Rathgar-based David Power (69) is the "Power" in Paddy Power. He owns 3.86m shares which are now worth about €510m. Investors can't get enough of Paddy Power, especially with the potential of dominating online gambling through its €12bn merger with rival Betfair.
Shares have risen 60pc in the last 12 months. Share sales and dividends have added another €33m and there are other assets including real estate in the UK.