X0306 4 2016-11-01 0 0001262039 FORTINET INC FTNT 0001476336 Whittle John C/O FORTINET, INC. 899 KIFER ROAD SUNNYVALE CA 94086 0 1 0 0 VP Corp Dev&Strat Alliance,GC Common Stock 2016-11-01 4 M 0 2187 0 A 6868 D Common Stock 2016-11-01 4 M 0 2500 0 A 9368 D Common Stock 2016-11-01 4 M 0 1875 0 A 11243 D Common Stock 2016-11-01 4 F 0 3426 31.76 D 7817 D Restricted Stock Units 0 2016-11-01 4 M 0 2187 0 D Common Stock 2187 2188 D Restricted Stock Units 0 2016-11-01 4 M 0 2500 0 D Common Stock 2500 12500 D Restricted Stock Units 0 2016-11-01 4 M 0 1875 0 D Common Stock 1875 16875 D Vesting of RSUs granted to the Reporting Person on February 13, 2013. Vesting of RSUs granted to the Reporting Person on February 12, 2014. Vesting of RSUs granted to the Reporting Person on February 11, 2015. Exempt transaction pursuant to Section 16b-3(e) - payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3. All of the shares reported as disposed of on this line were relinquished by the Reporting Person and cancelled by the Issuer in exchange for the Issuer's agreement to pay federal and state tax withholding obligations of the Reporting Person resulting from the vesting of RSUs and PSUs. The price per share was based on the fair market value of the Issuer's common stock on the vesting and release date. Each RSU represents a contingent right to receive one share of the Issuer's common stock. 25% of the RSUs vested on February 1, 2014, then the remaining 75% of the RSUs vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, 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. 25% of the RSUs vest on February 1, 2015, then the remaining 75% of the RSUs vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, subject to the continuing employment of the Reporting Person on each vesting date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon vesting. 25% of the RSUs vest on February 1, 2016, then the remaining 75% of the RSUs vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, subject to the continuing employment 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/ Robert Turner, by power of attorney 2016-11-03