Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
108,60 € ↓ -0,40 (-0,37%)
2026-05-29
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionState Street Corp
Latest Disclosed Ownership16,568,963 shares
Ownership 5.70%
State Street Corp ownership in I5M / Iron Mountain Incorporated

2024-10-17 - State Street Corp has filed an SC 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 16,568,963 shares of Iron Mountain Incorporated (DE:I5M). This represents 5.7 percent ownership of the company.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2024-10-17 2024-10-17 13G 16,568,963 5.70

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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 17,551,633 662,835 3.92 1,807,660 27.75 0.0624
2026-02-13 2025-12-31 13F IRON MTN INC DEL COM 46284V101 16,888,798 -242,989 -1.42 1,415,002 -19.58 0.0475
2025-11-14 2025-09-30 13F IRON MTN INC DEL COM 46284V101 17,131,787 322,144 1.92 1,759,494 1.29 0.0610
2025-08-14 2025-06-30 13F IRON MTN INC DEL COM 46284V101 16,809,643 104,524 0.63 1,737,002 19.77 0.0651
2025-05-15 2025-03-31 13F IRON MTN INC DEL COM 46284V101 16,705,119 83,336 0.50 1,450,255 -17.54 0.0598
2025-02-14 2024-12-31 13F IRON MTN INC DEL COM 46284V101 16,621,783 54,006 0.33 1,758,650 -11.20 0.0694
2024-11-14 2024-09-30 13F IRON MTN INC DEL COM 46284V101 16,567,777 -948,401 -5.41 1,980,411 25.46 0.0806
2024-08-14 2024-06-30 13F IRON MTN INC DEL COM 46284V101 17,516,178 3,704,370 26.82 1,578,536 41.36 0.0690
2024-05-15 2024-03-31 13F IRON MTN INC DEL COM 46284V101 13,811,808 18,872 0.14 1,116,640 14.65 0.0499
2024-02-14 2023-12-31 13F IRON MTN INC DEL COM 46284V101 13,792,936 599,533 4.54 973,916 22.84 0.0474
2023-11-14 2023-09-30 13F IRON MTN INC DEL COM 46284V101 13,193,403 -721,701 -5.19 792,820 -0.78 0.0440
2023-08-14 2023-06-30 13F IRON MTN INC DEL COM 46284V101 13,915,104 117,817 0.85 799,058 8.22 0.0420
2023-05-15 2023-03-31 13F IRON MTN INC DEL COM 46284V101 13,797,287 -451,341 -3.17 738,340 2.68 0.0417
2023-05-15 2022-12-31 13F/A-99 IRON MTN INC DEL COM 46284V101 14,248,628 -251,936 -1.74 719,096 11.23 0.0423
2023-05-15 2022-12-31 13F IRON MTN INC DEL COM 46284V101 14,248,628 -251,936 719,096 0.0423
2022-11-15 2022-09-30 13F IRON MTN INC DEL COM 46284V101 14,500,564 -395,540 -2.66 646,473 -11.96 0.0409
2022-08-15 2022-06-30 13F IRON MTN INC COM 46284V101 14,896,104 274,095 1.87 734,333 -10.34 0.0440
2022-05-16 2022-03-31 13F IRON MTN INC COM 46284V101 14,622,009 261,765 1.82 819,026 7.74 0.0405
2022-02-14 2021-12-31 13F IRON MTN INC COM 46284V101 14,360,244 522,760 3.78 760,179 24.69 0.0361
2021-11-15 2021-09-30 13F IRON MTN INC COM 46284V101 13,837,484 380,178 2.83 609,648 5.54 0.0322
2021-08-16 2021-06-30 13F IRON MTN INC COM 46284V101 13,457,306 841,781 6.67 577,633 21.71 0.0304
2021-07-09 2021-03-31 13F/A-1 IRON MTN INC COM 46284V101 12,615,525 -124,595 -0.98 474,585 23.78 0.0272
2021-05-17 2021-03-31 13F IRON MTN INC COM 46284V101 12,615,525 -124,595 474,585 0.0272
2021-02-16 2020-12-31 13F IRON MTN INC COM 46284V101 12,740,120 -451,921 -3.43 383,420 6.07 0.0235
2020-11-10 2020-09-30 13F IRON MTN INC COM 46284V101 13,192,041 -1,073,145 -7.52 361,491 -5.13 0.0247
2020-08-14 2020-06-30 13F IRON MTN INC COM 46284V101 14,265,186 384,307 2.77 381,019 12.50 0.0277
2020-06-19 2020-03-31 13F/A-1 IRON MTN INC COM 46284V101 13,880,879 314,582 2.32 338,677 -23.11 0.0296
2020-05-11 2020-03-31 13F IRON MTN INC COM 46284V101 13,880,879 314,582 338,677 29,742.6599
