust Co9,490$1.20M0.02%
Diversify Advisory Services, LLC8,550$1.09M0.02%
Transcend Wealth Collective, LLC8,053$1.02M0.07%
Genesee Capital Advisors, LLC7,623$962.9K0.30%
Ci Investments Inc.7,453$941.4K0.00%
WESPAC Advisors, LLC7,235$913.9K0.45%
Lee Financial Co6,960$879.1K0.11%
Garden State Investment Advisory Services LLC5,425$689.7K0.14%
Allied Private Wealth LLC5,945$686.5K0.44%
Radnor Capital Management, LLC5,279$666.8K0.09%
Stonebridge Financial Group, LLC4,824$613.0K0.08%
Freestone Grove Partners LP4,753$600.4K0.00%
Altshuler Shaham Ltd15,315$571.2K0.01%
Alpine Global Management, LLC4,150$524.2K0.09%
Algert Global LLC4,130$521.7K0.01%
MONECO Advisors, LLC4,056$512.3K0.03%
StoneX Group Inc.3,804$482.5K0.02%
FJ Capital Management LLC3,814$481.7K0.06%
Compass Capital Management, Inc3,800$480.0K0.03%
Moneta Group Investment Advisors LLC3,632$458.7K0.00%
Curbstone Financial Management Corp3,590$453.5K0.08%
Groesbeck Investment Management Corp3,284$415.0K0.66%
Legacy Wealth Asset Management, LLC3,231$408.2K0.09%
Aew Capital Management L P3,100$391.6K0.02%
SageView Advisory Group, LLC3,016$381.0K0.01%
Amplius Wealth Advisors, LLC2,954$373.1K0.03%
Change Path, LLC2,902$366.6K0.01%
Gladstone Institutional Advisory LLC2,826$357.0K0.01%
Dorsey Wright & Associates2,746$346.8K0.06%
Family Investment Center, Inc.2,729$344.7K0.06%
KC Investment Advisors, LLC2,546$321.6K0.06%
Kera Capital Partners, Inc.2,438$307.9K0.03%
MBL Wealth, LLC2,320$293.0K0.02%
Proficio Capital Partners LLC2,229$281.6K0.01%
Financial Engines Advisors L.L.C.2,229$281.5K0.00%
Birchcreek Wealth Management, LLC2,190$276.6K0.11%
Warner Group LLC2,186$276.1K0.07%
Gsa Capital Partners LLP2,116$267.0K0.02%
WealthPlan Investment Management, LLC2,052$259.2K0.01%
TPG Advisors LLC1,954$246.8K0.14%
Modera Wealth Management, LLC1,951$246.4K0.00%
First Foundation Advisors1,935$244.4K0.01%
Jackson Thornton Asset Management, LLC1,928$243.5K0.02%
SP Asset Management LLC1,926$243.3K0.02%
Valeo Financial Advisors, LLC1,920$242.6K0.01%
Elyxium Wealth, LLC1,906$240.7K0.03%
William John Sempolinski1,900$240.0K0.10%
Plan Group Financial, LLC1,890$238.7K0.05%
Mission Hills Financial Advisory, LLC1,889$238.6K0.10%
National Asset Management, Inc.1,822$236.8K0.01%
Howard Capital Management Inc.1,871$236.3K0.00%
Belpointe Asset Management LLC1,866$235.8K0.01%
Asset Advisory Group, Inc.1,855$234.3K0.10%
Quotient Wealth Partners, LLC1,825$230.5K0.01%
RMR Wealth Builders1,814$229.2K0.01%
Financial Advisory Service, Inc.1,812$228.9K0.01%
First City Capital Management, Inc.1,811$228.7K0.11%
Axxcess Wealth Management, LLC1,808$228.4K0.00%
Bingham Private Wealth, LLC1,803$227.7K0.16%
Pegasus Asset Management, Inc.1,800$227.4K0.06%
Summa Corp.1,800$227.4K0.07%
Unified Investment Management1,800$227.4K0.21%
Dynamic Advisor Solutions LLC1,791$226.2K0.01%
Wick Capital Partners, LLC1,789$226.0K0.03%
Lombard Odier Asset Management (Switzerland) SA1,784$225.3K0.01%
Catalyst Financial Partners LLC1,764$222.8K0.02%
Knightsbridge Asset Management, LLC1,754$221.5K0.03%
Pinnacle Wealth Management Advisory Group, LLC1,724$217.8K0.01%
Arrowstreet Capital, Limited Partnership1,722$217.5K0.00%
Channel Wealth LLC1,719$217.1K0.05%
Plato Investment Management Ltd1,725$216.6K0.01%
Caerus Investment Advisors, LLC1,704$215.2K0.07%
Portside Wealth Group, LLC1,692$213.7K0.02%
Capstone Wealth Management, LLC1,676$211.7K0.10%
Beck Mack & Oliver LLC1,674$211.4K0.00%

Sold out (61)

Institutions that held Iron Mountain Inc at the end of Q1 2026 and filed for Q2 2026 without it.

