WR伯克利公司
MX ˙ BMV ˙ US0844231029
SecurityMX:WRB / W. R. Berkley Corporation
InstitutionQube Research & Technologies Ltd
Latest Disclosed Ownership154,049 shares
Latest Disclosed Value $ 10,210,368
Qube Research & Technologies Ltd ownership in WRB / W. R. Berkley Corporation

On May 15, 2026 - Qube Research & Technologies Ltd filed a 13F-HR form disclosing ownership of 154,049 shares of W. R. Berkley Corporation (MX:WRB) valued at $10,210,368 USD as of March 31, 2026. The entity filed a previous 13F-HR on August 14, 2025 disclosing 0 shares of W. R. Berkley Corporation.

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 BERKLEY W R COM 084423102 154,049 154,049 10,210 0.0114
2025-08-14 2025-06-30 13F BERKLEY W R COM 084423102 0 -321,220 -100.00 0 -100.00
2025-05-15 2025-03-31 13F BERKLEY W R COM 084423102 321,220 121,480 60.82 22,858 95.57 0.0265
2025-02-14 2024-12-31 13F BERKLEY W R COM 084423102 199,740 11,038 5.85 11,689 9.18 0.0153
2024-11-14 2024-09-30 13F BERKLEY W R COM 084423102 188,702 79,169 72.28 10,705 24.38 0.0158
2024-08-14 2024-06-30 13F BERKLEY W R COM 084423102 109,533 107,205 4,605.03 8,607 4,098.54 0.0136
2024-05-14 2024-03-31 13F BERKLEY W R COM 084423102 2,328 1,362 140.99 206 201.47 0.0003
2024-02-13 2023-12-31 13F BERKLEY W R COM 084423102 966 -265,941 -99.64 68 -99.60 0.0001
2023-11-13 2023-09-30 13F BERKLEY W R COM 084423102 266,907 -91,200 -25.47 16,946 -20.55 0.0443
2023-08-14 2023-06-30 13F BERKLEY W R COM 084423102 358,107 -370,720 -50.87 21,329 -53.00 0.0775
2023-05-15 2023-03-31 13F BERKLEY W R COM 084423102 728,827 435,084 148.12 45,377 112.87 0.1952
2023-02-14 2022-12-31 13F BERKLEY W R COM 084423102 293,743 202,195 220.86 21,317 260.55 0.1141
2022-11-14 2022-09-30 13F BERKLEY W R COM 084423102 91,548 85,198 1,341.70 5,912 1,265.36 0.0352
2022-08-15 2022-06-30 13F BERKLEY W R COM 084423102 6,350 6,350 433 0.0032
2022-05-09 2022-03-31 13F BERKLEY W R COM 084423102 0 -80,221 -100.00 0 -100.00
2022-02-10 2021-12-31 13F/A-1 BERKLEY W R COM 084423102 80,221 80,221 6,609 0.0510
2022-02-01 2021-12-31 13F BERKLEY W R COM 084423102 80,221 80,221 6,609 0.0511
2021-11-12 2021-09-30 13F BERKLEY W R COM 084423102 0 -73,866 -100.00 0 -100.00
2021-08-13 2021-06-30 13F BERKLEY W R COM 084423102 73,866 43,014 139.42 5,498 136.47 0.0627
2021-05-14 2021-03-31 13F BERKLEY W R COM 084423102 30,852 -108,142 -77.80 2,325 -74.82 0.0369
2021-02-16 2020-12-31 13F BERKLEY W R COM 084423102 138,994 69,025 98.65 9,232 115.75 0.1313
2020-11-12 2020-09-30 13F BERKLEY W R COM 084423102 69,969 39,857 132.36 4,279 148.06 0.0611
2020-08-14 2020-06-30 13F BERKLEY W R COM 084423102 30,112 30,112 1,725 0.0253
2020-05-15 2020-03-31 13F BERKLEY W R COM 084423102 0 -16,304 -100.00 0 -100.00
2020-02-13 2019-12-31 13F BERKLEY W R COM 084423102 16,304 16,304 1,127 0.0354
2019-11-13 2019-09-30 13F BERKLEY W R COM 084423102 0 -5,896 -100.00 0 -100.00
2019-08-02 2019-06-30 13F BERKLEY W R COM 084423102 5,896 5,896 389 0.0926
2019-02-14 2018-12-31 13F W R BERKLEY COM 084423102 0 -3,267 -100.00 0 -100.00
2018-11-14 2018-09-30 13F W R BERKLEY COM 084423102 3,267 2,309 241.02 261 278.26 0.0347
2018-08-15 2018-06-30 13F/A-1 W R BERKLEY COM 084423102 958 958 69 0.0435
2018-08-14 2018-06-30 13F W R BERKLEY COM 084423102 958 69 0.0435
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.