X0306 4 2022-02-15 0 0000851310 HARMONIC INC HLIT 0001820347 Graham Ian 2590 ORCHARD PARKWAY SAN JOSE CA 95131 0 1 0 0 SVP, Global Sales & Video Svcs Common Stock 2022-02-15 4 M 0 4584 0.00 A 97740 D Common Stock 2022-02-15 4 F 0 2502 9.43 D 95238 D Common Stock 2022-02-15 4 M 0 4092 0.00 A 99330 D Common Stock 2022-02-15 4 F 0 2233 9.43 D 97097 D Common Stock 2022-02-15 4 M 0 1667 0.00 A 98764 D Common Stock 2022-02-15 4 F 0 910 9.43 D 97854 D Common Stock 2022-02-15 4 M 0 27671 0.00 A 125525 D Common Stock 2022-02-15 4 F 0 15105 9.43 D 110420 D Restricted Stock Units 0.00 2022-02-15 4 M 0 4584 0.00 D 2020-02-15 2022-02-15 Common Stock 4584 0 D Restricted Stock Units 0.00 2022-02-15 4 M 0 4092 0.00 D 2021-02-15 2023-02-15 Common Stock 4092 16367 D Restricted Stock Units 0.00 2022-02-15 4 M 0 1667 0.00 D 2021-08-15 2023-08-15 Common Stock 1667 10001 D Restricted Stock Units 0.00 2022-02-15 4 M 0 27671 0.00 D 2022-02-15 2024-02-15 Common Stock 27671 55343 D These shares of common stock were acquired upon the vesting of restricted stock units on 2/15/2022. These restricted stock units were initially granted to the Reporting Person on 6/22/2019, and were identified on a Form 3 filed by the Reporting Person on August 7, 2020. Shares of Harmonic Inc. common stock withheld by Harmonic Inc. to satisfy tax withholding obligation upon vesting of restricted stock units. These shares of common stock were acquired upon the vesting of restricted stock units on 2/15/2022. These restricted stock units were initially granted to the Reporting Person on 2/24/2020, and were identified on a Form 3 filed by the Reporting Person on August 7, 2020. These shares of common stock were acquired upon the vesting of restricted stock units on 2/15/2022. These restricted stock units were initially granted to the Reporting Person on 8/19/2020, and were identified on a Form 4 filed by the Reporting Person on 8/21/2020. These shares of common stock were acquired upon the vesting of restricted stock units on 2/15/2022. These restricted stock units were initially granted to the Reporting Person on 2/16/2021, and were identified on a Form 4 filed by the Reporting Person on 2/18/2021. /s/ Laura Donovan By Attorney-in-Fact: Laura Donovan 2022-02-17