2009 Press Releases

Onyx Pharmaceuticals Announces Third Quarter 2009 Financial Results Teleconference and Webcast

Emeryville, CA. — Oct. 27, 2009

Onyx Pharmaceuticals, Inc. (Nasdaq: ONXX) today announced that it will host a webcast and teleconference with management to provide a general business overview, as well as to discuss third quarter 2009 financial results, on Tuesday, November 3, 2009, at 5:00 p.m. Eastern Time (2:00 p.m. Pacific Time). Financial results for the third quarter ended September 30, 2009 will be released earlier that day.

Interested parties may access a live webcast of the presentation on the company’s website at:
http://www.onyx-pharm.com/view.cfm/32/Event-Calendar

or by dialing 847-619-6547 and using the passcode 25674242. A replay of the presentation will be available on the Onyx website or by dialing 630-652-3044 and using the passcode 25674242 approximately one hour after the teleconference concludes. The replay will be available through December 3, 2009.

About Onyx Pharmaceuticals, Inc.
Onyx Pharmaceuticals, Inc. is a biopharmaceutical company committed to improving the lives of people with cancer. The company, in collaboration with Bayer HealthCare Pharmaceuticals, Inc., is developing and marketing Nexavar®, a small molecule drug. Nexavar is currently approved for the treatment of liver cancer and advanced kidney cancer. Additionally, Nexavar is being investigated in several ongoing trials in a variety of tumor types. For more information about Onyx, visit the company's website at www.onyx-pharm.com.

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