W. R. Berkley Corporation
MX ˙ BMV ˙ US0844231029
SecurityMX:WRB / W. R. Berkley Corporation
InstitutionProShare Advisors LLC
Latest Disclosed Ownership60,499 shares
Latest Disclosed Value $ 4,009,873
ProShare Advisors LLC reports 5.56% decrease in ownership of WRB / W. R. Berkley Corporation

On April 24, 2026 - ProShare Advisors LLC filed a 13F-HR form disclosing ownership of 60,499 shares of W. R. Berkley Corporation (MX:WRB) valued at $4,009,873 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 64,063 shares of W. R. Berkley Corporation. This represents a change in shares of -5.56% 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)
2026-04-24 2026-03-31 13F BERKLEY W R COM 084423102 60,499 -3,564 -5.56 4,010 -10.75 0.0059
2026-02-06 2025-12-31 13F BERKLEY W R COM 084423102 64,063 3,101 5.09 4,492 -3.81 0.0079
2025-11-06 2025-09-30 13F BERKLEY W R COM 084423102 60,962 -11,235 -15.56 4,671 -11.95 0.0098
2025-08-07 2025-06-30 13F BERKLEY W R COM 084423102 72,197 -4,632 -6.03 5,304 -2.98 0.0106
2025-05-08 2025-03-31 13F BERKLEY W R COM 084423102 76,829 1,196 1.58 5,467 23.52 0.0123
2025-02-14 2024-12-31 13F BERKLEY W R COM 084423102 75,633 5,514 7.86 4,426 11.29 0.0101
2024-11-14 2024-09-30 13F BERKLEY W R COM 084423102 70,119 20,809 42.20 3,978 2.66 0.0097
2024-08-13 2024-06-30 13F BERKLEY W R COM 084423102 49,310 10,053 25.61 3,875 11.61 0.0104
2024-05-08 2024-03-31 13F BERKLEY W R COM 084423102 39,257 -2,812 -6.68 3,472 16.67 0.0092
2024-02-14 2023-12-31 13F BERKLEY W R COM 084423102 42,069 -2,739 -6.11 2,975 4.61 0.0091
2023-11-13 2023-09-30 13F BERKLEY W R COM 084423102 44,808 -16,598 -27.03 2,845 -22.23 0.0089
2023-08-10 2023-06-30 13F BERKLEY W R COM 084423102 61,406 -2,176 -3.42 3,657 -7.60 0.0106
2023-05-26 2023-03-31 13F/A-1 BERKLEY W R COM 084423102 63,582 4,823 8.21 3,959 -7.18 0.0121
2023-05-12 2023-03-31 13F BERKLEY W R COM 084423102 63,582 4,823 3,959 0.0126
2023-02-02 2022-12-31 13F BERKLEY W R COM 084423102 58,759 640 1.10 4,264 13.62 0.0150
2022-11-07 2022-09-30 13F BERKLEY W R COM 084423102 58,119 -5,723 -8.96 3,753 -13.90 0.0144
2022-08-01 2022-06-30 13F BERKLEY W R COM 084423102 63,842 -19,029 -22.96 4,359 -21.00 0.0145
2022-05-10 2022-03-31 13F BERKLEY W R COM 084423102 82,871 25,846 45.32 5,518 17.45 0.0119
2022-02-08 2021-12-31 13F BERKLEY W R COM 084423102 57,025 5,844 11.42 4,698 25.45 0.0092
2021-11-12 2021-09-30 13F BERKLEY W R COM 084423102 51,181 640 1.27 3,745 -0.45 0.0105
2021-08-13 2021-06-30 13F BERKLEY W R COM 084423102 50,541 3,339 7.07 3,762 5.76 0.0110
2021-05-14 2021-03-31 13F BERKLEY W R COM 084423102 47,202 1,419 3.10 3,557 16.97 0.0112
2021-02-09 2020-12-31 13F BERKLEY W R COM 084423102 45,783 1,201 2.69 3,041 11.56 0.0113
2020-11-13 2020-09-30 13F BERKLEY W R COM 084423102 44,582 -1,369 -2.98 2,726 3.53 0.0126
