Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
111,85 € ↑2,30 (2,10%)
2026-06-05
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionPanagora Asset Management Inc
Latest Disclosed Ownership3,524 shares
Latest Disclosed Value $ 359,941
Panagora Asset Management Inc ownership in I5M / Iron Mountain Incorporated

On May 14, 2026 - Panagora Asset Management Inc filed a 13F-HR form disclosing ownership of 3,524 shares of Iron Mountain Incorporated (DE:I5M) valued at $312,861 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,524 shares of Iron Mountain Incorporated. This represents a change in shares of 0.00% during the quarter. The current value of the position is $394,159 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)
2026-05-14 2026-03-31 13F IRON MTN INC DEL COM 46284V101 3,524 0 0.00 360 22.95 0.0013
2026-02-13 2025-12-31 13F IRON MTN INC DEL COM 46284V101 3,524 0 0.00 292 -18.66 0.0010
2025-11-13 2025-09-30 13F IRON MTN INC DEL COM 46284V101 3,524 0 0.00 359 -0.55 0.0014
2025-08-13 2025-06-30 13F IRON MTN INC DEL COM 46284V101 3,524 -1,765 -33.37 361 -20.66 0.0016
2025-05-15 2025-03-31 13F IRON MTN INC DEL COM 46284V101 5,289 0 0.00 455 -18.02 0.0023
2025-02-13 2024-12-31 13F IRON MTN INC DEL COM 46284V101 5,289 1,696 47.20 556 30.28 0.0026
2024-11-13 2024-09-30 13F IRON MTN INC DEL COM 46284V101 3,593 -6 -0.17 427 32.30 0.0020
2024-07-29 2024-06-30 13F IRON MTN INC DEL COM 46284V101 3,599 -11 -0.30 323 11.42 0.0016
2024-05-07 2024-03-31 13F IRON MTN INC DEL COM 46284V101 3,610 0 0.00 290 14.68 0.0015
2024-02-08 2023-12-31 13F IRON MTN INC DEL COM 46284V101 3,610 -87 -2.35 253 15.07 0.0014
2023-10-31 2023-09-30 13F IRON MTN INC DEL COM 46284V101 3,697 4 0.11 220 4.78 0.0014
2023-08-11 2023-06-30 13F IRON MTN INC DEL COM 46284V101 3,693 3,693 210 0.0012
2023-05-11 2023-03-31 13F IRON MTN INC DEL COM 46284V101 0 -10,650 -100.00 0 -100.00
2023-02-13 2022-12-31 13F IRON MTN INC DEL COM 46284V101 10,650 -4,737 -30.79 531 -21.71 0.0035
2022-11-14 2022-09-30 13F IRON MTN INC DEL COM 46284V101 15,387 -3,127 -16.89 677 -24.86 0.0047
2022-08-15 2022-06-30 13F IRON MTN INC COM 46284V101 18,514 -35 -0.19 901 -12.35 0.0059
2022-05-12 2022-03-31 13F IRON MTN INC COM 46284V101 18,549 7,719 71.27 1,028 81.31 0.0056
2022-02-10 2021-12-31 13F IRON MTN INC COM 46284V101 10,830 -9,254 -46.08 567 -35.05 0.0030
2021-11-10 2021-09-30 13F IRON MTN INC COM 46284V101 20,084 0 0.00 873 2.71 0.0047
2021-08-11 2021-06-30 13F IRON MTN INC COM 46284V101 20,084 -46,409 -69.80 850 -65.46 0.0046
2021-05-12 2021-03-31 13F IRON MOUNTAIN REIT 46284V101 66,493 51,773 351.72 2,461 467.05 0.0138
2021-02-10 2020-12-31 13F IRON MOUNTAIN REIT 46284V101 14,720 -1,968 -11.79 434 -2.91 0.0026
2020-11-13 2020-09-30 13F IRON MOUNTAIN REIT 46284V101 16,688 6,942 71.23 447 75.98 0.0028
