| 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 |
| 09/03/18 | | 17:42:52 | 9 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 08/03/18 | | 17:39:48 | 8 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 08/03/18 | | 16:00:02 | 8 Mar 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 07/03/18 | | 17:37:28 | 7 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 07/03/18 | | 07:05:04 | 7 Mar 2018 | | | Ofgem's RIIO-2 Framework Consultation | National Grid PLC | RNS |
| 05/03/18 | | 17:32:33 | 5 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 02/03/18 | | 18:08:27 | 2 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 01/03/18 | | 17:37:57 | 1 Mar 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 01/03/18 | | 12:06:16 | 1 Mar 2018 | | | Total Voting Rights | National Grid PLC | RNS |
| 28/02/18 | | 17:33:58 | 28 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 27/02/18 | | 17:39:32 | 27 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 26/02/18 | | 17:34:03 | 26 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 23/02/18 | | 17:26:50 | 23 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 23/02/18 | | 14:39:47 | 23 Feb 2018 | | | Holding(s) in Company | National Grid PLC | RNS |
| 22/02/18 | | 17:32:23 | 22 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 21/02/18 | | 17:38:22 | 21 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 20/02/18 | | 17:51:55 | 20 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 19/02/18 | | 18:05:17 | 19 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 16/02/18 | | 17:28:15 | 16 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 15/02/18 | | 17:40:45 | 15 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 14/02/18 | | 17:42:30 | 14 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 14/02/18 | | 09:57:10 | 14 Feb 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 13/02/18 | | 16:00:01 | 13 Feb 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 09/02/18 | | 16:00:01 | 9 Feb 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 02/02/18 | | 16:00:01 | 2 Feb 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 02/02/18 | | 07:00:03 | 2 Feb 2018 | | | National Grid provides update on US Tax Reform | National Grid PLC | RNS |
| 01/02/18 | | 12:21:56 | 1 Feb 2018 | | | Total Voting Rights | National Grid PLC | RNS |
| 23/01/18 | | 07:20:57 | 23 Jan 2018 | | | National Grid responds to Ofgem | National Grid PLC | RNS |
| 22/01/18 | | 07:00:03 | 22 Jan 2018 | | | NIMO three-year rate plan proposed | National Grid PLC | RNS |
| 16/01/18 | | 16:00:01 | 16 Jan 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 15/01/18 | | 17:27:53 | 15 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 12/01/18 | | 17:21:18 | 12 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 12/01/18 | | 16:00:01 | 12 Jan 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 11/01/18 | | 17:36:03 | 11 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 10/01/18 | | 17:30:32 | 10 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 10/01/18 | | 16:00:01 | 10 Jan 2018 | | | Total Voting Rights | National Grid PLC | RNS |
| 09/01/18 | | 17:49:03 | 9 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 09/01/18 | | 16:00:01 | 9 Jan 2018 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 09/01/18 | | 09:00:01 | 9 Jan 2018 | | | Scrip Dividend | National Grid PLC | RNS |
| 08/01/18 | | 17:52:12 | 8 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 05/01/18 | | 17:48:19 | 5 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 04/01/18 | | 17:46:14 | 4 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 03/01/18 | | 18:17:08 | 3 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 02/01/18 | | 17:54:19 | 2 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 02/01/18 | | 11:05:59 | 2 Jan 2018 | | | Total Voting Rights | National Grid PLC | RNS |
| 02/01/18 | | 07:00:04 | 2 Jan 2018 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 28/12/17 | | 17:14:29 | 28 Dec 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 27/12/17 | | 17:30:42 | 27 Dec 2017 | | | Transaction in Own Shares | National Grid PLC | RNS |
