Transaction in Own Shares

RNS Number : 6256A

National Grid PLC

02 January 2018

2 January 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 9 October 2017. The sole purpose of the programme is, as previously announced, to reduce the share capital of National Grid as part of the return of proceeds to shareholders following the sale of a majority interest in National Grid's UK gas distribution business.

Date of purchase:	29 December 2017
Number of Ordinary shares of 12^204/473p each purchased:	57,983
Highest price paid per share (pence):	871.6527
Lowest price paid per share (pence):	871.6527
Volume weighted average price paid per share:	871.6527

National Grid intends to hold the purchased shares in treasury. Following the purchase of these shares, National Grid holds 241,754,036 of its ordinary shares in treasury and has 3,375,816,089 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 29 December 2017 is set out below.

Schedule of purchases - aggregate information

Trading venue	Volume weighted average price (pence per share)	Aggregated volume
BATS Europe	869.9839	3,407
Chi-X Europe	869.8908	9,043
Turquoise	870.0000	362
London Stock Exchange	869.8251	45,171

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
854	869.10	08:00:24	London Stock Exchange	606284548693540000
99	869.10	08:00:24	London Stock Exchange	606284548693540000
555	869.10	08:00:44	London Stock Exchange	592210798247346000
514	869.10	08:00:44	London Stock Exchange	592210798247346000
345	869.10	08:00:44	London Stock Exchange	606284548693541000
73	869.10	08:01:02	London Stock Exchange	592210798247347000
993	869.10	08:02:02	London Stock Exchange	592210798247347000
125	869.10	08:02:02	London Stock Exchange	606284548693542000
226	869.10	08:02:02	London Stock Exchange	592210798247347000
1,048	869.10	08:02:02	London Stock Exchange	592210798247347000
824	869.10	08:02:02	London Stock Exchange	606284548693542000
901	868.90	08:02:02	London Stock Exchange	606284548693542000
50	868.90	08:02:02	BATS Europe	606284548693542000
1,174	870.00	08:04:20	London Stock Exchange	606284548693543000
230	870.00	08:35:10	BATS Europe	592210798247369000
375	870.00	08:35:10	BATS Europe	606284548693561000
210	870.00	08:35:12	London Stock Exchange	592210798247369000
284	870.00	08:35:12	London Stock Exchange	606284548693561000
965	870.00	08:35:21	London Stock Exchange	592210798247369000
1,280	870.00	08:35:21	London Stock Exchange	592210798247369000
317	870.00	08:35:21	BATS Europe	592210798247369000
511	870.00	08:35:21	Chi-X Europe	592210798247369000
100	869.90	08:35:21	London Stock Exchange	592210798247369000
870	869.90	08:35:21	London Stock Exchange	592210798247369000
1,302	870.00	08:35:21	London Stock Exchange	606284548693561000
1,020	870.00	08:35:21	London Stock Exchange	606284548693561000
362	870.00	08:35:21	Turquoise	606284548693561000
87	870.00	08:35:21	London Stock Exchange	606284548693561000
392	870.00	08:35:21	Chi-X Europe	606284548693561000
465	869.90	08:35:21	Chi-X Europe	606284548693561000
93	869.80	08:35:21	London Stock Exchange	592210798247369000
83	869.90	08:35:25	London Stock Exchange	592210798247369000
507	869.90	08:35:25	Chi-X Europe	606284548693561000
356	869.90	08:35:25	London Stock Exchange	606284548693561000
363	870.00	08:35:31	BATS Europe	606284548693561000
57	870.00	08:35:33	BATS Europe	606284548693561000
221	870.00	08:35:36	London Stock Exchange	606284548693561000
436	870.00	08:35:36	London Stock Exchange	606284548693561000
161	870.00	08:35:36	BATS Europe	606284548693561000
155	870.00	08:35:36	BATS Europe	606284548693561000
238	870.00	08:35:37	Chi-X Europe	606284548693561000
425	870.00	08:35:37	London Stock Exchange	606284548693561000
330	870.00	08:35:38	London Stock Exchange	606284548693561000
515	870.00	08:35:38	Chi-X Europe	592210798247369000
139	870.00	08:35:38	Chi-X Europe	606284548693561000
654	870.00	08:35:51	BATS Europe	606284548693561000
653	870.00	08:35:54	BATS Europe	592210798247370000
345	870.00	08:54:53	London Stock Exchange	592210798247379000
392	870.00	08:54:53	BATS Europe	606284548693570000
294	870.00	08:54:53	London Stock Exchange	592210798247379000
584	870.00	08:54:53	Chi-X Europe	592210798247379000
1,454	870.00	08:54:53	London Stock Exchange	592210798247379000
778	870.00	08:54:53	London Stock Exchange	592210798247379000
1,172	870.00	08:54:53	London Stock Exchange	592210798247379000
1,520	870.00	08:54:53	London Stock Exchange	592210798247379000
1,378	870.00	08:54:53	London Stock Exchange	606284548693570000
664	869.90	08:54:53	London Stock Exchange	592210798247379000
