| 24.12.2024 10:19 | COST | Steve Mogford External Appointment | RNS |
| 19.12.2024 07:00 | COST | Siemens and Costain JV wins HS2 Systems Contract | RNS |
| 04.12.2024 12:19 | COST | IN BRIEF: Costain wins new HS2 systems contract | Alliance |
| 04.12.2024 07:00 | COST | Costain Wins New HS2 Systems Contract | RNS |
| 02.12.2024 13:39 | COST | Total Voting Rights | RNS |
| 14.11.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 13.11.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 12.11.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 11.11.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 08.11.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 07.11.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 06.11.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 05.11.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 04.11.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 01.11.2024 09:41 | COST | Total Voting Rights | RNS |
| 01.11.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 31.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 30.10.2024 10:23 | COST | Director/PDMR Shareholding | RNS |
| 30.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 29.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 28.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 25.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 24.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 23.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 22.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 18.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 17.10.2024 07:00 | COST | Costain obtains LSE Green Economy Mark | Reach |
| 17.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 16.10.2024 12:46 | COST | Additional Listing | RNS |
| 16.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 15.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 14.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 11.10.2024 14:43 | COST | Director/PDMR Shareholding | RNS |
| 11.10.2024 13:54 | VANL, SYS1, SOM | UK dividends calendar - next 7 days | Alliance |
| 11.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 10.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 09.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 08.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 07.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 03.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 02.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 01.10.2024 13:01 | COST | Total Voting Rights | RNS |
| 01.10.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 30.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 27.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 26.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 25.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 24.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 23.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 20.09.2024 12:17 | INVP, COST | IN BRIEF: Costain Group says first tranche of buyback completed | Alliance |
| 20.09.2024 07:05 | COST | Share Buyback Programme Update | RNS |
| 20.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 19.09.2024 11:53 | COST | Scrip Dividend Reference Price | RNS |
| 19.09.2024 11:44 | COST | Holding(s) in Company | RNS |
| 19.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 18.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 17.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 16.09.2024 17:06 | COST | Holding(s) in Company | RNS |
| 16.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 11.09.2024 13:39 | COST | UPDATE: Costain says ASGC stake sale shows high demand for shares | Alliance |
| 11.09.2024 11:57 | COST | IN BRIEF: ASGC Construction sells entire 15% share holding in Costain | Alliance |
| 11.09.2024 07:00 | COST | Result of placing in Costain Group Plc | RNS |
| 11.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 10.09.2024 21:14 | COST | IN BRIEF: ASGC Construction to sell 11% stake in Costain via placing | Alliance |
| 10.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 09.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 06.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 05.09.2024 16:37 | TRI, UPR, TTG | UK dividends calendar - next 7 days | Alliance |
| 05.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 04.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 03.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 02.09.2024 07:05 | COST | Total Voting Rights | RNS |
| 02.09.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 29.08.2024 07:00 | COST | Transaction in Own Shares | RNS |
| 28.08.2024 07:00 | COST | Transaction in Own Shares | RNS |
