Third Quarter 2019 Results

Reconciliation of 2018 Non-GAAP Financial Measures Operating Profit Net Income - Omnicom Group Inc. Net Income Attributed to Noncontrolling Interests Net Income Income from Equity Method Investments Income Tax Expense Income Before Tax Net Interest Expense Operating Profit Net gain from dispositions of subsidiaries Repositioning actions Operating Profit, 2018 Non-GAAP Adjusted $ OmnicomGroup $ Three Months Ended September 30 2019 290.2 $ 22.0 312.2 0.5 112.3 424.0 49.3 473.3 473.3 $ 2018 $ Nine Months Ended September 30 2019 924.1 $ 62.0 986.1 298.9 32.4 331.3 1.0 115.3 445.6 56.7 502.3 (178.4) 149.4 473.3 $ 1,475.9 1.2 345.5 1,330.4 145.5 1,475.9 2018 October 15, 2019 927.2 83.6 1,010.8 3.6 343.0 1,350.2 156.1 1,506.3 The above table reconciles the U.S. GAAP financial measure of Operating Profit. to the non-GAAP "Non-GAAP 2018 Adjusted" financial measures of Operating Profit and Operating Margin, which excludes the impact of the net gain recognized on dispositions of certain subsidiaries, certain repositioning actions and the revision of the provisional income tax expense amounts recorded in connection with the enactment of the 2017 Tax Act, for the periods presented. We believe that the amounts presented in "Non-GAAP 2018 Adjusted" figures are useful measures for investors to understand the impact these items had on our reported results. Non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial information presented in compliance with U.S. GAAP. Non-GAAP financial measures reported by us may not be comparable to similarly titled amounts reported by other companies. (178.4) 149.4 1,477.3 30

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