Exhibit 99.2

Second Quarter 2017 Results July 20, 2017 Investor Presentation

2017 vs. 2016 P&L Summary Second Quarter 1 2017 2016 Revenue 3,790.1$ 3,884.9$ Operating Expenses (a) 3,224.6 3,323.1 Operating Profit 565.5 561.8 Net Interest Expense 45.3 44.8 Income Tax Expense (b) 166.7 (b) 167.9 Tax Rate % (b) 32.0% (b) 32.5% Income from Equity Method Investments 1.6 2.8 Net Income Attributed To Noncontrolling Interests 26.5 25.8 Net Income - Omnicom Group Inc. 328.6$ 326.1$ Second Quarter July 20, 2017 (a) Additional information on our operating expenses can be found on page 23. (b) O n January 1, 2017, we adopted FASB Accounting Standards Update 2016 - 09, “Compensation – Stock Compensation: Improvements to Employ ee Share - Based Payment Accounting” (ASU 2016 - 09), which requires all additional tax benefits or deficiencies related to share - based compensation to be recognized in results of op erations on the restricted stock vesting date or on the exercise date for stock options. ASU 2016 - 09 is required to be adopted on a prospective basis and retroactive restatement is not permitted. As a result, income tax expense for the three months ended June 30, 2017 reflects a reduction of $2.3 million arising from a larger cash tax deduction as compared to the book tax deduction resulting from the vesting of restricted stock and stock options that were ex erc ised in the three months ended June 30, 2017. The reduction of our income tax expense impacted our tax rate, reducing our effective tax rate by 0.4% to 32.0% for the three months ended June 30, 2017 . The larger tax deduction is primarily due to the increase in the intrinsic value of these awards that resulted from an increase in the price of our common stock since the grant date of the awards.

2017 vs. 2016 Earnings per Share – Diluted Second Quarter 2 2017 2016 Net Income - Omnicom Group Inc. 328.6$ 326.1$ Net Income allocated to participating securities (0.5) (2.0) Net Income available for common shares (a) 328.1$ (a) 324.1$ Diluted Shares (millions) 234.0 239.0 Earnings per Share - Diluted 1.40$ 1.36$ Dividends Declared per Common Share 0.55$ 0.55$ Second Quarter July 20, 2017 (a) On January 1, 2017, we adopted ASU 2016 - 09, as described on page 1. The impact of the adoption of ASU 2016 - 09 increased net income available for common shares for the three months ended June 3 0, 2017 by $2.3 million .

2017 vs. 2016 P&L Summary Year to Date 3 2017 2016 Revenue 7,377.6$ 7,384.0$ Operating Expenses (a) 6,402.1 6,430.1 Operating Profit 975.5 953.9 Net Interest Expense 84.9 84.9 Income Tax Expense (b) 274.7 (b) 283.4 Tax Rate % (b) 30.8% (b) 32.6% Income from Equity Method Investments 1.6 2.6 Net Income Attributed To Noncontrolling Interests 47.1 43.7 Net Income - Omnicom Group Inc. 570.4$ 544.5$ Year to Date July 20, 2017 (a) Additional information on our operating expenses can be found on page 23. (b) O n January 1, 2017, we adopted ASU 2016 - 09 as described on page 1. As a result, income tax expense for the six months ended June 30, 2017 reflects a reduction of $14.8 million arising from a larger cash tax deduction as compared to the book tax deduction resulting from the vesting of restricted stock and stock options that were ex erc ised in the first six months of 2017. The reduction of our income tax expense impacted our tax rate, reducing our effective tax rate by 1.7% to 30.8% for the six months ended June 30, 2017 . The larger tax deduction is primarily due to the increase in the intrinsic value of these awards that resulted from an increase in the price of our common stock since the grant date of the awards.

