Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
111,85 € ↑2,30 (2,10%)
2026-06-05
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionVictory Capital Management Inc
Latest Disclosed Ownership238,190 shares
Latest Disclosed Value $ 24,328,727
Victory Capital Management Inc reports 19.67% increase in ownership of I5M / Iron Mountain Incorporated

On May 15, 2026 - Victory Capital Management Inc filed a 13F-HR form disclosing ownership of 238,190 shares of Iron Mountain Incorporated (DE:I5M) valued at $21,146,508 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 199,036 shares of Iron Mountain Incorporated. This represents a change in shares of 19.67% during the quarter. The current value of the position is $26,641,552 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 238,190 39,154 19.67 24,329 47.35 0.0117
2026-02-13 2025-12-31 13F IRON MTN INC DEL COM 46284V101 199,036 -23,898 -10.72 16,510 -27.35 0.0093
2025-11-12 2025-09-30 13F IRON MTN INC DEL REIT 46284V101 222,934 -9,020 -3.89 22,726 -4.48 0.0133
2025-08-13 2025-06-30 13F IRON MTN INC DEL COM 46284V101 231,954 146,108 170.20 23,792 222.11 0.0153
2025-05-02 2025-03-31 13F IRON MTN INC DEL COM 46284V101 85,846 -11,257 -11.59 7,386 -27.63 0.0076
2025-02-06 2024-12-31 13F IRON MTN INC DEL COM 46284V101 97,103 -6,807 -6.55 10,206 -17.34 0.0100
2024-11-05 2024-09-30 13F IRON MTN INC DEL COM 46284V101 103,910 -3,558 -3.31 12,348 28.20 0.0119
2024-08-05 2024-06-30 13F IRON MTN INC DEL COM 46284V101 107,468 -1,441 -1.32 9,631 10.26 0.0097
2024-05-03 2024-03-31 13F IRON MTN INC DEL COM 46284V101 108,909 -6,609 -5.72 8,736 8.07 0.0085
2024-02-05 2023-12-31 13F IRON MTN INC DEL COM 46284V101 115,518 -7,078 -5.77 8,084 10.91 0.0085
2023-11-06 2023-09-30 13F IRON MTN INC DEL COM 46284V101 122,596 21,313 21.04 7,288 26.66 0.0084
2023-07-27 2023-06-30 13F IRON MTN INC DEL COM 46284V101 101,283 -514 -0.50 5,755 6.83 0.0063
2023-05-02 2023-03-31 13F IRON MTN INC DEL COM 46284V101 101,797 -4,834 -4.53 5,386 1.34 0.0060
2023-04-25 2022-12-31 13F/A-3 IRON MTN INC DEL COM 46284V101 106,631 -35,481 -24.97 5,316 -14.95 0.0061
2023-03-10 2022-12-31 13F/A-2 IRON MTN INC DEL COM 46284V101 106,631 -35,481 5,316 0.0037
2023-02-10 2022-12-31 13F/A-1 IRON MTN INC DEL COM 46284V101 106,631 -35,481 5,316 0.0000
2023-02-09 2022-12-31 13F IRON MTN INC DEL COM 46284V101 107,833 -34,279 5,886 0.0040
2022-11-02 2022-09-30 13F IRON MTN INC DEL COM 46284V101 142,112 5,184 3.79 6,249 -6.27 0.0073
2022-08-01 2022-06-30 13F IRON MTN INC COM 46284V101 136,928 -3,618 -2.57 6,667 -11.72 0.0076
2022-05-04 2022-03-31 13F IRON MTN INC COM 46284V101 140,546 73,115 108.43 7,552 114.00 0.0076
2022-02-07 2021-12-31 13F IRON MTN INC COM 46284V101 67,431 -4,324 -6.03 3,529 13.18 0.0032
2021-11-02 2021-09-30 13F IRON MTN INC COM 46284V101 71,755 -22,357 -23.76 3,118 -21.72 0.0031
2021-08-03 2021-06-30 13F IRON MTN INC COM 46284V101 94,112 -40,071 -29.86 3,983 -19.79 0.0038
2021-05-04 2021-03-31 13F IRON MTN INC COM 46284V101 134,183 471 0.35 4,966 25.98 0.0051
