Keystone Acquisition Corp. Announces Closing of $28,750,000 Million Initial Public Offering Including Exercise of Underwriters’ Over-Allotment Option

NEW YORK, NEW YORK, June 04, 2026 (GLOBE NEWSWIRE) -- Keystone Acquisition Corp. (Nasdaq: KEYYU) (the "Company”) today announced the closing of its initial public offering of 28,750,000 units, which includes 3,750,000 units issued pursuant to the exercise by the underwriters of their over-allotment option, at a public offering price of $10.00 per unit. Each unit consists of one Class A ordinary share and one-half of one redeemable warrant, with each whole warrant exercisable to purchase one Clas