Officer Stock Acquisition

David Ruppel, SVP & GM Transportation Bus. at LITTELFUSE INC /DE (LFUS), acquired 1018 shares of Common Stock on April 22, 2026, for a price of $0.00 per share. This acquisition was made under the Littelfuse/IXYS Corporation Long-Term Incentive Plan, with the restricted stock units vesting in increments of one-third annually starting on the first anniversary of the grant date. Following this transaction, Ruppel owns 5988 shares of the company's stock. The filing is Form 4, indicating a change in beneficial ownership by an insider.