The Horncastle-based family – who were ranked 140th last year – made £700 million by selling LinPac to Montagu Private Equity in 2003.
As reported, their fortune dropped £100 million between 2009 and 2010, but has remained stable in the past 12 months.
Michael is now a 50 per cent shareholder of Oak Ridge Hotels, which owns the Brackenborough Hotel, near Louth, and the Ashbourne, at North Killingholme.
Ranked at 178, with a fortune of £450 million, Ross fell out of the rankings in 2009 when his property venture, Kandahar, was badly hit by the financial crisis. It is now thought to be worth £230 million and Ross is reported to be ready to sell its assets.Ranked at 237, with £330 million in the coffers, is John Cook, 66, and his family. They own Bourne Leisure – which operates Thorpe Park, in Cleethorpes – and although their fortune is up £10 million in the past 12 months, they have fallen 23 places in the Rich List rankings
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