| 20/08/18 | | 16:23:12 | 20 Aug 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 16/08/18 | | 17:38:16 | 16 Aug 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 15/08/18 | | 17:00:03 | 15 Aug 2018 | | | Total Voting Rights and Capital Update | National Grid PLC | RNS |
| 14/08/18 | | 11:57:51 | 14 Aug 2018 | | | Publication of ARA - Grp Company With Listed Debt | National Grid PLC | RNS |
| 14/08/18 | | 10:47:18 | 14 Aug 2018 | | | Scrip Dividend | National Grid PLC | RNS |
| 10/08/18 | | 17:40:09 | 10 Aug 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 06/08/18 | | 17:00:03 | 6 Aug 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 02/08/18 | | 15:54:48 | 2 Aug 2018 | | | Publication of a Prospectus | National Grid PLC | RNS |
| 01/08/18 | | 11:08:10 | 1 Aug 2018 | | | Total Voting Rights | National Grid PLC | RNS |
| 31/07/18 | | 17:04:04 | 31 Jul 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 30/07/18 | | 15:20:10 | 30 Jul 2018 | | | Result of AGM | National Grid PLC | RNS |
| 20/07/18 | | 17:00:01 | 20 Jul 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 06/07/18 | | 17:00:04 | 6 Jul 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 03/07/18 | | 17:00:03 | 3 Jul 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 02/07/18 | | 12:00:04 | 2 Jul 2018 | | | Total Voting Rights | National Grid PLC | RNS |
| 28/06/18 | | 17:00:01 | 28 Jun 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 18/06/18 | | 17:00:02 | 18 Jun 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 11/06/18 | | 14:20:00 | 11 Jun 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 07/06/18 | | 14:00:08 | 7 Jun 2018 | | | Scrip Dividend for 2017/18 Final Dividend | National Grid PLC | RNS |
| 07/06/18 | | 13:20:19 | 7 Jun 2018 | | | Three-year rate plan settlement filed for RI | National Grid PLC | RNS |
| 05/06/18 | | 17:32:33 | 5 Jun 2018 | | | Holding(s) in Company | National Grid PLC | RNS |
| 04/06/18 | | 13:50:01 | 4 Jun 2018 | | | Publication of Annual Report and Accounts | National Grid PLC | RNS |
| 01/06/18 | | 11:00:47 | 1 Jun 2018 | | | Total Voting Rights | National Grid PLC | RNS |
| 30/05/18 | | 14:00:01 | 30 May 2018 | | | Holding(s) in Company | National Grid PLC | RNS |
| 24/05/18 | | 09:42:43 | 24 May 2018 | | | Director's Other Appointment | National Grid PLC | RNS |
| 15/05/18 | | 15:22:35 | 15 May 2018 | | | Board Change | National Grid PLC | RNS |
| 11/05/18 | | 12:54:31 | 11 May 2018 | | | Director's Other Appointment | National Grid PLC | RNS |
| 10/05/18 | | 17:00:02 | 10 May 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 08/05/18 | | 17:00:01 | 8 May 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 04/05/18 | | 08:00:10 | 4 May 2018 | | | Directorate Change | National Grid PLC | RNS |
| 01/05/18 | | 12:12:26 | 1 May 2018 | | | Total Voting Rights | National Grid PLC | RNS |
| 01/05/18 | | 08:00:04 | 1 May 2018 | | | Agreement for potential sale of 25% of Cadent Gas | National Grid PLC | RNS |
| 13/04/18 | | 17:45:11 | 13 Apr 2018 | | | Appointment of Joint Corporate Broker | National Grid PLC | RNS |
| 12/04/18 | | 08:00:04 | 12 Apr 2018 | | | National Grid Update to 2017/18 Technical Guidance | National Grid PLC | RNS |
| 10/04/18 | | 15:33:53 | 10 Apr 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 05/04/18 | | 16:47:39 | 5 Apr 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 03/04/18 | | 17:52:50 | 3 Apr 2018 | | | Total Voting Rights | National Grid PLC | RNS |
| 26/03/18 | | 18:17:58 | 26 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 23/03/18 | | 17:29:59 | 23 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 22/03/18 | | 17:26:21 | 22 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 21/03/18 | | 17:42:04 | 21 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 20/03/18 | | 17:40:02 | 20 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 19/03/18 | | 17:40:49 | 19 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 19/03/18 | | 12:37:47 | 19 Mar 2018 | | | Director's Other Appointment | National Grid PLC | RNS |
| 19/03/18 | | 07:00:04 | 19 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 16/03/18 | | 07:00:04 | 16 Mar 2018 | | | NIMO three-year rate plan approved | National Grid PLC | RNS |
| 15/03/18 | | 17:31:42 | 15 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 14/03/18 | | 17:45:20 | 14 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 13/03/18 | | 17:48:46 | 13 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 12/03/18 | | 17:38:18 | 12 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
