X0306 4 2014-03-25 0 0001302573 OncoMed Pharmaceuticals Inc OMED 0001553335 Dupont Jakob C/O ONCOMED PHARMACEUTICALS, INC. 800 CHESAPEAKE DRIVE REDWOOD CITY CA 94063 0 1 0 0 SVP & Chief Medical Officer Common Stock 2014-03-25 4 A 0 20000 0.00 A 20896 D Restricted stock units. The Reporting Person is entitled to receive one (1) share of common stock for each one (1) restricted stock unit. Includes 896 shares acquired under the Issuer's Employee Stock Purchase Plan on February 28, 2014. /s/ Alicia J. Hager, Attorney-in-Fact for Jakob Dupont 2014-03-27