X0704 D LIVE 0001501989 CytomX Therapeutics, Inc. 460 WARD DRIVE, STE. E-1 SANTA BARBARA CA CALIFORNIA 93111 805-964-9700 DELAWARE None None Corporation true 2010 Nancy Stagliano 460 Ward Drive, Suite E-1 Santa Barbara CA CALIFORNIA 93101 Executive Officer Director Chief Executive Officer and Chief Financial Officer Frederick W. Gluck 460 Ward Drive, Suite E-1 Santa Barbara CA CALIFORNIA 93101 Executive Officer Director Chairman of the Board Alan Heeger 460 Ward Drive, Suite E-1 Santa Barbara CA CALIFORNIA 93101 Director Gary Wilcox 460 Ward Drive, Suite E-1 Santa Barbara CA CALIFORNIA 93101 Director Michael E. Pfau 1421 State Street, Ste. B Santa Barbara CA CALIFORNIA 93101 Executive Officer Secretary Other Decline to Disclose 06 false 2010-09-22 false true Series A-1 Preferred Stock false 0 102097 102097 0 Exchange of Series A-1 Preferred Units for Series A-1 Preferred Stock as part of a reorganization. false 1 0 0 0 false CytomX Therapeutics, Inc. /s/ Michael E. Pfau Michael E. Pfau Secretary 2010-09-27