Niox Group PlcLSE: NIOX

Change of Adviser

· Issued by Niox Group Plc

NIOX GROUP PLC

("NIOX" or the "Company")

Change of Adviser

Oxford, UK - 27 May 2025: NIOX Group plc (LSE: NIOX) announces that Singer Capital Markets is now sole broker to the Company and continues to act as the Company's Nominated Adviser.

For further information, please contact:

NIOX Group plc

Jonathan Emms, Chief Executive Officer                                                  Sarah Duncan, Chief Financial Officer

Rebecca Clayton-Wherity, Company Secretary

+44 (0) 3303 309 356

Singer Capital Markets (Nominated Adviser and Joint Broker)

Jen Boorer / James Fischer / James Todd

+44 (0) 20 7496 3000