W. R. Berkley Corporation
US ˙ NYSE ˙ US0844231029

SecurityWRB / W. R. Berkley Corporation
Institution1832 Asset Management L.P.
Latest Disclosed Ownership2,293,921 shares
Latest Disclosed Value $ 152,041,084
1832 Asset Management L.P. reports 1.28% decrease in ownership of WRB / W. R. Berkley Corporation

On May 14, 2026 - 1832 Asset Management L.P. filed a 13F-HR form disclosing ownership of 2,293,921 shares of W. R. Berkley Corporation (US:WRB) valued at $152,041,084 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 2,323,657 shares of W. R. Berkley Corporation. This represents a change in shares of -1.28% during the quarter. The current value of the position is $157,294,163 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 BERKLEY W R COM 084423102 2,293,921 -29,736 -1.28 152,041 -6.69 0.1398
2026-02-13 2025-12-31 13F BERKLEY W R COM 084423102 2,323,657 -73,513 -3.07 162,935 -11.29 0.1241
2025-11-14 2025-09-30 13F BERKLEY W R COM 084423102 2,397,170 -237,641 -9.02 183,671 -5.12 0.1450
2025-08-13 2025-06-30 13F BERKLEY W R COM 084423102 2,634,811 -56,332 -2.09 193,580 1.09 0.1510
2025-05-14 2025-03-31 13F BERKLEY W R COM 084423102 2,691,143 -142,840 -5.04 191,502 15.47 0.1741
2025-02-14 2024-12-31 13F BERKLEY W R COM 084423102 2,833,983 -57,049 -1.97 165,845 1.12 0.1410
2024-11-13 2024-09-30 13F BERKLEY W R COM 084423102 2,891,032 961,101 49.80 164,008 62.22 0.1248
2024-08-13 2024-06-30 13F BERKLEY W R COM 084423102 1,929,931 26,464 1.39 101,103 -39.94 0.0821
2024-05-14 2024-03-31 13F BERKLEY W R COM 084423102 1,903,467 -45,635 -2.34 168,343 22.13 0.0996
2024-02-13 2023-12-31 13F BERKLEY W R COM 084423102 1,949,102 -69,081 -3.42 137,840 7.57 0.1985
2023-11-13 2023-09-30 13F BERKLEY W R COM 084423102 2,018,183 -5,195 -0.26 128,134 6.32 0.1817
2023-08-14 2023-06-30 13F BERKLEY W R COM 084423102 2,023,378 396,796 24.39 120,512 19.00 0.2343
2023-05-12 2023-03-31 13F BERKLEY W R COM 084423102 1,626,582 -286,651 -14.98 101,271 -27.06 0.2083
2023-02-15 2022-12-31 13F BERKLEY W R COM 084423102 1,913,233 279,617 17.12 138,843 31.61 0.2854
2022-11-14 2022-09-30 13F BERKLEY W R COM 084423102 1,633,616 -16,969 -1.03 105,499 -6.36 0.2247
2022-08-15 2022-06-30 13F BERKLEY W R COM 084423102 1,650,585 80,796 5.15 112,669 9.29 0.2270
2022-05-16 2022-03-31 13F BERKLEY W R COM 084423102 1,569,789 533,934 51.55 103,095 20.93 0.1683
2022-02-15 2021-12-31 13F BERKLEY W R COM 084423102 1,035,855 2,049 0.20 85,249 11.37 0.1509
2021-11-15 2021-09-30 13F BERKLEY W R COM 084423102 1,033,806 13,889 1.36 76,544 1.26 0.1434
2021-08-20 2021-06-30 13F/A-1 BERKLEY W R COM 084423102 1,019,917 23,961 2.41 75,594 -0.82 0.1462
2021-08-16 2021-06-30 13F BERKLEY W R COM 084423102 1,019,917 23,961 75,594 0.1464
2021-05-17 2021-03-31 13F BERKLEY W R COM 084423102 995,956 204,398 25.82 76,221 45.13 0.1647
2021-02-16 2020-12-31 13F BERKLEY W R COM 084423102 791,558 35,292 4.67 52,520 13.15 0.1228
2020-11-16 2020-09-30 13F BERKLEY W R COM 084423102 756,266 -407 -0.05 46,418 7.69 0.1212
2020-08-14 2020-06-30 13F BERKLEY W R COM 084423102 756,673 72,297 10.56 43,104 15.56 0.1294
2020-05-26 2020-03-31 13F/A-1 BERKLEY W R COM 084423102 684,376 163,642 31.43 37,300 3.79 0.1345
2020-05-14 2020-03-31 13F BERKLEY W R COM 084423102 96,426 -424,308 5,065 38,296.6497
2020-02-14 2019-12-31 13F BERKLEY W R COM 084423102 520,734 4,261 0.83 35,939 -3.15 0.1094
2019-11-14 2019-09-30 13F BERKLEY W R COM 084423102 516,473 6,240 1.22 37,109 11.42 0.1181
2019-08-14 2019-06-30 13F BERKLEY W R COM 084423102 510,233 183,786 56.30 33,307 20.52 0.1077
2019-05-15 2019-03-31 13F BERKLEY W R COM 084423102 326,447 11,780 3.74 27,636 18.79 0.0941
2019-02-14 2018-12-31 13F W R BERKLEY COM 084423102 314,667 2,938 0.94 23,265 -6.71 0.0920
2018-11-14 2018-09-30 13F W R BERKLEY COM 084423102 311,729 328 0.11 24,938 10.21 0.0813
2018-08-14 2018-06-30 13F W R BERKLEY COM 084423102 311,401 1,701 0.55 22,627 0.10 0.0766
2018-05-15 2018-03-31 13F W R BERKLEY COM 084423102 309,700 5,481 1.80 22,605 3.87 0.0833
2018-02-14 2017-12-31 13F BERKLEY W R COM 084423102 304,219 4,602 1.54 21,763 12.10 0.0707
2017-11-14 2017-09-30 13F BERKLEY W R COM 084423102 299,617 299,617 19,414 0.0680
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.