Iron Mountain Incorporated
GB ˙ LSE ˙ US46284V1017
126,74 $ ↓ -1,89 (-1,47%)
2026-06-05
DEL PRIS
SecurityGB:0JDP / Iron Mountain Incorporated
InstitutionKinneret Advisory, LLC
Latest Disclosed Ownership11,038 shares
Latest Disclosed Value $ 1,136,958
Kinneret Advisory, LLC reports 4.25% decrease in ownership of 0JDP / Iron Mountain Incorporated

On May 14, 2026 - Kinneret Advisory, LLC filed a 13F-HR form disclosing ownership of 11,038 shares of Iron Mountain Incorporated (GB:0JDP) valued at $1,123,621 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 11,528 shares of Iron Mountain Incorporated. This represents a change in shares of -4.25% during the quarter. The current value of the position is $1,398,956 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 11,038 -490 -4.25 1,137 17.60 0.1078
2026-02-12 2025-12-31 13F IRON MTN INC DEL COM 46284V101 11,528 -315 -2.66 966 -20.56 0.0819
2025-11-05 2025-09-30 13F IRON MTN INC DEL COM 46284V101 11,843 -53 -0.45 1,217 -1.06 0.1035
2025-07-25 2025-06-30 13F IRON MTN INC DEL COM 46284V101 11,896 -19 -0.16 1,230 18.86 0.1120
2025-07-21 2025-03-31 13F/A-1 IRON MTN INC DEL COM 46284V101 11,915 -40 -0.33 1,035 -18.26 0.1043
2025-04-29 2025-03-31 13F IRON MTN INC DEL COM 46284V101 8,020 -3,935 696 0.1043
2025-02-03 2024-12-31 13F IRON MTN INC DEL COM 46284V101 11,955 -557 -4.45 1,265 -15.38 0.1195
2024-11-04 2024-09-30 13F IRON MTN INC DEL COM 46284V101 12,512 -164 -1.29 1,496 30.80 0.1372
2024-07-26 2024-06-30 13F IRON MTN INC DEL COM 46284V101 12,676 683 5.69 1,144 17.96 0.1097
2024-04-25 2024-03-31 13F IRON MTN INC DEL COM 46284V101 11,993 -37 -0.31 970 14.13 0.0969
2024-02-14 2023-12-31 13F IRON MTN INC DEL COM 46284V101 12,030 -77 -0.64 850 16.78 0.0941
2023-10-12 2023-09-30 13F IRON MTN INC DEL COM 46284V101 12,107 -7 -0.06 728 4.60 0.0899
2023-08-02 2023-06-30 13F IRON MTN INC DEL COM 46284V101 12,114 0 0.00 696 7.25 0.0824
2023-04-27 2023-03-31 13F IRON MTN INC DEL COM 46284V101 12,114 -651 -5.10 648 0.62 0.0837
2023-02-14 2022-12-31 13F IRON MTN INC DEL COM 46284V101 12,765 -14,100 -52.48 644 -46.24 0.0852
2022-11-02 2022-09-30 13F IRON MTN INC DEL COM 46284V101 26,865 0 0.00 1,198 -9.58 0.1662
2022-08-04 2022-06-30 13F IRON MTN INC COM 46284V101 26,865 569 2.16 1,325 -10.05 0.1719
2022-05-13 2022-03-31 13F IRON MTN INC COM 46284V101 26,296 588 2.29 1,473 8.23 0.1617
2022-02-08 2021-12-31 13F IRON MTN INC COM 46284V101 25,708 0 0.00 1,361 20.12 0.1409
2021-11-09 2021-09-30 13F IRON MTN INC COM 46284V101 25,708 0 0.00 1,133 2.63 0.1328
2021-08-16 2021-06-30 13F IRON MTN INC COM 46284V101 25,708 0 0.00 1,104 14.17 0.1305
2021-05-13 2021-03-31 13F IRON MTN INC COM 46284V101 25,708 0 0.00 967 24.94 0.1241
2021-02-11 2020-12-31 13F IRON MTN INC COM 46284V101 25,708 0 0.00 774 9.79 0.1051
2020-11-13 2020-09-30 13F IRON MTN INC COM 46284V101 25,708 -827 -3.12 705 -0.56 0.1069
2020-08-12 2020-06-30 13F IRON MTN INC COM 46284V101 26,535 0 0.00 709 9.41 0.1140
2020-05-14 2020-03-31 13F IRON MTN INC COM 46284V101 26,535 2,969 12.60 648 -15.40 0.1262
2020-02-10 2019-12-31 13F IRON MTN INC COM 46284V101 23,566 0 0.00 766 -1.54 0.1393
2019-11-13 2019-09-30 13F IRON MTN INC COM 46284V101 23,566 0 0.00 778 3.46 0.1549
2019-08-13 2019-06-30 13F IRON MTN INC COM 46284V101 23,566 0 0.00 752 -10.05 0.1524
2019-05-15 2019-03-31 13F IRON MTN INC COM 46284V101 23,566 23,566 836 0.1759
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.