Form 4 Filing for Arqit Quantum Inc.

This filing details transactions by Ben Simon, Chief Operating Officer of Arqit Quantum Inc., on October 5, 2026. Simon acquired 277 ordinary shares through the conversion of Restricted Share Units (RSUs) and an additional 166 ordinary shares also from RSUs. He then disposed of 233 ordinary shares at a price of $23.7847 per share. The transactions involved RSUs which convert to ordinary shares on a one-for-one basis and vest quarterly through October 1, 2028. Following these transactions, Simon