W. R. Berkley Corporation
US ˙ NYSE ˙ US0844231029

SecurityWRB / W. R. Berkley Corporation
InstitutionMan Group plc
Latest Disclosed Ownership63,710 shares
Latest Disclosed Value $ 4,222,699
Man Group plc reports 38.13% decrease in ownership of WRB / W. R. Berkley Corporation

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 63,710 shares of W. R. Berkley Corporation (US:WRB) valued at $4,222,699 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 102,970 shares of W. R. Berkley Corporation. This represents a change in shares of -38.13% during the quarter. The current value of the position is $4,159,626 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)
2026-05-15 2026-03-31 13F BERKLEY W R COM 084423102 63,710 -39,260 -38.13 4,223 -41.52 0.0077
2026-02-17 2025-12-31 13F BERKLEY W R COM 084423102 102,970 -549 -0.53 7,220 -8.96 0.0123
2025-11-14 2025-09-30 13F BERKLEY W R COM 084423102 103,519 -20,856 -16.77 7,932 -13.20 0.0138
2025-08-14 2025-06-30 13F BERKLEY W R COM 084423102 124,375 -25,173 -16.83 9,138 -14.13 0.0174
2025-05-15 2025-03-31 13F BERKLEY W R COM 084423102 149,548 -2,106 -1.39 10,642 19.91 0.0270
2025-02-14 2024-12-31 13F BERKLEY W R COM 084423102 151,654 -45,299 -23.00 8,875 -20.58 0.0234
2024-11-14 2024-09-30 13F BERKLEY W R COM 084423102 196,953 54,756 38.51 11,173 0.00 0.0291
2024-08-14 2024-06-30 13F BERKLEY W R COM 084423102 142,197 -136,816 -49.04 11,174 -54.72 0.0282
2024-05-15 2024-03-31 13F BERKLEY W R COM 084423102 279,013 11,771 4.40 24,676 30.56 0.0622
2024-02-14 2023-12-31 13F BERKLEY W R COM 084423102 267,242 18,899 -14.07 0.0526
2023-11-14 2023-09-30 13F BERKLEY W R COM 084423102 21,995 -20.10 0.0681
2023-08-14 2023-06-30 13F BERKLEY W R COM 084423102 462,183 27,528 -46.96 0.0849
2023-05-15 2023-03-31 13F BERKLEY W R COM 084423102 51,897 -25.53 0.1846
2023-02-14 2022-12-31 13F BERKLEY W R COM 084423102 960,353 452,537 89.11 69,693 112.51 0.2498
2022-11-14 2022-09-30 13F BERKLEY W R COM 084423102 507,816 32,795 178.70 0.1522
2022-08-15 2022-06-30 13F BERKLEY W R COM 084423102 11,767 201.95 0.0499
2022-05-16 2022-03-31 13F BERKLEY W R COM 084423102 58,523 7,408 14.49 3,897 -7.46 0.0136
2022-02-14 2021-12-31 13F BERKLEY W R COM 084423102 51,115 -72,971 -58.81 4,211 -53.62 0.0135
2021-11-15 2021-09-30 13F BERKLEY W R COM 084423102 124,086 64,082 106.80 9,080 103.31 0.0318
2021-08-16 2021-06-30 13F BERKLEY W R COM 084423102 60,004 55,861 1,348.32 4,466 1,331.41 0.0157
2021-05-17 2021-03-31 13F BERKLEY W R COM 084423102 4,143 -2,862 -40.86 312 -33.05 0.0014
2021-02-16 2020-12-31 13F BERKLEY W R COM 084423102 7,005 166 2.43 466 11.48 0.0020
2020-11-16 2020-09-30 13F BERKLEY W R COM 084423102 6,839 -3,518 -33.97 418 -29.51 0.0016
2020-08-14 2020-06-30 13F BERKLEY W R COM 084423102 10,357 -38,416 -78.76 593 -76.70 0.0030
2020-05-15 2020-03-31 13F BERKLEY W R COM 084423102 48,773 -126,686 -72.20 2,545 -79.01 0.0165
2020-02-18 2019-12-31 13F BERKLEY W R COM 084423102 175,459 19,162 12.26 12,124 7.39 0.0399
2019-11-14 2019-09-30 13F BERKLEY W R COM 084423102 156,297 10,533 7.23 11,290 17.47 0.0419
2019-08-14 2019-06-30 13F BERKLEY W R COM 084423102 145,764 59,656 69.28 9,611 31.75 0.0347
2019-05-15 2019-03-31 13F BERKLEY W R COM 084423102 86,108 25,175 41.32 7,295 61.97 0.0277
2019-02-14 2018-12-31 13F W R BERKLEY COM 084423102 60,933 4,691 8.34 4,504 0.18 0.0200
2018-11-14 2018-09-30 13F W R BERKLEY COM 084423102 56,242 8,512 17.83 4,496 30.13 0.0164
2018-08-14 2018-06-30 13F W R BERKLEY COM 084423102 47,730 -5,746 -10.75 3,455 -11.14 0.0142
2018-05-15 2018-03-31 13F W R BERKLEY COM 084423102 53,476 53,476 3,888 0.0178
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.