TowerBrook Capital Partners, which spun out of Soros Fund Management in 2004, has made 12 times its money, or $850m (€665m), after the sale of its remaining shares in US care services group WellCare Health Plans.

TowerBrook sold one million shares as part of the mid-2004 flotation, netting a 9.7-times return. After other block trades, last week's sale of its remaining 5.2 million shares in WellCare, about 13% of the company's issued capital, was more profitable, a source said.