Dividend Declaration

NIOX Group plc

(the "Company")

Dividend Timetable

Oxford, UK - 24 April 2025: NIOX Group plc (AIM: NIOX) is pleased to announce the following timetable for its proposed final dividend in respect of the financial year ended 31 December 2024.

·      Dividend per share: 1.25 pence​

·      Ex-dividend date: 15 May 2025

·      Record date: 16 May 2025

·      Payment date: 16 June 2025

The proposed dividend is subject to shareholder approval at the Company's Annual General Meeting on 14 May 2025.

-Ends-