Security key
46284V101
- Type / Class
- Equity / Common Stock
- Shares outstanding
- 297,661,125
- Total 13F shares
- 250,099,173
- Share change
- +1,236,142
- Total reported value
- $25,501,731,178
- Put/Call ratio
- 109%
- Price per share
- $101.94
- Number of holders
- 1,008
- Value change
- +$119,529,096
- Number of buys
- 431
- Number of sells
- 481
Report period
Q3 2025
Institutions
1,008
Top holders
10
IRM full security history
Newer quarter: Q4 2025
Previous quarter: Q2 2025
IRON MOUNTAIN INC SEC filings
IRON MOUNTAIN INC company facts
Broader feeds
Reporting periods
Holder history for CUSIP 46284V101
Recent filing periods:
Top shareholders of IRM - IRON MOUNTAIN INC - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Clark H. Bailey |
3/4/5
|
Director |
0.09%
|
254,864
mixed-class rows
|
$33,317,345 | — | 01 Jul 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
16%
|
47,064,887
|
$4,827,445,460 | — | 30 Jun 2025 | |
| BlackRock, Inc. |
13F
|
Company |
11%
|
31,278,627
|
$3,208,248,813 | — | 30 Jun 2025 | |
| STATE STREET CORP |
13F
|
Company |
5.6%
|
16,809,643
|
$1,737,001,855 | — | 30 Jun 2025 | |
| COHEN & STEERS, INC. |
13F
|
Company |
4.6%
|
13,768,631
|
$1,412,226,000 | — | 30 Jun 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.7%
|
8,086,718
|
$826,191,741 | — | 30 Jun 2025 | |
| FMR LLC |
13F
|
Company |
2.3%
|
6,697,419
|
$686,954,248 | — | 30 Jun 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.4%
|
4,292,766
|
$440,311,003 | — | 30 Jun 2025 | |
| Invesco Ltd. |
13F
|
Company |
1.4%
|
4,289,583
|
$439,982,503 | — | 30 Jun 2025 | |
| NORGES BANK |
13F
|
Company |
1.4%
|
4,089,466
|
$419,456,528 | — | 30 Jun 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
1.4%
|
4,067,808
|
$417,235,068 | — | 30 Jun 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
1.2%
|
3,625,808
|
$371,899,127 | — | 30 Jun 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.2%
|
3,506,483
|
$359,660,248 | — | 30 Jun 2025 | |
| DEUTSCHE BANK AG\ |
13F
|
Company |
1.2%
|
3,429,481
|
$351,761,866 | — | 30 Jun 2025 | |
| Legal & General Group Plc |
13F
|
Company |
1.1%
|
3,283,276
|
$336,765,624 | — | 30 Jun 2025 | |
| Daiwa Securities Group Inc. |
13F
|
Company |
0.99%
|
2,954,927
|
$303,087,000 | — | 30 Jun 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.87%
|
2,584,856
|
$265,129,571 | — | 30 Jun 2025 | |
| Pictet Asset Management Holding SA |
13F
|
Company |
0.83%
|
2,475,671
|
$253,915,314 | — | 30 Jun 2025 | |
| Contour Asset Management LLC |
13F
|
Company |
0.78%
|
2,335,348
|
$239,536,645 | — | 30 Jun 2025 | |
| Capital World Investors |
13F
|
Company |
0.71%
|
2,117,169
|
$217,158,024 | — | 30 Jun 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.69%
|
2,054,789
|
$210,759,708 | — | 30 Jun 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.69%
|
2,042,795
|
$209,530,000 | — | 30 Jun 2025 | |
| CENTERSQUARE INVESTMENT MANAGEMENT LLC |
13F
|
Company |
0.68%
|
2,030,916
|
$208,311,054 | — | 30 Jun 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.66%
|
1,972,998
|
$202,370,548 | — | 30 Jun 2025 | |
| PRUDENTIAL FINANCIAL INC |
13F
|
Company |
0.65%
|
