UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934 (Amendment No. )

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OMNICOM GROUP INC.

(Name of Registrant as Specified In Its Charter)
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Proxy Statement

2018
Annual Meeting of
Shareholders

May 22, 2018 at 10:00 a.m. Eastern Daylight Time

15^th Floor Conference Center
220 East 42^nd Street
New York, NY 10017

A Letter from Omnicom’s Board of Directors

To Our Fellow Shareholders:

Over the past few years, the Board has been highly focused on a plan for Board and management succession. The Board has taken several important steps this year to further advance this process and would like to provide an update to our shareholders on key developments.

■ The Board has made great progress on its refreshment initiative. In that effort, we have been focused on ensuring that our Board is representative of all of our constituencies – our clients, our employees, and our shareholders. Through our efforts, we have succeeded in bringing to you a highly talented and diverse Board slate. A majority of Omnicom’s independent directors at the 2018 Annual Meeting will be female. Further, four of our directors are African American and a majority of the Audit, Compensation, and Governance Committees are comprised of female directors, with female directors Chairing both the Audit and Compensation Committees.
 

■ In light of changes underway, the Board appointed three new Committee Chairs – Mary C. Choksi as Chair of the Audit Committee, Robert Charles Clark as Chair of the Governance Committee and Leonard S. Coleman as Chair of the Finance Committee. Susan S. Denison will continue to serve as the Chair of the Compensation Committee.
 

■ Since last year’s Annual Meeting, two new independent directors, Gracia C. Martore and Ronnie S. Hawkins, have been appointed to the Board. Ms. Martore is the former President and Chief Executive Officer of TEGNA Inc. and Mr. Hawkins is a Managing Director, Head of International Investments and member of the Investment Committee of EIG Global Energy Partners. Each of Ms. Martore and Mr. Hawkins bring critical skills to the Board’s overall mix of skill sets which strengthen the Board’s collective ability to effectively oversee management and the implementation of Omnicom’s plan for long-term strategic growth.
 

■ In line with the Board’s previously disclosed retirement age policy, Omnicom’s Executive Board Chair Bruce Crawford is retiring at this year’s Annual Meeting. The entire Board and management team thank Mr. Crawford for his dedicated leadership and the valuable insights he has shared over the years.
 

■ In addition to Mr. Crawford, two other long-serving directors, Jack R. Purcell and John R. Murphy, will also be retiring at this year’s Annual Meeting. As dedicated members of the Board, Mr. Purcell served as Chair of our Governance Committee and Mr. Murphy served as Chair of our Audit Committee. The entire Board and management team thank Messrs. Purcell and Murphy for their longstanding commitment to Omnicom.
 

■ In anticipation of Mr. Crawford’s retirement, the Board spent considerable time reevaluating its leadership structure and assessing various succession options. The Board strongly believes that it needed to maintain flexibility to determine the evolving leadership structure for the Company, and that this must be considered in the context of the specific circumstances, business, culture and unique challenges that the Company faces.
 

■ Ultimately, the Board recognized that it is critical to the future success of our Company for Mr. Wren, our CEO, to serve as Chair upon Mr. Crawford’s retirement. Through extensive shareholder engagement, the Board learned that in light of our strong Lead Independent Director role coupled with the complexity of our Company and our business, shareholders were largely supportive of this Board leadership structure. The Board, upon recommendation of the Governance Committee, therefore unanimously determined that at this time it would be in the best interests of the Company and its shareholders to combine the roles of Chairman and CEO.

In making the decision to appoint CEO John Wren as Chairman, the Board considered the complex nature of our Company and our business, and that our success is based on retaining the most talented individuals to best serve our clients. Ensuring executive-level continuity in the CEO and Chair roles is integral to supporting the transition of these client

2 2018 Proxy Statement

relationships, which have been built on trust and support over many years. The Board also took into consideration our Company’s organizational realignment, which Mr. Wren designed and is implementing to successfully guide our Company through a time of rapid change and disruption within our industry. Market-wide acceleration of technological advances and a shifting competitive landscape that affect Omnicom’s businesses underscore the importance of the changes to Omnicom’s practice areas and the reconstituted reporting structure that Mr. Wren has spearheaded. Mr. Wren’s focus is on leveraging the Company’s existing network and client service matrix organizational structures to build a best in class leadership team and position Omnicom for sustainable long-term growth in an increasingly complex global landscape. As we undergo this next phase of strategic realignment, Mr. Wren’s guidance and leadership will continue to be critical. At the same time, the Board recognized the importance of identifying and developing a strong internal bench of future Omnicom leaders and made progress against this initiative.

The Board carefully considered shareholder perspectives on Omnicom’s leadership structure through extensive outreach conducted over the last seven months. Omnicom reached out to shareholders representing more than 70% of our outstanding shares and engaged with the holders of approximately 40% as part of our continued efforts to foster an open dialogue with shareholders. We explained the reasons why it is critical to our business that Mr. Wren serve as both Chair and CEO and the vast majority of investors who accepted our offer to engage agreed with our case-by-case approach considering relevant factors. These investors indicated a preference for independent leadership on the Board, and were supportive of a lead independent director provided the scope and nature of the role were robust and well-defined. The Board believes that the Lead Independent Director structure it has maintained exceeds these requirements and has and will continue to provide significant value during this period of transition. Our Lead Independent Director role at Omnicom includes significant responsibilities, similar to those typically associated with a Chair (see page 26 for a full list of these responsibilities). Leonard S. Coleman is our Lead Independent Director, and it is anticipated that he will continue in this role over the next several years to provide continuity and stability while we experience change at the Board and management levels. Mr. Coleman has been an active participant in our dialogue with shareholders and has engaged directly on this topic, as well as others discussed in more detail in our proxy statement.

In addition to Mr. Coleman’s leadership, the Board also recognizes that the collective abilities and strengths of each of our directors promotes a culture of transparency and accountability that has guided, and will continue to guide, our successful performance – regardless of the form in which we provide for independent leadership.

The Independent Members of Your Board of Directors

Leonard S. Coleman, Jr.	Alan R. Batkin	Mary C. Choksi	Robert Charles Clark
Lead Independent Director
Susan S. Denison	Ronnie S. Hawkins	Deborah J. Kissire	Gracia C. Martore
John R. Murphy	John R. Purcell	Linda Johnson Rice	Valerie M. Williams

www.omnicomgroup.com 3

NOTICE OF 2018 ANNUAL MEETING OF
SHAREHOLDERS

Subject:

1.	Elect the directors named in the Proxy Statement accompanying this notice to the Company’s Board of Directors to serve until the Company’s 2019 Annual Meeting of Shareholders or until the election and qualification of their respective successors.
2.	Vote on an advisory resolution to approve executive compensation.
3.	Ratify the appointment of KPMG LLP as our independent auditors for the fiscal year ending December 31, 2018.
4.	Vote on the shareholder proposal described in the accompanying Proxy Statement, if properly presented at the 2018 Annual Meeting of Shareholders.

The Board unanimously recommends that you vote:

■ FOR each of the director nominees;

■ FOR the advisory resolution to approve executive compensation;

■ FOR the ratification of the appointment of KPMG LLP as our independent auditors; and

■ AGAINST the shareholder proposal described in the accompanying Proxy Statement.

Shareholders will also transact any other business that is properly presented at the meeting. At this time, we know of no other matters that will be presented.

In accordance with the rules promulgated by the U.S. Securities and Exchange Commission, we sent a Notice of Internet Availability of Proxy Materials on or about April 12, 2018, and provided access to our proxy materials on the Internet, beginning on April 12, 2018, for the holders of record and beneficial owners of our common stock as of the close of business on the record date.

Please sign and return your proxy card or vote by telephone or Internet (instructions are on your proxy card), so that your shares will be represented at the 2018 Annual Meeting of Shareholders, whether or not you plan to attend. If you do attend, you will be asked to present valid photo identification, such as a driver’s license or passport, before being admitted. Cameras, recording devices and other electronic devices will not be permitted at the meeting. Additional information about the meeting is included below in this Proxy Statement in the section entitled “Information About Voting and the Meeting.”

Michael J. O’Brien
Secretary

New York, New York
April 12, 2018

Meeting Date:

Tuesday, May 22, 2018

Time:

10:00 a.m. Eastern Daylight Time

Place:

15^th Floor Conference Center
220 East 42^nd Street
New York, NY 10017

Record Date:

April 2, 2018

4 2018 Proxy Statement

PROXY SUMMARY

This summary highlights selected information about the items to be voted on at the 2018 Annual Meeting of Shareholders. This summary does not contain all of the information that you should consider in deciding how to vote. You should read the entire proxy statement carefully before voting.

Meeting Agenda and Voting Recommendations

ITEM 1:  Election of Directors

The Board recommends a vote FOR each of the director nominees. ■We have conducted a comprehensive evaluation of director skill sets to ensure that each director's unique qualifications and attributes collectively support the oversight of Omnicom's management. ■A majority of our director nominees are female and four are African American. Diversity is a core value at every level of our organization. ■Ten of Omnicom’s eleven director nominees are independent and each of the Audit, Compensation, Governance and Finance Committees is Chaired by an independent director. ■Each of our directors is elected annually by majority vote.   See page 11
for further
information

DIRECTOR NOMINEES

	Name and Age	Principal Occupation	Director Since	Omnicom Committees	Other Current Public Company Boards
	Alan R. Batkin, (I), 73	Chairman and Chief Executive Officer of Converse Associates, Inc.	2008	C	■Cantel Medical Corp.
				F	■Pattern Energy Group, Inc.
	Mary C. Choksi, (I), 66	Former Founding Partner and Senior Manager of Strategic Investment Group	2011	A (Chair)	■Avis Budget Group
				C	■White Mountains Insurance Group, Ltd.
	Robert Charles Clark, (I), 74	Harvard University Distinguished Service Professor, Harvard Law School	2002	A	■Time Warner Inc.
				G (Chair)
	Leonard S. Coleman, Jr., (I), 69 Lead Independent Director	Former Senior Advisor, Major League Baseball Former Chairman, Arena Co.	1993	C	■Avis Budget Group
				G	■Electronic Arts Inc.
				F (Chair)	■Hess Corporation
	Susan S. Denison, (I), 71	Former Partner, Cook Associates	1997	C (Chair)
				G
NEW	Ronnie S. Hawkins, (I), 49	Managing Director, Head of International Investments and member of the Investment Committee, EIG Global Energy Partners	2018	F
	Deborah J. Kissire, (I), 60	Former Vice Chair and Regional Managing Partner, EY	2016	A	■Cable One, Inc.
				F	■Axalta Coating Systems Ltd.
NEW	Gracia C. Martore, (I), 66	Former President and Chief Executive Officer, TEGNA Inc.	2017	A	■WestRock Company
				G	■United Rentals, Inc.
	Linda Johnson Rice, (I), 60	Chairman and Chief Executive Officer, Johnson Publishing Company and Fashion Fair Cosmetics	2000	G	■Tesla, Inc.
				C	■Grubhub Inc.
	Valerie M. Williams, (I), 61	Former Southwest Assurance Managing Partner, EY	2016	A	■WPX Energy, Inc.
				F
	John D. Wren, 65	President and Chief Executive Officer, Omnicom	1993

(I): Independent A: Audit C: Compensation F: Finance G: Governance

www.omnicomgroup.com 5

PROXY SUMMARY

Board Snapshot

Independence	Diversity
10 of 11 are independent	Women & Multicultural Directors
Current Tenure of 2018 Nominees	Experience and Skills
		Our director nominees are accomplished leaders who bring a mix of experiences and skills to the Board.
		Our Board has identified skill categories fundamental to its ability to effectively oversee Omnicom's strategy and management, and undertakes a comprehensive evaluation to ensure these skills are well represented on the Board.
		See page 12 for further information.

Omnicom has an engaged Board: 100% meeting attendance in 2017.

GOVERNANCE HIGHLIGHTS

The Board has adopted, and periodically reviews, policies and procedures to guide it in its oversight responsibilities. These policies and procedures provide a framework for the proper operation of our company and align with shareholders' interests.

Shareholder Rights	Independent Oversight	Good Governance
Annual election of all directors Majority voting standard in uncontested elections Proxy access rights Right to call a special meeting of the Board Continued efforts to foster a successful shareholder outreach program	Engaged Lead Independent Director with clear responsibilities All directors are independent except the CEO Executive sessions of our independent non-management directors Independent Board committees Comprehensive oversight of strategy and risk	Annual Board and Committee evaluations and skill set assessment Director orientation and continuing education Strong equity ownership requirement for executives (3x to 6x base salary) Robust processes for confidential and anonymous submission by employees of concerns regarding accounting or auditing matters, as well as potential violations of our Code of Business Conduct or Code of Ethics for Senior Financial Officers

6 2018 Proxy Statement

PROXY SUMMARY

SHAREHOLDER ENGAGEMENT

Ongoing shareholder engagement is a priority for our Board and management team. In 2017, we reached out to shareholders holding more than 70% of our outstanding shares and engaged with approximately 40% of outstanding shares. Mr. Coleman, our Lead Independent Director, actively participated in investor meetings with over 20% of outstanding shares. Broad topics discussed included:

■ Company strategy and performance

■ Board composition, refreshment and leadership

■ Inclusion and diversity efforts across the organization

■ Sustainability initiatives

■ Executive compensation program

Below is a summary of topics discussed in all shareholder meetings along with the actions taken by our Board:

Key topics discussed with shareholders	Board actions
Board Leadership – The majority of our shareholders indicated they were supportive of combining the Chair and CEO positions given our strong Lead Independent Director role and the complex nature of our Company and our business	■Based on shareholder feedback, we elected a new director to serve as Lead Independent Director in December 2015 who was re-elected by the independent directors in May 2016 and 2017 ■The role and responsibilities of our Lead Independent Director are robust and clearly defined
Board Refreshment – Shareholders were pleased with the level of progress we have shown to meaningfully refresh our Board	■The Board has implemented a thoughtful approach to refreshment, including adoption of a mandatory retirement policy, which is fostering a smooth transition ■Two directors stepped down from the Board in 2016 and a third stepped down in 2017 ■Our Chairman and two additional directors will step down from the Board at the 2018 Annual Meeting ■From March 2016 – February 2018, the Board appointed four new independent directors ■The Board anticipates continued Board refreshment over the next few years and will continue its search for qualified director candidates, with ongoing assistance by a third-party search firm

We appreciated the insights and perspectives of our shareholders, which were discussed among the full Board and factored into its decision making process for the year.

www.omnicomgroup.com 7

PROXY SUMMARY

ITEM 2:  Advisory Resolution to Approve Executive Compensation

The Board recommends a vote FOR this voting item. ■We closely tie pay to current and long-term Company performance; ■We maintain a high degree of variable, “at-risk” compensation; ■We establish challenging performance metrics that align with our business strategy; and ■We sustain competitive compensation levels. See page 33
for further
information

EXECUTIVE COMPENSATION HIGHLIGHTS

Omnicom strives to closely link executive compensation to performance by making a significant portion of potential compensation variable, or “at-risk”, as well as long-term performance driven. In 2017, we compensated our named executives using the following elements for total target direct compensation.

Description			4% of our CEO’s 2017 compensation was base salary. For each NEO, the majority of total compensation is variable and based on performance.
Base Salary	Fixed amount based on responsibilities, experiences and market data.
Annual Cash Incentive	Awards are based on goals that are meaningful and challenging, and designed to drive shareholder value.		96% of our CEO’s 2017 compensation was variable and based on performance
Performance Restricted Stock Units (2021 vesting)	The Performance Restricted Stock Units (the “PRSU”) awards are contingent upon further performance conditions of the Company by tying the percentage of the award that is earned after a three-year period to the Company’s return on equity for that future three-year period compared to our Peer Metric Group.		43% of our CEO’s 2017 compensation was also contingent upon the future performance of the Company.

Compensation Best Practices
	Emphasis on performance-based compensation
	Executive and director stock ownership guidelines (6x base salary for CEO; 3x base salary for CFO)
	Policy adopting equity grant best practices
	Compensation forfeiture/clawback policy
	Policy prohibiting hedging of company equity securities

8 2018 Proxy Statement

PROXY SUMMARY

ITEM 3:  Ratify the appointment of KPMG LLP as our independent auditors for the fiscal year ending December 31, 2018.

The Board recommends a vote FOR this voting item. See page 65
for further
information

ITEM 4: Shareholder Proposal Regarding the Ownership Threshold for Calling Special Shareholder Meetings

The Board recommends a vote AGAINST this voting item. See page 67
for further
information

www.omnicomgroup.com 9

TABLE OF CONTENTS

Notice of 2018 Annual Meeting of Shareholders		4
Proxy Summary		5
Proxy Statement		11
ITEM 1	Election of Directors	11
Omnicom Board of Directors		11
Board’s Role and Responsibilities		21
Diversity and Corporate Responsibility		23
Communications with Shareholders		24
Board Leadership Structure		25
Board Policies and Processes		29
Directors’ Compensation for Fiscal 2017		31
ITEM 2	Advisory Resolution to Approve Executive Compensation	33
2017 CEO Compensation		33
Executive Compensation		35
Executive Summary		36
Compensation Committee Report		42
Compensation Discussion & Analysis		43
Summary Compensation Table for 2017		58
Grants of Plan-Based Awards in 2017		59
Outstanding Equity Awards at 2017 Year-End		59
Option Exercises and Stock Vested in 2017		60
Nonqualified Deferred Compensation in 2017		60
Potential Payments Upon Termination of Employment or Change in Control		61
Pay Ratio Disclosure		64
ITEM 3	Ratification of the Appointment of Independent Auditors	65
Fees Paid to Independent Auditors		65
Audit Committee Report		66
ITEM 4	Shareholder Proposal Regarding the Ownership Threshold for Calling Special Shareholder Meetings	67
Stock Ownership Information		69
Beneficial Ownership of Certain Beneficial Owners and Management		69
Equity Compensation Plans		71
Section 16(a) Beneficial Ownership Reporting Compliance		72
Information About Voting and the Meeting		73
Record Date Shares Outstanding		73
Quorum; Required Vote; Effect of an Abstention and Broker Non-Votes		73
Voting		73
Voting by Street Name Holders		74
“Default” Voting		74
Right to Revoke		74
Tabulation of Votes		74
Additional Information		75
Expense of Solicitation		75
Incorporation by Reference		75
Availability of Certain Documents		75
Delivery of Documents to Shareholders Sharing an Address		75
Shareholder Proposals and Director Nominations for the 2019 Annual Meeting		76
Annex A		77
Non-GAAP Financial Information		77

10 2018 Proxy Statement

PROXY STATEMENT
ITEM 1 — ELECTION OF DIRECTORS

Omnicom Board of Directors

The Board of Directors of Omnicom Group Inc., a New York corporation (“Omnicom,” the “Company,” “we,” “us” or “our”), currently consists of 14 directors: 12 independent directors, Bruce Crawford, our Chairman of the Board, and John D. Wren, our President and Chief Executive Officer. Each director stands for election annually and is elected by a majority of votes cast (in an uncontested election). Our Board values the views of our investors regarding board composition and, in response to investor input, has made board refreshment a priority. As part of this ongoing board refreshment process:

■ After many years of dedicated leadership, and pursuant to the Board’s previously disclosed director retirement policy, Bruce Crawford, the Chairman of our Board, is retiring at our 2018 Annual Meeting.

■ In addition, two independent Board members, John R. Murphy and Jack R. Purcell, are also not being nominated for re-election at the 2018 Annual Meeting in light of the retirement age policy.

■ Our Board succession planning process resulted in the addition of two new independent directors who bring important and complementary skills to the Board’s overall composition.

	Gracia C. Martore, the former President and Chief Executive Officer of TEGNA Inc., joined our Board and Audit Committee in July of 2017 and Governance Committee in March of 2018.
	Most recently, Ronnie S. Hawkins, a Managing Director, Head of International Investments and member of the Investment Committee of EIG Global Energy Partners, joined our Board and Finance Committee in February of 2018.

As a result of these changes to our Board’s composition, we expect that following the 2018 Annual Meeting, our Board will consist of 11 directors, 10 of whom will be independent. We anticipate continued Board refreshment over the next few years and remain focused on ensuring a smooth transition and onboarding process for new directors.

DIRECTOR TENURE & REFRESHMENT: SIGNIFICANT REFRESHMENT REALIZED SINCE 2015

A balanced mix of fresh perspectives and institutional knowledge enables strong Board oversight of management. The 2018 director tenure chart below illustrates this balance and highlights the meaningful board refreshment that has been underway over the last several years.

Current Tenure of 2018 Director Nominees

www.omnicomgroup.com 11

ITEM 1 — ELECTION OF DIRECTORS

■ In response to shareholder feedback on lengthy average Board tenure, the Board implemented a thoughtful refreshment plan, which included the adoption of a mandatory retirement age policy which went into effect on December 31, 2017, enabling a smooth transition process.

■ Our Chairman, Bruce Crawford, is retiring at the 2018 Annual Meeting.

■ Two directors retired in 2016, an additional director retired in 2017 and two more independent directors are not being nominated for re-election at our 2018 Annual Meeting.

■ Two independent directors joined the Board in 2016, another independent director joined the Board in 2017 and a fourth independent director joined the Board in 2018.

QUALIFICATIONS OF THE MEMBERS OF THE BOARD

In determining the nominees for the Board, our Governance Committee considers the criteria outlined in our Corporate Governance Guidelines including a nominee’s independence, their background and experience in relation to other members of the Board, and his or her ability to commit the time and focus required to discharge Board duties. In addition, our Governance Committee considers the composition of the Board as a whole and diversity in its broadest sense, including persons diverse in gender and ethnicity as well as diversity of viewpoints, ages, and professional and life experiences. The Governance Committee considers a broad spectrum of skills and experience to ensure a strong and effective Board and nominees are neither chosen nor excluded solely or largely based on any one factor.

Our Board seeks to align our directors’ collective expertise with those areas most important to strong oversight of management at Omnicom. Accordingly, we periodically evaluate Board composition to help inform Board succession planning efforts, maintain close alignment between Board skills and Omnicom’s long-term strategy, and promote Board effectiveness. In 2017, we implemented a rigorous skills analysis for each of our directors and found that those skill categories with the highest aggregate level of director experience, namely Talent Management, Finance & Accounting, and Risk Management & Controls, align with the areas most critical to Board oversight at Omnicom. The chart below outlines the skill and experience categories our Board evaluated this past year, as well as the importance of each category to overall Board effectiveness.

Risk Management & Controls		Robust risk management is a foundational component of strong Board oversight, and we believe that the Board must include directors who possess a sophisticated ability to understand, measure and mitigate risk.
Finance & Accounting		Financial and accounting expertise is essential to ensuring the integrity of our internal controls, critically evaluating our performance, and providing insight and counsel with respect to our financial reporting, capital structure and approach to capital allocation.
Talent Management		Our ability to attract and retain the most talented professionals is fundamental to our business success, and the Board’s oversight function is particularly critical with respect to succession planning for our senior leadership team, and ensuring that we continue to prioritize diversity and inclusion.
Strategic Planning		Our Board’s ability to effectively review and assess the long-term strategic priorities developed by management, as well as management’s execution against those priorities, is fundamental to our capacity to grow, innovate and create shareholder value.
Industry Experience		Directors with experience relevant to our industry are well-suited to help guide the company in key areas of our business such as advertising, customer relationship management, media buying, public relations and healthcare, and to assess growth opportunities, whether organic or through acquisitions.
CEO Experience		We believe that experience serving as a CEO enables directors to contribute deep insight into business strategy and operations, positioning the Board to serve as a valuable thought leader and challenge key assumptions while overseeing management.

12 2018 Proxy Statement

ITEM 1 — ELECTION OF DIRECTORS

Legal / Regulatory		Our Board must be able to effectively evaluate Omnicom‘s legal risks and obligations, as well as the complex, multinational regulatory environments in which our businesses operate, to help protect Omnicom’s reputational integrity and promote long-term success.
International Business		Because of Omnicom’s global scale, it is key for our directors to bring experience in international markets and business operations, so that our Board is well-positioned to evaluate opportunities for growth outside of the U.S.
Technology		Technological experience enables our directors to provide important insight as we navigate a time of rapid technological advancement industry-wide.
Public Company Board Experience		Through their experience serving on the boards of other large publicly traded companies, directors bring a valuable understanding of independent oversight.

In addition to possessing the skills discussed above, each of our independent directors must also demonstrate sound judgment, integrity of thought, ethical behavior, critical insight into Omnicom’s businesses, the ability to ask challenging questions of management, and a healthy respect for their fellow Board members.

2018 DIRECTOR NOMINEES (11 TOTAL)

Independence	Diversity

www.omnicomgroup.com 13

ITEM 1 — ELECTION OF DIRECTORS

2018 DIRECTOR NOMINEES

Of the current 14 members of the Board, 11 have been nominated to continue to serve as directors for another year, while our Chairman and two additional independent directors will not stand for re-election in connection with our board refreshment initiative. All 11 director nominees have been recommended for election to the Board by our Governance Committee and approved and nominated for election by the Board. A third-party search firm was hired and used to assist with the evaluation of Ms. Martore and Mr. Hawkins as director candidates.

The Board has no reason to believe that any of the nominees would be unable or unwilling to serve if elected. If a nominee becomes unable or unwilling to accept nomination or election, the Board may, prior to the meeting, select a substitute nominee or undertake to locate another director after the meeting. If you have submitted a proxy and a substitute nominee is selected, your shares will be voted for the substitute nominee.

The Board UNANIMOUSLY recommends that shareholders vote FOR all nominees.

