X0407 4 2023-05-18 0 0001262039 Fortinet, Inc. FTNT 0001418649 Jensen Keith C/O FORTINET, INC. 899 KIFER ROAD SUNNYVALE CA 94086 0 1 0 0 CFO & Chief Accounting Officer 0 Common Stock 2023-05-18 4 S 0 5050 68.2312 D 4572 D The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 8, 2022. Represents the weighted average sale price. The lowest price at which shares were sold was $67.80 and the highest price at which shares were sold was $68.68. The reporting person undertakes to provide upon request to the staff of the Securities Exchange Commission, the issuer or its stockholders, full information regarding the total number of shares sold at each separate price within the range set forth herein. /s/ Robert Turner, by power of attorney 2023-05-19