X0306 4/A 2023-01-31 2023-02-02 0000855658 LATTICE SEMICONDUCTOR CORP LSCC 0001752584 Douglass Stephen 5555 NE MOORE COURT HILLSBORO OR 97124 1 SVP, R&D Common Stock 2023-01-31 4 M 0 22806 0 A 147989 D There is no amendment to the transaction reported in this line item. The purpose of this Form 4 amendment is to reflect that the grant of 11,403 Performance Restricted Stock Units (PRSUs), reported in Table II of the original Form 4, should not have been reported. Restricted Stock Units - no purchase price for this transaction. The total beneficial ownership of shares includes 40 shares acquired on December 30, 2022 under the Issuer's 07/01/2022 Employee Stock Purchase Plan. /s/ Tracy Feanny, Attorney in Fact For: Stephen Mark Douglass 2023-02-21