X0306 4 2019-02-01 0 0001262039 FORTINET INC FTNT 0001475586 Xie Michael C/O FORTINET, INC. 899 KIFER ROAD SUNNYVALE CA 94086 1 1 0 0 VP, Engineering & CTO Common Stock 2019-02-01 4 M 0 2500 0 A 6462500 D Common Stock 2019-02-01 4 M 0 2500 0 A 6465000 D Common Stock 2019-02-01 4 M 0 2500 0 A 6467500 D Common Stock 2019-02-01 4 M 0 7100 0 A 6474600 D Common Stock 2019-02-01 4 F 0 5476 78.90 D 6469124 D Common Stock 2019-02-04 4 S 0 27918 79.926 D 3650296 I See footnote Common Stock 2019-02-04 4 S 0 2082 80.2829 D 3648214 I See footnote Common Stock 1991686 I See Footnote Restricted Stock Units 0 2019-02-01 4 M 0 2500 0 D Common Stock 2500 0 D Restricted Stock Units 0 2019-02-01 4 M 0 2500 0 D Common Stock 2500 10000 D Restricted Stock Units 0 2019-02-01 4 M 0 2500 0 D Commn Stock 2500 20000 D Restricted Stock Units 0 2019-02-01 4 M 0 7100 0 D Common Stock 7100 21300 D Vesting of restricted stock units ("RSUs") granted to the Reporting Person on February 11, 2015. Vesting of RSUs granted to the Reporting Person on February 11, 2016. Vesting of RSUs granted to the Reporting Person on February 16, 2017. Vesting of RSUs granted to the Reporting Person on February 20, 2018. 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 sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 22, 2018. Represents the aggregate of sales effected on the same day at different prices Represents the weighted average sales price per share. The shares sold at prices ranging from $79.18 to $80.17 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. Represents the weighted average sales price per share. The shares sold at prices ranging from $80.18 to $80.37 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. Shares held directly by The K.A. Children's Trust dated February 9, 2011, for which the Reporting Person serves as a trustee. Shares held directly by the 2010 K.A. Family Trust dated May 3, 2010, for which the Reporting Person serves as a trustee. Each RSU represents a contingent right to receive one share of the Issuer's common stock. 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. 25% of the RSUs vest on February 1, 2017, 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, 2018, 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 vested on February 1, 2019, 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/John Whittle, by power of attorney 2019-02-05