X0508 4 2026-02-24 0 0001288847 Five9, Inc. FIVN 0002080340 Tuckness Matthew E. C/O FIVE9, INC. 3001 BISHOP DRIVE, SUITE 350 SAN RAMON CA 94583 0 1 0 0 Chief Revenue Officer 0 Common Stock 2026-02-24 4 A 0 118922 0 A 295301 D /s/ Tiffany Meriweather, Attorney in Fact 2026-02-26