Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
108,60 € ↓ -0,40 (-0,37%)
2026-05-29
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionOMERS ADMINISTRATION Corp
Latest Disclosed Ownership13,362 shares
Latest Disclosed Value $ 1,364,795
OMERS ADMINISTRATION Corp reports 27.56% increase in ownership of I5M / Iron Mountain Incorporated

On May 15, 2026 - OMERS ADMINISTRATION Corp filed a 13F-HR form disclosing ownership of 13,362 shares of Iron Mountain Incorporated (DE:I5M) valued at $1,186,278 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 10,475 shares of Iron Mountain Incorporated. This represents a change in shares of 27.56% during the quarter. The current value of the position is $1,451,113 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)
2026-05-15 2026-03-31 13F IRON MTN INC DEL COM 46284V101 13,362 2,887 27.56 1,365 57.14 0.0088
2026-02-13 2025-12-31 13F IRON MTN INC DEL COM 46284V101 10,475 0 0.00 869 -18.65 0.0062
2025-11-14 2025-09-30 13F IRON MTN INC DEL COM 46284V101 10,475 0 0.00 1,068 -0.65 0.0076
2025-08-13 2025-06-30 13F IRON MTN INC DEL COM 46284V101 10,475 0 0.00 1,074 19.20 0.0084
2025-05-14 2025-03-31 13F IRON MTN INC DEL COM 46284V101 10,475 -1,717 -14.08 901 -29.66 0.0079
2025-02-14 2024-12-31 13F IRON MTN INC DEL COM 46284V101 12,192 2,073 20.49 1,282 6.57 0.0112
2024-11-13 2024-09-30 13F IRON MTN INC DEL COM 46284V101 10,119 0 0.00 1,202 32.67 0.0111
2024-08-13 2024-06-30 13F IRON MTN INC DEL COM 46284V101 10,119 10,119 907 0.0087
2016-05-12 2016-03-31 13F IRON MTN INC COM 46284V101 0 0 0 0.0000
2016-02-11 2015-12-31 13F IRON MTN INC COM 46284V101 0 -82,700 -100.00 0 -100.00
2015-11-12 2015-09-30 13F IRON MTN INC COM 46284V101 82,700 -52,200 -38.70 2,565 -38.67 0.0748
2015-08-11 2015-06-30 13F IRON MTN INC COM 46284V101 134,900 80,100 146.17 4,182 109.20 0.1661
2015-05-12 2015-03-31 13F IRON MTN INC COM 46284V101 54,800 54,800 1,999 0.0750
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.