0001288847 2021-11-08 2021-11-08 0001288847 false 8-K 2021-11-08 FIVE9, INC. DE 001-36383 94-3394123 3001 Bishop Drive, Suite 350 San Ramon, CA 94583 925 201-2000 false false false false Common stock, par value $0.001 per share FIVN NASDAQ false