X0508 4 2024-01-31 0000855658 LATTICE SEMICONDUCTOR CORP LSCC 0001752584 Douglass Stephen 5555 NE MOORE COURT HILLSBORO OR 97124 1 SVP, CTO 0 Common Stock 2024-01-31 4 M 0 22806 0 A 168020 D Common Stock 2024-01-31 4 F 0 12414 60.86 D 155606 D Performance Restricted Stock Unit (PRSU) 0 2024-01-31 4 M 0 22806 0 D Common Stock 22806 0 D Restricted Stock Units (RSUs) - no purchase price for this transaction. The total beneficial ownership of shares includes 86 shares acquired on December 31, 2023 under the Issuer's 2012 Employee Stock Purchase Plan. 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. Each Restricted Stock Unit (RSU) represents a right to receive one share of the Issuer's common stock without payment of specific consideration. Performance Restricted Stock Units (PRSUs) vest as follows: the PRSUs will vest 13 months after the end of the associated measurement period, subject to the achievement of certain performance conditions. Not applicable. /s/ Tracy Feanny, Attorney in Fact For: Stephen Douglass 2024-02-02