2017 vs. 2016 Earnings per Share – Diluted Year to Date 4 2017 2016 Net Income - Omnicom Group Inc. 570.4$ 544.5$ Net Income allocated to participating securities (1.0) (3.6) Net Income available for common shares (a) 569.4$ (a) 540.9$ Diluted Shares (millions) 235.2 240.1 Earnings per Share - Diluted 2.42$ 2.25$ Dividends Declared per Common Share 1.10$ 1.05$ Year to Date July 20, 2017 (a) On January 1, 2017, we adopted ASU 2016 - 09, as described on page 1. The impact of the adoption of ASU 2016 - 09 increased net income available for common shares for the six months ended June 30, 2017 by $14.8 million .

2017 Total Revenue Change 5 July 20, 2017 $ % ∆ % ∆ Prior Period Revenue $ 3,884.9 $ 7,384.0 Foreign exchange rate impact (a) (57.2) -1.5% (98.0) -1.3% Acquisition revenue, net of disposition revenue (b) (172.1) -4.4% (196.4) -2.7% Organic growth (c) 134.5 3.5% 288.0 3.9% Current Period Revenue $ 3,790.1 -2.4% $ 7,377.6 -0.1% Second Quarter Year to Date $ (a) Foreign exchange rate impact: calculated by translating the current period’s local currency revenue using the prior period av era ge exchange rates to derive current period constant currency revenue. The foreign exchange rate impact is the difference between the current period revenue in U.S. Dollars and the current period constant cur ren cy revenue. (b) Acquisition revenue, net of disposition revenue: Acquisition revenue is calculated as if the acquisition occurred twelve mont hs prior to the acquisition date by aggregating the comparable prior period revenue of acquisitions through the acquisition date. As a result, acquisition revenue excludes the positive or negative difference betw een our current period revenue subsequent to the acquisition date and the comparable prior period revenue and the positive or negative growth after the acquisition date is attributed to organic growth. Disposition re ven ue is calculated as if the disposition occurred twelve months prior to the disposition date by aggregating the comparable prior period revenue of disposals through the disposition date. The acquisition revenue and dis pos ition revenue amounts are netted in the presentation above. (c) Organic growth: calculated by subtracting the foreign exchange rate impact component and the acquisition revenue, net of disp osi tion revenue component from total revenue growth.

2017 Revenue by Region July 20, 2017 6 Second Quarter North America 57.4% UK 9.2% Euro Markets & Other Europe 17.5 % Asia Pacific 10.7% Latin America 3.2% Africa MidEast 2.0% Year to Date North America 58.5% UK 8.9% Euro Markets & Other Europe 16.8 % Asia Pacific 10.6% Latin America 3.1% Africa MidEast 2.1%

2017 Revenue by Region 7 Second Quarter Year to Date July 20, 2017 $ Mix % Growth % Organic Growth (a) North America 2,175.6$ -6.6% 0.2% UK 350.4 -3.7% 9.3% Euro & Other Europe 662.1 5.1% 7.8% Asia Pacific 405.3 1.3% 7.1% Latin America 121.2 22.5% 5.0% Africa Mid East 75.5 21.2% 20.4% Total 3,790.1$ -2.4% 3.5% $ Mix % Growth % Organic Growth (a) North America 4,314.9$ -3.1% 0.6% UK 659.6 -5.9% 8.7% Euro & Other Europe 1,240.6 4.9% 8.0% Asia Pacific 780.3 3.4% 8.1% Latin America 227.8 30.8% 5.2% Africa Mid East 154.4 29.9% 28.7% Total 7,377.6$ -0.1% 3.9% (a) “Organic Growth” reflects the year - over - year increase in revenue from the prior period, excluding the foreign exchange rate impa ct and acquisition revenue, net of disposition revenue, as defined on page 5.

