X0306 4 2021-02-10 0 0000889331 LITTELFUSE INC /DE LFUS 0001122794 MAJOR JOHN E C/O LITTELFUSE, INC. 8755 W. HIGGINS ROAD, SUITE 500 CHICAGO IL 60631 1 0 0 0 Common Stock 2021-02-10 4 M 0 1447 96.15 A 22832 D Common Stock 2021-02-10 4 M 0 1200 120.15 A 24032 D Common Stock 2021-02-10 4 S 0 2347 270.10 D 21685 D Common Stock 2021-02-10 4 S 0 300 271.16 D 21385 D Stock Option (right to buy) 96.15 2021-02-10 4 M 0 1447 0 D 2022-04-24 Common Stock 1447 0 D Stock Option (right to buy) 120.15 2021-02-10 4 M 0 1200 0 D 2023-04-22 Common Stock 1200 0 D The shares were sold in multiple transactions at prices ranging from $270.00 to $270.99, 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 $271.06 to $271.26, 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 option for 1,447 shares vested in increments of one third annually beginning on the first anniversary of the April 24, 2015 date of grant. The option for 1,200 shares vested in increments of one third annually beginning on the first anniversary of the April 22, 2016 date of grant. Hans Weinburger, by power of attorney 2021-02-11