BOULDER, Colo.--(BUSINESS WIRE)--Clovis Oncology, Inc. (Nasdaq: CLVS) announced today that it has filed a registration statement on Form S-1 with the U.S. Securities and Exchange Commission (SEC) relating to a proposed underwritten public offering of $75 million of shares of its common stock. In addition, Clovis Oncology expects to grant the underwriters the option to purchase up to $11.25 million of additional shares to cover over-allotments. All shares of the common stock to be sold in the offering will be offered by Clovis Oncology.