2017 Revenue by Discipline July 20, 2017 8 Second Quarter [CATEGORY NAME] 7.9% [CATEGORY NAME] 9.0% CRM 29.9% Advertising 53.2% Specialty 7.7% PR 9.0% CRM 29.9% Advertising 53.4% $ Mix % Growth % Organic Growth (a) Advertising $ 2,017.8 -2.3% 4.2% CRM 1,131.9 -4.0% 3.7% PR 342.6 -2.0% -0.3% Specialty 297.8 2.5% 2.2% Total $ 3,790.1 -2.4% 3.5% $ Mix % Growth % Organic Growth (a) Advertising $ 3,938.6 1.8% 5.2% CRM 2,203.0 -4.2% 2.9% PR 667.9 -0.1% 0.7% Specialty 568.1 3.8% 2.7% Total $ 7,377.6 -0.1% 3.9% (a) “Organic Growth” reflects the year - over - year increase or decrease in revenue from the prior period, excluding the foreign exchange rate impact and acquisition revenue, net of disposition reve nue , as defined on page 5. Year to Date

Revenue by Industry July 20, 2017 9 Auto 9% Consumer Products 10% Financial Services 7% Food & Beverage 13% Other 23% Pharma & Health 12% Retail 6% Tech 9% Telcom 5% T&E 6% Year to Date – 2017 Year to Date – 2016 Auto 8% Consumer Products 10% Financial Services 7% Food & Beverage 13% Other 23% Pharma & Health 12% Retail 6% Tech 9% Telcom 5% [CATEGORY NAME] 7%

Cash Flow Performance 10 July 20, 2017 2017 2016 Net Income 617.5$ 588.2$ Depreciation and Amortization Expense 143.8 147.2 Share-Based Compensation Expense 40.0 46.3 Other Items to Reconcile to Net Cash Used in Operating Activities, net (3.8) (17.9) (b) Free Cash Flow (a) 797.5$ 763.8$ (b) Six Months Ended June 30 Additional information regarding our cash flows can be found in our condensed cash flow statement on page 19. (a) The Free Cash Flow amounts presented above are non - GAAP liquidity measures. See page 25 for the definition of this measure and page 22 for the reconciliation of the non - GAAP financial measures, which reconciles Free Cash Flow to the Net Cash Used in Operating Activities for the periods presented above . (b) On January 1, 2017 we adopted ASU 2016 - 09. ASU 2016 - 09 also provided that cash flows related to additional tax benefits or deficiencies related to share - based compensation be classified in operating activities on a retrospective basis. Accordingly, for the six months ended June 30, 2016, free cash flow increased $13.4 million to conform the prior year’s free cash flow to the current presentation. However, as a res ult of the adoption of ASU 2016 - 09, there was no effect on net free cash flow (as detailed on page 11) for the six months ended June 30, 2016 related to the reclassification.

Cash Flow Performance 11 July 20, 2017 2017 2016 Free Cash Flow (a) 797.5$ 763.8$ (b) Primary Uses of Cash: Dividends paid to Common Shareholders 260.7 242.9 Dividends paid to Noncontrolling Interest Shareholders 67.3 52.0 Capital Expenditures 67.9 77.9 Acquisition of Businesses and Affiliates, Acquisition of Additional Noncontrolling Interests, Contingent Purchase Price Payments, net of Proceeds from Investments 73.3 359.7 Stock Repurchases, net of Proceeds from Stock Plans 468.2 365.1 (b) Primary Uses of Cash (a) 937.4 1,097.6 (b) Net Free Cash Flow (a) (139.9)$ (333.8)$ Six Months Ended June 30 Additional information regarding our cash flows can be found in our condensed cash flow statement on page 19. (a) The Free Cash Flow, Primary Uses of Cash and Net Free Cash Flow amounts presented above are non - GAAP liquidity measures. See page 25 or the definition of these measures and page 22 for the reconciliation of non - GAAP financial measures, which reconciles Free Cash Flow to the Net Cash Used in Operating Activities and Net Free Cash Flow to the Net Decrease in Cash and Cash Equivalents for the periods presented above . (b) On January 1, 2017 we adopted ASU 2016 - 09. ASU 2016 - 09 also provides that cash flows related to additional tax benefits or deficiencies related to share - based compensation be classified in operating activities on a retrospective basis. In the prior year the additional benefits or deficiencies were classified in financing activities ( gro uped with stock repurchases and proceeds from stock plans ). As a result of the adoption of ASU 2016 - 09, for the six months ended June 30, 2016 free cash flow increased by $13.4 million to conform to the current presentation, with a corresponding increase in primary uses of cash. However, as a result of the adoption of ASU 2016 - 09, there was no effect on net free cash flow for the six months ended June 30, 2016 related to the reclassification .

