George and Constantine Logothetis and family
Shipping, Property, Aviation
Rank 2017

Libra Group, a Greek shipping operation that has expanded into property, finance, hospitality, renewables and aviation, is owned by the Logothetis family, led by London brothers George, 42, and Constantine, 37. New York resident George became chief executive of family firm Lomar Shipping at just 19 before going on to run the group, while London-based Tory donor Constantine headed its diversification. Between 2008 and 2014 it purchased more than $7bn of assets.