Adaptive builds bespoke trading systems for financial clients ranging from investment banks to financial technology companies. Founded in 2012, it initially worked solely for one client, an investment bank, but now provides software to more than 30 customers from offices in London, Barcelona and Montreal. This helped 2017 turnover hit £15.2m. Co-founders and directors Matt Barrett, 36, Olivier Deheurles, 36, John Marks, 40, and Loic Roze, 37, plan to launch a New York operation later this year.