Current Credit Picture 12 July 20, 2017 (a) EBITDA is a non - GAAP performance measure. See page 25 for the definition of this measure and page 21 for the reconciliation of non - GAAP financial measures. (b) Net Debt is a non - GAAP liquidity measure. See page 25 for the definition of this measure, which is reconciled in the table above . (c) See pages 16 and 17 for additional information on our Senior Notes. 2017 2016 EBITDA (a) $ 2,320.0 $ 2,249.1 Gross Interest Expense 215.4 197.4 EBITDA / Gross Interest Expense 10.8 x 11.4 x Total Debt / EBITDA 2.1 x 2.2 x Net Debt (b) / EBITDA 1.3 x 1.6 x Debt Bank Loans (Due Less Than 1 Year) $ 19 $ 12 CP & Borrowings Issued Under Revolver - - Senior Notes (c) 4,900 4,900 Other Debt 30 122 Total Debt $ 4,949 $ 5,034 Cash, Cash Equivalents and Short Term Investments 1,874 1,537 Net Debt (b) $ 3,075 $ 3,497 Twelve Months Ended June 30

Historical Returns 13 July 20, 2017 Return on Invested Capital (ROIC) (a) : Twelve Months Ended June 30, 2017 19.9% Twelve Months Ended June 30, 2016 18.4% Return on Equity (b) : 15 Twelve Months Ended June 30, 2017 51.8% Twelve Months Ended June 30, 2016 45.3% (a) Return on Invested Capital is After Tax Reported Operating Profit (a non - GAAP performance measure – see page 25 for the definiti on of this measure and page 22 for the reconciliation of non - GAAP financial measures) divided by the average of Invested Capital at the beginning and the end of the period (book value of all long - term liabilities and short - term interest bearing debt plus shareholders’ equity less cash, cash equivalents and short term investments). (b) Return on Equity is Reported Net Income for the given period divided by the average of shareholders’ equity at the beginning and end of the period.

Net Cash Returned to Shareholders through Dividends and Share Repurchases 14 July 20, 2017 0.6 0.8 1.1 1.4 1.8 2.3 2.8 3.3 3.5 1.5 2.7 3.4 4.4 4.9 5.9 6.6 7.2 7.7 $1.0 $2.0 $2.8 $3.6 $4.5 $5.5 $6.5 $7.6 $8.7 $9.9 $10.5 101% 98% 76% 98% 99% 105% 102% 107% 107% 106% 107% $- $2.0 $4.0 $6.0 $8.0 $10.0 $12.0 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 YTD 2017 Cumulative Cost of Net Shares Repurchased - Payments for repurchases of common stock less proceeds from stock plans. Cumulative Dividends Paid Cumulative Net Income - Omnicom Group Inc. % of Cumulative Net Income Returned to Shareholders - Cumulative Dividends Paid plus Cumulative Cost of Net Shares Repurchased divided by Cumulative Net Income. From 2007 through June 30, 2017, Omnicom distributed 107% of Net Income to shareholders through Dividends and Share Repurchases . $ In Billions

Supplemental Financial Information July 20, 2017 15

Omnicom Debt Structure Bank Loans $19 2026 Senior Notes $1,400 2024 Senior Notes $ 750 2022 Senior Notes $ 1,250 2020 Senior Notes $1,000 2019 Senior Notes $ 500 16 July 20, 2017 The above chart sets forth Omnicom’s debt outstanding at June 30, 2017. The amounts reflected above for the 2019, 2020, 2022, 2024 and 2026 Senior Notes represent the principal amount of these notes at maturity on July 15, 2019, August 15, 2020, May 1, 2022, November 1, 2024 and April 15, 2026, respectively.

