Iron Mountain Incorporated
MX ˙ BMV ˙ US46284V1017
SecurityMX:IRM1 / Iron Mountain Incorporated
InstitutionFirst Financial Corp /in/
Latest Disclosed Ownership1,500 shares
Latest Disclosed Value $ 153,210
First Financial Corp /in/ ownership in IRM1 / Iron Mountain Incorporated

On April 7, 2026 - First Financial Corp /in/ filed a 13F-HR form disclosing ownership of 1,500 shares of Iron Mountain Incorporated (MX:IRM1) valued at $153,210 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 13, 2026 disclosing 1,500 shares of Iron Mountain Incorporated. This represents a change in shares of 0.00% during the quarter.

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)
2026-04-07 2026-03-31 13F Iron Mountain Com 46284V101 1,500 0 0.00 153 23.39 0.0343
2026-01-13 2025-12-31 13F Iron Mountain Com 46284V101 1,500 0 0.00 124 -18.42 0.0268
2025-10-09 2025-09-30 13F Iron Mountain Com 46284V101 1,500 0 0.00 153 -0.65 0.0599
2025-07-09 2025-06-30 13F Iron Mountain Com 46284V101 1,500 0 0.00 154 18.60 0.0687
2025-04-10 2025-03-31 13F Iron Mountain Com 46284V101 1,500 0 0.00 129 -17.83 0.0624
2025-01-13 2024-12-31 13F Iron Mountain Com 46284V101 1,500 0 0.00 158 -11.80 0.0734
2024-10-24 2024-09-30 13F Iron Mountain Com 46284V101 1,500 0 0.00 178 32.84 0.0851
2024-07-11 2024-06-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 134 11.67 0.0685
2024-04-12 2024-03-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 120 15.38 0.0611
2024-01-16 2023-12-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 105 16.85 0.0534
2023-10-11 2023-09-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 89 4.71 0.0523
2023-07-14 2023-06-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 85 7.59 0.0546
2023-04-17 2023-03-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 79 6.76 0.0494
2023-01-17 2022-12-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 75 12.12 0.0459
2022-10-20 2022-09-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 66 -9.59 0.0443
2022-07-15 2022-06-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 73 -12.05 0.0480
2022-04-14 2022-03-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 83 6.41 0.0420
2022-01-14 2021-12-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 78 20.00 0.0476
2021-10-18 2021-09-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 65 3.17 0.0432
2021-07-15 2021-06-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 63 12.50 0.0419
2021-04-15 2021-03-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 56 27.27 0.0389
2021-01-15 2020-12-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 44 10.00 0.0324
2020-10-13 2020-09-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 40 2.56 0.0339
2020-07-15 2020-06-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 39 8.33 0.0333
2020-04-15 2020-03-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 36 -25.00 0.0331
2020-01-15 2019-12-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 48 -2.04 0.0349
2019-10-15 2019-09-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 49 4.26 0.0382
2019-07-15 2019-06-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 47 -11.32 0.0380
2019-04-12 2019-03-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 53 8.16 0.0396
2019-01-15 2018-12-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 49 -5.77 0.0395
2018-10-16 2018-09-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 52 -1.89 0.0341
2018-07-12 2018-06-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 53 8.16 0.0371
2018-04-17 2018-03-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 0 0.00 49 -14.04 0.0352
2018-01-16 2017-12-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 1,500 -550 -26.83 57 -28.75 0.0368
2017-10-13 2017-09-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 2,050 1,500 272.73 80 321.05 0.0523
2017-07-13 2017-06-30 13F IRON MOUNTAIN COMMON STOCK 46284V101 550 0 0.00 19 -5.00 0.0121
2017-04-18 2017-03-31 13F IRON MOUNTAIN COMMON STOCK 46284V101 550 550 20 0.0127
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.