UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

NOTICE OF EFFECTIVENESS

Effective Date: October 01, 2013
Accession Number: 0001193125-13-387189
Submission Type: POS AM
CIK: 0001012140
Company Name: ONYX PHARMACEUTICALS INC
File Number: 333-122176
Onyx Pharmaceuticals, Inc. (MM) (NASDAQ:ONXX)
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