FOR IMMEDIATE RELEASE July 28, 2025 Exhibit 99.1 (All amounts in U.S. dollars) CELESTICA ANNOUNCES SECOND QUARTER 2025 FINANCIAL RESULTS Q2 2025 revenue and adjusted EPS* above the high end of our guidance ranges; Raising 2025 annual outlook TORONTO, Canada - Celestica Inc. (TSX and NYSE: CLS), a leader in design, manufacturing, hardware platform and supply chain solutions for the world's most innovative companies, today announced financial results for the quarter ended June 30, 2025 (Q2 2025). 1 Q2 2025 Hi ...