525	869.90	08:54:53	London Stock Exchange	592210798247379000
59	869.90	08:54:53	London Stock Exchange	592210798247379000
386	869.90	08:54:53	Chi-X Europe	606284548693570000
38	870.00	08:54:54	London Stock Exchange	592210798247379000
887	870.00	08:54:56	London Stock Exchange	592210798247379000
223	870.00	08:54:56	London Stock Exchange	592210798247379000
561	870.00	08:54:56	London Stock Exchange	606284548693570000
254	870.00	08:54:57	London Stock Exchange	606284548693570000
36	870.00	08:55:03	London Stock Exchange	606284548693570000
662	870.00	08:55:03	London Stock Exchange	592210798247379000
65	870.00	08:55:03	London Stock Exchange	606284548693570000
72	870.00	08:55:03	London Stock Exchange	592210798247379000
681	870.00	08:55:03	London Stock Exchange	606284548693570000
476	870.00	08:55:03	Chi-X Europe	606284548693570000
816	870.00	08:55:06	London Stock Exchange	606284548693570000
1,085	870.00	08:55:06	London Stock Exchange	592210798247379000
64	870.00	08:55:06	London Stock Exchange	606284548693570000
831	870.00	08:55:08	London Stock Exchange	592210798247379000
236	870.00	08:55:09	London Stock Exchange	592210798247379000
524	870.00	08:55:09	Chi-X Europe	592210798247379000
16	870.00	08:55:12	Chi-X Europe	606284548693570000
1,071	870.00	08:55:13	London Stock Exchange	592210798247379000
73	870.00	08:55:15	London Stock Exchange	606284548693570000
57	870.00	08:55:16	London Stock Exchange	606284548693570000
40	870.00	08:55:21	London Stock Exchange	606284548693570000
52	870.00	08:55:22	London Stock Exchange	606284548693570000
71	870.00	08:55:28	London Stock Exchange	606284548693570000
61	870.00	08:55:37	London Stock Exchange	606284548693570000
61	870.00	08:55:44	London Stock Exchange	606284548693570000
66	870.00	08:55:51	London Stock Exchange	606284548693570000
934	870.00	08:55:55	London Stock Exchange	592210798247379000
19	870.00	08:55:55	London Stock Exchange	606284548693570000
75	870.00	08:55:55	Chi-X Europe	592210798247379000
435	870.00	08:55:55	Chi-X Europe	592210798247379000
349	870.00	08:55:58	London Stock Exchange	592210798247379000
550	870.00	08:56:12	London Stock Exchange	592210798247379000
813	870.00	08:58:36	London Stock Exchange	592210798247380000
131	870.00	08:58:36	London Stock Exchange	592210798247380000
286	870.00	08:58:36	London Stock Exchange	592210798247380000
1,410	870.00	08:58:36	London Stock Exchange	606284548693571000
68	870.00	08:58:41	London Stock Exchange	606284548693571000
80	870.00	08:58:48	London Stock Exchange	606284548693571000
15	870.00	08:58:51	Chi-X Europe	606284548693571000
592	870.00	08:58:51	Chi-X Europe	606284548693571000
644	870.00	08:58:51	London Stock Exchange	606284548693571000
17	870.00	08:58:54	Chi-X Europe	606284548693571000
18	869.90	08:59:28	Chi-X Europe	592210798247381000
1,446	869.90	08:59:32	London Stock Exchange	592210798247381000
326	869.90	08:59:32	Chi-X Europe	592210798247381000
5	869.90	08:59:32	Chi-X Europe	592210798247381000
27	869.80	08:59:32	London Stock Exchange	592210798247381000
2	869.80	08:59:37	London Stock Exchange	592210798247381000
11	869.80	08:59:38	London Stock Exchange	592210798247381000
11	869.80	08:59:44	London Stock Exchange	592210798247381000
13	869.80	08:59:50	London Stock Exchange	592210798247381000
144	869.80	09:02:20	London Stock Exchange	592210798247382000
56	869.80	09:02:25	Chi-X Europe	592210798247382000
583	869.80	09:02:25	London Stock Exchange	592210798247382000
525	869.80	09:02:25	London Stock Exchange	592210798247382000
115	869.80	09:02:25	London Stock Exchange	592210798247382000
1,020	869.80	09:02:25	London Stock Exchange	606284548693573000
63	869.70	09:02:25	Chi-X Europe	606284548693573000
976	869.70	09:02:25	Chi-X Europe	606284548693573000
913	869.70	09:02:25	London Stock Exchange	592210798247382000
438	869.70	09:02:25	London Stock Exchange	606284548693573000
126	869.70	09:02:25	London Stock Exchange	606284548693573000
828	869.80	09:02:25	London Stock Exchange	606284548693573000
120	869.70	09:02:27	London Stock Exchange	592210798247382000
120	869.70	09:02:32	London Stock Exchange	592210798247382000
489	869.70	09:02:32	Chi-X Europe	592210798247382000
409	869.70	09:02:32	London Stock Exchange	592210798247382000
377	869.70	09:02:32	Chi-X Europe	606284548693573000
142	869.70	09:02:38	London Stock Exchange	592210798247382000
779	869.70	09:02:44	Chi-X Europe	592210798247382000
131	869.70	09:02:44	London Stock Exchange	592210798247382000
47	869.70	09:02:50	London Stock Exchange	592210798247382000
67	870.00	09:02:57	Chi-X Europe	592210798247382000
671	870.00	09:38:23	London Stock Exchange	592210798247398000