X0306 4 2021-06-01 0 0000889331 LITTELFUSE INC /DE LFUS 0001071349 ZOMMER NATHAN 8755 W. HIGGINS ROAD SUITE 500 CHICAGO IL 60631 1 0 0 0 Common Stock 2021-06-01 4 S 0 680 261.95 D 259726 D Common Stock 2021-06-01 4 S 0 1220 262.84 D 258506 D Common Stock 2021-06-01 4 S 0 600 263.84 D 257906 D This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 27, 2020. The shares were sold in multiple transactions at prices ranging from $261.32 to $262.29, inclusive. This amount represents the weighted average sale price of such transactions. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. The shares were sold in multiple transactions at prices ranging from $262.33 to $263.19, inclusive. This amount represents the weighted average sale price of such transactions. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. The shares were sold in multiple transactions at prices ranging from $263.38 to $264.32, inclusive. This amount represents the weighted average sale price of such transactions. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. Hans Weinburger, by power of attorney 2021-06-03