W. R. Berkley Corporation
MX ˙ BMV ˙ US0844231029
SecurityMX:WRB / W. R. Berkley Corporation
InstitutionDaiwa Securities Group Inc.
Latest Disclosed Ownership56,913 shares
Latest Disclosed Value $ 3,772,194
Daiwa Securities Group Inc. reports 6.17% decrease in ownership of WRB / W. R. Berkley Corporation

On May 13, 2026 - Daiwa Securities Group Inc. filed a 13F-HR form disclosing ownership of 56,913 shares of W. R. Berkley Corporation (MX:WRB) valued at $3,772,194 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 60,658 shares of W. R. Berkley Corporation. This represents a change in shares of -6.17% 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)
2026-05-13 2026-03-31 13F BERKLEY W R COM 084423102 56,913 -3,745 -6.17 3,772 94,200.00 0.0108
2026-02-10 2025-12-31 13F BERKLEY W R COM 084423102 60,658 -7,886 -11.51 4 -20.00 0.0136
2025-11-14 2025-09-30 13F BERKLEY W R COM 084423102 68,544 -1,314 -1.88 5 0.00 0.0177
2025-08-14 2025-06-30 13F BERKLEY W R COM 084423102 69,858 10,709 18.11 5 25.00 0.0189
2025-05-13 2025-03-31 13F BERKLEY W R COM 084423102 59,149 142 0.24 4 33.33 0.0178
2025-02-07 2024-12-31 13F BERKLEY W R COM 084423102 59,007 -108 -0.18 3 0.00 0.0154
2024-11-12 2024-09-30 13F BERKLEY W R COM 084423102 59,115 22,095 59.68 3 200.00 0.0155
2024-08-07 2024-06-30 13F BERKLEY W R COM 084423102 37,020 911 2.52 2 -66.67 0.0103
2024-05-02 2024-03-31 13F BERKLEY W R COM 084423102 36,109 1,146 3.28 3 50.00 0.0180
2024-01-31 2023-12-31 13F BERKLEY W R COM 084423102 34,963 308 0.89 2 0.00 0.0154
2023-11-01 2023-09-30 13F BERKLEY W R COM 084423102 34,655 2,577 8.03 2 100.00 0.0157
2023-07-31 2023-06-30 13F BERKLEY W R COM 084423102 32,078 80 0.25 2 0.00 0.0126
2023-05-02 2023-03-31 13F BERKLEY W R COM 084423102 31,998 236 0.74 2 -50.00 0.0139
2023-02-06 2022-12-31 13F BERKLEY W R COM 084423102 31,762 -3,709 -10.46 2 -99.91 0.0177
2022-11-02 2022-09-30 13F BERKLEY W R COM 084423102 35,471 -346 -0.97 2,290 -6.34 0.0190
2022-08-09 2022-06-30 13F BERKLEY W R COM 084423102 35,817 -4,998 -12.25 2,445 -10.04 0.0187
2022-04-29 2022-03-31 13F BERKLEY W R COM 084423102 40,815 13,359 48.66 2,718 20.16 0.0126
2022-02-03 2021-12-31 13F BERKLEY W R COM 084423102 27,456 -2,314 -7.77 2,262 3.81 0.0133
2021-11-05 2021-09-30 13F BERKLEY W R COM 084423102 29,770 684 2.35 2,179 0.65 0.0143
2021-08-06 2021-06-30 13F BERKLEY W R COM 084423102 29,086 -2,759 -8.66 2,165 -9.79 0.0146
2021-05-03 2021-03-31 13F BERKLEY W R COM 084423102 31,845 -1,513 -4.54 2,400 8.30 0.0179
2021-02-04 2020-12-31 13F BERKLEY W R COM 084423102 33,358 -3,683 -9.94 2,216 -2.16 0.0171
2020-11-02 2020-09-30 13F BERKLEY W R COM 084423102 37,041 -7,401 -16.65 2,265 443.17 0.0205
2020-08-11 2020-06-30 13F BERKLEY W R COM 084423102 44,442 0 0.00 417 -82.01 0.0088
2020-05-14 2020-03-31 13F BERKLEY W R COM 084423102 44,442 -3,705 -7.70 2,318 -30.33 0.0241
