Iron Mountain Incorporated
GB ˙ LSE ˙ US46284V1017
126,74 $ ↓ -1,89 (-1,47%)
2026-06-05
DEL PRIS
SecurityGB:0JDP / Iron Mountain Incorporated
InstitutionLee Danner & Bass Inc
Latest Disclosed Ownership67,141 shares
Latest Disclosed Value $ 6,857,782
Lee Danner & Bass Inc reports 2.96% increase in ownership of 0JDP / Iron Mountain Incorporated

On April 28, 2026 - Lee Danner & Bass Inc filed a 13F-HR form disclosing ownership of 67,141 shares of Iron Mountain Incorporated (GB:0JDP) valued at $6,834,665 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 65,208 shares of Iron Mountain Incorporated. This represents a change in shares of 2.96% during the quarter. The current value of the position is $8,509,450 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)
2026-04-28 2026-03-31 13F IRON MOUNTAIN REIT 46284V101 67,141 1,933 2.96 6,858 26.77 0.4308
2026-01-29 2025-12-31 13F IRON MOUNTAIN REIT 46284V101 65,208 22,625 53.13 5,409 24.63 0.3877
2025-10-29 2025-09-30 13F IRON MOUNTAIN REIT 46284V101 42,583 883 2.12 4,341 1.47 0.3158
2025-07-31 2025-06-30 13F IRON MTN INC DEL COM REIT 46284V101 41,700 5,675 15.75 4,277 38.01 0.3327
2025-04-29 2025-03-31 13F IRON MTN INC DEL COM REIT 46284V101 36,025 1,575 4.57 3,100 -14.42 0.2507
2025-02-11 2024-12-31 13F IRON MTN INC DEL COM REIT 46284V101 34,450 9,245 36.68 3,621 180,950.00 0.2869
2024-10-30 2024-09-30 13F Iron Mountain COM 46284V101 25,205 780 3.19 3 0.00 0.2109
2024-07-30 2024-06-30 13F Iron Mountain COM 46284V101 24,425 2,650 12.17 2 100.00 0.1687
2024-02-01 2023-12-31 13F Iron Mountain COM 46284V101 21,775 11,825 118.84 2 0.1306
2023-10-27 2023-09-30 13F Iron Mountain COM 46284V101 9,950 -6,738 -40.38 1 0.0536
2023-07-31 2023-06-30 13F Iron Mountain COM 46284V101 16,688 -235 -1.39 1 0.0816
2023-05-02 2023-03-31 13F Iron Mountain COM 46284V101 16,923 0 0.00 1 0.0823
2023-02-01 2022-12-31 13F Iron Mountain COM 46284V101 16,923 0 0.00 1 -100.00 0.0796
2022-10-31 2022-09-30 13F Iron Mountain COM 46284V101 16,923 0 0.00 744 -9.71 0.0787
2022-07-25 2022-06-30 13F Iron Mountain COM 46284V101 16,923 0 0.00 824 -12.15 0.0832
2022-04-27 2022-03-31 13F Iron Mountain COM 46284V101 16,923 700 4.31 938 10.48 0.0799
2022-01-27 2021-12-31 13F Iron Mountain COM 46284V101 16,223 2,710 20.05 849 44.63 0.0727
2021-11-01 2021-09-30 13F Iron Mountain COM 46284V101 13,513 3,905 40.64 587 44.23 0.0541
2021-07-27 2021-06-30 13F Iron Mountain COM 46284V101 9,608 9,608 407 0.0369
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.