Quantumsphere Acquisition Corp.

Item 8.01. Other Events. On August 7, 2025, Quantumsphere Acquisition Corporation (the “Company”) consummated its initial public offering (the “IPO”) of 7,200,000 units (the “Units”). In connection with the closing of the IPO, the underwriter fully exercised its over-allotment option to purchase 1,080,000 additional Units for an aggregate of 8,280,000 Units sold. Each Unit consists of one ordinary share, par value $0.0001 per share, of the Company (the “Ordinary Shares”) and one right to receive one-seventh (1/7) of one Ordinary Share upon the consummation of the Company’s initial business combination the (“Rights”). The Units were sold at an offering price of $10.00 per Unit, generating total gross proceeds of $82,800,000. Simultaneously with the closing of the IPO, the Company consummated a private placement (the “Private Placement”) in which Whiteowl Holdings LLC (the “Sponsor”), purchased 228,650 units (the “Private Placement Units”) at a price of $10.00 per Private Placement Unit, generating total gross proceeds of $2,286,500. A total of $82,800,000 of the net proceeds from the IPO and the sale of the Private Placement Units were placed in a trust account established for the benefit of the Company’s public shareholders. An audited balance sheet as of August 7, 2025, reflecting receipt of the proceeds upon consummation of the IPO and the Private Placement has been issued by the Company and is included as Exhibit 99.1 to this Current Report on Form 8-K.