Omnicom Debt Maturity Profile 17 July 20, 2017 Other borrowings at June 30, 2017 include short - term borrowings of $19 million which are due in less than one year. For purposes of this presentation we have included these borrowings as outstandi ng through July 31, 2021, the date of expiration of our five - year credit facility. $0 $200 $400 $600 $800 $1,000 $1,200 $1,400 Other Borrowings 2019 Senior Notes 2020 Senior Notes 2022 Senior Notes 2024 Senior Notes 2026 Senior Notes

2017 Acquisition Related Expenditures 18 July 20, 2017 (a) Includes acquisitions of a majority interest in agencies resulting in their consolidation, including additional interest in e xis ting affiliate agencies resulting in majority ownership. (b) Includes the acquisition of additional equity interests in already consolidated subsidiary agencies which are recorded to Equ ity – Noncontrolling Interest. (c) Includes additional consideration paid for acquisitions completed in prior periods. (d) Total Acquisition Expenditures figure is net of cash acquired. Year to Date Acquisition of Businesses and Affiliates (a) 19.5$ Acquisition of Additional Noncontrolling Interests (b) 8.0 Contingent Purchase Price Payments (c) 71.2 Total Acquisition Expenditures (d) 98.7$

Condensed Cash Flow 19 July 20, 2017 2017 2016 Net Income 617.5$ 588.2$ Share-Based Compensation 40.0 46.3 Depreciation and Amortization of Intangible Assets 143.8 147.2 Other Items to Reconcile to Net Cash Used in Operating Activities, net (3.8) (17.9) (a) Changes in Operating Capital (1,128.5) (1,141.5) Net Cash Used in Operating Activities (331.0) (377.7) (a) Capital Expenditures (67.9) (77.9) Proceeds from/(Purchases of) Investments 25.4 (215.3) Acquisition of Businesses and Interest in Affiliates, net of cash acquired (19.5) (267.0) Net Cash Used in Investing Activities (62.0) (560.2) Dividends paid to Common Shareholders (260.7) (242.9) Dividends paid to Noncontrolling Interest Shareholders (67.3) (52.0) (Repayment of)/Proceeds from Short-term & Long-term Debt, net (10.2) 376.3 Stock Repurchases, net of Proceeds from Stock Plans (468.2) (365.1) (a) Acquisition of Additional Noncontrolling Interests (8.0) (44.6) Payment of Contingent Purchase Price Obligations (71.2) (48.1) Other Financing Activities, net (17.1) (34.3) Net Cash Used in Financing Activities (902.7) (410.7) (a) Effect of exchange rate changes on cash and cash equivalents 127.5 49.1 Net Decrease in Cash and Cash Equivalents (1,168.2)$ (1,299.5)$ Six Months Ended June 30 (a) On January 1, 2017 we adopted ASU 2016 - 09. ASU 2016 - 09 also provides that cash flows related to additional tax benefits or deficiencies related to share - based compensation be classified in operating activities on a retrospective basis . In the prior year the additional benefits or deficiencies were classified as net proceeds in financing activities (grouped wit h stock repurchases and proceeds from stock plans). Accordingly, for the six months ended June 30, 2016, net cash used in operating activities decreased $13.4 million and net cash used in financing activities increased $13.4 million to conform to the current presentation. However there was no effect on the net decrease in cash and cash equivalents for the six months ended June 30, 2016 related to the reclassification.

2017 vs. 2016 Non - GAAP Financial Measures – EBITA 20 (a) Additional information regarding our operating expenses can be found on page 23. (b) EBITA is a non - GAAP financial performance measure . Please see page 25 for the definition of this measure and page 21 for the reconciliation of non - GAAP financial measures, which reconciles the EBITA figures presented above to net income for the periods presented above . (c) EBITA Margin is a non - GAAP financial performance measure. Please see page 25 for the definition of this measure, which is calcul ated by dividing EBITA by revenue for the periods presented. 2017 2016 2017 2016 Revenue 3,790.1$ 3,884.9$ 7,377.6$ 7,384.0$ Operating expenses (a) 3,224.6 3,323.1 6,402.1 6,430.1 Operating Profit 565.5 561.8 975.5 953.9 Operating Profit Margin % 14.9% 14.5% 13.2% 12.9% Add back: Amortization of intangible assets 28.5 28.5 58.9 56.8 EBITA (b) 594.0$ 590.3$ 1,034.4$ 1,010.7$ EBITA Margin % (c) 15.7% 15.2% 14.0% 13.7% Second Quarter Year to Date July 20, 2017

