BRYAN LEE plan to sell securities of FIVE9,INC. under Form 144

BRYAN LEE filed Form 144 to notify SEC of plan to sell 12307 units of FIVE9,INC. securities around 2026-06-04, with aggregate market value of $294,752.65. The total outstanding units is 76563988.0. The amount planned to be sold represents 0.02% of total outstanding units; Recent transactions in past 3 months include: On 03/05/2026, sold 1756 units for $31467.52;