These two sons of the late Tony Ryan inherited his stake in Ryanair, though most of it was sold since the IPO in 1990. Wicklow-based entrepreneur Declan invests in start-ups such as Coindrum but has also had continued success building up or backing low-cost airlines across the world including Singapore-based Tiger Airways, Allegiant Air in the US. Another, Colombia's VivaAir, placed a $5bn order last year for 50 new Airbus jets.
The family's Irelandia Investments sold a 49pc stake in 2016, which was estimated to be worth €226m. The brothers also shared, along with other relatives, in a €42m windfall from a Mexican airline investment in the past year. Irelandia has also invested €4m in Aerdrone International, a drone leasing start-up. Property interests reportedly in Britain, Poland, Asia and Mexico, as well as commercial property in Dublin continue to deliver.
Shane is a successful bloodstock farmer, owning stud farms in Tipperary and Kentucky. He is also the new owner of the 600-acre Lyons Demesne estate in Kildare, having bought it from his brother and his late father's estate. He lives on Kilboy Estate in Tipperary which has been restored and upgraded.
The Tony Ryan Trust, meanwhile, founded in memory of their father, made donations of €4.7m in 2016 to a number of causes, including Barnardos, DCU and Social Entrepreneurs Ireland.