Arqit Quantum Inc. - Ownership Filing

This filing details the ownership of Arqit Quantum Inc. (ARQQ) securities by Carlo Calabria, who is also a director. The filing, dated March 18, 2026, indicates direct ownership of 108,173 ordinary shares. It also outlines holdings in various derivative instruments, including ordinary share purchase warrants with exercise prices of $2.50 and $19.50, and several series of Restricted Stock Units (RSUs). The RSUs have varying vesting schedules extending into October 2028. Notably, as a foreign private issuer, Arqit Quantum Inc. is exempt from certain reporting requirements under the Securities Exchange Act of 1934.