Form 4 Filing for Arqit Quantum Inc.

This filing details transactions made by Ritchie Garth, a director at Arqit Quantum Inc., on October 2, 2026. Garth acquired a total of 233 ordinary shares through the conversion of Restricted Share Units (RSUs), with the RSUs vesting quarterly as per footnotes F2, F3, and F4. The acquisition of these shares was exempt from Section 16(b) and 16(c) of the Act due to the issuer's status as a foreign private issuer. Additionally, Garth disposed of a total of 121 ordinary shares in separate transactions. These dispositions occurred at a price of $24.4743 per share. The filing indicates that these transactions are reported on Form 4.