This company’s digital games ecommerce platform has grown to become the second-biggest in the world, with more than 7,500 titles. Founded in 2010 by chief executive Paul Sulyok, 49, the company now trades in 196 countries. Last year it launched a publishing label to help developers bring their own games to the market. The London firm’s high-profile backers include Eden Ventures, Michael Birch, co-founder of Bebo, and Brent Hoberman, who co-founded lastminute.com with Baroness Lane-Fox. Green Man’s sales hit £29.5m in 2015.