Appointment of Joint Broker

Summit Therapeutics plc 
(‘Summit’ or the ’Company’)

Appointment of Joint Broker

Oxford, UK, and Cambridge, MA, US, 12 November 2018 – Summit Therapeutics plc (NASDAQ: SMMT, AIM: SUMM), a leader in new mechanism antibiotic innovation, announces that it has with immediate effect appointed Bryan Garnier & Co. Limited as its joint broker.  N+1 Singer remains joint broker and Cairn Financial Advisers remains the Company’s Nominated Adviser.

About Summit Therapeutics
Summit Therapeutics is a leader in antibiotic innovation. Our new mechanism antibiotics are designed to become the new standards of care for the benefit of patients, and create value for payors and healthcare providers. We are currently developing new mechanism antibiotics for C. difficile infection and gonorrhoea and are using our proprietary Discuva Platform to expand our pipeline. For more information, visit www.summitplc.com and follow us on Twitter @summitplc.

Contacts

Summit    
Glyn Edwards / Richard Pye (UK office) Tel: 44 (0)1235 443 951
Erik Ostrowski / Michelle Avery (US office)   +1 617 225 4455
     
Cairn Financial Advisers LLP (Nominated Adviser) Tel: +44 (0)20 7213 0880
Liam Murray / Tony Rawlinson    
     
N+1 Singer (Joint Broker) Tel: +44 (0)20 7496 3000
Aubrey Powell / Jen Boorer, Corporate Finance
Tom Salvesen, Corporate Broking
   
     
Bryan Garnier & Co Limited (Joint Broker) Tel: +44 (0)20 7332 2500
Phil Walker / Dominic Wilson    
     
MSL Group (US) Tel: +1 781 684 6557
Jon Siegal   [email protected]
     
Consilium Strategic Communications (UK) Tel: +44 (0)20 3709 5700
Mary-Jane Elliott / Jessica Hodgson /   [email protected]
Lindsey Neville    

-END-