Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
111,85 € ↑2,30 (2,10%)
2026-06-05
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership55,694 shares
Latest Disclosed Value $ 5,688,633
First Trust Advisors Lp reports 3.75% increase in ownership of I5M / Iron Mountain Incorporated

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 55,694 shares of Iron Mountain Incorporated (DE:I5M) valued at $4,944,513 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 53,683 shares of Iron Mountain Incorporated. This represents a change in shares of 3.75% during the quarter. The current value of the position is $6,229,374 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)
2026-05-13 2026-03-31 13F IRON MTN INC DEL COM 46284V101 55,694 2,011 3.75 5,689 27.73 0.0041
2026-02-13 2025-12-31 13F IRON MTN INC DEL COM 46284V101 53,683 -96,156 -64.17 4,453 -70.85 0.0032
2025-11-12 2025-09-30 13F IRON MTN INC DEL COM 46284V101 149,839 92,136 159.67 15,275 158.09 0.0114
2025-08-13 2025-06-30 13F IRON MTN INC DEL COM 46284V101 57,703 -94,007 -61.96 5,919 -54.66 0.0048
2025-05-14 2025-03-31 13F IRON MTN INC DEL COM 46284V101 151,710 -67,548 -30.81 13,053 -43.36 0.0116
2025-02-13 2024-12-31 13F IRON MTN INC DEL COM 46284V101 219,258 -31,598 -12.60 23,046 -22.69 0.0203
2024-11-13 2024-09-30 13F IRON MTN INC DEL COM 46284V101 250,856 43,087 20.74 29,809 60.09 0.0284
2024-08-13 2024-06-30 13F IRON MTN INC DEL COM 46284V101 207,769 -27,124 -11.55 18,620 -1.17 0.0190
2024-05-13 2024-03-31 13F IRON MTN INC DEL COM 46284V101 234,893 -14,095 -5.66 18,841 8.13 0.0191
2024-02-13 2023-12-31 13F IRON MTN INC DEL COM 46284V101 248,988 26,378 11.85 17,424 31.66 0.0190
2023-11-13 2023-09-30 13F IRON MTN INC DEL COM 46284V101 222,610 -38,092 -14.61 13,234 -10.66 0.0157
2023-08-14 2023-06-30 13F IRON MTN INC DEL COM 46284V101 260,702 -33,201 -11.30 14,813 -4.74 0.0168
2023-05-15 2023-03-31 13F IRON MTN INC DEL COM 46284V101 293,903 63,715 27.68 15,550 35.51 0.0180
2023-02-09 2022-12-31 13F IRON MTN INC DEL COM 46284V101 230,188 47,492 26.00 11,476 42.85 0.0136
2022-11-14 2022-09-30 13F IRON MTN INC DEL COM 46284V101 182,696 -119,022 -39.45 8,033 -45.32 0.0104
2022-08-12 2022-06-30 13F IRON MTN INC COM 46284V101 301,718 123,630 69.42 14,691 48.88 0.0181
2022-05-13 2022-03-31 13F IRON MTN INC COM 46284V101 178,088 -170,679 -48.94 9,868 -45.93 0.0101
2022-02-08 2021-12-31 13F IRON MTN INC COM 46284V101 348,767 57,692 19.82 18,251 44.31 0.0178
2021-11-15 2021-09-30 13F IRON MTN INC COM 46284V101 291,075 165,117 131.09 12,647 137.24 0.0136
2021-10-12 2021-06-30 13F/A-1 IRON MTN INC COM 46284V101 125,958 75,355 148.91 5,331 184.62 0.0058
2021-08-16 2021-06-30 13F IRON MTN INC COM 46284V101 125,958 75,355 5,331 0.0055
2021-05-14 2021-03-31 13F IRON MTN INC COM 46284V101 50,603 -19,484 -27.80 1,873 -9.34 0.0023
