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. On April 1, 2026, Garth received 1,051 ordinary shares through the vesting of Restricted Stock Units (RSUs) across four different grant tranches with varying vesting schedules extending through 2028. The RSUs converted to ordinary shares on a one-for-one basis. The following day, on April 2, 2026, Garth sold 512 ordinary shares at $13.2463 per share, reducing his total holdings to 28,800 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. Garth remains a director of the company following these transactions.