Reconciliation of GAAP Measures to Non-GAAP Measures

II-VI SEGMENT REVENUE BY END MARKETS FOR FULL YEAR FY21 End Market Distribution of Full Year FY21 Revenue Reported Segments FY21 Revenue FY21 Op Margin - GAAP / Non- GAAP FY21/FY20 Revenue Growth Proforma(1) FY21/FY20 Revenue Growth Life Sciences, Communic a-tions Industrial Aerospace & Defense Semi Cap Consumer, Automotive, Other Photonic Solutions $2,038M 10% / 16% 31% 12% 94% 3% 0% 1% 2% Compound $1,068M 21% / 26% 30% 30% 13% 26% 19% 10% 32% Semiconductors II-VI Consolidated $3,106M 13% 19% 31% 18% 66% 10% 7% 4% 13% (1) Pro Forma calculation in accordance with ASC 805. COHERENT Copyright 2022, Coherent. All rights reserved. 22 27

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