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UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 20 - F ( Mark One ) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12 ( b ) OR ( g ) 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 December 31 , 2020 ☐ 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 Date of event requiring this shell company report Commission File Number 001-39992 Immunocore Holdings plc ( Exact name of Registrant as specified in its charter and translation of Registrant's name into English ) Title of each class England and Wales ( Jurisdiction of incorporation or organization ) 92 Park Drive Milton Park Abingdon , Oxfordshire OX14 4RY ( Address of principal executive offices ) Bahija Jallal , Ph.D. Chief Executive Officer 92 Park Drive Milton Park Abingdon , Oxfordshire OX14 4RY United Kingdom Tel : +44 1235 438600 ( Name , Telephone , Email and / or Facsimile number and Address of Company Contact Person ) Securities registered or to be registered pursuant to Section 12 ( b ) of the Act . American Depositary Shares , each representing one ordinary share , nominal value £ 0.002 per share Ordinary share , nominal value £ 0.002 per share * Trading Symbol ( s ) IMCR * Not for trading , but only in connection with the registration of the American Depositary Shares . Name of each exchange on which registered The Nasdaq Stock Market LLC The Nasdaq Stock Market LLC * Securities registered or to be registered pursuant to Section 12 ( g ) of the Act . None Securities for which there is a reporting obligation pursuant to Section 15 ( d ) of the Act . None Indicate the number of outstanding shares of each of the issuer's classes of capital or common stock as of the close of the period covered by the annual report : Ordinary shares : 31,782,885 shares outstanding as of December 31 , 2020 , after giving effect to the registrant's corporate reorganization including ( i ) the exchange of shares of Immunocore Limited for shares of Immunocore Holdings Limited on a 1 for 100 basis , ( ii ) the reduction of share capital of Immunocore Limited , ( iii ) the re - registration and change of name of Immunocore Holdings Limited to Immunocore Holdings plc , and ( iv ) the reorganization of the share capital of Immunocore Holdings plc , resulting in a consolidation with the effect of a 20 to 1 reverse stock split on the registrant's ordinary shares and non - voting ordinary shares , all of which took place in connection with the registrant's initial public offering which closed on February 9 , 2021 . Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . ☐ Yes > No If this report is an annual or transition report , indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934. Yes No Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . ☑Yes No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( $ 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . ☑Yes No Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , or an emerging growth company . See definition of " large accelerated filer , " " accelerated filer , ” and “ emerging growth company ” in Rule 12b - 2 of the Exchange Act . Large accelerated filer ☐ Accelerated filer Non - accelerated filer ☑ Emerging growth company ☑ If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards † provided pursuant to Section 13 ( a ) of the Exchange Act . ☐ The term " new or revised financial accounting standard ” refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5 , 2012 . † Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . ☐ Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing :