2009 Press Releases

Onyx Pharmaceuticals Announces First Quarter 2009 Financial Results Teleconference and Webcast


EMERYVILLE, Calif. — Apr. 28, 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 first quarter 2009 financial results, on Wednesday, May 06, 2009, at 5:00 p.m. Eastern Time (2:00 p.m. Pacific Time). Financial results for the first quarter ended March 31, 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 847-413-3238 and using the passcode 24308683. A replay of the presentation will be available on the Onyx website or by dialing 630-652-3044 and using the passcode 24308683 approximately one hour after the teleconference concludes. The replay will be available through June 05, 2009.

About Onyx Pharmaceuticals, Inc.
Onyx Pharmaceuticals, Inc. is a biopharmaceutical company committed to improving the lives of people with cancer by changing the way cancer is treated®. 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 non-small cell lung cancer, melanoma, breast cancer, and other cancers. For more information about Onyx, visit the company's website at www.onyx-pharm.com.

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