X0508 4 2025-08-25 0000889331 LITTELFUSE INC /DE LFUS 0001766692 Conrad Alexander 6133 NORTH RIVER ROAD, SUITE 500 ROSEMONT IL 60018 true SVP &GM Passenger Vehicle false Common Stock 2025-08-25 4 M 0 5293 166.63 A 12233 D Common Stock 2025-08-25 4 M 0 3604 132.08 A 15837 D Common Stock 2025-08-25 4 M 0 800 199.24 A 16637 D Common Stock 2025-08-25 4 S 0 8217 261.06 D 8420 D Common Stock 2025-08-25 4 S 0 3522 261.75 D 4898 D Common Stock 2025-08-25 4 S 0 1471 262.73 D 3427 D Stock Option (right to buy) 166.63 2025-08-25 4 M 0 5293 0 D 2027-07-10 Common Stock 5293 0 D Stock Option (right to buy) 132.08 2025-08-25 4 M 0 3604 0 D 2027-04-23 Common Stock 3604 0 D Stock Option (right to buy) 199.24 2025-08-25 4 M 0 800 0 D 2026-04-26 Common Stock 800 0 D The option for 5,293 shares vested in increments of one third annually beginning on the first anniversary of the July 10, 2020 date of grant. The option for 5,353 shares vested in increments of one third annually beginning on the first anniversary of the April 23, 2020 date of grant. The option for 2,401 shares vested in increments of one third annually beginning on the first anniversary of the April 26, 2019 date of grant. The shares were sold in multiple transactions at prices ranging from $260.43 to $261.42, 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 $261.20 to $262.13, 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 $262.22 to $262.68, 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. Ryan K. Stafford, Power of Attorney 2025-08-26