| 18th May 2015 11:50 am | RNS | Result of General Meeting and Issue of Equity | 
                                                                            
                                            | 14th May 2015 7:00 am | RNS | Directorate Change | 
                                                                            
                                            | 5th May 2015 7:01 am | RNS | Correction to Results of Placing | 
                                                                            
                                            | 1st May 2015 4:15 pm | RNS | Results of Placing | 
                                                                            
                                            | 1st May 2015 11:08 am | RNS | Proposed placing and Notice of General Meeting | 
                                                                            
                                            | 23rd Apr 2015 7:00 am | RNS | HORIZON AND TRANSGENOMIC SIGN OEM AGREEMENT | 
                                                                            
                                            | 20th Apr 2015 7:00 am | RNS | Horizon & Thermo Fisher Scientific Sign Agreement | 
                                                                            
                                            | 14th Apr 2015 7:07 am | RNS | Preliminary Results | 
                                                                            
                                            | 10th Apr 2015 3:30 pm | RNS | Additional Listing | 
                                                                            
                                            | 27th Mar 2015 8:29 am | RNS | Additional Listing | 
                                                                            
                                            | 25th Mar 2015 7:00 am | RNS | Horizon Discovery awarded AMSCI grant | 
                                                                            
                                            | 24th Mar 2015 7:00 am | RNS | Notice of Preliminary Results | 
                                                                            
                                            | 23rd Mar 2015 7:00 am | RNS | Horizon Discovery and ArcherDX Sign OEM Agreement | 
                                                                            
                                            | 18th Mar 2015 10:39 am | RNS | Additional Listing | 
                                                                            
                                            | 11th Mar 2015 7:00 am | RNS | Horizon Provides Genomic Standards To CRUK | 
                                                                            
                                            | 18th Feb 2015 7:00 am | RNS | Innovate UK funding award | 
                                                                            
                                            | 11th Feb 2015 4:27 pm | RNS | Additional Listing | 
                                                                            
                                            | 5th Feb 2015 12:21 pm | RNS | Additional Listing | 
                                                                            
                                            | 2nd Feb 2015 7:00 am | RNS | Horizon Discovery Selected as Core Facility | 
                                                                            
                                            | 27th Jan 2015 12:00 pm | RNS | Additional Listing | 
                                                                            
                                            | 23rd Jan 2015 4:46 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 19th Jan 2015 7:00 am | RNS | Revenues expected to be ahead of consensus by 7% | 
                                                                            
                                            | 15th Jan 2015 7:00 am | RNS | Holding(s) in Company | 
                                                                            
                                            | 8th Jan 2015 7:00 am | RNS | Acquisition of Haplogen Genomics GmbH | 
                                                                            
                                            | 30th Dec 2014 7:00 am | RNS | Horizon Discovery Group Signs Agreement for $810K | 
                                                                            
                                            | 22nd Dec 2014 4:49 pm | RNS | Additional Listing | 
                                                                            
                                            | 19th Dec 2014 6:23 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 8th Dec 2014 7:00 am | RNS | Launch of Gene-Engineered Bioproduction Cell Line | 
                                                                            
                                            | 26th Nov 2014 3:09 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 24th Nov 2014 7:00 am | RNS | Horizon Enter Agreement with Adarza BioSystems | 
                                                                            
                                            | 19th Nov 2014 12:26 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 17th Nov 2014 7:00 am | RNS | $750,000 contract win from top ten pharma | 
                                                                            
                                            | 3rd Nov 2014 7:00 am | RNS | Appoints Dr David Smoller as an Executive Director | 
                                                                            
                                            | 15th Oct 2014 7:00 am | RNS | Horizon CombinatoRx Wins Contract | 
                                                                            
                                            | 6th Oct 2014 3:14 pm | RNS | TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES | 
                                                                            
                                            | 6th Oct 2014 7:00 am | RNS | Co-Exclusive Commercial Agreement Signed | 
                                                                            
                                            | 29th Sep 2014 7:00 am | RNS | Acquires Sage Labs Inc. for $48M (£29M) | 
                                                                            
                                            | 25th Sep 2014 12:30 pm | RNS | Additional Listing | 
                                                                            
                                            | 25th Sep 2014 7:00 am | RNS | $1.2 million Master Services Agreement | 
                                                                            
                                            | 23rd Sep 2014 7:00 am | RNS | Interim Results for Six Months Ended 30 June 2014 |