X0306 4 2021-02-11 0 0000851310 HARMONIC INC HLIT 0001216448 HARSHMAN PATRICK 2590 ORCHARD PARKWAY SAN JOSE CA 95131 1 1 0 0 President and CEO Common Stock 2021-02-11 4 M 0 89445 6.49 A 1111641 D Common Stock 2021-02-11 4 S 0 83167 7.8133 D 1028474 D Common Stock 2021-02-12 4 M 0 13527 6.49 A 1042001 D Common Stock 2021-02-12 4 S 0 12587 7.70 D 1029414 D Common Stock 2021-02-15 4 M 0 16667 0.00 A 1046081 D Common Stock 2021-02-15 4 F 0 8748 7.605 D 1037333 D Common Stock 2021-02-15 4 M 0 16667 0.00 A 1054000 D Common Stock 2021-02-15 4 F 0 8775 7.605 D 1045225 D Common Stock 2021-02-15 4 M 0 60944 0.00 A 1106169 D Common Stock 2021-02-15 4 F 0 32087 7.605 D 1074082 D Stock Option/Right to buy 6.49 2021-02-11 4 M 0 89445 6.49 D 2015-02-15 2021-03-14 Common Stock 89445 235555 D Stock Option/Right to buy 6.49 2021-02-12 4 M 0 13527 6.49 D 2015-02-15 2021-03-14 Common Stock 13527 222028 D Restricted Stock Units 0.00 2021-02-15 4 M 0 16667 0.00 D 2019-02-15 2021-02-15 Common Stock 16667 0 D Restricted Stock Units 0.00 2021-02-15 4 M 0 16667 0.00 D 2020-02-15 2022-02-15 Common Stock 16667 66666 D Restricted Stock Units 0.00 2021-02-15 4 M 0 60944 0.00 D 2021-02-15 2023-02-15 Common Stock 60944 121886 D Shares sold to cover exercise price and taxes in connection with exercise of stock option expiring on March 14, 2021. 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. /s/ Laura Donovan By Attorney-in-Fact Laura Donovan 2021-02-16