X0306 4 2018-02-05 0 0001262039 FORTINET INC FTNT 0001654708 Locke Gary C/O FORTINET, INC. 899 KIFER ROAD SUNNYVALE CA 94086 1 0 0 0 Common Stock 2018-02-05 4 M 0 1250 0 A 16250 D Restricted Stock Units 0 2018-02-05 4 M 0 1250 0 D Common Stock 1250 3750 D Vesting of restricted stock units ("RSUs") granted to the Reporting Person on November 5, 2015. Each RSU represents a contingent right to receive one share of the Issuer's common stock. 1/3 of the RSUs vested on November 5, 2016, and the remainder vest on each quarterly anniversary thereafter in equal installments, subject to the continuing service of the Reporting Person on each vesting date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon vesting. /s/ John Whittle, by power of attorney 2018-02-07