X0306 4 2020-02-06 0 0000889331 LITTELFUSE INC /DE LFUS 0001071349 ZOMMER NATHAN 8755 W. HIGGINS ROAD SUITE 500 CHICAGO IL 60631 1 0 0 0 Common Stock 2020-02-06 4 M 0 2530 74.08 A 343523 D Common Stock 2020-02-06 4 M 0 632 74.71 A 344155 D Common Stock 2020-02-06 4 M 0 632 73.29 A 344787 D Common Stock 2020-02-06 4 S 0 2112 187.65 D 342675 D Stock Option (right to buy) 74.08 2020-02-06 4 M 0 2530 0 D 2020-08-27 Common Stock 2530 0 D Stock Option (right to buy) 74.71 2020-02-06 4 M 0 632 0 D 2022-08-24 Common Stock 632 0 D Stock Option (right to buy) 73.29 2020-02-06 4 M 0 632 0 D 2023-08-30 Common Stock 632 0 D The number of shares beneficially owned reflects a reduction of 2 shares inadvertently included in the Reporting Person's prior beneficial ownership. The shares were sold in multiple transactions at prices ranging from $187.16 to $188.00. 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 2,530 shares vested in increments of one fourth annually beginning on the first anniversary of the August 27, 2010 date of grant. The option for 632 shares vested in increments of one fourth annually beginning on the first anniversary of the August 24, 2012 date of grant. The option for 632 shares vested in increments of one fourth annually beginning on the first anniversary of the August 30, 2013 date of grant. Hans Weinburger, by power of attorney 2020-02-07