| 04/03/21 | | 13:40:01 | 4 Mar 2021 | | | Notice of Results | Costain Group PLC | RNS |
| 24/02/21 | | 13:30:01 | 24 Feb 2021 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 17/02/21 | | 07:00:10 | 17 Feb 2021 | | | Settlement Agreement relating to the A465 contract | Costain Group PLC | RNS |
| 27/01/21 | | 07:00:04 | 27 Jan 2021 | | | Board changes | Costain Group PLC | RNS |
| 22/01/21 | | 10:15:01 | 22 Jan 2021 | | | NOTIFICATION OF MAJOR HOLDINGS | Costain Group PLC | RNS |
| 05/01/21 | | 07:00:03 | 5 Jan 2021 | | | Year End Trading Update | Costain Group PLC | RNS |
| 04/01/21 | | 10:05:35 | 4 Jan 2021 | | | BLOCK LISTING SIX MONTHLY RETURN | Costain Group PLC | RNS |
| 01/12/20 | | 09:42:05 | 1 Dec 2020 | | | Long Term Incentive Plan Award | Costain Group PLC | RNS |
| 20/11/20 | | 07:00:04 | 20 Nov 2020 | | | Appointment of Chief Financial Officer | Costain Group PLC | RNS |
| 03/11/20 | | 16:14:06 | 3 Nov 2020 | | | Director/PDMR Shareholding | Costain Group PLC | RNS |
| 29/10/20 | | 07:10:11 | 29 Oct 2020 | | | Board Notification - External Directorship | Costain Group PLC | RNS |
| 07/10/20 | | 12:10:02 | 7 Oct 2020 | | | Long Term Incentive Plan Awards | Costain Group PLC | RNS |
| 05/10/20 | | 07:00:07 | 5 Oct 2020 | | | Directorate Change | Costain Group PLC | RNS |
| 24/09/20 | | 09:20:00 | 24 Sept 2020 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 14/09/20 | | 07:00:09 | 14 Sept 2020 | | | Results for the half year ended 30 June 2020 | Costain Group PLC | RNS |
| 09/09/20 | | 13:08:22 | 9 Sept 2020 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 03/09/20 | | 07:00:06 | 3 Sept 2020 | | | Update on the A465 contract | Costain Group PLC | RNS |
| 17/08/20 | | 07:00:07 | 17 Aug 2020 | | | Trading Update and Revised Date of Half Year | Costain Group PLC | RNS |
| 07/08/20 | | 12:07:26 | 7 Aug 2020 | | | Second Price Monitoring Extn | Costain Group PLC | RNS |
| 07/08/20 | | 12:02:27 | 7 Aug 2020 | | | Price Monitoring Extension | Costain Group PLC | RNS |
| 05/08/20 | | 14:09:13 | 5 Aug 2020 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 31/07/20 | | 07:05:06 | 31 Jul 2020 | | | Board Notification – External Directorship | Costain Group PLC | RNS |
| 14/07/20 | | 10:30:06 | 14 Jul 2020 | | | Costain awarded Cadent contract | Costain Group PLC | RNS |
| 01/07/20 | | 09:15:03 | 1 Jul 2020 | | | Block listing Interim Return | Costain Group PLC | RNS |
| 29/06/20 | | 07:00:08 | 29 Jun 2020 | | | Peterborough and Huntington Compressor Stations | Costain Group PLC | RNS |
| 19/06/20 | | 11:30:03 | 19 Jun 2020 | | | Result of AGM | Costain Group PLC | RNS |
| 19/06/20 | | 07:00:04 | 19 Jun 2020 | | | AGM trading update | Costain Group PLC | RNS |
| 15/06/20 | | 16:10:00 | 15 Jun 2020 | | | Director/PDMR Shareholding | Costain Group PLC | RNS |
| 10/06/20 | | 12:45:20 | 10 Jun 2020 | | | Director/PDMR Shareholding | Costain Group PLC | RNS |
| 09/06/20 | | 07:05:01 | 9 Jun 2020 | | | Board Notification – External Directorship | Costain Group PLC | RNS |
| 08/06/20 | | 07:00:06 | 8 Jun 2020 | | | Costain Appointed onto Strategic Pipeline Alliance | Costain Group PLC | RNS |
| 04/06/20 | | 16:36:17 | 4 Jun 2020 | | | Holding(s) in Company - Replacement | Costain Group PLC | RNS |
| 03/06/20 | | 15:35:22 | 3 Jun 2020 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 02/06/20 | | 15:38:24 | 2 Jun 2020 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 02/06/20 | | 15:31:02 | 2 Jun 2020 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 02/06/20 | | 12:07:46 | 2 Jun 2020 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 29/05/20 | | 12:00:05 | 29 May 2020 | | | Appointment of non-executive director | Costain Group PLC | RNS |
| 29/05/20 | | 11:34:05 | 29 May 2020 | | | Director/PDMR Shareholding | Costain Group PLC | RNS |
| 28/05/20 | | 17:49:20 | 28 May 2020 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 28/05/20 | | 07:00:04 | 28 May 2020 | | | Results of Capital Raising and General Meeting | Costain Group PLC | RNS |
| 18/05/20 | | 09:05:02 | 18 May 2020 | | | Notice of 2020 Annual General Meeting | Costain Group PLC | RNS |
| 07/05/20 | | 13:20:02 | 7 May 2020 | | | Publication of Prospectus | Costain Group PLC | RNS |
| 07/05/20 | | 10:42:01 | 7 May 2020 | | | Completion of bookbuild | Costain Group PLC | RNS |
| 07/05/20 | | 07:00:06 | 7 May 2020 | | | Proposed £100 million Capital Raising | Costain Group PLC | RNS |
| 27/04/20 | | 07:00:09 | 27 Apr 2020 | | | Smart Motorway Programme Alliance | Costain Group PLC | RNS |
| 15/04/20 | | 07:05:04 | 15 Apr 2020 | | | Update on Contracts | Costain Group PLC | RNS |
| 02/04/20 | | 10:38:21 | 2 Apr 2020 | | | Annual Report and Accounts | Costain Group PLC | RNS |
| 31/03/20 | | 08:00:06 | 31 Mar 2020 | | | Update on COVID-19 | Costain Group PLC | RNS |
| 25/03/20 | | 16:41:05 | 25 Mar 2020 | | | Second Price Monitoring Extn | Costain Group PLC | RNS |
| 25/03/20 | | 16:35:40 | 25 Mar 2020 | | | Price Monitoring Extension | Costain Group PLC | RNS |