PROFESSIONAL EXPERIENCE: Mr. Wren is President and Chief Executive Officer of Omnicom, a position he has held since January 1997. He was elected President in 1996 and named Chief Executive Officer in 1997. Under his direction, Omnicom has become one of the largest advertising, marketing and corporate communications companies in the world. Mr. Wren entered the advertising business in 1984, joining Needham Harper Worldwide as an executive vice president. As part of the team that created Omnicom in 1986, he was appointed Chief Executive Officer of Omnicom’s DAS Group of Companies division in 1990. KEY SKILLS AND QUALIFICATIONS: Through the positions Mr. Wren has held at Omnicom and its networks, including that of President and Chief Executive Officer of Omnicom since January 1997, Mr. Wren possesses an in-depth understanding of the Company’s complex global businesses and strategy. As the former Chief Executive Officer of Omnicom’s DAS Group of Companies division, Mr. Wren has tremendous advertising, marketing and corporate communications experience. Under his leadership, the DAS Group of Companies grew to become Omnicom’s largest operating group, comprised of companies in a wide array of disciplines ranging from public relations to branding. Together with his strategic vision, Mr. Wren’s vast knowledge of Omnicom, its businesses, its clients and its people enables him to provide important insights to the Board. In fact, Mr. Wren’s extensive and long-term relationships with key clients, coupled with relationships with key management around the world that he has developed over many years, serve as a critical component of the Board’s overall skill-set. Mr. Wren is also a member of the International Business Council of the World Economic Forum, and as such, he has direct exposure to the dynamic issues facing a myriad of international companies. This exposure is a valuable asset to the Company and enhances the Board’s ability to judiciously oversee management of Omnicom’s own complex global businesses.

John D. Wren Age 65 Director since 1993

14 2018 Proxy Statement

ITEM 1 — ELECTION OF DIRECTORS

Alan R. Batkin Age 73 Director since
2008
Member of the Compensation and Finance Committees PROFESSIONAL EXPERIENCE: Mr. Batkin is Chairman and Chief Executive Officer of Converse Associates, Inc., a strategic advisory firm, a position he has held since January 2013. From February 2007 to December 2012, he was the Vice Chairman of Eton Park Capital Management, L.P., a multi-disciplinary investment firm. From 1990 to 2007, he was Vice Chairman of Kissinger Associates, Inc., a geopolitical consulting firm that advises multi-national companies. OTHER PUBLIC COMPANY BOARDS: Mr. Batkin is a director, member of the Audit Committee, Chairman of the Compensation Committee and Presiding Director of Cantel Medical Corp. (listed on NYSE), a provider of infection prevention and control products in the healthcare market, and a director, Chairman of the Board and member of the Conflicts, Nominating, Governance and Compensation Committees and Interim Chairman of the Audit Committee of Pattern Energy Group, Inc. (listed on Nasdaq), an independent power company. Mr. Batkin also served as a director of Hasbro, Inc. during the last five years. KEY SKILLS AND QUALIFICATIONS: The selection of Mr. Batkin as a director nominee was partly grounded in the fact that his 16 years of experience as the Vice Chairman of a geopolitical consulting firm advising multinational companies brings to the Board a genuine comprehension and knowledge of the strategy and management of a dynamic and global business. Mr. Batkin understands the complex relationships crucial to successfully running international businesses, as well as the sophisticated strategies involved in expanding international business operations and mitigating risk in foreign countries. Growing Omnicom’s non-U.S. operations is critical to our long-term business strategy and Mr. Batkin’s expertise in this regard is a critical component of the Board’s mix of skill sets. Mr. Batkin’s service as a director of a company in the healthcare market lends valuable insight into Omnicom’s healthcare businesses. Having worked for more than 22 years in senior investment banking and accounting positions, Mr. Batkin also has high-level financial experience and can provide the Board with valuable input relating to matters of corporate finance and asset management. This experience is additive not only to his role as a director, but also to his service as a member of our Finance Committee. In addition, Mr. Batkin has extensive experience serving on the boards and audit and compensation committees of several public companies in a variety of industries.

Mary C. Choksi Age 66 Director since
2011
Chair of the Audit Committee and Member of the Compensation Committee PROFESSIONAL EXPERIENCE: From 1987 to 2017, Ms. Choksi was a founding partner and Senior Manager of Strategic Investment Group, an investment management enterprise which designs and implements global investment strategies for large institutional and individual investors. In addition, Ms. Choksi is a trustee of a number of funds in the Franklin Templeton Funds family. Ms. Choksi was also a founder and, until May 2011, a Managing Director of Emerging Markets Management LLC, which manages portfolios of emerging market equity securities, primarily for institutional investors. Prior to 1987, Ms. Choksi worked in the Pension Investment Division of the World Bank. OTHER PUBLIC COMPANY BOARDS: Ms. Choksi is a director and member of the Audit and Governance Committees of Avis Budget Group (listed on Nasdaq), a leading rental car supplier, and a director of White Mountains Insurance Group, Ltd. (listed on NYSE), a company whose principal businesses are conducted through its insurance subsidiaries and other affiliates. KEY SKILLS AND QUALIFICATIONS: With her extensive investment management experience, Ms. Choksi brings to the Board a sophisticated comprehension of the financial matters inherent to running a global business enterprise. It is central to Omnicom’s growth and successful financial performance that the Board of Directors’ knowledge base includes Ms. Choksi’s understanding of the utilization of assets to generate growth. Ms. Choksi was a founding partner and Senior Managing Director of the investment management enterprise Strategic Investment Group and a founder, and, until May 2011, a Managing Director of Emerging Markets Management, which manages portfolios of emerging markets securities, primarily for institutional investors. As such, Ms. Choksi has the highest level of experience managing assets, evaluating investment risk, developing investment strategies and determining the optimal use of corporate assets. In addition, Ms. Choksi’s career includes 10 years of experience at the World Bank, primarily working in the Bank’s development arm focusing on projects in South and Southeast Asia. Through this role, Ms. Choksi acquired a keen appreciation of the many challenges facing a multinational institution as it navigates foreign markets and hones its global investment strategies. Collectively, this experience and learning is an extremely valuable component of the overall mix of skills necessary for the Board to effectively oversee the development of Omnicom’s diversified global businesses. In addition, Ms. Choksi’s breadth of experience significantly benefits Omnicom’s Audit Committee on which she serves as Chair, and Compensation Committee on which she serves as a member. Ms. Choksi also has considerable experience as a member of the board and audit committees of other public companies.

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ITEM 1 — ELECTION OF DIRECTORS

Robert Charles Clark Age 74 Director since
2002
Chair of the Governance Committee and Member of the Audit Committee PROFESSIONAL EXPERIENCE: Mr. Clark is a Harvard University Distinguished Service Professor, Harvard Law School, a position he has held since 2003. His research and teaching interests are centered on corporate governance. Previously, he was Dean and Royall Professor of Law at Harvard Law School from July 1989 through June 2003. He has served as a professor of law at Harvard Law School since 1978, and before that, was a tenured professor at Yale Law School. His concentration was corporate law. In addition, Mr. Clark was an associate at Ropes & Gray from 1972 to 1974. For 28 years, until July 2016, Mr. Clark served as a trustee of Teachers Insurance and Annuity Association (TIAA), the giant pension fund serving the higher education community, and for much of that time he chaired the TIAA Nominating and Governance Committee. OTHER PUBLIC COMPANY BOARDS: Mr. Clark is the Lead Independent Director, a member of the Audit Committee and Chairman of the Nominating and Governance Committee of Time Warner Inc. (listed on NYSE), a media and entertainment company. KEY SKILLS AND QUALIFICATIONS: As one of the foremost authorities on corporate governance matters in the world, Mr. Clark provides the Board with the highest level of corporate governance expertise and a substantial knowledge of corporate law. Mr. Clark possesses an acute appreciation for the intricacies of corporate law and a tremendous knowledge of corporate governance best practices. Mr. Clark’s corporate governance and compliance expertise is particularly beneficial to his service as Chair of Omnicom’s Governance Committee. In addition, Mr. Clark has valuable accounting experience through the position he has held as dean of a leading law school responsible for all aspects of its management, including financial. Mr. Clark also has extensive public and private company board experience and serves as a member of the Audit Committee and Chairman of the Nominating and Governance Committee of Time Warner. He previously served as Chair of the Nominating and Governance Committee and a member of the Human Resources, Corporate Governance and Social Responsibility, and Executive Committees of TIAA. Through his service on the boards of both corporate institutions such as Time Warner and financial institutions such as TIAA, as well as the boards of other large public companies, Mr. Clark possesses an in-depth knowledge of the financial management and business operations and strategies of a global enterprise.

Leonard S. Coleman, Jr. Age 69 Director since
1993 Lead Independent Director, Chair of the Finance Committee and Member of the Compensation and Governance Committees PROFESSIONAL EXPERIENCE: Mr. Coleman was Senior Advisor, Major League Baseball, from 1999 through 2005. Previously, he was Chairman of Arena Co., a subsidiary of Yankees/Nets, until September 2002. Before that, he was President, National League, Major League Baseball from 1994 to 1999, having previously served since 1992 as Executive Director, Market Development of Major League Baseball. Additionally, Mr. Coleman was previously a municipal finance banker for Kidder, Peabody & Company. Prior to joining Kidder, Mr. Coleman served as Commissioner of both the New Jersey Department of Community Affairs and Department of Energy, and Chairman of the Hackensack Meadowlands Development Commission and the New Jersey Housing and Mortgage Finance Agency. Mr. Coleman was also the Vice Chairman of the State Commission on Ethical Standards and a member of the Economic Development Authority, Urban Enterprise Zone Authority, Urban Development Authority, State Planning Commission and New Jersey Public Television Commission. He has also served as President of the Greater Newark Urban Coalition and worked in a management consulting capacity throughout Africa. OTHER PUBLIC COMPANY BOARDS: Mr. Coleman is a director, Chairman of the Corporate Governance Committee and member of the Compensation Committee of Avis Budget Group (listed on Nasdaq), a leading rental car supplier. Mr. Coleman also serves as a director and member of the Compensation and Nominating and Governance Committees of Electronic Arts Inc. (listed on Nasdaq), a company that develops, markets, publishes and distributes video games, and as a director and member of the Governance Committee of Hess Corporation (listed on NYSE), an energy company engaged in the exploration and production of crude oil and natural gas. Mr. Coleman also served as a director of Aramark Corporation, Churchill Downs Inc. and H.J. Heinz Corporation during the last five years. KEY SKILLS AND QUALIFICATIONS: Omnicom and its Board of Directors benefit from the diverse business experience that Mr. Coleman has acquired over his career, including during more than a decade of senior management experience in Major League Baseball, including as President of the National League. Mr. Coleman gained significant financial experience through his years of working as a municipal finance banker at Kidder Peabody, a background which is valuable to his service as Chair of Omnicom’s Finance Committee. Further, he has extensive government experience having served as Commissioner of the New Jersey Department of Community Affairs where his responsibilities included overseeing all local and county budgets. As Commissioner of New Jersey’s Department of Energy, he developed energy policy for the state. In addition, Mr. Coleman was Chairman of the Hackensack Meadowlands Development Commission developing zoning regulations for the area. Collectively, these roles imbued Mr. Coleman with a keen sense of managing risks, which is an important skill for service as a director. Mr. Coleman also lived overseas for several years serving as a management consultant. Mr. Coleman’s experiences and qualifications also include active involvement on the boards of a number of large public companies, providing him with a deep understanding of the operational and financial aspects of businesses, both domestic and international.

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Susan S. Denison Age 71 Director since
1997
Chair of the Compensation Committee and Member of the Governance Committee PROFESSIONAL EXPERIENCE: Ms. Denison is a former partner of Cook Associates, a retained executive search firm, a position she held from June 2001 to April 2015. Ms. Denison has more than twenty years of senior executive experience within the media, entertainment and consumer products industries. She formerly served as a Partner at TASA Worldwide/ Johnson, Smith & Knisely and the Cheyenne Group. She has also served as Executive Vice President, Entertainment and Marketing for Madison Square Garden, Executive Vice President and General Manager at Showtime Networks’ Direct-To-Home Division, Vice President, Marketing for Showtime Networks and Senior Vice President, Revlon. In addition, Ms. Denison previously held marketing positions at Charles of the Ritz, Clairol and Richardson-Vicks. KEY SKILLS AND QUALIFICATIONS: With her many years of experience in media and marketing, including multiple senior management roles for companies as varied as Richardson-Vicks, Clairol, Showtime Networks, Revlon and Madison Square Garden, Ms. Denison provides Omnicom and its Board with a deep understanding of consumer behavior and a strategic vision of the business operations of Omnicom’s agencies. As former Partner of an executive search firm and an executive within the media, entertainment and consumer products industries, Ms. Denison brings to the Board an intimate familiarity with executive compensation practices, as well as an extensive knowledge of complex media strategies, the oversight of management, and consumer market insights. Ms. Denison’s leadership experience as a Partner at Cook Associates where she was involved in executive recruiting of the most senior executives, generally at the “C Suite” level, provides her with unparalleled knowledge of the compensation policies and practices of large public companies. This knowledge is an extremely valuable contribution to her role as Chair of Omnicom’s Compensation Committee and better enables the Board to perform its function of overseeing management retention and succession. Ms. Denison also brings an international perspective to the Board through her prior service on the Board and Compensation Committee of a company listed on the Tel-Aviv Stock Exchange.

Ronnie S. Hawkins Age 49 Director since
2018
Member of the Finance Committee PROFESSIONAL EXPERIENCE: Mr. Hawkins is a Managing Director, Head of International Investments and member of the Investment Committee of EIG Global Energy Partners. Mr. Hawkins joined EIG in 2014 and was named to the Investment Committee in 2017. In these roles, Mr. Hawkins leads EIG’s efforts to identify, execute and manage energy investments outside the U.S. From 2009 to 2014, Mr. Hawkins was an Executive Vice President of General Electric where he led GE Energy’s Global Business Development activities and served as Chair of the GE Energy Investment Committee. Prior to that, Mr. Hawkins spent 19 years as a senior member of the energy investment banking departments at Citigroup and Credit Suisse, completing corporate advisory assignments in over 50 countries, including mergers, acquisitions, divestitures and restructurings. Mr. Hawkins has also led numerous corporate financings for large companies including equity, debt and structured financings. KEY SKILLS AND QUALIFICATIONS: Mr. Hawkins has extensive strategic planning and corporate advisory experience developed over many years of identifying and managing energy investments for EIG Global Energy Partners. With a focus on investments outside of the U.S., Mr. Hawkins possesses an in-depth understanding of the complex regulations governing international business operations and contributes the highest level of international experience to the Board’s mix of skill sets. Mr. Hawkins also served as a senior executive at General Electric for several years where he managed acquisitions, divestitures and joint ventures while leading GE Energy’s Global Business Development activities. Having structured and overseen a great number of business transactions encompassing varied and complex business strategies, Mr. Hawkins has honed an acute understanding of strategic planning, business operations and the role of management. This background and knowledge serves as a key component of the Board’s effective oversight of Omnicom and its management. Having held several senior positions at Citigroup and Credit Suisse leading corporate financings and advising public companies on large transactions, Mr. Hawkins brings valuable investment banking expertise to the Board. Through his considerable experience advising corporate clients, Mr. Hawkins has developed an expert knowledge of corporate compliance best practices which will be additive to the Board’s oversight of related risks. The experience gained through advising clients on mergers, acquisitions and other strategic corporate transactions provides Mr. Hawkins with a sophisticated ability to evaluate businesses and discern opportunities for growth that will greatly enhance the collective skills of the Board and be particularly valuable to the Finance Committee on which Mr. Hawkins serves.

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ITEM 1 — ELECTION OF DIRECTORS

Deborah J. Kissire Age 60 Director since
2016
Member of the Audit and Finance Committees PROFESSIONAL EXPERIENCE: Ms. Kissire held multiple senior leadership positions at EY during her career from 1979 to 2015, serving most recently as Vice Chair and Regional Managing Partner, member of the Americas Executive Board and member of the Global Practice Group. Other positions held include the U.S. Vice Chair of Sales and Business Development and National Director of Retail and Consumer Products Tax Services. Throughout her career at EY, Ms. Kissire’s leadership skills and vision were leveraged for strategic firm initiatives and programs such as their Partner Advisory Council, Strategy Task Force, Gender Equity Task Force, Vision 2000 Sales Task Force, and global Vision 2020. OTHER PUBLIC COMPANY BOARDS: Ms. Kissire is a director and Chair of the Audit Committee of Cable One, Inc. (listed on NYSE), a company that provides customers with cable television, high-speed Internet and telephone services, and a director, Chair of the Nominating and Corporate Governance Committee and member of the Compensation Committee of Axalta Coating Systems Ltd. (listed on NYSE), a manufacturer of liquid and powder coatings. KEY SKILLS AND QUALIFICATIONS: Ms. Kissire brings several key skills to the Board’s overall mix of knowledge and experience. Throughout a career of 36 years at EY, an internationally recognized accounting firm, Ms. Kissire distinguished herself in a variety of roles. She gained extensive experience serving in senior positions at EY and developed a sophisticated ability to gauge risk in financial, accounting and tax matters. Under Ms. Kissire’s leadership, the size of EY’s Mid-Atlantic practice more than doubled. Through her experience and leadership capabilities, Ms. Kissire has proven herself to possess not only an in-depth understanding of the global financial and taxation regulations facing a business such as Omnicom, but also a keen understanding of how to effectively grow a complex business. Among her leadership roles at EY, Ms. Kissire served as an executive advisor for the firm’s offering in Cyber Economic Security, giving her a unique perspective on digital vulnerabilities and methods of preventing and mitigating cyber-attacks. Taken together, these skills comprise an important component of the Board’s aggregation of skill-sets and make Ms. Kissire an extremely effective member of the Board and Audit Committee. Further, Ms. Kissire also serves on two public company boards and as Chair of the audit committee of one of those.

Gracia C. Martore Age 66 Director since
2017
Member of the Audit and Governance Committees PROFESSIONAL EXPERIENCE: Ms. Martore is the former President and Chief Executive Officer of TEGNA Inc., one of the nation’s largest local media companies formerly known as Gannett Co., Inc., a position she held from October 2011 to June 2017. Ms. Martore held various leadership roles over her 32-year career at TEGNA, including as President and Chief Operating Officer from 2010 to 2011, Executive Vice President and Chief Financial Officer from 2005 to 2010 and Senior Vice President and Chief Financial Officer from 2003 to 2005. Prior to TEGNA, Ms. Martore worked for 12 years in the banking industry. Ms. Martore is also a member of the Board of Directors of FM Global and The Associated Press, and a member of Wellesley College’s Board of Trustees. OTHER PUBLIC COMPANY BOARDS: Ms. Martore is a director, Chair of the Audit Committee and member of the Compensation and Executive Committees of WestRock Company (listed on NYSE), a multinational provider of paper and packaging solutions for the consumer and corrugated packaging markets, and a director and member of the Compensation and Nominating and Corporate Governance Committees of United Rentals, Inc. (listed on NYSE), the world’s largest equipment rental company. In addition, Ms. Martore served as a director of TEGNA Inc. during the last five years. KEY SKILLS AND QUALIFICATIONS: Having served as President and Chief Executive Officer of TEGNA Inc., formerly Gannett Co., Ms. Martore brings strong leadership skills, broad strategic vision, financial expertise and proven business acumen to the Board. Under her leadership, Gannett doubled its broadcast portfolio and acquired full ownership of Cars.com. Ms. Martore’s experience running TEGNA, one of the nation’s largest local media companies, adds to the Board the highest level of industry experience and a keen understanding of the media buying perspective which is a crucial component of Omnicom’s businesses. Ms. Martore also led the separation of Gannett into two separate publicly traded companies. The strategic vision evidenced by Ms. Martore’s successes in transforming Gannett and generating value for shareholders is a critical skill for the Board’s overall mix of skill sets. Prior to serving as President and Chief Executive Officer, Ms. Martore served in a variety of leadership roles at Gannet, including Treasurer, Executive Vice President, Chief Operating Officer and Chief Financial Officer. Ms. Martore’s experience in these varied roles provides her with invaluable financial, accounting, and risk management expertise and enables her to provide the Board with strategic insight into business development and operational matters. Coupled with 12 years of experience in the banking industry, Ms. Martore’s business and financial experience provide valuable expertise to the Board that will be directly utilized through her service as a member of the Audit Committee. Ms. Martore also brings to the Board her experience serving on the board, audit committee, compensation committee and nominating and corporate governance committee of other public companies.

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Linda Johnson Rice Age 60 Director since
2000
Member of the Governance and Compensation Committees PROFESSIONAL EXPERIENCE: Ms. Johnson Rice is Chairman and Chief Executive Officer of Johnson Publishing Company and Fashion Fair Cosmetics, a global prestige cosmetics brand for women of color. In 2016, Ms. Johnson Rice also became Chairman Emeritus of Ebony Media Holdings, the parent company for Ebony and Jet brands and, in 2017, she was named Chief Executive Officer of Ebony Media Operations. Ms. Johnson Rice joined Johnson Publishing Company in 1980, became Vice President in 1985, was elected President and Chief Operating Officer in 1987, and became Chairman and Chief Executive Officer in 2008. OTHER PUBLIC COMPANY BOARDS: Ms. Johnson Rice is a director of Tesla, Inc. (listed on Nasdaq), a company that manufactures and sells electric vehicles and solar energy generation and storage products, and a director and member of the Nominating and Corporate Governance Committee of Grubhub Inc. (listed on NYSE), a leading online and mobile food-ordering and delivery platform. Ms. Johnson Rice also served as a director of Kimberly-Clark Corporation during the last five years. KEY SKILLS AND QUALIFICATIONS: Ms. Johnson Rice’s acute understanding of advertising and brand management and substantial knowledge of consumer businesses developed during her tenure as a Vice President and later as President and Chief Operating Officer and Chief Executive Officer of Johnson Publishing Company brings to the Board valuable insight into Omnicom’s businesses and the concerns of its clients, a matter of paramount importance to Omnicom’s global business strategy. In addition, Ms. Johnson Rice provides Omnicom with a unique perspective into expanding the operations and building the businesses of a global corporate enterprise, in part developed through her leadership role as Chairman of Johnson Publishing Company. The knowledge base Ms. Johnson Rice has developed through her experience in this role is a valuable part of the Board’s overall mix of business expertise, particularly in light of the importance of growth to Omnicom’s commitment to increasing shareholder value. Ms. Johnson Rice also has very broad experience through having served for more than 25 years on the boards, audit committees, compensation committees and nominating and governance committees of several other large public companies in a variety of industries.

Valerie M. Williams Age 61 Director since
2016
Member of the Audit and Finance Committees PROFESSIONAL EXPERIENCE: Ms. Williams is a former Southwest Assurance Managing partner for EY, a position she had held since 2006. She joined EY in 1981 and has over 35 years of audit and public accounting experience, serving numerous global and multi-location companies in various industries. Ms. Williams has held several senior leadership positions at EY and has served on several strategic committees, including the firm’s Partner Advisory Council, Inclusiveness Council, Audit Innovation Taskforce and the Diversity Taskforce. OTHER PUBLIC COMPANY BOARDS: Ms. Williams is a director and member of the Audit Committee of WPX Energy, Inc. (listed on NYSE), an independent oil and natural gas exploration and production company engaged in the exploitation and development of long-life unconventional properties. KEY SKILLS AND QUALIFICATIONS: Ms. Williams has tremendous audit practice experience gained over the course of her career and through this experience has developed risk management skills that are a key component of the Board’s oversight role. The significant financial reporting expertise developed by Ms. Williams through 35 years of audit and public accounting experience serving numerous global and multi-location companies in various industries is a valuable contribution to the Board’s overall mix of skill-sets and is particularly critical to Ms. Williams’s service as a member of the Audit Committee. Ms. Williams distinguished herself in various senior roles throughout her career at EY, and successfully grew a large audit practice group through expert oversight of operations and strategy development. These achievements underscore the business expertise and leadership skills that Ms. Williams possesses and that will better enable the Board to effectively oversee the growth of Omnicom’s businesses. Ours is a global business, and through her experience representing international businesses, Ms. Williams will contribute significantly to guiding Omnicom’s strategic expansion overseas. Ms. Williams also served on several important committees at EY, including the Inclusiveness Council and the Diversity Taskforce, and brings to the Board additional knowledge of the strategies regarding inclusion and diversity. Further, Ms. Williams has experience serving on another public company board and audit committee.

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DIRECTOR INDEPENDENCE

Our outside directors, including those not nominated for re-election, are Alan R. Batkin, Mary C. Choksi, Robert Charles Clark, Leonard S. Coleman, Jr., Susan S. Denison, Ronnie S. Hawkins, Deborah J. Kissire, Gracia C. Martore, John R. Murphy, John R. Purcell, Linda Johnson Rice and Valerie M. Williams. Our Board has determined that all of our outside directors are “independent” within the meaning of the rules of the New York Stock Exchange (“NYSE”), as well as under our Corporate Governance Guidelines. Our Corporate Governance Guidelines are posted on our website at http://www.omnicomgroup.com. In determining that each of our outside directors is independent, the Board took into consideration the answers to annual questionnaires completed by each of the directors, which covered any transactions with director-affiliated entities. The Board also considered that Omnicom and its subsidiaries occasionally and in the ordinary course of business, sell products and services to, and/or purchase products and services from, entities (including charitable foundations) with which certain directors are affiliated. The Board determined that these transactions were not material to Omnicom or the entity and that none of our directors had a material interest in the transactions with these entities. The Board therefore determined that none of these relationships impaired the independence of any outside director. John D. Wren, our President and Chief Executive Officer, and Bruce Crawford, our Chairman of the Board, are not independent due to their positions as executive officers.

SHAREHOLDER NOMINATION PROCESS

Nominations for directors at our 2019 Annual Meeting of Shareholders may be made only by the Board, or by a shareholder entitled to do so pursuant to our By-laws not later than the deadlines set forth below in the section entitled “Shareholder Proposals and Director Nominations for the 2019 Annual Meeting.”

Our By-laws provide that shareholders may present director nominations directly at the annual meeting (and not for inclusion in our proxy statement) by satisfying certain advance notice requirements, and providing information as to such nominee and submitting shareholder as specified in our By-laws. Our By-laws also permit a shareholder or group of up to 20 shareholders owning 3% or more of the Company’s common stock continuously for at least three years to nominate and include in the Company’s proxy statement director candidates constituting up to 20% of the Board, but no less than two, to be considered for election by the holders of the Company’s common stock, provided that the shareholder (or group) and each nominee satisfy the requirements and provide information as to such nominee and submitting shareholder as specified in our By-laws.

You can obtain a copy of the full text of the By-law provisions noted above by writing to our Corporate Secretary at our address listed below in the section entitled “Availability of Certain Documents”, or on our website at http://www.omnicomgroup.com. Our By-laws have also been filed with the U.S. Securities and Exchange Commission ("SEC").

