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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 8 sales; 1,173 institutions reported holding it in 13F filings for Q2 2026, worth $32.4B in total; no superinvestor holds it.

13F holders, Q2 2026

Institutional positions in Iron Mountain Inc as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
1,173
+93 vs. Q1 2026
Shares held
257.1M
+3.96M (+1.6%) vs. Q1 2026
Total value
$32.4B
+$6.60B (+25.5%) vs. Q1 2026
New holders
154
446 more added
Sold out
61
386 more reduced

10 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting IRM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2026: 1,173 institutions
Q1 2021: 630 institutionsQ2 2021: 687 institutionsQ3 2021: 711 institutionsQ4 2021: 754 institutionsQ1 2022: 777 institutionsQ2 2022: 767 institutionsQ3 2022: 743 institutionsQ4 2022: 782 institutionsQ1 2023: 790 institutionsQ2 2023: 817 institutionsQ3 2023: 831 institutionsQ4 2023: 891 institutionsQ1 2024: 938 institutionsQ2 2024: 967 institutionsQ3 2024: 1,056 institutionsQ4 2024: 1,067 institutionsQ1 2025: 995 institutionsQ2 2025: 1,045 institutionsQ3 2025: 1,017 institutionsQ4 2025: 1,011 institutionsQ1 2026: 1,090 institutionsQ2 2026: 1,173 institutions
Value heldQ2 2026: $32.4B
Q1 2021: $8.44BQ2 2021: $9.70BQ3 2021: $9.94BQ4 2021: $12.0BQ1 2022: $12.4BQ2 2022: $10.9BQ3 2022: $10.0BQ4 2022: $11.4BQ1 2023: $12.0BQ2 2023: $12.9BQ3 2023: $13.7BQ4 2023: $16.4BQ1 2024: $19.0BQ2 2024: $22.2BQ3 2024: $28.8BQ4 2024: $24.9BQ1 2025: $21.1BQ2 2025: $25.5BQ3 2025: $25.5BQ4 2025: $21.4BQ1 2026: $25.9BQ2 2026: $32.4B
Institutions holding IRM and their total value by quarter
QuarterHoldersValue
Q2 20261,173$32.4B
Q1 20261,090$25.9B
Q4 20251,011$21.4B
Q3 20251,017$25.5B
Q2 20251,045$25.5B
Q1 2025995$21.1B
Q4 20241,067$24.9B
Q3 20241,056$28.8B
Q2 2024967$22.2B
Q1 2024938$19.0B
Q4 2023891$16.4B
Q3 2023831$13.7B
Q2 2023817$12.9B
Q1 2023790$12.0B
Q4 2022782$11.4B
Q3 2022743$10.0B
Q2 2022767$10.9B
Q1 2022777$12.4B
Q4 2021754$12.0B
Q3 2021711$9.94B
Q2 2021687$9.70B
Q1 2021630$8.44B

Institutions, Q2 2026

Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q1 2026.

