X0306 4 2019-08-15 0 0001262039 Fortinet, Inc. FTNT 0001654708 Locke Gary C/O FORTINET, INC. 899 KIFER ROAD SUNNYVALE CA 94086 1 0 0 0 Restricted Stock Units 0.00 2019-08-15 4 A 0 3266 0.00 A Common Stock 3266 3266 D Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs will vest in substantially equal increments on each of September 30, 2019, December 31, 2019, March 31, 2020, and the earlier of (i) June 30, 2020 and (ii) the date immediately preceding the Issuer's 2020 annual meeting of shareholders, subject to the Reporting Person's provision of services to the Issuer on each vesting date. Shares of the Issuer's Common Stock will be delivered to the Reporting Person following vesting. /s/ John Whittle, by power of attorney 2019-08-16