| 04.12.2025 10:01 | COST | Holding(s) in Company | RNS |
| 01.12.2025 17:40 | COST | Holding(s) in Company | RNS |
| 26.11.2025 11:00 | COST | Director Declaration | RNS |
| 21.11.2025 09:24 | COST | Holding(s) in Company | RNS |
| 18.11.2025 17:01 | COST | Holding(s) in Company | RNS |
| 18.11.2025 12:42 | CLBX, ROQ, CVSG | TRADING UPDATES: CVS sales climb; Time to Act flags division progress | Alliance |
| 18.11.2025 07:00 | COST | Costain awarded contract extension with EDF | Reach |
| 14.11.2025 11:04 | COST | Director Declaration | RNS |
| 13.11.2025 14:20 | COST | Holding(s) in Company | RNS |
| 07.11.2025 10:18 | COST | Holding(s) in Company | RNS |
| 04.11.2025 16:25 | COST | Holding(s) in Company | RNS |
| 03.11.2025 13:30 | COST | Holding(s) in Company | RNS |
| 03.11.2025 11:59 | COST | Total Voting Rights | RNS |
| 30.10.2025 15:08 | COST | Holding(s) in Company | RNS |
| 28.10.2025 14:48 | COST | Holding(s) in Company | RNS |
| 27.10.2025 14:47 | COST | Holding(s) in Company | RNS |
| 24.10.2025 12:05 | COST | Holding(s) in Company | RNS |
| 21.10.2025 16:13 | COST | Holding(s) in Company | RNS |
| 20.10.2025 14:52 | ZEN, COST, EPP | EnergyPathways to apply for storage licences for MESH project | Alliance |
| 17.10.2025 17:07 | COST | Holding(s) in Company | RNS |
| 17.10.2025 11:26 | COST | Holding(s) in Company | RNS |
| 16.10.2025 12:53 | BRK, NFG, IOM | Strategic Equity Capital performance hampered by AIM exposure | Alliance |
| 14.10.2025 15:34 | COST | Additional Listing | RNS |
| 13.10.2025 11:42 | COST | Director/PDMR Shareholding | RNS |
| 13.10.2025 10:16 | MGNS, STB, NXR | SMALL-CAP WINNERS & LOSERS: Costain in deal win; Norcros buy green lit | Alliance |
| 13.10.2025 08:57 | MGNS, COST | Costain, Morgan Sindall, Hochtief to work on Sellafield nuclear site | Alliance |
| 13.10.2025 07:00 | COST | Costain Secures £1bn Programme With Sellafield | RNS |
| 10.10.2025 16:12 | SYS1, VANL, RGL | UK dividends calendar - next 7 days | Alliance |
| 06.10.2025 10:59 | COST | Holding(s) in Company | RNS |
| 18.09.2025 14:00 | COST | Scrip Dividend Reference Price | RNS |
| 04.09.2025 14:27 | TRI, SOLI, RFX | UK dividends calendar - next 7 days | Alliance |
| 01.09.2025 11:07 | COST | Total Voting Rights | RNS |
| 28.08.2025 09:05 | COST | Director/PDMR Shareholding | RNS |
| 22.08.2025 15:28 | COST | Holding(s) in Company | RNS |
| 22.08.2025 07:00 | COST | Director/PDMR Shareholding | RNS |
| 21.08.2025 10:49 | GOT, COST, BRK | SMALL-CAP WINNERS & LOSERS: Global Opportunities remains "risk averse" | Alliance |
| 21.08.2025 09:52 | BRK, COST, MGAM | LONDON BROKER RATINGS: RBC raises ConvaTec; Peel Hunt cuts Lancashire | Alliance |
| 20.08.2025 10:39 | KMR, COST, BOOT | SMALL-CAP WINNERS & LOSERS: Kenmare cuts dividend, swings to loss | Alliance |
| 20.08.2025 09:30 | COST | Costain revenue slumps due to HS2 delays and road project completions | Alliance |
| 20.08.2025 07:00 | COST | Half-year Report | RNS |
| 18.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 14.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 13.08.2025 16:37 | OSB, BGEO, KMR | UK earnings, trading statements calendar - next 7 days | Alliance |
| 13.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 12.08.2025 09:07 | COST | Holding(s) in Company | RNS |
| 12.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 11.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 08.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 07.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 06.08.2025 17:23 | COST | Holding(s) in Company | RNS |
| 06.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 05.08.2025 14:39 | COST | Holding(s) in Company | RNS |
| 05.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 04.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 01.08.2025 10:47 | COST | Holding(s) in Company | RNS |
| 01.08.2025 10:00 | COST | Total Voting Rights | RNS |
| 01.08.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 31.07.2025 10:40 | COST | Holding(s) in Company | RNS |
| 31.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 30.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 29.07.2025 15:03 | COST | Holding(s) in Company | RNS |
| 29.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 29.07.2025 07:00 | COST | Investor Presentation via Investor Meet Company | RNS |
| 28.07.2025 14:11 | COST | Holding(s) in Company | RNS |
| 28.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 25.07.2025 14:25 | COST | Holding(s) in Company | RNS |
| 25.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 24.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 23.07.2025 11:03 | COST | Holding(s) in Company | RNS |
| 23.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 22.07.2025 10:41 | COST | Holding(s) in Company | RNS |
| 22.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 21.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 18.07.2025 17:04 | COST | Holding(s) in Company | RNS |
| 18.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
