Keystone Acquisition Corp. closes $287.5M IPO and $8.5M private placement

Keystone Acquisition Corp.

IPO of 28,750,000 units at $10.00/unit raised $287.5M gross.
Private placement of 8,468,750 warrants at $1.00 each raised $8.47M.
$288.2M placed in trust account at $10.025 per unit.
Transaction costs totaled $17.87M including $11.5M deferred underwriting.
As of June 4, 2026, working capital outside trust was $1.26M.

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