W. R. Berkley Corporation
MX ˙ BMV ˙ US0844231029
SecurityMX:WRB / W. R. Berkley Corporation
InstitutionRockefeller Capital Management L.P.
Latest Disclosed Ownership278,500 shares
Latest Disclosed Value $ 18,459,026
Rockefeller Capital Management L.P. reports 1.33% decrease in ownership of WRB / W. R. Berkley Corporation

On May 14, 2026 - Rockefeller Capital Management L.P. filed a 13F-HR form disclosing ownership of 278,500 shares of W. R. Berkley Corporation (MX:WRB) valued at $18,459,026 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 16, 2026 disclosing 282,266 shares of W. R. Berkley Corporation. This represents a change in shares of -1.33% 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)
2026-05-14 2026-03-31 13F BERKLEY W R COM 084423102 278,500 -3,766 -1.33 18,459 -6.74 0.0327
2026-03-16 2025-12-31 13F/A-1 BERKLEY W R COM 084423102 282,266 37,999 15.56 19,793 5.75 0.0356
2026-02-14 2025-12-31 13F BERKLEY W R COM 084423102 282,272 38,005 19,793 0.0181
2025-11-14 2025-09-30 13F BERKLEY W R COM 084423102 244,267 -6,103 -2.44 18,716 1.75 0.0366
2025-08-14 2025-06-30 13F/A-1 BERKLEY W R COM 084423102 250,370 -9,169 -3.53 18,395 -0.40 0.0403
2025-08-08 2025-06-30 13F BERKLEY W R COM 084423102 250,370 -9,169 18,395 0.0232
2025-05-14 2025-03-31 13F BERKLEY W R COM 084423102 259,539 11,378 4.58 18,469 27.16 0.0456
2025-02-13 2024-12-31 13F BERKLEY W R COM 084423102 248,161 -3,990 -1.58 14,524 1.52 0.0376
2024-11-14 2024-09-30 13F BERKLEY W R COM 084423102 252,151 116,773 86.26 14,306 34.48 0.0385
2024-08-12 2024-06-30 13F BERKLEY W R COM 084423102 135,378 100,197 284.80 10,639 241.95 0.0302
2024-05-14 2024-03-31 13F BERKLEY W R COM 084423102 35,181 6,819 24.04 3,111 55.16 0.0091
2024-02-14 2023-12-31 13F BERKLEY W R COM 084423102 28,362 -2,039 -6.71 2,006 3.89 0.0067
2023-11-14 2023-09-30 13F BERKLEY W R COM 084423102 30,401 -776 -2.49 1,930 3.99 0.0074
2023-08-14 2023-06-30 13F BERKLEY W R COM 084423102 31,177 2,061 7.08 1,857 185,500.00 0.0072
2023-05-16 2023-03-31 13F BERKLEY W R COM 084423102 29,116 249 0.86 2 -99.95 0.0078
2023-03-06 2022-12-31 13F BERKLEY W R COM 084423102 28,867 -3,646 -11.21 2,094 -0.24 0.0105
2022-11-02 2022-09-30 13F BERKLEY W R COM 084423102 32,513 -2,010 -5.82 2,099 -10.87 0.0108
2022-08-12 2022-06-30 13F BERKLEY W R COM 084423102 34,523 -112 -0.32 2,355 2.12 0.0125
2022-05-13 2022-03-31 13F BERKLEY W R COM 084423102 34,635 11,564 50.12 2,306 21.37 0.0111
2022-02-14 2021-12-31 13F BERKLEY W R COM 084423102 23,071 -220 -0.94 1,900 11.57 0.0089
2021-11-12 2021-09-30 13F BERKLEY W R COM 084423102 23,291 554 2.44 1,703 0.71 0.0089
2021-08-10 2021-06-30 13F BERKLEY W R COM 084423102 22,737 35 0.15 1,691 -1.05 0.0095
2021-05-11 2021-03-31 13F BERKLEY W R COM 084423102 22,702 277 1.24 1,709 14.78 0.0116
2021-02-12 2020-12-31 13F BERKLEY W R COM 084423102 22,425 10,443 87.16 1,489 103.69 0.0113
2020-11-13 2020-09-30 13F BERKLEY W R COM 084423102 11,982 553 4.84 731 11.60 0.0068
2020-08-12 2020-06-30 13F BERKLEY W R COM 084423102 11,429 8,795 333.90 655 378.10 0.0069
2020-05-12 2020-03-31 13F BERKLEY W R COM 084423102 2,634 847 47.40 137 11.38 0.0018
2020-02-07 2019-12-31 13F BERKLEY W R COM 084423102 1,787 0 0.00 123 -4.65 0.0015
2019-11-12 2019-09-30 13F BERKLEY W R COM 084423102 1,787 0 0.00 129 10.26 0.0017
2019-08-09 2019-06-30 13F BERKLEY W R COM 084423102 1,787 -741 -29.31 117 -45.33 0.0016
2019-05-10 2019-03-31 13F BERKLEY W R COM 084423102 2,528 1,503 146.63 214 181.58 0.0031
2019-02-12 2018-12-31 13F W R BERKLEY COM 084423102 1,025 0 0.00 76 -7.32 0.0013
2018-11-02 2018-09-30 13F W.R. Berkley Common 084423102 1,025 0 0.00 82 10.81 0.0012
2018-07-31 2018-06-30 13F W.R. Berkley Common 084423102 1,025 0 0.00 74 -1.33 0.0012
2018-05-09 2018-03-31 13F W.R. Berkley Common 084423102 1,025 1,025 75 0.0012
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.