Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Sara Kesten Semtech Corporation (805) 480-2004 webir@semtech.com Semtech Announces First Quarter of Fiscal Year 2025 Results • Net sales of $206.1 million, above the high-end of guidance range • GAAP gross margin of 48.3% and Non-GAAP gross margin of 49.8%, above the midpoint of guidance • GAAP operating expenses of $96.4 million, down 16% year-over-year, and Non-GAAP operating expenses of $77.4 million, down 17% year-over-year and below the midpoint of guidance • ...