NIOX Group plc

("NIOX" or the "Company")

Director/PDMR Shareholding

26 June 2025

NIOX Group plc (AIM: NIOX) announces it has issued 144,844 new ordinary shares in the Company ("Ordinary Shares") to Ian Johnson, Non-Executive Chairman, under the Company's Deferred Share Bonus Plan (the "Plan").

The share issue was made in respect of the annual bonus for the 2023 financial year, which was granted on 20 March 2024 when he was employed as Executive Chairman. Under the terms of the Company's remuneration policy, 25% of this bonus was paid in shares at that time with the remaining 75% of this bonus deferred for two years, other than for the sale of shares to satisfy any tax liability created on grant. On Ian's transition to Non-Executive Chairman, the two-year deferral period was waived. The allotment of these previously deferred shares took place yesterday.

The 144,844 new Ordinary Shares issued in connection with this award are subject to an existing block admission for the respective Plan and rank pari passu with the Company's existing Ordinary Shares.

Following this allotment, Ian Johnson's interest in the Company is as follows:

Total voting rights

Since the last total voting rights disclosure, certain employees exercised options over a total of 189,502 Ordinary Shares of 0.08p ("Ordinary Shares") under the Company's share option schemes.

Following the above, the Company's issued share capital comprises 417,751,925 Ordinary Shares, each carrying one voting right. This number may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure and Transparency Rules.

Additional details are provided below in accordance with the requirements of UK MAR.

Notification and public disclosure of transactions by persons discharging managerial responsibilities and persons closely associated with them