144 0002000932 XXXXXXXX LIVE 0001288847 Five9, Inc. 001-36383 3001Bishop Drive Suite 350 San Ramon CA 94583 925-201-2000 Andrew Dignan Officer Common Morgan Stanley Smith Barney LLC

Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004

2840 94383.9 76243052 03/04/2025 Nasdaq Common 03/03/2025 RSU's Issuer N 2840 03/03/2025 Not Applicable Y 03/04/2025 Andrew Dignan