Iron Mountain Incorporated
MX ˙ BMV ˙ US46284V1017
SecurityMX:IRM1 / Iron Mountain Incorporated
InstitutionGlobal Retirement Partners, LLC
Latest Disclosed Ownership13,109 shares
Latest Disclosed Value $ 1,087,429
Global Retirement Partners, LLC reports 86.31% increase in ownership of IRM1 / Iron Mountain Incorporated

On February 6, 2026 - Global Retirement Partners, LLC filed a 13F-HR form disclosing ownership of 13,109 shares of Iron Mountain Incorporated (MX:IRM1) valued at $1,087,429 USD as of December 31, 2025. The entity filed a previous 13F-HR on October 21, 2025 disclosing 7,036 shares of Iron Mountain Incorporated. This represents a change in shares of 86.31% 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)
2026-02-06 2025-12-31 13F IRON MTN INC DEL COM 46284V101 13,109 6,073 86.31 1,087 51.60 0.0192
2025-10-21 2025-09-30 13F IRON MTN INC DEL COM 46284V101 7,036 450 6.83 717 6.22 0.0161
2025-08-12 2025-06-30 13F IRON MTN INC DEL COM 46284V101 6,586 -759 -10.33 676 -12.56 0.0167
2025-01-31 2024-12-31 13F IRON MTN INC DEL COM 46284V101 7,345 -1,507 -17.02 772 -26.55 0.0221
2024-10-16 2024-09-30 13F IRON MTN INC DEL COM 46284V101 8,852 -317 -3.46 1,052 28.01 0.0318
2024-07-23 2024-06-30 13F IRON MTN INC DEL COM 46284V101 9,169 822 9.85 822 22.72 0.0257
2024-04-23 2024-03-31 13F IRON MTN INC DEL COM 46284V101 8,347 -869 -9.43 670 9.49 0.0250
2024-01-18 2023-12-31 13F IRON MTN INC DEL COM 46284V101 9,216 156 1.72 612 17.05 0.0256
2023-10-13 2023-09-30 13F IRON MTN INC DEL COM 46284V101 9,060 -48 -0.53 523 0.97 0.0263
2023-07-20 2023-06-30 13F IRON MTN INC DEL COM 46284V101 9,108 1,236 15.70 518 19.12 0.0253
2023-05-08 2023-03-31 13F IRON MTN INC DEL COM 46284V101 7,872 1,306 19.89 434 32.72 0.0231
2023-02-13 2022-12-31 13F IRON MTN INC DEL COM 46284V101 6,566 976 17.46 327 16.79 0.0225
2022-11-03 2022-09-30 13F IRON MTN INC DEL COM 46284V101 5,590 -1,191 -17.56 280 -15.15 0.0212
2022-07-15 2022-06-30 13F IRON MTN INC COM 46284V101 6,781 -111 -1.61 330 -6.52 0.0265
2022-07-14 2022-03-31 13F IRON MTN INC COM 46284V101 6,892 6,892 353 0.0277
2022-01-21 2021-12-31 13F IRON MTN INC COM 46284V101 0 -6,579 -100.00 0 -100.00
2021-10-22 2021-09-30 13F IRON MTN INC COM 46284V101 6,579 230 3.62 286 6.32 0.0283
2021-07-15 2021-06-30 13F IRON MTN INC COM 46284V101 6,349 3 0.05 269 14.47 0.0276
2021-04-14 2021-03-31 13F IRON MTN INC COM 46284V101 6,346 1,200 23.32 235 54.61 0.0275
2021-01-13 2020-12-31 13F IRON MTN INC COM 46284V101 5,146 2 0.04 152 10.14 0.0190
2020-10-09 2020-09-30 13F IRON MTN INC COM 46284V101 5,144 360 7.53 138 10.40 0.0202
2020-07-13 2020-06-30 13F IRON MTN INC COM 46284V101 4,784 3 0.06 125 9.65 0.0199
2020-04-28 2020-03-31 13F IRON MTN INC COM 46284V101 4,781 -32 -0.66 114 -25.49 0.0216
2020-01-23 2019-12-31 13F IRON MTN INC COM 46284V101 4,813 215 4.68 153 2.68 0.0234
2019-11-19 2019-09-30 13F IRON MTN INC COM 46284V101 4,598 265 6.12 149 9.56 0.0245
2019-11-19 2019-06-30 13F IRON MTN INC COM 46284V101 4,333 256 6.28 136 -6.21 0.0260
2019-05-07 2019-03-31 13F IRON MTN INC COM 46284V101 4,077 860 26.73 145 39.42 0.0351
2019-02-22 2018-12-31 13F IRON MTN INC COM 46284V101 3,217 55 1.74 104 -4.59 0.0266
2018-10-17 2018-09-30 13F IRON MTN INC COM 46284V101 3,162 52 1.67 109 0.00 0.0246
2018-08-13 2018-06-30 13F IRON MTN INC COM 46284V101 3,110 56 1.83 109 9.00 0.0276
2018-08-10 2018-03-31 13F IRON MTN INC COM 46284V101 3,054 46 1.53 100 -11.50 0.0276
2018-08-13 2017-12-31 13F IRON MTN INC COM 46284V101 3,008 42 1.42 113 -1.74 0.0311
2018-08-10 2017-09-30 13F IRON MTN INC COM 46284V101 2,966 46 1.58 115 15.00 0.0475
2018-08-10 2017-06-30 13F IRON MTN INC COM 46284V101 2,920 45 1.57 100 -2.91 0.0470
2018-08-10 2017-03-31 13F IRON MTN INC COM 46284V101 2,875 0 0.00 103 10.75 0.0576
2018-08-10 2016-12-31 13F IRON MTN INC COM 46284V101 2,875 2,875 93 0.0625
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.