| 07/08/15 | | 18:02:24 | 7 Aug 2015 | | | Holding(s) in Company | National Grid PLC | RNS |
| 07/08/15 | | 17:00:03 | 7 Aug 2015 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 06/08/15 | | 11:30:05 | 6 Aug 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 05/08/15 | | 18:37:23 | 5 Aug 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 05/08/15 | | 17:00:02 | 5 Aug 2015 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 05/08/15 | | 17:00:02 | 5 Aug 2015 | | | Total Voting Rights | National Grid PLC | RNS |
| 05/08/15 | | 15:00:09 | 5 Aug 2015 | | | Holding(s) in Company | National Grid PLC | RNS |
| 04/08/15 | | 18:23:13 | 4 Aug 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 04/08/15 | | 10:00:02 | 4 Aug 2015 | | | National Grid plc - Scrip Dividend | National Grid PLC | RNS |
| 03/08/15 | | 13:00:06 | 3 Aug 2015 | | | Total Voting Rights | National Grid PLC | RNS |
| 31/07/15 | | 18:18:09 | 31 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 30/07/15 | | 18:29:57 | 30 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 30/07/15 | | 17:00:03 | 30 Jul 2015 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 29/07/15 | | 18:19:28 | 29 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 28/07/15 | | 18:18:31 | 28 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 27/07/15 | | 18:25:21 | 27 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 24/07/15 | | 16:00:09 | 24 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 21/07/15 | | 18:40:00 | 21 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 21/07/15 | | 17:00:04 | 21 Jul 2015 | | | Result of AGM | National Grid PLC | RNS |
| 20/07/15 | | 18:20:33 | 20 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 17/07/15 | | 18:27:32 | 17 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 16/07/15 | | 18:34:46 | 16 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 15/07/15 | | 18:38:50 | 15 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 14/07/15 | | 18:10:13 | 14 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 13/07/15 | | 18:27:13 | 13 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 10/07/15 | | 18:12:51 | 10 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 10/07/15 | | 15:26:12 | 10 Jul 2015 | | | National Grid News Update | National Grid PLC | RNS |
| 09/07/15 | | 18:33:50 | 9 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 08/07/15 | | 18:25:46 | 8 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 07/07/15 | | 18:20:20 | 7 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 07/07/15 | | 17:00:04 | 7 Jul 2015 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 07/07/15 | | 08:00:14 | 7 Jul 2015 | | | Commencement of share buy-back programme | National Grid PLC | RNS |
| 06/07/15 | | 18:18:45 | 6 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 03/07/15 | | 18:24:32 | 3 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 02/07/15 | | 18:09:57 | 2 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 01/07/15 | | 18:23:09 | 1 Jul 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 01/07/15 | | 13:58:17 | 1 Jul 2015 | | | Total Voting Rights | National Grid PLC | RNS |
| 30/06/15 | | 18:44:27 | 30 Jun 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 29/06/15 | | 18:29:52 | 29 Jun 2015 | | | Transaction in Own Shares | National Grid PLC | RNS |
| 29/06/15 | | 17:00:04 | 29 Jun 2015 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 29/06/15 | | 11:30:20 | 29 Jun 2015 | | | Commencement of share buy-back programme | National Grid PLC | RNS |
| 16/06/15 | | 17:00:02 | 16 Jun 2015 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 15/06/15 | | 17:00:05 | 15 Jun 2015 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 11/06/15 | | 14:00:05 | 11 Jun 2015 | | | Scrip Dividend for 2014/15 Final Dividend | National Grid PLC | RNS |
| 09/06/15 | | 17:28:58 | 9 Jun 2015 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 08/06/15 | | 17:34:54 | 8 Jun 2015 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 05/06/15 | | 12:00:06 | 5 Jun 2015 | | | Publication of Annual Report and Accounts | National Grid PLC | RNS |
| 01/06/15 | | 13:00:05 | 1 Jun 2015 | | | Total Voting Rights | National Grid PLC | RNS |
| 26/05/15 | | 17:00:15 | 26 May 2015 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 21/05/15 | | 08:00:33 | 21 May 2015 | | | Results for the year ended 31 March 2015 | National Grid PLC | RNS |
