Arqit Quantum CEO Andrew Leaver's Stock Transactions - July 2026

This Form 4 filing discloses transactions by Arqit Quantum Inc. CEO Andrew Leaver involving company securities in July 2026. On July 1, 2026, Leaver received 15,625 ordinary shares through the vesting of restricted stock units (RSUs) at $0 per share, increasing his direct holdings to 61,376 shares. The following day on July 2, 2026, he sold 9,893 ordinary shares at $25.2026 per share, reducing his direct holdings to 51,483 shares. The filing notes that as a foreign private issuer, Arqit Quantum is exempt from Sections 16(b) and 16(c) of the Securities Exchange Act. The RSUs vest quarterly through October 2029 and convert to ordinary shares on a one-for-one basis. These transactions represent routine executive compensation-related activity and stock sales.