Iron Mountain Incorporated
MX ˙ BMV ˙ US46284V1017
SecurityMX:IRM1 / Iron Mountain Incorporated
InstitutionRoyal Fund Management, LLC
Latest Disclosed Ownership15,649 shares
Latest Disclosed Value $ 1,598,416
Royal Fund Management, LLC reports 66.00% decrease in ownership of IRM1 / Iron Mountain Incorporated

On May 19, 2026 - Royal Fund Management, LLC filed a 13F-HR form disclosing ownership of 15,649 shares of Iron Mountain Incorporated (MX:IRM1) valued at $1,598,416 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 15, 2026 disclosing 46,030 shares of Iron Mountain Incorporated. This represents a change in shares of -66.00% 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)
2026-05-19 2026-03-31 13F IRON MTN INC DEL COM 46284V101 15,649 -30,381 -66.00 1,598 -58.15 0.1517
2026-01-15 2025-12-31 13F IRON MTN INC DEL COM 46284V101 46,030 32,335 236.11 3,818 173.50 0.3473
2025-10-29 2025-09-30 13F IRON MTN INC DEL COM 46284V101 13,695 -865 -5.94 1,396 -6.50 0.1663
2025-08-13 2025-06-30 13F IRON MTN INC DEL COM 46284V101 14,560 1,248 9.38 1,494 30.28 0.1482
2025-05-14 2025-03-31 13F IRON MTN INC DEL COM 46284V101 13,312 135 1.02 1,147 -17.38 0.1276
2025-01-16 2024-12-31 13F IRON MTN INC DEL COM 46284V101 13,177 -12,849 -49.37 1,387 -55.21 0.1294
2024-10-08 2024-09-30 13F IRON MTN INC DEL COM 46284V101 26,026 12,186 88.05 3,097 149.36 0.1846
2024-07-18 2024-06-30 13F IRON MTN INC DEL COM 46284V101 13,840 -1,579 -10.24 1,242 0.40 0.1006
2024-04-11 2024-03-31 13F IRON MTN INC DEL COM 46284V101 15,419 -150 -0.96 1,237 13.59 0.1216
2024-02-06 2023-12-31 13F IRON MTN INC DEL COM 46284V101 15,569 -161 -1.02 1,089 16.47 0.1206
2023-10-17 2023-09-30 13F IRON MTN INC DEL COM 46284V101 15,730 -1,350 -7.90 935 -3.61 0.1266
2023-07-12 2023-06-30 13F IRON MTN INC DEL COM 46284V101 17,080 -913 -5.07 970 1.89 0.1207
2023-04-10 2023-03-31 13F IRON MTN INC DEL COM 46284V101 17,993 1,434 8.66 952 15.39 0.1362
2023-01-20 2022-12-31 13F IRON MTN INC DEL COM 46284V101 16,559 872 5.56 825 19.74 0.1313
2022-11-14 2022-09-30 13F IRON MOUNTAIN INC COM COM 46284V101 15,687 2,642 20.25 689 8.50 0.1252
2022-07-28 2022-06-30 13F IRON MOUNTAIN INC COM COM 46284V101 13,045 4,243 48.20 635 30.39 0.1055
2022-05-13 2022-03-31 13F IRON MOUNTAIN INC COM COM 46284V101 8,802 897 11.35 487 17.92 0.0705
2022-02-11 2021-12-31 13F IRON MOUNTAIN INC COM COM 46284V101 7,905 633 8.70 413 31.11 0.0592
2021-10-20 2021-09-30 13F IRON MOUNTAIN INC COM COM 46284V101 7,272 276 3.95 315 6.42 0.0459
2021-07-26 2021-06-30 13F IRON MOUNTAIN INC COM USD0.01 COM 46284V101 6,996 -208 -2.89 296 11.28 0.0490
2021-04-29 2021-03-31 13F IRON MOUNTAIN INC COM USD0.01 COM 46284V101 7,204 203 2.90 266 29.13 0.0487
2021-02-02 2020-12-31 13F IRON MOUNTAIN INC COM USD0.01 COM 46284V101 7,001 -969 -12.16 206 -3.29 0.0436
2020-10-13 2020-09-30 13F IRON MOUNTAIN INC COM COM 46284V101 7,970 116 1.48 213 3.90 0.0545
2020-08-06 2020-06-30 13F IRON MOUNTAIN INC COM COM 46284V101 7,854 -1,186 -13.12 205 -4.65 0.0723
2020-05-08 2020-03-31 13F IRON MOUNTAIN INC COM COM 46284V101 9,040 1,692 23.03 215 -8.12 0.0876
2020-05-11 2019-12-31 13F IRON MOUNTAIN INC COM COM 46284V101 7,348 1,594 27.70 234 25.81 0.0595
2020-05-08 2019-09-30 13F IRON MOUNTAIN INC COM COM 46284V101 5,754 98 1.73 186 5.08 0.0519
2020-05-08 2019-06-30 13F IRON MOUNTAIN INC COM COM 46284V101 5,656 -1,454 -20.45 177 -29.76 0.0525
2020-05-11 2019-03-31 13F IRON MOUNTAIN INC COM COM 46284V101 7,110 559 8.53 252 18.87 0.0804
2020-05-07 2018-12-31 13F IRON MOUNTAIN INC COM COM 46284V101 6,551 96 1.49 212 -4.50 0.0860
2020-05-07 2018-09-30 13F IRON MOUNTAIN INC COM COM 46284V101 6,455 645 11.10 222 9.36 0.0691
2020-05-07 2018-06-30 13F IRON MOUNTAIN INC COM COM 46284V101 5,810 260 4.68 203 11.54 0.0670
2020-05-07 2018-03-31 13F IRON MOUNTAIN INC COM COM 46284V101 5,550 527 10.49 182 -3.70 0.0665
2020-05-07 2017-12-31 13F IRON MOUNTAIN INC COM COM 46284V101 5,023 356 7.63 189 4.42 0.0678
2020-05-07 2017-09-30 13F IRON MOUNTAIN INC COM COM 46284V101 4,667 315 7.24 181 21.48 0.0721
2020-05-07 2017-06-30 13F IRON MOUNTAIN INC COM COM 46284V101 4,352 1,883 76.27 149 69.32 0.0632
2020-05-07 2017-03-31 13F IRON MOUNTAIN INC COM COM 46284V101 2,469 1,129 84.25 88 104.65 0.0425
2020-05-07 2016-12-31 13F IRON MOUNTAIN INC COM COM 46284V101 1,340 1,340 43 0.0239
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.