1,945,769
|
$199,577,526 | — | 30 Jun 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.63%
|
1,879,971
|
$192,828,620 | — | 30 Jun 2025 | |
| Russell Investments Group, Ltd. |
13F
|
Company |
0.61%
|
1,823,664
|
$187,032,634 | — | 30 Jun 2025 | |
| UBS Group AG |
13F
|
Company |
0.6%
|
1,800,227
|
$184,649,284 | — | 30 Jun 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.59%
|
1,747,476
|
$179,238,611 | — | 30 Jun 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.57%
|
1,705,824
|
$175,931,461 | — | 30 Jun 2025 | |
| Amundi |
13F
|
Individual |
0.54%
|
1,600,818
|
$159,457,480 | — | 30 Jun 2025 | |
| PGGM Investments |
13F
|
Individual |
0.53%
|
1,565,792
|
$160,603,000 | — | 30 Jun 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
0.5%
|
1,493,923
|
$153,231,682 | — | 30 Jun 2025 | |
| DUFF & PHELPS INVESTMENT MANAGEMENT CO |
13F
|
Company |
0.49%
|
1,472,579
|
$151,042,428 | — | 30 Jun 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.42%
|
1,249,442
|
$128,155,289 | — | 30 Jun 2025 | |
| Deutsche Girozentrale DekaBank |
13F
|
Individual |
0.38%
|
1,122,500
|
$114,825,000 | — | 30 Jun 2025 | |
| CBRE INVESTMENT MANAGEMENT LISTED REAL ASSETS LLC |
13F
|
Company |
0.36%
|
1,073,098
|
$110,067,662 | — | 30 Jun 2025 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
0.34%
|
1,014,379
|
$104,044,815 | — | 30 Jun 2025 | |
| Sumitomo Mitsui Trust Group, Inc. |
13F
|
Company |
0.31%
|
924,414
|
$94,817,144 | — | 30 Jun 2025 | |
| Swiss National Bank |
13F
|
Company |
0.3%
|
889,261
|
$91,211,501 | — | 30 Jun 2025 | |
| SEI INVESTMENTS CO |
13F
|
Company |
0.3%
|
885,080
|
$90,782,938 | — | 30 Jun 2025 | |
| HSBC HOLDINGS PLC |
13F
|
Company |
0.26%
|
784,296
|
$80,373,651 | — | 30 Jun 2025 | |
| CAPTRUST FINANCIAL ADVISORS |
13F
|
Company |
0.26%
|
769,181
|
$78,894,868 | — | 30 Jun 2025 | |
| Mitsubishi UFJ Asset Management Co., Ltd. |
13F
|
Company |
0.26%
|
766,588
|
$78,628,931 | — | 30 Jun 2025 | |
| AMERICAN CENTURY COMPANIES INC |
13F
|
Company |
0.25%
|
745,266
|
$76,441,934 | — | 30 Jun 2025 | |
| CIBC Private Wealth Group LLC |
13F
|
Company |
0.25%
|
733,249
|
$75,209,396 | — | 30 Jun 2025 | |
| Epoch Investment Partners, Inc. |
13F
|
Company |
0.23%
|
683,612
|
$70,118,083 | — | 30 Jun 2025 | |
| LPL Financial LLC |
13F
|
Company |
0.23%
|
673,596
|
$69,090,796 | — | 30 Jun 2025 | |
| WELCH & FORBES LLC |
13F
|
Company |
0.22%
|
668,938
|
$68,612,941 | — | 30 Jun 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
0.21%
|
627,040
|
$64,317,000 | — | 30 Jun 2025 |
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
1,008 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
250,099,173 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
1,012
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 |
|---|
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
1,032
Q3 2025 holders
1,008
Holder diff
-24
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 Value $ | Q3 2025 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* 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.
An asterisk sign (*) next to the price indicates that the price is likely invalid.