Iron Mountain Inc

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IRM·46284V101·US·REIT·Real Estate - REIT - Specialty-13D/G

IRM institutional ownership changes in Q2 2026: 166 institutions opened or added positions, 132 trimmed or exited. IRM (Iron Mountain Inc) is held by 296 institutional investors as of Q2 2026. Top institutional shareholders: BlackRock, Inc. ($4.2B), VANGUARD PORTFOLIO MANAGEMENT LLC ($3.2B), VANGUARD CAPITAL MANAGEMENT LLC ($2.4B). Net institutional sentiment: Mixed.

296

Holders

(30 Elite)

$28.1B

Total Value

56% (298)

Consensus

166 buying - 132 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)43

Insider (Form 4)65

Activist (13D/13G)26

Congressional (STOCK Act)53

Holder Quality

85

★★★★★

Elite

73

★★★★

Strong

13

★★★

Solid

51

★★

Below

10

★

Weak

Held by 296 funds

30 elite

Who's Trading

Source dates: Price Oct 22, 2026 · Insiders Oct 5, 2026 · Activists May 7, 2026 · Congress Jan 13, 2026

InsiderMLMeaney William LExercise 38K shOct 1, 2026

InsiderMLMeaney William LSell $1.6MOct 1, 2026

InsiderMWMcIntosh Greg WSell $554KOct 1, 2026

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Top Holders

Top Holders (296)History

AllNewIncreasedHeldDecreasedExitedFirst report

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	33.6M(+1.7%)	$4.2B	0.1%	+4.52%	32
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Increased	25.6M(+2.2%)	$3.2B	0.1%	+11.18%	39
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	19M(+1.0%)	$2.4B	0.1%	+11.49%	32
STATE STREET CORP	Increased	17.6M(+0.5%)	$2.2B	0.1%	+157.38%	32
GEODE CAPITAL MANAGEMENT, LLC	Increased	8.6M(+1.9%)	$1.1B	0.1%	+166.76%	32
FMR LLC	Increased	7.9M(+5.2%)	$994.4M	0.0%	+31.78%	34
DIMENSIONAL FUND ADVISORS LP	Increased	4.6M(+1.6%)	$584.3M	0.1%	+258.87%	38
MORGAN STANLEY	Decreased	4.4M(-4.8%)	$559.2M	0.0%	+27.70%	0
PRINCIPAL FINANCIAL GROUP INC	Decreased	4.4M(-4.2%)	$552.4M	0.3%	+31.96%	0
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Increased	4.3M(+6.2%)	$538.5M	0.1%	+149.55%	33
NORTHERN TRUST CORP	Increased	4.2M(+1.8%)	$533.4M	0.1%	+95.18%	32
Invesco Ltd.	Increased	4.1M(+3.7%)	$513.5M	0.0%	+46.65%	33
Legal & General Group Plc	Increased	3.2M(+3.5%)	$409.8M	0.1%	+103.41%	32
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	Increased	3.2M(+297x)	$403.4M	0.1%	-10.17%	50
DEUTSCHE BANK AG\	Decreased	3M(-1.4%)	$385.1M	0.1%	+118.44%	0
GOLDMAN SACHS GROUP INC	Increased	2.8M(+27.3%)	$356.5M	0.0%	+23.51%	39
CENTERSQUARE INVESTMENT MANAGEMENT LLC	Increased	2.3M(+0.6%)	$293.5M	2.5%	+36.56%	53
JPMORGAN CHASE & CO	Increased	2.2M(+4.2%)	$287.5M	0.0%	+5.31%	32
Nuveen, LLC	Increased	2.2M(+7.3%)	$280.3M	0.1%	+31.58%	33
AQR CAPITAL MANAGEMENT LLC	Increased	2.1M(+15.2%)	$266.5M	0.1%	+13.53%	35

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer