Reconciliation of GAAP Measures to Non-GAAP Measures

II-VI SEGMENT REVENUE BY END MARKETS FOR Q4FY22 QTD End Market Distribution of Q4FY22 QTD Revenue Reported Segments Q4FY21 Revenue Q4FY22 Revenue Q4FY22 Op Margin - GAAP / Non-GAAP Q4FY22/ Q4FY21 Revenue Growth Communica- tions Industrial Aerospace & Defense Semi Cap Life Sciences, Consumer, Automotive, Other Photonic Solutions $550M $597M 12% / 15% 9% 94% 3% 0% 1% 2% Compound $258M $290M 18% / 27% 12% 10% 31% 17% 14% 28% Semiconductors II-VI $808M $887M 13% / 19% 10% 66% 12% 5% 5% 12% Consolidated COHERENT Copyright 2022, Coherent. All rights reserved. 28

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