X0306 4/A 2022-05-14 2022-10-21 0 0000855658 LATTICE SEMICONDUCTOR CORP LSCC 0001752584 Douglass Stephen 5555 NE MOORE COURT HILLSBORO OR 97124 0 1 0 0 SVP, R&D Common Stock 2022-05-14 4 F 0 958 49.38 D 113631 D These shares were retained by the Issuer in order to meet the tax withholding obligations of the Reporting Person in connection with the vesting of an installment of the restricted stock units. The amount retained by the Issuer was not in excess of the amount of the tax liability. Amendment is being filed solely to provide the Power of Attorney authorizing the signatory to sign on behalf of the Reporting Person. By: Tracy Feanny, Attorney in Fact For: Stephen Mark Douglass 2022-10-21