Search the definitive guide to the richest 1,000 in Britain and Ireland
IRELAND
Barry O’Callaghan
RESULTS 2007
Ranking: 48
Worth: £186m (€282m)
Industry: Computers, publishing
The 37-year-old former financier has a 47% stake in Riverdeep, the Dublin-based supplier of e-learning that he heads. It is worth more than £179m, excluding borrowings. He has a string of other investments.
RESULTS 2006
Ranking: 36
Worth: £184m
Industry: Computers, publishing
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