W. R. Berkley Corporation
MX ˙ BMV ˙ US0844231029
SecurityMX:WRB / W. R. Berkley Corporation
InstitutionComerica Bank
Latest Disclosed Ownership74,911 shares
Latest Disclosed Value $ 5,252,764
Comerica Bank reports 6.52% decrease in ownership of WRB / W. R. Berkley Corporation

On January 29, 2026 - Comerica Bank filed a 13F-HR form disclosing ownership of 74,911 shares of W. R. Berkley Corporation (MX:WRB) valued at $5,252,764 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 80,133 shares of W. R. Berkley Corporation. This represents a change in shares of -6.52% 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)
2026-01-29 2025-12-31 13F BERKLEY W R COM 084423102 74,911 -5,222 -6.52 5,253 -14.45 0.0210
2025-11-14 2025-09-30 13F BERKLEY W R COM 084423102 80,133 4,116 5.41 6,140 9.94 0.0231
2025-08-14 2025-06-30 13F BERKLEY W R COM 084423102 76,017 -3,779 -4.74 5,585 -1.66 0.0217
2025-05-14 2025-03-31 13F BERKLEY W R COM 084423102 79,796 -15,827 -16.55 5,678 1.48 0.0238
2025-02-14 2024-12-31 13F/A-1 BERKLEY W R COM 084423102 95,623 16,535 20.91 5,596 24.72 0.0226
2025-02-14 2024-12-31 13F BERKLEY W R COM 084423102 95,623 16,535 5,596 0.0187
2024-11-14 2024-09-30 13F BERKLEY W R COM 084423102 79,088 26,001 48.98 4,487 7.55 0.0177
2024-08-15 2024-06-30 13F BERKLEY W R COMMON 084423102 53,087 -1,334 -2.45 4,172 -13.34 0.0174
2024-05-16 2024-03-31 13F BERKLEY W R COMMON 084423102 54,421 -717 -1.30 4,813 23.44 0.0207
2024-02-14 2023-12-31 13F BERKLEY W R COMMON 084423102 55,138 -10,420 -15.89 3,899 -6.32 0.0180
2023-11-21 2023-09-30 13F BERKLEY W R COMMON 084423102 65,558 -144,462 -68.78 4,162 0.0217
2023-08-22 2023-06-30 13F BERKLEY W R EQU 084423102 210,020 163,284 349.38 0 -100.00 0.0258
2023-01-26 2022-12-31 13F BERKLEY W R COM 084423102 46,736 10,778 29.97 3 -99.89 0.0261
2022-10-28 2022-09-30 13F BERKLEY W R COM 084423102 35,958 1,098 3.15 2,609 17.05 0.0220
2022-08-02 2022-06-30 13F BERKLEY W R COM 084423102 34,860 8,368 31.59 2,229 18.44 0.0183
2022-04-27 2022-03-31 13F BERKLEY W R COM 084423102 26,492 8,419 46.58 1,882 26.31 0.0137
2022-02-18 2021-12-31 13F BERKLEY W R COM 084423102 18,073 -615 -3.29 1,490 -3.06 0.0110
2021-11-22 2021-09-30 13F BERKLEY W R COM 084423102 18,688 -5,907 -24.02 1,537 -17.32 0.0093
2021-08-26 2021-06-30 13F BERKLEY W R COM 084423102 24,595 -933 -3.65 1,859 -10.50 0.0111
2021-04-28 2021-03-31 13F BERKLEY W R COM 084423102 25,528 -10,902 -29.93 2,077 -13.46 0.0124
2021-01-28 2020-12-31 13F BERKLEY W R COM 084423102 36,430 -2,181 -5.65 2,400 -5.40 0.0152
2020-10-30 2020-09-30 13F BERKLEY W R COM 084423102 38,611 340 0.89 2,537 3.72 0.0184
