Dr Frank Mathias to join Oxford Biomedica as new CEO on 27 March 2023 Dr Mathias brings a wealth of experience in innovation, contract development and manufacturing to Oxford BiomedicaStuart Henderson to take on newly created position of Vice Chair and Dame Kay Davies to become Senior Independent Director Oxford, UK – 20 February 2023: Oxford, UK – Oxford Biomedica (LSE:OXB), a leading gene and cell therapy group, today announces that Dr Frank Mathias will officially join Oxford Biomedica as Chief Executive Officer (CEO) and Board member on Monday, 27th March 2023. His appointment was previously announced on 22nd November 2022. Dr Frank Mathias joins Oxford Biomedica from Rentschler Biopharma SE (“Rentschler”) where he has been CEO since 2016. He successfully transformed Rentschler into a leading global, full-service CDMO and transformed the financials of the business including a three-fold increase in revenue, while also improving efficiencies and profitability at an even faster rate. Dr Roch Doliveux, Chair and Interim CEO of Oxford Biomedica, said: “We are extremely excited about the imminent arrival of Frank as our new CEO. Frank brings a wealth of experience in innovation, contract development and manufacturing to Oxford Biomedica and I feel, with Frank’s new leadership, we are extremely well-positioned to deliver the growth and full potential of the company given our leading technology. As a viral vector leader, Oxford Biomedica is poised to build its position as a world-class, innovation-led CDMO delivering life-changing therapies to patients.” Dr Frank Mathias, incoming Chief Executive Officer, said: “I look forward to joining Oxford Biomedica and leading the Company in its mission to deliver innovative services to biopharma customers, enabling them to discover and deliver therapies that transform patients’ lives. Oxford Biomedica has a clear vision for the future, and I believe it has great potential to become the leader in the viral vector CDMO market. I firmly believe in the Company’s strategy for growth and am excited to start working towards our goal to deliver products to patients as quickly as possible.” In addition, Oxford Biomedica announces two changes to its Board, both of which will also take effect on 27th March 2023. Stuart Henderson will become Vice Chair, a newly created position which replaces the previously combined role of Deputy Chair and Senior Independent Director, the position Stuart has filled since June 2020. Professor Dame Kay Davies will assume the role of Senior Independent Director, following her appointment as a Non-Executive Director in March 2021. -Ends- Enquiries: Oxford Biomedica plc: Stuart Paynter, Chief Financial Officer – T: +44 (0)1865 783 000Taylor Boyd, VP, Head of IR – T: +1 (984) 268 8488 / E: ir@oxb.comSophia Bolhassan, VP, Corporate Affairs and IR – T: +44 (0) 7394 562 425 / E: ir@oxb.com Consilium Strategic Communications: T: +44 (0)20 3709 5700 / E: oxfordbiomedica@consilium-comms.com Mary-Jane Elliott / Matthew Cole / Matthew Neal About Oxford Biomedica Oxford Biomedica (LSE:OXB) is an innovative leading viral vector specialist focused on delivering life changing therapies to patients. Oxford Biomedica plc and its subsidiaries (the Group) work across key viral vector delivery systems including those based on lentivirus, adeno-associated virus (AAV) and adenovirus, providing innovative solutions to cell and gene therapy biotechnology and biopharma companies for their process development, analytical development and manufacturing needs. Oxford Biomedica has built a sector leading lentiviral vector delivery system, LentiVector® platform, and is working on programmes from pre-clinical to commercial stage across a range of therapeutic areas with global partners. Oxford Biomedica is based across several locations and headquartered in Oxfordshire, UK. In 2022, the Group established Oxford Biomedica Solutions, a US based subsidiary AAV manufacturing and innovation business, based near Boston, US. Further information is available at www.oxb.com.