Q3 2025 13F Holders as of 9/30/2025
-
Type / Class
-
Equity / Common Stock
-
Shares outstanding
-
295M
-
Number of holders
-
995
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Total 13F shares, excl. options
-
250M
-
Shares change
-
+985K
-
Total reported value, excl. options
-
$25.5B
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Value change
-
+$93.9M
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Put/Call ratio
-
1.09
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Number of buys
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426
-
Number of sells
-
-475
-
Price
-
$101.94
Significant Holders of IRON MOUNTAIN INC - Common Stock (IRM) as of Q3 2025
1,124 filings reported holding IRM - IRON MOUNTAIN INC - Common Stock as of Q3 2025.
IRON MOUNTAIN INC - Common Stock (IRM) has 995 institutional shareholders that have filed 13F forms with the Securities Exchange Commission (SEC).
These institutions hold a total of 250M shares
of 295M outstanding shares and own 84.55% of the company stock.
Largest 10 shareholders include VANGUARD GROUP INC (47.3M shares), BlackRock, Inc. (31.7M shares), STATE STREET CORP (17.1M shares), COHEN & STEERS, INC. (15.7M shares), GEODE CAPITAL MANAGEMENT, LLC (8.19M shares), FMR LLC (7.86M shares), Invesco Ltd. (5.07M shares), DIMENSIONAL FUND ADVISORS LP (4.35M shares), NORTHERN TRUST CORP (4.03M shares), and CHARLES SCHWAB INVESTMENT MANAGEMENT INC (3.67M shares).
This table shows the top 995 institutional shareholders of the company equity. This data is sourced directly from the SEC via 13F filings.
| 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.