| 09/06/20 | | 13:00:04 | 9 Jun 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 02/06/20 | | 16:00:01 | 2 Jun 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 01/06/20 | | 14:47:40 | 1 Jun 2020 | | | Total Voting Rights | National Grid PLC | RNS |
| 11/05/20 | | 09:30:01 | 11 May 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 04/05/20 | | 13:00:04 | 4 May 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 01/05/20 | | 14:17:54 | 1 May 2020 | | | Total Voting Rights | National Grid PLC | RNS |
| 27/04/20 | | 14:54:22 | 27 Apr 2020 | | | Disclosure of Rights Attached to Ordinary Shares | National Grid PLC | RNS |
| 16/04/20 | | 15:55:55 | 16 Apr 2020 | | | Amendment to 2020 Financial Calendar | National Grid PLC | RNS |
| 08/04/20 | | 17:13:42 | 8 Apr 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 08/04/20 | | 07:00:06 | 8 Apr 2020 | | | Publication of Supplementary Prospectus | National Grid PLC | RNS |
| 02/04/20 | | 15:30:10 | 2 Apr 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 02/04/20 | | 08:02:05 | 2 Apr 2020 | | | National Grid appoints President of US Business | National Grid PLC | RNS |
| 02/04/20 | | 08:00:04 | 2 Apr 2020 | | | Pre-Close Update ahead of 19/20 Full Year Results | National Grid PLC | RNS |
| 01/04/20 | | 12:59:51 | 1 Apr 2020 | | | Total Voting Rights | National Grid PLC | RNS |
| 25/03/20 | | 16:41:37 | 25 Mar 2020 | | | Second Price Monitoring Extn | National Grid PLC | RNS |
| 25/03/20 | | 16:35:45 | 25 Mar 2020 | | | Price Monitoring Extension | National Grid PLC | RNS |
| 24/03/20 | | 16:41:03 | 24 Mar 2020 | | | Second Price Monitoring Extn | National Grid PLC | RNS |
| 24/03/20 | | 16:36:27 | 24 Mar 2020 | | | Price Monitoring Extension | National Grid PLC | RNS |
| 12/03/20 | | 16:44:59 | 12 Mar 2020 | | | Second Price Monitoring Extn | National Grid PLC | RNS |
| 12/03/20 | | 16:39:08 | 12 Mar 2020 | | | Price Monitoring Extension | National Grid PLC | RNS |
| 10/03/20 | | 16:15:01 | 10 Mar 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 03/03/20 | | 14:00:04 | 3 Mar 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 02/03/20 | | 10:43:09 | 2 Mar 2020 | | | Total Voting Rights | National Grid PLC | RNS |
| 20/02/20 | | 09:30:01 | 20 Feb 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 10/02/20 | | 11:29:23 | 10 Feb 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 07/02/20 | | 16:09:43 | 7 Feb 2020 | | | Holding(s) in Company | National Grid PLC | RNS |
| 05/02/20 | | 09:30:01 | 5 Feb 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 03/02/20 | | 10:23:34 | 3 Feb 2020 | | | Total Voting Rights | National Grid PLC | RNS |
| 30/01/20 | | 11:00:01 | 30 Jan 2020 | | | Succession Plan to Appoint New Chairman | National Grid PLC | RNS |
| 20/01/20 | | 16:00:02 | 20 Jan 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 17/01/20 | | 16:00:04 | 17 Jan 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 15/01/20 | | 16:00:01 | 15 Jan 2020 | | | Total Voting Rights and Capital Update | National Grid PLC | RNS |
| 14/01/20 | | 09:00:05 | 14 Jan 2020 | | | Scrip Dividend | National Grid PLC | RNS |
| 08/01/20 | | 10:57:26 | 8 Jan 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 06/01/20 | | 09:33:51 | 6 Jan 2020 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 02/01/20 | | 09:42:33 | 2 Jan 2020 | | | Total Voting Rights | National Grid PLC | RNS |
| 30/12/19 | | 14:00:02 | 30 Dec 2019 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 13/12/19 | | 10:27:26 | 13 Dec 2019 | | | Holding(s) in Company | National Grid PLC | RNS |
| 10/12/19 | | 14:00:01 | 10 Dec 2019 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 09/12/19 | | 07:00:09 | 9 Dec 2019 | | | RIIO-2 Final Business Plan Submission | National Grid PLC | RNS |
| 05/12/19 | | 13:00:05 | 5 Dec 2019 | | | Scrip Dividend for 2019/20 Interim Dividend | National Grid PLC | RNS |
| 04/12/19 | | 14:12:36 | 4 Dec 2019 | | | Holding(s) in Company | National Grid PLC | RNS |
| 03/12/19 | | 16:59:44 | 3 Dec 2019 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 03/12/19 | | 15:32:24 | 3 Dec 2019 | | | Board Appointment | National Grid PLC | RNS |
| 02/12/19 | | 12:43:46 | 2 Dec 2019 | | | Total Voting Rights | National Grid PLC | RNS |
| 26/11/19 | | 13:46:45 | 26 Nov 2019 | | | Holding(s) in Company | National Grid PLC | RNS |
| 25/11/19 | | 15:49:06 | 25 Nov 2019 | | | Agreement reached with the State of New York | National Grid PLC | RNS |
| 14/11/19 | | 07:00:08 | 14 Nov 2019 | | | Half year results for period ended 30 Sept 2019 | National Grid PLC | RNS |
| 08/11/19 | | 12:52:04 | 8 Nov 2019 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 05/11/19 | | 10:27:46 | 5 Nov 2019 | | | Director's Other Appointments | National Grid PLC | RNS |
