144 0001475587 XXXXXXXX LIVE 0001262039 FORTINET, INC. 001-34511 909 Kifer Road Sunnyvale CA 94086 4082357700 KEN QING XIE Director Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

160632 23635392.48 732648391 06/02/2026 NASDAQ Common 06/02/2026 Exercise of Stock Options Issuer N 155000 06/02/2026 Cash Common 02/01/2026 Restricted Stock Units Issuer N 5632 02/01/2026 N/A N President and Fellows of Harvard College

PO Box 419209 Boston MA 02241

Common 05/19/2026 2034 257274.15 Creative Center of Los Altos dba Pinewood School

327 Fremont Ave Los Altos CA 94024

Common 05/18/2026 17643 2183144.82 UC Berkeley

1995 University Avenue Suite 400 Berkeley CA 94704

Common 05/18/2026 3941 212760.01 10b5-1 Sales for KEN QING XIE

909 Kifer Road Sunnyvale CA 94086

Common 05/04/2026 5355 476033.80 The securities to be sold were acquired upon the vesting of restricted stock units during the period of 2/1/2026 through 5/1/2026. 06/02/2026 03/03/2026 /s/ Ken Xie