
Ranking: 8
Worth: £928m (1,406m)
Industry: Civil engineering
Soaring profits, expansion and property prices have seen the value of Co Antrim-based Lagan Holdings, owned by Kevin, 57, and his brother Michael, 51, leap this year. They are set for a £50m profit in 2006-07.
Ranking: 47
Worth: £148m
Industry: Civil engineering