Institutions that sold out of IRM in Q2 2026
InstitutionShares, Q1 2026Value, Q1 2026
Epoch Investment Partners, Inc.616,513$63.0M
STRS Ohio287,817$29.4M
Hudson Bay Capital Management LP190,884$19.5M
SG Capital Management LLC163,636$16.7M
Qube Research & Technologies Ltd81,478$8.32M
PEAK6 LLC60,388$6.17M
Oak Thistle LLC53,641$5.48M
Anson Funds Management LP42,200$4.31M
Y-Intercept (Hong Kong) Ltd33,654$3.44M
Sage Capital Management, LLC26,692$2.73M
Jain Global LLC24,108$2.46M
Twinbeech Capital LP17,400$1.78M
Simplex Trading, LLC14,800$1.51M
Bleakley Financial Group, LLC12,119$1.24M
Golden State Equity Partners11,822$1.21M
Landscape Capital Management, L.L.C.9,839$1.00M
Quadrant Capital Group LLC6,576$671.7K
Aigen Investment Management, LP6,255$638.9K
Bridgewater Associates, LP4,694$479.4K
Flagship Harbor Advisors, LLC3,987$407.2K
Beverly Hills Private Wealth, LLC3,956$404.0K
Strategic Financial Concepts, LLC3,236$330.6K
TradeLink Capital LLC3,083$315.0K
Virtu Financial LLC3,006$307.0K
Investment House LLC2,800$286.0K
Allen Mooney & Barnes Investment Advisors LLC2,733$279.1K
Cardiff Park Advisors, LLC2,725$278.4K
Patriot Financial Group Insurance Agency, LLC2,716$277.4K
Patton Fund Management, Inc.2,663$272.0K
Evolve Private Wealth, LLC2,591$264.6K
Dynamic Technology Lab Private Ltd2,557$261.2K
DV Trading LLC2,400$245.1K
Armistice Capital, LLC2,351$240.1K
Quantbot Technologies LP2,233$228.1K
Silver Oak Securities, Inc2,091$213.6K
Waldron Private Wealth LLC2,023$206.6K
Quarry LP1,907$194.8K
Optiver Holding B.V.1,369$139.8K
GFS Advisors, LLC11,350$130.2K
Addison Advisors LLC972$99.2K
Avalon Trust Co700$71.5K
Global Wealth Strategies & Associates600$61.3K
Annis Gardner Whiting Capital Advisors, LLC553$56.5K
Wall Street Financial Group, Inc.452$46.2K
Wealth Preservation Advisors, LLC401$41.0K
True Link Financial Advisors, LLC400$40.9K
Twin Peaks Wealth Advisors, LLC282$28.8K
Palladiem, LLC215$23.4K
Opal Wealth Advisors, LLC196$20.0K
RMG Wealth Management LLC150$19.5K
Chung Wu Investment Group, LLC100$10.2K
Evermay Wealth Management LLC97$9.91K
Innovative Asset Advisors Group, LLC89$9.18K
Curio Wealth, LLC86$8.77K
Legacy Wealth Managment, LLC41$4.19K
United Community Bank37$3.78K
Clayton Financial Group LLC34$3.47K
Portus Wealth Advisors, LLC10$1.02K
TopTier Wealth Management, LLC9$919
Caitong International Asset Management Co., Ltd8$817
RWM Asset Management, LLC5$511

Not filed for Q2 2026 yet (10)

Institutions that held Iron Mountain Inc at the end of Q1 2026 and haven't filed a 13F for Q2 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding IRM in Q1 2026 that haven't filed for Q2 2026
InstitutionShares, Q1 2026Value, Q1 2026
CWM, LLC53,578$5.47M
Janus Henderson Group PLC33,266$3.40M
Skopos Labs, Inc.8,679$886.4K
U.S. Capital Wealth Advisors, LLC4,991$509.8K
Cfo Capital Management LLC3,874$395.7K
Charter Oak Capital Management, LLC2,862$292.3K
Financial Connections Group, Inc.177$18.0K
Red Tortoise LLC94$9.60K
Anfield Capital Management, LLC88$8.99K
Sunbelt Securities, Inc.22$2.25K