Reconciliation of Non - GAAP Financial Measures – EBITA and EBITDA 21 July 20, 2017 The above reconciles the GAAP financial measure of Net Income – Omnicom Group Inc. to the non - GAAP financial measures of EBITDA and EBITA for the periods presented. EBITDA and EBITA, which are defined on page 25, are non - GAAP financial measures within the meaning of applicable SEC rules and regulations. Our credit facility defines EBITDA as earnings before deducting interest expense, income taxes, depreciation and amortization. Our credit facility uses EBITDA to measure our compliance with covenan ts, such as interest coverage and leverage ratios, as presented on page 12 of this presentation. 2017 2016 2017 2016 2017 2016 Net Income - Omnicom Group Inc. $ 328.6 $ 326.1 $ 570.4 $ 544.5 $ 1,174.6 $ 1,115.4 Net Income Attributed to Noncontrolling Interests 26.5 25.8 47.1 43.7 101.5 103.7 Net Income 355.1 351.9 617.5 588.2 1,276.1 1,219.1 Income from Equity Method Investments 1.6 2.8 1.6 2.6 4.5 8.0 Income Tax Expense 166.7 167.9 274.7 283.4 591.7 589.0 Income Before Tax 520.2 517.0 890.6 869.0 1,863.3 1,800.1 Net Interest Expense 45.3 44.8 84.9 84.9 167.1 157.6 Operating Profit 565.5 561.8 975.5 953.9 2,030.4 1,957.7 Amortization of Intangible Assets 28.5 28.5 58.9 56.8 117.4 111.5 EBITA 594.0 590.3 1,034.4 1,010.7 2,147.8 2,069.2 Depreciation 42.6 44.5 84.9 90.4 172.2 179.9 EBITDA $ 636.6 $ 634.8 $ 1,119.3 $ 1,101.1 $ 2,320.0 $ 2,249.1 3 Months Ended June 30 12 Months Ended June 306 Months Ended June 30

Reconciliation of Non - GAAP Financial Measures July 20, 2017 22 2017 2016 Net Cash Used in Operating Activities (331.0)$ (377.7)$ (a) Net Cash Used in Operating Activities items excluded from Free Cash Flow: Changes in Operating Capital (1,128.5) (1,141.5) Free Cash Flow 797.5$ 763.8$ (a) Six Months Ended June 30 2017 2016 Reported Operating Profit 2,030.4$ 1,957.7$ Effective Tax Rate for the applicable period 31.8% (b) 32.7% Income Taxes on Reported Operating Profit 645.7 640.2 After Tax Reported Operating Profit 1,384.7$ 1,317.5$ Twelve Months Ended June 30 2017 2016 Net Decrease in Cash and Cash Equivalents (1,168.2)$ (1,299.5)$ Cash Flow items excluded from Net Free Cash Flow: Changes in Operating Capital (1,128.5) (1,141.5) (Repayment of)/Proceeds from Short-term & Long-term Debt, net (10.2) 376.3 Purchases of Investments - (215.3) Other Financing Activities, net (17.1) (34.3) Effect of exchange rate changes on cash and cash equivalents 127.5 49.1 Net Free Cash Flow (139.9)$ (333.8)$ Six Months Ended June 30 (a) On January 1, 2017 we adopted ASU 2016 - 09. ASU 2016 - 09 also provided that cash flows related to additional tax benefits or deficiencies related to share - based compensation be classified in operating activities on a retrospective basis . In the prior year the additional benefits or deficiencies were classified in financing activities. Accordingly , for the six months ended June 30, 2016, net cash used in operating activities decreased $13.4 million and free cash flow increased $13.4 million to conform to the current presentation. (b) The annualized effective tax rate for the twelve months ended June 30, 2017 includes the impact of the reduction to income ta x e xpense of $14.8 million arising from a larger cash tax deduction as compared to the book tax deduction taken on the share based awards that were vested and exercised in the six months ended June 30, 2017 in connection with the adoption of ASU 2016 - 09 on January 1, 2017, as described on page 1.

