Quintiles Transnational, a healthcare consulting company backed by Bain Capital, TPG, 3i Group and Temasek Holdings, has filed for a $600 million IPO. Based in Durham, NC, the company provides biopharmaceutical development services and commercial outsourcing services, positioning it at the intersection of the business services and healthcare industries. The company expects to use its net proceeds from the offering to repay debt and for general corporate purposes.