Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
111,85 € ↑2,30 (2,10%)
2026-06-05
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionVectors Research Management, LLC
Latest Disclosed Ownership24,565 shares
Latest Disclosed Value $ 2,509,049
Vectors Research Management, LLC reports 34.71% decrease in ownership of I5M / Iron Mountain Incorporated

On May 5, 2026 - Vectors Research Management, LLC filed a 13F-HR form disclosing ownership of 24,565 shares of Iron Mountain Incorporated (DE:I5M) valued at $2,180,881 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 37,625 shares of Iron Mountain Incorporated. This represents a change in shares of -34.71% during the quarter. The current value of the position is $2,747,595 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)
2026-05-05 2026-03-31 13F IRON MTN INC DEL COM 46284V101 24,565 -13,060 -34.71 2,509 -19.61 0.7329
2026-02-03 2025-12-31 13F IRON MTN INC DEL COM 46284V101 37,625 -3,962 -9.53 3,121 -26.37 0.9525
2025-10-28 2025-09-30 13F IRON MTN INC DEL COM 46284V101 41,587 767 1.88 4,239 1.27 1.3360
2025-07-29 2025-06-30 13F IRON MTN INC DEL COM 46284V101 40,820 -1,256 -2.99 4,187 15.64 1.4351
2025-04-23 2025-03-31 13F IRON MTN INC DEL COM 46284V101 42,076 3,623 9.42 3,620 -10.42 1.2660
2025-02-13 2024-12-31 13F IRON MTN INC DEL COM 46284V101 38,453 -4,979 -11.46 4,042 80,720.00 1.3769
2024-11-06 2024-09-30 13F IRON MTN INC DEL COM 46284V101 43,432 1,780 4.27 5 66.67 1.5618
2024-08-09 2024-06-30 13F IRON MTN INC DEL COM 46284V101 41,652 542 1.32 4 0.00 1.1461
2024-05-15 2024-03-31 13F IRON MTN INC DEL COM 46284V101 41,110 23,653 135.49 3 0.00 0.9312
2024-02-12 2023-12-31 13F IRON MTN INC DEL COM 46284V101 17,457 -35,852 -67.25 3 50.00 0.8471
2023-11-09 2023-09-30 13F IRON MTN INC DEL COM 46284V101 53,309 -1,716 -3.12 3 -33.33 0.9353
2023-08-08 2023-06-30 13F IRON MTN INC DEL COM 46284V101 55,025 -5,441 -9.00 3 0.00 0.8890
2023-05-04 2023-03-31 13F IRON MTN INC DEL COM 46284V101 60,466 -2,022 -3.24 3 0.00 0.8247
2023-02-08 2022-12-31 13F Iron Mountain COM 46284V101 62,488 2,450 4.08 3 -99.89 0.8067
2022-11-08 2022-09-30 13F Iron Mountain COM 46284V101 60,038 -2,306 -3.70 2,640 -13.04 0.7465
2022-08-12 2022-06-30 13F Iron Mountain COM 46284V101 62,344 -1,389 -2.18 3,036 -14.02 0.7699
2022-05-16 2022-03-31 13F Iron Mountain COM 46284V101 63,733 8,910 16.25 3,531 23.07 0.7744
2022-02-15 2021-12-31 13F Iron Mountain COM 46284V101 54,823 2,000 3.79 2,869 25.01 0.6054
2021-11-12 2021-09-30 13F Iron Mountain COM 46284V101 52,823 3,038 6.10 2,295 8.92 0.5408
2021-08-09 2021-06-30 13F IRON MTN INC COM 46284V101 49,785 5,535 12.51 2,107 28.63 0.5372
2021-05-18 2021-03-31 13F Iron Mountain COM 46284V101 44,250 1,954 4.62 1,638 31.36 0.4512
2021-02-09 2020-12-31 13F IRON MTN INC COM 46284V101 42,296 -26,318 -38.36 1,247 -32.56 0.3831
2020-11-16 2020-09-30 13F IRON MTN INC COM 46284V101 68,614 3,425 5.25 1,849 8.70 0.6773
2020-08-13 2020-06-30 13F IRON MTN INC COM 46284V101 65,189 420 0.65 1,701 10.38 0.6709
2020-05-14 2020-03-31 13F IRON MTN INC COM 46284V101 64,769 12,597 24.15 1,541 -7.34 0.7324
2020-02-14 2019-12-31 13F IRON MTN INC COM 46284V101 52,172 20,101 62.68 1,663 60.06 0.6689
2019-11-15 2019-09-30 13F IRON MTN INC COM 46284V101 32,071 32,071 1,039 0.5104
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.