X0306 4/A 2017-01-11 2017-01-11 0 0000851310 HARMONIC INC HLIT 0001466829 LOOKABAUGH TOM 4300 NORTH FIRST STREET SAN JOSE CA 95134 1 0 0 0 Restricted Stock Units 0.00 2017-01-11 4 A 0 23529 0.00 A 2018-01-11 2018-01-11 Common Stock 23529 23529 D Stock Option/Right to buy 5.10 2017-01-11 4 A 0 30000 5.10 A 2017-02-11 2020-01-11 Common Stock 30000 30000 D Each restricted stock unit represents a contingent right to receive one share of Harmonic common stock. The shares subject to these restricted stock units are scheduled to vest in full in one installment on January 11, 2018. Vested shares will be delivered to the reporting person on or immediately following January 11, 2018. The Option becomes exercisable as to 1/36th of the Shares subject to the Option at the end of each month following the Vesting Commencement Date. /s/ Laura Donovan By Attorney-in-Fact: Laura Donovan 2017-01-11