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Transaction in Own Shares - Costain Group PLC | RNS | Ticker

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Transaction in Own Shares

RNS Number : 7150T

Costain Group PLC

04 August 2025

4^th August 2025

Costain Group PLC

Transaction in own shares

Costain Group PLC ("Costain", "the Group" or "the Company") announces that, in accordance with the terms of its share buyback programme (the "Buyback Programme") announced on 16^th June 2025, it has purchased the following number of its ordinary shares of 1 pence each ("Ordinary Shares") on the London Stock Exchange through Panmure Liberum.

Date of Purchase	1^st August 2025
Number of Ordinary Shares purchased	166,244
Weighted average price per day (pence)	162.65
Highest price per share (pence)	165.00
Lowest price per share (pence)	160.80

The purchased Ordinary Shares will be cancelled. The Company does not hold any Ordinary Shares in treasury.

Costain has now purchased 4,705,012 Ordinary Shares in aggregate for cancellation under the Buyback Programme. Following settlement of the above purchases and cancellation of the purchased Ordinary Shares, the Group's total number of Ordinary Shares in issue will be 268,293,463 Ordinary Shares.

Details of Trades:

Aggregate information

Venue	Volume-weighted average price (p)	Aggregated volume	Lowest price per share (p)	Highest price per share (p)
XLON	162.67	104,254	161.00	165.00
BATE	162.60	50,717	160.80	164.80
CHIX	162.82	9,199	161.20	165.00
TRQX	161.94	2,074	161.20	162.40

Individual Transactions

In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 as it applies in the UK (the Market Abuse Regulation), the table below contains detailed information of the individual trades made by Panmure Liberum on behalf of Costain as part of the Buyback Programme.

