| 21/05/25 | 17:00:01 | 21 May 2025 | | Holding(s) in Company | RNS |
| 21/05/25 | 12:30:00 | 21 May 2025 | | Exercise of Options, Director Dealing and TVR | RNS |
| 14/05/25 | 15:00:43 | 14 May 2025 | | Result of Annual General Meeting | RNS |
| 14/05/25 | 07:00:01 | 14 May 2025 | | AGM Statement | RNS |
| 01/05/25 | 07:00:02 | 1 May 2025 | | Total Voting Rights Update | RNS |
| 24/04/25 | 10:49:46 | 24 Apr 2025 | | Dividend Declaration | RNS |
| 15/04/25 | 08:00:01 | 15 Apr 2025 | | Notice of 2025 Annual General Meeting | RNS |
| 14/04/25 | 10:23:05 | 14 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 11/04/25 | 12:17:09 | 11 Apr 2025 | | Form 8.3 - Niox Group Plc | RNS |
| 11/04/25 | 11:39:39 | 11 Apr 2025 | | Form 8.5 (EPT/RI) | RNS |
| 11/04/25 | 11:36:08 | 11 Apr 2025 | | Form 8.5 (EPT/RI) - Niox Group plc | RNS |
| 11/04/25 | 11:31:33 | 11 Apr 2025 | | PDMR / PCA Shareholding | RNS |
| 11/04/25 | 09:57:11 | 11 Apr 2025 | | Form 8.3 - NIOX Group plc | RNS |
| 11/04/25 | 07:00:08 | 11 Apr 2025 | | Response to Rule 2.8 Announcement | RNS |
| 11/04/25 | 07:00:08 | 11 Apr 2025 | | Statement regarding NIOX Group Plc | RNS |
| 10/04/25 | 15:30:01 | 10 Apr 2025 | | Block Listing Application | RNS |
| 10/04/25 | 11:57:51 | 10 Apr 2025 | | Form 8.5 (EPT/RI) | RNS |
| 10/04/25 | 11:56:05 | 10 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 10/04/25 | 11:42:43 | 10 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 10/04/25 | 11:29:03 | 10 Apr 2025 | | Form 8.5 (EPT/RI) - Niox Group plc | RNS |
| 09/04/25 | 13:01:24 | 9 Apr 2025 | | Form 8.3 - Niox Group Plc | RNS |
| 09/04/25 | 11:47:50 | 9 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 09/04/25 | 11:44:44 | 9 Apr 2025 | | Form 8.3 - NIOX GROUP PLC | RNS |
| 09/04/25 | 11:24:40 | 9 Apr 2025 | | Form 8.5 (EPT/RI) - Niox Group plc | RNS |
| 09/04/25 | 09:18:58 | 9 Apr 2025 | | Form 8.5 (EPT/RI) | RNS |
| 08/04/25 | 16:00:01 | 8 Apr 2025 | | Form 8.3 - Niox Group | RNS |
| 08/04/25 | 11:56:58 | 8 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 08/04/25 | 11:20:45 | 8 Apr 2025 | | Form 8.5 (EPT/RI) - Niox Group plc | RNS |
| 08/04/25 | 10:48:33 | 8 Apr 2025 | | Form 8.5 (EPT/RI) | RNS |
| 07/04/25 | 14:51:58 | 7 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 07/04/25 | 12:15:18 | 7 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 07/04/25 | 11:59:51 | 7 Apr 2025 | | Form 8.5 (EPT/RI) - Niox Group plc | RNS |
| 07/04/25 | 11:28:50 | 7 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 07/04/25 | 10:20:32 | 7 Apr 2025 | | Form 8.5 (EPT/RI) | RNS |
| 04/04/25 | 13:58:23 | 4 Apr 2025 | | Form 8.3 - NIOX Group plc | RNS |
| 04/04/25 | 11:55:54 | 4 Apr 2025 | | Form 8.5 (EPT/RI) | RNS |
| 04/04/25 | 11:07:56 | 4 Apr 2025 | | Form 8.5 (EPT/RI) - Niox Group plc | RNS |
| 04/04/25 | 09:48:52 | 4 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 03/04/25 | 12:04:35 | 3 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 03/04/25 | 11:54:25 | 3 Apr 2025 | | Form 8.5 (EPT/RI) - Niox Group plc | RNS |
| 03/04/25 | 10:51:03 | 3 Apr 2025 | | Form 8.5 (EPT/RI) | RNS |
| 02/04/25 | 13:30:44 | 2 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 02/04/25 | 13:27:49 | 2 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 02/04/25 | 13:02:37 | 2 Apr 2025 | | Form 8 (OPD) NIOX Group PLC | RNS |
| 02/04/25 | 11:59:45 | 2 Apr 2025 | | Form 8.3 - NIOX Group plc | RNS |
| 02/04/25 | 11:58:15 | 2 Apr 2025 | | Form 8.5 (EPT/RI) - Niox Group plc | RNS |
| 02/04/25 | 10:58:46 | 2 Apr 2025 | | Form 8.5 (EPT/RI) | RNS |
| 02/04/25 | 08:00:00 | 2 Apr 2025 | | Form 8.3 - NIOX Group PLC | RNS |
| 01/04/25 | 13:02:04 | 1 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
| 01/04/25 | 12:54:29 | 1 Apr 2025 | | Form 8.3 - Niox Group plc | RNS |
