W. R. Berkley Corporation 13D and 13G filings for Quantumsphere Acquisition Corp. Ordinary Shares:
- 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 |
| 2026-08-06 4:59 pm Purchase | 2026-06-30 | 13G | QUANTUMSPHERE ACQUISITION CORP QUMS | W. R. Berkley Corporation WRB | 881,402 7.700% | 881,402 (New Position) | Filing |