Exhibit 99.1
SUMMARY
FORM 6-K
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549
Report of Foreign Issuer
Pursuant to Rule 13a – 16 or 15d – 16 of
The Securities Exchange Act of 1934
Announcements sent to the London Stock Exchange
National Grid plc, 1-3 Strand, London, WC2N 5EH, United Kingdom
Update — Routine announcements in the period from
2 June 2017 to 4 July 2017
| 04.07.17 | Transaction in own shares | |
| 03.07.17 | Total Voting Rights | |
| 03.07.17 | Transaction in own shares | |
| 30.06.17 | Transaction in own shares | |
| 29.06.17 | Transaction in own shares | |
| 29.06.17 | Director/PDMR Shareholding | |
| 28.06.17 | Transaction in own shares | |
| 27.06.17 | Transaction in own shares | |
| 26.06.17 | Transaction in own shares | |
| 23.06.17 | Transaction in own shares | |
| 22.06.17 | Transaction in own shares | |
| 21.06.17 | Transaction in own shares | |
| 21.06.17 | Director/PDMR Shareholding | |
| 20.06.17 | Transaction in own shares | |
| 20.06.17 | Director/PDMR Shareholding | |
| 19.06.17 | Transaction in own shares | |
| 16.06.17 | Transaction in own shares | |
| 15.06.17 | Transaction in own shares | |
| 15.06.17 | Director Declaration | |
| 14.06.17 | Transaction in own shares | |
| 13.06.17 | Transaction in own shares | |
| 13.06.17 | Director/PDMR Shareholding | |
| 12.06.17 | Transaction in own shares | |
| 09.06.17 | Transaction in own shares | |
| 08.06.17 | Transaction in own shares | |
| 07.06.17 | Transaction in own shares | |
| 06.06.17 | Transaction in own shares | |
| 06.06.17 | Holding in Company | |
| 05.06.17 | Transaction in own shares | |
| 02.06.17 | Transaction in own shares |
Note: During the period a ‘same day’ Form 6-K was issued in respect of the following National Grid plc announcements:
08.06.17 Scrip Dividend for 2016/17 Final Dividend
06.06.17 Publication of Annual Report and Accounts
02.06.17 Commencement of share buy-back programme
