X0306 4/A 2021-02-19 2021-03-29 0000855658 LATTICE SEMICONDUCTOR CORP LSCC 0001752584 Douglass Stephen 5555 NE MOORE COURT HILLSBORO OR 97124 1 SVP, R&D Restricted Stock Unit (RSU) 0 2021-02-19 4 A 0 11403 0 A 2022-02-19 Common Stock 11403 170301 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 grants of (i) 11,403 Performance Restricted Stock Units (PRSUs) and (ii) 45,613 PRSUs, each reported in Table II of the original Form 4, should not have been reported. As the vesting of the PRSUs is subject to performance criteria other than the passage time or the market price of the Issuer's securities, the PRSUs were not reportable at the time of grant as they did not constitute "derivative securities" for purposes of Section 16. 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. /s/ Tracy Feanny, Attorney in Fact For: Stephen Mark Douglass 2023-02-21