Stephen Shuttleworth replacing retiring Barry Davies as Mosaic CSO

17 November 2025

Privately-held UK oncology company Mosaic Therapeutics has announced the appointment of Stephen Shuttleworth as chief scientific officer (CSO).

Dr Shuttleworth, who replaces the retiring Barry Davies, has more than 30 years’ experience as a pharmaceutical scientist, senior executive, entrepreneur and investor. 

He has been a venture partner at Samsara BioCapital, Palo Alto, USA, since 2019, where his responsibilities include R&D due diligence, new company creation and C-suite level company leadership. 

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