2020-02-06 2019-12-31 13F IRON MTN INC COM 46284V101 13,566,297 580,058 4.47 440,456 2.80 0.0302
2019-11-14 2019-09-30 13F IRON MTN INC COM 46284V101 12,986,239 637,543 5.16 428,457 8.78 0.0319
2019-08-14 2019-06-30 13F IRON MTN INC COM 46284V101 12,348,696 348,155 2.90 393,867 -9.00 0.0294
2019-05-15 2019-03-31 13F IRON MTN INC COM 46284V101 12,000,541 525,078 4.58 432,819 14.24 0.0338
2019-02-12 2018-12-31 13F IRON MTN INC COM 46284V101 11,475,463 164,654 1.46 378,858 -2.97 0.0345
2018-11-09 2018-09-30 13F IRON MOUNTAIN Common equity shares 46284V101 11,310,809 546,062 5.07 390,449 3.60 0.0300
2018-08-14 2018-06-30 13F IRON MOUNTAIN Common equity shares 46284V101 10,764,747 -133,614 -1.23 376,880 5.24 0.0315
2018-05-15 2018-03-31 13F IRON MOUNTAIN Common equity shares 46284V101 10,898,361 80,498 0.74 358,119 -12.26 0.0304
2018-02-14 2017-12-31 13F IRON MOUNTAIN Common equity shares 46284V101 10,817,863 430,308 4.14 408,150 1.01 0.0328
2017-11-14 2017-09-30 13F IRON MOUNTAIN Common equity shares 46284V101 10,387,555 98,089 0.95 404,077 14.29 0.0349
2017-08-14 2017-06-30 13F IRON MOUNTAIN Common equity shares 46284V101 10,289,466 -285,599 -2.70 353,555 -6.27 0.0313
2017-05-15 2017-03-31 13F IRON MOUNTAIN Common equity shares 46284V101 10,575,065 320,851 3.13 377,212 13.26 0.0337
2017-02-09 2016-12-31 13F IRON MOUNTAIN Common equity shares 46284V101 10,254,214 -232,849 -2.22 333,052 -15.38 0.0313
2017-01-13 2016-09-30 13F/A-1 IRON MOUNTAIN Common equity shares 46284V101 10,487,063 375,956 3.72 393,581 -2.27 0.0397
2016-11-14 2016-09-30 13F IRON MOUNTAIN Common equity shares 46284V101 7,942,388 298,079
2016-08-12 2016-06-30 13F IRON MOUNTAIN Common equity shares 46284V101 10,111,107 1,786,266 21.46 402,723 42.66 0.0433
2016-05-20 2016-03-31 13F/A-1 IRON MOUNTAIN Common equity shares 46284V101 8,324,841 -37,658 -0.45 282,286 24.98 0.0305
2016-05-12 2016-03-31 13F IRON MOUNTAIN Common equity shares 46284V101 8,324,841 282,286
2016-02-16 2015-12-31 13F IRON MOUNTAIN Common equity shares 46284V101 8,362,499 192,920 2.36 225,872 -10.87 0.0247
2015-11-16 2015-09-30 13F IRON MOUNTAIN Common equity shares 46284V101 8,169,579 474,784 6.17 253,418 6.24 0.0295
2015-08-13 2015-06-30 13F IRON MOUNTAIN Common equity shares 46284V101 7,694,795 -147,799 -1.88 238,531 -16.63 0.0255
2015-05-15 2015-03-31 13F IRON MOUNTAIN Common equity shares 46284V101 7,842,594 -608,316 -7.20 286,097 -12.43 0.0294
2015-02-11 2014-12-31 13F IRON MOUNTAIN Common equity shares 462846106 8,450,910 898,560 11.90 326,713 32.50 0.0325
2014-11-12 2014-09-30 13F/A-1 IRON MOUNTAIN Common equity shares 462846106 7,552,350 467,912 6.60 246,583 -1.82 0.0265
2014-11-10 2014-09-30 13F IRON MOUNTAIN Common equity shares 462846106 7,552,350 246,583
2014-08-12 2014-06-30 13F IRON MOUNTAIN Common equity shares 462846106 7,084,438 294,076 4.33 251,146 34.16 0.0271
2014-05-15 2014-03-31 13F/A-1 IRON MOUNTAIN Common equity shares 462846106 6,790,362 -268,332 -3.80 187,205 -12.61 0.0213
2014-05-13 2014-03-31 13F IRON MOUNTAIN Common equity shares 462846106 6,790,362 187,205
2014-02-06 2013-12-31 13F/A-1 IRON MOUNTAIN Common equity shares 462846106 7,058,694 -1,186,097 -14.39 214,230 -3.84 0.0238
2014-02-06 2013-12-31 13F IRON MOUNTAIN Common equity shares 462846106 6,668,696 207,060
2013-11-12 2013-09-30 13F IRON MOUNTAIN Common equity shares 462846106 8,244,791 1,655,705 25.13 222,776 27.05 0.0275
2013-08-08 2013-06-30 13F IRON MOUNTAIN Common equity shares 462846106 6,589,086 6,589,086 175,341 0.0229
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.