2020-08-12 2020-06-30 13F IRON MOUNTAIN REIT 46284V101 9,746 -2,516 -20.52 254 -13.01 0.0016
2020-05-14 2020-03-31 13F IRON MOUNTAIN REIT 46284V101 12,262 789 6.88 292 -20.22 0.0021
2020-02-12 2019-12-31 13F IRON MOUNTAIN REIT 46284V101 11,473 1,780 18.36 366 16.56 0.0017
2019-11-12 2019-09-30 13F IRON MOUNTAIN REIT 46284V101 9,693 -1,579 -14.01 314 -11.05 0.0014
2019-08-09 2019-06-30 13F IRON MOUNTAIN REIT 46284V101 11,272 1,913 20.44 353 6.33 0.0016
2019-05-15 2019-03-31 13F IRON MOUNTAIN REIT 46284V101 9,359 -6,982 -42.73 332 -37.36 0.0015
2019-02-14 2018-12-31 13F IRON MOUNTAIN REIT 46284V101 16,341 1,530 10.33 530 3.72 0.0025
2018-11-13 2018-09-30 13F IRON MOUNTAIN REIT 46284V101 14,811 -57 -0.38 511 -1.92 0.0019
2018-08-14 2018-06-30 13F IRON MOUNTAIN REIT 46284V101 14,868 5,104 52.27 521 62.31 0.0021
2018-05-15 2018-03-31 13F IRON MOUNTAIN REIT 46284V101 9,764 -2,823 -22.43 321 -32.42 0.0013
2018-02-14 2017-12-31 13F IRON MOUNTAIN REIT 46284V101 12,587 2,699 27.30 475 23.38 0.0018
2017-11-14 2017-09-30 13F IRON MOUNTAIN REIT 46284V101 9,888 100 1.02 385 14.58 0.0015
2017-08-14 2017-06-30 13F IRON MOUNTAIN REIT 46284V101 9,788 -76,657 -88.68 336 -89.10 0.0014
2017-05-15 2017-03-31 13F IRON MOUNTAIN REIT 46284V101 86,445 -126,994 -59.50 3,083 -55.53 0.0128
2017-02-14 2016-12-31 13F IRON MOUNTAIN REIT 46284V101 213,439 15,817 8.00 6,932 -6.54 0.0318
2016-11-14 2016-09-30 13F IRON MOUNTAIN REIT 46284V101 197,622 171,184 647.49 7,417 604.37 0.0354
2016-08-15 2016-06-30 13F IRON MOUNTAIN REIT 46284V101 26,438 14,994 131.02 1,053 171.39 0.0052
2016-05-16 2016-03-31 13F IRON MOUNTAIN REIT 46284V101 11,444 -2,830 -19.83 388 0.52 0.0019
2016-02-12 2015-12-31 13F IRON MOUNTAIN REIT 46284V101 14,274 -24,562 -63.25 386 -67.97 0.0019
2015-11-13 2015-09-30 13F IRON MOUNTAIN REIT 46284V101 38,836 25,124 183.23 1,205 183.53 0.0064
2015-08-14 2015-06-30 13F IRON MOUNTAIN REIT 46284V101 13,712 -1,403 -9.28 425 -22.87 0.0021
2015-05-15 2015-03-31 13F IRON MOUNTAIN REIT 46284V101 15,115 -7,081 -31.90 551 -35.78 0.0028
2015-02-13 2014-12-31 13F IRON MOUNTAIN REIT 46284V101 22,196 7,914 55.41 858 84.12 0.0044
2014-11-12 2014-09-30 13F IRON MOUNTAIN REIT 462846106 14,282 -512,599 -97.29 466 -97.51 0.0023
2014-08-14 2014-06-30 13F IRON MOUNTAIN COMMON 462846106 526,881 -60,142 -10.25 18,678 15.41 0.0907
2014-05-15 2014-03-31 13F IRON MOUNTAIN COMMON 462846106 587,023 -31,839 -5.14 16,184 -13.83 0.0764
2014-02-21 2013-12-31 13F IRON MOUNTAIN COMMON 462846106 618,862 -161,880 -20.73 18,782 -10.97 0.0870
2013-11-14 2013-09-30 13F IRON MOUNTAIN COMMON 462846106 780,742 -538,881 -40.84 21,096 -39.92 0.1036
2013-08-14 2013-06-30 13F IRON MOUNTAIN COMMON 462846106 1,319,623 1,319,623 35,115 0.1796
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.