2021-02-02 2020-12-31 13F IRON MTN INC COM 46284V101 70,087 -65,698 -48.38 2,066 -43.21 0.0027
2020-11-05 2020-09-30 13F IRON MTN INC COM 46284V101 135,785 57,178 72.74 3,638 77.29 0.0058
2020-07-22 2020-06-30 13F IRON MTN INC COM 46284V101 78,607 -22,245 -22.06 2,052 -14.50 0.0036
2020-05-06 2020-03-31 13F IRON MTN INC COM 46284V101 100,852 -121,170 -54.58 2,400 -66.08 0.0054
2020-02-03 2019-12-31 13F IRON MTN INC COM 46284V101 222,022 54,676 32.67 7,076 30.55 0.0121
2019-11-04 2019-09-30 13F IRON MTN INC COM 46284V101 167,346 465 0.28 5,420 3.77 0.0102
2019-07-30 2019-06-30 13F IRON MTN INC COM 46284V101 166,881 -18,662 -10.06 5,223 -20.61 0.0098
2019-06-19 2019-03-31 13F/A-1 IRON MTN INC COM 46284V101 185,543 117,825 173.99 6,579 199.73 0.0131
2019-05-09 2019-03-31 13F IRON MTN INC COM 46284V101 185,543 117,825 6,579
2019-02-07 2018-12-31 13F IRON MTN INC COM 46284V101 67,718 -49,721 -42.34 2,195 -45.86 0.0052
2018-10-25 2018-09-30 13F IRON MTN INC COM 46284V101 117,439 -439 -0.37 4,054 -1.77 0.0075
2018-08-02 2018-06-30 13F IRON MTN INC COM 46284V101 117,878 -166,695 -58.58 4,127 -55.87 0.0086
2018-04-23 2018-03-31 13F IRON MTN INC COM 46284V101 284,573 -133,096 -31.87 9,351 -40.66 0.0215
2018-02-08 2017-12-31 13F IRON MTN INC COM 46284V101 417,669 280,782 205.12 15,759 195.94 0.0375
2017-10-24 2017-09-30 13F IRON MTN INC COM 46284V101 136,887 21,779 18.92 5,325 34.64 0.0137
2017-08-02 2017-06-30 13F IRON MTN INC COM 46284V101 115,108 44,534 63.10 3,955 57.13 0.0106
2017-05-02 2017-03-31 13F IRON MTN INC COM 46284V101 70,574 -47,432 -40.19 2,517 -34.33 0.0070
2017-02-06 2016-12-31 13F IRON MTN INC COM 46284V101 118,006 -174,752 -59.69 3,833 -65.11 0.0114
2016-11-01 2016-09-30 13F IRON MTN INC COM 46284V101 292,758 114,784 64.49 10,987 54.99 0.0328
2016-08-04 2016-06-30 13F IRON MTN INC COM 46284V101 177,974 116,893 191.37 7,089 242.30 0.0223
2016-05-10 2016-03-31 13F IRON MTN INC COM 46284V101 61,081 -103,401 -62.86 2,071 -53.39 0.0067
2016-05-04 2015-12-31 13F/A-1 IRON MTN INC COM 46284V101 164,482 53,506 48.21 4,443 29.08 0.0115
2016-02-03 2015-12-31 13F IRON MTN INC COM 46284V101 164,482 4,443
2015-11-05 2015-09-30 13F IRON MTN INC COM 46284V101 110,976 -143,494 -56.39 3,442 -56.37 0.0100
2015-08-04 2015-06-30 13F IRON MTN INC COM 46284V101 254,470 -145,775 -36.42 7,889 -45.97 0.0205
2015-05-04 2015-03-31 13F IRON MTN INC COM 46284V101 400,245 159,386 66.17 14,601 56.80 0.0429
2015-02-13 2014-12-31 13F IRON MTN COM 462846106 240,859 -367,063 -60.38 9,312 -53.09 0.0314
2014-11-12 2014-09-30 13F IRON MTN COM 462846106 607,922 607,922 2,922.68 19,849 3,610.09 0.0781
2013-11-12 2013-09-30 13F IRON MTN COM 462846106 0 -20,112 -100.00 0 -100.00
2013-08-12 2013-06-30 13F IRON MTN COM 462846106 20,112 20,112 535 0.0035
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.