X0609 4 2026-06-04 0000855658 LATTICE SEMICONDUCTOR CORP LSCC 0001891117 Feanny Tracy Ann false 5555 NE MOORE COURT HILLSBORO OR 97124 1 SVP, General Counsel 1 Common Stock 2026-06-04 4 S 0 425 148.3358 D 65399 D Common Stock 2026-06-04 4 S 0 475 149.9226 D 64924 D Common Stock 2026-06-04 4 S 0 382 151.69590 D 64542 D Common Stock 2026-06-04 4 S 0 498 152.80030 D 64044 D Common Stock 2026-06-04 4 S 0 762 153.7427 D 63282 D Common Stock 2026-06-04 4 S 0 198 154.5257 D 63084 D The transaction indicated was conducted under an approved 10b5-1 Plan, adoption date of referenced 10b5-1(c) plan is: 03-05-2026. This transaction was executed in multiple trades at prices ranging from $148.0600 to $148.6500. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price. This transaction was executed in multiple trades at prices ranging from $149.2300 to $150.1000. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price. This transaction was executed in multiple trades at prices ranging from $151.1400 to $152.1100. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price. This transaction was executed in multiple trades at prices ranging from $152.2100 to $153.1400. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price. This transaction was executed in multiple trades at prices ranging from $153.2900 to $154.1600. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price. This transaction was executed in multiple trades at prices ranging from $154.4800 to $154.5800. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price. /s/ Tracy Feanny 2026-06-05