Formed in 2010 from a merger of Oxford University and Imperial College spin-outs, this Oxfordshire firm has raised £55m to develop viruses that attack cancerous cells. In 2016 it signed a licensing deal with the US group Bristol-Myers Squibb for its pre-clinical stage treatment, NG-348. This deal — worth up to $936m in development, regulatory and sales-based milestones — helped turnover climb to £53.1m last year, thanks to a $50m upfront payment and a $15m payment when the treatment gained clinical trial approval. The firm is led by chief executive John Beadle, 53.

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Company details
Year2018
Rank2
CompanyPsiOxus
ActivityBiotechnology developer
LocationOxfordshire
Average 3 year sales growth311.67%
Latest sales £000s53,136
Staff54
Founded2006
Websitewww.psioxus.com

If applicable:

* supplied by company † annualised figure