2007 Press Releases

Onyx Pharmaceuticals Announces Third Quarter 2007 Financial Results Teleconference and Webcast


EMERYVILLE, CA — Oct. 25, 2007

Onyx Pharmaceuticals, Inc. (Nasdaq: ONXX) today announced that it will webcast a teleconference with management to discuss third quarter 2007 financial results and provide a general business overview on Tuesday, November 6, 2007, at 5:00 p.m. Eastern Time (2:00 p.m. Pacific Time). Financial results for the third quarter ended September 30, 2007 will be released earlier that day.

Interested parties may access a live webcast of the presentation at:
http://events.streamlogics.net/conferenceplus/onyx/event003/index.asp

or by dialing 847-413-3235 and using the passcode 19394894. A replay of the presentation will be available on the Onyx website or by dialing 630-652-3044 and using the passcode 19394894 approximately one hour after the teleconference concludes. The replay will be available through December 6, 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 is approved for the treatment of advanced kidney cancer in more than 50 countries. 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.