| 11/01/16 | | 07:00:05 | 11 Jan 2016 | | | Confirmation of Contract Award | Costain Group PLC | RNS |
| 07/01/16 | | 12:17:06 | 7 Jan 2016 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 06/01/16 | | 07:00:07 | 6 Jan 2016 | | | Trading Update | Costain Group PLC | RNS |
| 04/01/16 | | 08:55:18 | 4 Jan 2016 | | | Blocklisting Interim Review | Costain Group PLC | RNS |
| 24/12/15 | | 12:17:02 | 24 Dec 2015 | | | Director/PDMR Shareholding | Costain Group PLC | RNS |
| 22/12/15 | | 11:46:51 | 22 Dec 2015 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 22/12/15 | | 09:13:35 | 22 Dec 2015 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 17/12/15 | | 07:00:11 | 17 Dec 2015 | | | Re Contract | Costain Group PLC | RNS |
| 09/12/15 | | 11:22:10 | 9 Dec 2015 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 04/12/15 | | 13:26:13 | 4 Dec 2015 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 01/12/15 | | 09:24:44 | 1 Dec 2015 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 16/11/15 | | 07:00:08 | 16 Nov 2015 | | | Re: Directorate | Costain Group PLC | RNS |
| 11/11/15 | | 09:56:48 | 11 Nov 2015 | | | Blocklisting Interim Review | Costain Group PLC | RNS |
| 30/10/15 | | 10:01:49 | 30 Oct 2015 | | | Total Voting Rights | Costain Group PLC | RNS |
| 29/10/15 | | 09:42:33 | 29 Oct 2015 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 20/10/15 | | 14:03:06 | 20 Oct 2015 | | | 2015 Interim Dividend - Scrip Alternative | Costain Group PLC | RNS |
| 28/09/15 | | 12:09:12 | 28 Sept 2015 | | | Director/PDMR Shareholding | Costain Group PLC | RNS |
| 25/09/15 | | 12:34:08 | 25 Sept 2015 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 24/09/15 | | 11:35:12 | 24 Sept 2015 | | | Scrip Dividend Reference Price | Costain Group PLC | RNS |
| 15/09/15 | | 15:45:00 | 15 Sept 2015 | | | Transfer of Shares | Costain Group PLC | RNS |
| 14/09/15 | | 12:22:06 | 14 Sept 2015 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 11/09/15 | | 11:18:20 | 11 Sept 2015 | | | Board Change | Costain Group PLC | RNS |
| 11/09/15 | | 11:12:34 | 11 Sept 2015 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 24/08/15 | | 08:06:27 | 24 Aug 2015 | | | Re Contract | Costain Group PLC | RNS |
| 20/08/15 | | 08:00:28 | 20 Aug 2015 | | | Half Yearly Report | Costain Group PLC | RNS |
| 17/08/15 | | 08:00:13 | 17 Aug 2015 | | | Acquisition | Costain Group PLC | RNS |
| 28/07/15 | | 10:33:44 | 28 Jul 2015 | | | NED Appointment | Costain Group PLC | RNS |
| 22/07/15 | | 08:00:24 | 22 Jul 2015 | | | Re Contract | Costain Group PLC | RNS |
| 22/07/15 | | 08:00:20 | 22 Jul 2015 | | | Completion of Reorganisation of JV in Spain | Costain Group PLC | RNS |
| 01/07/15 | | 10:58:54 | 1 Jul 2015 | | | Blocklisting Interim Review | Costain Group PLC | RNS |
| 01/07/15 | | 08:00:31 | 1 Jul 2015 | | | Changes to JV in Spain | Costain Group PLC | RNS |
| 25/06/15 | | 08:00:10 | 25 Jun 2015 | | | Trading Update | Costain Group PLC | RNS |
| 05/06/15 | | 08:00:17 | 5 Jun 2015 | | | Business Briefing | Costain Group PLC | RNS |
| 03/06/15 | | 08:00:08 | 3 Jun 2015 | | | Re Contract | Costain Group PLC | RNS |
| 29/05/15 | | 10:17:53 | 29 May 2015 | | | Total Voting Rights and Capital | Costain Group PLC | RNS |
| 19/05/15 | | 11:24:22 | 19 May 2015 | | | Dividend - Scrip Alternative | Costain Group PLC | RNS |
| 12/05/15 | | 11:34:47 | 12 May 2015 | | | Director/PDMR Shareholding | Costain Group PLC | RNS |
| 08/05/15 | | 17:23:29 | 8 May 2015 | | | LTIP - Blocklisting Application - Correction | Costain Group PLC | RNS |
| 07/05/15 | | 12:11:05 | 7 May 2015 | | | Long Term Incentive Plan - Listing Application | Costain Group PLC | RNS |
| 06/05/15 | | 12:49:33 | 6 May 2015 | | | Result of AGM | Costain Group PLC | RNS |
| 06/05/15 | | 08:01:51 | 6 May 2015 | | | Annual General Meeting and Financial Calendar | Costain Group PLC | RNS |
| 30/04/15 | | 09:59:22 | 30 Apr 2015 | | | Total Voting Rights and Capital | Costain Group PLC | RNS |
| 23/04/15 | | 15:33:02 | 23 Apr 2015 | | | Scrip Dividend Reference Price | Costain Group PLC | RNS |
| 08/04/15 | | 13:25:40 | 8 Apr 2015 | | | Director/PDMR Shareholding | Costain Group PLC | RNS |
| 31/03/15 | | 12:16:26 | 31 Mar 2015 | | | Total Voting Rights | Costain Group PLC | RNS |
| 23/03/15 | | 07:00:16 | 23 Mar 2015 | | | Re Contract | Costain Group PLC | RNS |
| 20/03/15 | | 07:00:15 | 20 Mar 2015 | | | Notice of AGM and Annual Report and Accounts | Costain Group PLC | RNS |
| 17/03/15 | | 10:18:47 | 17 Mar 2015 | | | Holding(s) in Company | Costain Group PLC | RNS |
| 10/03/15 | | 10:11:50 | 10 Mar 2015 | | | Director/PDMR Shareholding | Costain Group PLC | RNS |
| 03/03/15 | | 14:39:33 | 3 Mar 2015 | | | Dividend Declaration | Costain Group PLC | RNS |
