SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Exelixis, Inc. (Nasdaq: EXEL) announced today that that it will hold a webcast today, May 28, 2009, from 8:00 a.m. ET / 5:00 a.m. PT to 9:00 a.m. ET / 6:00 a.m. PT. Exelixis management will discuss a new collaboration focused on the company’s PI3K program.
