X0306 4 2018-10-18 0 0000851310 HARMONIC INC HLIT 0001756365 Clifford Deborah 4300 NORTH FIRST STREET SAN JOSE CA 95134 1 0 0 0 Restricted Stock Units 0.00 2018-10-18 4 A 0 29795 0.00 A 2019-10-18 2021-10-18 Common Stock 29795 29795 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 three equal parts on October 18, 2019, October 18, 2020, and October 18, 2021. Vested shares will be delivered to the reporting person on or immediately following each vest date. /s/ Laura Donovan By Attorney-in-Fact Laura Donovan 2018-10-19