Mitsui Sumitomo Insurance Co., Ltd. 13D and 13G filings for W. R. Berkley Corporation:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-06-04 8:36 pm Unchanged | 2026-06-03 | 13D | BERKLEY CORP WRB | Mitsui Sumitomo Insurance Co., Ltd. | 58,780,450 15.800% | 0 (Unchanged) | Filing |
| 2026-03-05 07:00 am Purchase | 2026-03-04 | 13D | BERKLEY CORP WRB | Mitsui Sumitomo Insurance Co., Ltd. | 58,780,450 15.700% | 2,321,794 (+4.11%) | Filing |
| 2026-02-06 8:45 pm Purchase | 2026-02-05 | 13D | BERKLEY CORP WRB | Mitsui Sumitomo Insurance Co., Ltd. | 56,458,656 14.900% | 3,732,152 (+7.08%) | Filing |
| 2026-01-14 9:51 pm Purchase | 2026-01-13 | 13D | BERKLEY CORP WRB | Mitsui Sumitomo Insurance Co., Ltd. | 52,726,504 13.900% | 4,124,916 (+8.49%) | Filing |
| 2025-12-11 5:03 pm Purchase | 2025-12-04 | 13D | BERKLEY CORP WRB | Mitsui Sumitomo Insurance Co., Ltd. | 48,601,588 12.800% | 48,601,588 (New Position) | Filing |