Institutional Ownership Iron Mountain Inc (IRM)
This table provides information about the institutional ownership of Iron Mountain Inc (IRM). We have compiled data on the 1,159 institutions that hold shares in the stock, with a total of 245 Million shares, which have been reported (via 13F filing form) to have a value of $22.4 Billion.
| Holding | Report Date | shares Held | Holding Value (Reported) | Last Trade | Trade History |
|---|---|---|---|---|---|
|
Wells Fargo & Company
San Francisco, CA |
Nov 13, 2025 Q3 2025 |
637,840
shares
|
$58.3 Million
0.01% of portfolio
|
Q3 2025
Added 1.98%
|
|
|
Rhumbline Advisers
Boston, MA |
Nov 06, 2025 Q3 2025 |
596,637
shares
|
$54.5 Million
0.05% of portfolio
|
Q3 2025
Reduced 3.75%
|
|
|
Price T Rowe Associates Inc
Baltimore, MD |
Nov 14, 2025 Q3 2025 |
595,595
shares
|
$54.4 Million
0.01% of portfolio
|
Q3 2025
Reduced 5.01%
|
|
|
Apg Asset Management Us Inc.
New York, NY |
Nov 12, 2025 Q3 2025 |
582,174
shares
|
$53.2 Million
0.45% of portfolio
|
Q1 2025
Added 13.22%
|
|
|
Alliancebernstein L.P.
New York, NY |
Nov 14, 2025 Q3 2025 |
555,994
shares
|
$50.8 Million
0.02% of portfolio
|
Q3 2025
Reduced 0.94%
|
|
|
Adage Capital Partners Gp, L.L.C.
Boston, MA |
Nov 14, 2025 Q3 2025 |
553,420
shares
|
$50.6 Million
0.09% of portfolio
|
Q3 2025
Reduced 1.22%
|
|
|
American Century Companies Inc
Kansas City, MO |
Nov 12, 2025 Q3 2025 |
552,049
shares
|
$50.4 Million
0.03% of portfolio
|
Q3 2025
Reduced 25.93%
|
|
|
Asset Management One Co., Ltd.
|
Oct 22, 2025 Q3 2025 |
551,714
shares
|
$50.4 Million
0.17% of portfolio
|
Q3 2025
Reduced 0.76%
|
|
|
Nomura Asset Management CO LTD
Tokyo, M0 |
Nov 12, 2025 Q3 2025 |
529,048
shares
|
$48.3 Million
0.14% of portfolio
|
Q3 2025
Added 2.19%
|
|
|
Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am Main
Frankfurt Am Main, 2M |
Nov 14, 2025 Q3 2025 |
515,006
shares
|
$47.1 Million
0.05% of portfolio
|
Q3 2025
Added 36.31%
|
|
|
California Public Employees Retirement System
Sacramento, CA |
Nov 14, 2025 Q3 2025 |
513,415
shares
|
$46.9 Million
0.03% of portfolio
|
Q3 2025
Added 3.95%
|
|
|
Credit Suisse Ag
Zurich, V8 |
May 10, 2024 Q1 2024 |
505,639
shares
|
$46.2 Million
0.04% of portfolio
|
Q1 2024
Reduced 5.24%
|
|
|
Universal Beteiligungs Und Servicegesellschaft Mb H
Frankfurt Am Main, 2M |
Oct 30, 2025 Q3 2025 |
497,720
shares
|
$45.5 Million
0.09% of portfolio
|
Q3 2025
Added 4.09%
|
|
|
National Pension Service
Jeonju Si, Jeollabuk Do, M5 |
Nov 03, 2025 Q3 2025 |
495,480
shares
|
$45.3 Million
0.04% of portfolio
|
Q3 2025
Added 4.06%
|
|
|
Israel Englander
Millennium Management LLC | New York, Ny
|
Nov 14, 2025 Q3 2025 |
485,417
shares
|
$44.4 Million
0.02% of portfolio
|
Q3 2025
Reduced 15.72%
|
|
|
Heitman Real Estate Securities LLC
Chicago, IL |
Nov 13, 2025 Q3 2025 |
474,368
shares
|
$43.3 Million
3.31% of portfolio
|
Q3 2025
Added 2.34%
|
|
|
Aqr Capital Management LLC
Greenwich, CT |
Nov 14, 2025 Q3 2025 |
457,472
shares
|
$41.8 Million
0.03% of portfolio
|
Q3 2025
Added 331.54%
|
|
|
Great West Life Assurance CO
Winnipeg, A2 |
Nov 17, 2025 Q3 2025 |
445,064
shares
|
$40.7 Million
0.06% of portfolio
|
Q3 2025
Added 1.69%
|
|
|
California State Teachers Retirement System
West Sacramento, CA |
Nov 14, 2025 Q3 2025 |
440,557
shares
|
$40.3 Million
0.05% of portfolio
|
Q3 2025
Reduced 2.57%
|
|
|
Bamco Inc
New York, NY |
Nov 14, 2025 Q3 2025 |
436,831
shares
|
$39.9 Million
0.13% of portfolio
|
Q3 2025
Added 306.26%
|
|
|
Citigroup Inc
|
Nov 10, 2025 Q3 2025 |
419,723
shares
|
$38.4 Million
0.02% of portfolio
|
Q3 2025
Added 105.33%
|
|
|
Neuberger Berman Group LLC
New York, NY |
Nov 12, 2025 Q3 2025 |
416,248
shares
|
$38 Million
0.03% of portfolio
|
Q3 2025
Added 14.16%
|
|
|
Rockefeller Capital Management L.P.
New York, NY |
Nov 14, 2025 Q3 2025 |
407,455
shares
|
$37.2 Million
0.09% of portfolio
|
Q3 2025
Added 7.54%
|
|
|
Bank Of Montreal
Toronto, A6 |
Nov 13, 2025 Q3 2025 |
398,180
shares
|
$36.4 Million
0.02% of portfolio
|
Q3 2025
Added 8.66%
|
|
|
Adelante Capital Management LLC
Alameda, CA |
Nov 14, 2025 Q3 2025 |
386,285
shares
|
$35.3 Million
2.66% of portfolio
|
Q3 2025
Reduced 4.2%
|
|