IRON MOUNTAIN INC

IRMNYSE

$113.39+2.26 (+2.03%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

IRON MOUNTAIN INC price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+9.8%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	11.28%	$4.24B	0.06%	Not reported
Vanguard Portfolio Management LLC	8.59%	$3.23B	0.15%	Not reported
Vanguard Capital Management LLC	6.37%	$2.39B	0.05%	Not reported
State Street Corp	5.92%	$2.24B	0.07%	Not reported
Cohen & Steers, Inc.	4.04%	$1.52B	2.40%	Reduce 25.66%
Geode Capital Management, LLC	2.91%	$1.09B	0.06%	Not reported
FMR LLC	2.64%	$994M	0.04%	Not reported
Dimensional Fund Advisors LP	1.55%	$584M	0.11%	Not reported
Morgan Stanley	1.49%	$559M	0.03%	Not reported
Principal Financial Group Inc	1.47%	$552M	0.27%	Not reported
Charles Schwab Investment Management Inc	1.43%	$539M	0.07%	Not reported
Northern Trust Corp	1.42%	$533M	0.06%	Not reported
Norges Bank	1.42%	$532M	0.05%	Not reported
Invesco Ltd.	1.37%	$514M	0.04%	Not reported
Legal & General Group Plc	1.09%	$410M	0.09%	Not reported
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	1.07%	$403M	0.07%	Not reported
Deutsche Bank Ag\	1.02%	$385M	0.11%	Not reported
Goldman Sachs Group Inc	0.95%	$357M	0.03%	Not reported
Centersquare Investment Management LLC	0.78%	$294M	2.51%	Add 0.60%
Nuveen, LLC	0.75%	$280M	0.07%	Not reported
JPMorgan Chase & Co	0.74%	$288M	0.02%	Not reported
AQR Capital Management LLC	0.71%	$267M	0.09%	Not reported
Prudential Financial Inc	0.66%	$249M	0.27%	Not reported
Vontobel Holding Ltd.	0.64%	$242M	0.77%	Reduce 9.32%
Daiwa Securities Group Inc.	0.63%	$235M	0.46%	Reduce 40.09%
Ameriprise Financial Inc	0.56%	$211M	0.04%	Not reported
Vanguard Fiduciary Trust Co	0.56%	$210M	0.05%	Not reported
Royal Bank of Canada	0.55%	$207M	0.03%	Not reported
Bank of New York Mellon Corp	0.54%	$202M	0.03%	Not reported
Duff & Phelps Investment Management Co	0.49%	$184M	1.73%	Reduce 7.61%
Russell Investments Group, Ltd.	0.47%	$177M	0.16%	Not reported
Contour Asset Management LLC	0.43%	$161M	3.81%	Reduce 11.78%
Capital World Investors	0.41%	$154M	0.02%	Reduce 34.81%
Amundi	0.39%	$148M	0.04%	Not reported
American Century Companies Inc	0.39%	$146M	0.06%	Not reported
DekaBank Deutsche Girozentrale	0.38%	$114M	0.19%	Not reported
Bank of America Corp	0.38%	$141M	0.01%	Not reported
Cbre Investment Management Listed Real Assets LLC	0.36%	$136M	1.89%	Reduce 13.33%
Mitsubishi UFJ Asset Management Co., Ltd.	0.33%	$124M	0.07%	Add 8.17%
UBS Group AG	0.31%	$116M	0.01%	Not reported
Sumitomo Mitsui Trust Group, Inc.	0.30%	$113M	0.06%	Reduce 3.98%
Swiss National Bank	0.28%	$106M	0.06%	Not reported
Pictet Asset Management Holding SA	0.27%	$103M	0.10%	Reduce 5.45%
Barclays PLC	0.25%	$93.9M	0.02%	Not reported
APG Asset Management US Inc.	0.24%	$85.8M	0.60%	Not reported
Sei Investments Co	0.23%	$88.1M	0.08%	Not reported
Aberdeen Group plc	0.23%	$87.3M	0.12%	Add 86.29%
PGGM Investments	0.23%	$85.3M	2.10%	Reduce 50.72%
Wells Fargo & Company	0.22%	$83.6M	0.01%	Not reported
BNP Paribas Financial Markets	0.22%	$81.9M	0.03%	Not reported

50 of 1,095 holders

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