Denis O'Brien

Denis O'Brien is an Irish billionaire businessman, and the founder and owner of Digicel and Communicorp. He was listed among the World's Top 200 Billionaires in 2015 and is also Ireland's richest native-born citizen. His business interests have also extended to aircraft leasing, utilities support (Actavo), petroleum, and football (soccer), being a minority shareholder of Celtic F.C. As former chairman of the Esat Digifone consortium, O'Brien was questioned by the Moriarty Tribunal, which investigated the awarding of a mobile phone licence to Esat, among other things.