X0407 4 2023-04-18 0 0000851310 HARMONIC INC HLIT 0001399157 Ben-Natan Nimrod 2590 ORCHARD PARKWAY SAN JOSE CA 95131 0 1 0 0 SVP & GM, Broadband Business 0 Common Stock 2023-04-18 4 M 0 6964 0.00 A 315624 D These shares of common stock were acquired upon the vesting of performance-based restricted stock units ("PRSUs") on April 18, 2023. The PRSUs were granted on February 17, 2023, and achievement of the performance condition for vesting was confirmed by the Compensation Committee of the Company's Board of Directors. /s/ Laura Donovan By Attorney-in-Fact: Laura Donovan 2023-04-20