Director Manfredi Lefebvre d'Ovidio Sells Business Combination Warrants in Arqit Quantum Inc.

This Form 4 filing reports that Manfredi Lefebvre d'Ovidio, a director of Arqit Quantum Inc. (ARQQ), sold Business Combination Warrants on April 15-16, 2026. The director sold 713 warrants at $3.00 per warrant on April 15, reducing his position to 29,151.84 equivalent ordinary shares, followed by selling 159 warrants at $3.10 per warrant on April 16, further reducing his position to 28,992.8 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 on a post-reverse stock split basis. The filing notes that as a foreign private issuer, the company's securities transactions are exempt from Sections 16(b) and 16(c) of the Exchange Act. The director beneficially owns these securities through Heritage Assets SCSp and currently holds 724,820 Business Combination Warrants, which if exercised would be equivalent to 28,992.8 ordinary shares.