Supplemental Information 23 July 20, 2017 2017 % of Rev 2016 % of Rev 2017 % of Rev 2016 % of Rev Revenue 3,790.1$ 3,884.9$ 7,377.6$ 7,384.0$ Operating expenses: Salary and service costs 2,736.1 72.2% 2,824.0 72.7% 5,430.3 73.6% 5,447.3 73.8% Occupancy and other expenses 297.0 7.8% 315.2 8.1% 598.9 8.1% 616.6 8.4% Cost of services 3,033.1 80.0% 3,139.2 80.8% 6,029.2 81.7% 6,063.9 82.1% Selling, general and administrative expenses 120.4 3.2% 110.9 2.9% 229.1 3.1% 219.0 3.0% Depreciation and amortization 71.1 1.9% 73.0 1.9% 143.8 1.9% 147.2 2.0% Total operating expenses 3,224.6 85.1% 3,323.1 85.5% 6,402.1 86.8% 6,430.1 87.1% Operating Profit 565.5$ 561.8$ 975.5$ 953.9$ Net Interest expense: Interest expense 56.8$ 54.3$ 110.2$ 104.6$ Interest income 11.5 9.5 25.3 19.7 Net Interest expense 45.3$ 44.8$ 84.9$ 84.9$ Second Quarter Year to Date

Second Quarter Acquisition July 20, 2017 24 Founded in 2010, MOBILE STRATEGY is a creative full - service digital agency with strong experience in Mobile CRM/loyalty, Mobile Commerce and Mobile Content & Campaigns. Its services include: mobile strategy and insights, mobile design, mobile app development and managed services. Working with leading retailers and customer - facing brands, MOBILE STRATEGY creates integrated, engaging and creative mobile experiences, from strategy to realization . MOBILE STRATEGY, based in Amsterdam, The Netherlands, has been affiliated with TBWA \ Worldwide and will remain within the TBWA \ Netherlands Group.