Institutions holding IRM in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Park Square Financial Group, LLC57$7.20K0.06%−12−17.4%Reduced
Farmers & Merchants Trust Co of Chambersburg PA58$7.00K0.00%00.0%Unchanged
Capital Analysts, LLC57$7.00K0.00%+57New
MJT & Associates Financial Advisory Group, Inc.55$6.95K0.00%00.0%Unchanged
Asset Dedication, LLC55$6.95K0.00%+30+120.0%Added
Bullseye Investment Management, LLC50$6.32K0.00%00.0%Unchanged
Mowery & Schoenfeld Wealth Management, LLC49$6.19K0.01%00.0%Unchanged
Wilkerson Advisory Group LLC49$6.19K0.00%+6+14.0%Added
Silver Grove Financial Group, Inc.46$5.81K0.00%+46New
Raffa Wealth Management, LLC43$5.43K0.00%+6+16.2%Added
1620 Investment Advisors, Inc.42$5.30K0.00%00.0%Unchanged
Copia Wealth Management42$5.30K0.00%00.0%Unchanged
South State Corp.41$5.18K0.00%+5+13.9%Added
Trust Co of Vermont37$4.67K0.00%+37New
Ares Financial Consulting, LLC35$4.42K0.00%00.0%Unchanged
Silicon Valley Capital Partners34$4.30K0.00%+27+385.7%Added
Commonwealth Retirement Investments LLC33$4.13K0.00%+33New
Cape Investment Advisory, Inc.31$3.92K0.00%+31New
Marquette Asset Management, LLC30$3.79K0.00%00.0%Unchanged
Hollencrest Capital Management29$3.66K0.00%00.0%Unchanged
Richard W. Paul & Associates, LLC28$3.54K0.00%00.0%Unchanged
Principia Wealth Advisory, LLC28$3.54K0.00%+1+3.7%Added
Holos Integrated Wealth LLC30$3.48K0.00%00.0%Unchanged
Persistent Asset Partners Ltd26$3.28K0.00%+26New
Downshift Financial, LLC26$3.28K0.00%+26New
Brown, Lisle/Cummings, Inc.25$3.16K0.00%−22−46.8%Reduced
Rialto Wealth Management, LLC25$3.16K0.00%+9+56.3%Added
Hughes Financial Services, LLC25$3.16K0.00%+17+212.5%Added
Planning Strategies Inc.24$3.03K0.00%+24New
Ogorek Anthony Joseph25$3.00K0.00%00.0%Unchanged
Johnson Financial Group, Inc.22$2.80K0.00%−50−69.4%Reduced
Fulcrum Asset Management LLP20$2.60K0.00%+20New
BOK Financial Private Wealth, Inc.20$2.53K0.00%+20New
Thurston, Springer, Miller, Herd & Titak, Inc.20$2.53K0.00%00.0%Unchanged
CBIZ Investment Advisory Services, LLC23$2.37K0.00%00.0%Unchanged
American Capital Advisory, LLC17$2.15K0.00%+4+30.8%Added
NBT Bank N A17$2.15K0.00%00.0%Unchanged
Bay Harbor Wealth Management, LLC17$2.15K0.00%+17New
FWL Investment Management, LLC17$2.15K0.00%+17New
West Paces Advisors Inc.17$2.15K0.00%+17New
Clark Wealth Partners15$1.90K0.00%00.0%Unchanged
Millstone Evans Group, LLC14$1.77K0.00%00.0%Unchanged
Burk Holdings LLC14$1.77K0.00%00.0%Unchanged
Buck Wealth Strategies, LLC14$1.77K0.00%+14New
Kilter Group LLC13$1.64K0.00%−2−13.3%Reduced
Aspect Partners, LLC12$1.52K0.00%−17−58.6%Reduced
TFC Financial Management12$1.52K0.00%+5+71.4%Added
Bokf, NA12$1.52K0.00%+12New
Financial Consulate, Inc10$1.26K0.00%00.0%Unchanged
Davis Capital Management10$1.26K0.00%+6+150.0%Added
Washington Trust Advisors, Inc.9$1.14K0.00%00.0%Unchanged
Capital Advisors, Ltd. LLC10$1.00K0.00%00.0%Unchanged
Quaker Wealth Management, LLC7$8850.00%00.0%Unchanged
Motco7$8840.00%+7New
Ameriflex Group, Inc.7$8840.00%+7New
Gs Investments, Inc.6$7580.00%00.0%Unchanged
Bare Financial Services, Inc6$7580.00%00.0%Unchanged
Provenance Wealth Advisors, LLC6$7580.00%+6New
Spectrum Wealth Advisory Group, LLC5$6370.00%+5New
Wolff Wiese Magana LLC5$6320.00%00.0%Unchanged
Morton Brown Family Wealth, LLC5$6320.00%+5New
Leonteq Securities AG4$5050.00%−3,360−99.9%Reduced
Raleigh Capital Management Inc.3$4220.00%00.0%Unchanged
Proathlete Wealth Management LLC3$3880.00%00.0%Unchanged
Colonial Trust Co3$3790.00%00.0%Unchanged
Plante Moran Financial Advisors, LLC3$3790.00%+3New
Strengthening Families & Communities, LLC3$3790.00%+3New
Sankala Group LLC2$2540.00%+2New
Beaird Harris Wealth Management, LLC2$2530.00%00.0%Unchanged
DecisionPoint Financial, LLC2$2440.00%00.0%Unchanged
Private Wealth Management Group, LLC1$1270.00%00.0%Unchanged
3 Factor Indexing, LLC1$1270.00%00.0%Unchanged
Highland Investment Advisors LLC1$1260.00%+1New
Epoch Investment Partners, Inc.0$00.00%−616,513−100.0%Sold out
STRS Ohio0$00.00%−287,817−100.0%Sold out
Hudson Bay Capital Management LP0$00.00%−190,884−100.0%Sold out
SG Capital Management LLC0$00.00%−163,636−100.0%Sold out
Qube Research & Technologies Ltd0$00.00%−81,478−100.0%Sold out
PEAK6 LLC0$00.00%−60,388−100.0%Sold out
Oak Thistle LLC0$00.00%−53,641−100.0%Sold out
Anson Funds Management LP0$00.00%−42,200−100.0%Sold out
Y-Intercept (Hong Kong) Ltd0$00.00%−33,654−100.0%Sold out
Sage Capital Management, LLC0$00.00%−26,692−100.0%Sold out
Jain Global LLC0$00.00%−24,108−100.0%Sold out
Twinbeech Capital LP0$00.00%−17,400−100.0%Sold out
Simplex Trading, LLC0$00.00%−14,800−100.0%Sold out
Bleakley Financial Group, LLC0$00.00%−12,119−100.0%Sold out
Golden State Equity Partners0$00.00%−11,822−100.0%Sold out
Landscape Capital Management, L.L.C.0$00.00%−9,839−100.0%Sold out
Quadrant Capital Group LLC0$00.00%−6,576−100.0%Sold out
Aigen Investment Management, LP0$00.00%−6,255−100.0%Sold out
Bridgewater Associates, LP0$00.00%−4,694−100.0%Sold out
Flagship Harbor Advisors, LLC0$00.00%−3,987−100.0%Sold out
Beverly Hills Private Wealth, LLC0$00.00%−3,956−100.0%Sold out
Strategic Financial Concepts, LLC0$00.00%−3,236−100.0%Sold out
TradeLink Capital LLC0$00.00%−3,083−100.0%Sold out
Virtu Financial LLC0$00.00%−3,006−100.0%Sold out
Investment House LLC0$00.00%−2,800−100.0%Sold out
Allen Mooney & Barnes Investment Advisors LLC0$00.00%−2,733−100.0%Sold out
Cardiff Park Advisors, LLC0$00.00%−2,725−100.0%Sold out