Electronic Access to Annual Meeting Materials

Onyx has implemented an electronic method for delivering annual meeting materials. Electronic access is quick, easy and convenient, while also being eco-friendly and cost effective compared to printed materials. While we will be switching to electronic delivery next year, we will be mailing printed materials in addition to providing online access during this transition year.

To access these materials, please visit:
http://ww3.ics.adp.com/streetlink/onxx

If you have any questions, please contact Investor Relations at (510) 597-6675.

Onyx's Annual Shareholder Meeting

Date:         Wednesday, May 14, 2008
Time:         10:00 am PT
Location:  Onyx Pharmaceuticals
                   2100 Powell Street 
                   Emeryville, CA 94608

For directions to our offices, please click here.