Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
111,85 € ↑2,30 (2,10%)
2026-06-05
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionOne Capital Management, LLC
Latest Disclosed Ownership30,034 shares
Latest Disclosed Value $ 3,067,692
One Capital Management, LLC reports 1.54% decrease in ownership of I5M / Iron Mountain Incorporated

On May 12, 2026 - One Capital Management, LLC filed a 13F-HR form disclosing ownership of 30,034 shares of Iron Mountain Incorporated (DE:I5M) valued at $2,666,419 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 30,505 shares of Iron Mountain Incorporated. This represents a change in shares of -1.54% during the quarter. The current value of the position is $3,359,303 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)
2026-05-12 2026-03-31 13F Iron Mountain COM 46284V101 30,034 -471 -1.54 3,068 21.23 0.0839
2026-02-10 2025-12-31 13F Iron Mountain COM 46284V101 30,505 -1,152 -3.64 2,530 -21.60 0.0764
2025-11-14 2025-09-30 13F Iron Mountain COM 46284V101 31,657 -906 -2.78 3,227 -3.38 0.1030
2025-08-11 2025-06-30 13F Iron Mountain COM 46284V101 32,563 -1,175 -3.48 3,340 15.09 0.1156
2025-05-14 2025-03-31 13F Iron Mountain COM 46284V101 33,738 -16,656 -33.05 2,903 -45.20 0.0981
2025-02-06 2024-12-31 13F IRON MOUNTAIN INC COM 46284V101 50,394 -9,085 -15.27 5,297 -25.06 0.1753
2024-11-12 2024-09-30 13F IRON MOUNTAIN INC COM 46284V101 59,479 -2,752 -4.42 7,068 26.72 0.2254
2024-08-09 2024-06-30 13F IRON MOUNTAIN INC COM 46284V101 62,231 55,282 795.54 5,577 901.26 0.1899
2024-05-08 2024-03-31 13F IRON MOUNTAIN INC COM 46284V101 6,949 6,949 557 0.0202
2015-02-13 2014-12-31 13F Iron Mountain COM 462846106 0 -60 -100.00 0 -100.00
2014-11-12 2014-09-30 13F Iron Mountain COM 462846106 60 60 2 0.0007
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.