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MergersSEC EDGAR SCHEDULE 13GFiled 34 h ago

Quantumsphere Acquisition Corp: BERKLEY W R CORP amends Schedule 13G stake filing

Open the sourceReported by SEC EDGAR SCHEDULE 13G, sec.gov, 9 November 2026, by SEC EDGAR SCHEDULE 13G

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W.R. Berkley Corp. filed an amended Schedule 13G with the SEC (accession 0001628280-26-072416) updating its ownership stake in Quantumsphere Acquisition Corp. The amendment, disclosed in the filing, revises the insurer's previously reported position in the blank-check company. Specific share counts and percentage figures were not detailed in the headline disclosure. The filing matters because 13G amendments signal changes in passive or institutional holdings that can hint at shifting investor sentiment toward the SPAC. Investors will watch for the full filing details on share totals and any further stake adjustments ahead of Quantumsphere's next corporate action.

Muhabbit's AI wrote this summary in its own words from SEC EDGAR SCHEDULE 13G's report. It can get details wrong, so check the source.

Named in this story

BERKLEY W R CORP, Quantumsphere Acquisition Corp