X0306 4 2021-11-14 0 0000855658 LATTICE SEMICONDUCTOR CORP LSCC 0001752584 Douglass Stephen 5555 NE MOORE COURT HILLSBORO OR 97124 0 1 0 0 VP Corp, R&D Common Stock 2021-11-14 4 M 0 1820 0.0 A 99589 D Common Stock 2021-11-14 4 S 0 903 82.46 D 98686 D Common Stock 2021-11-16 4 S 0 1027 82.8 D 97659 D Restricted Stock Unit (RSU) 0.0 2021-11-14 4 M 0 1820 0.0 D 2022-02-19 Common Stock 1820 124320 D Restricted Stock Units - no purchase price for this transaction. 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. The transaction indicated was conducted under an approved 10b5-1 Plan. The price indicated is the weighted average sale price for the shares sold. The individual sale prices for the shares indicated range from $82.80 to $82.80. Not applicable. By: Byron W. Milstead Attorney in Fact For: Stephen Mark Douglass 2021-11-16