X0306 4 2017-03-20 0 0000851310 HARMONIC INC HLIT 0001216448 HARSHMAN PATRICK 4300 NORTH FIRST STREET SAN JOSE CA 95134 1 1 0 0 President and CEO Performance Restricted Stock Units 0.00 2017-03-20 4 A 0 84000 0.00 A 2017-03-20 2020-03-15 Common Stock 84000 84000 D Each performance restricted stock unit, or PRSU, represents a contingent right to receive one share of HLIT common stock. If the closing price of HLIT's common stock, as quoted on the NASDAQ Stock Market, equals or exceeds certain stock price thresholds for at least 20 consecutive trading days (the "Minimum Trading Period"), then 25% of the PRSUs will vest on the final day of the Minimum Trading Period. If the stock price threshold for which the Minimum Trading Period has been satisfied exceeds one or more other stock price thresholds for which the PRSU award has not already vested, then the vesting associated with all such stock price thresholds shall occur as of the close of market on the final day of the Minimum Trading Period. /s/ Laura Donovan By Attorney-in-Fact: Laura Donovan 2017-03-22