Exhibit 99.1 FOR IMMEDIATE RELEASE January 28, 2026 (All amounts in U.S. dollars) CELESTICA ANNOUNCES FOURTH QUARTER AND FY 2025 FINANCIAL RESULTS Q4 2025 revenue and adjusted EPS* above the high end of our guidance ranges; Raising 2026 annual outlook TORONTO, Canada - Celestica Inc. (NYSE: CLS) (TSX: CLS), a global leader in data center infrastructure and advanced technology solutions, today announced its financial results for the fourth quarter ended December 31, 2025 (Q4 2025). 1 Q4 2025 Highlights 2025 ...