National Storage Mechanism | Additional information

13 May 2025

SulNOx Group Plc

(the "Company" or "SulNOx")

Holding in the Company

(Aquis Stock Exchange: SNOX)

The board of directors of the Company (the "Board") has been informed that Constantine Logothetis' holding of SulNOx ordinary shares of 2 pence each ("Ordinary Shares") has increased to 36,595,700 Ordinary Shares equivalent to 28.76% of the Ordinary Shares in issue (including shares held by companies in which Constantine Logothetis holds a majority interest).

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For further information please contact:

SulNOx Group plc
Steven Cowin, CFO

Tel: 07624 491 821

Allenby Capital Limited

(AQSE Corporate Adviser)

Nick Harriss / John Depasquale

(Corporate Finance)

Guy McDougall

(Equity Sales)

Tel: 020 3328 5656

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