2020-01-31 2019-12-31 13F BERKLEY W R COM 084423102 48,147 -7,127 -12.89 3,327 -16.66 0.0275
2019-11-04 2019-09-30 13F BERKLEY W R COM 084423102 55,274 -4,869 -8.10 3,992 0.68 0.0338
2019-07-24 2019-06-30 13F BERKLEY W R COM 084423102 60,143 14,008 30.36 3,965 52.15 0.0350
2019-04-26 2019-03-31 13F BERKLEY W R COM 084423102 46,135 -6,116 -11.71 2,606 -32.52 0.0228
2019-02-05 2018-12-31 13F W R BERKLEY COM 084423102 52,251 5,459 11.67 3,862 3.26 0.0370
2018-11-01 2018-09-30 13F W R BERKLEY COM 084423102 46,792 -6,774 -12.65 3,740 -3.58 0.0313
2018-07-30 2018-06-30 13F W R BERKLEY COM 084423102 53,566 28,630 114.81 3,879 113.95 0.0306
2018-05-02 2018-03-31 13F W R BERKLEY COM 084423102 24,936 22,036 759.86 1,813 771.63 0.0145
2018-02-06 2017-12-31 13F BERKLEY W R COM 084423102 2,900 200 7.41 208 15.56 0.0015
2017-11-02 2017-09-30 13F BERKLEY W R COM 084423102 2,700 0 0.00 180 -3.74 0.0012
2017-07-28 2017-06-30 13F BERKLEY W R COM 084423102 2,700 0 0.00 187 -2.09 0.0012
2017-05-02 2017-03-31 13F BERKLEY W R COM 084423102 2,700 400 17.39 191 24.84 0.0012
2017-02-01 2016-12-31 13F BERKLEY W R COM 084423102 2,300 0 0.00 153 15.04 0.0010
2017-01-10 2016-09-30 13F/A-1 BERKLEY W R COM 084423102 2,300 0 0.00 133 -3.62 0.0008
2016-11-04 2016-09-30 13F BERKLEY W R COM 084423102 2,300 133
2016-07-25 2016-06-30 13F BERKLEY W R COM 084423102 2,300 0 0.00 138 6.98 0.0008
2016-05-12 2016-03-31 13F BERKLEY W R COM 084423102 2,300 0 0.00 129 2.38 0.0008
2016-02-04 2015-12-31 13F BERKLEY W R COM 084423102 2,300 -2,300 -50.00 126 -49.60 0.0008
2015-11-10 2015-09-30 13F BERKLEY W R COM 084423102 4,600 2,000 76.92 250 85.19 0.0018
2015-08-05 2015-06-30 13F BERKLEY W R COM 084423102 2,600 -3,500 -57.38 135 -56.17 0.0010
2015-05-12 2015-03-31 13F BERKLEY W R COM 084423102 6,100 3,100 103.33 308 100.00 0.0021
2015-02-13 2014-12-31 13F BERKLEY W R COM 084423102 3,000 -1,200 -28.57 154 -23.38 0.0011
2014-11-12 2014-09-30 13F BERKLEY W R COM 084423102 4,200 0 0.00 201 3.08 0.0015
2014-08-13 2014-06-30 13F/A-1 BERKLEY W R COM 084423102 4,200 0 195 0.0015
2014-08-13 2014-06-30 13F/A-2 BERKLEY W R COM 084423102 4,200 0 0.00 195 11.43 0.0042
2014-08-13 2014-06-30 13F BERKLEY W R COM 084423102 4,200 195
2014-05-14 2014-03-31 13F/A-1 BERKLEY W R COM 084423102 4,200 0 175 0.0014
2014-05-15 2014-03-31 13F/A-2 BERKLEY W R COM 084423102 4,200 0 0.00 175 -3.85 0.0014
2014-05-13 2014-03-31 13F BERKLEY W R COM 084423102 4,200 175
2014-02-13 2013-12-31 13F BERKLEY W R COM 084423102 4,200 0 0.00 182 1.11 0.0015
2013-11-14 2013-09-30 13F BERKLEY W R COM 084423102 4,200 0 0.00 180 4.65 0.0014
2013-08-16 2013-06-30 13F/A-1 BERKLEY W R COM 084423102 4,200 4,200 172 0.0013
2013-08-13 2013-06-30 13F BERKLEY W R COM 084423102 4,200 172
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.