X0306 4 2016-01-06 0 0001302573 OncoMed Pharmaceuticals Inc OMED 0001553333 Hoey Timothy C/O ONCOMED PHARMACEUTICALS, INC. 800 CHESAPEAKE DRIVE REDWOOD CITY CA 94063 0 1 0 0 SVP, Cancer Biology Common Stock 2016-01-06 4 S 0 2092 22.3006 D 47251 D Common Stock 2016-01-06 4 S 0 69 21.5601 D 47182 D Common Stock 2016-01-07 4 S 0 1 21.33 D 47181 D Pursuant to a sell-to-cover election made by the Reporting Person at the time of the initial grant of the restricted stock unit award, the shares were sold upon the vesting of restricted stock units solely to cover applicable withholding taxes. Includes 15,000 restricted stock units. The Reporting Person is entitled to receive one (1) share of common stock for each one (1) restricted stock unit. /s/ Alicia Hager, Attorney-in-Fact for Timothy Hoey 2016-01-08