Keystone Acquisition Corp. Announces the Separate Trading of its Class A Ordinary Shares and Warrants, Commencing on or about June 22, 2026.

New York, New York, June 18, 2026 (GLOBE NEWSWIRE) -- Keystone Acquisition Corp. (Nasdaq: KEYYU) (the “Company”) announced that holders of the units sold in the Company’s initial public offering of 28,750,000 units, which includes 3,750,000 units issued pursuant to the exercise by the underwriters of their overallotment option in full, completed on June 4, 2026 (the “Offering”), may elect to separately trade the Class A ordinary shares and warrants included in the units commencing on or about June 22, 2026. Any units not separated will continue to trade on The Nasdaq Global Market under the symbol “KEYYU,” and each of the Class A ordinary shares and warrants will separately trade on The Nasdaq Global Market under the symbols “KEYY” and “KEYYW,” respectively. No fractional warrants will be issued upon separation of the units and only whole warrants will trade. Holders of units will need to have their brokers contact Efficiency INC., the Company’s transfer agent, in order to separate the units into Class A ordinary shares and warrants.