Financial Metrics and Projections

ATTRACTIVE OPERATING MARGINS Strong Execution and Synergy Realization Post Coherent Transaction Close Driving Margins Non-GAAP Gross and Operating Margins (1) (1) (2) 40.3% 39.8% 38.5% 37.3% Non-GAAP Gross Margin 21.3% 20.3% 17.2% 17.5% Non-GAAP Operating Margin Q4 FY22 Q1 FY23 Q2 FY23 Q3 FY23 Proforma(2) All non-GAAP amounts exclude certain adjustments for share-based compensation, acquired intangible amortization expense, certain one-time transaction expenses, debt extinguishment expense, fair value measurement period adjustments and restructuring and related items. See Appendix for reconciliation to most comparable GAAP measures. II-VI Incorporated and Coherent, Inc. figures are for the three months ended June 30, 2022 COHERENT Copyright 2023, Coherent. All rights reserved. 6

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