SOUTH SAN FRANCISCO, Calif., Sept. 6 /PRNewswire-FirstCall/ -- Exelixis, Inc. (Nasdaq: EXEL - News) announced today that Frank Karbe, senior vice president and chief financial officer of Exelixis, will present at the Bear Stearns 19th Annual Healthcare Conference at 3:30 p.m. (ET) / 12:30 p.m. (PT) on Tuesday, September 12, 2006.