SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Exelixis, Inc. (Nasdaq:EXEL) today announced that Frances K. Heller will be joining the company as its Executive Vice President of Business Development. In this position, Ms. Heller will leverage more than 15 years of pharmaceutical and biopharmaceutical industry experience to lead business development activities for the company’s rapidly advancing pipeline of compounds for the treatment of cancer and other serious diseases.