Company: IMCR
Filing Date: 2025-03-17
Form Type: 424B7
Source: 0001140361-25-008917
Chunk: 127

Company: Immunocore Holdings plc
Filing Date: 2025-03-17
Form: 424B7
Chunk 127
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 had been originally brought in England unless the subject of the counterclaim was in issue and denied in the U.S. proceedings.

<div align='center'>S-71</div>

#### TABLE OF CONTENTS

### WHERE YOU CAN FIND MORE INFORMATION
This prospectus supplement and the accompanying base prospectus are part of a registration statement on Form S-3 that we filed with the SEC and does not contain all of the information in the registration statement. The full registration statement may be obtained from the SEC or us, as provided below. Forms of the documents establishing the terms of the offered securities are or may be filed as exhibits to the registration statement of which this prospectus supplement forms a part. Statements in this prospectus supplement or the accompanying base prospectus about these documents are summaries and each statement is qualified in all respects by reference to the document to which it refers. You should refer to the actual documents for a more complete description of the relevant matters. You may inspect a copy of the registration statement through the SEC’s website, as provided above.

We also maintain a website at www.immunocore.com through which you can access our SEC filings. Information contained in, or that can be accessed through, our website is not a part of, and shall not be incorporated by reference into, this prospectus supplement. We have included our website address in this prospectus supplement solely as an inactive textual reference.

<div align='center'>S-72</div>

TABLE OF CONTENTS

INCORPORATION OF CERTAIN INFORMATION BY REFERENCE The SEC allows us to “incorporate by reference” information from other documents that we file with it, which means that we can disclose important information to you by referring you to those documents rather than by including them in this prospectus supplement. The information incorporated by reference is considered to be part of this prospectus supplement. Information in this prospectus supplement supersedes information incorporated by reference that we filed with the SEC prior to the date of this prospectus supplement, while information that we file later with the SEC will automatically update and supersede the information in this prospectus supplement. We incorporate by reference into this prospectus supplement and the registration statement of which this prospectus supplement is a part the information or documents listed below (other than information in such filings that has been furnished to, but not filed with, the SEC):

| • | the description of our ADSs representing our ordinary shares contained in our Registration Statement onForm 8-A, as filed with the SEC under Section 12(b) of the