The Governance Committee will consider all candidates recommended by our shareholders in accordance with the procedures included in our By-laws and this Proxy Statement. We did not receive any nominee recommendations from shareholders this year. Any future director candidate recommendations made by shareholders that are properly submitted will be considered by the Governance Committee in the same manner as those submitted by the Board or the Governance Committee itself.

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MAJORITY VOTING STANDARD FOR ELECTION OF DIRECTORS

In accordance with our By-laws, directors are elected by a majority of the votes cast. That means the nominees will be elected if the number of votes cast “for” a director’s election exceeds the number of votes cast “against” such nominee. For this purpose, broker non-votes will not count as a vote cast and will have no effect on the elections of directors. Our form of proxy permits you to abstain from voting “for” or “against” a particular nominee. However, shares represented by proxies so designated will count as being present for purposes of determining a quorum but will not count as a vote cast and will have no effect on the election of directors. Such proxies may also be voted on other matters, if any, that may be properly presented at the meeting.

If an incumbent nominee is not reelected, New York law provides that the director would continue to serve on the Board as a “holdover director.” Under our By-laws and a policy adopted by the Board, such a director is required to promptly tender his or her resignation to the Board. The Governance Committee of the Board then must consider whether to accept the director’s resignation and make a recommendation to the Board. The Board will then consider the resignation, and within 90 days after the date of certification of the election results, publicly disclose its decision and the reasons for its decision.

A director whose resignation is under consideration may not participate in any deliberation regarding his or her resignation unless none of the directors received a majority of the votes cast. If the Board accepts a director’s resignation, the Board will then elect a replacement in accordance with the By-laws.

Board’s Role and Responsibilities

STRATEGIC OVERSIGHT

The Board oversees Omnicom’s strategy setting and review process, which is led by the Company’s management team and is focused on execution of a long-term strategy to deliver value to our shareholders. The Board reviews and assesses the strategic priorities developed and implemented by management under the direction of Omnicom’s CEO, John Wren. The Board reviews Omnicom’s financial performance throughout the year and evaluates strategy in light of results, with an industry focus that includes peer comparisons and our competitive ability to attract and retain the most talented workforce. At least annually, the Board has a more detailed discussion, generally over two days, which is informed by reports from management on a variety of strategic matters and input regarding strategic goals of Omnicom’s networks and practice areas. At this meeting, the Board receives a complete analysis of the strategies with respect to the multiple business components integral to Omnicom’s comprehensive long-term strategic direction. Our Board believes this comprehensive process greatly strengthens its ability to effectively oversee management as Mr. Wren and senior leadership drive the future success of our Company.

RISK OVERSIGHT

Our Board oversees an enterprise-wide approach to risk management, designed to support the achievement of organizational objectives, including strategic objectives, to improve long-term organizational performance and enhance shareholder value. The principal oversight function of the Board and its committees includes understanding the material risks the Company confronts and methods to mitigate or manage those risks. Management is responsible for identifying and assessing the related risks and establishing appropriate risk management practices. Our Board reviews management’s assessment of the related risk, and discusses with management the appropriate level of risk for the Company.

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	OUR BOARD OF DIRECTORS Administers its risk oversight function with respect to our operating risk as a whole, and the Board and its committees meet with management at least quarterly to receive updates with respect to our business operations and strategies, financial results and the monitoring of related risks. The Board also delegates oversight to the Audit, Governance, Compensation and Finance Committees to oversee selected elements of risk:
	OUR AUDIT COMMITTEE Oversees financial risk exposures, including monitoring the integrity of the financial statements, internal control over financial reporting, and the independence of the independent auditors of the Company. The Audit Committee inquires of management and the independent auditors about significant risks or exposures and assesses management’s actions in light of any such risks, and also discusses guidelines and policies governing the process by which management of the Company assesses and manages the Company’s exposure to risk. The Audit Committee receives an assessment report from the Company’s internal auditors on at least an annual basis and more frequently as appropriate. The Audit Committee also assists the Board in fulfilling its oversight responsibility with respect to compliance with legal and regulatory matters related to the Company’s financial statements and meets quarterly with our financial management, independent auditors and legal advisors for updates on risks related to our financial reporting function.
	OUR GOVERNANCE COMMITTEE Oversees governance-related risk by working with management to establish Corporate Governance Guidelines and policies applicable to the Company and our management, including recommendations regarding director nominees, the determination of director independence, Board leadership structure and membership on Board committees. The Company’s Governance Committee also oversees risk by working with management to adopt codes of conduct and business ethics designed to encourage the highest standards of business ethics.
	OUR COMPENSATION COMMITTEE Oversees compensation-related risk by working with management in the creation of compensation structures that create incentives to encourage a level of risk-taking behavior consistent with the Company’s business strategy.
	OUR FINANCE COMMITTEE Oversees financial, credit and liquidity risk by overseeing our Treasury function to evaluate elements of financial and credit risk and advise on our financial strategy, capital structure, capital allocation and long-term liquidity needs, and the implementation of risk mitigating strategies.
	THE COMPANY’S MANAGEMENT Responsible for day-to-day risk management. The CEO, CFO and General Counsel periodically report on the Company’s risk management policies and practices to relevant Board committees and to the full Board. Our Treasury, Legal, Controller and Internal Audit functions work with management at the agency level, serving as the primary monitoring and testing function for company-wide policies and procedures, and managing the day-to-day oversight of risk management strategy for the ongoing business of the Company. We believe the division of risk management responsibilities described above is an effective approach for addressing the risks facing the Company and that our Board leadership structure supports our approach.

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Diversity and Corporate Responsibility

ESG INITIATIVES

At Omnicom, we’re committed to promoting sustainable practices and making positive contributions to society around the globe.

■ Omnicom is a signatory to the United Nation’s Global Compact (UNGC).

■ Omnicom and five other leading global advertising networks joined forces to promote the UN Sustainable Development Goals (SDGs) through the Common Ground initiative. As part of our commitment to Common Ground, Omnicom is working towards Sustainable Development Goal 4 (SDG 4), to ensure inclusive and quality education for all and promote lifelong learning.

■ Omnicom is committed to reducing our environmental footprint, primarily by consolidating office space and installing more energy-efficient heating and cooling systems.

Our most recent Corporate Responsibility Report includes the following highlights:

■ As a signatory to the UNGC, we have pledged to support ten universal principles, including protecting human rights, promoting fair labor practices, protecting the environment and rooting out corruption.

■ In support of SDG 4, we are donating our time and expertise to promote Girl Effect and Theirworld, two non-profits that create educational opportunities for girls and children.

■ In 2017, we reduced our overall carbon emissions by 11% through a reduction in air travel, automobile usage, and the use of fuel oil and natural gas.

Learn more at http://csr.omnicomgroup.com

INCLUSION AND DIVERSITY

Omnicom believes that workplace diversity creates value for the Company, enhances the quality of work we create for clients and fosters a positive corporate culture. We know that a workforce reflecting the demographics of our society is better poised to create effective campaigns for our clients that resonate with a diverse population. With our global presence, we believe it is important that our workforce reflects our global community. This commitment to diversity starts within the boardroom. Our Board includes six women and four African Americans, including Leonard S. Coleman, Jr., our Lead Independent Director. Across the Company, we are committed to recruiting and retaining the best talent from diverse backgrounds, experiences and perspectives and have implemented key programs and initiatives to ensure we deliver on this commitment. These efforts include:

■ Internal focus and accountability – Omnicom created the role of Senior Vice President and Chief Diversity Officer at our corporate office in 2009, reporting directly to the CEO, and this role has since been expanded throughout our Company. Our individual networks now employ their own Directors of Diversity or Chief Diversity Officers, and throughout Omnicom and its networks, 10 professionals are dedicated full-time to overseeing and advancing diversity and inclusion efforts at every level of our organization.

■ Omnicom People Engagement Network (OPEN) – led by six senior-level Chief Diversity Champions, meets quarterly to share best practices and develop tools to efficiently and effectively incorporate diversity and inclusion initiatives at Omnicom offices.

■ OPEN Pride – a sub-group of OPEN, specifically strives to identify and develop LGBTQ talent and promote awareness, acceptance and advocacy by creating opportunities for leadership, visibility, community involvement, networking and business throughout our networks.

■ ADCOLOR – Omnicom supports this network of outstanding diverse professionals and champions of diversity and inclusion. At the annual ADCOLOR Conference and Awards, diverse professionals at all levels within the industry are honored for their personal contributions and efforts to open doors for other high-potential, diverse professionals.

■ Omniwomen – is a global initiative, launched in April 2014, intended to serve as a catalyst to increase the influence and number of women leaders across the Omnicom networks. Leading this initiative are the most senior women executives across Omnicom and its agencies.

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■ Supplier diversity – In connection with the Omnicom Supplier Diversity Initiative, we created the Omnicom Supplier Diversity Database in order to expand access to diverse suppliers across our global network of agencies. The database is a resource that spurs collaboration with clients and suppliers and currently includes more than 1,300 minority- and women-owned vendors. By successfully utilizing these mutually beneficial business relationships, we help meet the diversity goals that we have set for Omnicom as well as those of our clients.

We have been publicly recognized for our commitment to inclusion and diversity initiatives. Most recently, in 2016 and 2017 Omnicom was designated as one of the “Best Places to Work for LGBT Equality” by the Human Rights Campaign Foundation and received a score of 100 percent on the foundation’s Corporate Equality Index survey. Our Senior Vice President and Chief Diversity Officer was recognized as the 2015 Global Diversity Champion by the European Diversity Awards. Our Chief Executive Officer, John Wren, was honored as a pioneer and supporter of diversity by the American Advertising Federation at their 2013 Diversity Achievement and Mosaic Awards, and Omnicom Group was recognized as a Diversity Pioneer at the 2012 Diversity Achievement and Mosaic Awards.

Omnicom shares the following key diversity statistics on its website:

■ 21% of U.S. “Officials and Managers” are multicultural, an increase of 31% from five years ago with improvement among each of the Equal Employment Opportunity Commission’s Hispanic/Latino, Black/African American and Asian designations.

■ The U.S. “Professional” talent base is 28% multicultural, an increase of 23% from five years ago with improvement among each of the Equal Employment Opportunity Commission’s Hispanic/Latino, Black/African American and Asian designations.

■ Women make up 54% of U.S. “Officials and Managers.”

■ Of the approximately 24,000 U.S. employees who are “Professionals” and “Officials and Managers,” 26% are multicultural, 55% are women, and only 34% are white men.

■ Of the 14 current members of Omnicom’s Board of Directors, six are women and four are African American.

We believe that these statistics clearly reflect the value Omnicom places on workplace diversity and the strength of its efforts to promote professional opportunities for women and minorities.

Communications with Shareholders

SHAREHOLDER ENGAGEMENT

We are strongly committed to shareholder outreach, supported and overseen by the Board, and believe regular, transparent communication with our shareholders is important to our long-term success. Mr. Coleman, our Lead Independent Director, actively participates in selected investor meetings each year. To ensure that we fully address any shareholder concerns, shareholder feedback is shared with the Governance and Compensation Committees, as appropriate, as well as with the full Board.

During the last year, we reached out to shareholders representing more than 70% of our outstanding shares and engaged with shareholders representing approximately 40% of our outstanding shares in a continued effort to foster a successful shareholder outreach program, establishing and deepening the relationships with the governance teams at many of our largest investors. Mr. Coleman participated in conversations with over 20% of our outstanding shares and shared aggregate feedback with the full Board.

Based on the feedback we received from shareholders, the Board has taken significant steps to be responsive to their concerns, including adoption of a board retirement policy described in the section entitled “Director Retirement Policy” on page 30 that at the 2018 Annual Meeting will have resulted in six of our Board members stepping down between May of 2016 and May of 2018. For a more complete summary of the feedback we heard from shareholders and actions taken by the Board, please refer to page 7 of our Proxy Summary. We value our investors’ views regarding our Company, as well as their opinions on corporate governance best practices. Our Board and management found this engagement constructive and informative and will continue our engagement efforts.

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ITEM 1 — ELECTION OF DIRECTORS

SHAREHOLDER COMMUNICATIONS WITH BOARD MEMBERS

Interested parties, including shareholders, may communicate (if they wish on a confidential, anonymous basis) with the outside directors, the Chairs of our Audit, Compensation, Finance and Governance Committees or any individual director (including our Lead Independent Director who presides over the executive sessions of our independent non-management directors) on board-related issues by writing to such director, the Committee Chair or to the outside directors as a group c/o Corporate Secretary at Omnicom Group Inc., 437 Madison Avenue, New York, New York 10022. The envelope should clearly indicate the person or persons to whom the Corporate Secretary should forward the communication. Communications will be distributed to the Board, or to any individual director or directors as appropriate, depending on the facts and circumstances outlined in the communications.

Board Leadership Structure

CHAIRMAN AND CEO ROLES

Our Governance Committee, as well as the full Board when appropriate, regularly evaluates the leadership structure of our Board to determine what arrangement is most appropriate for the Company and shareholders. The Board believes that it is important to maintain flexibility to determine the appropriate leadership structure based on Company circumstances at the time, and that our directors are best positioned to lead this evaluation given their unique insight into Omnicom’s business, leadership team, culture, opportunities and challenges.

In anticipation of Mr. Crawford’s retirement as Executive Chair, the Board spent considerable time evaluating its leadership structure and assessing various succession options. Ultimately, the Board believed it was critical to the future success of our Company for our CEO Mr. Wren to serve as Chair upon Mr. Crawford’s retirement. In making this decision, the Board evaluated a range of factors, including the complexity of our business; our ongoing organizational realignment; our robust Lead Independent Director role; and feedback from our shareholders regarding Omnicom’s leadership structure:

■ Business Complexity: The Board considered the complex nature of our Company and our business, and that our success is based on retaining the most talented individuals to best serve our clients. Ensuring executive-level continuity in the CEO and Chair roles is integral to supporting the transition of hundreds of client relationships, which have been built on trust and support over many years.

■ Ongoing Organizational Realignment: The Board also took into consideration our Company’s organizational realignment, which Mr. Wren designed and is in the process of implementing to successfully guide Omnicom through a time of rapid change and disruption within our industry. Market-wide acceleration of technological advances and a shifting competitive landscape that affect Omnicom’s businesses underscore the importance of the changes to Omnicom’s networks and practice areas and the reconstituted reporting structure that Mr. Wren has spearheaded. Mr. Wren’s focus is on leveraging the Company’s existing network and client service matrix organizational structures to build a best in class leadership team and position Omnicom for sustainable long-term growth in an increasingly complex global landscape. As we undergo this next phase of strategic realignment, Mr. Wren’s guidance and leadership will continue to be critical. Further, the Board believes that the combined role, balanced by a strong Lead Independent Director position, will facilitate close coordination between management and the Board and help accelerate the ongoing progress of Omnicom’s realignment initiatives.

■ Robust Lead Independent Director Role: Our Lead Independent Director role at Omnicom includes significant responsibilities, similar to those typically overseen by an Independent Chair (see page 26 for a full list of these responsibilities). In addition, the Board anticipates that Leonard S. Coleman, who has served as our Lead Independent Director since late 2015, will continue in this role to provide continuity and stability while we experience change at the Board and management levels. Mr. Coleman has been an active participant in our dialogue with shareholders and has engaged directly on this topic, as well as others discussed above on page 7 of our Proxy Summary in more detail.

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ITEM 1 — ELECTION OF DIRECTORS

■ Shareholder Feedback: The Board carefully considered shareholder perspectives on Omnicom’s leadership structure through extensive engagement conducted over the last seven months. Omnicom reached out to shareholders representing more than 70% of our outstanding shares and engaged with the holders of approximately 40% of shares. During discussions with our investors, we explained the complexity of our business and our ongoing organizational realignment as reasons why it is critical to our business that Mr. Wren serve as Chair. The vast majority of investors who accepted our offer to engage were supportive of combining our Chair and CEO positions at this time – particularly in light of our strong Lead Independent Director role.

While the Board is confident that this leadership structure is best suited to the current needs of the business, the Board remains committed to rigorously evaluating Omnicom’s leadership structure on a periodic basis each year and to gathering shareholder feedback on this matter through ongoing engagement.

LEAD INDEPENDENT DIRECTOR

Our Board is committed to improving the Company’s corporate governance practices, and we have significantly enhanced the responsibilities of our Lead Independent Director’s role to strengthen the Board’s independent oversight of management. This individual would typically also serve as a member of the Governance Committee and, as such, participate in director and CEO succession planning process. In addition to the responsibilities of all directors, our Lead Independent Director’s other duties, which the Board continues to evaluate through engagement with shareholders, include:

■ Preside at executive sessions of the independent directors;

■ Preside at all meetings of the Board at which the Board Chairman is not present;

■ Serve as principal liaison between the independent directors and the Board Chairman and CEO;

■ Oversee the annual Board and committee evaluations;

■ Participate in developing agendas for Board meetings, with the authority to add agenda items;

■ Approve the schedule of Board meetings;

■ Advise the Board Chairman as to the quality, quantity and timeliness of information provided to the Board;

■ Engage and consult with shareholders as part of our shareholder engagement process; and

■ Perform such other duties as the Board may from time to time delegate.

We believe that this leadership structure enhances the accountability of the CEO to the Board and strengthens the Board’s independence from management.

On the recommendation of the Governance Committee, the independent members of our Board designate the Lead Independent Director annually. In May 2017, the independent members of our Board re-elected Leonard S. Coleman, Jr. to serve as the Company’s Lead Independent Director. During his tenure as a member of the Board, Mr. Coleman has consistently demonstrated thoughtful leadership and intelligent decision making. Each year in which he has served as Lead Independent Director, Mr. Coleman has committed to being personally involved in our shareholder engagement efforts. Mr. Coleman’s proven integrity and values align perfectly with the important role of Lead Independent Director. Coupled with his extensive senior management, financial, government, development and public company board experience, the independent members of the Board determined that Mr. Coleman continues to be the ideal candidate to serve as the Company’s Lead Independent Director.

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ITEM 1 — ELECTION OF DIRECTORS

BOARD OPERATIONS AND COMMITTEE STRUCTURE

Our Board met six times during 2017. The Board generally conducts specific oversight tasks through committees so that the Board as a whole can focus on strategic matters and those particular tasks that by law or custom require the attention of the full Board. Our Board has established four standing committees, functioning in these areas, as explained more fully below:

■ audit and financial reporting

■ management/compensation

■ corporate governance

■ finance and acquisitions/divestitures

Each of the committees operates under a written charter recommended by the Governance Committee and approved by the Board. The Board operates pursuant to our Corporate Governance Guidelines. Each Board committee is authorized to retain its own outside advisors. Our Corporate Governance Guidelines and committee charters, which have been approved by the Board, are posted on our website at http://www.omnicomgroup.com. The table below provides current membership for each Board committee.

Director	Audit	Compensation	Governance	Finance
Alan R. Batkin
Mary C. Choksi
Robert Charles Clark
Leonard S. Coleman, Jr.
Bruce Crawford
Susan S. Denison
Ronnie S. Hawkins
Debbie J. Kissire
Gracia C. Martore
John R. Murphy
John R. Purcell
Linda Johnson Rice
Valerie M. Williams
John D. Wren
Number of Meetings in 2017	12	9	7	6

   Member
   Chair

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ITEM 1 — ELECTION OF DIRECTORS

AUDIT COMMITTEE	The Audit Committee’s purpose is to assist the Board in carrying out its financial reporting and oversight responsibilities, including oversight of risk as described in “Risk Oversight” beginning on page 21 above. In this regard, the Audit Committee assists the Board in its oversight of (a) the integrity of our financial statements, (b) compliance with legal and regulatory requirements, (c) the qualifications and independence of our independent auditors, and (d) the performance of our internal audit function and independent auditors. Furthermore, the Audit Committee prepares the report included below in the section entitled “Audit Committee Report.” The Audit Committee also has the power to retain or dismiss our independent auditors and to approve their compensation. The Board has determined that each member of our Audit Committee is “independent” within the meaning of both the rules of the NYSE and Rule 10A-3 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The Board has also determined that each member of our Audit Committee is an “audit committee financial expert,” is “financially literate” and has “accounting or related financial management expertise,” as such qualifications are defined by SEC regulations and the rules of the NYSE, respectively.
Meetings in 2017: 12
COMPENSATION COMMITTEE	The Compensation Committee’s purpose is (a) to assist the Board in carrying out its oversight responsibilities relating to compensation matters, including oversight of risk as described in “Risk Oversight” beginning on page 21 above, (b) to prepare a report on executive compensation for inclusion in our annual Proxy Statement and (c) to administer and approve awards under our equity and other compensation plans. The report of the Compensation Committee is included below in the section entitled “Compensation Committee Report.” The Board has determined that each member of our Compensation Committee is “independent” within the meaning of the rules of the NYSE, a “non-employee director” within the meaning of the regulations of the SEC and an “outside director” within the meaning of regulations of the U.S. Treasury.
Meetings in 2017: 9
GOVERNANCE COMMITTEE	The Governance Committee’s purpose is to assist the Board in carrying out its oversight responsibilities, including oversight of risk as described in “Risk Oversight” beginning on page 21 above, relating to (a) the composition of the Board and (b) certain corporate governance matters. As part of its responsibilities, the Governance Committee considers and makes recommendations to the full Board with respect to the following matters: ■director nominees and underlying criteria for election to the Board and its committees; ■the structure, responsibilities, performance and composition of the Board committees; ■standards and procedures for review of the Board’s performance; ■our Corporate Governance Guidelines generally, including with respect to director qualification standards, responsibilities, access to management and independent advisors, compensation, orientation and continuing education, and performance evaluation; ■management succession; ■shareholder proposals made under SEC rules; ■the Code of Business Conduct applicable to our directors, officers and employees; ■the Code of Ethics applicable to our senior financial officers; and ■the Governance Committee’s performance of its own responsibilities. The Governance Committee also oversees our shareholder engagement efforts and periodically receives reports from management on shareholder feedback. The Board has determined that each member of our Governance Committee is “independent” within the meaning of the rules of the NYSE.
Meetings in 2017: 7
FINANCE COMMITTEE	The Finance Committee’s purpose is to assist the Board in carrying out its oversight responsibilities relating to financial matters affecting Omnicom, including in respect of acquisitions, divestitures and financings and the oversight of risk as described in “Risk Oversight” beginning on page 21 above.
Meetings in 2017: 6

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ITEM 1 — ELECTION OF DIRECTORS

EXECUTIVE SESSIONS

As a matter of policy, the independent, non-management directors regularly meet in executive session, without management present. The independent directors met six times in 2017. Mr. Coleman, our Lead Independent Director, presides over executive sessions of the Board.

DIRECTOR ATTENDANCE AT 100%

Attendance at Board and committee meetings during 2017 was 100% - each of our directors attended 100% of the meetings of the Board and the committees of the Board on which he or she served during 2017. We encourage our directors to attend our annual meetings of shareholders, and all of our directors attended the 2017 Annual Meeting of Shareholders.

Board Policies and Processes

BOARD AND COMMITTEE EVALUATION PROCESS

Every year, the Board and its committees each conduct a self-evaluation to help promote Board and committee effectiveness. The Governance Committee leads the evaluation process, which is overseen by our Lead Independent Director. The process allows directors to evaluate the Board as a whole and the standing committees of the Board on which each director serves through questionnaires covering topics such as:

■ the effectiveness of the Board’s leadership structure and the composition and responsibilities of its committees;

■ the adequacy of the number and length of Board and committee meetings and the appropriateness of topics discussed; and

■ the dynamic between the Board and management, and the quality of management’s presentations and information provided to the Board and its committees.

Our Governance Committee recommends to the full Board a plan for any changes to the functions of our Board or its committees including on structure, responsibilities, performance and composition.

The Governance Committee reviews the composition of the Board and recommends to the full Board nominees for election. The Governance Committee identifies the skills and experience needed to replace any departing director and performs research, either itself or by engaging third parties to do so on its behalf, to identify and evaluate director candidates.

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ITEM 1 — ELECTION OF DIRECTORS

DIRECTOR RETIREMENT POLICY

In December 2015, the Board adopted a mandatory retirement age policy for directors. The policy became effective December 31, 2017 and provides that no director shall be nominated for election or re-election to the Board if the director has reached 75 years of age on or before December 31st of the year preceding election or re-election. The Board, upon the recommendation of the Governance Committee, may waive this limitation for any director if the Board determines that it is in the best interests of the Company and its shareholders to extend the director’s service. The Board has not previously waived the policy, and in the event of a waiver, the Board will provide shareholders with rationale for its decision.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

The following directors served as members of our Compensation Committee during all or a portion of 2017: Susan S. Denison, Alan R. Batkin, Mary C. Choksi, Leonard S. Coleman, Jr., Michael A. Henning and Linda Johnson Rice. None of the Compensation Committee members serving during 2017 is a current or former employee or officer of Omnicom or its subsidiaries. None of the Compensation Committee members serving during 2017 has ever had any relationship requiring disclosure by Omnicom under Item 404 of Regulation S-K. During 2017, none of our executive officers served as a member of the board of directors or compensation committee (or other committee performing equivalent functions) of any other company that had an executive officer serving as a member of our Board or its Compensation Committee.

TRANSACTIONS WITH RELATED PERSONS

We review all relationships and transactions between Omnicom or its subsidiaries and related persons to determine whether such persons have a direct or indirect material interest. Related persons include any director, nominee for director, officer or their immediate family members. Although we do not have a written policy governing such transactions, Omnicom’s legal staff is primarily responsible for the development and implementation of processes and controls to obtain information from the directors and officers with respect to related person transactions and for then determining, based on the facts and circumstances, whether the Company or a related person has a direct or indirect material interest in the transaction. As part of this process, and pursuant to our Audit Committee’s charter, the Audit Committee reviews our policies and procedures with respect to related person transactions. These policies and procedures have been communicated to, and are periodically reviewed with, our directors and executive officers, and the Audit Committee documents in its minutes any actions that it takes with respect to such matters. Under SEC rules, transactions that are determined to be directly or indirectly material to Omnicom, its subsidiaries or a related person are required to be disclosed in Omnicom’s Proxy Statement. In the course of reviewing a related party transaction, Omnicom considers (a) the nature of the related person’s interest in the transaction, (b) the material terms of the transaction, (c) the importance of the transaction to the related person and Omnicom or its subsidiaries, (d) whether the transaction would impair the judgment of a director or officer to act in the best interest of Omnicom, and (e) any other matters deemed appropriate.

