Statement regarding NIOX Group Plc

THIS IS AN ANNOUNCEMENT TO WHICH RULE 2.8 OF THE CITY CODE ON TAKEOVERS AND MERGERS (THE "CODE") APPLIES.

Keensight Capital

Statement regarding NIOX Group plc

Further to the announcement made by NIOX Group plc ("NIOX") regarding a possible cash offer for NIOX by Keensight Capital ("Keensight"), Keensight confirms that, in light of the current macro-economic backdrop, it does not intend to make a firm offer for NIOX. Consequently, Keensight is bound by the restrictions set out under Rule 2.8 of the Code, except with the consent of the Panel.

Under Note 2 on Rule 2.8 of the Code, Keensight and any person acting in concert with Keensight, reserve the right to set aside the restrictions in Rule 2.8 in the following circumstances: (i) with the agreement of the Board of NIOX; (ii) if a third party announces a firm intention to make an offer for NIOX; (iii) if NIOX announces a Rule 9 waiver proposal (see Note 1 of the Notes on Dispensations from Rule 9) or a reverse takeover (as defined in the Code); or (iv) if there has been a material change of circumstances (as determined by the Panel on Takeovers and Mergers).

Keensight, on behalf of its managed funds, and any person acting in concert with Keensight, reserves the right to acquire and/or offer to acquire NIOX shares or interests in NIOX shares subject to and in accordance with the Code (including Rule 2.8) and other applicable regulations.

The person(s) responsible for arranging release of this announcement on behalf of Keensight are Cindy Giraud, Communications Director and Stephanie Ellis (Headland Consultancy).

About Keensight Capital

Keensight Capital ("Keensight"), one of the leading European Growth Buyout firms, is committed to supporting entrepreneurs as they implement their growth strategies. With over 25 years of experience and €5.5bn of assets under management, Keensight Capital's team of seasoned professionals leverages their differentiated private equity experience to invest in profitably growing companies generating revenues in the range of €10 million to €400 million. Drawing on its expertise in the Technology and Healthcare sectors, Keensight identifies the best investment opportunities in Europe and works closely with the management teams providing capital, strategic guidance and operational support. Keensight operates in more than 90 countries across the globe with a presence in Paris, London, Boston, and Singapore.