SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Exelixis, Inc. (Nasdaq:EXEL) will provide an update on its collaboration with Bristol-Myers Squibb Company for XL184 on Monday, June 21, 2010 before the markets open. The announcement will be followed by a live webcast at 5:00 a.m. PT/ 8:00 a.m. ET. The webcast may be accessed in the Event Calendar page under Investors at http://www.exelixis.com.