Press Releases

Onyx Pharmaceuticals Announces Second Quarter 2009 Financial Results Teleconference And Webcast

Emeryville, CA. — Jul. 29, 2009

Onyx Pharmaceuticals, Inc. (Nasdaq: ONXX) today announced that it will webcast a teleconference with management to provide a general business overview, as well as to discuss second quarter 2009 financial results, on Tuesday, August 4, 2009, at 5:00 p.m. Eastern Time (2:00 p.m. Pacific Time).   Financial results for the second quarter ended June 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 847-413-3362 and using the passcode 24875257.  A replay of the presentation will be available on the Onyx website or by dialing 630-652-3044 and using the passcode 24875257 approximately one hour after the teleconference concludes.  The replay will be available through September 4, 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.