Based on the information available to us and provided to us by our directors and officers, we do not believe that there were any such material transactions in effect since January 1, 2017, or any such material transactions proposed to be entered into during 2018, with the following exception. Mr. Wren’s brother, Christopher Wren, is employed as the Financial Systems Director for RAPP, a subsidiary of Omnicom. In 2017, his total compensation was $215,419, including salary, bonus and other benefits.

ETHICAL BUSINESS CONDUCT

We have a Code of Business Conduct designed to assure that our business is carried out in an honest and ethical way. The Code of Business Conduct applies to all of our directors, officers and employees, as well as all of the directors, officers and employees of our majority-owned subsidiaries, and requires that they avoid conflicts of interest, comply with all laws and other legal requirements and otherwise act with integrity. In addition, we have adopted a Code of Ethics for Senior Financial Officers regarding ethical action and integrity relating to financial matters applicable to our senior financial officers. Our Code of Business Conduct and Code of Ethics for Senior Financial Officers are available on our website at

30 2018 Proxy Statement

ITEM 1 — ELECTION OF DIRECTORS

http://www.omnicomgroup.com, and are also available in print to any shareholder that requests them. We will disclose any future amendments to, or waivers from, certain provisions of these ethical policies and standards for senior financial officers, executive officers and directors on our website within the time period required by the SEC and the NYSE.

We also have procedures to receive, retain and treat complaints regarding accounting, financial reporting and disclosure, internal accounting controls or auditing matters and to allow for the confidential and anonymous submission by employees of concerns regarding questionable accounting or auditing matters, as well as possible violations of our Code of Business Conduct or Code of Ethics for Senior Financial Officers. The procedures are posted on our website at http://www.omnicomgroup.com and the websites of our various global networks.

Directors’ Compensation for Fiscal 2017

Directors who are also current or former employees of Omnicom or its subsidiaries receive no compensation for serving as directors. The compensation program for directors who are not current or former employees of Omnicom or its subsidiaries is designed to compensate directors in a manner that reflects the work required for a company of Omnicom’s size and composition and to align directors’ interests with the long-term interests of shareholders. The table below includes the following compensation elements with respect to non-employee directors:

Annual Compensation. For 2017, non-employee directors were paid a cash annual retainer of $90,000 and $2,000 for attendance at each Board or Committee meeting. Non-employee directors are also paid $10,000 for attendance in person at a Board meeting held outside of the U.S. that requires international travel from his or her residence, but no such international meetings were held in 2017 and therefore this additional fee was not paid. In addition, directors receive reimbursement for customary travel expenses.

In accordance with our 2013 Plan, and our Director Compensation and Deferred Stock Program adopted by our Board on December 4, 2008 (as amended), non-employee directors also receive fully-vested common stock each fiscal quarter. For each of the four quarters in 2017, such directors received common stock with a fair value of $36,250 based on the per share closing price of our common stock on the date prior to grant.

Our Director Compensation and Deferred Stock Program and 2013 Plan provide that each director may elect to receive all or a portion of his or her cash director compensation for the following year’s service in common stock. Mr. Murphy and Ms. Martore, as well as Michael A. Henning who retired from the Board on May 25, 2017, each elected to receive all or a portion of their respective 2017 cash director compensation in common stock.

Directors may also elect to defer any common shares payable to them, which will be credited to a bookkeeping account in the directors’ names. These elections must be made prior to the start of the calendar year for which the fees would be payable. The number of shares of common stock delivered or credited to a director’s account is based on the fair market value of our common stock on the first trading day immediately preceding the date the fees would have been paid to the director. Each director other than Mr. Coleman and Ms. Johnson Rice elected to defer all of the common shares payable to them in 2017.

Lead Independent Director and Committee Chair Fees. The Chairs of our committees and our Lead Independent Director receive the following additional annual fees in cash due to the workload and the additional responsibilities of their positions. Our Lead Independent Director received an additional fee of $35,000 for 2017. The Chairs of our Audit, Compensation, Governance and Finance Committees receive an additional fee of $20,000 each year, as long as such Chair is not also an executive officer of Omnicom. In 2017, the former Chair of the Finance Committee, who is an executive officer of Omnicom, did not receive the $20,000 fee.

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ITEM 1 — ELECTION OF DIRECTORS

Name of Director(1)	Fees Earned or Paid in Cash ($)(2)		Stock Awards ($)(3)		Total ($)
Alan R. Batkin	$	132,000	$	145,000	$	277,000
Mary C. Choksi	$	144,000	$	145,000	$	289,000
Robert Charles Clark	$	140,000	$	145,000	$	285,000
Leonard S. Coleman, Jr.	$	189,000	$	145,000	$	334,000
Susan S. Denison	$	154,000	$	145,000	$	299,000
Michael A. Henning(4)	$	73,000	$	72,500	$	145,500
Deborah J. Kissire	$	132,000	$	145,000	$	277,000
Gracia C. Martore(5)	$	56,097	$	67,823	$	123,920
John R. Murphy	$	158,000	$	145,000	$	303,000
John R. Purcell	$	148,000	$	145,000	$	293,000
Linda Johnson Rice	$	130,000	$	145,000	$	275,000
Valerie M. Williams	$	126,000	$	145,000	$	271,000

(1)	Bruce Crawford is an executive officer of Omnicom and does not receive director compensation. In fiscal year 2017, Mr. Crawford received a base salary of $400,000 and a personal use of aircraft hours perquisite with an aggregate incremental cost to Omnicom of $87,337.
(2)	This column reports the amount of cash compensation earned in 2017 for Board and Committee service. The amounts shown include the following amounts, which Messrs. Henning and Murphy and Ms. Martore elected to receive in common stock: Mr. Henning: $45,000; Mr. Murphy: $45,000; and Ms. Martore: $42,097.
(3)	The amount reported in the “Stock Awards” column for each director reflects the aggregate grant date fair value of the stock granted in 2017, computed in accordance with FASB ASC Topic 718. For a discussion of the assumptions used to calculate the fair value of stock awards, refer to notes 2 and 9 to the consolidated financial statements contained in our 2017 10-K. The fair market value for each quarterly stock award was $36,250 for each individual reported in the table above. All stock awards held by directors were fully vested as of December 31, 2017.
(4)	Retired from the Board on May 25, 2017 and amounts shown represent such director’s partial year of service on the Board.
(5)	Began serving on the Board during 2017 and amounts shown represent such director’s partial year of service on the Board.

No Other Compensation. Directors received no compensation in 2017 other than that described above. We do not have a retirement plan for directors and they receive no pension benefits.

Stock Ownership Requirement. The Board encourages stock ownership by directors and, in 2004, we adopted stock ownership guidelines for our directors. The director guidelines provide, in general, that our directors must own Omnicom stock equal to or greater than five times their annual cash retainer within five years of their joining the Board. As of December 31, 2017, each member of our Board that has served on the Board more than five years was in compliance.

32 2018 Proxy Statement

ITEM 2 — ADVISORY RESOLUTION TO APPROVE
EXECUTIVE COMPENSATION

In accordance with the Dodd-Frank Wall Street Reform and Consumer Protection Act and Section 14A of the Exchange Act, we are asking shareholders to approve an advisory resolution on the compensation of the Company’s named executive officers as reported in this Proxy Statement. Last year, the Board recommended that this advisory vote to approve named executive officer compensation be conducted annually and shareholders voted in favor of this recommendation by a substantial majority. Accordingly, the Board has determined that it will hold an advisory vote to approve named executive officer compensation annually until the next vote to determine the frequency of such an advisory vote. Subsequent to the advisory vote reflected in this proposal, the next advisory vote to approve named executive officer compensation is expected to occur at the 2019 Annual Meeting of Shareholders.

Our executive compensation programs are designed to support the Company’s long-term success. As described below in the “Compensation Discussion and Analysis” section of this Proxy Statement, the Compensation Committee has structured our executive compensation program to achieve the following key objectives:

■ attract, motivate and retain the talented executives who are a critical component of Omnicom’s long-term success by providing each with a competitive total rewards package;

■ support talent development in a rapidly evolving industry;

■ maintain a balanced approach to building long-term shareholder value that does not overemphasize a single metric; and

■ ensure that executive compensation is aligned with both the short and long-term interests of shareholders.

For each NEO, the majority of his total compensation was variable and based on performance. With respect to our Chief Executive Officer, 96% of his 2017 compensation was variable and based on performance and 43% is also contingent upon the future performance of the Company.

2017 CEO Compensation

2017 CEO Compensation Mix

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ITEM 2 — ADVISORY RESOLUTION TO APPROVE EXECUTIVE COMPENSATION

We urge shareholders to read the “Compensation Discussion and Analysis” below, which describes in more detail how our executive compensation policies and procedures operate and are designed to achieve our compensation objectives, as well as the Summary Compensation Table and related compensation tables and narrative below, which provide detailed information on the compensation of our named executive officers. The Compensation Committee and the Board believe that the policies and procedures articulated in the “Compensation Discussion and Analysis” are effective in achieving our goals and that the compensation of our named executive officers reported in this Proxy Statement has supported and contributed to our success.

We are asking shareholders to approve the following advisory resolution at the 2018 Annual Meeting.

RESOLVED, that the shareholders of Omnicom Group Inc. (the “Company”) approve, on an advisory basis, the compensation of the Company’s named executive officers, as disclosed in the Company’s Proxy Statement for the 2018 Annual Meeting of Shareholders pursuant to the compensation disclosure rules of the Securities and Exchange Commission, including the Compensation Discussion and Analysis, the Summary Compensation Table for 2017 and the other related tables and disclosure.

This advisory resolution, commonly referred to as a “say-on-pay” resolution, is non-binding on the Board. Although non-binding, the Board and the Compensation Committee will carefully review and consider the voting results when evaluating our executive compensation program.

The Board UNANIMOUSLY recommends that shareholders vote FOR the advisory resolution
to approve executive compensation.

Approval of this item requires the favorable vote of the holders of a majority of the shares voting on the item. Abstentions and broker non-votes will have no effect on the outcome of this item.

34 2018 Proxy Statement

EXECUTIVE COMPENSATION

Table of Contents

	Page
Executive Summary	36
Overall Compensation Objectives and Principles	36
About Our Business	36
Overview of 2017 Company Performance	37
Compensation Decisions Reflect Performance	40
2017 CEO Compensation	41
Last Year’s Say on Pay Vote and Shareholder Engagement	42
Compensation Committee Report	42
Compensation Discussion & Analysis	43
Objectives	43
Elements of Omnicom Compensation and Fiscal Year 2017 Decisions	44
Other Executive Compensation Arrangements	54
Executive Compensation Related Practices, Policies and Guidelines	55
Summary Compensation Table for 2017	58
Grants of Plan-Based Awards in 2017	59
Outstanding Equity Awards at 2017 Year-End	59
Option Exercises and Stock Vested in 2017	60
Nonqualified Deferred Compensation in 2017	60
Potential Payments Upon Termination of Employment or Change in Control	61
Pay Ratio Disclosure	64

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EXECUTIVE COMPENSATION

Executive Summary

OVERALL COMPENSATION OBJECTIVES AND PRINCIPLES

The Compensation Committee is responsible for establishing, implementing and monitoring Omnicom’s executive compensation policies and program. The overarching goals of our compensation program are to:

Attract, motivate and retain	Support talent development	Maintain a balanced approach	Ensure that executive compensation is aligned
the talented executives who are a critical component of Omnicom’s long-term success by providing each with a competitive total rewards package;	in a rapidly evolving industry;	to building long-term shareholder value that does not overemphasize a single metric; and	with both the short and long-term interests of shareholders.

We accomplish this by:
■	closely tying pay to current and long-term performance;
■	maintaining a high degree of variable compensation;
■	establishing challenging performance metrics that are targeted to the Company, our industry and our business strategy; and
■	sustaining competitive compensation levels.

ABOUT OUR BUSINESS

Omnicom is a strategic holding company formed in 1986 and through its branded networks and agencies is a leading global provider of advertising, marketing and corporate communications services to over 5,000 clients in more than 100 countries. We operate in a highly competitive industry and compete against other global, national and regional advertising and marketing services companies. The proliferation of media channels, including the rapid development and integration of interactive technologies and mediums, has fragmented consumer audiences targeted by our clients. These developments make it more complex for marketers to reach their target audiences in a cost-effective way, causing them to turn to global service providers such as Omnicom for a customized mix of advertising and marketing services designed to make the best use of their total marketing expenditure.

Our branded networks and agencies operate in all major global markets and provide a comprehensive range of services in the following fundamental disciplines: advertising, customer relationship management, or CRM, public relations and healthcare. In an effort to monitor the changing needs of our clients and to better capture the expanded scope of our services, in the fourth quarter of 2017, we realigned our service disciplines. As a result, our CRM discipline was grouped into two separate categories: CRM Consumer Experience, which includes Omnicom Precision Marketing Group’s digital / direct marketing agencies, as well as our branding agencies, shopper marketing agencies and our experiential marketing agencies; and, CRM Execution & Support, which includes field marketing, sales support, merchandising and point of sale, as well as other specialized marketing and custom communications services. Also, we realigned and renamed our former specialty communications discipline so that it now exclusively includes agencies offering healthcare and marketing and communications services.

Our business model was built and continues to evolve around our clients. While our networks and agencies operate under different names and frame their ideas in different disciplines, we organize our services around our clients. Our fundamental business principle is that our clients’ specific marketing requirements are the central focus of how we structure our service offerings and allocate our resources. This client-centric business model requires that multiple agencies within Omnicom collaborate in formal and informal virtual client networks utilizing our key client matrix organization structure. This

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collaboration allows us to cut across our internal organizational structures to execute our clients’ marketing requirements in a consistent and comprehensive manner. We believe that this organizational philosophy, our ability to execute on it and our key client matrix organization structure differentiates us from our competition. In addition, during 2017, we continued the process of forming practice areas within our global network structure to bring together agencies operating in common disciplines to leverage existing resources and to create, in close coordination with our key client matrix organization, additional custom client solutions.

As clients increase their requirements for marketing effectiveness and efficiency, they have made it a practice to consolidate their business within one service provider in the pursuit of a single engagement covering all consumer touch points. We have structured our business around this trend. We believe that our key client matrix organization structure approach to collaboration and integration of our services and solutions has provided a competitive advantage to our business in the past and we expect this to continue over the medium and long term. Our key client matrix organization structure facilitates superior client management and allows for greater integration of the services required by the world’s largest brands. Our over-arching strategy is to continue to use our virtual client networks to grow our business relationships with our largest clients by serving them across our networks, disciplines and geographies.

The demands of clients, consumers and new technologies are pushing agencies to work faster. Our new organizational structure is designed to deliver more innovation, ideas, and growth in a nimble and flexible fashion so we can adjust quickly as our clients’ needs change.

OVERVIEW OF 2017 COMPANY PERFORMANCE

In 2017, Omnicom continued to be a leader in an eventful and challenging year for the marketing and advertising industry, in which many of the world’s largest marketers and best-known brands continued to undergo major changes driven by advances in technology, new, disruptive competitors and changing consumer behavior. We believe our 2017 year-end results in this environment, and the structural changes that we made in 2017 to plan for our clients’ evolving needs in the future, serve as a testament to the consistency and diversity of our operations, our strong competitive position across advertising and marketing disciplines and geographic markets, and our ability to adapt our services and expand our capabilities to serve changing client needs in areas such as digital, media, data and analytics. We continue (i) to focus on attracting, retaining and developing top industry talent; (ii) to pursue organic growth in servicing and expanding our offering to our existing clients and winning new business; (iii) to seek high growth areas and opportunities through internal investments and acquisitions; and (iv) to drive efficiencies throughout our organization increasing shareholder value. The following highlights some key achievements that reflect our performance in 2017.

Omnicom Financial Results and Shareholder Return.

	$15.3 billion	$1.1 billion
	Revenues	Net Income
$1.7 billion	$2.1 billion	45.6%	24.1%
Free Cash Flow	Operating Profit	ROE	ROIC

Net income for 2017 decreased $60.2 million, or 5.2% to $1,088.4 million from $1,148.6 million in 2016. The year-over-year decrease was primarily due to the impact of the “Tax Cuts and Jobs Act”, or Tax Act, which was enacted into law on December 22, 2017. The Tax Act reduced the U.S. federal statutory income tax rate to 21% from 35% for tax years beginning after December 31, 2017 and made several changes to existing tax law that affect our tax assets and liabilities related to previously reported taxable income. The significant changes required that we record tax expense on the accumulated earnings of our foreign subsidiaries and adjust our previously reported deferred tax positions to reflect the impact of the revised statutory federal rate as of the enactment date. In December 2017, the SEC issued Staff Accounting Bulletin 118, or SAB 118, which provides guidance on accounting for the impact of the Tax Act. SAB 118 provides that provisional amounts should be recognized in our financial statements where accounting for certain effects of the Tax Act are not complete and

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a reasonable estimate of the effects of the Tax Act can be made. Accordingly, at December 31, 2017, we estimated the effect of the Tax Act and recorded a net increase to income tax expense of $106.3 million. Our estimate was based on our understanding of the Tax Act and currently available guidance. We expect to revise this estimate in future periods as further information becomes available. See Note 10 to the consolidated financial statements in our Annual Report on Form 10-K for the year ending December 31, 2017 (the “2017 10-K”) for additional information. Diluted net income per common share decreased 2.7% to $4.65 per share in 2017, compared to $4.78 per share in 2016.

Excluding the additional net income tax expense of $106.3 million recorded in the fourth quarter of 2017 in connection with the Tax Act, net income for 2017 increased $46.1 million, or 4.0% to $1,194.7 million from $1,148.6 million in the same period in 2016. Excluding the impact of the Tax Act of $0.45 per share, diluted net income per common share for 2017 increased $0.32, or 6.7% to $5.10 per share versus $4.78 per share for the same period in 2016. See Annex A for a discussion of the effect of the Tax Act and a reconciliation of these Non-GAAP measures to the most directly comparable GAAP measure. While we are still evaluating the impact of the Tax Act on our 2018 annual effective tax rate, we expect the Tax Act to reduce our effective tax rate between 3.5% and 4.5%, which excludes the impact of tax benefits or deficiencies on share-based compensation. At this point, we cannot predict the 2018 impact on our tax rate from share-based compensation because it is subject to changes in our share price.

We generated just under $1.7 billion of free cash flow during 2017 excluding the positive effect from changes in working capital. See Annex A for the definition of free cash flow, which is a Non-GAAP measure, and a reconciliation of free cash flow to net income. In October, we increased our quarterly dividend 9.1% to $0.60 per share and for the year, we returned approximately $1.1 billion of cash to shareholders through dividends and net share repurchases. Our cumulative net income from fiscal years 2008 to 2017 totaled $10 billion, during which time our cumulative return of cash to shareholders, including both dividends and net share repurchases, totaled $10.5 billion for a cumulative payout ratio of 105%.

As reported in the 2017 10-K, revenue for the twelve months ended December 31, 2017 decreased by 0.9% to $15,273.6 million from $15,416.9 million in the same period of 2016. The components of the change in revenue include an increase in revenue from the positive foreign exchange rate impact of 0.3%, a decrease in acquisition revenue, net of disposition revenue of 4.2%, primarily reflecting the sale of our specialty print media business in April 2017, and an increase in revenue from organic growth of 3.0% when compared to the same period of 2016.

Operating profit increased 2.5% to $2,059.7 million and earnings before interest, taxes and amortization of intangible assets (“EBITA”) increased 2.3% to $2,173.5 million. Our operating margin increased 50 basis points and our EBITA margin increased 40 basis points versus the full year 2016 results, giving us an operating margin and EBITA margin of 13.5% and 14.2%, respectively, for the year. This expansion reflects the success of our efficiency programs discussed below. See Annex A for a discussion of EBITA and EBITA margin, which are Non-GAAP measures, and a reconciliation of net income to EBITA.

We continued to manage and build the Company through a combination of well-focused, internal development initiatives and prudently priced acquisitions. For the last 12 months, our return on invested capital was 24.1%, while our return on equity was 45.6%. Return on invested capital is defined as after tax reported operating profit 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). See Annex A for the definition of after tax reported operating profit and a reconciliation of after tax reported operating profit to reported operating profit.

We Remained Focused on Delivering Efficiencies through Our Operational Initiatives.

We continued to challenge our management team to manage costs, agency by agency. As part of that process, we strive to ensure each member of our management team is implementing strategies to grow their businesses. On a regional and global basis, the Company continued to make progress on leveraging our scale in areas such as real estate, information technology, back office services and procurement to be as efficient and effective as possible.

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We Were Recognized for Our Extraordinary Creativity and Effectiveness on Behalf of Our Clients.

In 2017, the depth and diversity of our talent, our creative excellence and the collaboration of our agencies from around the world allowed us to win a meaningful share of the industry’s recognition and awards. The following are just a few of the highlights:

Omnicom Group was named Creative Holding Company of the Year at the 44^th annual One Show Awards.

Omnicom Media Group was named Media Group of the Year at the Festival of Media North America Awards; PHD was named Agency Network of the Year and Touché! PHD Canada was awarded Agency of the Year.

DDB Worldwide was named Network of the Year for the fifth consecutive year at the Eurobest Awards. In addition, adam&eveDDB was crowned overall Agency of the Year.

At the 64^th annual Cannes Lions International Festival of Creativity, 152 Omnicom agencies won nearly 360 awards from approximately 35 different countries across more than 20 communication disciplines. Among the many honors, BBDO claimed both Network and Agency of the Year and DDB ranked among the top five networks.

Omnicom Media Group marked its first year with three agency networks in competition at the Cannes Lions International Festival of Creativity with all three earning top accolades. OMD Worldwide was named Media Network of the Year.

At the 2017 Spikes Asia Festival of Creativity, Omnicom agencies continued to be the most creatively awarded in the industry, winning more awards than any other holding company.

BBDO Worldwide and adam&eveDDB earned the titles of Advertising Network of the Year and Advertising Agency of the Year, respectively, by Campaign Magazine.

At the Campaign Asia Pacific Agency of the Year Awards, TBWA Worldwide and BBDO Worldwide won creative and digital agency of the year in Hong Kong, Korea, Philippines, New Zealand, Singapore, Thailand and China.

We continued to make selective acquisitions to broaden our capabilities.

We believe our success has been driven by our consistent focus on organic investment as well as our targeted acquisition strategy. Some of our notable 2017 investments and acquisitions are as follows:

TBWA Worldwide acquired leading independent UK creative agency Lucky Generals, well known for their creativity and innovation. TBWA formed a new TBWA UK Group, which consists of Lucky Generals and TBWA\London. Lucky Generals and TBWA\London continue to operate as two separate brands within the new group. The structure exemplifies TBWA’s unique approach to developing a global advertising collective of connected, yet distinct, agencies.

Omnicom Media Group acquired Verve Search. Verve’s team spans 14 nationalities and provides services in 15 languages, with clients including Expedia, Sage, Go Compare and Made. Verve also developed proprietary technologies including the “Link score tool”, which allows links to be evaluated, and Verve was named “SEO agency of the year” at The European Search Awards 2017.

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The Clemenger Group New Zealand acquired research/customer intelligence company Perceptive Group in a move designed to add data-driven marketing capabilities to its offering. Perceptive was founded in 2005 as a full-service market research company and has since evolved into an agency focusing on customer experience, insight-led strategy and data-driven decision making. It has also proven itself as one of New Zealand's fastest growing agencies.

TBWA Worldwide acquired MOBILE STRATEGY, a creative full-service digital agency based in Amsterdam and founded in 2010 that focuses on mobile CRM/loyalty, mobile commerce, and mobile content & campaigns. MOBILE STRATEGY operates within the TBWA\Netherlands Group.

Omnicom maintained our commitment to diversity, talent development and community.

Our commitment to hiring and developing the best talent is unwavering. In February of 2018, Wendy Clark was appointed the new CEO of DDB Worldwide. Ms. Clark joined DDB in 2016 and under her leadership, the agency has grown by expanding existing relationship and winning new business. On January 1, 2018, Barri Rafferty became CEO of Ketchum, making her the first woman CEO to lead a top five global public relations agency.

We believe a diverse and inclusive workforce starts at the top with Omnicom’s independent Board of Directors. We expect that following the Annual Meeting of Shareholders, our Board will have 11 members, which will include six women and four African Americans, including our Lead Independent Director. Omniwomen, a global organization within Omnicom, dedicated to championing the number and influence of female talent within the Company, accelerated its global expansion in 2017 with four new chapter openings in Canada, France, Germany and the United Arab Emirates. OPEN Pride, an employee resource group that fuels the personal growth, organizational inclusion and business success of Omnicom’s lesbian, gay, bisexual and transgender (LGBT) employees and allies plans to launch global chapters in Hong Kong, London, Manila, New York, Mumbai and Shanghai. Omnicom achieved a perfect score of 100 percent for the second consecutive year on the Corporate Equality Index (CEI) survey, a nationally recognized benchmarking tool for corporate inclusive policies, benefits and practices pertinent to LGBT employees, administered by the Human Rights Campaign Foundation. In addition to being highly rated, Omnicom has been designated as one of the “Best Places to Work for LGBT Equality” by the HRC Foundation. Additional information on our diversity efforts is set forth above in the section entitled “Diversity and Inclusion.”

We believe the depth and diversity of our talent is of paramount importance, so we continually strive to provide an excellent work environment with first-rate professional development opportunities. We also place considerable effort on succession planning, advancement and diversity. Since 1995, Omnicom University has focused on leadership programs for our senior managers and our many professional development programs remain committed to investing in our talent - at all levels - in a way that sustains and accelerates our growth.

At last year’s Cannes Lions International Festival of Creativity, we formalized our pledge of support to the United Nations Sustainable Development Goals #4, Education, by creating two new, three-year global partnerships with leading NGOs: Theirworld and Girl Effect. These two outstanding non-profits share a similar mission to ours- education for all.

