Keystone Acquisition Corp. (KEYYU) has successfully completed its initial public offering (IPO), raising $287.5 million through the sale of 28.75 million units priced at $10.025 each. This amount includes 3.75 million units from an over-allotment option exercised by underwriters. Each unit consists of one Class A ordinary share and half of a redeemable warrant, with the warrants being exercisable at $11.50 per share. The units began trading on Nasdaq on June 3, 2026. In conjunction with the IPO, Keystone also executed a private placement of 8,468,750 warrants at $1.00 each, generating an additional $8.47 million in gross proceeds. The company has placed approximately $288.22 million from these offerings into trust, reflecting the proceeds from the public offering. Keystone Acquisition aims to merge with businesses in sectors related to U.S. industrial development, focusing on areas such as energy transition, shipbuilding, semiconductors, and digital infrastructure. Cohen & Company Capital Markets served as the lead book-running manager for this offering, with Clear Street LLC as the co-manager. Once separate trading begins, the Class A ordinary shares and warrants are expected to trade under the symbols "KEYY" and "KEYYW" respectively.