W. R. Berkley Corporation
MX ˙ BMV ˙ US0844231029
SecurityMX:WRB / W. R. Berkley Corporation
InstitutionDean Capital Management
Latest Disclosed Ownership33,168 shares
Latest Disclosed Value $ 2,198,375
Dean Capital Management reports 0.01% decrease in ownership of WRB / W. R. Berkley Corporation

On May 15, 2026 - Dean Capital Management filed a 13F-HR form disclosing ownership of 33,168 shares of W. R. Berkley Corporation (MX:WRB) valued at $2,198,375 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 20, 2026 disclosing 33,170 shares of W. R. Berkley Corporation. This represents a change in shares of -0.01% during the quarter.

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 WR Berkley CS 084423102 33,168 -2 -0.01 2,198 -5.46 0.9060
2026-02-20 2025-12-31 13F WR Berkley CS 084423102 33,170 1,013 3.15 2,326 -5.60 0.9910
2025-11-14 2025-09-30 13F WR Berkley CS 084423102 32,157 0 0.00 2,464 4.28 0.9607
2025-08-14 2025-06-30 13F WR Berkley CS 084423102 32,157 1,720 5.65 2,363 9.10 0.9710
2025-05-16 2025-03-31 13F WR Berkley CS 084423102 30,437 703 2.36 2,166 24.43 0.9437
2025-02-14 2024-12-31 13F WR Berkley CS 084423102 29,734 388 1.32 1,740 4.57 0.7409
2024-11-14 2024-09-30 13F WR Berkley CS 084423102 29,346 29,346 1,665 0.7068
2024-08-14 2024-06-30 13F WR Berkley CS 084423102 0 -19,564 -100.00 0 -100.00
2024-05-14 2024-03-31 13F WR Berkley CS 084423102 19,564 -2,049 -9.48 1,730 13.22 1.0067
2024-02-14 2023-12-31 13F WR Berkley CS 084423102 21,613 1,080 5.26 1,528 17.27 0.9439
2023-11-14 2023-09-30 13F WR Berkley CS 084423102 20,533 20,533 1,304 0.9761
2021-05-11 2021-03-31 13F WR Berkley CS 084423102 0 -9,770 -100.00 0 -100.00
2021-02-16 2020-12-31 13F WR Berkley CS 084423102 9,770 -606 -5.84 649 2.37 0.3848
2020-11-16 2020-09-30 13F WR Berkley CS 084423102 10,376 177 1.74 634 8.56 0.6531
2020-08-14 2020-06-30 13F WR Berkley CS 084423102 10,199 1,106 12.16 584 23.21 0.6817
2020-05-14 2020-03-31 13F WR Berkley CS 084423102 9,093 359 4.11 474 -21.52 0.7042
2020-02-13 2019-12-31 13F/A-1 WR Berkley CS 084423102 8,734 1,166 15.41 604 10.42 0.5733
2020-02-13 2019-12-31 13F WR Berkley CS 084423102 8,734 604
2019-11-14 2019-09-30 13F WR Berkley CS 084423102 7,568 -2,913 -27.79 547 -20.84 0.5648
2019-08-14 2019-06-30 13F WR Berkley CS 084423102 10,481 10,481 691 0.7193
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.