Iron Mountain Incorporated
US ˙ NYSE ˙ US46284V1017

SecurityIRM / Iron Mountain Incorporated
InstitutionTrinity Legacy Partners, LLC
Latest Disclosed Ownership38,864 shares
Latest Disclosed Value $ 4,431,710
Trinity Legacy Partners, LLC reports 1.63% decrease in ownership of IRM / Iron Mountain Incorporated

On April 16, 2026 - Trinity Legacy Partners, LLC filed a 13F-HR form disclosing ownership of 38,864 shares of Iron Mountain Incorporated (US:IRM) valued at $3,969,569 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 39,506 shares of Iron Mountain Incorporated. This represents a change in shares of -1.63% during the quarter. The current value of the position is $4,972,649 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)
2026-04-16 2026-03-31 13F IRON MTN INC DEL COM 46284V101 38,864 -642 -1.63 4,432 35.22 0.9595
2026-01-26 2025-12-31 13F IRON MTN INC DEL COM 46284V101 39,506 818 2.11 3,277 -17.70 0.7517
2025-11-04 2025-09-30 13F IRON MTN INC DEL COM 46284V101 38,688 222 0.58 3,983 5.40 0.9167
2025-07-21 2025-06-30 13F IRON MTN INC DEL COM 46284V101 38,466 -176 -0.46 3,779 0.43 0.9181
2025-05-14 2025-03-31 13F IRON MTN INC DEL COM 46284V101 38,642 -5,827 -13.10 3,763 -19.51 0.9521
2025-02-03 2024-12-31 13F IRON MTN INC DEL COM 46284V101 44,469 2,039 4.81 4,674 -9.10 1.2043
2024-10-31 2024-09-30 13F IRON MTN INC DEL COM 46284V101 42,430 -12,440 -22.67 5,143 4.58 1.3213
2024-08-14 2024-06-30 13F IRON MTN INC DEL COM 46284V101 54,870 333 0.61 4,917 12.41 1.3985
2024-04-24 2024-03-31 13F IRON MTN INC DEL COM 46284V101 54,537 -5,867 -9.71 4,374 3.48 1.2813
2024-02-14 2023-12-31 13F IRON MTN INC DEL COM 46284V101 60,404 332 0.55 4,227 18.37 1.3319
2023-10-11 2023-09-30 13F IRON MTN INC DEL COM 46284V101 60,072 60,072 3,571 1.2336
2019-08-13 2019-06-30 13F IRON MTN INC COM 46284V101 0 -16,237 -100.00 0 -100.00
2019-04-23 2019-03-31 13F IRON MTN INC COM 46284V101 16,237 110 0.68 576 10.13 0.3785
2019-03-28 2018-12-31 13F IRON MTN INC COM 46284V101 16,127 16,127 523 0.5062
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.