COMPENSATION DECISIONS REFLECT PERFORMANCE

These and other 2017 achievements were a direct result of the leadership of our named executive officers, or “NEOs”, and other senior executives and provide significant context for the Compensation Committee’s pay-for-performance approach and key 2017 compensation decisions. Our NEOs for fiscal year 2017 were:

■ John D. Wren, President and Chief Executive Officer

■ Philip J. Angelastro, Executive Vice President and Chief Financial Officer

■ Dennis E. Hewitt, Treasurer

■ Jonathan B. Nelson, Chief Executive Officer, Omnicom Digital

■ Michael J. O’Brien, Senior Vice President, General Counsel and Secretary

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Omnicom strives to link closely executive compensation to performance by making a significant portion of potential compensation variable, as well as long-term performance driven. The more senior the executive, the lower his base pay will be as a proportion of his entire compensation package and the higher his incentive-based and long-term retention components will be as a proportion of his entire compensation package. We believe this is aligned with shareholder interest and the long-term interests of the Company. For each NEO, the majority of his total compensation was variable and based on performance. With respect to our CEO, 96% of his 2017 compensation was variable and based on performance and 43% is also contingent upon long-term Company performance.

2017 CEO COMPENSATION

2017 CEO Compensation Mix

The process by which incentive compensation awards were determined for performance in fiscal 2017, and the manner in which they were paid, aligns with our pay-for-performance objectives. A key component of our executive compensation program is a performance-based bonus (an “Incentive Award”) awarded pursuant to Omnicom’s Senior Management Incentive Plan (the “Incentive Award Plan”). The Incentive Award that each named executive officer earned in 2017 was primarily derived from a pre-set formula incorporating a combination of the following quantitative performance metrics:

■ Omnicom’s annual financial performance against annual performance targets established by the Compensation Committee; and

■ Omnicom’s annual financial performance against that of an industry peer group established by the Compensation Committee.

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LAST YEAR’S SAY ON PAY VOTE AND SHAREHOLDER ENGAGEMENT

The Compensation Committee believes that our executive compensation program aligns with performance, reflects our business philosophy and utilizes competitive practices regarding executive compensation in a highly competitive industry. At our 2017 Annual Meeting of Shareholders, over 93% of the votes cast on the say-on-pay proposal at that meeting were voted in favor of our 2017 executive compensation program. The Compensation Committee believes this affirms shareholders’ support of the Company’s approach to executive compensation. Omnicom’s performance in fiscal year 2017 and our many creative, strategic and operational accomplishments reinforce the Compensation Committee’s view that our executive compensation program is achieving its long-term objectives, and the Compensation Committee made no significant changes to the program during the year in response to last year’s say on pay vote. The Compensation Committee will continue to consider the outcome of the Company’s say-on-pay votes and feedback received directly from our shareholders when making future compensation decisions for the named executive officers.

During the last year, we reached out to shareholders representing more than 70% of our outstanding shares. We engaged with every shareholder who accepted our invitation to talk in a continued effort to foster a successful shareholder outreach program. Executive compensation was one of many topics included in our discussion with shareholders and shareholder feedback is shared with the Compensation Committee, as appropriate, as well as with the full Board.

Compensation Committee Report

The Compensation Committee, which is comprised solely of independent members of the Board, has reviewed the “Compensation Discussion and Analysis” and discussed the analysis with management. Based on its review and discussions with management, the Compensation Committee recommended to the Board that the “Compensation Discussion and Analysis” be included in this Proxy Statement and incorporated by reference in Omnicom’s 2017 10-K filed with the SEC on February 15, 2018.

Members of the Compensation Committee
Alan R. Batkin
Mary C. Choksi
Leonard S. Coleman, Jr.
Susan S. Denison
Linda Johnson Rice

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Compensation Discussion & Analysis

OBJECTIVES

Compensation Decision Process

The Compensation Committee annually reviews and approves the compensation of the named executive officers. To aid the Compensation Committee in making its compensation determinations, the Chief Executive Officer annually reviews the performance of each other named executive officer by evaluating the performance factors described in this Compensation Discussion and Analysis and presents his conclusions and recommendations to the Compensation Committee. The Compensation Committee considers the Chief Executive Officer’s recommendations, but ultimately exercises its own discretion. With respect to 2017 compensation, the Compensation Committee did not deviate materially from our Chief Executive Officer’s recommendations. Additional detail regarding the process used to set executive compensation targets, evaluate performance, and determine payouts is provided in the below diagram.

Process for Determination of our Executive Compensation: Step-By-Step

STEP		Base Salary Compensation Committee sets base salaries – Mr. Wren’s salary last increased 15 years ago
1
STEP		Setting Performance Measures Compensation Committee sets quantitative performance measures for meriting an Incentive Award
2

STEP		Determining Multipliers Based on Performance Range Compensation Committee ascribes a range of predetermined multipliers based on the range of Omnicom performance with respect to each performance measure
3

STEP		Setting Target and Maximum Incentive Award Dollar Amounts Compensation Committee sets maximum and target Incentive Award dollar amounts
4

STEP		Calculation of Incentive Award Compensation Committee reviews Omnicom and peer group performance and calculates weighted score for each metric and final earned Incentive Award dollar amounts
5

STEP		Discretion Exercised Compensation Committee considers individual performance and any other factors deemed appropriate in order to determine whether to exercise negative or positive discretion, if any, and approves final Incentive Award dollar amounts
6

STEP		Allocation between Cash/Equity Compensation Committee determines allocation of Incentive Award between cash and equity
7

STEP		CEO/CFO Three-Year Performance Restricted Stock Awards That Vest in 2021 Compensation Committee awards PRSUs to CEO and CFO that vest in 2021 based on performance during the future three-year period
8

STEP		Restricted Stock Units to Other NEO’s Compensation Committee awards RSUs to NEOs other than CEO and CFO that vest over a five-year period
9

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ELEMENTS OF OMNICOM COMPENSATION AND FISCAL YEAR 2017 DECISIONS

For Messrs. Wren and Angelastro, our principal components of pay are a base salary and an Incentive Award based on 2017 performance, which is comprised of both a cash award and an award of PRSUs, which is further contingent upon the long-term performance of the Company.

For Messrs. Hewitt, Nelson and O’Brien, our principal components of pay are a base salary and an Incentive Award based on 2017 performance, which is comprised of both a cash award and an award of RSUs that vest ratably over a five-year period.

Although each named executive officer is eligible to receive an Incentive Award if his achievements so merit, the granting of an Incentive Award to any named executive officer is entirely at the discretion of the Compensation Committee. The Compensation Committee may choose not to award an Incentive Award to a named executive officer or to adjust the amount of the Incentive Award that results from the application of the measures described in this Compensation Discussion & Analysis, in each case in light of all factors deemed relevant by the Compensation Committee. In addition, to the extent achievement of the performance criteria may be impacted by changes in accounting principles and extraordinary, unusual or infrequently occurring events reported in Omnicom’s public filings, the Compensation Committee exercises its judgment whether to reflect or exclude their impact.

Each of these components and the manner in which decisions for 2017 were made for each NEO are more fully discussed in the sections that follow.

STEP		Base Salary Compensation Committee sets base salaries – Mr. Wren’s salary last increased 15 years ago
1

NEO Base Salaries:
John Wren President and Chief Executive Officer	$	1,000,000
Philip Angelastro Executive Vice President and Chief Financial Officer	$	850,000
Dennis Hewitt Treasurer	$	395,000
Jonathan Nelson Chief Executive Officer, Omnicom Digital	$	850,000
Michael O’Brien Senior Vice President, General Counsel and Secretary	$	700,000

The objective of base salary is to provide a portion of compensation to the named executive officer that is not “at risk” like incentive bonuses or equity awards, and is generally unaffected by fluctuations in company performance or the market in general. The base salaries for the named executive officers are determined by the Compensation Committee and, in the case of the President and Chief Executive Officer, ratified by the full Board.

Adjustments in base salary for named executive officers are discretionary and are generally considered no more frequently than every 24 months. In addition to Mr. Wren, Mr. O’Brien has not had an increase in base salary in 15 years. Prior to the increase he received in 2014 upon his appointment to Executive Vice President and Chief Financial Officer, Mr. Angelastro had not had an increase in base salary in nine years and his base salary has not increased further since his appointment.

Omnicom considers a number of factors when determining whether to make base salary adjustments, which factors may include advice from our compensation consultant, the general knowledge of our Chief Executive Officer and Compensation Committee of base salaries paid to similarly positioned executives, salaries paid historically, tax and accounting changes that may affect the Company, as well as personal performance as assessed by the Compensation Committee and the Chief Executive Officer. No formulaic base salary adjustments are provided to the named executive officers.

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Based on our Chief Executive Officer and the Compensation Committee’s general knowledge of base salaries paid to similarly positioned executives at companies of comparable size and profitability, review of data provided by Frederick W. Cook & Co. (“Cook & Co.”) (an independent third-party compensation consulting firm) and the Compensation Committee’s emphasis on performance-based compensation, no NEO’s base salary was adjusted in 2017.

Performance-Based Compensation Awards

As discussed above, under the Incentive Award Plan, eligible executive officers may, subject to Compensation Committee oversight and discretion (or in the case of the President and Chief Executive Officer, subject to Board input and ratification), receive an Incentive Award.

The following table summarizes the combination of quantitative performance measures the Compensation Committee considered for the Incentive Awards awarded in fiscal 2017, each of which is discussed in greater detail below:

Determination of Incentive Award:

(Short-term Cash Portion and Long-term Equity Portion)

STEP		Setting Performance Measures Compensation Committee sets quantitative performance measures for meriting an Incentive Award
2

Component	Weighting	Performance Measures		Rationale for Selection of Performance Metric
Performance Metric (OMC Targets)		■	Diluted EPS growth (33.3%)	■	Measures Company’s profitability
		■	EBITA margin (33.3%)	■	Measure intended to focus the Company on operating at sustainable, profitable levels
		■	Organic growth (33.3%)	■	Measures ability to drive revenue growth from existing operations, exclusive of acquisitions, dispositions and currency effects
Peer Metric (Performance Relative to Peers)		■	Return On Equity (40%)	■	Comprehensive means to evaluate various financial metrics and directly tied to the return to our common shareholders over time
		■	Organic growth (20%)	■	Measures ability to drive revenue growth from existing operations, exclusive of acquisitions, dispositions and currency effects
		■	Operating profit margin (20%)	■	Measure intended to focus the Company on operating at sustainable, profitable levels
		■	Organic growth plus operating profit margin (20%)	■	Measure designed to balance the contribution of each of these important metrics

We believe our goals are meaningful and challenging, the achievement of which is designed to drive shareholder value.

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STEP		Determining Multipliers Based on Performance Range Compensation Committee ascribes a range of predetermined multipliers based on the range of Omnicom performance with respect to each performance measure
3

PERFORMANCE METRIC (FINANCIAL PERFORMANCE VS. ANNUAL COMPANY TARGET) – 50% OF TARGET INCENTIVE AWARD

Performance Measure	Weight		Performance Range		Performance Multiplier
Diluted EPS Growth	33⅓	%	6.8% - 8.2	%	0.0 – 2.0
EBITA Margin	33⅓	%	13.5% - 14.1	%	0.0 – 2.0
Organic Growth	33⅓	%	2.3% - 3.7	%	0.0 – 2.0

The “Performance Metric” is based on Omnicom’s financial performance as compared to annual Company targets. The Compensation Committee considered the following performance measures for fiscal year 2017, with each measure weighted as indicated:

■ fully-diluted earnings per share growth (Diluted EPS) growth (33.3%)

■ earnings before interest, taxes and amortization (EBITA) margin (33.3%)

■ organic growth (33.3%)

Performance Metric
(50% of Target Incentive Award)

Organic growth is total revenue growth less the change in revenue attributable to changes in foreign exchange rates and the revenue from businesses acquired net of the revenue from businesses that were disposed. A predetermined multiplier of between 0.0 and 2.0 (the “Performance Multiplier”) was ascribed based on the range of Omnicom performance with respect to each performance measure as shown above. The Performance Multiplier is applied to each metric’s weighting within the category based on the results achieved to arrive at a weighted score (the “Performance Weighted Score”).

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PEER METRIC (FINANCIAL PERFORMANCE VS. INDUSTRY PEER GROUP) – 50% OF TARGET INCENTIVE AWARD

Performance Measure	Weight		Rank	Peer Multiplier
ROE	40	%	1-4	0.4 – 2.0
Organic Growth	20	%	1-4	0.4 – 2.0
Operating Profit Margin	20	%	1-4	0.4 – 2.0
Organic Growth + Operating Profit Margin	20	%	1-4	0.4 – 2.0

The “Peer Metric” is based on Omnicom’s financial performance as compared to an industry peer group. The Compensation Committee considered the following performance measures for fiscal year 2017 as compared to that of an industry peer group, which included WPP plc, Publicis Groupe SA and The Interpublic Group of Companies, Inc. (the “Peer Metric Group”), with each measure weighted as indicated:

■ return on equity (ROE) (40%)

■ organic growth (20%)

■ operating profit margin (20%)

■ organic growth plus operating profit margin (20%)

A predetermined multiplier of between 0.4 and 2.0 (the “Peer Multiplier”) was ascribed based on Omnicom’s ranking relative to the Peer Metric Group for each metric. The Peer Multiplier was applied to each metric’s weighting within the category based on the results achieved to arrive at a weighted score (the “Peer Weighted Score”).

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STEP		Setting Target and Maximum Incentive Award Dollar Amounts Compensation Committee sets maximum and target Incentive Award dollar amounts
4

Compensation Committee sets maximum and target Incentive Award dollar amounts

Name of Executive	Threshold	Target		Maximum
John Wren	$0	$	18,920,000	$	37,840,000
Philip Angelastro	$0	$	5,350,000	$	10,700,000
Dennis Hewitt	$0	$	800,000	$	1,600,000
Jonathan Nelson	$0	$	2,750,000	$	5,500,000
Michael O’Brien	$0	$	2,125,000	$	4,250,000

For performance in fiscal year 2017, we established a maximum incentive compensation level and a target incentive compensation level set at a percentage of the maximum incentive compensation level, which are shown above and in the “Grants of Plan-Based Awards in 2017” table. As described below, the Compensation Committee generally consults with its compensation consultant to determine the range of total compensation for similarly positioned executives at our peer group companies. The Compensation Committee takes the information provided in the compensation consultant report into consideration when determining the Incentive Award target for our named executive officers.

STEP		Calculation of Incentive Award Compensation Committee reviews Omnicom and peer group and calculates weighted score for each metric and final earned Incentive Award dollar amounts
5

COMPANY TARGETS PERFORMANCE METRIC CALCULATION

In calculating the performance metric results related to diluted EPS growth, we made two adjustments, aggregating $85.5 million, to 2017 reported net income so that it would be comparable to 2016: (i) excluded the negative effect on net income of $106.3 million attributable to additional tax expense recognized as a result of the Tax Act (as discussed in Note 10 to the financial statements in our 2017 10-K) and (ii) excluded the positive effect on net income of $20.8 million arising from the excess tax benefits related to share based compensation resulting from the adoption of ASU 2016-09 (as discussed in Note 9 to the financial statements in our 2017 10-K).

	Target Range and 2017 Performance	Performance Multiplier	Relative Weight	Weighted Score
Diluted EPS growth		0.000	33.3%	0.000
EBITA margin		2.000	33.3%	0.667
Organic growth		1.000	33.3%	0.333
				1.000
Performance Weighted Score of 1.000 x metric weighting of 50%				50%

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COMPANY PERFORMANCE VS. INDUSTRY PEER GROUP PEER METRIC CALCULATION

	2017 Performance		Peer Metric Group Rank	Weight		Peer Multiplier	Weighted Score
ROE	45.6	%	1	40	%	2.000	0.800
Organic growth	3.0	%	1	20	%	2.000	0.400
Operating Profit margin	13.5	%	2	20	%	1.500	0.300
Organic growth + Operating Profit margin	16.5	%	1	20	%	2.000	0.400
							1.900
Peer Weighted Score of 1.900 x metric weighting of 50%							95	%

Fiscal Year 2017 Calculation of Earned Compensation

Name	Target Incentive Compensation		Performance Weighted Score		Peer Weighted Score		Combined Score		Total Incentive Award Earned
John Wren	$	18,920,000	50	%	95	%	145	%	$	27,434,000
Philip Angelastro	$	5,350,000	50	%	95	%	145	%	$	7,758,000
Dennis Hewitt	$	800,000	50	%	95	%	145	%	$	1,160,000
Jonathan Nelson	$	2,750,000	50	%	95	%	145	%	$	3,988,000
Michael O’Brien	$	2,125,000	50	%	95	%	145	%	$	3,081,000

STEP		Discretion Exercised Compensation Committee considers the following qualitative factors regarding each NEO’s 2017 performance and the additional considerations described below to determine whether to exercise negative or positive discretion, if any, and approves final Incentive Award dollar amounts
6

QUALITATIVE FACTORS

The Compensation Committee, with the assistance of Omnicom’s President and Chief Executive Officer, looked to determine how each named executive officer contributed to advancing the core “pillars” that serve as the foundation of our business strategy: providing best in class services to clients, maximizing efficiencies and minimizing risk through enterprise-wide initiatives and achieving the highest levels of corporate values and integrity.

1.   Best in Class Client Services. We achieve this goal by securing the finest available talent in the right disciplines, and deploying that talent in the right places across the globe. The Compensation Committee looks to the role a named executive officer has played in developing our personnel and our client and discipline base. With respect to each, the Compensation Committee reviews an executive’s role, as applicable, in:

■ Personnel development

■ Providing management development and succession planning

■ Recruiting and retaining key and diverse talent

■ Training and educating personnel

■ Client development

■ Retaining clients/business

■ Expanding the depth and breadth of our core clients

■ Developing new client relationships

■ Services development

■ Developing the quality and breadth of our key services

■ Expanding our global presence in the right places

■ Planning acquisitions and divestitures

■ Receiving honors and awards for creative excellence and customer service

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2.

Enterprise-wide initiatives to maximize efficiencies and minimize risk. Next, our finance and operations team strives to maximize efficiencies and minimize risk through enterprise-wide initiatives that create a high return on invested capital. The Compensation Committee reviews each executive’s involvement in key business management issues such as cash management, business planning, Enterprise Risk Management, information technology initiatives/consolidation, developing and streamlining financial reporting operations and working capital management.

3.

Corporate values and integrity. Finally, Omnicom’s leadership strives to achieve the highest levels of corporate values and integrity. The Compensation Committee considers how each executive contributed to Omnicom’s substantial efforts to maximize diversity and inclusion, to achieve the highest levels of corporate social responsibility, including a commitment to environmental and individual community outreach initiatives, and to maintain a professional work-place environment.

Discretion: Qualitative Factors

The Compensation Committee, with the assistance of Omnicom’s President and Chief Executive Officer for NEOs other than himself, considered the following contributions of each NEO toward advancing our business strategy in determining whether to exercise positive or negative discretion.

John D. Wren. Under Mr. Wren’s leadership, Omnicom has grown into one of the world’s largest and most respected advertising and marketing communications firms. As part of the original management team that created Omnicom in 1986 and as the Company’s chief executive officer since 1997, he has been the architect of a complex strategy that has positioned Omnicom to serve the global marketing requirements of the world’s most sophisticated marketers. He has championed the creation of unique virtual client networks across Omnicom agencies, geographies and disciplines to meet the needs of global clients. He was early to envision the potential of digital technologies, leading the Company’s early investment in and development of digital technologies and capabilities across each of Omnicom’s agencies and he continues to drive our strategy to leverage our digital and analytical capabilities and utilize new mediums and technology platforms. He has also been instrumental in leading the Company’s efforts to extend and deepen Omnicom’s capabilities in rapidly growing markets and new service areas to meet the needs of clients’ global marketing efforts. Throughout this evolution of the Company, Mr. Wren has ensured that Omnicom agencies and networks have continued to build on their strong legacy of creative excellence. Today, Omnicom’s networks and agencies are regarded as the industry’s most creative, as measured by their share of global awards for creative excellence.

Mr. Wren is responsible for the organizational changes and strategic investments Omnicom has been implementing over the past couple of years. As a result of his insight into the changing needs of our clients and to better capture the expanded scope of our services, Mr. Wren developed and executed the creation of our practice areas to bring together agencies operating in common disciplines to create additional custom client solutions. We now have Practice Areas established for Healthcare, Public Relations, Precision Marketing and CRM, National Brand Advertising, Experiential, Specialty Marketing, Brand Consulting and Research, and our global advertising agency networks. He also led the efforts to simplify our service offerings through our key client matrix organization structure, our client-centric business model requiring multiple agencies within Omnicom to collaborate in formal and informal virtual client networks. The demands of clients, consumers and new technologies are pushing agencies to work faster. Our new organizational structure is designed to deliver more innovation, ideas, and growth in a nimble and flexible fashion so we can adjust quickly as our clients’ needs change.

Mr. Wren has also long been instrumental in identifying, attracting, retaining and developing highly skilled key executives and is deeply committed to disseminating best practices across Omnicom through industry-leading advanced education initiatives such as Omnicom University.

The strategies designed and implemented by Mr. Wren not only delivered solid financial results at a challenging time for our industry, but also positioned Omnicom to better respond to its clients’ future business needs. Mr. Wren’s emphasis on expanding client relationships, as well as his direct leadership role with many of the Company’s largest global clients, again resulted in organic revenue growth. Such growth, along with Mr. Wren’s focus on improving operating efficiencies, through initiatives to leverage Omnicom’s scale in areas such as real estate, information technology, back-office services and procurement, while maintaining key investments in both our talent and new service areas resulted in a return on invested capital of 24.1%, and return on equity of 45.6%.

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Under Mr. Wren’s leadership in 2017, Omnicom’s balance sheet and liquidity remained strong and the Company returned a significant amount of capital to our shareholders, including approximately $1.1 billion in dividends and share repurchases, net of proceeds from stock plans. Over the past ten years under Mr. Wren’s leadership, the Company has returned over 100% of its cumulative net income to Omnicom shareholders in the form of dividends and share repurchases. Since becoming Chief Executive Officer, Mr. Wren has built and led a management team under whose stewardship Omnicom has averaged an annual return on equity of greater than 25%.

Philip J. Angelastro. Mr. Angelastro provided key leadership and financial management for our Company. He managed the Company’s capital and liquidity, oversaw the management of risk and the strengthening of the Company’s balance sheet. He also supervised the enhancement of Omnicom’s financial planning and analysis process and helped to drive initiatives to leverage Omnicom’s scale in areas such as real estate, information technology, back-office services and procurement. Working with Mr. Wren and our senior network management teams, Mr. Angelastro continued to improve our working capital management programs, an important effort in maintaining Omnicom’s overall financial performance. Mr. Angelastro prioritized the development of the skills of our finance and operating personnel and implemented programs for their ongoing professional development. He oversaw the Company’s efforts in the areas of corporate ethics, enterprise risk management and global corporate social responsibility. In addition, during 2017, Mr. Angelastro continued to oversee the Company’s financial reporting function as well as its efforts to define and implement accounting policies and procedures for all Omnicom companies. Mr. Angelastro also managed Omnicom’s global income tax function, its Sarbanes Oxley compliance activities, as well as its U.S. health and welfare and retirement plans.

Dennis E. Hewitt. Mr. Hewitt successfully supported the Chief Financial Officer in developing and maintaining our overall capital structure, which includes public debt offerings, revolving credit facilities, commercial paper program, bank lines of credit and leasing programs and stock repurchase activities. He successfully oversaw (i) global property and casualty insurance programs and related insurance activities; (ii) capital expenditure planning and administration of related leasing activity; and (iii) management of global working capital performance, including credit management. Mr. Hewitt led his department’s efforts to provide global liquidity with interconnected regional treasury centers that fund operating units and daily cash requirements. He also had responsibility for managing the Company’s foreign exchange exposure and derivatives. He has coordinated global corporate social responsibility projects involving financial employees through Omnicom Cares.

Jonathan Nelson. As CEO of Omnicom Digital, Mr. Nelson oversees Omnicom’s digital strategy, one of our fastest growing capabilities. A veteran of Omnicom since 2002, last year Mr. Nelson continued to spearhead the integration of digital capabilities across Omnicom’s portfolio companies. He also successfully led the continued global development of our data, analytics and content management platforms, digital services, technical and data partnerships, and search and programmatic media capabilities. Mr. Nelson also takes a leading role in the recruitment of talent for our digital services and in mergers and acquisitions in the digital landscape. Mr. Nelson is widely recognized as an industry thought leader, appearing in print in The New York Times, USA Today, Forbes, Newsweek, and Ad Week and on television on CNN, CNBC, and MSNBC.

Michael J. O’Brien. Mr. O’Brien successfully led the Company’s worldwide legal team, managed legal services provided to the Company, and monitored the Company’s compliance with all applicable laws, rules and regulations around the world. He played a lead role in setting priorities and agendas for the Company’s Board of Directors and its committees, providing them with advice on corporate governance developments and best practices, as well as legal risks and requirements. He continued to oversee the implementation of several important corporate governance initiatives, including our comprehensive shareholder engagement efforts, the results of which proved successful at our 2017 Annual Meeting of Shareholders. Mr. O’Brien was also instrumental to the implementation of initiatives to increase diversity throughout the Company. He played a key role in (i) structuring, implementing and managing compensation and benefits programs; (ii) protecting the Company’s intellectual property; (iii) overseeing legal aspects of the Company’s acquisition and financing activities; and (iv) managing the governance of the Company’s many legal entities. In addition, Mr. O’Brien managed the Company’s litigation matters and developed effective litigation strategies.

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Exercise of Negative Discretion

After considering the qualitative factors described above, the Compensation Committee, pursuant to Mr. Wren’s recommendation, agreed that it was prudent for the Committee to exercise discretion to reduce the amount of each Incentive Award in order to reallocate the funds to the general incentive compensation pool to be reallocated to other employees.