The preceding materials have been prepared for use in the July 20, 2017 conference call on Omnicom’s results of operations fo r t he period ended June 30, 2017. The call will be archived on the Internet at http://investor.omnicomgroup.com/investor - relations/news - events - and - filings / . Forward - Looking Statements Certain statements in this presentation constitute forward - looking statements, including statements within the meaning of the Pr ivate Securities Litigation Reform Act of 1995. In addition, from time to time, the Company or its representatives have made, or may make, forward - looking statements, orally or in writing. These statements may discuss go als, intentions and expectations as to future plans, trends, events, results of operations or financial condition, or otherwise, based on current beliefs of the Company’s management as well as assumptions made by, and i nfo rmation currently available to, the Company’s management. Forward - looking statements may be accompanied by words such as “aim,” “anticipate,” “believe,” “plan,” “could,” “should,” “would,” “estimate, ” “ expect,” “forecast,” “future,” “guidance,” “intend,” “may,” “will,” “possible,” “potential,” “predict,” “project” or similar words, phrases or expressions. These forward - looking statements are subject to various risks and uncertaint ies, many of which are outside the Company’s control. Therefore, you should not place undue reliance on such statements. Factors that could cause actual results to differ materially from those in the forward - lookin g statements include: international, national or local economic conditions that could adversely affect the Company or its clients; losses on media purchases and production costs incurred on behalf of clients; reductions i n c lient spending, a slowdown in client payments and a deterioration in the credit markets; ability to attract new clients and retain existing clients in the manner anticipated; changes in client advertising, marketin g a nd corporate communications requirements; failure to manage potential conflicts of interest between or among clients; unanticipated changes relating to competitive factors in the advertising, marketing and corporate c omm unications industries; ability to hire and retain key personnel; currency exchange rate fluctuations; reliance on information technology systems; changes in legislation or governmental regulations affecting the Co mpa ny or its clients; risks associated with assumptions the Company makes in connection with its critical accounting estimates and legal proceedings; and the Company’s international operations, which are subject to the ri sks of currency repatriation restrictions, social or political conditions and regulatory environment. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the oth er risks and uncertainties that may affect the Company’s business, including those described in the “Risk Factors” in Omnicom’s Annual Report on Form 10 - K for the year ended December 31, 2016. Except as required under applicable law, the Company does not assume any obligation to update these forward - looking statements. Non - GAAP Financial Measures We present financial measures determined in accordance with generally accepted accounting principles in the United States (“G AAP ”) and adjustments to the GAAP presentation (“Non - GAAP”), which we believe are meaningful for understanding our performance. Non - GAAP financial measures should not be considered in isolation from, or as a su bstitute for, financial information presented in compliance with GAAP. Non - GAAP financial measures as reported by us may not be comparable to similarly titled amounts reported by other companies. We provid e a reconciliation of non - GAAP measures to the comparable GAAP measures on pages 21 and 22. The Non - GAAP measures used in this presentation include the following: Free Cash Flow, defined as net income plus depreciation, amortization, share based compensation expense plus/(less) other items to reconcile to net cash provided by operating activities. We believe Free Cash Flow is a useful measure of liquidity to evaluate our ability to generate excess cash from our operations. Primary Uses of Cash, defined as dividends to common shareholders, dividends paid to non - controlling interest shareholders, capital expe nditures, cash paid on acquisitions, payments for additional interest in controlled subsidiaries and stock repurchases, net of the proceeds and excess tax benefit from our stock plans, and excludes changes in ope rating capital and other investing and financing activities, including commercial paper issuances and redemptions used to fund working capital changes . We believe this liquidity measure is useful in identifying the significant uses of our cash. Net Free Cash Flow, defined as Free Cash Flow less the Primary Uses of Cash. Net Free Cash Flow is one of the metrics used by us to assess our sources and uses of cash and was derived from our consolida ted statements of cash flows. We believe that this liquidity measure is meaningful for understanding our primary sources and primary uses of that cash flow. EBITDA, defined as operating profit before interest, taxes, depreciation and amortization. We believe EBITDA is meaningful operating performance measure because the financial covenants in our credit facilities are based on EBITDA. EBITA, defined as operating profit before interest, taxes and amortization and EBITA margin, defined as EBITA divided by revenue. We use EBITA and EBITA margin as additional operating performance measures, which excludes the non - cash amortization expense of intangible assets (primarily consisting of amortization arising from acquisi tions). Accordingly, we believe it is a useful measure for investors to evaluate the performance of our businesses. Net Debt, defined as total debt less cash, cash equivalents and short - term investments. We believe net debt, together with the compa rable GAAP measures, reflects one of the liquidity metrics used by us to assess our cash management. After Tax Reported Operating Profit, defined as reported operating profit less income taxes calculated using the effective tax rate for the applicable period. Management uses after tax operating profit as a measure of after tax operating performance as it excludes the after tax effects of financing and investing activities on results of operations. Other Information All dollar amounts are in millions except for per share amounts and figures shown on pages 2 and 4 and the net cash returned to shareholders figures on page 14. The information contained in this document has not been audited, although some data has been derived from Omnicom’s historical financial statements, including its audited finan cia l statements. In addition, industry, operational and other non - financial data contained in this document have been derived from sources that we believe to be reliable, but we have not independently verified such info rma tion, and we do not, nor does any other person, assume responsibility for the accuracy or completeness of that information. Certain amounts in prior periods have been reclassified to conform to our current presentat ion . The inclusion of information in this presentation does not mean that such information is material or that disclosure of such inf ormation is required. Disclosure July 20, 2017 25