Block Listing Cancellation and Interim Review

Summary by AI ^BETAClose X

NIOX Group plc has announced the cancellation of block listings for several share schemes, including the Circassia 2015 Performance Share Plan Scheme and various NIOX Save As You Earn and Performance Share Plan Schemes, totaling 382,679 ordinary shares. This cancellation is due to the completion of all outstanding options or lapses within these plans. Concurrently, the company provided an interim update on its active block listings, reporting a total of 8,162,838 unallotted securities remaining across its various schemes as of March 31, 2026.

Disclaimer*

Niox Group PLC

02 April 2026

NIOX Group plc

("NIOX" or the "Company")

Block Listing Cancellation and Interim Review

Oxford, UK - 2 April 2026: NIOX Group plc (AIM: NIOX) makes the following notification pursuant to Schedule Six of the AIM Rules for Companies regarding its existing block listing arrangements.

It also announces that applications have been made for certain of its share schemes and the relevant block listings to be cancelled, as set out below.

Active block listings

An interim block listing return is set out below.

Name of the company:

NIOX Group plc

Name of relevant scheme:

1.	Circassia 2016 Performance Share Plan Scheme
2.	Circassia 2017 Performance Share Plan Scheme
3.	Circassia 2020 Save As You Earn Scheme (UK)
4.	NIOX 2020 Performance Share Plan Scheme
5.	NIOX 2023 Deferred Share Bonus Plan
6.	NIOX 2022 Performance Share Plan Scheme
7.	NIOX 2024 Save As You Earn Scheme (UK)
8.	NIOX 2023 Save As You Earn Scheme (UK)
9.	NIOX 2023 Performance Share Plan Scheme

Period of return:

From:

1 October 2025

To:

31 March 2026

Balance of unallotted securities under scheme(s) from previous return:

1.	526,382
2.	112,115
3.	309,633
4.	657,815
5.	264,562
6.	1,295,096
7.	-
8.	-
9.	-
Total	3,165,603

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

1.	-
2.	-
3.	-
4.	-
5.	-
6.	-
7.	115,340
8.	165,413
9.	4,919,318

Less: Number of securities issued/allotted under scheme(s) during period:

1.	26,868
2.	-
3.	-
4.	-
5.	135,188
6.	-
7.	17,730
8.	23,050
9.	-

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

1.	499,514
2.	112,115
3.	309,633
4.	657,815
5.	129,374
6.	1,295,096
7.	97,610
8.	142,363
9.	4,919,318
Total	8,162,838

Number and class of securities originally listed and the date of admission:

1.	930,000 - 1 July 2019
2.	980,000 - 22 May 2020
2.	250,000 - 11 October 2021
3.	1,141,658 - 8 April 2021
4.	5,009,135 - 2 August 2023
5.	1,470,000 - 28 May 2024
6.	6,862,848 - 16 April 2025
7.	115,340 - 2 December 2025
8.	165,413 - 21 January 2026
9.	4,919,318 - 20 March 2026

Name of contact:	Rebecca Clayton-Wherity
Telephone number of contact:	+44 3303 309 356

Cancelled block listings

NIOX currently has 382,679 ordinary shares of £0.0008 each, which are block listed in relation to share schemes where all outstanding options have now been exercised, or have lapsed, and the scheme has closed. These plans are: Circassia 2015 Performance Share Plan Scheme; NIOX 2022 Deferred Share Bonus Plan; NIOX 2021 Save As You Earn Scheme (US); NIOX 2022 Save As You Earn Scheme (UK), and; NIOX 2019 Performance Share Plan Scheme (numbered 1 to 5 below). As a result, application has been made for the block listings associated with these schemes to be cancelled.

The Company has made no allotments under these plans since the last block listing return was released on 1 October 2025.

A final block listing return is set out below in relation to the cancelled share schemes.

Please note, this is the final return for these block listings. No further shares will be allotted pursuant to this block listing.

Name of the company:		NIOX Group plc
Name of relevant scheme:		1. Circassia 2015 Performance Share Plan Scheme 2. NIOX 2022 Deferred Share Bonus Plan 3. NIOX 2021 Save As You Earn Scheme (US) 4. NIOX 2022 Save As You Earn Scheme (UK) 5. NIOX 2019 Performance Share Plan Scheme
Period of return:	From:	1 October 2025	To:	31 March 2026
Balance of unallotted securities under scheme(s) from previous return:		1. 127,923 2. 254,756 3. - 4. - 5. - Total 382,679
Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):		1. to 6. inclusive: Nil
Less: Number of securities issued/allotted under scheme(s) during period:		1. to 6. inclusive: Nil
Equals: Balance under scheme(s) not yet issued/allotted at end of period:		1. 127,923 2. 254,756 3. - 4. - 5. - Total 382,679
Number and class of securities originally listed and the date of admission:		1. 400,000 - 21 May 2018 2. 1,470,000 - 28 May 2023 3. 71,885 - 10 November 2023 4. 1,128,966 - 28 May 2025 5. 78,927 - 28 May 2025

For further information, please contact:

Singer Capital Markets (Nominated Adviser & Broker)

Jen Boorer / James Fischer

+44 (0) 20 7496 3000

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