Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
111,85 € ↑2,30 (2,10%)
2026-06-05
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionBoston Private Wealth Llc
Latest Disclosed Ownership2,822 shares
Latest Disclosed Value $ 288,238
Boston Private Wealth Llc reports 1.33% increase in ownership of I5M / Iron Mountain Incorporated

On April 17, 2026 - Boston Private Wealth Llc filed a 13F-HR form disclosing ownership of 2,822 shares of Iron Mountain Incorporated (DE:I5M) valued at $250,537 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 2,785 shares of Iron Mountain Incorporated. This represents a change in shares of 1.33% during the quarter. The current value of the position is $315,641 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)
2026-04-17 2026-03-31 13F IRON MTN INC DEL COM COM 46284V101 2,822 37 1.33 288 24.68 0.0190
2026-02-04 2025-12-31 13F IRON MTN INC DEL COM COM 46284V101 2,785 56 2.05 231 -16.91 0.0136
2025-11-06 2025-09-30 13F IRON MTN INC DEL COM COM 46284V101 2,729 -5,493 -66.81 278 -67.02 0.0150
2025-08-14 2025-06-30 13F IRON MTN INC DEL COM COM 46284V101 8,222 -1,658 -16.78 843 -0.82 0.0452
2025-05-14 2025-03-31 13F IRON MTN INC DEL COM COM 46284V101 9,880 -998 -9.17 850 -25.63 0.0349
2025-02-05 2024-12-31 13F IRON MTN INC DEL COM COM 46284V101 10,878 10,878 1,143 0.0214
2024-10-18 2024-09-30 13F IRON MTN INC DEL COM COM 46284V101 0 -15,139 -100.00 0 -100.00
2024-08-06 2024-06-30 13F IRON MTN INC DEL COM COM 46284V101 15,139 212 1.42 1,357 13.28 0.0336
2024-05-15 2024-03-31 13F IRON MTN INC DEL COM COM 46284V101 14,927 -7,946 -34.74 1,197 -25.19 0.0267
2024-01-30 2023-12-31 13F IRON MTN INC DEL COM COM 46284V101 22,873 -407 -1.75 1,601 15.69 0.0389
2023-10-23 2023-09-30 13F IRON MTN INC DEL COM COM 46284V101 23,280 -5,120 -18.03 1,384 -14.26 0.0304
2023-07-24 2023-06-30 13F IRON MTN INC DEL COM COM 46284V101 28,400 -3,266 -10.31 1,614 -3.70 0.0292
2023-05-12 2023-03-31 13F IRON MTN INC DEL COM COM 46284V101 31,666 -4,697 -12.92 1,675 -7.56 0.0234
2023-02-10 2022-12-31 13F Iron Mountain COM 46284V101 36,363 4,262 13.28 1,813 28.42 0.0245
2022-11-09 2022-09-30 13F Iron Mountain COM 46284V101 32,101 3,950 14.03 1,411 2.92 0.0206
2022-08-16 2022-06-30 13F Iron Mountain COM 46284V101 28,151 269 0.96 1,371 -11.26 0.0211
2022-05-13 2022-03-31 13F Iron Mountain COM 46284V101 27,882 11,155 66.69 1,545 76.57 0.0207
2022-02-15 2021-12-31 13F Iron Mountain COM 46284V101 16,727 -1,268 -7.05 875 11.89 0.0143
2021-11-09 2021-09-30 13F Iron Mountain COM 46284V101 17,995 12,543 230.06 782 240.00 0.0100
2021-08-13 2021-06-30 13F Iron Mountain COM 46284V101 5,452 -11,361 -67.57 230 -63.02 0.0029
2021-05-11 2021-03-31 13F Iron Mountain COM 46284V101 16,813 5,894 53.98 622 93.17 0.0087
2021-02-10 2020-12-31 13F Iron Mountain COM 46284V101 10,919 10,919 322 0.0047
2017-08-04 2017-06-30 13F Iron Mountain COM 46284V101 0 -11,478 -100.00 0 -100.00
2017-05-11 2017-03-31 13F Iron Mountain COM 46284V101 11,478 -1,700 -12.90 409 -4.44 0.0163
2017-02-15 2016-12-31 13F Iron Mountain COM 46284V101 13,178 52 0.40 428 -13.18 0.0177
2016-11-15 2016-09-30 13F/A-1 Iron Mountain COM 46284V101 13,126 6,179 88.94 493 77.98 0.0200
2016-11-14 2016-09-30 13F Iron Mountain COM 46284V101 6,947 0 277 0.0113
2016-08-01 2016-06-30 13F Iron Mountain COM 46284V101 6,947 6,947 277 0.0113
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.