X0306 4 2017-04-01 1 0001093557 DEXCOM INC DXCM 0001408993 ROPER JESS 6340 SEQUENCE DRIVE SAN DIEGO CA 92121 0 1 0 0 Former SVP, CFO /s/ Kevin Sun, By: Kevin Sun, For: Jess Roper 2017-04-05