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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 2025 vs. Q1 2025

How the institutions holding Iron Mountain Inc changed between Q1 2025 and Q2 2025.

All holders in Q2 2025All holders in Q1 2025

13F holders of IRM: Q1 2025 compared with Q2 2025
MeasureQ1 2025Of which not filed for Q2 2025Q2 2025Change
Holders99591,045+59
Shares245.2M387.2K248.8M+4.03M (+1.6%)
Value$21.1B$33.3M$25.5B+$4.48B (+21.3%)

9 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (121)

Institutions that held Iron Mountain Inc at the end of Q2 2025 but not at the end of Q1 2025.

Showing the largest 100 of 121 by value.

Institutions new to IRM in Q2 2025
InstitutionSharesValue% of portfolio
Zurich Insurance Group Ltd513,791$52.7M0.41%
Gillson Capital LP369,137$37.9M2.89%
Swedbank AB315,060$32.3M0.04%
Intrinsic Edge Capital Management LLC184,841$19.0M2.86%
La Banque Postale Asset Management SA114,471$11.7M0.17%
Weiss Asset Management LP108,426$11.1M0.18%
Bamco Inc107,524$11.0M0.03%
Sora Investors LLC95,977$9.84M0.89%
HRT Financial LP83,708$8.59M0.04%
Thompson Siegel & Walmsley LLC66,200$6.79M0.11%
Brevan Howard Capital Management LP61,532$6.31M0.07%
Point72 Asia (Singapore) Pte. Ltd.26,307$2.70M0.48%
Fox Run Management, L.L.C.25,922$2.66M0.44%
Jain Global LLC22,776$2.34M0.04%
Mizuho Securities USA LLC20,386$2.09M0.04%
Aster Capital Management (DIFC) Ltd19,478$2.00M0.45%
MASTERINVEST Kapitalanlage GmbH18,437$1.89M0.20%
Avanza Fonder AB16,925$1.74M0.05%
Walleye Trading LLC15,285$1.57M0.04%
Coppell Advisory Solutions LLC13,061$1.34M0.16%
Arista Wealth Management, LLC12,301$1.26M0.17%
Glenview Trust Co11,005$1.13M0.02%
Wetherby Asset Management Inc10,271$1.05M0.05%
Glenmede Investment Management, LP9,653$990.1K0.01%
Two Sigma Securities, LLC8,798$902.4K0.11%
DRW Securities, LLC8,160$837.0K0.06%
Agf Management Ltd7,980$818.5K0.00%
Quantessence Capital LLC7,978$818.3K0.24%
Callan Family Office, LLC7,575$777.0K0.02%
Mangrove Partners7,088$727.0K0.08%
Paradigm Financial Partners, LLC7,048$722.9K0.08%
Ascent Group, LLC6,795$696.9K0.03%
Landscape Capital Management, L.L.C.6,742$691.5K0.05%
Global Retirement Partners, LLC6,586$675.5K0.02%
Group One Trading, L.P.6,543$671.1K0.02%
Hudson Bay Capital Management LP6,108$626.5K0.00%
Laurion Capital Management LP5,938$609.1K0.07%
Campbell & CO Investment Adviser LLC5,297$543.3K0.03%
Penobscot Investment Management Company, Inc.5,040$517.0K0.04%
Canada Post Corp Registered Pension Plan4,887$501.3K0.03%
CTC Alternative Strategies, Ltd.4,795$491.8K0.43%
Vestmark Advisory Solutions, Inc.4,644$476.3K0.01%
Secure Asset Management, LLC4,641$476.0K0.09%
Quest Investment Management LLC4,414$452.8K0.05%
GTS Securities LLC3,915$401.6K0.02%
Cresset Asset Management, LLC3,804$393.2K0.00%
SummitTX Capital, L.P.3,700$379.5K0.02%
Prosperity Consulting Group, LLC3,645$373.9K0.03%
Gsa Capital Partners LLP3,548$364.0K0.03%
Coastal Bridge Advisors, LLC3,453$354.1K0.03%
Diversified Trust Co3,452$354.1K0.01%
Empirical Financial Services, LLC d.b.a. Empirical Wealth Management3,405$349.3K0.01%
Aprio Wealth Management, LLC3,350$343.6K0.04%
Richmond Investment Services, LLC3,299$338.4K0.07%
Tiaa Trust, National Association3,145$322.6K0.00%
ICONIQ Capital, LLC2,792$286.4K0.00%
NorthCrest Asset Manangement, LLC2,826$284.5K0.01%
Stevens Capital Management LP2,769$284.0K0.08%
Syon Capital LLC2,736$280.6K0.02%
XTX Topco Ltd2,702$277.1K0.01%
Sagespring Wealth Partners, LLC2,685$275.4K0.01%
Retireful, LLC2,602$266.9K0.18%
Advisory Alpha, LLC2,550$261.6K0.01%
Atomi Financial Group, Inc.2,517$258.2K0.01%
Patton Fund Management, Inc.2,510$257.5K0.06%
Nwam LLC2,578$257.4K0.01%
HBK Sorce Advisory LLC2,419$248.1K0.01%
Maven Securities LTD2,406$246.8K0.06%
Wealth Alliance2,328$238.8K0.03%
Personal Cfo Solutions, LLC2,326$238.6K0.04%
Mayflower Financial Advisors, LLC2,290$234.9K0.03%
Commerzbank Aktiengesellschaft2,280$234.0K0.01%
Smith, Moore & Co.2,271$232.9K0.02%
Mystic Asset Management, Inc.2,231$228.8K0.06%
Community Bank & Trust, Waco, Texas2,200$226.0K0.05%
Saxony Capital Management, LLC2,136$219.0K0.17%
Stiles Financial Services Inc2,127$218.2K0.08%
Avidian Wealth Solutions, LLC2,108$216.3K0.01%
Balboa Wealth Partners2,106$216.0K0.04%
Valeo Financial Advisors, LLC2,088$214.2K0.01%
Texas Bank & Trust Co2,054$210.7K0.08%
Ignite Planners, LLC2,098$209.1K0.04%
Arkadios Wealth Advisors2,038$209.1K0.01%
Johnson Investment Counsel Inc2,033$208.5K0.00%
Wesbanco Bank Inc2,029$208.1K0.01%
Affinity Investment Advisors, LLC2,013$206.5K0.16%
Acadian Asset Management LLC2,009$206.0K0.00%
Freestone Grove Partners LP2,006$205.8K0.00%
Apriem Advisors2,000$205.1K0.02%
RW Investment Management LLC2,000$205.1K0.02%
Harbour Trust & Investment Management Co2,000$205.1K0.02%
Moneta Group Investment Advisors LLC1,963$201.4K0.00%
TPG Advisors LLC1,954$200.4K0.14%
Modera Wealth Management, LLC1,951$200.1K0.00%
Pegasus Asset Management, Inc.1,950$200.0K0.07%
Harvest Fund Management Co., Ltd1,800$185.0K0.01%
Headlands Technologies LLC1,122$115.1K0.01%
Strategic Wealth Partners, Ltd.1,109$113.8K0.01%
Richardson Financial Services Inc.1,025$102.4K0.07%
Kozak & Associates, Inc.1,000$99.3K0.02%

