NIOX GROUP PLC — Director's Dealing 2026

Apr 21, 2026

National Storage Mechanism | Additional information

RNS Number : 3443B

Niox Group PLC

21 April 2026

NIOX Group plc

("NIOX" or the "Company")

Director/PDMR Shareholding

21 April 2026

NIOX Group plc (AIM: NIOX) notifies that on 20 April 2026 its Chief Executive Officer, Jonathan Emms, sold 69,494 ordinary shares of 0.08 pence each ("Ordinary Shares") from his share dealing account at a price of 57.56 pence per share and immediately repurchased 34,542 Ordinary Shares into his ISA at 57.90 pence per share. Additionally, Sharon Emms, Jonathan Emms' spouse and therefore a Person Closely Associated ("PCA"), purchased 34,539 Ordinary Shares into her ISA at 57.88 pence per share.

Resulting interests

Following these transactions, Jonathan Emms' total reportable shareholding in the Company is 3,658,498 Ordinary Shares (including those held in his wife's name), which equates to 0.87% of the Company's issued share capital.

Additional detail is provided below in accordance with the requirements of UK MAR.

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 & Broker) Jen Boorer / James Fischer	+44 (0) 20 7496 3000

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

1.         

Details of the person discharging managerial responsibilities / person closely associated

a.         

Name

Jonathan Emms

2.  

Reason for the notification

a.         

Position/status

Chief Executive Officer

b.         

Initial notification

/Amendment

Initial notification

3.         

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a.         

Name

NIOX Group plc

b.         

LEI

2138006YAT138TOGA556

4.         

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a.         

Description of the

Financial instrument, type of instrument

Identification code

Ordinary Shares of 0.08p each

GB00BJVD3B28

b.         

Nature of the transaction

Sale of Ordinary Shares and repurchase of Ordinary Shares into ISA

c.         

Price(s) and volume(s)

Price(s)	Volume(s)
57.56p (sale)	69,494
57.90p (purchase)	34,542

d.         

Aggregated information

·      Aggregated volume

·      Price

n/a

e.         

Date of the transaction

20/04/2026

f.         

Place of the transaction

London Stock Exchange, AIM

2.         

Details of the person discharging managerial responsibilities / person closely associated

a.         

Name

Sharon Emms

5.  

Reason for the notification

a.         

Position/status

PCA of Jonathan Emms, Chief Executive Officer

b.         

Initial notification

/Amendment

Initial notification

6.         

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a.         

Name

NIOX Group plc

b.         

LEI

2138006YAT138TOGA556

7.         

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a.         

Description of the

Financial instrument, type of instrument

Identification code

Ordinary Shares of 0.08p each

GB00BJVD3B28

b.         

Nature of the transaction

Purchase of Ordinary Shares in ISA

c.         

Price(s) and volume(s)

Price(s)	Volume(s)
57.88p	34,539

d.         

Aggregated information

·      Aggregated volume

·      Price

n/a

e.         

Date of the transaction

20/04/2026

f.         

Place of the transaction

London Stock Exchange, AIM

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