| 19/03/20 | 15:11:41 | 19 Mar 2020 | | Director/PDMR Shareholding | RNS |
| 25/02/20 | 11:04:04 | 25 Feb 2020 | | Director/PDMR Shareholding | RNS |
| 20/02/20 | 15:35:59 | 20 Feb 2020 | | Director/PDMR Shareholding | RNS |
| 06/02/20 | 17:33:42 | 6 Feb 2020 | | Director/PDMR Shareholding | RNS |
| 06/02/20 | 15:52:31 | 6 Feb 2020 | | Director/PDMR Shareholding | RNS |
| 06/02/20 | 15:41:40 | 6 Feb 2020 | | Director/PDMR Shareholding | RNS |
| 06/02/20 | 15:29:25 | 6 Feb 2020 | | Director/PDMR Shareholding | RNS |
| 04/02/20 | 07:30:02 | 4 Feb 2020 | | John O'Higgins - New Directorship | RNS |
| 17/01/20 | 10:09:09 | 17 Jan 2020 | | Director/PDMR Shareholding | RNS |
| 19/12/19 | 16:31:37 | 19 Dec 2019 | | Director/PDMR Shareholding | RNS |
| 26/11/19 | 17:06:49 | 26 Nov 2019 | | Holding(s) in Company | RNS |
| 26/11/19 | 17:01:05 | 26 Nov 2019 | | Director/PDMR Shareholding | RNS |
| 26/11/19 | 16:53:10 | 26 Nov 2019 | | Director/PDMR Shareholding | RNS |
| 26/11/19 | 16:41:07 | 26 Nov 2019 | | Director/PDMR Shareholding | RNS |
| 25/11/19 | 11:56:39 | 25 Nov 2019 | | Director/PDMR Shareholding | RNS |
| 25/11/19 | 10:18:10 | 25 Nov 2019 | | Director/PDMR Shareholding | RNS |
| 21/11/19 | 14:24:20 | 21 Nov 2019 | | Director/PDMR Shareholding | RNS |
| 21/11/19 | 07:00:10 | 21 Nov 2019 | | Half-year Report | RNS |
| 17/10/19 | 16:46:11 | 17 Oct 2019 | | Director/PDMR Shareholding | RNS |
| 19/09/19 | 17:21:12 | 19 Sept 2019 | | Director/PDMR Shareholding | RNS |
| 19/09/19 | 08:00:13 | 19 Sept 2019 | | Johnson Matthey Capital Markets Day | RNS |
| 22/08/19 | 16:02:34 | 22 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 22/08/19 | 15:55:16 | 22 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 22/08/19 | 15:44:21 | 22 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 22/08/19 | 12:53:00 | 22 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 12/08/19 | 10:49:45 | 12 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 09/08/19 | 10:45:56 | 9 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 09/08/19 | 10:19:09 | 9 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 09/08/19 | 10:06:24 | 9 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 08/08/19 | 10:53:52 | 8 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 07/08/19 | 13:42:22 | 7 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 07/08/19 | 13:33:39 | 7 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 06/08/19 | 12:06:31 | 6 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 06/08/19 | 11:59:27 | 6 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 06/08/19 | 11:54:44 | 6 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 02/08/19 | 12:40:27 | 2 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 02/08/19 | 12:33:35 | 2 Aug 2019 | | Director/PDMR Shareholding | RNS |
| 19/07/19 | 10:12:11 | 19 Jul 2019 | | Director/PDMR Shareholding | RNS |
| 17/07/19 | 16:24:02 | 17 Jul 2019 | | Result of AGM | RNS |
| 17/07/19 | 08:00:04 | 17 Jul 2019 | | John Walker to retire; succeeded by Joan Braca | RNS |
| 17/07/19 | 08:00:03 | 17 Jul 2019 | | AGM trading update | RNS |
| 20/06/19 | 15:05:15 | 20 Jun 2019 | | Director/PDMR Shareholding | RNS |
| 14/06/19 | 08:00:02 | 14 Jun 2019 | | Annual Financial Report | RNS |
| 30/05/19 | 08:00:04 | 30 May 2019 | | Preliminary results for year ended 31st March 2019 | RNS |
| 28/05/19 | 08:00:12 | 28 May 2019 | | Directorate Changes | RNS |
| 17/05/19 | 15:03:30 | 17 May 2019 | | Director/PDMR Shareholding | RNS |
| 18/04/19 | 16:41:19 | 18 Apr 2019 | | Director/PDMR Shareholding | RNS |
| 01/04/19 | 08:00:07 | 1 Apr 2019 | | Directorate Change | RNS |
| 28/03/19 | 07:00:19 | 28 Mar 2019 | | Strategic developments in eLNO commercialisation | RNS |
| 21/03/19 | 15:45:11 | 21 Mar 2019 | | Director/PDMR Shareholding | RNS |
