SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Exelixis, Inc. (NASDAQ:EXEL) announced today that it will hold its Fifth Annual R&D Day on Wednesday, December 2, 2009 from 10:00 a.m. EST / 7:00 a.m. PST to 2:00 p.m. EST / 11:00 a.m. PST in New York. Exelixis management will discuss the company’s development pipeline, corporate strategy and financial outlook.