0002070900 2025-04-01 2026-03-31 0002070900 QUMSU:UnitsEachConsistingOfOneOrdinaryShareAndOneRightMember 2025-04-01 2026-03-31 0002070900 QUMSU:OrdinarySharesParValue0.0001PerShareMember 2025-04-01 2026-03-31 0002070900 QUMSU:RightsEachRightEntitlingHolderToReceiveOneseventhOfOneOrdinaryShareMember 2025-04-01 2026-03-31 0002070900 2025-05-31 0002070900 2026-06-29 iso4217:USD shares true 2026 FY 0002070900 10-K/A true 2026-03-31 --03-31 false 001-42555 Quantumsphere Acquisition Corporation E9 00-0000000 1185 Avenue of the Americas Suite 304 New York NY 10036 (212) 612-1400 Units, each consisting of one ordinary share and one right QUMSU NASDAQ Ordinary shares, par value $0.0001 per share QUMS NASDAQ Rights, each right entitling the holder to receive one-seventh of one ordinary share QUMSR NASDAQ No No Yes Yes Non-accelerated Filer true true false false false true 84787200 10936105 This Amendment No. 1 to the Annual Report on Form 10-K (this “Amendment”) amends the Annual Report on Form 10-K of Quantumsphere Acquisition Corporation (the “Company”) for the fiscal year ended March 31, 2026, as originally filed with the Securities and Exchange Commission on June 15, 2026 (the “Original Filing”).   This Amendment is being filed solely to include the Company’s Clawback Policy as Exhibit 97.1 to the Original Filing.   No other changes have been made to the Original Filing. This Amendment does not reflect events occurring after the filing of the Original Filing and does not modify or update the disclosures contained in the Original Filing in any way other than as described above.