Name	Total Incentive Award Earned		Discretion		Total Final Incentive Award
John Wren	$	27,434,000	($	4,634,000)	$	22,800,000
Philip Angelastro	$	7,758,000	($	1,358,000)	$	6,400,000
Dennis Hewitt	$	1,160,000	($	260,000)	$	900,000
Jonathan Nelson	$	3,988,000	($	248,000)	$	3,740,000
Michael O’Brien	$	3,081,000	($	421,000)	$	2,660,000

STEP		Allocation between Cash/Equity Compensation Committee determines allocation of Incentive Award between cash and equity
7

Name	Total Final Incentive Award		Cash Portion		Dollar Value of Equity Portion
John Wren	$	22,800,000	$	12,540,000	$	10,260,000
Philip Angelastro	$	6,400,000	$	3,200,000	$	3,200,000
Dennis Hewitt	$	900,000	$	450,000	$	450,000
Jonathan Nelson	$	3,740,000	$	1,870,000	$	1,870,000
Michael O’Brien	$	2,660,000	$	1,330,000	$	1,330,000

The Incentive Award earned by each NEO is payable at the discretion of the Compensation Committee in cash and/or equity-based awards. It is Omnicom’s philosophy that its named executive officers should be rewarded based upon Omnicom’s financial performance as well as each executive’s contribution to advancing Omnicom’s business strategy and our long-term performance. The Committee believes that grants of equity awards serve to align the interests of the shareholders with those of the named executive officers by incentivizing the named executive officers toward the creation and preservation of long-term shareholder value. In addition, our equity award agreements contain restrictive covenants that are intended to protect our business in the event of an executive’s departure.

As shown above, a portion of Messrs. Wren and Angelastro’s Incentive Award was paid in cash and a portion was paid in PRSUs, which are eligible to vest in 2021 based on the future performance of the Company compared to our Peer Metric Group. A portion of the Incentive Award paid to each other NEO was paid in cash and a portion was paid in RSUs, which vest ratably over a five-year period. These equity awards are further described in the remaining steps.

STEP		CEO/CFO Three-Year Performance Restricted Stock Awards That Vest in 2021 Compensation Committee awards PRSUs to CEO and CFO that vest in 2021. The amount that vests is based on performance during a future three-year period.
8

Name	Maximum Potential Value of 2021 PRSUs on the Grant Date		Number of 2021 PRSUs Awarded (Dollar Value Divided by Closing Price on Grant Date)
John Wren	$	10,260,000	139,175
Philip Angelastro	$	3,200,000	43,407

The PRSUs awarded to Messrs. Wren and Angelastro are contingent upon further performance conditions of the Company by tying the percentage that is earned over a future three-year period to the Company’s return on equity compared to our Peer Metric Group. The Compensation Committee believes return on equity provides a consistent and comprehensive

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measure to assess Omnicom’s relative performance. The Compensation Committee believes using return on equity as the single performance measure achieves clear and simple peer group comparison, and serves as a comprehensive means to evaluate various financial metrics. In addition, return on equity is a measure directly tied to the return to our common shareholders over the long term.

The maximum number of PRSUs that each is eligible to receive under this award is equal to the dollar value of the portion of the 2017 Incentive Award paid in PRSUs, as set forth in the Summary Compensation Table below, divided by the closing price of our common stock on Mach 13, 2018, the date the PRSUs were awarded ($73.72).

PRSUs are designed to reward individual contributions to the Company’s performance as well as motivate future contributions and decisions aimed at increasing shareholder value over time. In 2021, our average return on equity over calendar years 2018, 2019 and 2020 will be compared to the average return on equity for each member of the Peer Metric Group for the same three-year period and Omnicom’s rank amongst these competitors will be determined. The following chart shows (i) the percentage of the maximum number of PRSUs that Messrs. Wren and Angelastro will receive upon vesting in 2021 depending on Omnicom’s relative rank and (ii) the dollar value of those shares assuming the closing price of our common stock on March 13, 2018, the date the PRSUs were awarded ($73.72). The ultimate value received by the NEO will depend on the vesting of the awards and the value of our common stock.

Metrics for 2021 Vesting of PRSUs

Omnicom Rank vs. Peer Metric Group (ROE for 2018-2020)	Percentage of PRSUs Vesting		CEO: Number of Shares Received Based on Performance	CEO: Value at Grant Date of Shares Received Based on Performance		CFO: Number of Shares Received Based on Performance	CFO: Value at Grant Date of Shares Received Based on Performance
1-2	100	%	139,175	$	10,260,000	43,407	$	3,200,000
3	67	%	92,783	$	6,840,000	28,938	$	2,133,333
4	34	%	46,392	$	3,420,000	14,469	$	1,066,667

In the event Mr. Wren or Mr. Angelastro terminates employment on or prior to December 31, 2020, he will remain eligible to vest in one-third of the maximum number of PRSUs for each December 31st he is employed between March 13, 2018 and December 31, 2020 and such shares will be distributed in 2021 based on Omnicom’s relative return on equity performance. Dividend equivalents will be reserved on the maximum number of PRSUs to which the executive is entitled at such times as dividends are paid to shareholders of Omnicom. At the time the PRSUs vest, the dividend equivalent payments that have accumulated will be paid in cash. Vesting of the PRSUs and distribution of shares underlying the PRSUs will be accelerated in the event of death or termination due to disability. In addition, if the PRSUs are not assumed or substituted by an acquirer in a change in control, then they will become fully vested and non-forfeitable.

Messrs. Wren and Angelastro are required to retain a certain amount of Company’s equity/stock as described in “Executive Compensation Related Practices, Policies and Guidelines – Executive Stock Ownership Guidelines.”

STEP		Restricted Stock Units to Other NEO’s Compensation Committee awards RSUs to NEOs other than CEO and CFO that vest over a five-year period
9

	Maximum Potential Value of RSUs on the Grant Date (vest ratably from 2019-2023)		Number of RSUs Awarded (Dollar Value Divided by Closing Price on Grant Date)
Dennis Hewitt	$	450,000	6,105
Jonathan Nelson	$	1,870,000	25,369
Michael O’Brien	$	1,330,000	18,040

The Compensation Committee paid a portion of the Incentive Award for performance in 2017 in RSUs for Messrs. Hewitt, Nelson and O’Brien. The maximum number of RSUs that each is eligible to receive under this award is equal to the dollar value of the portion of the 2017 Incentive Award paid in RSUs divided by the closing price of our common stock on March 13, 2018, the date the RSUs were awarded ($73.72).

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The Compensation Committee believes that service-based vesting of the RSUs is an important motivator to reward continued performance. One-fifth of each award of RSUs is eligible to vest on each of the first five anniversaries of the grant date and each RSU represents the right to receive one share of our common stock upon vesting. Vesting of the RSUs and distribution of shares underlying the RSUs will be accelerated in the event of death or termination due to disability. In addition, if the RSUs are not assumed or substituted by an acquirer in a change in control, then they will become fully vested and non-forfeitable.

OTHER EXECUTIVE COMPENSATION ARRANGEMENTS

SERCR Plan and Executive Salary Continuation Plan Agreements. Omnicom has entered into Award Agreements with Messrs. Wren and Angelastro pursuant to the Senior Executive Restrictive Covenant and Retention Plan, which was adopted in December 2006 (the “SERCR Plan”) and Executive Salary Continuation Plan Agreements with Messrs. Hewitt and Nelson. These arrangements are discussed in greater detail in the section below entitled “Potential Payments Upon Termination of Employment or Change in Control.”

Participation in the SERCR Plan was determined to be offered by the Compensation Committee based on the value of the benefit provided to Omnicom through the restrictive covenants contained in the SERCR Plan, as a retention mechanism to seek to secure the services of the participants by providing post-employment benefits, subject to a minimum period of employment and based on the Compensation Committee’s analysis of the future financial impact of various termination payout scenarios on each of these recipients and on Omnicom. In making the decision to extend these benefits, the Compensation Committee relied on the advice of its independent compensation consultant, Cook & Co., that the program is representative of market practice, both in terms of design and cost.

Amounts payable to each of Messrs. Hewitt and Nelson under his Executive Salary Continuation Plan Agreement are based on past company practice and are in consideration for the covenants to consult and not to compete during the service period of the agreement. The Compensation Committee believes that these benefits are essential in helping Omnicom fulfill its objectives of attracting and retaining key executive talent.

Deferred Restricted Stock and Restricted Stock Unit Plans. Each of our named executive officers was previously eligible to defer, at his election, some or all of the shares of restricted stock and restricted stock units that otherwise would have vested in a given year. No NEO made such an election in 2017. Balance and payment information with respect to prior elections is reflected in the Nonqualified Deferred Compensation Table in 2017 on page 60 below. Omnicom pays participants an amount equal to the cash dividends that would have been paid on the shares or units in the absence of a deferral election, subject to the participant’s employment with Omnicom on the record date of such dividends.

Retirement Savings Plan. Omnicom sponsors the Omnicom Group Retirement Savings Plan, which is a tax-qualified defined contribution plan. All employees who meet the Plan’s eligibility requirements may elect to participate in the 401(k) feature of the Plan and may also receive a discretionary company profit sharing contribution after the end of the Plan year based on the Plan’s provisions.

Insurance. In 2017, Omnicom paid employer premiums for life insurance for Messrs. Wren, Hewitt and O’Brien.

Other perquisites. We procure aircraft usage from an unrelated third-party vendor. In some instances, Omnicom makes available to the named executive officers personal use of corporate aircraft hours. The dollar amount reported in the Summary Compensation Table for personal use of aircraft hours reflects the aggregate incremental cost to Omnicom, based on payments we make which are equal to the vendor’s hourly charge for such use and landing fees, minus the amount Omnicom is reimbursed by the executive for his use on the aircraft. Each executive reimburses Omnicom for at least the amount calculated based on the Standard Industry Fare Level (SIFL) tables prescribed under IRS regulations promptly after the cost of the flight is incurred. Additional perquisites and benefits are set forth in the notes to the Summary Compensation Table for 2017 on page 58.

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EXECUTIVE COMPENSATION RELATED PRACTICES, POLICIES AND GUIDELINES

Role of the Independent Compensation Consultant. Because of the competitive nature of our business, the loss of key executives to competitors is a significant risk and Omnicom’s paramount concern is to attract and retain the highest-caliber executive team to ensure that Omnicom is managed in the most effective possible manner. The Compensation Committee directly retains the services of Cook & Co., an independent third-party compensation consulting firm, for input on a range of external market factors, including evolving compensation trends, and market-standard compensation levels and elements. Cook & Co. reports directly and exclusively to the Compensation Committee. Cook & Co. only provides compensation consulting services to the Compensation Committee, and works with Omnicom’s management only on matters for which the Compensation Committee is responsible. Moreover, Cook & Co. does not perform any other services for, or receive any other fees from, the Company or any of its subsidiaries other than in connection with its work for the Compensation Committee. Cook & Co. stated that it holds no Omnicom stock and the Compensation Committee believes the services Cook & Co. provides for the Company do not raise any conflicts of interest.

Market-Competitive Compensation. The Compensation Committee consults with Cook & Co. to obtain general observations on the Company’s compensation programs from which the Compensation Committee determines the target range of total compensation for executives. Though Cook & Co. provides general observations on the Company’s compensation programs, it does not determine or recommend specific amounts or forms of compensation for the named executive officers. Although the data provided by Cook & Co. influenced the Compensation Committee’s review and analysis, such data did not have a material impact on the Compensation Committee’s determination of the levels and elements of our executive compensation. The peer group the Compensation Committee reviewed consisted of companies of comparable size and operational complexity. The peer group differed from that reviewed last year in the following ways: DXC Technology Company was created through the merger of Computer Sciences Corporation with another entity, so it was added and Computer Sciences Corporation was removed. Cablevision and Time Warner Cable were each acquired, so they were both removed. Nielson Holdings PLC and Cognizant Technology Solutions were added because we believe them to be similar to us based on size, primarily measured by revenue, and are in the service industry and therefore comparable from a business perspective, including with respect to capital allocation. The group was comprised of the following companies:

■Accenture ■Automatic Data Processing ■CBS ■Cognizant Technology Solutions ■DISH Network ■DXC Technology Company ■Interpublic Group of Companies ■Nielson Holdings plc ■Thomson Reuters ■Time Warner Inc. ■Viacom ■WPP plc

Accounting and Tax Considerations

IRC SECTION 162(m)

Prior to the passage of the Tax Act, Section 162(m) of the Internal Revenue Code (the “Code”) generally limited to $1 million the U.S. federal income tax deductibility of compensation paid in one year to a corporation’s Chief Executive Officer and certain other executive officers. Compensation that qualified as “performance-based” under Section 162(m) of the Internal Revenue Code was exempt from this $1 million limitation. As part of the Tax Act, the ability to rely on this “qualified performance-based compensation” exception was eliminated, and the limitation on deductibility was generally expanded to include all named executive officers. Although we maintain compensation arrangements that were intended to qualify as performance-based compensation under Section 162(m) of the Code prior to the Tax Act, subject to certain transition relief rules, we may no longer take a deduction for any compensation paid to our covered employees in excess of $1 million. Furthermore, although the Compensation Committee may have taken action intended to limit the impact of Section 162(m) of the Code, it also believes that the tax deduction is only one of several relevant considerations in setting compensation. The Compensation Committee believes that shareholder interests are best served by not restricting the Compensation Committee's discretion and flexibility in structuring compensation programs, even though such programs may result in non-deductible compensation expenses. Accordingly, achieving the desired flexibility in the design and delivery of compensation may have resulted (and may continue to result, in light of the recent changes in law) in compensation that in certain cases is not deductible for federal income tax purposes.

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ACCOUNTING FOR SHARE-BASED COMPENSATION

Omnicom accounts for share-based compensation including its RSUs in accordance with Financial Accounting Standards Board Accounting Standards Codification Topic 718 (“ASC Topic 718”), Compensation — Stock Compensation.

Risk Assessment in Compensation Programs

We have assessed the Company’s compensation programs and have concluded that our compensation policies and practices do not create risks that are reasonably likely to have a material adverse effect on the Company. Cook & Co. was previously retained by the Compensation Committee to assist Omnicom’s management in reviewing our executive and broad-based compensation and benefits programs on a worldwide basis to determine if the programs’ provisions and operations are likely to create undesired or unintentional risk of a material nature. This risk assessment process included a review of program policies and practices; analysis to identify risk and risk control related to the programs; and determinations as to the sufficiency of risk identification, and the balance of potential risk to potential reward. Although we reviewed all compensation programs, we focused on the programs with variability of payout, with the ability of a participant to affect directly payout and the controls on participant action and payout.

Based on the foregoing and the fact that, since Cook & Co. assisted the Company in its review, we believe no subsequent change in the Company’s compensation programs creates risks reasonably likely to have a material adverse effect on the Company, we believe that our compensation policies and practices do not create inappropriate or unintended significant risk to the Company as a whole. We also believe that our incentive compensation arrangements provide incentives that do not encourage risk-taking beyond the organization’s ability to effectively identify and manage significant risks; are compatible with effective internal controls and our risk management practices; and are supported by the oversight and administration of the Compensation Committee with regard to executive compensation programs.

Policies

The following table briefly summarizes the policies and guidelines Omnicom has adopted over the years to strengthen our pay practices, each of which is discussed in detail below:

Policy/Guidelines	Summary
Executive Stock Ownership Guidelines	The guidelines that require our President and Chief Executive Officer and Chief Financial Officer to hold shares of Omnicom common stock with a value equal to the specified multiples of base salary indicated below.
Compensation Forfeiture/ Clawback Policy	Policy provides that in the event a material restatement of our financial statements is caused by a fraudulent or intentionally illegal act of one of our officers, a committee of non-management members of our Board (the “Clawback Committee”) may recover a portion of the annual performance-based cash bonus paid and any performance-based equity awards granted to such officer with respect to the period covered by the restatement.
Equity Compensation Policy	Policy regarding the grant of equity awards covering topics such as approval requirements, grant date, and establishing exercise price.
Policy Regarding Death Benefits	Policy provides that shareholder approval is required for any future compensation arrangements, with certain exceptions, that would require the Company to make payments or awards following the death of an NEO in the form of unearned salary or bonuses, accelerated vesting or the continuation in force of unvested equity grants, awards of ungranted equity or perquisites.
Policy Statement Regarding Hedging	Policy statement regarding hedging, which provides, in general, that no director, NEO or network CEO may purchase any financial instrument designed to hedge or offset any decrease in the market value of equity securities of the Company.

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Executive Stock Ownership Guidelines. We have adopted Executive Stock Ownership Guidelines that require our President and Chief Executive Officer and Chief Financial Officer to hold shares of Omnicom common stock with a value equal to the specified multiples of base salary indicated below. These guidelines ensure that they build and maintain a long-term ownership stake in Omnicom’s stock that will align their financial interests with the interests of the Company’s shareholders. The applicable guidelines for Messrs. Wren and Angelastro are as follows:

Position of Executive Officer	Ownership Target
President and Chief Executive Officer of Omnicom		6 x Annual Base Salary
Chief Financial Officer of Omnicom		3 x Annual Base Salary

The guidelines were adopted in the first quarter of 2010 and the executives have five years from the date of the adoption of the guidelines or from the date of their appointment to attain the ownership levels. For purposes of the guidelines, the value of an executive’s stock ownership includes all shares of the Company’s common stock owned by the executive outright (inclusive of unvested equity awards such as restricted shares or units and PRSUs) or held in trust for the executive and his or her immediate family, plus the executive’s vested deferred stock and allocated shares of the Company’s common stock in employee plans. As of December 31, 2017, both Messrs. Wren and Angelastro were in compliance with the guidelines.

Compensation Forfeiture/Clawback Policy. Our Board has adopted an Executive Compensation Clawback Policy covering compensation paid with respect to any period beginning on or after January 1, 2010, to certain of our officers, including our named executive officers. Under this policy, in the event a material restatement of our financial statements is caused by a fraudulent or intentionally illegal act of one of our officers, the non-management members of the Clawback Committee will review the annual performance-based cash bonus paid and any performance-based equity awards granted to such officer with respect to the period covered by the restatement. If the Clawback Committee determines that the amount of such awards would have been lower had they been determined based on such restated financial statements, it may seek to recover the after-tax portion of the difference, including, with respect to equity awards, any gain realized on the sale of any such shares.

Equity Compensation Policy. Omnicom has adopted a policy regarding grants of equity awards, which provides, among other things, that grants of equity awards to non-employee members of the Board shall be approved by the full Board and any other grants must be approved by the Compensation Committee. With limited exception, the grant date of any equity award will be the date of the Board or Committee meeting at which the award is approved and the exercise price, if applicable, will be no less than the closing price of Omnicom’s common stock on such date.

Policy Regarding Death Benefits. On February 10, 2011, Omnicom’s Board of Directors adopted a policy regarding death benefits, which provides, among other things, that shareholder approval is required for any future compensation arrangements that would require the Company to make payments, grants or awards following the death of a named executive officer in the form of unearned salary or bonuses, accelerated vesting or the continuation in force of unvested equity grants, awards of ungranted equity or perquisites. The policy would not apply to payments, grants or awards of the sort offered to other Company employees and does not apply to arrangements existing at the time the policy was adopted.

Policy Statement Regarding Hedging. In February 2013, Omnicom’s Board of Directors adopted a policy statement regarding hedging, which provides, in general, that no director, NEO or network chief executive officer may purchase any financial instrument designed to hedge or offset any decrease in the market value of equity securities of the Company.

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Summary Compensation Table for 2017

Name and Principal Position of Executive	Year	Salary ($)		Bonus ($)(2)	Non-Equity Incentive Plan Compensation ($)(1)						All Other Compensation ($)(5)		Total ($)
					Incentive Award
					Cash Portion		Max. Potential Value of Long-Term Equity Portion at Grant Date
							PRSUs(3)		RSUs(4)
John D. Wren President and Chief Executive Officer	2017	$	1,000,000	—	$	12,540,000	$	10,260,000		—	$	159,325	$	23,959,325
	2016	$	1,000,000	—	$	13,640,000	$	11,160,000		—	$	179,039	$	25,979,039
	2015	$	1,000,000	—	$	12,320,000	$	10,080,000		—	$	176,047	$	23,576,047
Philip J. Angelastro Executive VP and Chief Financial Officer	2017	$	850,000	—	$	3,200,000	$	3,200,000		—	$	15,300	$	7,265,300
	2016	$	850,000	$1,130,000	$	2,470,000	$	3,600,000		—	$	15,150	$	8,065,150
	2015	$	850,000	—	$	2,695,000	$	2,695,000		—	$	15,150	$	6,255,150
Dennis E. Hewitt Treasurer	2017	$	395,000	—	$	450,000		—	$	450,000	$	33,545	$	1,328,545
	2016	$	395,000	—	$	450,000		—	$	450,000	$	32,138	$	1,327,138
	2015	$	395,000	—	$	450,000		—	$	450,000	$	30,989	$	1,325,989
Jonathan B. Nelson Chief Executive Officer, Omnicom Digital	2017	$	850,000	—	$	1,870,000		—	$	1,870,000	$	8,100	$	4,598,100
	2016	$	850,000	—	$	2,000,000		—	$	1,470,000	$	7,950	$	4,327,950
	2015	$	850,000	—	$	2,000,000		—	$	1,080,000	$	7,950	$	3,937,950
Michael J. O’Brien Senior VP, General Counsel and Secretary	2017	$	700,000	—	$	1,330,000		—	$	1,330,000	$	11,774	$	3,371,774
	2016	$	700,000	—	$	1,431,000		—	$	1,431,000	$	11,291	$	3,573,291
	2015	$	700,000	—	$	1,225,000		—	$	1,225,000	$	11,007	$	3,161,007

(1)	All amounts reported are amounts paid pursuant to Omnicom’s Incentive Award Plan.
(2)	The amount shown represents the discretionary bonus awarded by the Compensation Committee that was in excess of the Incentive Award amount.
(3)	The PRSU portion of the Incentive Award reported above is equal to the dollar value of the portion of the award that the Compensation Committee, in its discretion, elected to pay in PRSUs. As further described above in the section entitled “Executive Compensation: Compensation Discussion and Analysis”, vesting of the PRSUs is contingent upon the future performance of the Company over a three-year period compared to our industry Peer Metric Group. The amount reported represents the maximum amount that may be paid with respect to the PRSUs, determined using the value of the underlying common stock on the date of the award. The ultimate value received by the NEO will depend on the number of PRSUs that ultimately vest and the value of the underlying common stock on the date of vesting.
(4)	The RSU portion of the Incentive Award reported above is equal to the dollar value of the portion of the award that the Compensation Committee, in its discretion, elected to pay in RSUs. As further described above in the section entitled “Executive Compensation: Compensation Discussion and Analysis”, the RSUs vest ratably over a five-year period. The amount reported represents the maximum amount that may be paid with respect to the RSUs, determined using the value of the underlying common stock on the date of the award. The ultimate value received by the NEO will depend on the number of RSUs that ultimately vest and the value of the underlying common stock on the date of vesting.
(5)	All Other Compensation consists of each of the following:
	■Perquisites and other personal benefits, which are valued based on the aggregate incremental cost to Omnicom. ■The total perquisites and other personal benefits include: for Mr. Wren, personal use of aircraft hours ($130,000), an auto allowance ($9,120) and a medical allowance ($4,000); for Mr. Angelastro an auto allowance ($7,200); and for Mr. Hewitt, an auto allowance ($7,200) and a medical allowance ($4,000). ■Employer contributions to one or more retirement savings plans: for Mr. Wren ($8,100), Mr. Angelastro ($8,100), Mr. Hewitt ($8,100), Mr. Nelson ($8,100) and Mr. O’Brien ($8,100). ■Employer premium payments for life insurance: for Mr. Wren ($8,105), Mr. Hewitt ($14,245) and Mr. O’Brien ($3,674).

58 2018 Proxy Statement

EXECUTIVE COMPENSATION

Grants of Plan-Based Awards in 2017

The below table provides information about equity and non-equity awards granted to the named executive officers with respect to 2017.

	Estimated Possible Payouts Under Non-Equity Incentive Plan Awards(1)
Name of Executive	Threshold ($)		Target ($)		Maximum ($)
John Wren		$0	$	18,920,000	$	37,840,000
Philip Angelastro		$0	$	5,350,000	$	10,700,000
Dennis Hewitt		$0	$	800,000	$	1,600,000
Jonathan Nelson		$0	$	2,750,000	$	5,500,000
Michael O’Brien		$0	$	2,125,000	$	4,250,000

⁽¹⁾ These columns show the potential value of the payout for each named executive officer under our Incentive Award Plan at threshold, target and maximum levels. The potential payouts were performance-driven and therefore entirely at risk. The business measurements and performance criteria for determining the payout are described in the section entitled “Compensation Discussion and Analysis” on page 43. Awards paid for performance in 2017, which include both a short-term cash component and a long-term equity component that is also contingent upon future performance, are reflected in the Summary Compensation Table for 2017 on page 58.

Outstanding Equity Awards at 2017 Year-End

The following table provides information on the holdings of stock options and unvested stock awards by the named executive officers as of December 31, 2017. For additional information about the options awards and stock awards, see the description of equity incentive compensation in the section entitled “Compensation Discussion and Analysis” on page 43.

	Option Awards					Stock Awards
Name of Executive	Number of Securities Underlying Unexercised Options (#) Exercisable	Number of Securities Underlying Unexercised Options (#) Unexercisable	Option Exercise Price ($/shr)		Option Expiration Date	Number of Shares or Units of Stock That Have Not Vested (#)(1)	Market Value of Shares or Units of Stock That Have Not Vested ($)(2)		Equity Incentive Plan Awards: Number of Unearned Shares, Units or Other Rights That Have Not Vested (#)(3)	Equity Incentive Plan Awards: Market or Payout Value of Unearned Shares, Units or Other Rights that Have Not Vested ($)(2)
John Wren	—	—		—	—	—		—	385,158	$	28,051,057
Philip Angelastro	350,000	—	$	23.40	3/31/2019	—		—	103,729	$	7,554,583
Dennis Hewitt	—	—		—	—	13,290	$	967,911	—		—
Jonathan Nelson	—	—		—	—	36,367	$	2,648,609	—		—
Michael O’Brien	—	—		—	—	36,717	$	2,674,099	—		—

(1)

The vesting dates of stock awards disclosed in this column are as follows:

■Mr. Hewitt: 1,223 restricted stock units are scheduled to vest on each of April 15, 2018, 2019 and 2020. 1,080 restricted stock units are scheduled to vest on each of May 15, 2018, 2019 and 2020. 1,081 restricted stock units are scheduled to vest on May 15, 2021. 1,060 restricted stock units are scheduled to vest on each of March 15, 2018, 2019, 2020, 2021 and 2022. ■Mr. Nelson: 667 restricted stock units are scheduled to vest on July 15, 2018. 2,000 restricted stock units are scheduled to vest on July 15, 2018. 2,008 restricted stock units are scheduled to vest on April 15, 2019. 2,009 restricted stock units are scheduled to vest on each of April 15, 2018 and 2020. 2,592 restricted stock units are scheduled to vest on each of May 15, 2018, 2019 and 2020. 2,593 restricted stock units are scheduled to vest on May 15, 2021. 3,461 restricted stock units are scheduled to vest on each of March 15, 2018, 2019, 2020, 2021 and 2022. ■Mr. O’Brien: 2,703 restricted stock units are scheduled to vest on April 15, 2019. 2,704 restricted stock units are scheduled to vest on each of April 15, 2018 and 2020. 2,940 restricted stock units are scheduled to vest on each of May 15, 2018, 2019 and 2020. 2,941 restricted stock units are scheduled to vest on May 15, 2021. 3,369 restricted stock units are scheduled to vest on each of March 15, 2018, 2019, 2020, 2021 and 2022.

