Keystone Acquisition Corp. 8-K

What Happened
Keystone Acquisition Corp. announced it consummated its initial public offering on June 4, 2026, selling 28,750,000 units at $10.00 per unit (including a full 3,750,000-unit over-allotment). Each unit consists of one Class A ordinary share and one-half of a warrant (each whole warrant exercisable for one share at $11.50). Simultaneously the company completed a private placement of 8,468,750 warrants at $1.00 each. An audited balance sheet as of June 4, 2026 reflecting these transactions was filed as Exhibit 99.1.

Key Details

• IPO: 28,750,000 units sold at $10.00 per unit, generating $287,500,000 gross proceeds.
• Over-allotment: Underwriters exercised the full 3,750,000-unit option.
• Private Placement: 8,468,750 warrants sold for $1.00 each, raising $8,468,750 (Sponsor bought 5,593,750; representatives bought 2,875,000).
• Trust account: $288,218,750 (which includes up to $11,500,000 of deferred underwriter commission) was placed in a U.S.-based trust account with Efficiency INC. as trustee.

Why It Matters
For investors, this filing confirms Keystone is a funded SPAC with roughly $288.2 million held in trust to pursue a business combination. The number of units, warrant terms (exercise price $11.50), and seller identities (Sponsor and underwriter reps) affect potential future dilution and capital structure after a merger. The audited balance sheet and trust funding are material operational facts that validate the company’s cash position and readiness to move forward with a target acquisition.