2020-08-03 2020-06-30 13F BERKLEY W R COM 084423102 45,951 -4,386 -8.71 2,633 0.27 0.0141
2020-05-15 2020-03-31 13F BERKLEY W R COM 084423102 50,337 267 0.53 2,626 -24.10 0.0189
2020-02-12 2019-12-31 13F BERKLEY W R COM 084423102 50,070 -184,384 -78.64 3,460 -79.57 0.0160
2019-11-12 2019-09-30 13F BERKLEY W R COM 084423102 234,454 -14,357 -5.77 16,935 3.24 0.0948
2019-08-13 2019-06-30 13F BERKLEY W R COM 084423102 248,811 87,393 54.14 16,404 19.96 0.0981
2019-05-15 2019-03-31 13F BERKLEY W R COM 084423102 161,418 25,185 18.49 13,675 35.81 0.0818
2019-02-14 2018-12-31 13F W R BERKLEY COM 084423102 136,233 10,158 8.06 10,069 -0.08 0.0705
2018-11-14 2018-09-30 13F W R BERKLEY COM 084423102 126,075 5,381 4.46 10,077 15.31 0.0684
2018-08-13 2018-06-30 13F W R BERKLEY COM 084423102 120,694 -12,629 -9.47 8,739 -9.84 0.0586
2018-05-14 2018-03-31 13F W R BERKLEY COM 084423102 133,323 -29,437 -18.09 9,693 -16.88 0.0632
2018-02-14 2017-12-31 13F BERKLEY W R COM 084423102 162,760 12,064 8.01 11,662 15.96 0.0809
2017-11-13 2017-09-30 13F BERKLEY W R COM 084423102 150,696 -5,340 -3.42 10,057 -6.82 0.0924
2017-08-11 2017-06-30 13F BERKLEY W R COM 084423102 156,036 -414 -0.26 10,793 -2.33 0.1075
2017-05-12 2017-03-31 13F/A-2 BERKLEY W R COM 084423102 156,450 133,885 593.33 11,050 636.18 0.1156
2017-05-08 2017-03-31 13F/A-1 BERKLEY W R COM 084423102 156,450 0 11,050 0.1155
2017-04-25 2017-03-31 13F BERKLEY W R COM 084423102 156,450 11,050
2017-02-13 2016-12-31 13F BERKLEY W R COM 084423102 22,565 1,734 8.32 1,501 24.77 0.0166
2016-11-10 2016-09-30 13F BERKLEY W R COM 084423102 20,831 -1,174 -5.34 1,203 -8.79 0.0168
2016-08-12 2016-06-30 13F BERKLEY W R COM 084423102 22,005 -1,434 -6.12 1,319 0.15 0.0170
2016-05-06 2016-03-31 13F BERKLEY W R COM 084423102 23,439 -1,869 -7.39 1,317 -4.98 0.0181
2016-02-05 2015-12-31 13F BERKLEY W R COM 084423102 25,308 1,870 7.98 1,386 8.79 0.0168
2015-11-06 2015-09-30 13F BERKLEY W R COM 084423102 23,438 -5,294 -18.43 1,274 -14.61 0.0179
2015-08-11 2015-06-30 13F BERKLEY W R COM 084423102 28,732 -1,918 -6.26 1,492 -3.62 0.0206
2015-05-08 2015-03-31 13F BERKLEY W R COM 084423102 30,650 30,650 0.00 1,548 0.0182
2015-01-30 2014-12-31 13F BERKLEY W R COM 084423102 0 -69,649 -100.00 0 -100.00
2014-11-06 2014-09-30 13F BERKLEY W R COM 084423102 69,649 3,477 5.25 3,329 8.65 0.0441
2014-08-08 2014-06-30 13F BERKLEY W R COM 084423102 66,172 36,197 120.76 3,064 145.51 0.0397
2014-05-07 2014-03-31 13F BERKLEY W R COM 084423102 29,975 -67,967 -69.40 1,248 -70.64 0.0156
2014-02-04 2013-12-31 13F BERKLEY W R COM 084423102 97,942 68,303 230.45 4,250 234.65 0.0633
2013-11-07 2013-09-30 13F BERKLEY W R COM 084423102 29,639 3,933 15.30 1,270 20.95 0.0301
2013-07-25 2013-06-30 13F BERKLEY W R COM 084423102 25,706 25,706 1,050 0.0206
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.