| 19/08/13 | 14:39:04 | 19 Aug 2013 | | TR-1: Notification of major interest in shares | RNS |
| 09/08/13 | 17:59:26 | 9 Aug 2013 | | Director/PDMR Shareholding | RNS |
| 06/08/13 | 12:10:58 | 6 Aug 2013 | | Director/PDMR Shareholding | RNS |
| 02/08/13 | 10:30:02 | 2 Aug 2013 | | Director/PDMR Shareholding | RNS |
| 01/08/13 | 17:15:03 | 1 Aug 2013 | | Director/PDMR Shareholding | RNS |
| 31/07/13 | 17:54:21 | 31 Jul 2013 | | Director/PDMR Shareholding | RNS |
| 29/07/13 | 18:31:58 | 29 Jul 2013 | | Holding(s) in Company | RNS |
| 25/07/13 | 17:59:00 | 25 Jul 2013 | | Result of AGM | RNS |
| 25/07/13 | 08:00:09 | 25 Jul 2013 | | Interim Management Statement | RNS |
| 10/07/13 | 15:49:50 | 10 Jul 2013 | | Director/PDMR Shareholding | RNS |
| 01/07/13 | 17:42:19 | 1 Jul 2013 | | Director/PDMR Shareholding | RNS |
| 18/06/13 | 12:01:02 | 18 Jun 2013 | | Annual Financial Report | RNS |
| 13/06/13 | 11:59:05 | 13 Jun 2013 | | Director/PDMR Shareholding | RNS |
| 04/06/13 | 08:00:11 | 4 Jun 2013 | | Director/PDMR Shareholding | RNS |
| 23/05/13 | 08:00:32 | 23 May 2013 | | Final Results | RNS |
| 14/05/13 | 10:09:27 | 14 May 2013 | | Director/PDMR Shareholding | RNS |
| 01/05/13 | 12:01:45 | 1 May 2013 | | Holding(s) in Company | RNS |
| 30/04/13 | 11:09:02 | 30 Apr 2013 | | Blocklisting Interim Review | RNS |
| 16/04/13 | 12:16:07 | 16 Apr 2013 | | Holding(s) in Company | RNS |
| 11/04/13 | 13:33:25 | 11 Apr 2013 | | Director/PDMR Shareholding | RNS |
| 28/03/13 | 07:02:20 | 28 Mar 2013 | | Trading Statement | RNS |
| 25/03/13 | 08:55:55 | 25 Mar 2013 | | Holding(s) in Company | RNS |
| 21/03/13 | 07:00:17 | 21 Mar 2013 | | OptaSense signs follow-on contracts with Shell | RNS |
| 14/03/13 | 14:51:16 | 14 Mar 2013 | | Holding(s) in Company | RNS |
| 13/03/13 | 14:29:35 | 13 Mar 2013 | | Director/PDMR Shareholding | RNS |
| 20/02/13 | 15:55:02 | 20 Feb 2013 | | Director/PDMR Shareholding | RNS |
| 18/02/13 | 15:14:40 | 18 Feb 2013 | | Director/PDMR Shareholding | RNS |
| 12/02/13 | 14:34:28 | 12 Feb 2013 | | Director/PDMR Shareholding | RNS |
| 05/02/13 | 07:00:53 | 5 Feb 2013 | | Interim Management Statement | RNS |
| 01/02/13 | 07:00:07 | 1 Feb 2013 | | LTPA Contract Renewal | RNS |
| 10/01/13 | 15:32:03 | 10 Jan 2013 | | Director/PDMR Shareholding | RNS |
