Warburg Pincus will make a minority investment in Global Healthcare Exchange (GHX), according to a news release....By: McGuireWoods LLP. : Warburg Pincus will make a minority investment in Global Healthcare Exchange (GHX), according to a news release. GHX, based in Louisville, Colo., is a healthcare business and data automation company. Founded in 2000, the company operates a trading network that connects those who buy, sell and use products needed to deliver patient care. Warburg Pincus, based in New York, is a global private equity firm focused on growth investing.