| 11.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 10.07.2025 09:51 | COST | Holding(s) in Company | RNS |
| 10.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 09.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 08.07.2025 16:14 | COST | Holding(s) in Company | RNS |
| 08.07.2025 09:24 | COST | Holding(s) in Company | RNS |
| 08.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 07.07.2025 12:35 | COST | Holding(s) in Company | RNS |
| 07.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 04.07.2025 11:12 | COST | Holding(s) in Company | RNS |
| 04.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 03.07.2025 15:48 | COST | Holding(s) in Company | RNS |
| 03.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 02.07.2025 15:38 | COST | Total Voting Rights - Correction | RNS |
| 02.07.2025 08:37 | COST | Block listing Interim Review | RNS |
| 02.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 01.07.2025 14:33 | COST | Total Voting Rights | RNS |
| 01.07.2025 12:29 | COST | Holding(s) in Company | RNS |
| 01.07.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 30.06.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 27.06.2025 14:17 | COST | Holding(s) in Company | RNS |
| 27.06.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 26.06.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 25.06.2025 14:48 | COST | Holding(s) in Company | RNS |
| 25.06.2025 11:55 | COST | DIRECTOR/PDMR/PCA DEALING | RNS |
| 25.06.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 24.06.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 23.06.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 20.06.2025 07:00 | COST | Transaction in Own Shares | RNS |
| 19.06.2025 15:37 | COST | Holding(s) in Company | RNS |
| 16.06.2025 10:48 | COST | Costain announces share buyback amid pension progress, in line trading | Alliance |
| 16.06.2025 10:41 | TRD, COST | SMALL-CAP WINNERS: Triad swings to annual profit as revenue rises | Alliance |
| 16.06.2025 07:00 | COST | £10m Share Buyback Programme & H1 Trading Update | RNS |
| 09.06.2025 15:38 | COST | Holding(s) in Company | RNS |
| 09.06.2025 07:00 | COST | Heathrow Site Visit | RNS |
| 04.06.2025 12:17 | COST | Costain awarded Anglian Water contract extension | Reach |
| 04.06.2025 11:50 | COST | Holding(s) in Company | RNS |
| 02.06.2025 16:37 | COST | Total Voting Rights | RNS |
| 02.06.2025 15:45 | COST | Holding(s) in Company | RNS |
| 29.05.2025 12:19 | COST | Holding(s) in Company | RNS |
| 28.05.2025 07:00 | COST | Refinancing of Bank and Bonding Facilities | RNS |
| 27.05.2025 15:49 | COST | Additional Listing | RNS |
| 22.05.2025 14:05 | TPK, RKT, OTV2 | UK dividends calendar - next 7 days | Alliance |
| 22.05.2025 13:19 | COST | Holding(s) in Company | RNS |
| 19.05.2025 15:16 | COST | Holding(s) in Company | RNS |
| 19.05.2025 11:32 | COST | Holding(s) in Company | RNS |
| 15.05.2025 16:40 | COST | Result of AGM | RNS |
| 15.05.2025 15:18 | FTC, COST, STB | TRADING UPDATES: Secure Trust lending nears target; Costain in line | Alliance |
| 15.05.2025 07:00 | COST | AGM Trading Update | RNS |
| 08.05.2025 14:04 | UTG, SSON, STB | UK shareholder meetings calendar - next 7 days | Alliance |
| 07.05.2025 17:16 | COST | Holding(s) in Company | RNS |
| 06.05.2025 18:05 | COST | Holding(s) in Company | RNS |
| 01.05.2025 14:35 | COST | Total Voting Rights | RNS |
| 28.04.2025 12:32 | COST | Scrip Dividend Reference Price | RNS |
| 25.04.2025 09:28 | COST | Holding(s) in Company | RNS |
| 22.04.2025 14:40 | COST | Holding(s) in Company | RNS |
| 10.04.2025 14:39 | WEIR, UTG, TFIF | UK dividends calendar - next 7 days | Alliance |
| 09.04.2025 14:48 | COST | Director/PDMR Shareholding | RNS |
| 08.04.2025 10:47 | COST | Annual Financial Report | RNS |
| 02.04.2025 09:19 | COST | Additional Listing | RNS |
| 01.04.2025 13:34 | COST | Holding(s) in Company | RNS |
| 21.03.2025 09:26 | CVSG, CBG, TET | LONDON BROKER RATINGS: HSBC raises Sainsbury's; Shore likes Tullow | Alliance |
| 20.03.2025 10:28 | CREO, POLB, OMG | TRADING UPDATES: Costain wins deal; Focusrite expects revenue hike | Alliance |
| 20.03.2025 07:00 | COST | Costain awarded Urenco framework agreement | RNS |
| 11.03.2025 14:31 | COST | Costain confident in growth prospects as it doubles dividend for 2024 | Alliance |
| 11.03.2025 10:08 | HEAD, SYNT, COST | SMALL-CAP WINNERS & LOSERS: Care REIT backs buyout; Headlam sinks | Alliance |
| 11.03.2025 07:00 | COST | Costain FY 2024 | RNS |
| 04.03.2025 15:12 | SYNT, SUPR, TCAP | UK earnings, trading statements calendar - next 7 days | Alliance |
| 14.02.2025 10:19 | CDL, COST, PINE | SMALL-CAP WINNERS & LOSERS: Pinewood races higher amid deal win | Alliance |
| 14.02.2025 09:40 | BNZL, CCH, ULVR | LONDON BROKER RATINGS: Redburn likes Bunzl; Shore Capital cuts Spirax | Alliance |
| 10.02.2025 12:00 | COST | Investor Presentation via Investor Meet Company | RNS |
| 27.01.2025 09:55 | PDL, IGC, COST | SMALL-CAP WINNERS & LOSERS: Costain climbs; Petra returns some gains | Alliance |
| 27.01.2025 09:47 | COST | Costain expects to post 2024 profit in line with market expectations | Alliance |
| 27.01.2025 07:00 | COST | Trading Update with Strong Forward Work Position | RNS |
| 02.01.2025 11:13 | COST | Block listing Interim Review | RNS |
