IRMIron Mountain Inc

Real Estate Specialized REITs Other Specialized REITs

Active holders?Institutions that actively chose this stock. Index funds and mega-diversified platforms (filers holding 1500+ names) are stripped out; they hold it automatically, not by decision.

802

of 1078 total, index funds excluded

This quarter?Turnover of the active crowd vs the prior quarter: funds that opened a position vs funds that closed out entirely. The split shows texture: broad new interest vs a revolving door.

+158

106 out

Conviction?How big this position is inside the typical holder's own portfolio (median, in basis points). 1 bps is pocket lint they will not miss; 200+ bps is a bet they did real work on. Many holders at tiny weight is weaker than few holders at real weight.

2 bps

median holder weight: token bet

Streak?How many quarters in a row the active holder count has risen. Persistence, not a buy signal: long streaks are how names end up crowded.

consecutive rising quarters

The crowd, 2016 to now

active holders per quarter

2016Mar 2026

Holdings as of Mar 31, 2026, filed by May 16, 2026. Counts for the newest quarter keep settling for a few weeks as amendments land.

The tide

funds in (up) vs out (down)

Top holders

by reported value · $25.8B held

Fund	Value	Note
BlackRock, Inc.	$3.4B
VANGUARD PORTFOLIO MANAGEME…	$2.6B
VANGUARD CAPITAL MANAGEMENT…	$1.9B
STATE STREET CORP	$1.8B
COHEN & STEERS, INC.	$1.7B
GEODE CAPITAL MANAGEMENT, L…	$864M
FMR LLC	$764M
MORGAN STANLEY	$475M
PRINCIPAL FINANCIAL GROUP I…	$466M
DIMENSIONAL FUND ADVISORS LP	$465M

Tourists vs true believers

every holder a dot · right = bigger bet in their own book, up = patient money

Hover any dot for the fund and its bet size. Patience is measured from each filer's actual quarter-to-quarter turnover across our whole database.