X0306 4 2021-11-18 0 0001262039 Fortinet, Inc. FTNT 0001661859 STAVRIDIS JAMES G. C/O FORTINET, INC. 899 KIFER ROAD SUNNYVALE CA 94086 1 0 0 0 Restricted Stock Units 0.00 2021-11-18 4 A 0 527 0.00 A Common Stock 527 527 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock. The RSUs will vest as to 100% of the underlying shares on the date immediately preceding the Issuer's 2022 annual meeting of shareholders, subject to the Reporting Person's provision of services to the Issuer on such vesting date. Shares of the Issuer's Common Stock will be delivered to the Reporting Person following vesting. RSUs do not expire; they either vest or are canceled prior to vesting date. /s/ Robert Turner, by power of attorney 2021-11-18