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Sean Quinn and family

Quinn, 60, is the richest person from Northern Ireland in our list. He and his family have built their business from scratch into a multinational. By the mid-1980s, his Quinn Group had become Ireland’s second-largest cement maker. He bought pubs and hotels in the 1990s and has moved into insurance. With stakes in the Dublin bank Anglo Irish, the Quinn Group is worth £3 billion. See profile on page 88.