X0306 4 2022-05-05 0 0001138639 Infinera Corp INFN 0001399122 Welch David F C/O INFINERA CORPORATION 6373 SAN IGNACIO AVENUE SAN JOSE CA 95119 1 0 0 0 Common Stock 2022-05-05 4 M 0 17187 0.00 A 196500 I See Footnote Common Stock 2022-05-05 4 M 0 33333 0.00 A 229833 I See Footnote Common Stock 2022-05-05 4 F 0 17471 6.33 D 212362 I See Footnote Common Stock 2500 I See Footnote Restricted Stock Units 2022-05-05 4 M 0 17187 0.00 D Common Stock 17187 0 D Restricted Stock Units 2022-05-05 4 M 0 33333 0.00 D Common Stock 33333 0 D These shares are held directly by The Welch Family Trust U/A DTD 4/3/1996 ("The Welch Family Trust"), for which Dr. Welch is a trustee. Represents shares that have been withheld by Infinera Corporation (the "Company") to satisfy tax withholding and remittance obligations in connection with the net settlement of vested restricted stock units ("RSUs"). Shares held directly by Dr. Welch as a trustee for his minor children. Dr. Welch disclaims beneficial ownership of the shares held in trust for his minor children, and this report shall not be deemed an admission that Dr. Welch is the beneficial owner of the shares held in trust for his minor children for purposes of Section 16 or for any other purpose. Each RSU represents a contingent right to receive one share of common stock of the Company. These RSUs, originally for a total of 68,750 shares, vested as to one-fourth of the shares on each one-year anniversary of the May 5, 2018 vesting commencement date, subject to Dr. Welch's continued service to the Company through each applicable vesting date. These RSUs, originally for a total of 100,000 shares, vested as to one-third of the shares on each one-year anniversary of the May 5, 2019 vesting commencement date, subject to Dr. Welch's continued service to the Company through each applicable vesting date. /s/ David L. Teichmann, by Power of Attorney 2022-05-09