2020-07-31 2020-06-30 13F BERKLEY W R COM 084423102 38,271 -21,226 -35.68 2,446 -18.19 0.0188
2020-05-01 2020-03-31 13F BERKLEY W R COM 084423102 59,497 22,564 61.09 2,990 8.53 0.0274
2020-02-07 2019-12-31 13F BERKLEY W R COM 084423102 36,933 -55,923 -60.23 2,755 -58.02 0.0209
2019-10-31 2019-09-30 13F BERKLEY W R COM 084423102 92,856 -2,973 -3.10 6,563 0.98 0.0519
2019-08-02 2019-06-30 13F BERKLEY W R COM 084423102 95,829 33,571 53.92 6,499 83.54 0.0520
2019-05-02 2019-03-31 13F BERKLEY W R COM 084423102 62,258 -1,025 -1.62 3,541 -25.04 0.0287
2019-02-06 2018-12-31 13F BERKLEY W R COM 084423102 63,283 1,173 1.89 4,724 5.35 0.0401
2018-11-01 2018-09-30 13F BERKLEY W R COM 084423102 62,110 -11,730 -15.89 4,484 -17.71 0.0362
2018-08-01 2018-06-30 13F BERKLEY W R COM 084423102 73,840 -2,276 -2.99 5,449 -3.47 0.0381
2018-05-01 2018-03-31 13F BERKLEY W R COM 084423102 76,116 -380 -0.50 5,645 2.79 0.0403
2018-02-02 2017-12-31 13F BERKLEY W R COM 084423102 76,496 942 1.25 5,492 5.74 0.0366
2017-11-06 2017-09-30 13F BERKLEY W R COM 084423102 75,554 -967 -1.26 5,194 -4.75 0.0376
2017-08-03 2017-06-30 13F BERKLEY W R COM 084423102 76,521 546 0.72 5,453 4.66 0.0408
2017-05-03 2017-03-31 13F BERKLEY W R COM 084423102 75,975 3,149 4.32 5,210 6.59 0.0395
2017-02-08 2016-12-31 13F BERKLEY W R COM 084423102 72,826 4,546 6.66 4,888 21.96 0.0387
2016-08-11 2016-06-30 13F BERKLEY W R COM 084423102 68,280 1,871 2.82 4,008 7.02 0.0346
2016-05-11 2016-03-31 13F BERKLEY W R COM 084423102 66,409 -2,271 -3.31 3,745 4.84 0.0334
2016-02-05 2015-12-31 13F BERKLEY W R COM 084423102 68,680 -1 -0.00 3,572 -4.34 0.0351
2015-11-12 2015-09-30 13F BERKLEY W R COM 084423102 68,681 -69,625 -50.34 3,734 -48.01 0.0354
2015-08-13 2015-06-30 13F BERKLEY W R COM 084423102 138,306 68,446 97.98 7,182 103.51 0.0308
2015-05-15 2015-03-31 13F BERKLEY W R COM 084423102 69,860 -71,658 -50.64 3,529 -51.35 0.0299
2015-02-13 2014-12-31 13F BERKLEY W R COM 084423102 141,518 67,997 92.49 7,254 106.43 0.0314
2014-10-21 2014-09-30 13F BERKLEY W R COM 084423102 73,521 247 0.34 3,514 3.57 0.0310
2014-08-12 2014-06-30 13F BERKLEY W R COM 084423102 73,274 -8,378 -10.26 3,393 -0.15 0.0289
2014-05-15 2014-03-31 13F BERKLEY W R COM 084423102 81,652 -2,492 -2.96 3,398 -6.93 0.0260
2014-02-11 2013-12-31 13F BERKLEY W R COM 084423102 84,144 -3,911 -4.44 3,651 -3.26 0.0283
2013-11-12 2013-09-30 13F BERKLEY W R COM 084423102 88,055 -1,123 -1.26 3,774 3.57 0.0263
2013-08-13 2013-06-30 13F/A-1 BERKLEY W R COM 084423102 89,178 89,178 3,644 0.0297
2013-08-08 2013-06-30 13F BERKLEY W R COM 084423102 439,250 17,948
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.