Report of Foreign Private Issuer - ARQIT QUANTUM INC.

On May 1, 2026, ARQIT QUANTUM INC. appointed Cristina Levis as a Class I independent director and a member of the Company's Audit Committee. Ms. Levis has an extensive background in finance, having worked in financial services firms in Switzerland and Italy, and held significant roles at Silversea Cruises and Abercrombie & Kent Travel Group, where she became CEO in June 2022. This appointment is reported on Form 6-K, which is an informational filing. The filing also notes that the information provided is not deemed "filed" for certain sections of the Securities Exchange Act of 1934, but it will be incorporated by reference into the company's existing registration statements on Form S-8 and Form F-3.