| 22/08/17 | | 17:00:01 | 22 Aug 2017 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 21/08/17 | | 18:19:08 | 21 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 21/08/17 | | 17:00:02 | 21 Aug 2017 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 18/08/17 | | 18:19:56 | 18 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 18/08/17 | | 17:23:54 | 18 Aug 2017 | | | Appointment of Joint Corporate Broker | National Grid PLC | RNS |
| 17/08/17 | | 18:32:04 | 17 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 16/08/17 | | 17:38:57 | 16 Aug 2017 | | | Total Voting Rights | National Grid PLC | RNS |
| 15/08/17 | | 10:00:02 | 15 Aug 2017 | | | Scrip Dividend | National Grid PLC | RNS |
| 14/08/17 | | 18:21:20 | 14 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 11/08/17 | | 18:13:55 | 11 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 10/08/17 | | 18:27:58 | 10 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 09/08/17 | | 18:31:58 | 9 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 08/08/17 | | 18:21:16 | 8 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 07/08/17 | | 18:12:47 | 7 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 04/08/17 | | 18:13:56 | 4 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 03/08/17 | | 18:14:45 | 3 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 02/08/17 | | 18:16:45 | 2 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 02/08/17 | | 17:00:01 | 2 Aug 2017 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 01/08/17 | | 18:19:01 | 1 Aug 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 01/08/17 | | 16:34:20 | 1 Aug 2017 | | | Total Voting Rights | National Grid PLC | RNS |
| 31/07/17 | | 15:34:37 | 31 Jul 2017 | | | AGM Results | National Grid PLC | RNS |
| 28/07/17 | | 18:22:48 | 28 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 27/07/17 | | 16:26:10 | 27 Jul 2017 | | | Publication of Annual Report - Group Company | National Grid PLC | RNS |
| 26/07/17 | | 18:34:54 | 26 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 25/07/17 | | 18:38:02 | 25 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 25/07/17 | | 16:29:16 | 25 Jul 2017 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 24/07/17 | | 18:53:44 | 24 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 21/07/17 | | 18:41:00 | 21 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 20/07/17 | | 18:25:19 | 20 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 19/07/17 | | 18:39:46 | 19 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 18/07/17 | | 18:29:22 | 18 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 17/07/17 | | 18:28:36 | 17 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 14/07/17 | | 18:23:25 | 14 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 13/07/17 | | 18:35:01 | 13 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 13/07/17 | | 13:37:18 | 13 Jul 2017 | | | Annual Report-Group Companies With Listed Debt | National Grid PLC | RNS |
| 12/07/17 | | 18:29:16 | 12 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 11/07/17 | | 18:21:05 | 11 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 10/07/17 | | 18:37:22 | 10 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 10/07/17 | | 17:00:01 | 10 Jul 2017 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 07/07/17 | | 18:18:17 | 7 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 06/07/17 | | 18:26:27 | 6 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 05/07/17 | | 18:49:17 | 5 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 04/07/17 | | 18:28:46 | 4 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 03/07/17 | | 18:24:21 | 3 Jul 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 03/07/17 | | 12:52:08 | 3 Jul 2017 | | | Total Voting Rights | National Grid PLC | RNS |
| 30/06/17 | | 18:16:16 | 30 Jun 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 29/06/17 | | 18:34:12 | 29 Jun 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 29/06/17 | | 17:00:01 | 29 Jun 2017 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 28/06/17 | | 18:26:39 | 28 Jun 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 27/06/17 | | 18:31:26 | 27 Jun 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
