| 24/03/21 | 11:14:01 | 24 Mar 2021 | | Holding(s) in Company | RNS |
| 19/03/21 | 15:00:02 | 19 Mar 2021 | | Holding(s) in Company | RNS |
| 18/03/21 | 11:53:12 | 18 Mar 2021 | | Director/PDMR Shareholding | RNS |
| 09/03/21 | 16:40:06 | 9 Mar 2021 | | Holding(s) in Company | RNS |
| 08/03/21 | 12:20:26 | 8 Mar 2021 | | Holding(s) in Company | RNS |
| 24/02/21 | 16:17:59 | 24 Feb 2021 | | Director/PDMR Shareholding | RNS |
| 18/02/21 | 15:45:05 | 18 Feb 2021 | | Director/PDMR Shareholding | RNS |
| 16/02/21 | 09:15:04 | 16 Feb 2021 | | Holding(s) in Company | RNS |
| 12/02/21 | 10:15:00 | 12 Feb 2021 | | Holding(s) in Company | RNS |
| 08/02/21 | 14:14:58 | 8 Feb 2021 | | Director/PDMR Shareholding | RNS |
| 08/02/21 | 14:02:09 | 8 Feb 2021 | | Director/PDMR Shareholding | RNS |
| 22/01/21 | 16:15:01 | 22 Jan 2021 | | Holding(s) in Company | RNS |
| 22/01/21 | 10:31:25 | 22 Jan 2021 | | Director/PDMR Shareholding | RNS |
| 12/01/21 | 07:00:06 | 12 Jan 2021 | | Appointment of Chief Financial Officer | RNS |
| 18/12/20 | 15:29:01 | 18 Dec 2020 | | Director/PDMR Shareholding | RNS |
| 20/11/20 | 14:55:12 | 20 Nov 2020 | | Director/PDMR Shareholding | RNS |
| 19/11/20 | 07:00:07 | 19 Nov 2020 | | Johnson Matthey half year results 30 Sept 2020 | RNS |
| 13/11/20 | 16:45:01 | 13 Nov 2020 | | Holding(s) in Company | RNS |
| 22/10/20 | 16:49:09 | 22 Oct 2020 | | Director/PDMR Shareholding | RNS |
| 29/09/20 | 16:52:05 | 29 Sept 2020 | | Director/PDMR Shareholding | RNS |
| 21/09/20 | 16:08:37 | 21 Sept 2020 | | Director/PDMR Shareholding | RNS |
| 18/09/20 | 16:21:17 | 18 Sept 2020 | | Director/PDMR Shareholding | RNS |
| 18/09/20 | 07:00:02 | 18 Sept 2020 | | Johnson Matthey: Hydrogen Seminar | RNS |
| 21/08/20 | 09:05:33 | 21 Aug 2020 | | Director/PDMR Shareholding | RNS |
| 11/08/20 | 10:12:53 | 11 Aug 2020 | | Doug Webb - New Directorship | RNS |
| 06/08/20 | 16:19:34 | 6 Aug 2020 | | Director/PDMR Shareholding | RNS |
| 06/08/20 | 16:11:41 | 6 Aug 2020 | | Director/PDMR Shareholding | RNS |
| 05/08/20 | 16:25:02 | 5 Aug 2020 | | Director/PDMR Shareholding | RNS |
| 05/08/20 | 16:21:31 | 5 Aug 2020 | | Director/PDMR Shareholding | RNS |
| 05/08/20 | 16:04:32 | 5 Aug 2020 | | Director/PDMR Shareholding | RNS |
| 30/07/20 | 14:45:03 | 30 Jul 2020 | | Director Declaration | RNS |
| 23/07/20 | 15:25:02 | 23 Jul 2020 | | Result of AGM | RNS |
| 23/07/20 | 07:00:06 | 23 Jul 2020 | | Johnson Matthey Q1 AGM trading update | RNS |
| 17/07/20 | 13:31:18 | 17 Jul 2020 | | Director/PDMR Shareholding | RNS |
| 14/07/20 | 12:18:50 | 14 Jul 2020 | | Director/PDMR Shareholding | RNS |
| 25/06/20 | 07:00:08 | 25 Jun 2020 | | Anna Manz, CFO, to leave JM and join LSEG | RNS |
| 23/06/20 | 07:00:03 | 23 Jun 2020 | | Annual Financial Report | RNS |
| 19/06/20 | 15:14:21 | 19 Jun 2020 | | Director/PDMR Shareholding | RNS |
| 16/06/20 | 17:13:43 | 16 Jun 2020 | | Director/PDMR Shareholding | RNS |
| 16/06/20 | 09:00:05 | 16 Jun 2020 | | Company Secretary Change | RNS |
| 11/06/20 | 07:00:06 | 11 Jun 2020 | | Preliminary results for year ended 31st March 2020 | RNS |
| 04/06/20 | 16:35:12 | 4 Jun 2020 | | Director/PDMR Shareholding | RNS |
| 21/05/20 | 16:08:40 | 21 May 2020 | | Director/PDMR Shareholding | RNS |
| 12/05/20 | 07:00:04 | 12 May 2020 | | Johnson Matthey revised date for full year results | RNS |
| 28/04/20 | 15:45:01 | 28 Apr 2020 | | Rights attaching to ordinary shares | RNS |
| 22/04/20 | 07:00:03 | 22 Apr 2020 | | JM and COVID-19: supporting our stakeholders | RNS |
| 16/04/20 | 16:56:35 | 16 Apr 2020 | | Director/PDMR Shareholding | RNS |
| 02/04/20 | 11:31:10 | 2 Apr 2020 | | Jane Griffiths - New Directorship | RNS |
| 01/04/20 | 08:00:07 | 1 Apr 2020 | | Company Secretary Change | RNS |
| 30/03/20 | 08:00:07 | 30 Mar 2020 | | Johnson Matthey pre-close trading statement | RNS |