Sold out (62)

Institutions that held Iron Mountain Inc at the end of Q1 2025 and filed for Q2 2025 without it.

Institutions that sold out of IRM in Q2 2025
InstitutionShares, Q1 2025Value, Q1 2025
Lasalle Investment Management Securities LLC194,144$16.7M
Two Sigma Investments, LP175,533$15.1M
Cubist Systematic Strategies, LLC86,988$7.48M
Renaissance Technologies LLC85,763$7.38M
Banco Santander, S.A.77,016$6.63M
Bowen Hanes & Co Inc75,000$6.45M
Nomura Holdings Inc74,514$6.41M
Corebridge Financial, Inc.73,436$6.32M
FORA Capital, LLC36,263$3.12M
Algert Global LLC31,523$2.71M
CHB Investment Group, LLC29,175$2.51M
Ellsworth Advisors, LLC25,194$2.17M
Entropy Technologies, LP24,177$2.08M
Aigen Investment Management, LP23,104$1.99M
Quadrature Capital Ltd22,389$1.93M
Delphi Management Inc15,155$1.30M
Virtus Investment Advisers, Inc.14,385$1.24M
GWN Securities Inc.10,877$1.05M
Vontobel Holding Ltd.11,687$1.01M
Contravisory Investment Management, Inc.10,775$927.1K
TownSquare Capital, LLC10,096$868.7K
Heartland Bank & Trust Co9,492$816.7K
United Services Automobile Association7,308$621.9K
Neo Ivy Capital Management6,468$556.5K
Boothbay Fund Management, LLC6,385$549.4K
Dark Forest Capital Management LP4,994$429.7K
Farringdon Capital, Ltd.4,540$390.6K
Meiji Yasuda Asset Management Co Ltd.4,454$383.2K
Tradewinds, LLC.4,415$379.9K
M&G Plc4,376$376.3K
NCP Inc.4,298$369.8K
Aristeia Capital LLC3,640$313.2K
Clarius Group, LLC3,595$309.3K
Marex Group plc3,578$307.9K
Robinson Smith Wealth Advisors LLC3,425$294.7K
Blake Schutter Theil Wealth Advisors, LLC3,322$285.8K
Cypress Capital Group2,815$242.2K
Canandaigua National Bank & Trust Co2,700$232.3K
Advisor Resource Council3,419$230.5K
Belpointe Asset Management LLC2,476$213.1K
Arrowpoint Investment Partners (Singapore) Pte. Ltd.2,458$211.5K
Triasima Portfolio Management inc.2,450$210.8K
Argentarii, LLC2,333$200.7K
Peoples Bank1,235$106.3K
Hexagon Capital Partners LLC1,000$86.0K
Plante Moran Financial Advisors, LLC555$47.8K
Compass Wealth Management LLC525$45.2K
Richards, Merrill & Peterson, Inc.500$43.0K
Wayfinding Financial, LLC432$37.0K
Key Financial Inc251$21.6K
Quent Capital, LLC244$21.0K
Main Street Group, LTD200$17.2K
Global Wealth Strategies & Associates150$12.9K
Saudi Central Bank115$9.89K
Hoese & Co LLP100$8.60K
Carolinas Wealth Consulting LLC82$7.04K
Global Financial Private Client, LLC37$3.18K
MPWM Advisory Solutions, LLC10$860
Greenline Partners, LLC7$602
Ruedi Wealth Management, Inc.6$516
Bear Mountain Capital, Inc.4$363
GoalVest Advisory LLC4$344

Not filed for Q2 2025 yet (9)

Institutions that held Iron Mountain Inc at the end of Q1 2025 and haven't filed a 13F for Q2 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding IRM in Q1 2025 that haven't filed for Q2 2025
InstitutionShares, Q1 2025Value, Q1 2025
Credit Agricole S A200,767$17.3M
Sheaff Brock Investment Advisors, LLC111,304$9.58M
Rakuten Investment Management, Inc.26,840$2.28M
Mizuho Securities USA LLC23,520$2.02M
Glenmede Trust Co NA8,819$758.8K
Orion Portfolio Solutions, LLC8,657$744.9K
CAPROCK Group, Inc.5,298$462.0K
Lindbrook Capital, LLC1,113$95.8K
Sandy Spring Bank900$77.5K