Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
108,60 € ↓ -0,40 (-0,37%)
2026-05-29
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionFifth Third Bancorp
Latest Disclosed Ownership22,940 shares
Latest Disclosed Value $ 2,343,092
Fifth Third Bancorp reports 0.66% increase in ownership of I5M / Iron Mountain Incorporated

On May 1, 2026 - Fifth Third Bancorp filed a 13F-HR form disclosing ownership of 22,940 shares of Iron Mountain Incorporated (DE:I5M) valued at $2,036,613 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 22,790 shares of Iron Mountain Incorporated. This represents a change in shares of 0.66% during the quarter. The current value of the position is $2,491,284 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)
2026-05-01 2026-03-31 13F IRON MTN INC DEL COM 46284V101 22,940 150 0.66 2,343 23.97 0.0043
2026-02-02 2025-12-31 13F IRON MTN INC DEL COM 46284V101 22,790 628 2.83 1,890 -16.33 0.0060
2025-11-07 2025-09-30 13F IRON MTN INC DEL COM 46284V101 22,162 1,072 5.08 2,259 4.44 0.0072
2025-07-15 2025-06-30 13F IRON MTN INC DEL COM 46284V101 21,090 499 2.42 2,163 22.13 0.0075
2025-04-15 2025-03-31 13F IRON MTN INC DEL COM 46284V101 20,591 -219 -1.05 1,772 -19.02 0.0067
2025-01-21 2024-12-31 13F IRON MTN INC DEL COM 46284V101 20,810 -2,900 -12.23 2,187 -22.36 0.0079
2024-10-17 2024-09-30 13F IRON MTN INC DEL COM 46284V101 23,710 -2,526 -9.63 2,817 19.82 0.0102
2024-07-22 2024-06-30 13F IRON MTN INC DEL COM 46284V101 26,236 -68 -0.26 2,351 11.47 0.0090
2024-04-23 2024-03-31 13F IRON MTN INC DEL COM 46284V101 26,304 -555 -2.07 2,110 12.24 0.0083
2024-01-19 2023-12-31 13F IRON MTN INC DEL COM 46284V101 26,859 -16,973 -38.72 1,880 -27.87 0.0080
2023-10-31 2023-09-30 13F IRON MTN INC DEL COM 46284V101 43,832 -36,765 -45.62 2,606 -43.11 0.0121
2023-07-26 2023-06-30 13F IRON MTN INC DEL COM 46284V101 80,597 -1,636 -1.99 4,580 5.26 0.0202
2023-04-24 2023-03-31 13F IRON MTN INC DEL COM 46284V101 82,233 -1,449 -1.73 4,351 4.29 0.0203
2023-01-25 2022-12-31 13F IRON MTN INC DEL COM 46284V101 83,682 -9,674 -10.36 4,172 1.61 0.0200
2022-10-25 2022-09-30 13F IRON MTN INC DEL COM 46284V101 93,356 -1,352 -1.43 4,105 -10.97 0.0215
2022-08-04 2022-06-30 13F IRON MTN INC COM 46284V101 94,708 -1,583 -1.64 4,611 -13.57 0.0223
2022-04-19 2022-03-31 13F IRON MTN INC COM 46284V101 96,291 92,875 2,718.82 5,335 2,880.45 0.0218
2022-02-01 2021-12-31 13F IRON MTN INC COM 46284V101 3,416 338 10.98 179 33.58 0.0007
2021-10-15 2021-09-30 13F IRON MTN INC COM 46284V101 3,078 719 30.48 134 34.00 0.0006
2021-08-06 2021-06-30 13F IRON MTN INC COM 46284V101 2,359 480 25.55 100 42.86 0.0004
2021-05-07 2021-03-31 13F IRON MTN INC COM 46284V101 1,879 -715 -27.56 70 -7.89 0.0003
2021-02-16 2020-12-31 13F IRON MTN INC COM 46284V101 2,594 -126 -4.63 76 4.11 0.0004