Time of transaction	Number of shares purchased	Transaction price (pence per share)	Venue	Transaction reference no.
08:10:11	466	165.00	XLON	00041312515TRLO0
08:10:11	344	165.00	XLON	00041312514TRLO0
08:10:11	1511	165.00	XLON	00041312513TRLO0
08:13:32	1358	165.00	XLON	00041312610TRLO0
08:13:33	1354	165.00	XLON	00041312619TRLO0
08:13:33	1370	165.00	CHIX	00041312618TRLO0
08:14:31	1639	164.80	BATE	00041312632TRLO0
08:14:31	1023	164.80	XLON	00041312633TRLO0
08:17:24	644	164.60	BATE	00041312689TRLO0
08:20:03	1401	164.60	XLON	00041312777TRLO0
08:20:03	1881	164.60	BATE	00041312776TRLO0
08:35:41	1457	164.40	BATE	00041313261TRLO0
08:35:41	1634	164.40	XLON	00041313262TRLO0
08:36:53	1705	164.20	XLON	00041313315TRLO0
08:51:09	1209	163.80	XLON	00041313698TRLO0
08:51:09	1165	163.80	BATE	00041313697TRLO0
08:52:05	221	163.80	XLON	00041313713TRLO0
08:53:09	1075	163.80	XLON	00041313731TRLO0
09:00:08	1281	163.60	XLON	00041313923TRLO0
09:00:08	906	163.60	CHIX	00041313922TRLO0
09:23:08	929	163.80	XLON	00041314526TRLO0
09:26:59	1408	163.60	XLON	00041314633TRLO0
09:26:59	1892	163.60	XLON	00041314632TRLO0
09:26:59	1587	163.60	BATE	00041314631TRLO0
09:31:35	1440	163.40	BATE	00041314726TRLO0
09:53:06	442	163.20	BATE	00041315238TRLO0
09:53:06	748	163.40	XLON	00041315237TRLO0
09:53:06	179	163.40	XLON	00041315236TRLO0
09:54:09	1618	163.20	XLON	00041315249TRLO0
09:54:09	1216	163.20	BATE	00041315248TRLO0
09:57:51	1517	163.00	XLON	00041315342TRLO0
10:06:08	1323	163.20	XLON	00041315524TRLO0
10:17:45	208	162.80	XLON	00041315808TRLO0
10:17:45	1474	163.00	BATE	00041315806TRLO0
10:17:45	942	163.00	CHIX	00041315805TRLO0
10:17:45	1468	163.00	XLON	00041315807TRLO0
10:44:38	1429	163.20	XLON	00041316270TRLO0
10:51:15	1309	163.20	XLON	00041316429TRLO0
10:59:40	1500	163.00	XLON	00041316578TRLO0
10:59:40	775	163.00	BATE	00041316577TRLO0
10:59:40	687	163.00	BATE	00041316576TRLO0
10:59:45	943	162.80	XLON	00041316583TRLO0
10:59:45	1333	162.80	BATE	00041316581TRLO0
10:59:45	225	162.80	XLON	00041316582TRLO0
11:18:48	773	162.80	BATE	00041317016TRLO0
11:18:48	1192	162.80	XLON	00041317015TRLO0
11:23:51	1232	162.80	XLON	00041317129TRLO0
11:43:57	1369	162.60	XLON	00041317684TRLO0
11:43:57	1729	162.60	BATE	00041317682TRLO0
11:43:57	996	162.60	CHIX	00041317681TRLO0
11:43:57	1649	162.60	XLON	00041317683TRLO0
11:51:02	830	162.40	XLON	00041317836TRLO0
12:00:00	1063	162.60	XLON	00041318050TRLO0
12:00:00	1062	162.60	BATE	00041318049TRLO0
12:07:14	876	162.40	XLON	00041318247TRLO0
12:37:26	806	163.00	XLON	00041318872TRLO0
12:39:06	1366	162.80	XLON	00041318912TRLO0
12:39:06	1662	162.80	XLON	00041318911TRLO0
12:39:06	1381	162.80	BATE	00041318910TRLO0
12:39:20	811	162.60	BATE	00041318914TRLO0
13:28:17	1211	162.40	XLON	00041320132TRLO0
13:28:17	1210	162.40	CHIX	00041320131TRLO0
13:28:17	1669	162.40	BATE	00041320130TRLO0
13:28:47	841	162.40	XLON	00041320151TRLO0
13:28:47	193	162.40	XLON	00041320152TRLO0
13:28:47	1000	162.40	XLON	00041320150TRLO0
13:28:47	441	162.20	XLON	00041320148TRLO0
13:28:47	824	162.20	XLON	00041320149TRLO0
13:28:47	965	162.20	BATE	00041320147TRLO0
13:28:47	511	162.20	BATE	00041320146TRLO0
13:31:02	1366	162.20	XLON	00041320321TRLO0
13:31:02	474	162.20	XLON	00041320320TRLO0
13:31:28	1534	162.00	XLON	00041320329TRLO0
13:58:50	2238	162.20	XLON	00041321158TRLO0
13:58:50	1445	162.20	XLON	00041321157TRLO0
13:58:50	236	162.20	XLON	00041321156TRLO0
13:58:50	1090	162.00	BATE	00041321154TRLO0
13:58:50	1354	162.20	XLON	00041321155TRLO0
13:58:50	1510	162.20	BATE	00041321153TRLO0
13:59:02	115	162.00	TRQX	00041321165TRLO0
14:13:01	908	162.00	TRQX	00041321541TRLO0
14:13:01	115	162.00	TRQX	00041321540TRLO0
14:13:01	1659	162.00	XLON	00041321539TRLO0
14:13:01	1408	162.00	BATE	00041321538TRLO0
14:13:01	948	162.00	CHIX	00041321537TRLO0
14:19:54	60	162.00	XLON	00041321764TRLO0
14:19:54	753	162.00	XLON	00041321763TRLO0
14:24:44	376	162.00	XLON	00041321891TRLO0
14:24:44	820	162.00	XLON	00041321890TRLO0
14:24:44	90	162.00	XLON	00041321889TRLO0
14:27:47	1552	162.00	XLON	00041321925TRLO0
14:27:47	157	162.00	TRQX	00041321924TRLO0
14:27:47	1338	162.00	BATE	00041321923TRLO0
14:29:24	1305	161.80	XLON	00041322064TRLO0
14:29:24	868	161.80	BATE	00041322063TRLO0
14:29:24	550	161.80	BATE	00041322062TRLO0
14:32:00	1507	161.60	XLON	00041322244TRLO0
