IRON MOUNTAIN INC
Total Trades
157
Buys
1
Sells
104
Largest Trade
N/A
Insiders
15
Institutional Funds
900
Inst. Value
$1M+
Activist Filings
14
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Borges Daniel | SVP & Chief Accoun… | EXERCISE | N/A | 820 | — | Mar 4, 2022 |
| Borges Daniel | SVP & Chief Accoun… | EXERCISE | N/A | 930 | — | Mar 2, 2022 |
| Borges Daniel | SVP & Chief Accoun… | SELL | $100K–$500K | 2K | $46.52 | Mar 2, 2022 |
| Meaney William L | President and CEO | SELL | $1M+ | 58K | $48.05 | Mar 2, 2022 |
| MARSON DEBORAH | EVP | SELL | $15K–$50K | 500 | $46.52 | Mar 1, 2022 |
| MARSON DEBORAH | EVP | EXERCISE | N/A | 12K | — | Mar 1, 2022 |
| MARSON DEBORAH | EVP | SELL | $15K–$50K | 500 | $46.38 | Jan 14, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 900 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| COHEN & STEERS, INC. | 18.9M | $1M+ | SH |
| STATE STREET CORP | 16.9M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 7.4M | $1M+ | SH |
| NORGES BANK | 4.4M | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 4.2M | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 3.9M | $1M+ | SH |
| Pictet Asset Management Holding SA | 2.3M | $1M+ | SH |
| CENTERSQUARE INVESTMENT MANAGEMENT LLC | 2.2M | $1M+ | SH |
| Capital World Investors | 2.1M | $1M+ | SH |
| PGGM Investments | 1.7M | $1M+ | SH |
| DUFF & PHELPS INVESTMENT MANAGEMENT CO | 1.6M | $1M+ | SH |
| CBRE INVESTMENT MANAGEMENT LISTED REAL ASSETS LLC | 1.4M | $1M+ | SH |
| DekaBank Deutsche Girozentrale | 1.1M | $1M+ | SH |
| Sumitomo Mitsui Trust Group, Inc. | 907K | $1M+ | SH |
| Mitsubishi UFJ Asset Management Co., Ltd. | 840K | $1M+ | SH |
| Swiss National Bank | 809K | $1M+ | SH |
| Point72 Asset Management, L.P. | 791K | $1M+ | SH |
| Nuveen, LLC | 729K | $1M+ | SH |
| BlackRock, Inc. | 700K | $1M+ | SH |
| WELCH & FORBES LLC | 656K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Feb 13, 2026
6.5%
19.1M shares
SC 13G · Nov 14, 2025
5.4%
16.0M shares
SC 13G/A · Mar 7, 2025
4.3%
12.8M shares
Cohen & Steers, Inc. 14-1904657
SC 13G/A · Nov 14, 2024
6.2%
18.0M shares
STATE STREET CORPORATION 04-2456637
SC 13G · Oct 17, 2024
5.7%
16.6M shares
SC 13G/A · Sep 10, 2024
10.2%
29.9M shares
Cohen & Steers, Inc. 14-1904657
SC 13G · Feb 14, 2024
7.8%
22.9M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
15.8%
46.3M shares
SC 13G/A · Jan 26, 2024
8.0%
23.3M shares
Capital World Investors 95-1411037
SC 13G/A · Dec 11, 2023
1.6%
4.6M shares
Capital World Investors 95-1411037
SC 13G/A · Feb 13, 2023
8.8%
25.5M shares
SC 13G/A · Jan 30, 2023
7.8%
22.6M shares
Capital World Investors 95-1411037
SC 13G/A · Feb 11, 2022
11.3%
32.7M shares
SC 13G/A · Feb 1, 2022
7.9%
23.0M shares