X0306 4 2022-02-18 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 2022-02-18 4 S 0 461 61.5165 D 119378 D Common Stock 2022-02-18 4 S 0 431 61.5201 D 118947 D Common Stock 2022-02-18 4 S 0 9191 61.5138 D 109756 D Common Stock 2022-02-18 4 S 0 104 61.7008 D 109652 D Restricted Stock Unit (RSU) 2022-02-18 4 A 0 14171 0.0 A Common Stock 14171 14171 D The transaction indicated was conducted under an approved 10b5-1 Plan. The price indicated is the weighted average sale price for the shares sold. The individual sale prices for the shares indicated range from $60.88 to $62.20. The price indicated is the weighted average sale price for the shares sold. The individual sale prices for the shares indicated range from $60.88 to $62.31. The price indicated is the weighted average sale price for the shares sold. The individual sale prices for the shares indicated range from $61.02 to $62.37. The price indicated is the weighted average sale price for the shares sold. The individual sale prices for the shares indicated range from $61.02 to $62.28. Restricted Stock Units - no exercise price for this transaction. Grants of Restricted Stock Units (RSUs) vest as follows: 25% of the RSUs will vest on the first anniversary of the date of grant, and an additional 6.25% of the RSUs shall vest at the end of each three month period thereafter. Not applicable. Restricted Stock Units - no purchase price for this transaction. By: Byron W. Milstead, Attorney in Fact For: Stephen Mark Douglass 2022-02-18