Koch began his career as a consultant with the
Boston Consulting Group and later became a partner at
Bain & Company. After leaving Bain in 1983 he co-founded
L.E.K. Consulting with Iain Evans and James Lawrence. Koch retired from consulting when he was 39 to focus on writing and investing. After leaving consulting, Koch invested his own capital in more than 20 companies, many of which he founded or co-founded. Businesses owned or co-owned by Koch have included
Filofax,
Plymouth Gin, Belgo Restaurants,
Betfair,
iPulse,
FanDuel, Auto1, and Grind. He is known for applying his “Star Principle” to venture investments, focusing on high-growth niche leaders. Many of his investments have returned between 5× and 53× his original stakes, and over a multi-decade period his portfolio has reportedly achieved a compound annual return of about 22 percent. He has also been a non-executive director of several of these companies, including Filofax and Betfair, and has advised private equity firms such as Advent Limited (UK) and Brait SA, and the supermarket chain
Pick 'n Pay in South Africa. == Writing and ideas ==