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10/15/25 , 2:51 PM December 16 , 2021 - 20 - F : Annual and transition report of foreign private issuers pursuant to Section 13 or 15 ( d ) | Arqit Quan ... Table of Contents ㅁ ☑ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 20 - F REGISTRATION STATEMENT PURSUANT TO SECTION 12 ( b ) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended September 30 , 2021 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 001-40777 Arqit Quantum Inc. ( Exact name of registrant as specified in its charter ) Not applicable ( Translation of Registrant's name into English ) Cayman Islands ( Jurisdiction of incorporation or organization ) 1st Floor , 3 More London Riverside London SE1 2RE , United Kingdom Telephone : +44 203 91 70155 ( Address of principal executive office ) David Williams 1st Floor , 3 More London Riverside London SE1 2RE , United Kingdom Telephone : +44 203 91 70155 ( Name , Telephone , Email and / or Facsimile number and Address of Company Contact Person ) Title of each class Ordinary shares Warrants Securities registered or to be registered pursuant to Section 12 ( b ) of the Act . Trading Symbol ( s ) ARQQ ARQQW Name of each exchange on which registered The Nasdaq Stock Market LLC The Nasdaq Stock Market LLC https://ir.arqit.uk/sec-filings/all-sec-filings/content/0001104659-21-150276/arqq-20210930x20f.htm 1/232