On June 18, 2026, Keystone Acquisition Corp. announced that holders of its units (KEYYU) may elect to separately trade the constituent Class A ordinary shares (KEYY) and warrants (KEYYW) starting on or about June 22, 2026. Each unit consists of one Class A ordinary share and one-half of one redeemable warrant. Only whole warrants will trade, and no fractional warrants will be issued upon separation. The company is a special purpose acquisition company (SPAC) designed to effect a merger or acquisition.

On June 4, 2026, Keystone Acquisition Corp. consummated its initial public offering of 28,750,000 units at $10.00 per unit, generating $287,500,000 in gross proceeds. Each unit consists of one Class A ordinary share and one-half of one redeemable warrant exercisable at $11.50 per share. Simultaneously, the company completed a private placement of 8,468,750 warrants to its sponsor and underwriters at $1.00 per warrant, raising $8,468,750. Total proceeds of $288,218,750 were placed in a U.S.-based trust account. The company is a special purpose acquisition company (SPAC) formed to effect a business combination.

Keystone Acquisition Corp. announced the consummation of its initial public offering (IPO) of 28,750,000 units at $10.00 per unit, generating gross proceeds of $287,500,000. The company also completed a private sale of 8,468,750 warrants to its Sponsor and the Representatives at $1.00 per warrant, generating $8,468,750 in gross proceeds.