William C. Sonneborn

Senior Director at the International Finance Corporation
B’92

William Sonneborn is Senior Director at the International Finance Corporation, former president of EIG. Prior to joining EIG, he was a partner of Kohlberg Kravis Roberts & Co. and a member of KKR’s Management Committee. Sonneborn served as CEO of KKR Asset Management (the public markets side of KKR), as well as CEO and director of KKR Financial Corporation (NYSE: KFN), a publicly traded specialty finance firm. He also sat on the board of Nephila Capital, a $10 billion Bermuda-based hedge fund in which KKR purchased a stake in 2013.

Prior to joining KKR, Sonneborn was with The TCW Group, Inc., most recently as president and chief operating officer. Previously, he worked at Goldman, Sachs & Co. in New York and Hong Kong, where he focused on mergers and acquisitions for financial institutions. Sonneborn graduated with honors from Georgetown University. He is involved with a variety of non-profit organizations, serving as a director or trustee of the Georgetown University McDonough School of Business, Lucile Packard Foundation for Children’s Health at Stanford University, and the San Francisco Zoo.