Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
111,85 € ↑2,30 (2,10%)
2026-06-05
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionMeasured Wealth Private Client Group, LLC
Latest Disclosed Ownership4,366 shares
Latest Disclosed Value $ 445,943
Measured Wealth Private Client Group, LLC reports 33.09% decrease in ownership of I5M / Iron Mountain Incorporated

On May 13, 2026 - Measured Wealth Private Client Group, LLC filed a 13F-HR form disclosing ownership of 4,366 shares of Iron Mountain Incorporated (DE:I5M) valued at $387,613 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 6,525 shares of Iron Mountain Incorporated. This represents a change in shares of -33.09% during the quarter. The current value of the position is $488,337 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)
2026-05-13 2026-03-31 13F IRON MTN INC DEL COM 46284V101 4,366 -2,159 -33.09 446 -17.74 0.1218
2026-02-10 2025-12-31 13F IRON MTN INC DEL COM 46284V101 6,525 -1,307 -16.69 541 -32.21 0.1432
2025-11-14 2025-09-30 13F IRON MTN INC DEL COM 46284V101 7,832 -411 -4.99 798 -5.56 0.2152
2025-08-13 2025-06-30 13F IRON MTN INC DEL COM 46284V101 8,243 -290 -3.40 845 15.12 0.2530
2025-05-12 2025-03-31 13F IRON MTN INC DEL COM 46284V101 8,533 -815 -8.72 734 -25.25 0.2357
2025-01-27 2024-12-31 13F IRON MTN INC DEL COM 46284V101 9,348 -309 -3.20 983 -14.39 0.3175
2024-10-28 2024-09-30 13F IRON MTN INC DEL COM 46284V101 9,657 -864 -8.21 1,148 21.76 0.3838
2024-08-12 2024-06-30 13F IRON MTN INC DEL COM 46284V101 10,521 -1,087 -9.36 943 1.18 0.3312
2024-04-18 2024-03-31 13F IRON MTN INC DEL COM 46284V101 11,608 0 0.00 931 14.66 0.3252
2024-02-06 2023-12-31 13F IRON MTN INC DEL COM 46284V101 11,608 0 0.00 812 17.68 0.2993
2023-10-18 2023-09-30 13F IRON MTN INC DEL COM 46284V101 11,608 -267 -2.25 690 2.37 0.2775
2023-07-20 2023-06-30 13F IRON MTN INC DEL COM 46284V101 11,875 -3,789 -24.19 675 -18.60 0.2563
2023-05-01 2023-03-31 13F IRON MTN INC DEL COM 46284V101 15,664 0 0.00 829 6.15 0.3192
2023-01-23 2022-12-31 13F IRON MTN INC DEL COM 46284V101 15,664 -1,473 -8.60 781 3.45 0.3215
2022-10-27 2022-09-30 13F IRON MTN INC DEL COM 46284V101 17,137 -563 -3.18 754 -12.53 0.3331
2022-07-25 2022-06-30 13F IRON MTN INC COM 46284V101 17,700 -2,188 -11.00 862 -21.78 0.3806
2022-05-03 2022-03-31 13F IRON MTN INC COM 46284V101 19,888 -1,894 -8.70 1,102 -3.33 0.4051
2022-01-28 2021-12-31 13F IRON MTN INC COM 46284V101 21,782 -1,639 -7.00 1,140 11.98 0.4028
2021-11-01 2021-09-30 13F IRON MTN INC COM 46284V101 23,421 -31,918 -57.68 1,018 -56.53 0.3919
2021-08-05 2021-06-30 13F IRON MTN INC COM 46284V101 55,339 2,342 4.42 2,342 19.43 0.7454
2021-05-04 2021-03-31 13F IRON MTN INC COM 46284V101 52,997 4,226 8.66 1,961 36.37 0.6955
2021-01-20 2020-12-31 13F IRON MTN INC COM 46284V101 48,771 8,247 20.35 1,438 32.41 0.5989
2020-10-15 2020-09-30 13F IRON MTN INC COM 46284V101 40,524 3,887 10.61 1,086 13.60 0.5255
2020-08-03 2020-06-30 13F IRON MTN INC COM 46284V101 36,637 9,793 36.48 956 49.61 0.5578
2020-04-22 2020-03-31 13F IRON MTN INC COM 46284V101 26,844 -6,942 -20.55 639 -40.67 0.4975
2020-01-15 2019-12-31 13F IRON MTN INC COM 46284V101 33,786 5,055 17.59 1,077 15.68 0.7182
2019-10-11 2019-09-30 13F IRON MTN INC COM 46284V101 28,731 4,225 17.24 931 21.38 0.6019
2019-07-26 2019-06-30 13F IRON MTN INC COM 46284V101 24,506 24,506 767 0.4428
2019-02-07 2018-12-31 13F IRON MOUNTAIN INC COM COM 46284V101 0 -860 -100.00 0 -100.00
2018-11-14 2018-09-30 13F IRON MOUNTAIN INC COM COM 46284V101 860 860 30 0.0180
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.