Exhibit 99.1 • YTD Cash flow from operations of $295 million and free cash flow of$246 million; YTD cash conversion of 145% CHICAGO, October 29, 2025 - Littelfuse, Inc. (NASDAQ: LFUS), a leader in developing smart solutions that enable safe and efficient electrical energy transfer, today reported financial results for the third quarter ended September 27, 2025: "We are pleased with our third quarter performance as we delivered strong revenue growth versus the prior year while our adjusted diluted earnings ...