Arqit Quantum Director Manfredi Sells Business Combination Warrants

This Form 4 filing reports that Manfredi Lefebvre d'Ovidio, a director of Arqit Quantum Inc. (ARQQ), sold Business Combination Warrants on June 5 and June 8, 2026. On June 5, 2026, he sold 156 warrants at $1.40 per warrant, reducing his position to 20,989.36 equivalent ordinary shares. On June 8, 2026, he sold an additional 18 warrants at $1.50 per warrant, further reducing his position to 20,971.32 equivalent ordinary shares. The warrants have an exercise price of $11.50 and can be exercised to purchase 0.04 of an ARQQ ordinary share each, with 25 warrants required to receive one whole ordinary share. Due to Arqit Quantum's status as a foreign private issuer, these transactions are exempt from certain short-swing profit recovery provisions under Sections 16(b) and 16(c) of the Securities Exchange Act. The warrants expire on September 3, 2026, and the director holds them through Heritage Assets SCSp.