Iron Mountain Incorporated
US ˙ NYSE ˙ US46284V1017

SecurityIRM / Iron Mountain Incorporated
InstitutionCIBC Private Wealth Group, LLC
Latest Disclosed Ownership677,651 shares
Latest Disclosed Value $ 56,211,138
CIBC Private Wealth Group, LLC reports 6.02% decrease in ownership of IRM / Iron Mountain Incorporated

On February 12, 2026 - CIBC Private Wealth Group, LLC filed a 13F-HR form disclosing ownership of 677,651 shares of Iron Mountain Incorporated (US:IRM) valued at $56,211,150 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 24, 2025 disclosing 721,087 shares of Iron Mountain Incorporated. This represents a change in shares of -6.02% during the quarter. The current value of the position is $84,475,974 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-02-12 2025-12-31 13F IRON MTN INC DEL COM 46284V101 677,651 -43,436 -6.02 56,211 -23.53 0.0950
2025-11-24 2025-09-30 13F IRON MTN INC DEL COM 46284V101 721,087 -12,162 -1.66 73,508 -2.26 0.1258
2025-08-12 2025-06-30 13F IRON MTN INC DEL COM 46284V101 733,249 -3,606 -0.49 75,209 32.68 0.1343
2025-05-14 2025-03-31 13F IRON MTN INC DEL COM 46284V101 736,855 -279,321 -27.49 56,686 -45.76 0.1197
2025-02-12 2024-12-31 13F Iron Mountain COM 46284V101 1,016,176 -8,767 -0.86 104,514 -14.19 0.1895
2024-11-13 2024-09-30 13F Iron Mountain COM 46284V101 1,024,943 -24,273 -2.31 121,794 24.99 0.2183
2024-08-09 2024-06-30 13F Iron Mountain COM 46284V101 1,049,216 -7,591 -0.72 97,441 15.92 0.1828
2024-05-10 2024-03-31 13F Iron Mountain COM 46284V101 1,056,807 -21,794 -2.02 84,058 11.36 0.1647
2024-02-13 2023-12-31 13F IRON MTN INC DEL COM COM 46284V101 1,078,601 -22,278 -2.02 75,480 15.33 0.1599
2023-11-13 2023-09-30 13F IRON MTN INC DEL COM COM 46284V101 1,100,879 -153,184 -12.22 65,447 -8.15 0.1549
2023-11-21 2023-06-30 13F/A-1 IRON MTN INC DEL COM COM 46284V101 1,254,063 63,315 5.32 71,256 -10.23 0.1558
2023-08-10 2023-06-30 13F IRON MTN INC DEL COM COM 46284V101 1,250,930 60,182 71,078 0.1554
2023-11-21 2023-03-31 13F/A-1 IRON MTN INC NEW COM COM 46284V101 1,190,748 2,726 0.23 79,373 680.77 0.1757
2023-05-12 2023-03-31 13F IRON MTN INC NEW COM COM 46284V101 1,190,748 2,726 79,373 0.1725
2023-06-01 2022-12-31 13F/A-2 IRON MTN INC NEW COM COM 46284V101 1,188,022 -43,042 -3.50 10,167 -81.22 0.0341
2023-02-14 2022-12-31 13F/A-1 IRON MTN INC DEL COM COM 46284V101 1,188,022 -43,042 59,223 0.1240
2023-02-13 2022-12-31 13F IRON MTN INC DEL COM COM 46284V101 1,188,022 -43,042 59,223 0.0001
2022-11-15 2022-09-30 13F IRON MTN INC DEL COM COM 46284V101 1,231,064 20,336 1.68 54,131 -8.17 0.1458
2022-08-03 2022-06-30 13F IRON MTN INC COM 46284V101 1,210,728 475,137 64.59 58,950 44.63 0.1531
2022-05-16 2022-03-31 13F IRON MTN INC COM 46284V101 735,591 675,695 1,128.11 40,760 1,200.57 0.0890
2022-04-04 2021-12-31 13F/A-1 IRON MTN INC COM 46284V101 59,896 40,364 206.66 3,134 269.14 0.0065
2022-02-08 2021-12-31 13F IRON MTN INC COM 46284V101 59,896 40,364 3,134 0.0065
2021-11-12 2021-09-30 13F IRON MTN INC COM 46284V101 19,532 -5,676 -22.52 849 -20.43 0.0020
2021-08-16 2021-06-30 13F IRON MTN INC COM 46284V101 25,208 -369 -1.44 1,067 12.67 0.0025
2021-05-12 2021-03-31 13F IRON MTN INC COM 46284V101 25,577 -154 -0.60 947 24.77 0.0024
2021-02-12 2020-12-31 13F IRON MTN INC COM 46284V101 25,731 -18,338 -41.61 759 -34.68 0.0020
2020-11-03 2020-09-30 13F/A-1 IRON MTN INC COM 46284V101 44,069 44,069 1,162 0.0036
2020-10-29 2020-09-30 13F IRON MTN COMMON STOCK, R 46284V101 10,102 10,102 271 11,910.7843
2020-08-13 2020-06-30 13F IRON MTN INC COM 46284V101 0 -42,524 -100.00 0 -100.00
2020-05-15 2020-03-31 13F IRON MTN INC COM 46284V101 42,524 28,623 205.91 1,012 128.44 0.0043
2020-01-30 2019-12-31 13F IRON MTN INC COM 46284V101 13,901 1,550 12.55 443 10.75 0.0014
2019-10-16 2019-09-30 13F IRON MTN INC COM 46284V101 12,351 0 0.00 400 3.36 0.0014
2019-07-31 2019-06-30 13F IRON MTN INC COM 46284V101 12,351 143 1.17 387 -10.62 0.0014
2019-05-10 2019-03-31 13F IRON MTN INC COM 46284V101 12,208 107 0.88 433 10.46 0.0017
2019-02-05 2018-12-31 13F IRON MTN INC COM 46284V101 12,101 -37 -0.30 392 -6.44 0.0017
2018-11-14 2018-09-30 13F IRON MTN INC COM 46284V101 12,138 37 0.31 419 -1.18 0.0016
2018-08-02 2018-06-30 13F IRON MTN INC COM 46284V101 12,101 0 0.00 424 6.53 0.0017
2018-05-17 2018-03-31 13F IRON MTN INC COM 46284V101 12,101 841 7.47 398 -6.35 0.0017
2018-02-12 2017-12-31 13F IRON MTN INC COM 46284V101 11,260 0 0.00 425 -2.97 0.0018
2017-12-21 2017-09-30 13F/A-1 IRON MOUNTAIN INC COMNPV COM 46284V101 11,260 11,260 438 0.0020
2017-11-14 2017-09-30 13F IRON MOUNTAIN INC COMNPV COM 46284V101 11,260 438 0.0020
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.