X0306 4 2020-09-04 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 2020-09-04 4 M 0 8076 0.0 A 51200 D Common Stock 2020-09-04 4 F 0 4005 28.02 D 47195 D Common Stock 2020-09-04 4 M 0 61538 0.0 A 108733 D Common Stock 2020-09-04 4 F 0 30511 0.0 D 78222 D Performance Restricted Stock Unit (PRSU) 0.0 2020-09-04 4 M 0 61538 0.0 D 2019-09-30 Common Stock 61538 83406 D Restricted Stock Unit (RSU) 0.0 2020-09-04 4 M 0 8076 0.0 D 2019-09-04 Common Stock 8076 169227 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. Represents shares earned with respect to performance restricted stock units (PRSUs)based on the achievement by Lattice Semiconductor of certain performance targets for the period September 4, 2019 to September 3, 2020. Each Restricted Stock Unit (RSU) represents a right to receive one share of the Issuers common shares without payment of specific consideration. Not applicable. This grant of Restricted Stock Units (RSUs) vest as follows: 25% of the RSUs will vest upon the one-year anniversary of the grant date and an additional 6.25% of the RSUs vest each three months thereafter until 100% of the RSU grant is vested. By: Byron W. Milstead, Attorney in Fact For: Stephen Mark Douglass 2020-09-08