2007 Press Releases

Onyx Pharmaceuticals Announces Fourth Quarter and Year-End 2006 Financial Results Teleconference and Webcast


EMERYVILLE, Calif. — Feb. 08, 2007

Onyx Pharmaceuticals, Inc. (Nasdaq: ONXX) today announced that it will webcast a teleconference with management to discuss fourth quarter and year-end 2006 financial results and provide a general business overview on Thursday, February 15, 2007, at 5:00 p.m. Eastern Time (2:00 p.m. Pacific Time). Financial results for the fourth quarter and year ended December 31, 2006 will be released earlier that day.

Interested parties may access a live webcast of the presentation at:
http://audioevent.mshow.com/322956

or by dialing 706-758-9355 and using the passcode 8490115. A replay of the presentation will be available on the Onyx website or by dialing 706-645-9291 and using the passcode 8490115 approximately one hour after the teleconference concludes. The replay will be available through March 15, 2007.

Onyx Pharmaceuticals, Inc. is a biopharmaceutical company developing innovative therapies that target the molecular mechanisms that cause cancer. The company is developing Nexavar®, a small molecule drug, with Bayer Pharmaceuticals Corporation. Nexavar has been approved for the treatment of advanced kidney cancer. For more information about Onyx's pipeline and activities, visit the company's web site at: www.onyx-pharm.com.

Nexavar® (sorafenib) tablets is a registered trademark of Bayer Pharmaceuticals Corporation.