X0306 4 2021-02-15 0 0000851310 HARMONIC INC HLIT 0001504670 Kalra Sanjay 2590 ORCHARD PARKWAY SAN JOSE CA 95131 0 1 0 0 SVP and CFO Common Stock 2021-02-15 4 M 0 8334 0.00 A 143525 D Common Stock 2021-02-15 4 F 0 4645 7.605 D 138880 D Common Stock 2021-02-15 4 M 0 9584 0.00 A 148464 D Common Stock 2021-02-15 4 F 0 5007 7.605 D 143457 D Common Stock 2021-02-15 4 M 0 41790 0.00 A 185247 D Common Stock 2021-02-15 4 F 0 22002 7.605 D 163245 D Restricted Stock Units 0.00 2021-02-15 4 M 0 8334 0.00 D 2019-02-15 2021-02-15 Common Stock 8334 0 D Restricted Stock Units 0.00 2021-02-15 4 M 0 9584 0.00 D 2020-02-15 2022-02-15 Common Stock 9584 38333 D Restricted Stock Units 0.00 2021-02-15 4 M 0 41790 0.00 D 2021-02-15 2023-02-15 Common Stock 41790 83580 D Restricted Stock Units 0.00 2021-02-16 4 A 0 110153 0.00 A 2022-02-15 2024-02-15 Common Stock 110153 110153 D These shares of common stock were acquired upon the vesting of restricted stock units on 2/15/2021. These restricted stock units were initially granted to the Reporting Person on 3/20/2018, and were identified on a Form 4 filed by the Reporting Person on 3/22/2018. 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 2/15/2021. These restricted stock units were initially granted to the Reporting Person on 4/15/2019, and were identified on a Form 4 filed by the Reporting Person on 4/17/2019. These shares of common stock were acquired upon the vesting of restricted stock units on 2/15/2021. These restricted stock units were initially granted to the Reporting Person on 2/24/2020, and were identified on a Form 4 filed by the Reporting Person on 2/26/2020. Each restricted stock unit represents a contingent right to receive one share of HLIT common stock. One third (33.33%) of the Shares subject to the Restricted Stock Units are scheduled to vest on February 15, 2022, and approximately 8.33% of the remaining Restricted Stock Units will vest each three months thereafter, so as to be 100% vested on the third anniversary of the RSU Vesting Commencement Date. /s/ Laura Donovan By Attorney-in-Fact Laura Donovan 2021-02-17