Exhibit 99.1 FOR IMMEDIATE RELEASE Bel Fuse Inc. 300 Executive Drive Suite 300 West Orange, NJ 07052 www.belfuse.com tel 201.432.0463 Bel Reports First Quarter 2025 Results WEST ORANGE, NJ, Thursday, April 24, 2025-- Bel Fuse Inc. (Nasdaq: BELFA and BELFB) today announced preliminary financial results for the first quarter of 2025. First Quarter 2025 Highlights "We are pleased with our first quarter results, which benefitted from our increased exposure within the defense and commercial aerospace industries ...