Warburg Pincus LLC invests in private equity and debt across a variety of industries. The name emerged from the merger of the EM Warburg. and Lionel I Pincus companies. EM Warburg & Co. was founded in 1939 and acquired by Lionel I Pincus & Co. to form EM Warburg, Pincus, & Co. in 1966. The company raised its first energy-focused fund in 2014.