X0306 4 2022-02-17 0000855658 LATTICE SEMICONDUCTOR CORP LSCC 0001752584 Douglass Stephen 5555 NE MOORE COURT HILLSBORO OR 97124 1 SVP, R&D Performance Restricted Stock Unit (PRSU) 0 2022-02-17 4 A 0 22806 0 A 2023-01-31 Common Stock 22806 22806 D On February 17, 2022, the Compensation Committee of the Issuer's Board of Directors certified the achievement of the first tranche of the Performance Restricted Stock Units (PRSUs) granted on February 19, 2021 and determined a 200% payout for the first measurement period based on the Issuer's fiscal year 2021 revenue. These PRSUs will vest on January 31, 2023. Not applicable. /s/ Tracy Feanny, Attorney in Fact For: Stephen Mark Douglass 2023-02-21