X0306 4 2019-09-06 0 0000855658 LATTICE SEMICONDUCTOR CORP LSCC 0001752584 Douglass Stephen 111 SW 5TH AVE., 7TH FL. PORTLAND OR 97204 0 1 0 0 VP Corp, R&D Common Stock 2019-09-06 4 M 0 61538 0.0 A 82672 D Common Stock 2019-09-06 4 F 0 29484 19.98 D 53188 D 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, 2018 to September 3, 2019. 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. By: Byron W., Milstead, Attorney-in-Fact For: Stephen Mark Douglass 2019-09-09