2020-11-09 2020-09-30 13F IRON MTN INC COM 46284V101 2,720 -281 -9.36 73 -6.41 0.0004
2020-08-05 2020-06-30 13F IRON MTN INC COM 46284V101 3,001 -1,012 -25.22 78 -18.75 0.0005
2020-05-05 2020-03-31 13F IRON MTN INC COM 46284V101 4,013 121 3.11 96 -22.58 0.0007
2020-02-14 2019-12-31 13F IRON MTN INC COM 46284V101 3,892 575 17.33 124 15.89 0.0007
2019-11-14 2019-09-30 13F IRON MTN INC COM 46284V101 3,317 -1,763 -34.70 107 -32.70 0.0006
2019-08-07 2019-06-30 13F IRON MTN INC COM 46284V101 5,080 4,251 512.79 159 448.28 0.0010
2019-05-14 2019-03-31 13F IRON MTN INC COM 46284V101 829 194 30.55 29 38.10 0.0002
2019-02-14 2018-12-31 13F IRON MTN INC COM 46284V101 635 160 33.68 21 31.25 0.0002
2018-11-14 2018-09-30 13F IRON MTN INC COM 46284V101 475 301 172.99 16 166.67 0.0001
2018-08-14 2018-06-30 13F IRON MTN INC COM 46284V101 174 -833 -82.72 6 -81.82 0.0000
2018-05-15 2018-03-31 13F IRON MTN INC COM 46284V101 1,007 -57,996 -98.29 33 -98.52 0.0002
2018-02-14 2017-12-31 13F IRON MTN INC COM 46284V101 59,003 2,991 5.34 2,226 2.16 0.0151
2017-11-14 2017-09-30 13F IRON MTN INC COM 46284V101 56,012 -22,703 -28.84 2,179 -19.45 0.0156
2017-08-11 2017-06-30 13F IRON MTN INC COM 46284V101 78,715 -2,735 -3.36 2,705 -6.88 0.0199
2017-05-12 2017-03-31 13F IRON MTN INC COM 46284V101 81,450 -1,036 -1.26 2,905 8.44 0.0220
2017-02-13 2016-12-31 13F/A-1 IRON MTN INC COM 46284V101 82,486 -1,612 -1.92 2,679 -15.11 0.0216
2017-02-09 2016-12-31 13F IRON MTN INC COM 46284V101 84,098 0 3,156 0.0261
2016-11-10 2016-09-30 13F IRON MTN INC COM 46284V101 84,098 6,500 8.38 3,156 2.10 0.0261
2016-08-11 2016-06-30 13F IRON MTN INC COM 46284V101 77,598 -4,997 -6.05 3,091 10.35 0.0262
2016-05-13 2016-03-31 13F IRON MTN INC COM 46284V101 82,595 -4,950 -5.65 2,801 18.44 0.0242
2016-02-16 2015-12-31 13F IRON MTN INC COM 46284V101 87,545 7,704 9.65 2,365 -4.52 0.0208
2015-11-13 2015-09-30 13F IRON MTN INC COM 46284V101 79,841 -31,051 -28.00 2,477 -27.95 0.0230
2015-08-14 2015-06-30 13F IRON MTN INC COM 46284V101 110,892 -9,789 -8.11 3,438 -21.90 0.0300
2015-05-14 2015-03-31 13F IRON MTN INC COM 46284V101 120,681 119,977 17,042.19 4,402 16,203.70 0.0381
2015-02-13 2014-12-31 13F IRON MTN COM 462846106 704 88 14.29 27 35.00 0.0002
2014-11-17 2014-09-30 13F IRON MTN COM 462846106 616 11 1.82 20 -4.76 0.0002
2014-08-14 2014-06-30 13F IRON MTN COM 462846106 605 0 0.00 21 23.53 0.0002
2014-05-15 2014-03-31 13F IRON MTN COM 462846106 605 -1,011 -62.56 17 -65.31 0.0002
2014-02-14 2013-12-31 13F IRON MTN COM 462846106 1,616 346 27.24 49 44.12 0.0005
2013-11-14 2013-09-30 13F IRON MTN COM 462846106 1,270 -12 -0.94 34 0.00 0.0004
2013-08-14 2013-06-30 13F IRON MTN COM 462846106 1,282 1,282 34 0.0004
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.