X0306 4 2017-03-15 0 0001466301 Clovis Oncology, Inc. CLVS 0001268304 IVERS-READ GILLIAN C C/O CLOVIS ONCOLOGY, INC. 5500 FLATIRON PARKWAY, SUITE 100 BOULDER CO 80301 0 1 0 0 See Remarks Common Stock 2017-03-15 4 S 0 3000 66.99 D 209583 D This transaction was executed in multiple trades at prices ranging from $66.95 to $67.09. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 6, 2017. Executive Vice President of Technical Operations and Chief Regulatory Officer /s/ Gillian C. Ivers-Read 2017-03-15