| 09/09/13 | | 17:00:03 | 9 Sept 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 05/09/13 | | 17:00:01 | 5 Sept 2013 | | | Blocklisting Interim Review | National Grid PLC | RNS |
| 03/09/13 | | 17:00:03 | 3 Sept 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 02/09/13 | | 17:00:02 | 2 Sept 2013 | | | Total Voting Rights | National Grid PLC | RNS |
| 21/08/13 | | 18:28:20 | 21 Aug 2013 | | | Dividend Reinvestment | National Grid PLC | RNS |
| 21/08/13 | | 17:00:02 | 21 Aug 2013 | | | Total Voting Rights | National Grid PLC | RNS |
| 20/08/13 | | 15:00:03 | 20 Aug 2013 | | | Scrip Dividend | National Grid PLC | RNS |
| 07/08/13 | | 19:30:05 | 7 Aug 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 06/08/13 | | 08:00:10 | 6 Aug 2013 | | | Investor Seminar | National Grid PLC | RNS |
| 05/08/13 | | 19:16:01 | 5 Aug 2013 | | | Holding(s) in Company | National Grid PLC | RNS |
| 31/07/13 | | 18:37:28 | 31 Jul 2013 | | | Total Voting Rights | National Grid PLC | RNS |
| 30/07/13 | | 14:01:33 | 30 Jul 2013 | | | AGM Poll Results | National Grid PLC | RNS |
| 29/07/13 | | 17:00:02 | 29 Jul 2013 | | | Holding(s) in Company | National Grid PLC | RNS |
| 29/07/13 | | 08:00:08 | 29 Jul 2013 | | | IMS for the period 1 April 2013 to 28 July 2013 | National Grid PLC | RNS |
| 18/07/13 | | 17:46:16 | 18 Jul 2013 | | | Holding(s) in Company | National Grid PLC | RNS |
| 18/07/13 | | 16:40:55 | 18 Jul 2013 | | | Holding(s) in Company | National Grid PLC | RNS |
| 11/07/13 | | 17:00:03 | 11 Jul 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 09/07/13 | | 17:00:05 | 9 Jul 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 01/07/13 | | 16:59:32 | 1 Jul 2013 | | | Total Voting Rights | National Grid PLC | RNS |
| 01/07/13 | | 16:58:31 | 1 Jul 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 27/06/13 | | 17:51:43 | 27 Jun 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 18/06/13 | | 11:54:10 | 18 Jun 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 14/06/13 | | 10:00:03 | 14 Jun 2013 | | | Approval of downstate New York rate settlement | National Grid PLC | RNS |
| 13/06/13 | | 17:00:03 | 13 Jun 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 12/06/13 | | 17:06:54 | 12 Jun 2013 | | | Scrip Dividend for 2012/13 Final Dividend | National Grid PLC | RNS |
| 11/06/13 | | 17:00:05 | 11 Jun 2013 | | | Holding(s) in Company | National Grid PLC | RNS |
| 11/06/13 | | 11:46:37 | 11 Jun 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 10/06/13 | | 17:17:11 | 10 Jun 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 10/06/13 | | 12:00:01 | 10 Jun 2013 | | | Annual Financial Report | National Grid PLC | RNS |
| 03/06/13 | | 17:43:54 | 3 Jun 2013 | | | Total Voting Rights | National Grid PLC | RNS |
| 30/05/13 | | 11:32:36 | 30 May 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 16/05/13 | | 08:00:11 | 16 May 2013 | | | Results for the year ended 31 March 2013 | National Grid PLC | RNS |
| 08/05/13 | | 08:00:08 | 8 May 2013 | | | Share Incentive Plan- Monthly Update | National Grid PLC | RNS |
| 01/05/13 | | 17:00:04 | 1 May 2013 | | | Total Voting Rights | National Grid PLC | RNS |
| 25/04/13 | | 17:14:37 | 25 Apr 2013 | | | Notification of Board changes | National Grid PLC | RNS |
| 12/04/13 | | 17:00:02 | 12 Apr 2013 | | | Director's other Appointment | National Grid PLC | RNS |
| 08/04/13 | | 17:00:03 | 8 Apr 2013 | | | Director/PDMR Shareholding | National Grid PLC | RNS |
| 05/04/13 | | 17:25:04 | 5 Apr 2013 | | | Holding(s) in Company | National Grid PLC | RNS |
| 02/04/13 | | 17:00:02 | 2 Apr 2013 | | | Total Voting Rights | National Grid PLC | RNS |
| 28/03/13 | | 07:02:21 | 28 Mar 2013 | | | New Dividend Policy and Trading Update | National Grid PLC | RNS |
| 15/03/13 | | 09:00:03 | 15 Mar 2013 | | | Approval of upstate New York rate case settlement | National Grid PLC | RNS |
| 14/03/13 | | 16:27:26 | 14 Mar 2013 | | | Publication of Prospectus | National Grid PLC | RNS |
| 08/03/13 | | 16:00:02 | 8 Mar 2013 | | | SIP Operation | National Grid PLC | RNS |
| 07/03/13 | | 16:00:02 | 7 Mar 2013 | | | Director Declaration | National Grid PLC | RNS |
| 05/03/13 | | 16:00:03 | 5 Mar 2013 | | | Blocklisting Interim Review | National Grid PLC | RNS |
| 04/03/13 | | 09:00:02 | 4 Mar 2013 | | | Board appointment of Non-executive Director | National Grid PLC | RNS |
| 01/03/13 | | 16:31:06 | 1 Mar 2013 | | | Total Voting Rights | National Grid PLC | RNS |
| 28/02/13 | | 07:01:03 | 28 Feb 2013 | | | National Grid agrees RIIO price controls | National Grid PLC | RNS |
| 25/02/13 | | 16:08:31 | 25 Feb 2013 | | | Holding(s) in Company | National Grid PLC | RNS |
| 07/02/13 | | 16:25:01 | 7 Feb 2013 | | | SIP Monthly Notification | National Grid PLC | RNS |
