THOUSAND OAKS, Calif., Oct. 1, 2013 /PRNewswire/ -- Amgen (NASDAQ:AMGN) today announced that it has successfully completed its previously announced tender offer to purchase all outstanding shares of common stock of Onyx Pharmaceuticals, Inc. (NASDAQ:ONXX) for $125 per share in cash. As announced on Aug. 25, the purchase price is $9.7 billion net of estimated Onyx cash. The tender offer expired at 12:00 midnight New York City time on Oct. 1, 2013. Amgen expects to complete the acquisition of Onyx later today through a merger under Section 251(h) of the General Corporation Law of the State of Delaware. "Amgen's acquisition of Onyx fits perfectly with our commitment to advancing medicines for cancer patients around the world," said Robert A. Bradway, chairman and chief executive officer of Amgen. "We look forward to working together with the talented staff at Onyx to make the most of our exciting oncology portfolio and pipeline." As of the expiration of the tender offer, approximately 57,698,132 shares were validly tendered and not withdrawn in the tender offer, representing approximately 78.5 percent of Onyx's outstanding shares, according to the depositary for the tender offer. The condition to the tender offer that a majority of Onyx's outstanding shares on a fully-diluted basis be validly tendered and not withdrawn has been satisfied. As a result, Amgen has accepted for payment and will promptly pay for all validly tendered shares. As a result of the merger planned to be effected later today, all remaining eligible Onyx shares will be converted into the right to receive $125 per share in cash, without interest and less any applicable withholding taxes, the same price that was paid in the tender offer (eligible shares exclude those for which holders properly demanded appraisal under Delaware law and those held by Amgen or Onyx or their respective wholly owned subsidiaries). Following completion of the merger, Onyx shares will cease to be traded on the NASDAQ Global Market, which is expected to take effect later today. About Amgen Amgen is committed to unlocking the potential of biology for patients suffering from serious illnesses by discovering, developing, manufacturing and delivering innovative human therapeutics. This approach begins by using tools like advanced human genetics to unravel the complexities of disease and understand the fundamentals of human biology.