Directorate Change

Oxford, UK - 16 January 2025: NIOX Group plc (("NIOX", the "Company" or the "Group"; AIM: NIOX), a medical device company focused on point of care asthma diagnosis, monitoring and management, is pleased to announce the following board changes.

Ian Johnson, currently Executive Chairman, will move to Non-Executive Chairman with effect from the 2025 AGM, which is expected to be held on 14 May 2025.

Jonathan Emms, currently Chief Operating Officer, has been appointed Chief Executive Officer with immediate effect.

Michael Roller, currently Chief Financial Officer, has indicated to the Board that he intends to retire with effect from the 2025 AGM, which is expected to be held on 14 May 2025. Michael will remain available to the Group as a consultant, as and when required.

Sarah Duncan, currently Group Financial Controller and Company Secretary, will succeed Michael as Chief Financial Officer on his retirement. Sarah has worked for the Group since 2018.

Sarah qualified as a Chartered Accountant with PwC and subsequently worked at Unipart for two years prior to joining the Group as Group Finance Manager in 2018 and becoming Company Secretary in November 2020. She was promoted to her current role in April 2024.

Ian Johnson, NIOX's Executive Chairman, said: "The current executive team have worked together since the beginning of 2020 and have led the successful turnaround of the business. Jonathan's and Sarah's promotions from within the business are well deserved and provide stability and continuity. I congratulate both and wish them every success."

Additional information

The following information is being disclosed pursuant to Rule 17 and paragraph (g) of Schedule 2 of the AIM Rules for Companies in relation to the appointment of Sarah Elizabeth Duncan, aged 33, to the Board.

Sarah Duncan has been a director or partner of the following companies or partnerships during the five years preceding the date of this announcement:

Current directorships: Niox Healthcare Limited, Niox Limited, JMD Orthopaedics Limited

Past directorships (last five years): None

As at the date of this announcement, Sarah Duncan owns no shares in the Company and holds options over 506,219 shares in the Company.