144 0002016813 XXXXXXXX LIVE 0001262039 FORTINET, INC. 001-34511 909 Kifer Road Sunnyvale CA 94086 4082357700 Margrit Christiane Ohlgart Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

756 88973.64 732648391 05/14/2026 NASDAQ Common 05/01/2025 RSU/PSU Issuer N 756 05/01/2025 N/A N 10b5-1 Sales for MARGRIT CHRISTIANE OHLGART

909 Kifer Road Sunnyvale CA 94086

Common 05/11/2026 238 27370.00 10b5-1 Sales for MARGRIT CHRISTIANE OHLGART

909 Kifer Road Sunnyvale CA 94086

Common 05/07/2026 756 83160.00 10b5-1 Sales for MARGRIT CHRISTIANE OHLGART

909 Kifer Road Sunnyvale CA 94086

Common 05/05/2026 596 53461.20 The securities to be sold were acquired upon the vesting of restricted stock units and performance stock units during the period of 05/01/2025 through 02/01/2026 05/14/2026 03/07/2025 /s/ Margrit Christiane Ohlgart