14:32:00	1800	161.60	XLON	00041322243TRLO0
14:32:00	1006	161.60	BATE	00041322242TRLO0
14:40:05	1740	161.20	BATE	00041322594TRLO0
14:40:05	1933	161.20	XLON	00041322596TRLO0
14:40:05	173	161.20	TRQX	00041322595TRLO0
14:40:32	1148	161.20	XLON	00041322607TRLO0
14:42:27	866	161.00	XLON	00041322675TRLO0
14:52:03	793	161.40	XLON	00041323036TRLO0
14:53:02	1986	161.20	XLON	00041323051TRLO0
14:53:02	1210	161.20	CHIX	00041323050TRLO0
14:58:05	1413	161.20	XLON	00041323293TRLO0
14:58:05	1157	161.40	XLON	00041323292TRLO0
14:58:05	117	161.20	TRQX	00041323291TRLO0
14:58:43	906	161.20	XLON	00041323310TRLO0
14:59:50	1129	161.00	BATE	00041323360TRLO0
14:59:50	930	160.80	BATE	00041323359TRLO0
14:59:50	1738	161.00	BATE	00041323358TRLO0
15:19:07	688	162.80	XLON	00041324209TRLO0
15:19:07	494	162.80	XLON	00041324208TRLO0
15:27:07	881	162.60	CHIX	00041324577TRLO0
15:27:08	793	162.80	XLON	00041324582TRLO0
15:27:08	400	162.80	XLON	00041324581TRLO0
15:27:08	371	162.80	XLON	00041324580TRLO0
15:27:08	130	162.60	CHIX	00041324579TRLO0
15:27:08	606	162.60	CHIX	00041324578TRLO0
15:27:57	1052	162.40	BATE	00041324606TRLO0
15:27:57	1141	162.40	XLON	00041324605TRLO0
15:29:28	1237	162.40	XLON	00041324668TRLO0
15:29:28	391	162.40	BATE	00041324667TRLO0
15:29:28	1188	162.40	BATE	00041324666TRLO0
15:37:14	344	162.60	BATE	00041325123TRLO0
15:37:14	446	162.60	BATE	00041325122TRLO0
15:37:31	132	162.20	TRQX	00041325130TRLO0
15:43:02	978	162.60	BATE	00041325301TRLO0
15:43:23	164	162.20	TRQX	00041325312TRLO0
15:43:23	1039	162.20	BATE	00041325310TRLO0
15:43:23	1561	162.20	XLON	00041325311TRLO0
15:43:23	589	162.20	BATE	00041325309TRLO0
15:44:40	1472	162.20	XLON	00041325373TRLO0
15:44:40	1156	162.20	BATE	00041325372TRLO0
15:47:41	895	162.60	XLON	00041325597TRLO0
15:47:41	627	162.60	XLON	00041325596TRLO0
15:47:41	474	162.60	XLON	00041325595TRLO0
15:47:41	476	162.60	XLON	00041325594TRLO0
15:47:41	1446	162.60	XLON	00041325593TRLO0
15:47:41	601	162.60	XLON	00041325592TRLO0
15:47:41	174	162.60	XLON	00041325591TRLO0
15:47:51	1307	162.60	XLON	00041325605TRLO0
15:47:51	3	162.60	XLON	00041325604TRLO0
15:48:50	939	162.40	BATE	00041325666TRLO0
15:48:54	1043	162.40	XLON	00041325677TRLO0
15:49:15	40	162.40	XLON	00041325707TRLO0
15:50:20	1063	162.40	XLON	00041325758TRLO0
15:52:26	46	162.40	TRQX	00041325822TRLO0
16:01:21	2004	162.20	XLON	00041326171TRLO0
16:01:21	58	162.20	TRQX	00041326170TRLO0
16:01:21	1206	162.20	BATE	00041326167TRLO0
16:01:21	1402	162.20	XLON	00041326169TRLO0
16:01:21	89	162.20	TRQX	00041326168TRLO0
16:01:29	1407	162.00	XLON	00041326190TRLO0
16:01:29	844	162.00	BATE	00041326189TRLO0
16:01:29	1	162.00	BATE	00041326188TRLO0
16:16:40	895	162.40	XLON	00041326856TRLO0
16:16:40	475	162.40	XLON	00041326855TRLO0
16:16:40	9	162.40	XLON	00041326854TRLO0
16:16:40	219	162.40	XLON	00041326853TRLO0
16:16:40	174	162.40	XLON	00041326852TRLO0
16:16:40	558	162.40	XLON	00041326851TRLO0
16:16:40	468	162.40	XLON	00041326850TRLO0
16:16:40	474	162.40	XLON	00041326849TRLO0
16:16:40	9	162.40	XLON	00041326848TRLO0
16:16:40	1354	162.40	XLON	00041326847TRLO0
16:16:40	1000	162.40	XLON	00041326846TRLO0
16:16:40	227	162.40	XLON	00041326845TRLO0
16:16:40	212	162.40	XLON	00041326844TRLO0
16:16:40	951	162.20	BATE	00041326843TRLO0
16:16:40	502	162.20	BATE	00041326842TRLO0
16:16:46	457	162.20	XLON	00041326859TRLO0
16:17:37	1143	162.20	BATE	00041326943TRLO0

Enquiries:

Investors and analysts

Matt Jones, Costain

Matt.Jones@costain.com

+44 (0) 7860 922 341

Financial media - Headland

Andy Rivett-Carnac

Charlie Twigg

costain@headlandconsultancy.com

+44 (0) 7968 997365

+44 (0) 7946 494568

Issuer name: Costain Group PLC

LEI: 213800PKIJBZ2EDTKC88

ISIN: GB00B64NSP76

Classification: 2.4. Acquisition or disposal of the issuer's own shares

Intermediary name: Panmure Liberum

Intermediary Code: PMURGB2LXXX

Timezone: BST

Currency: GBp

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END

POSPKDBNABKDKFK

TIDM	COST
Share Price	Loading...
Market Cap	Loading...

Date	4 Aug 2025
Time	07:00:06
Category	Capital structure
ID	7150T

TIDM	COST
Share Price	Loading...
Market Cap	Loading...

Date	4 Aug 2025
Time	07:00:06
Category	Capital structure
ID	7150T

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Transaction in Own Shares