X0508 4 2024-01-03 0 0001671927 Immunocore Holdings plc IMCR 0001969525 St Leger Tina Amber C/O IMMUNOCORE HOLDINGS PLC 92 PARK DRIVE, MILTON PARK ABINGDON, OXFORDSHIRE X0 OX14 4RY UNITED KINGDOM 0 1 0 0 Chief HR Officer 1 Ordinary Shares 2024-01-03 4 M 0 4375 29.87 A 4375 D Ordinary Shares 2024-01-03 4 S 0 4068 69.85 D 307 D Ordinary Shares 2024-01-03 4 S 0 307 70.46 D 0 D Employee Share Option (Right to Buy) 29.87 2024-01-03 4 M 0 4375 0.00 D 2032-03-31 Ordinary Shares 4375 39375 D This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 23, 2023. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.28 to $70.01 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.40 to $70.66 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. 25% of the shares subject to the option award vested on April 1, 2023, and 6.25% of the shares subject to the option award vested or shall vest in quarterly installments thereafter, subject to the Reporting Person's continuous service through each such vesting date. /s/ Tina St Leger 2024-01-05