Exhibit 99.1 FOR IMMEDIATE RELEASE April 24, 2024 (All amounts in U.S. dollars. Per share information based on diluted shares outstanding unless otherwise noted.) CELESTICA ANNOUNCES FIRST QUARTER 2024 FINANCIAL RESULTS Q1 2024 revenue and non-IFRS adjusted EPS* above the high end of guidance ranges; 2024 full-year outlook raised TORONTO, Canada - Celestica Inc. (TSX: CLS) (NYSE: CLS), a leader in design, manufacturing, hardware platform and supply chain solutions for the world's most innovative companies, ...