WR伯克利公司
MX ˙ BMV ˙ US0844231029
SecurityMX:WRB / W. R. Berkley Corporation
InstitutionCoastline Trust Co
Latest Disclosed Ownership622 shares
Latest Disclosed Value $ 41,226
Coastline Trust Co ownership in WRB / W. R. Berkley Corporation

On April 3, 2026 - Coastline Trust Co filed a 13F-HR form disclosing ownership of 622 shares of W. R. Berkley Corporation (MX:WRB) valued at $41,226 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 5, 2026 disclosing 622 shares of W. R. Berkley Corporation. This represents a change in shares of 0.00% 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)
2026-04-03 2026-03-31 13F BERKLEY W R COM 084423102 622 0 0.00 41 -4.65 0.0039
2026-01-05 2025-12-31 13F BERKLEY W R COM 084423102 622 0 0.00 44 -8.51 0.0041
2025-10-21 2025-09-30 13F BERKLEY W R COM 084423102 622 0 0.00 48 4.44 0.0051
2025-07-17 2025-06-30 13F BERKLEY W R COM 084423102 622 0 0.00 46 2.27 0.0052
2025-04-28 2025-03-31 13F BERKLEY W R COM 084423102 622 -199 -24.24 44 -8.33 0.0055
2025-02-13 2024-12-31 13F BERKLEY COM 084423102 821 0 0.00 48 4.35 0.0056
2024-11-06 2024-09-30 13F BERKLEY COM 084423102 821 821 47 0.0055
2024-01-23 2023-12-31 13F WR BERKLEY COMMON STOCK 084423102 0 -3,748 -100.00 0 -100.00
2023-10-18 2023-09-30 13F WR BERKLEY COMMON STOCK 084423102 3,748 -515 -12.08 238 -6.32 0.0351
2023-08-07 2023-06-30 13F WR BERKLEY COMMON STOCK 084423102 4,263 -2,472 -36.70 254 -39.62 0.0356
2023-05-31 2023-03-31 13F/A-1 WR BERKLEY COMMON STOCK 084423102 6,735 0 0.00 419 -14.14 0.0621
2023-04-12 2023-03-31 13F WR BERKLEY COMMON STOCK 084423102 6,735 0 489 0.0728
2023-02-09 2022-12-31 13F WR BERKLEY COMMON STOCK 084423102 6,735 -270 -3.85 489 7.73 0.0728
2022-11-03 2022-09-30 13F WR BERKLEY COMMON STOCK 084423102 7,005 0 0.00 453 -5.23 0.0725
2022-07-22 2022-06-30 13F WR BERKLEY COMMON STOCK 084423102 7,005 -86 -1.21 478 1.27 0.0707
2022-05-04 2022-03-31 13F WR BERKLEY COMMON STOCK 084423102 7,091 2,249 46.45 472 18.30 0.0573
2022-02-10 2021-12-31 13F WR BERKLEY COMMON STOCK 084423102 4,842 -50 -1.02 399 11.45 0.0455
2021-11-09 2021-09-30 13F WR BERKLEY COMMON STOCK 084423102 4,892 -60 -1.21 358 -2.72 0.0445
2021-08-10 2021-06-30 13F WR BERKLEY COMMON STOCK 084423102 4,952 -10 -0.20 368 -1.60 0.0455
2021-05-10 2021-03-31 13F WR BERKLEY COMMON STOCK 084423102 4,962 15 0.30 374 14.02 0.0482
2021-02-12 2020-12-31 13F WR BERKLEY COMMON STOCK 084423102 4,947 15 0.30 328 8.61 0.0437
2020-10-15 2020-09-30 13F WR BERKLEY COMMON STOCK 084423102 4,932 -490 -9.04 302 -2.89 0.0454
2020-08-07 2020-06-30 13F WR BERKLEY COMMON STOCK 084423102 5,422 -45 -0.82 311 8.74 0.0491
2020-06-10 2020-03-31 13F WR BERKLEY COMMON STOCK 084423102 5,467 0 0.00 286 -24.34 0.0516
2020-01-15 2019-12-31 13F WR BERKLEY COMMON STOCK 084423102 5,467 -70 -1.26 378 -5.50 0.0524
2019-10-18 2019-09-30 13F WR BERKLEY COMMON STOCK 084423102 5,537 -290 -4.98 400 4.17 0.0589
2019-07-18 2019-06-30 13F WR BERKLEY COMMON STOCK 084423102 5,827 1,582 37.27 384 6.67 0.0558
2019-04-25 2019-03-31 13F WR BERKLEY COMMON STOCK 084423102 4,245 -230 -5.14 360 9.09 0.0538
2019-01-15 2018-12-31 13F WR BERKLEY COMMON STOCK 084423102 4,475 -70 -1.54 330 -9.09 0.0569
2018-10-17 2018-09-30 13F WR BERKLEY COMMON STOCK 084423102 4,545 0 0.00 363 10.33 0.0520
2018-07-27 2018-06-30 13F WR BERKLEY COMMON STOCK 084423102 4,545 0 0.00 329 -0.30 0.0496
2018-04-16 2018-03-31 13F WR BERKLEY COMMON STOCK 084423102 4,545 175 4.00 330 5.43 0.0507
2018-01-17 2017-12-31 13F WR BERKLEY COMMON STOCK 084423102 4,370 0 0.00 313 7.19 0.0471
2017-11-17 2017-09-30 13F WR BERKLEY COMMON STOCK 084423102 4,370 0 0.00 292 -3.31 0.0509
2017-08-10 2017-06-30 13F WR BERKLEY COMMON STOCK 084423102 4,370 -120 -2.67 302 -4.73 0.0547
2017-04-19 2017-03-31 13F WR BERKLEY COMMON STOCK 084423102 4,490 -250 -5.27 317 0.32 0.0592
2017-01-17 2016-12-31 13F WR BERKLEY COMMON STOCK 084423102 4,740 -155 -3.17 316 11.66 0.0621
2016-10-20 2016-09-30 13F WR BERKLEY COMMON STOCK 084423102 4,895 -80 -1.61 283 -5.03 0.0554
2016-07-18 2016-06-30 13F WR BERKLEY COMMON STOCK 084423102 4,975 -100 -1.97 298 4.56 0.0602
2016-04-15 2016-03-31 13F WR BERKLEY COMMON STOCK 084423102 5,075 35 0.69 285 3.26 0.0608
2016-01-15 2015-12-31 13F WR BERKLEY COMMON STOCK 084423102 5,040 430 9.33 276 9.96 0.0606
2015-10-30 2015-09-30 13F WR BERKLEY COMMON STOCK 084423102 4,610 -110 -2.33 251 2.45 0.0571
2015-07-22 2015-06-30 13F WR BERKLEY COMMON STOCK 084423102 4,720 0 0.00 245 2.51 0.0512
2015-04-17 2015-03-31 13F WR BERKLEY COMMON STOCK 084423102 4,720 160 3.51 239 2.14 0.0491
2015-01-21 2014-12-31 13F WR BERKLEY COMMON STOCK 084423102 4,560 4,560 234 0.0489
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.