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Keystone Acquisition Corp., a Cayman Islands SPAC, completed its IPO on June 4, 2026, selling 28,750,000 units at $10.00 each and raising $287.5 million. Together with a concurrent private placement, $288,218,750 was deposited into a U.S. trust account invested in Treasuries and money market funds.
As of June 30, 2026, total assets were $290.3 million, including $288.97 million in the trust and $1.07 million in operating cash, against $11.95 million of liabilities plus $288.97 million of Class A shares classified as redeemable. The company reported net income of $74,031 for the quarter and $36,791 for the six months, driven by $754,831 of interest on trust investments and $12,500 of referral income, offset by operating and compensation expenses.
Management discloses that projected liquidity raises substantial doubt about the ability to continue as a going concern if no business combination is completed by March 4, 2028, the mandatory liquidation deadline. No business combination has been executed yet; activities remain focused on target identification.
AQR Capital Management, LLC, AQR Capital Management Holdings, LLC, and AQR Arbitrage, LLC report a passive ownership stake in Keystone Acquisition Corp. They collectively beneficially own 1,723,275 units, representing 1,723,275 Class A ordinary shares.
This position equals 5.99% of the outstanding Class A ordinary shares. The AQR entities report no sole voting or dispositive power over these shares, but shared voting and shared dispositive power over all 1,723,275 shares. AQR Capital Management, LLC is a wholly owned subsidiary of AQR Capital Management Holdings, LLC, and AQR Arbitrage, LLC is deemed controlled by AQR Capital Management, LLC.
Magnetar Financial LLC and related entities report a significant ownership position in Keystone Acquisition Corp. As of June 30, 2026, Magnetar Financial, Magnetar Capital Partners LP, Supernova Management LLC, and David J. Snyderman are each deemed to beneficially own 2,000,000 Class A ordinary shares of Keystone Acquisition Corp, representing approximately 6.96% of the company’s outstanding shares.
The 2,000,000 shares are held across several Magnetar-managed funds, and the reporting persons have shared voting and dispositive power over all of these shares, with no sole voting or dispositive power. The ownership percentage is based on 28,750,000 shares outstanding, as referenced from a Form 8-K filed by the issuer.