X0407 4 2023-05-25 0 0000851310 HARMONIC INC HLIT 0001730628 Jankovic Walter C/O HARMONIC INC. 2590 ORCHARD PARKWAY SAN JOSE CA 95131 0 1 0 0 Chief Financial Officer 0 Restricted Stock Units 0.00 2023-05-25 4 A 0 79734 0.00 A 2024-05-22 2026-05-22 Common Stock 79734 79734 D Each restricted stock unit represents a contingent right to receive one share of HLIT common stock. One third (33.33%) of the Shares subject to the Restricted Stock Units are scheduled to vest on May 22, 2024, and approximately 8.33% of the remaining Restricted Stock Units will vest each three months thereafter, so as to be 100% vested on the third anniversary of the RSU Vesting Commencement Date. /s/ Wendi Ninh, Attorney-in-Fact 2023-05-30