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Iron Mountain Inc. (IRM)
NYSE:IRM
US Market

Iron Mountain (IRM) Ownership - Who Owns Iron Mountain?

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Iron Mountain (IRM) Ownership Overview

0.76%26.11%16.82%29.14%27.17%
16.82% Other Institutional Investors
29.14% ETFs
27.17% Public Companies and Individual Investors
The ownership structure of Iron Mountain (IRM) stock is a mix of institutional, retail, and individual investors. Approximately 72.07% of the company’s stock is owned by Institutional Investors, 0.76% is owned by Insiders, and 27.17% is owned by Public Companies and Individual Investors.
The ownership structure of Iron Mountain (IRM) stock is a mix of institutional, retail, and individual investors. Approximately 42.93% of the company’s stock is owned by Institutional Investors, 0.76% is owned by Insiders, and 29.14% is owned by Public Companies and Individual Investors.

Recent Insider Trading Activity

Date
Name
Activity
Value
Nov 21, 2025
xxxxxxxxxxxxx
$2954
Jun 05, 2025
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$89973
Jun 03, 2025
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$6826961
Jun 03, 2025
xxxxxxxxxxxxx
$1702025

Recent Hedge Fund Trading Activity

Date
Firm
Activity
Value
Sep 30, 2025
xxxxxxxxxxxxx
$468618
Sep 30, 2025
xxxxxxxxxxxxx
$3971378
Sep 30, 2025
xxxxxxxxxxxxx
$32137298

Top Shareholders

Holder
# of Shares
Type
% Holding
Value
42,513,139Institution14.38%3,543,470,136
27,945,217Institution9.45%2,329,233,837
17,107,811Institution5.79%1,425,936,047
11,216,463Institution3.79%934,892,191
10,918,229Institution3.69%910,034,387
4,959,227Institution1.68%413,351,570
3,341,761Institution1.13%278,535,779
2,713,055Institution0.92%226,133,134
2,664,772Institution0.90%222,108,746
2,621,362Institution0.89%218,490,523

Top Mutual Fund Holders

Holder
# of Shares
Type
% Holding
Value
27,945,217Institution9.45%2,329,233,837
10,918,229Institution3.69%910,034,387
4,959,227Institution1.68%413,351,570
2,621,362Institution0.89%218,490,523
2,530,765Institution0.86%210,939,263
2,509,213Institution0.85%209,142,904
2,117,169Institution0.72%176,466,036
2,030,926Institution0.69%169,277,682
1,900,995Institution0.64%158,447,933
1,871,767Institution0.63%156,011,779

Top ETF Holders

Holder
# of Shares
Type
% Holding
Value
12,814,594Institution4.34%1,319,262,466
9,269,630Institution3.14%954,308,409
7,366,991Institution2.49%758,431,723
6,499,886Institution2.20%669,163,264
3,592,166Institution1.22%316,218,373
3,592,166Institution1.22%316,218,373
3,536,121Institution1.20%311,284,732
2,672,613Institution0.90%275,145,508
2,297,063Institution0.78%202,210,456
1,961,764Institution0.66%172,694,085

FAQ

Who Owns Iron Mountain Inc. (IRM)?
According to the latest TipRanks data, approximately 16.82% of the company's stock is held by institutional investors, 0.76% is held by insiders, and 27.17% is held by retail investors.
    What percentage of Iron Mountain Inc. (IRM) stock is held by institutional investors?
    According to the latest TipRanks data, approximately 16.82% of Iron Mountain Inc. (IRM) stock is held by institutional investors.
      What percentage of Iron Mountain Inc. (IRM) stock is held by retail investors?
      According to the latest TipRanks data, approximately 27.17% of Iron Mountain Inc. (IRM) stock is held by retail investors.
        Who owns the most shares of Iron Mountain Inc. (IRM)?
        Vanguard owns the most shares of Iron Mountain Inc. (IRM).
          What is the significance of the ownership structure for a publicly traded company?
          The ownership structure can impact the company's decision making, as large institutional investors may exert influence on the company's management and can also affect the company's stock price with their buying and selling patterns.