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EXECUTIVE COMPENSATION

(2)	The market value of stock awards are determined by multiplying the number of unvested shares by $72.83, the closing price of Omnicom common stock on December 29, 2017, the last trading day of the 2017 fiscal year.
(3)	The PRSUs are scheduled to vest at the times indicated below. The actual number of PRSUs that will vest depends on our relative average return on equity for the applicable three-year periods ending December 31, 2017, December 31, 2018, and December 31, 2019, compared to a pre-established peer group. For purposes of the table, we have assumed that the maximum level of performance will be achieved for each award.
	■Mr. Wren: 132,660 performance restricted stock units are scheduled to vest in calendar year 2018. 121,111 performance restricted stock units are scheduled to vest in calendar year 2019. 131,387 performance restricted stock units are scheduled to vest in calendar year 2020. ■Mr. Angelastro: 28,965 performance restricted stock units are scheduled to vest in calendar year 2018. 32,381 performance restricted stock units are scheduled to vest in calendar year 2019. 42,383 performance restricted stock units are scheduled to vest in calendar year 2020.

Option Exercises and Stock Vested in 2017

The following table provides information for the named executive officers on the number of shares acquired upon the vesting of stock awards in the form of restricted stock, RSUs or PRSUs and the value realized, each before payment of any applicable withholding tax and broker commissions. There were no stock option exercises in 2017.

	Stock Awards
Name of Executive	Number of Shares Acquired on PRSU Vesting (#)	Value Realized on PRSU Vesting ($)(1)		Number of Shares Acquired on RS/RSU Vesting (#)	Value Realized on RS/RSU Vesting ($)(1)
John Wren	96,830	$	8,051,415	—		—
Philip Angelastro	14,281	$	1,187,465	5,000	$	426,550
Dennis Hewitt	6,176	$	513,534	2,303	$	192,179
Jonathan Nelson	—		—	11,267	$	940,931
Michael O’Brien	9,302	$	773,461	5,643	$	470,257

⁽¹⁾ The reported dollar values are calculated by multiplying the number of shares subject to vesting by the closing price of Omnicom common stock on the vesting date.

Nonqualified Deferred Compensation in 2017

Certain of Omnicom’s employees were, in prior years, eligible to defer some or all of the shares of their restricted stock and RSUs that may vest in a given year. For additional information about the deferral plans pursuant to which these elections were made, see the description of deferred compensation in the section entitled “Compensation Discussion and Analysis” on page 43.

The table below provides information on the non-qualified deferred compensation of the named executive officers in 2017, which consisted only of the deferral of shares of restricted stock or RSUs under Omnicom’s Restricted Stock and Restricted Stock Unit Deferred Compensation Plans.

Name of Executive	Executive Contributions in Last FY ($)	Aggregate Earnings in Last FY ($)(1)	Aggregate Withdrawals/ Distribution in Last FY ($)	Aggregate Balance at Last FYE ($)
John Wren	—	($1,669,957)	—	$	9,904,152
Philip Angelastro	—	—	—		—
Dennis Hewitt	—	—	—		—
Jonathan Nelson	—	—	—		—
Michael O’Brien	—	—	—		—

⁽¹⁾ Reflects earnings or (losses) on deferred shares. Earnings on deferred shares are calculated based on the total number of deferred shares in the account as of December 31, 2017 multiplied by the Omnicom closing stock price as of December 29, 2017, the last trading day of the 2017 fiscal year, less the total number of such deferred shares multiplied by the Omnicom closing stock price as of December 31, 2016.

60 2018 Proxy Statement

EXECUTIVE COMPENSATION

Potential Payments upon Termination of Employment or Change in Control

The named executive officers may be entitled to payments upon termination of employment or in connection with a change in control of Omnicom. The table below sets forth the potential payments that each named executive officer may receive upon termination of employment or change in control of Omnicom under various scenarios as of December 31, 2017. Except for the arrangements described below, none of the named executive officers have entered into any plans, arrangements or agreements with Omnicom providing for payments upon termination of employment or change in control of Omnicom, other than payments generally available to all salaried employees that do not discriminate in scope, terms or operation in favor of the executive officers of Omnicom.

THE SERCR PLAN

Omnicom adopted the SERCR Plan in 2006, and Messrs. Wren and Angelastro participate. The SERCR Plan is unique in its structure and objectives. It is intended to provide security to Omnicom through the restrictive covenants described below while delivering a valuable benefit to executives in the form of post-termination compensation.

Restrictive Covenants and Consulting Obligation

In consideration for annual benefits under the SERCR Plan, participating executives are subject to restrictions on competition, solicitation, disparagement, and other willful actions that may materially harm Omnicom, from the date of termination of employment through the end of the calendar year in which they receive their last annual benefits payment. In addition, prior to age 55 the participating executives agree to serve as advisors or consultants to Omnicom during the post-employment period, subject to certain limitations.

Annual Benefits

The SERCR Plan provides annual benefits to participating executives upon their termination of employment after they render seven years of service to Omnicom or its subsidiaries, unless termination is for “Cause.” “Cause” is generally defined for this purpose as the executive having been convicted of (or having entered a plea bargain or settlement admitting guilt for) any felony committed in the execution of and while performing his duties as an executive officer, an act of fraud or embezzlement against Omnicom, as a result of which continued employment would have a material adverse impact on Omnicom, or having been the subject of any order, judicial or administrative, obtained or issued by the SEC, for any securities violation involving a material and willful act of fraud. Subject to compliance with the SERCR Plan’s restrictive covenants and consulting obligation, the annual benefit is payable for 15 years following termination, and is equal to the lesser of (a) the product of (i) the average of the executive’s three highest years of total pay (base salary plus bonus and other incentive compensation), and (ii) a percentage equal to 5% plus 2% for every year of the executive’s service as an executive officer to Omnicom, not to exceed 35% and (b) $1.5 million, subject to an annual cost-of-living adjustment of up to 2.5% per year beginning with the second annual payment. Payment of this annual benefit begins on the later of (a) attainment of age 55, or (b) the year following the calendar year in which the termination of employment occurred, with certain exceptions. In the event of death subsequent to satisfaction of the seven-year service requirement, beneficiaries of the executive are entitled to the annual benefit payments. Any future compensation arrangement under the SERCR Plan that would oblige Omnicom to make payments in the event of a named executive officer's death would require shareholder approval. No annual benefit is payable if the executive is terminated by Omnicom for Cause.

THE EXECUTIVE SALARY CONTINUATION PLAN AGREEMENT

Omnicom has entered into Executive Salary Continuation Plan Agreements with Messrs. Hewitt and Nelson pursuant to which Omnicom agreed to make annual payments for up to a maximum of 10 years after termination of full time employment, unless termination is for “Cause,” in consideration for their agreement to consult and subject to restrictions on competition, solicitation, disparagement, and other willful actions that may be harmful to Omnicom during the payment period. “Cause” is generally defined for this purpose as misconduct involving willful malfeasance, such as breach of trust, fraud or dishonesty. Based on Messrs. Hewitt’s and Nelson’s ages and years of service with Omnicom or its subsidiaries, as of December 31, 2017, their payment periods were ten years for Mr. Hewitt and eight years for Mr. Nelson.

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EXECUTIVE COMPENSATION

Annual Payments Under the Executive Salary Continuation Plan Agreement

Following termination and subject to compliance with the consulting obligation and restrictions on competition, solicitation, disparagement, and other willful actions that may be harmful to Omnicom, the participating executives are entitled to receive annual payments, beginning in the year described below, for the duration of the payment period. Annual payments are equal to 30% of the highest annual base salary paid to Mr. Hewitt within five years prior to termination and 50% of the highest annual base salary paid to Mr. Nelson within five years prior to termination. Annual payments are subject to there being sufficient pre-tax profits of Omnicom for the calendar year immediately prior to the year in which the participating executives are entitled to payment.

The participating executives are entitled to 100% of the annual payment amount in the event of disability. For a voluntary termination, including retirement, or a termination by Omnicom without Cause, Mr. Hewitt is entitled to 100% of the annual payment amount since he has completed more than 20 years of service and Mr. Nelson is entitled to 75% of the annual payment amount since he has completed fewer than 20 years of service. Mr. Nelson’s reduced entitlement is calculated by dividing the 15 years of service he completed as of December 31, 2017 by 20. In the event of death, beneficiaries of the participating executives are entitled to 75% of the annual payment amount. Any future compensation arrangement under an Executive Salary Continuation Plan Agreement that would oblige Omnicom to make payments in the event of a named executive officer's death would require shareholder approval. The participating executives are not entitled to any annual payment if they are terminated by Omnicom for Cause.

Consulting Obligation and Certain Restrictive Covenants

The participating executives agree to serve as advisors or consultants to Omnicom during the payment period, subject to certain limitations. In addition, they will be subject to restrictions on competition, solicitation, disparagement, and other willful actions that may be harmful to Omnicom, from the date of termination through the end of the payment period.

THE INCENTIVE AWARD PLAN

Each of the named executive officers participated in our Incentive Award Plan in fiscal year 2017. The Incentive Award Plan provides performance-based bonuses to participants, based upon specific performance criteria, discussed above in the section entitled “Compensation Discussion and Analysis” on page 43, during each performance period. If a participant in the Incentive Award Plan experiences a termination of employment for any reason prior to the end of a performance period or the bonus payment date for such performance period, he is not entitled to any payment, but the Compensation Committee has discretion (a) to determine whether the participant will receive any bonus, (b) to determine whether the participant will receive a pro-rated bonus reflecting that portion of the performance period in which the participant had been employed by Omnicom, and (c) to make such other arrangements as the Compensation Committee deems appropriate in connection with the participant’s termination of employment.

EXECUTIVE LIFE INSURANCE COVERAGE

Omnicom provides life insurance coverage to its employees. Certain of the named executive officers participate in company-sponsored executive life insurance program that provide them with a higher coverage amount than they would otherwise be eligible for as employees. This coverage is in lieu of the coverage provided to employees generally. Specifically, Messrs. Wren and O’Brien are provided with executive life insurance policies for which Omnicom pays the premiums. As of December 31, 2017, in the event of termination of employment due to death, these named executive officers' beneficiaries would each be entitled to a life insurance benefit in the amount of $1,000,000 paid by MassMutual. This amount is $250,000 higher than each would be eligible for under the program covering employees generally.

ACCELERATION OF EQUITY AWARDS

Messrs. Wren and Angelastro hold unvested PRSUs. Messrs. Hewitt, Nelson and O’Brien hold unvested RSUs that generally vest based on continued employment and the passage of time. As specified below, such named executive officers are entitled to accelerated vesting (a) on a pro rata basis upon termination of employment due to disability, and (b) upon death.

62 2018 Proxy Statement

EXECUTIVE COMPENSATION

No equity awards held by our named executive officers have single trigger or double trigger acceleration in connection with a change in control. However, if RSUs and PRSUs held by our named executive officers or other employees are not assumed or substituted by an acquirer in connection with a change in control of Omnicom, they fully vest.

If a named executive officer retires, voluntarily terminates or is terminated by Omnicom, with or without cause, all RSUs and PRSUs that have not yet vested are generally forfeited or, to the extent PRSUs are partially vested based on the passage of time, they may remain subject to vesting based on the ultimate achievement of the performance goals.

POTENTIAL PAYMENTS UPON TERMINATION OF EMPLOYMENT OR CHANGE IN CONTROL TABLE

The following table provides the potential payments that each named executive officer may receive upon termination of employment or change in control of Omnicom, assuming that (a) such termination or change in control of Omnicom occurred on December 31, 2017, and (b) the price per share of Omnicom common stock equals $72.83, the closing price at December 29, 2017, the last trading day of the 2017 fiscal year.

Name of Executive	Death			Disability			For Cause Termination	Termination without Cause			Retirement			Voluntary Termination			Change in Control(1)
John Wren
■SERCR Plan(2) ■PRSU Awards(3)	$	1,500,000		$	1,500,000		—	$	1,500,000		$	1,500,000		$	1,500,000		—
	$	9,319,327		$	6,129,883		—		—			—			—		—
Philip Angelastro
■SERCR Plan(4) ■PRSU Awards(3)	$	1,500,000		$	1,500,000		—	$	1,500,000		$	1,500,000		$	1,500,000		—
	$	2,843,866		$	1,815,069		—		—			—			—		—
Dennis Hewitt
■Executive Salary
Continuation Agreement ■RSU Awards(7)	$	88,875	(5)	$	118,500	(6)	—	$	118,500	(6)	$	118,500	(6)	$	118,500	(6)	—
	$	967,911		$	582,786		—		—			—			—		—
Jonathan Nelson
■Executive Salary
Continuation Agreement ■RSU Awards(7)	$	318,750	(8)	$	425,000	(9)	—	$	318,750	(10)	$	318,750	(10)	$	318,750	(10)	—
	$	2,648,609		$	1,362,722		—		—			—			—		—
Michael O’Brien
■RSU Awards(7)	$	2,674,099		$	1,586,529		—		—			—			—		—

(1)	The change in control value of equity awards assumes that all equity awards are assumed or substituted in connection with a change in control. There are not currently any outstanding equity awards that have single trigger or double trigger acceleration in connection with a change in control. If, however, an unvested equity award is not assumed or substituted in connection with a change in control, such unvested equity award vests in full.
(2)	Except in the event of a termination for Cause, Mr. Wren or his beneficiary, as the case may be, would be entitled to receive fifteen annual payments in this amount, the first of which would be payable in 2018. In the event of termination for Cause, no payments would be made. The amount reported is the payment cap set forth in the SERCR Plan as in effect on December 31, 2017, such amount being subject to an annual cost-of-living adjustment of up to 2.5% per year beginning with the second annual payment. All payment obligations are conditioned upon compliance with the restrictive covenants described above.
(3)	The value of PRSUs was determined by taking the aggregate fair market value of the shares underlying PRSUs subject to accelerated vesting as of December 31, 2017. The value of PRSUs assumes achievement of the highest performance target and therefore the actual value could be lower than the amount disclosed. Amounts shown do not include unvested PRSUs which are considered earned and non-forfeitable as of December 31, 2017 because the service requirement was met, but which are scheduled to vest following the end of the applicable performance period and based on the applicable level of actual performance during such period. For additional information, please read the discussion above in our “Compensation Discussion and Analysis.”

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EXECUTIVE COMPENSATION

(4)	Except in the event of termination due to death or disability or a termination for Cause, Mr. Angelastro would be entitled to receive fifteen annual payments in this amount, the first of which would be payable in 2019 upon Mr. Angelastro turning 55. In the event of termination due to death or disability, Mr. Angelastro or his beneficiary, as the case may be, would be entitled to receive fifteen annual payments in this amount, the first of which would be payable in 2018. In the event of termination for Cause, no payments would be made. The amount reported is the payment cap set forth in the SERCR Plan as in effect on December 31, 2017, such amount being subject to an annual cost-of-living adjustment of up to 2.5% per year beginning with the second annual payment. All payment obligations are conditioned upon compliance with the restrictive covenants and consulting obligation described above.
(5)	This reflects 75% of Mr. Hewitt’s $118,500 annual payment, payable to his designated beneficiary. Ten annual payments in this amount would be paid to such beneficiary, with the first payment being made in 2018.
(6)	This reflects 30% of the highest annual rate of salary paid to Mr. Hewitt in the five years preceding December 31, 2017. Ten annual payments would be made in this amount, with the first payment being made in 2019. All payment obligations are conditioned upon compliance with the consulting obligation and restrictive covenants described above.
(7)	The value of RSUs was determined by taking the aggregate fair market value of the shares underlying RSUs subject to accelerated vesting as of December 31, 2017. For additional information, please read the discussion above in our “Compensation Discussion and Analysis.”
(8)	This reflects 75% of Mr. Nelson’s $425,000 annual payment, payable to his designated beneficiary. Eight annual payments in this amount would be paid to such beneficiary, with the first payment being made in 2018.
(9)	This reflects 50% of the highest annual rate of salary paid to Mr. Nelson in the five years preceding December 31, 2017. Eight annual payments would be made in this amount, with the first payment being made in 2019. All payment obligations are conditioned upon compliance with the consulting obligation and restrictive covenants described above.
(10)	This reflects 75% of Mr. Nelson’s $425,000 annual payment and has been reduced as described above because Mr. Nelson has not yet completed 20 years of service. Eight annual payments would be made in this amount, with the first payment being made in 2019. All payment obligations are conditioned upon compliance with the consulting obligation and restrictive covenants described above.

Pay Ratio Disclosure

As required by Section 953(b) of the Dodd-Frank Wall Street Reform and Consumer Protection Act, and Item 402(u) of Regulation S-K, we are providing the following information regarding the relationship of the annual total compensation of our employees and the annual total compensation of our CEO. We consider the pay ratio specified below to be a reasonable estimate, calculated in a manner intended to be consistent with Item 402(u) of Regulation S-K.

We identified the median employee by considering all individuals who were employed by us on October 31, 2017, whether employed on a full-time or part-time basis, excluding our CEO and employees located in jurisdictions with a de minimis number of employees. As of October 31, 2017, we determined that our employee population consisted of a total of 99,296 U.S. and non-U.S. individuals, whether employed on a full-time or part-time basis. Pursuant to the de minimis exception allowed under Item 402(u), we excluded all 4,944 individuals who provided services to us in Colombia (1,375), Egypt (192), Indonesia (192), Malaysia (765), Mexico (1,211), Thailand (1,060) and Ukraine (149).

We identified the median employee by examining all gross base salaries during the month of October 2017 for the remaining employee population, as of October 31, 2017, of 94,352 individuals. Unlike our 2017 10-K, the size of our total employee population for purposes of this pay ratio calculation is based on a count of individuals employed as of October 31, 2017, and as required by Item 402(u) of Regulation S-K, our part-time employees have not been converted to full-time equivalent employees. For employees paid other than in U.S. dollars, we converted their compensation to U.S. dollars using foreign exchange rates in effect on October 31, 2017. Using this methodology, we determined that our median employee was a full-time employee located in Chile. We believe our methodology represents a consistently applied compensation measure that appropriately identifies our median employee.

After identifying the median employee, we calculated the annual total compensation for 2017 for such employee using the same methodology we used for our NEOs as set forth in the Summary Compensation Table for 2017 earlier in this section. Because the median employee was paid other than in U.S. dollars, we converted the median employee's compensation to U.S. dollars using the foreign exchange rate in effect on December 31, 2017.

For 2017, the value of the annual total compensation of the median employee was $40,230.30. For 2017, the annual total compensation of our CEO was $23,959,325. The resulting pay ratio of the annual total compensation of our CEO to the median of the annual total compensation of all of our employees (other than our CEO) for 2017 was approximately 596 to 1.

64 2018 Proxy Statement

ITEM 3 — RATIFICATION OF THE
APPOINTMENT OF INDEPENDENT AUDITORS

The Audit Committee is directly responsible for the appointment, compensation, retention and oversight of the independent registered public accounting firm retained to audit the Company's financial statements. In accordance with the Audit Committee’s charter, the Audit Committee has appointed KPMG LLP as our independent auditors for our fiscal year ending December 31, 2018. We are submitting the selection of our independent auditors for shareholder ratification at the 2018 Annual Meeting. KPMG LLP has been retained as our independent auditor continuously since June 2002. The members of the Audit Committee and the Board believe that the continued retention of KPMG LLP to serve as our independent registered public accounting firm is in the best interests of the Company and its shareholders.

Representatives of KPMG LLP are expected to be present at the 2018 Annual Meeting, will have the opportunity to make a statement if they desire to do so and are expected to be available to respond to appropriate questions.

The Audit Committee is not bound by the results of the vote regarding ratification of the independent auditors. If our shareholders do not ratify the selection, the Audit Committee will reconsider whether to retain KPMG LLP, but still may retain them. Even if the selection is ratified, the Audit Committee, in its discretion, may change the appointment at any time during the year if it determines that such a change would be in the best interests of Omnicom and its shareholders.

The Board UNANIMOUSLY recommends that shareholders vote FOR ratification of the appointment of
KPMG LLP as our independent auditors.

Approval of this item requires the favorable vote of the holders of a majority of the shares voting on the item. Abstentions and broker non-votes will have no effect on the outcome of this item.

Fees Paid to Independent Auditors

The following table shows information about fees billed by KPMG LLP and affiliates for professional services, as well as all “out-of-pocket” costs incurred in connection with these services, rendered for the last two fiscal years:

	2017		Approved by Audit Committee		2016		Approved by Audit Committee
Audit Fees(1)	$	22,124,000	100	%	$	21,103,000	100	%
Audit-Related Fees(2)	$	363,560	100	%	$	843,000	100	%
Tax Fees(3)	$	390,900	100	%	$	609,000	100	%
All Other Fees(4)		—				—
Total Fees	$	22,878,460			$	22,555,000

(1)	Audit Fees consist of fees for professional services for the audit and interim reviews of our consolidated financial statements and for the audit of our internal control over financial reporting. Audit fees also include audit services that are normally provided by independent auditors in connection with statutory audit and regulatory filings. The amounts noted above include reimbursement for direct out-of-pocket travel and other sundry expenses.
(2)	Audit-Related Fees consist of fees for assurance and audit related services performed for the Company or its subsidiaries but not directly related to the audits. Audit-Related fees include due diligence services and attestation or agreed upon procedures related to certain statutory requirements or local reporting requirements.
(3)	Tax Fees consist primarily of fees for routine international tax compliance and advisory services, including the review and preparation of statutory tax returns, related compliance services, and routine tax advice.
(4)	All Other Fees consist of fees for permitted services other than those that meet the criteria above. There were no such services performed in 2017 or 2016.

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ITEM 3 — RATIFICATION OF THE APPOINTMENT OF INDEPENDENT AUDITORS

In deciding to reappoint KPMG LLP to be our independent auditors for 2018, the Audit Committee considered KPMG LLP’s provision of services to assure that it was compatible with maintaining KPMG LLP’s independence. The Audit Committee determined that these fees were compatible with the independence of KPMG LLP as our independent auditors.

The Audit Committee has adopted a policy that requires it to pre-approve each audit and permissible non-audit service rendered by KPMG LLP except for items exempt from pre-approval requirements by applicable law. On a quarterly basis, the Audit Committee reviews and generally pre-approves specific types of services and the range of fees that may be provided by KPMG LLP without first obtaining specific pre-approval from the Audit Committee. The policy requires the specific pre-approval of all other permitted services and all other permitted services were pre-approved in 2017.

Audit Committee Report

The Audit Committee’s primary purpose is to assist the Board in carrying out its oversight responsibilities relating to Omnicom’s financial reporting. Management is responsible for the preparation, presentation and integrity of Omnicom’s financial statements, accounting and financial reporting principles and the establishment and effectiveness of internal controls and procedures designed to ensure compliance with accounting standards and applicable laws and regulations. The independent auditors are responsible for performing an independent audit of the financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States), expressing an opinion as to the conformity of such financial statements with generally accepted accounting principles in the United States and auditing the operating effectiveness of internal control over financial reporting. The independent auditors have free access to the Audit Committee to discuss any matters they deem appropriate.

In performing its oversight role, the Audit Committee has reviewed and discussed with management Omnicom’s audited 2017 financial statements as of December 31, 2017. The Audit Committee has also discussed with KPMG LLP the matters required to be discussed under all relevant professional and regulatory standards, which included discussion of the quality of Omnicom’s accounting principles, the reasonableness of significant judgments and the clarity of disclosures in the financial statements. The Audit Committee has received and reviewed the written disclosures and the letter from KPMG LLP required under all relevant professional and regulatory standards, and has discussed with KPMG LLP its independence.

Based on the review and discussions referred to in this Report, the Audit Committee recommended to the Board that the audited financial statements of Omnicom for the year ended December 31, 2017 be included in its 2017 10-K.

Members of the Audit Committee
Mary C. Choksi
Robert Charles Clark
Deborah J. Kissire
Gracia C. Martore
John R. Murphy
Valerie M. Williams

66 2018 Proxy Statement

ITEM 4 – SHAREHOLDER PROPOSAL REGARDING
THE OWNERSHIP THRESHOLD FOR CALLING
SPECIAL SHAREHOLDER MEETINGS

John Chevedden, 2215 Nelson Avenue, No. 205, Redondo Beach, CA 90278, has advised that he is the beneficial owner of no less than 100 shares of Omnicom common stock and that he intends to introduce a proposal for the consideration of shareholders at the 2018 Annual Meeting, the text of which reads as follows.

Proposal 4 — Special Shareholder Meeting Improvement

Resolved, Shareowners ask our board to take the steps necessary (unilaterally if possible) to amend our bylaws and each appropriate governing document to give holders in the aggregate of 10% of our outstanding common stock the power to call a special shareowner meeting (or the closest percentage to 10% according to state law). This proposal does not impact our board's current power to call a special meeting.

Special meetings allow shareowners to vote on important matters, such as electing new directors that can arise between annual meetings. This proposal topic won more than 70%-support at Edwards Lifesciences and SunEdison in 2013.

Omnicom shareholders currently do not have the full right to call a special meeting that is available under New York law. A shareholder ability to call a special meeting would put shareholders in a better position to ask for improvement in our board of directors after the 2018 annual meeting.

For instance, 8 directors had long-tenure of 15 to 31 years. Long-tenure can impair the independence of a director no matter how well qualified. This independence deficit has snowballed since directors with long-tenure controlled 100% of our Nomination Committee and 60% of our Executive Pay Committee. Independence is a priceless attribute in a director.

