| 19/11/21 | 15:30:01 | 19 Nov 2021 | | Holding(s) in Company | RNS |
| 19/11/21 | 14:02:11 | 19 Nov 2021 | | Director/PDMR Shareholding | RNS |
| 17/11/21 | 09:47:28 | 17 Nov 2021 | | Holding(s) in Company | RNS |
| 11/11/21 | 07:00:02 | 11 Nov 2021 | | Intent to exit Battery Materials, trading update | RNS |
| 11/11/21 | 07:00:02 | 11 Nov 2021 | | Chief Executive Announcement | RNS |
| 01/11/21 | 08:30:01 | 1 Nov 2021 | | Jane Griffiths - External Directorship | RNS |
| 22/10/21 | 10:13:44 | 22 Oct 2021 | | Director/PDMR Shareholding | RNS |
| 12/10/21 | 10:47:30 | 12 Oct 2021 | | Holding(s) in Company | RNS |
| 05/10/21 | 08:00:08 | 5 Oct 2021 | | John O'Higgins - External Directorship | RNS |
| 28/09/21 | 12:25:44 | 28 Sept 2021 | | Holding(s) in Company | RNS |
| 20/09/21 | 13:20:07 | 20 Sept 2021 | | Holding(s) in Company | RNS |
| 16/09/21 | 12:45:01 | 16 Sept 2021 | | Director/PDMR Shareholding | RNS |
| 25/08/21 | 18:01:19 | 25 Aug 2021 | | Holding(s) in Company | RNS |
| 20/08/21 | 14:51:43 | 20 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 18/08/21 | 16:21:42 | 18 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 18/08/21 | 16:12:34 | 18 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 12/08/21 | 11:10:06 | 12 Aug 2021 | | Holding(s) in Company | RNS |
| 09/08/21 | 13:52:06 | 9 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 06/08/21 | 11:45:01 | 6 Aug 2021 | | Holding(s) in Company | RNS |
| 05/08/21 | 14:47:07 | 5 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 05/08/21 | 12:17:10 | 5 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 05/08/21 | 12:13:14 | 5 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 05/08/21 | 12:06:32 | 5 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 05/08/21 | 11:43:08 | 5 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 04/08/21 | 16:22:47 | 4 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 04/08/21 | 16:08:00 | 4 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 04/08/21 | 15:51:43 | 4 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 04/08/21 | 15:34:44 | 4 Aug 2021 | | Director/PDMR Shareholding | RNS |
| 02/08/21 | 15:45:06 | 2 Aug 2021 | | Holding(s) in Company | RNS |
| 30/07/21 | 16:15:57 | 30 Jul 2021 | | Holding(s) in Company | RNS |
| 29/07/21 | 12:40:02 | 29 Jul 2021 | | Result of AGM | RNS |
| 29/07/21 | 07:00:12 | 29 Jul 2021 | | Directorate Change | RNS |
| 29/07/21 | 07:00:06 | 29 Jul 2021 | | Johnson Matthey Q1 AGM trading update | RNS |
| 22/07/21 | 16:24:19 | 22 Jul 2021 | | Director/PDMR Shareholding | RNS |
| 13/07/21 | 17:39:11 | 13 Jul 2021 | | Holding(s) in Company | RNS |
| 12/07/21 | 16:05:01 | 12 Jul 2021 | | Holding(s) in Company | RNS |
| 09/07/21 | 17:01:47 | 9 Jul 2021 | | Holding(s) in Company | RNS |
| 21/06/21 | 15:15:42 | 21 Jun 2021 | | Holding(s) in Company | RNS |
| 18/06/21 | 15:54:54 | 18 Jun 2021 | | Holding(s) in Company | RNS |
| 17/06/21 | 15:56:25 | 17 Jun 2021 | | Director/PDMR Shareholding | RNS |
| 15/06/21 | 09:00:02 | 15 Jun 2021 | | Annual Financial Report | RNS |
| 10/06/21 | 16:15:06 | 10 Jun 2021 | | Holding(s) in Company | RNS |
| 27/05/21 | 07:04:15 | 27 May 2021 | | Preliminary results for year ended 31st March 2021 | RNS |
| 26/05/21 | 07:00:06 | 26 May 2021 | | Johnson Matthey and Plug Power green hydrogen MoU | RNS |
| 20/05/21 | 11:34:24 | 20 May 2021 | | Director/PDMR Shareholding | RNS |
| 23/04/21 | 09:51:52 | 23 Apr 2021 | | Director/PDMR Shareholding | RNS |
| 19/04/21 | 07:00:07 | 19 Apr 2021 | | Strategic developments in eLNO commercialisation | RNS |
| 09/04/21 | 16:10:00 | 9 Apr 2021 | | Holding(s) in Company | RNS |
| 08/04/21 | 11:10:39 | 8 Apr 2021 | | Holding(s) in Company | RNS |
| 08/04/21 | 07:00:02 | 8 Apr 2021 | | Trading update and strategic review of Health | RNS |
