Quantumsphere Acquisition Corp (Nasdaq: QUMS) is a blank check company formed for the purpose of completing a business combination with one or more target businesses. The company filed an 8-K with the Securities and Exchange Commission on September 2, 2026, under accession number 0001829126-26-009623, indicating ongoing corporate activity. As a special purpose acquisition company, QUMS remains subject to the reporting requirements applicable to public shell companies while its search for a merger or acquisition target continues. Full sponsor details, IPO vintage, and sector focus for QUMS are available in the complete filing record on SpacDesk — sign up at spacdesk.com to access comprehensive SPAC data, filing timelines, and deal-tracking analytics.