Exhibit 99.1 Coherent Corp. 375 Saxonburg Blvd. Saxonburg, PA 16056-9499 PRESS RELEASE COHERENT CORP. REPORTS FIRST QUARTER FISCAL 2026 RESULTS SAXONBURG, Pa., November 5, 2025 (GLOBE NEWSWIRE) – Coherent Corp. (NYSE: COHR) ("Coherent," "We," or the "Company"), a global leader in photonics, announced financial results today for its first quarter of fiscal year 2026 ended September 30, 2025. Revenue for the first quarter of fiscal 2026 was $1.58 billion, with GAAP gross margin of 36.6% and GAAP net income of ...