X0306 4 2023-02-17 0 0000851310 HARMONIC INC HLIT 0001554982 Reaugh Mitzi 2590 ORCHARD PARKWAY SAN JOSE CA 95131 1 0 0 0 Restricted Stock Units 0.00 2023-02-17 4 A 0 10446 0.00 A 2024-02-15 2024-02-15 Common Stock 10446 10446 D Each restricted stock unit represents a contingent right to receive one share of HLIT common stock. The shares subject to the restricted stock units are scheduled to vest in full on February 15, 2024. Vested shares will be delivered to the reporting person on or immediately following February 15, 2024. /s/ Laura Donovan By Attorney-in-Fact Laura Donovan 2023-02-21