Bryan Lee plan to sell securities of Five9, Inc. under Form 144

Bryan Lee filed Form 144 to notify SEC of plan to sell 4769 units of Five9, Inc. securities around 2026-06-04, with aggregate market value of $119,358.17. The total outstanding units is 74723569.0. The amount planned to be sold represents 0.01% of total outstanding units; Recent transactions in past 3 months include: On 03/04/2026, sold 9855 units for $174433.50; On 03/05/2026, sold 1756 units for $31467.52;