| 07/05/13 | | 17:01:51 | 7 May 2013 | | | Re. Long Term Incentive Plan | Costain Group PLC | RNS |
| 30/04/13 | | 16:23:46 | 30 Apr 2013 | | | Total Voting Rights | Costain Group PLC | RNS |
| 25/04/13 | | 15:58:15 | 25 Apr 2013 | | | Statement re proposed merger | Costain Group PLC | RNS |
| 25/04/13 | | 08:00:52 | 25 Apr 2013 | | | Announcement re Irrevocables | Costain Group PLC | RNS |
| 24/04/13 | | 16:15:24 | 24 Apr 2013 | | | Re. Scrip Dividend | Costain Group PLC | RNS |
| 24/04/13 | | 11:52:33 | 24 Apr 2013 | | | Re. Kier Group announcement | Costain Group PLC | RNS |
| 15/04/13 | | 08:00:11 | 15 Apr 2013 | | | Form 8 (DD) Costain Group PLC | Costain Group PLC | RNS |
| 15/04/13 | | 08:00:11 | 15 Apr 2013 | | | Deferred Share Bonus Plan | Costain Group PLC | RNS |
| 15/04/13 | | 08:00:07 | 15 Apr 2013 | | | Costain joint ventures win two Crossrail contracts | Costain Group PLC | RNS |
| 11/04/13 | | 16:47:46 | 11 Apr 2013 | | | Form 8 (DD) - Costain Group plc | Costain Group PLC | RNS |
| 11/04/13 | | 16:46:03 | 11 Apr 2013 | | | Form 8 (DD) - Costain Group plc | Costain Group PLC | RNS |
| 11/04/13 | | 08:00:37 | 11 Apr 2013 | | | Rule 2.10 Announcement | Costain Group PLC | RNS |
| 11/04/13 | | 08:00:22 | 11 Apr 2013 | | | Re Contract | Costain Group PLC | RNS |
| 09/04/13 | | 08:00:10 | 9 Apr 2013 | | | Costain Group PLC Long Term Incentive Plan | Costain Group PLC | RNS |
| 05/04/13 | | 16:14:26 | 5 Apr 2013 | | | Public Dealing Disclosure | Costain Group PLC | RNS |
| 05/04/13 | | 09:21:03 | 5 Apr 2013 | | | Deferred Share Bonus Plan | Costain Group PLC | RNS |
| 05/04/13 | | 09:20:06 | 5 Apr 2013 | | | Director/PDMR Shareholding | Costain Group PLC | RNS |
| 28/03/13 | | 16:21:20 | 28 Mar 2013 | | | LTIP Listing Application | Costain Group PLC | RNS |
| 28/03/13 | | 16:17:52 | 28 Mar 2013 | | | Notice of AGM | Costain Group PLC | RNS |
| 27/03/13 | | 07:00:03 | 27 Mar 2013 | | | Recommended all-share merger | Costain Group PLC | RNS |
| 06/03/13 | | 07:00:12 | 6 Mar 2013 | | | Final Results | Costain Group PLC | RNS |
| 18/02/13 | | 07:00:10 | 18 Feb 2013 | | | Re Contract | Costain Group PLC | RNS |
| 09/01/13 | | 07:00:06 | 9 Jan 2013 | | | Re Contract | Costain Group PLC | RNS |
| 04/01/13 | | 07:00:04 | 4 Jan 2013 | | | Trading Update | Costain Group PLC | RNS |
