Arqit Quantum Director Ritchie Garth's RSU Vesting and Stock Sale

This Form 4 filing reports transactions by Arqit Quantum Inc. (ARQQ) director Ritchie Garth involving restricted share units (RSUs) and ordinary shares. On July 1, 2026, multiple RSU grants vested and converted into ordinary shares, resulting in the acquisition of 799 ordinary shares (50 + 250 + 250 + 249) at $0 per share. The RSUs had different vesting schedules, with some vesting quarterly through 2027 and others through 2028. Following these acquisitions, on July 2, 2026, Garth sold 439 ordinary shares at $25.2026 per share. After all transactions, Garth's total ownership stands at 104,609 ordinary shares. The filing notes that as a foreign private issuer, Arqit Quantum's transactions are exempt from Sections 16(b) and 16(c) of the Securities Exchange Act.