SOUTH SAN FRANCISCO, Calif., May 3, 2012 (GLOBE NEWSWIRE) -- Five Prime Therapeutics, Inc. (FivePrime), a leader in the discovery and development of innovative biologics, announced today that it has promoted Aron Knickerbocker to the position of Senior Vice President and Chief Business Officer. Mr. Knickerbocker originally joined FivePrime in September 2009 as its Vice President, Business Development, to lead FivePrime’s business development and licensing activities.