Transaction in Own Shares

RNS Number : 1912H

National Grid PLC

08 March 2018

8 March 2018

National Grid plc ("National Grid")

ISIN Code: GB00BDR05C01

Transaction in Own Shares

National Grid announces that it has purchased the following number of its ordinary shares of 12^204/473p each on the London Stock Exchange from Barclays Capital Securities Limited ("Barclays") as part of its buy-back programme announced on 14 February 2018. The purpose of the programme is, as previously announced, to reduce the share capital of the Company as part of its management of the dilution resulting from the take-up of its scrip dividend.

Date of purchase:	8 March 2018
Number of Ordinary shares of 12^204/473p each purchased:	40,173
Highest price paid per share (pence):	788.1612
Lowest price paid per share (pence):	788.1612
Volume weighted average price paid per share:	788.1612

National Grid intends to hold the purchased shares in treasury. Following the purchase of these shares, National Grid holds 272,628,081 of its ordinary shares in treasury and has 3,365,119,746 ordinary shares in issue (excluding treasury shares).

A schedule of individual trades carried out by Barclays (BARCGBN1) as principal in connection with the above purchases on 8 March 2018 is set out below.

Schedule of purchases - aggregate information

Trading venue	Volume weighted average price (pence per share)	Aggregated volume
BATS Europe	778.5000	630
Chi-X Europe	775.6216	1,109
Turquoise	780.0000	592
London Stock Exchange	777.3807	37,842

Schedule of purchases - individual transactions

Number of shares purchased	Transaction price (pence per share)	Time of transaction (including time zone)	Trading venue	Transaction reference number
125	777.00	08:00:31	London Stock Exchange	606179795953011000
1247	779.30	08:01:13	London Stock Exchange	592106045505554000
424	779.30	08:01:13	London Stock Exchange	592106045505554000
92	779.30	08:01:13	London Stock Exchange	606179795953013000
408	777.80	08:01:34	London Stock Exchange	592106045505555000
824	777.80	08:01:34	London Stock Exchange	592106045505555000
752	777.00	08:03:15	London Stock Exchange	592106045505561000
94	777.00	08:03:15	London Stock Exchange	592106045505561000
404	776.90	08:03:15	London Stock Exchange	606179795953020000
268	775.80	08:04:00	London Stock Exchange	592106045505563000
734	775.80	08:04:00	London Stock Exchange	592106045505563000
268	775.80	08:04:00	London Stock Exchange	592106045505563000
726	775.00	08:04:50	Chi-X Europe	592106045505565000
1603	777.60	08:06:24	London Stock Exchange	606179795953030000
196	777.60	08:06:25	London Stock Exchange	606179795953030000
89	777.60	08:06:25	London Stock Exchange	606179795953030000
693	777.50	08:06:25	London Stock Exchange	592106045505572000
587	777.20	08:06:30	London Stock Exchange	592106045505572000
375	777.20	08:06:30	London Stock Exchange	592106045505572000
38	777.10	08:06:34	London Stock Exchange	606179795953031000
417	777.10	08:06:34	London Stock Exchange	606179795953031000
193	776.90	08:08:06	London Stock Exchange	606179795953037000
1185	776.90	08:08:06	London Stock Exchange	606179795953037000
1000	776.80	08:08:10	London Stock Exchange	592106045505579000
16	776.80	08:08:10	London Stock Exchange	592106045505579000
383	776.80	08:08:10	Chi-X Europe	592106045505579000
1279	775.60	08:09:11	London Stock Exchange	592106045505583000
17	775.60	08:09:11	London Stock Exchange	592106045505583000
13	775.60	08:09:11	London Stock Exchange	592106045505583000
173	775.50	08:09:11	London Stock Exchange	592106045505583000
1020	775.30	08:09:43	London Stock Exchange	592106045505585000
412	775.30	08:09:43	London Stock Exchange	606179795953042000
435	775.80	08:10:56	London Stock Exchange	592106045505591000
940	775.80	08:10:56	London Stock Exchange	592106045505591000
854	775.50	08:11:32	London Stock Exchange	592106045505594000
513	775.50	08:11:32	London Stock Exchange	592106045505594000
507	776.20	08:12:52	London Stock Exchange	606179795953055000
743	776.20	08:12:52	London Stock Exchange	606179795953055000
687	776.20	08:12:54	London Stock Exchange	592106045505600000
435	775.90	08:13:35	London Stock Exchange	592106045505604000
368	775.90	08:13:35	London Stock Exchange	592106045505604000
220	775.90	08:13:35	London Stock Exchange	592106045505604000
481	775.90	08:13:35	London Stock Exchange	592106045505604000
1193	776.20	08:15:37	London Stock Exchange	592106045505614000
4	776.20	08:15:37	London Stock Exchange	592106045505614000
747	776.10	08:15:37	London Stock Exchange	592106045505614000
276	776.10	08:15:37	London Stock Exchange	592106045505614000
304	776.10	08:15:37	London Stock Exchange	592106045505614000
139	776.10	08:15:37	London Stock Exchange	592106045505614000
15	776.10	08:15:37	London Stock Exchange	606179795953069000
1032	776.90	08:17:10	London Stock Exchange	592106045505622000
927	776.80	08:17:11	London Stock Exchange	606179795953075000
1467	777.10	08:17:42	London Stock Exchange	592106045505624000
512	777.00	08:17:51	London Stock Exchange	592106045505625000
375	777.00	08:17:51	London Stock Exchange	592106045505625000
1076	778.00	08:18:32	London Stock Exchange	592106045505628000
431	777.90	08:18:40	London Stock Exchange	606179795953081000
1054	778.50	08:20:04	London Stock Exchange	592106045505633000
400	778.50	08:20:04	BATS Europe	592106045505633000
230	778.50	08:20:04	BATS Europe	592106045505633000
319	779.70	08:22:05	London Stock Exchange	592106045505641000
574	779.70	08:22:05	London Stock Exchange	592106045505641000
977	779.70	08:22:05	London Stock Exchange	592106045505641000
550	779.70	08:22:05	London Stock Exchange	592106045505641000
124	779.70	08:22:05	London Stock Exchange	592106045505641000
690	779.60	08:22:32	London Stock Exchange	606179795953095000
780	780.00	08:22:57	London Stock Exchange	606179795953096000
500	780.00	08:25:08	London Stock Exchange	606179795953103000
592	780.00	08:25:08	Turquoise	606179795953103000
561	780.00	08:25:08	London Stock Exchange	606179795953103000
725	779.90	08:25:10	London Stock Exchange	606179795953104000
1192	780.00	08:30:36	London Stock Exchange	592106045505669000
169	780.00	08:31:33	London Stock Exchange	592106045505672000