Insider Transactions of Arqit Quantum Inc. by Chief Operating Officer

On July 1, 2026, Arqit Quantum Inc. Chief Operating Officer, Wilder Ben Simon, acquired 833 ordinary shares through the conversion of Restricted Share Units (RSUs) and an additional 500 ordinary shares through the conversion of RSUs. These RSUs vest quarterly through October 1, 2028. On July 2, 2026, Mr. Simon disposed of 769 ordinary shares at a price of $25.2026 per share. Following these transactions, Mr. Simon holds 3582.47 ordinary shares. All transactions were made under an exemption from Section 16(b) of the Securities Exchange Act of 1934 due to the issuer's status as a foreign private issuer.