IRON MOUNTAIN INC - Common Stock (IRM)

Q3 2025 13F Holders as of 30 Sep 2025

Type / Class
Equity / Common Stock
Shares outstanding
295,766,873
Total 13F shares
250,044,036
Share change
+1,237,417
Total reported value
$25,496,110,316
Put/Call ratio
109%
Price per share
$101.94
Number of holders
1,006
Value change
+$119,659,062
Number of buys
431
Number of sells
480

Institutional Holders of IRON MOUNTAIN INC - Common Stock (IRM) as of Q3 2025

As of 30 Sep 2025, IRON MOUNTAIN INC - Common Stock (IRM) was held by 1,006 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 250,044,036 shares. The largest 10 holders included VANGUARD GROUP INC, BlackRock, Inc., STATE STREET CORP, COHEN & STEERS, INC., GEODE CAPITAL MANAGEMENT, LLC, FMR LLC, Invesco Ltd., DIMENSIONAL FUND ADVISORS LP, NORTHERN TRUST CORP, and CHARLES SCHWAB INVESTMENT MANAGEMENT INC. This page lists 1,006 institutional shareholders reporting positions in this security for the Q3 2025 filing period.
Investor Option Weight % Change % Value $ * Price Shares Share Change Activity Report Period
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.