X0609 4 2026-05-20 0000855658 LATTICE SEMICONDUCTOR CORP LSCC 0001992449 Desale Pravin false 5555 NE MOORE COURT HILLSBORO OR 97124 1 SVP, R&D 1 Common Stock 2026-05-20 4 S 0 200 127.05 D 91034 D Common Stock 2026-05-20 4 S 0 300 129.0133 D 90734 D Common Stock 2026-05-20 4 S 0 800 130.4341 D 89934 D Common Stock 2026-05-20 4 S 0 900 131.3939 D 89034 D Common Stock 2026-05-20 4 S 0 1500 132.4434 D 87534 D Common Stock 2026-05-20 4 S 0 3700 133.5458 D 83834 D Common Stock 2026-05-20 4 S 0 1900 134.657 D 81934 D Common Stock 2026-05-20 4 S 0 1700 135.5274 D 80234 D Common Stock 2026-05-20 4 S 0 1100 136.70360 D 79134 D Common Stock 2026-05-20 4 S 0 1100 137.6927 D 78034 D Common Stock 2026-05-20 4 S 0 955 138.6517 D 77079 D The transaction indicated was conducted under an approved 10b5-1 Plan, adoption date of referenced 10b5-1(c) plan is: 02-18-2026. This transaction was executed in multiple trades at prices ranging from $127.0500 to $127.0500. 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 $128.5500 to $129.4400. 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 $129.8400 to $130.8200. 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 $130.8600 to $131.8250. 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 $132.0400 to $132.9800. 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 $133.0600 to $134.0500. 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 $134.0600 to $135.0000. 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 $135.0800 to $136.0300. 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 $136.2000 to $137.1100. 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 $137.2500 to $138.0400. 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 $138.4200 to $138.9300. 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, Attorney in Fact For: Pravin Desale 2026-05-21