-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, KyzaYFVz4mR2wtiB/caORorxFTzbMCvRp3BP0bRHknYULzAg7+UM3huHGnNDw6zo xs8HIsJ4KtYJtzxVGNdHtw== 0000950123-10-080372.txt : 20110222 0000950123-10-080372.hdr.sgml : 20110221 20100824183352 ACCESSION NUMBER: 0000950123-10-080372 CONFORMED SUBMISSION TYPE: CORRESP PUBLIC DOCUMENT COUNT: 2 FILED AS OF DATE: 20100824 FILER: COMPANY DATA: COMPANY CONFORMED NAME: ONYX PHARMACEUTICALS INC CENTRAL INDEX KEY: 0001012140 STANDARD INDUSTRIAL CLASSIFICATION: BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836] IRS NUMBER: 943154463 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: CORRESP BUSINESS ADDRESS: STREET 1: 2100 POWELL STREET CITY: EMERYVILLE STATE: CA ZIP: 94608 BUSINESS PHONE: 5105976500 MAIL ADDRESS: STREET 1: 2100 POWELL STREET CITY: EMERYVILLE STATE: CA ZIP: 94608 CORRESP 1 filename1.htm corresp
(COOLEY LOGO)
Michael E. Tenta
(650) 843-5636
mtenta@cooley.com
  VIA EDGAR
August 24, 2010
Securities and Exchange Commission
Attention:    Jim B. Rosenberg
Joel Parker
Vanessa Robertson
Suzanne Hayes
Karen Ubell
100 F Street, N.E.
Washington, D.C. 20549
Re:     Onyx Pharmaceuticals, Inc.
Form 10-K for Fiscal Year Ended December 31, 2009
Filed February 23, 2010
Definitive Proxy Statement filed April 9, 2010
File No. 000-28928
Ladies and Gentlemen:
     On behalf of Onyx Pharmaceuticals, Inc. (the “Company”), this letter is being submitted in response to comments received from the staff of the Commission (the “Staff”) by letter dated August 17, 2010, with respect to the Company’s Form 10-K for Fiscal Year Ended December 31, 2009 and Definitive Proxy Statement filed April 9, 2010.
     Please be advised that the Company currently expects that it will provide its response to the Staff’s comment letter on or before September 15, 2010 and will further advise the Staff if it becomes unable to do so.
     Please do not hesitate to contact me at (650) 843-5636 if you have any questions or would like any additional information regarding this matter.
         
Sincerely,
 
   
/s/ Michael E. Tenta      
Michael E. Tenta     
     
 
cc:     Matthew K. Fust
Executive Vice President and Chief Financial Officer

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