2021-02-01 2020-12-31 13F IRON MTN INC COM 46284V101 133,712 64,208 92.38 3,942 111.71 0.0044
2020-11-09 2020-09-30 13F Iron Mountain COM 46284V101 69,504 53,028 321.85 1,862 333.02 0.0024
2020-08-07 2020-06-30 13F IRON MTN INC REIT 46284V101 16,476 -1,262 -7.11 430 1.90 0.0006
2020-05-12 2020-03-31 13F/A-1 IRON MTN INC REIT 46284V101 17,738 -443 -2.44 422 -27.12 0.0007
2020-05-04 2020-03-31 13F IRON MTN INC REIT 46284V101 17,738 -443 422 461.8361
2020-02-06 2019-12-31 13F/A-1 IRON MTN INC COM 46284V101 18,181 14,588 406.01 579 399.14 0.0007
2020-02-04 2019-12-31 13F IRON MTN INC COM 46284V101 18,002 14,409 569 682.0550
2019-11-12 2019-09-30 13F IRON MTN INC COM 46284V101 3,593 -515 -12.54 116 -10.08 0.0001
2019-08-15 2019-06-30 13F IRON MTN INC COM 46284V101 4,108 -87 -2.07 129 -13.42 0.0003
2019-05-03 2019-03-31 13F IRON MTN INC CS 46284V101 4,195 -25 -0.59 149 8.76 0.0003
2019-05-02 2018-12-31 13F/A-1 IRON MTN INC COM 46284V101 4,220 -28 -0.66 137 -6.80 0.0003
2019-02-05 2018-12-31 13F IRON MTN INC COM 46284V101 4,220 -28 137
2018-11-01 2018-09-30 13F IRON MTN INC COM 46284V101 4,248 -9 -0.21 147 -1.34 0.0003
2018-08-02 2018-06-30 13F IRON MTN INC COM 46284V101 4,257 -88 -2.03 149 4.20 0.0003
2018-05-04 2018-03-31 13F IRON MTN INC COM 46284V101 4,345 -906,864 -99.52 143 -99.58 0.0003
2018-02-01 2017-12-31 13F IRON MTN INC REIT 46284V101 911,209 -61,616 -6.33 34,380 -9.15 0.0724
2017-10-27 2017-09-30 13F IRON MTN INC COM 46284V101 972,825 -316,650 -24.56 37,843 -14.59 0.0850
2017-08-07 2017-06-30 13F IRON MTN INC COM 46284V101 1,289,475 -19,443 -1.49 44,306 -5.10 0.1037
2017-05-10 2017-03-31 13F IRON MTN INC REIT 46284V101 1,308,918 929,555 245.03 46,689 278.91 0.1111
2017-02-09 2016-12-31 13F IRON MTN INC NEW COM REIT 46284V101 379,363 88,414 30.39 12,322 12.85 0.0311
2016-11-02 2016-09-30 13F IRON MTN INC COM 46284V101 290,949 287,899 9,439.31 10,919 8,923.97 0.0306
2016-08-09 2016-06-30 13F IRON MTN INC COM 46284V101 3,050 528 20.94 121 40.70 0.0005
2016-05-17 2016-03-31 13F/A-2 IRON MTN INC COM 46284V101 2,522 -108 -4.11 86 21.13 0.0004
2016-05-12 2016-03-31 13F/A-1 IRON MTN INC COM 46284V101 2,522 0 86 0.0004
2016-05-12 2016-03-31 13F IRON MTN INC COM 46284V101 2,522 86
2016-02-10 2015-12-31 13F IRON MTN INC COM 46284V101 2,630 2,630 0.00 71 0.0003
2015-11-06 2015-09-30 13F IRON MTN INC REIT 46284V101 0 -105,411 -100.00 0 -100.00
2015-08-14 2015-06-30 13F/A-01 IRON MTN INC REIT 46284V101 105,411 -2,333,242 -95.68 3,267 -96.33 0.0121
2015-08-07 2015-06-30 13F IRON MTN INC REIT 46284V101 105,411 3,267
2015-05-07 2015-03-31 13F IRON MTN INC REITS 46284V101 2,438,653 674 0.03 88,962 -5.61 0.3195
2015-02-11 2014-12-31 13F Iron Mountain COM 46284V101 2,437,979 2,437,979 94,252 0.3474
2015-02-11 2014-12-31 13F IRON MTN INC COM COM 462846106 49,305 49,305 1,906 0.0070
2014-02-12 2013-12-31 13F Iron Mountain Common Stock 462846106 0 -182 -100.00 0 -100.00
2014-03-12 2013-09-30 13F/A-1 Iron Mountain Common Stock 462846106 182 182 4 0.0000
2013-11-12 2013-09-30 13F Iron Mountain Common Stock 462846106 182 4
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.