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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 $32.5B in total; no superinvestor holds it.

Key figures

Insider buysOpen market, last 90 days
0
Insider sellsLast 90 days, $18.1M in total
8
13F holdersQ2 2026, +93 vs. previous quarter
1,173
13F valueReported value at the end of Q2 2026
$32.5B
Superinvestors holdingAt the end of Q2 2026
0

Price chart

Superinvestors holding IRM, Q2 2026

Go to the superinvestors tab

No superinvestor reported holding IRM at the end of Q2 2026.

Latest insider trades

Open-market purchases and sales by Iron Mountain Inc insiders from Form 4, newest first.

See all insider trades
Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 2, 2026 (view filing)4:27 PM ETSep 11 dayMeaney William LPresident and CEOSSaleCommon Stock, par value $.01 per share−38.5K$114.08−$4.39M−100.0%0 after4 lots10b5-1
Sep 2, 2026 (view filing)4:22 PM ETSep 11 dayMcIntosh Greg WEVP, Chief Commercial OfficerSSaleCommon Stock, par value $.01 per share−5.00K$115.60−$578.0K−6.2%75.6K after10b5-1
Sep 2, 2026 (view filing)4:20 PM ETSep 11 dayKidd MarkEVP, GM Data Centers & ALMSSaleCommon Stock, par value $.01 per share−6.00K$115.60−$693.6K−5.9%95.5K after10b5-1
Aug 10, 2026 (view filing)4:12 PM ETAug 73 daysMeaney William LPresident and CEOSSaleCommon Stock, par value $.01 per share−38.5K$121.67−$4.68M−100.0%0 after3 lots10b5-1
Aug 10, 2026 (view filing)4:08 PM ETAug 73 daysKidd MarkEVP, GM Data Centers & ALMSSaleCommon Stock, par value $.01 per share−6.00K$122.70−$736.2K−5.6%101.5K after10b5-1
Aug 10, 2026 (view filing)4:03 PM ETAug 64 daysMcIntosh Greg WEVP, Chief Commercial OfficerSSaleCommon Stock, par value $.01 per share−11.8K$127.13−$1.51M−12.8%80.6K after2 lots10b5-1
Jul 2, 2026 (view filing)4:39 PM ETJul 11 dayMeaney William LPresident and CEOSSaleCommon Stock, par value $.01 per share−38.5K$122.83−$4.73M−100.0%0 after5 lots10b5-1
Jul 2, 2026 (view filing)4:30 PM ETJul 11 dayKidd MarkEVP, GM Data Centers & ALMSSaleCommon Stock, par value $.01 per share−6.00K$125.62−$753.7K−5.3%107.5K after10b5-1
Jun 2, 2026 (view filing)Jun 11 dayKidd MarkEVP, GM Data Centers & ALMSSaleCommon Stock, par value $.01 per share−6.00K$126.70−$760.2K−5.0%113.5K after10b5-1
Jun 2, 2026 (view filing)Jun 11 dayMeaney William LPresident and CEOSSaleCommon Stock, par value $.01 per share−38.5K$127.55−$4.91M−100.0%0 after5 lots10b5-1

Top 10 13F holders, Q2 2026

The largest institutional positions in Iron Mountain Inc at the end of Q2 2026; share changes are against Q1 2026.

See all 1,173 holders
Institutions holding IRM in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
BlackRock, Inc.33,570,910$4.24B0.06%+549,556+1.7%Added
Vanguard Portfolio Management LLC25,568,944$3.23B0.15%+553,387+2.2%Added
Vanguard Capital Management LLC18,953,705$2.39B0.05%+194,816+1.0%Added
State Street Corp17,634,044$2.24B0.07%+82,411+0.5%Added
Cohen & Steers, Inc.12,019,735$1.52B2.40%−4,149,606−25.7%Reduced
Geode Capital Management, LLC8,649,249$1.09B0.06%+163,122+1.9%Added
FMR LLC7,872,365$994.4M0.04%+387,967+5.2%Added
Dimensional Fund Advisors LP4,625,684$584.3M0.11%+73,398+1.6%Added
Morgan Stanley4,426,922$559.2M0.03%−225,325−4.8%Reduced
Principal Financial Group Inc4,373,424$552.4M0.27%−192,669−4.2%Reduced