Oncimmune Holdings plc

("Oncimmune" or the "Company")

Appointment of Nominated Adviser and Joint Broker

Oncimmune Holdings plc (AIM: ONC.L), a leading autoantibody profiling company to the pharmaceutical and biotechnology industry enabling precision medicine, announces the appointment of Cavendish Capital Markets Limited as Nominated Adviser and Joint Broker with immediate effect. Zeus Capital Limited will remain as the Company's Joint Broker.

For further information please contact:

Notes to Editors

About Oncimmune

Oncimmune is a precision medicine company, specialising in analysing immune interactions through the autoantibody profile. Taking a platform approach to generating insights, Oncimmune is partnering with global pharmaceutical and biotech companies, as well as contract research organisations (CROs) to discover novel biomarkers for the development of more targeted and effective therapies across many immune-mediated diseases. Our mission at Oncimmune is to enable precision medicine. We help our partners to discover novel biomarkers, drug targets and predict treatment efficacy through the application of our platform. We are able to do this by deploying our world class scientific team and our cutting-edge technology platform, built on years of experience in the field. Our aim is to make this an essential tool in drug discovery and development.

Oncimmune is headquartered in the UK, with its discovery and development facility based in Dortmund, Germany and a business development team based in the US and Europe.

For more information, visit www.oncimmune.com

Existing Board - AIM Rule 17 Disclosure

The Company announces the following additional director disclosures pursuant to AIM Rule 17 and Schedule Two paragraph (g) of the AIM Rules for Companies.

Alistair Macdonald - Chairman

Alistair Macdonald was a former director of Taiwan Syneos Health Company Limited and Inc Research SA within 5 years of the date of the Company's announcement entitled "Board changes and Trading Update" dated 8 July 2022.