Reconciliation of GAAP Measures to Non-GAAP Measures

HYPOTHETICAL ILLUSTRATION OF EPS CALCULATION Example EPS Calculations $ Millions Non-GAAP net earnings Deduct Series A preferred stock dividends $ Hypothetical Earnings Levels for Q1 FY23 145.0 $ 150.0 $ 155.0 $ 165.0 $ 200.0 (6.9) Deduct Series B redeemable preferred dividends (28.7) Add back interest on II-VI Convertible Notes 0.4 (28.7) 0.4 (28.7) 0.4 (28.7) 0.4 0.4 Non-GAAP net earnings available to common shareholders $ 109.8 $ Diluted weighted average common shares Diluted earnings per common share on a non-GAAP basis $ 142.3 0.77 $ 121.7 $ 126.7 $ 136.7 $ 200.4 151.2 151.2 151.2 0.80 $ 0.84 $ 0.90 177.1 $ 1.13 COHERENT Copyright 2022, Coherent. All rights reserved. 32 2

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