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Last checked at 
3 Jun 2026 10:30
3 June 2026
Costain Group PLC
Transaction in own shares
Costain Group PLC ("Costain") announces that, in accordance with the terms of its share buyback programme (the "Programme") announced on 10 March 2026, it has purchased the following number of its ordinary shares of 1 pence each ("Ordinary Shares") on the London Stock Exchange through Panmure Liberum in the period from 27 May 2026 to 2 June 2026.
Date of Purchase | Number of ordinary shares purchased | Weighted average price per day (pence) | Highest price per share (pence) | Lowest price per share (pence) |
27 May 2026 | 50,000 | 193.27 | 198.00 | 191.00 |
28 May 2026 | 41,500 | 191.77 | 193.40 | 190.80 |
29 May 2026 | 46,000 | 194.34 | 195.00 | 192.60 |
01 June 2026 | 45,000 | 190.55 | 193.00 | 187.80 |
02 June 2026 | 42,983 | 192.56 | 193.40 | 190.60 |
The Company intends to cancel the purchased shares. The Company does not hold any ordinary shares in treasury.
Costain has now purchased 2,677,495 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 267,078,540 Ordinary Shares.
In accordance with Article 5(1)(b) of Market Abuse Regulation (EU) No 596/2014 (as it forms part of the law of the United Kingdom by virtue of the European Union (Withdrawal) Act 2018, as implemented, retained, amended, extended, re-enacted or otherwise given effect in the United Kingdom from 1 January 2021 and as amended or supplemented in the United Kingdom thereafter) a full breakdown of the individual trades made by Panmure Liberum on behalf of the Company as part of the Programme can be found at:
http://www.rns-pdf.londonstockexchange.com/rns/8486G_1-2026-6-3.pdf
Aggregate information:
Venue | Volume-weighted average price (pence per share) | Aggregated volume | Lowest price per share (pence per share) | Highest price per share (pence per share) |
BATE | 192.58 | 79,000 | 187.80 | 197.60 |
XLON | 192.50 | 115,983 | 188.00 | 197.60 |
CHIX | 192.56 | 21,000 | 188.40 | 197.60 |
TRQX | 192.55 | 9,500 | 188.60 | 198.00 |
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 |
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