Our Lead Director had 24-years long tenure and received the highest negative vote of any Omnicom director. A proposal for an independent Board Chairman received 54%-support during the tenure of our current non-independent Chairman, Bruce Crawford with 28-years long-tenure.

Please vote to increase management accountability to shareholders:
Special Shareholder Meeting Improvement - Proposal 4

THE BOARD’S STATEMENT IN OPPOSITION

After carefully considering this shareholder proposal to reduce the threshold needed to call a special meeting, the Board of Directors has determined that the action requested by the proposal is neither necessary, nor is it in the best interests of Omnicom or its shareholders. Accordingly, the Board UNANIMOUSLY recommends a vote AGAINST this proposal for the following reasons:

■Current By-laws already permit shareholders who own at least 25% or more of outstanding shares to call a special meeting;

■Current threshold prevents the potential for unnecessary use of corporate resources, or disruption associated with a lower threshold;

■Shareholders have the ability to engage with management and the Board throughout the year and all feedback is carefully considered; and

■Shareholder rights are further protected by Omnicom’s strong governance practices.

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ITEM 4 – SHAREHOLDER PROPOSAL REGARDING THE OWNERSHIP THRESHOLD FOR CALLING SPECIAL SHAREHOLDER MEETINGS

Omnicom shareholders already have the right to call a special meeting at a threshold that is consistent with market standard practice.

At our 2012 Annual Meeting, after careful consideration and shareholder feedback, the Board put forth a management proposal to amend its By-laws to allow for special meeting rights, which was overwhelmingly approved by more than 99% of votes cast. While the Board has long understood the importance of this right and advocated for adoption, it also believes in affording shareholders other opportunities to engage with management and the Board, both in and outside of the annual meeting process. For more details on our Board’s shareholder engagement initiatives in 2017, please reference page 7 of our Proxy Summary.

In evaluating this shareholder proposal, the Board also wanted to understand the prevalence of its special meeting threshold relative to other S&P 500 companies. Research findings revealed that a 25% special meeting ownership threshold is the overwhelming market practice. Within the S&P 500, 300 companies afford shareholders the right to call a special meeting. Of those companies, 40% have set the ownership threshold for allowing shareholders to call a special meeting at 25%, while only 16% have adopted a 10% ownership threshold.

A 25% ownership threshold provides a procedural safeguard against abuse, corporate waste or disruption associated with a lower threshold.

For Omnicom, a 25% threshold strikes the appropriate balance between ensuring that shareholders have the ability to call a special meeting to act on extraordinary and urgent matters, while at the same time protecting against a misuse of this right by a small number of shareholders whose interests may not be aligned with the majority of shareholders. The current threshold also prevents the unnecessary waste of corporate resources, as convening a special meeting imposes significant administrative and operational costs. As a result, special meetings should be limited to circumstances where a substantial number of shareholders believe a matter is sufficiently urgent or extraordinary to justify calling a special meeting.

Based on our current shareholder base, our four largest shareholders could act together to call a special meeting. Any of those shareholders could also satisfy the 25% ownership threshold by partnering with other large shareholders to call a special meeting with more advocates. If shareholders holding just 10% of the combined voting power of our outstanding capital stock had the ability to call a special meeting, then just two of our top four shareholders would be able to act collectively and call a special meeting. This could lead to disproportionate influence over our business by a small number of shareholders.

We are committed to strong and effective corporate governance policies and provide sufficient avenues for shareholders to meaningfully engage in Company affairs.

Our existing governance policies provide shareholders with numerous avenues to address and discuss our business and governance policies with the Board, all of which demonstrate the Company’s responsiveness and willingness to engage with shareholders and provide them with a meaningful voice. Such avenues include the ability to:

■nominate new candidates to the Board through both proxy access and the traditional nomination process;

■elect directors annually by majority vote;

■submit proposals for inclusion in our proxy statement for consideration at an annual meeting; and

■call a special meeting of the Board.

In addition, we strive to maintain an open dialogue with our shareholders and believe investor input enables the Board to more effectively evaluate our governance practices. During 2017, we reached out to more than 70% of our shareholders and we spoke to every shareholder who accepted our invitation to talk. During these conversations, not one shareholder objected to our current By-law or asked that we lower the threshold. As we have demonstrated over the years, shareholder feedback is greatly valued and is an important element of our Board’s decision-making process. We look forward to continued dialogue with our shareholders and encourage candid feedback and input. For more details on how to engage with our Board, please reference page 25 of this Proxy Statement.

The Board of Directors UNANIMOUSLY recommends that shareholders vote AGAINST this proposal.

Approval of this proposal requires the favorable vote of the holders of a majority of the shares voting on the proposal. Abstentions and broker non-votes will have no effect on the outcome of this proposal.

68 2018 Proxy Statement

STOCK OWNERSHIP INFORMATION

Beneficial Ownership of Certain Beneficial Owners and Management

The following table sets forth certain information as of the close of business on April 2, 2018 (except as otherwise noted), with respect to the beneficial ownership of our common stock by:

■each person known by Omnicom to own beneficially more than 5% of our outstanding common stock;

■each current director or nominee;

■each named executive officer; and

■all directors and executive officers as a group.

The amounts and percentages of shares beneficially owned are reported on the basis of SEC regulations governing the determination of beneficial ownership of securities. Under SEC rules, a person is deemed to be a “beneficial owner” of a security if that person has or shares voting power or investment power, which includes the power to dispose of or to direct the disposition of such security. A person is also deemed to be a beneficial owner of any securities of which that person has a right to acquire beneficial ownership within 60 days. Securities that can be so acquired are deemed to be outstanding for purposes of computing such person’s ownership percentage, but not for purposes of computing any other person’s percentage. Under these rules, more than one person may be deemed to be a beneficial owner of the same securities and a person may be deemed to be a beneficial owner of securities as to which such person has no economic interest. Unless otherwise indicated, the address for each individual listed below is c/o Omnicom Group Inc., 437 Madison Avenue, New York, New York 10022.

Name	Number of Shares Owned(1)	Options Exercisable within 60 Days	Total Beneficial Ownership	Percent of Shares Outstanding(2)
Massachusetts Financial Services Company(3)	17,567,221	—	17,567,221	7.7	%
The Vanguard Group(4)	16,769,334	—	16,769,334	7.3	%
First Eagle Investment Management, LLC(5)	15,518,340	—	15,518,340	6.8	%
BlackRock, Inc.(6)	15,333,319	—	15,333,319	6.7	%
Philip Angelastro(7)	275,346	350,000	625,346	*
Alan R. Batkin	24,995	—	24,995	*
Mary C. Choksi	19,118	—	19,118	*
Robert Charles Clark(8)	37,955	—	37,955	*
Leonard Coleman, Jr.	27,238	—	27,238	*
Bruce Crawford	105,250	—	105,250	*
Susan S. Denison	38,153	—	38,153	*
Ronnie S. Hawkins	748	—	748	*
Dennis Hewitt(9)	47,333	—	47,333	*
Deborah J. Kissire	4,109	—	4,109	*
Gracia C. Martore	3,111	—	3,111	*
John R. Murphy	59,388	—	59,388	*
Jonathan Nelson(10)	75,175	—	75,175	*
Michael O’Brien(11)	91,804	—	91,804	*
John R. Purcell(12)	39,959	—	39,959	*
Linda Johnson Rice	8,399	—	8,399	*

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STOCK OWNERSHIP INFORMATION

Name	Number of Shares Owned(1)	Options Exercisable within 60 Days	Total Beneficial Ownership	Percent of Shares Outstanding(2)
Valerie M. Williams	3,111	—	3,111	*
John Wren(13)	1,523,246	—	1,523,246	*
All directors and executive officers as a group (21 persons)(14)	2,455,509	350,000	2,805,509	1.2	%

*	less than 1%.
(1)	This column lists voting securities, and securities the payout of which has been deferred at the election of the holder, including restricted stock held by executive officers. Except to the extent noted below, each director or executive officer has sole voting and investment power with respect to the shares reported. The amounts in the column include:
	■shares held pursuant to the outside director equity plan, the payout of which has been deferred at the election of the holder, namely, Mr. Batkin — 23,309 shares, Ms. Choksi — 19,118 shares, Mr. Clark — 34,900 shares, Mr. Coleman — 16,227 shares, Ms. Denison — 36,594, Mr. Hawkins — 748 shares, Ms. Kissire — 4,109, Ms. Martore — 3,111 shares, Mr. Murphy — 39,443 shares, Mr. Purcell — 34,900 shares, Ms. Johnson Rice — 7,900 shares, and Ms. Williams — 3,111 shares; ■shares previously held under restricted stock awards, the payout of which has been deferred at the election of the holder, namely Mr. Wren — 135,990 shares; and ■shares credited under the Omnicom Group Retirement Savings Plan, namely, Mr. Angelastro — 1,328 shares, and Mr. Wren — 27,144 shares.
(2)	The number of shares of common stock outstanding on April 2, 2018 was 227,292,965. The percent of common stock is based on such number of shares and is rounded off to the nearest one-tenth of a percent.
(3)	Stock ownership is as of December 31, 2017 and is based solely on a Schedule 13G/A filed with the SEC on February 9, 2018, by Massachusetts Financial Services Company (“MFS”). In the filing, MFS reported having sole voting power over 15,963,816 shares and sole dispositive power over 17,567,221 shares. MFS has certified in its Schedule 13G that our stock was acquired and is held in the ordinary course of business, and was not acquired and is not held for the purpose of changing or influencing control of Omnicom. The address of MFS is 111 Huntington Avenue, Boston, MA 02199.
(4)	Stock ownership is as of December 31, 2017, and is based solely on a Schedule 13G/A filed with the SEC on February 9, 2018, by The Vanguard Group (“Vanguard”). In the filing, Vanguard reported having sole voting power over 329,188 shares, shared voting power over 56,353 shares, sole dispositive power over 16,392,647 shares and shared dispositive power over 376,687 shares. Vanguard has certified in its Schedule 13G that our stock was acquired and is held in the ordinary course of business, and was not acquired and is not held for the purpose of changing or influencing control of Omnicom. The address of Vanguard is 100 Vanguard Blvd., Malvern, PA 19355.
(5)	Stock ownership is as of December 31, 2017, and is based solely on a Schedule 13G/A filed with the SEC on February 8, 2018, by First Eagle Investment Management, LLC (“First Eagle”). In the filing, First Eagle reported having sole voting power over 14,750,095 shares and sole dispositive power over 15,518,340 shares. First Eagle has certified in its Schedule 13G that our stock was acquired and is held in the ordinary course of business, and was not acquired and is not held for the purpose of changing or influencing control of Omnicom. The address of First Eagle is 1345 Avenue of the Americas, New York, NY 10105.
(6)	Stock ownership is as of December 31, 2017, and is based solely on a Schedule 13G/A filed with the SEC on January 29, 2018, by BlackRock, Inc. (“BlackRock”). In the filing, BlackRock reported having sole voting power over 13,355,871 shares and sole dispositive power over 15,333,319 shares. BlackRock has certified in its Schedule 13G that our stock was acquired and is held in the ordinary course of business, and was not acquired and is not held for the purpose of changing or influencing control of Omnicom. The address of BlackRock is 55 East 52nd Street, New York, NY 10055.
(7)	Includes 147,136 PRSUs granted to Mr. Angelastro pursuant to our 2013 Plan.
(8)	Includes 1,700 shares that are held in a joint account shared by Mr. Clark and his wife.
(9)	Includes 18,335 RSUs granted to Mr. Hewitt pursuant to our 2013 Plan.
(10)	Includes 58,271 RSUs granted to Mr. Nelson pursuant to our 2013 Plan.
(11)	Includes 51,388 RSUs granted to Mr. O’Brien pursuant to our 2013 Plan.
(12)	Includes 4,000 shares that are held by Mr. Purcell’s wife. Mr. Purcell disclaims beneficial ownership of shares held by his wife.
(13)	Includes 524,333 PRSUs granted to Mr. Wren pursuant to our 2013 Plan.
(14)	Includes 1,700 shares over which there are shared voting and investment power.

70 2018 Proxy Statement

STOCK OWNERSHIP INFORMATION

Equity Compensation Plans

Our principal equity plan for employees is our 2013 Plan, which was approved by shareholders at our 2013 Annual Meeting of Shareholders and replaced all of our prior equity incentive plans. The Compensation Committee’s independent compensation consultant, Cook & Co., provided analysis and input on the 2013 Plan. As a result of the adoption of the 2013 Plan, no new awards may be made under any of Omnicom’s prior equity plans. Outstanding equity awards under prior plans, however, were not affected by the adoption of our 2013 Plan.

The purpose of the 2013 Plan is to promote the success and enhance the value of Omnicom by continuing to link the personal interest of participants to those of Omnicom shareholders and by providing participants with an incentive for outstanding performance to generate superior returns to Omnicom shareholders. The 2013 Plan provides for the grant of stock options (both incentive stock options and nonqualified stock options), restricted stock, stock appreciation rights, performance shares, performance stock units, dividend equivalents, stock payments, deferred stock, and restricted stock units.

Persons eligible to participate in the 2013 Plan include all employees and consultants of Omnicom and its subsidiaries, members of our Board or, as applicable, members of the board of directors of a subsidiary, as determined by the committee administering the 2013 Plan (the “IAP Committee”). The IAP Committee is appointed by our Board, and currently is comprised of the members of our Compensation Committee. With respect to awards to independent directors, Omnicom’s Board administers the 2013 Plan.

All of our current equity compensation plans have been approved by shareholders. The following table provides information about our current equity compensation plans as of December 31, 2017.

Plan Category	Number of securities to be issued upon exercise of outstanding options, warrants and rights (#)	Weighted-average exercise price of outstanding options, warrants and rights ($/shr)		Number of securities remaining available for future issuance (#)
Equity compensation plans approved by security holders: 2013 Incentive Award Plan and previously adopted equity incentive plans (other than our ESPP)	1,593,422	$	63.11	28,684,234	(1)
Equity compensation plans approved by security holders: ESPP Shares	—		—	8,766,437	(2)
Equity compensation plans not approved by security holders	—		—	—
Total	1,593,422	$	63.11	37,450,671

(1)

The maximum number of shares that may be issued under our 2013 Plan pursuant to awards granted after December 31, 2012 is 33,040,000. This number is subject to upward adjustment since awards granted under previously adopted plans (“Prior Plans”) that are forfeited or expire may be used again under the 2013 Plan. Any share of common stock that is subject to an option or stock appreciation right granted from our 2013 Plan is counted against this limit as one share of common stock for every one share of common stock granted. Any share of common stock that is subject to an award other than an option or stock appreciation right granted from the 2013 Plan is counted against this limit as 3.5 shares of common stock for every one share of common stock granted. The figure above includes 28,684,234 shares that may be issued under our 2013 Plan, which assumes that all securities available for future issuance are subject to options or stock appreciation rights. If all securities available for future issuance were subject to awards other than options or stock appreciation rights, this figure would be 8,195,495. Our 2013 Plan provides that we may no longer grant any awards under our Prior Plans. As of December 31, 2017, there were 1,593,422 stock options outstanding under our equity compensation plans (other than our ESPP) with a weighted-average exercise price of $63.11 and a weighted-average term of 3.89 years and 3,348,260 unvested full value shares outstanding under our equity compensation plans (other than our ESPP).

(2)

The ESPP is a tax-qualified plan in which all eligible full-time and part-time domestic employees may participate.

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STOCK OWNERSHIP INFORMATION

Section 16(a) Beneficial Ownership Reporting Compliance

Section 16(a) of the Exchange Act requires our directors and executive officers, and persons who own more than 10% of our common stock, to file reports of ownership and changes in ownership of our common stock with the SEC. Purchases and sales of our common stock by such persons are published on our website at http://www.omnicomgroup.com.

Based solely upon a review of the copies of such reports filed with the SEC, and on written representations from our reporting persons, we believe that all Section 16(a) filing requirements applicable to our executive officers, directors and persons who own more than 10% of our common stock were complied with during 2017.

72 2018 Proxy Statement

INFORMATION ABOUT VOTING AND THE MEETING

Record Date Shares Outstanding

Holders of our common stock, par value $0.15 per share, as of the close of business on April 2, 2018, will be entitled to vote their shares at the 2018 Annual Meeting. On that date, there were 227,292,965 shares of our common stock outstanding, each of which is entitled to one vote for each matter to be voted on at the 2018 Annual Meeting.

Quorum; Required Vote; Effect of an Abstention and Broker Non-Votes

More than 50% of the shares entitled to vote will constitute a quorum for the transaction of business at the 2018 Annual Meeting. Abstentions and broker non-votes will be counted for purposes of determining whether a quorum exists. Broker non-votes are proxies returned by brokers or other nominees who do not vote on a particular item because they did not receive instruction from the beneficial owner and were not permitted to exercise discretionary voting authority. If a quorum is not present, the shareholders who are present or represented may adjourn the meeting until a quorum exists. The time and place of the adjourned meeting will be announced at the time the adjournment is taken, and no other notice need be given. We will, however, publish a press release if the meeting is adjourned to another date. An adjournment will have no effect on business that may have already been conducted at the meeting.

In order to obtain approval of the election of any nominee as a director when the number of nominees equals the number of directors to be elected, assuming a quorum exists, a director nominee must receive a majority of the votes cast with respect to such nominee, meaning the number of shares voted “for” a director nominee must exceed the number of votes cast “against” that nominee. Abstentions and broker non-votes will not be considered as votes cast and will have no effect on the election of directors. In order to approve, on an advisory basis, the resolution on the Company’s executive compensation, ratify the appointment of KPMG LLP as our independent auditors, and approve the shareholder proposal described in the Proxy Statement, assuming a quorum exists, the affirmative vote of the holders of a majority of the shares represented at the meeting and actually voting on the item is required. Abstentions and broker non-votes will not be considered as voting on the items, and thus will have no effect on the outcome of Items 2, 3 and 4.

Voting

You can vote your shares by proxy card, through the Internet, by telephone or in person. Votes submitted through the Internet or by telephone must be received by 11:59 p.m. Eastern Daylight Time on Monday, May 21, 2018. We have adopted the Internet and telephone voting procedures to authenticate shareholders’ identities, to allow shareholders to provide their voting instructions and to confirm that their instructions have been recorded properly. By submitting your proxy through the Internet, by telephone or by using the proxy card, you will authorize two of our officers or their designees to represent you and vote your shares at the meeting in accordance with your instructions or, if no instructions are given, your shares will be voted as described below in the section entitled “Default Voting.”

Fidelity Management Trust Company, as trustee under our retirement savings plan, and Computershare Trust Company, Inc., as administrator of our ESPP, will vote common stock held in the plans as indicated by participants in whose accounts the shares are held, whether or not vested, on their proxies. Please note that your shares held in either plan will be voted as you instruct if your proxy card, telephone or Internet voting instructions are received on or before 11:59 p.m. Eastern Daylight Time on Thursday, May 17, 2018. In accordance with the terms of the retirement savings plan, Fidelity Management Trust Company will vote all shares for which it does not receive voting instructions by the deadline provided above in the same proportion on each issue as it votes the shares for which it does receive instructions. In accordance with the terms of the ESPP, Computershare Trust Company, Inc. will not vote shares for which it does not receive voting instructions by the deadline provided above.

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INFORMATION ABOUT VOTING AND THE MEETING

Voting by Street Name Holders

If you are the beneficial owner of shares held in “street name” by a broker, bank or other nominee, the broker, bank or other nominee, as the record holder of the shares, is required to vote those shares according to your instructions. Your broker, bank or other nominee should have sent you a voting instruction card for you to use in directing it on how to vote your shares.

Under existing rules, if your broker holds your shares in its name and you have not given voting instructions, your broker nonetheless has the discretion to authorize the designated proxies to act, except on certain matters. As such, they could vote in respect of the ratification of the appointment of KPMG LLP as our independent auditors, but not on the election of directors, the advisory resolution to approve executive compensation or the shareholder proposal.

“Default” Voting

If you submit a proxy, whether through the Internet, by telephone or by using the proxy card, but do not indicate any voting instructions, your shares will be voted “for” the election of all nominees for director, “for” the advisory resolution to approve the Company's executive compensation, “for” the ratification of the appointment of KPMG LLP, and “against” the shareholder proposal. If any other business properly comes before the shareholders for a vote at the meeting, your shares will be voted according to the discretion of the holders of the proxy. They may also vote your shares to adjourn the meeting and will be authorized to vote your shares at any adjournments or postponements of the meeting.

Right to Revoke

If you submit your proxy, you may change your voting instructions at any time prior to the vote at the 2018 Annual Meeting. For shares held directly in your name, you may change your vote by granting a new proxy, through the Internet, by telephone or in writing, which bears a later date (thereby automatically revoking the earlier proxy) or by attending the 2018 Annual Meeting and voting in person. For shares beneficially owned by you, but held in “street name” by a broker, bank or other nominee, please refer to the information forwarded to you by your broker, bank or other nominee for instructions on revoking or changing your proxy.

Tabulation of Votes

Equiniti Trust Company will act as inspectors at the 2018 Annual Meeting. They will determine the presence of a quorum and will tabulate and certify the votes.

74 2018 Proxy Statement

ADDITIONAL INFORMATION

Expense of Solicitation

We will bear all costs of this proxy solicitation. Proxies may be solicited by mail, in person, by telephone or by facsimile or electronic transmission by our officers, directors, and regular employees. We may reimburse brokerage firms, banks, custodians, nominees and fiduciaries for their expenses to forward proxy materials to beneficial owners. We have retained Morrow Sodali LLC, 470 West Avenue, Stamford, CT 06902 to assist in the solicitation of proxies. For these services, we will pay Morrow Sodali a fee of approximately $10,500 and reimburse it for certain out-of-pocket disbursements and expenses.

Incorporation by Reference

To the extent that this Proxy Statement is incorporated by reference into any other filing by Omnicom under the Securities Act of 1933 or the Exchange Act, the sections of this Proxy Statement entitled “Compensation Committee Report” and “Audit Committee Report” (to the extent permitted by the rules of the SEC) will not be deemed incorporated, unless specifically provided otherwise in such filing.

Availability of Certain Documents

In accordance with the rules promulgated by the SEC, we have elected to provide access to our proxy materials on the Internet. This Proxy Statement and our 2017 Annual Report to Shareholders are available, beginning April 12, 2018, on our website at http://investor.omnicomgroup.com. You may also access our Proxy Statement and our 2017 Annual Report to Shareholders at https://materials.proxyvote.com/681919. You also may obtain a copy of this document, our 2017 Annual Report to Shareholders, our Corporate Governance Guidelines, our Code of Business Conduct, our Code of Ethics for Senior Financial Officers and the charters for our Audit, Compensation, Governance and Finance Committees, without charge, by writing to: Omnicom Group Inc., 437 Madison Avenue, New York, New York 10022, Attn: Corporate Secretary. All of these documents also are available after being approved by the Board through our website at http://www.omnicomgroup.com. Please note that the information contained on our website is not incorporated by reference in, or considered to be part of, this Proxy Statement.

Delivery of Documents to Shareholders Sharing an Address

If you are the beneficial owner of shares of our common stock held in “street name” by a broker, bank or other nominee, your broker, bank or other nominee may only deliver one copy of this Proxy Statement and our 2017 Annual Report to Shareholders to multiple shareholders who share an address unless that broker, bank or other nominee has received contrary instructions from one or more of the shareholders at a shared address. We will deliver promptly, upon written or oral request, a separate copy of this Proxy Statement and our 2017 Annual Report to Shareholders to a shareholder at a shared address to which a single copy of the documents was delivered. A shareholder who wishes to receive a separate copy of the Proxy Statement and Annual Report to Shareholders, now or in the future, should submit this request by writing to: Omnicom Group Inc., 437 Madison Avenue, New York, New York 10022, Attn: Corporate Secretary or by calling our Corporate Secretary at (212) 415-3600. Beneficial owners sharing an address who are receiving multiple copies of Proxy Statements and Annual Reports to Shareholders and who wish to receive a single copy of such materials in the future will need to contact their broker, bank or other nominee to request that only a single copy of each document be mailed to all shareholders at the shared address in the future.

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ADDITIONAL INFORMATION

Shareholder Proposals and Director Nominations for the 2019 Annual Meeting

Any shareholder who wishes to present a proposal for inclusion in next year’s proxy statement and form of proxy under Rule 14a-8 must deliver the proposal to our principal executive offices no later than the close of business on December 13, 2018. Proposals should be addressed to: Omnicom Group Inc., 437 Madison Avenue, New York, New York 10022, Attn: Corporate Secretary.

For proposals or director nominations submitted outside the process of Rule 14a-8, our By-laws require that written notice of the proposal or nomination be provided to our Corporate Secretary no less than 60 days prior to the date set for the 2019 Annual Meeting of Shareholders. In order for a nomination for director or proposal to be considered, the notice must include, as to each nominee (if applicable) and the submitting shareholder, the information as to such nominee and shareholder that would be required to be included in a proxy statement under the proxy rules of the SEC if such shareholder were to solicit proxies from all shareholders of Omnicom for the election of such nominee as a director or approval of such proposal and such solicitation were one to which Rules 14a-3 to 14a-12 under the Exchange Act, apply.

In addition, our By-laws provide a proxy access right permitting certain of our shareholders who have beneficially owned 3% or more of our outstanding common stock continuously for at least three years to submit nominations via the Company’s proxy materials for up to 20% of the directors then serving, but not less than two. Notice of proxy access director nominations for the 2019 Annual Meeting of Shareholders must be delivered to our principal executive offices no earlier than November 13, 2018 and no later than the close of business on December 13, 2018. Proposals should be addressed to: Omnicom Group Inc., 437 Madison Avenue, New York, New York 10022, Attn: Corporate Secretary. In addition, the notice must set forth the information required by our By-laws with respect to each proxy access director nomination that a shareholder intends to present at the 2019 Annual Meeting of Shareholders.

A copy of the applicable By-law provisions may be obtained, without charge, upon written request addressed to: Omnicom Group Inc., 437 Madison Avenue, New York, New York 10022, Attn: Corporate Secretary. As the rules of the SEC and our By-laws make clear, submitting a proposal or nomination does not guarantee its inclusion.

Michael J. O’Brien
Secretary

New York, New York
April 12, 2018

76 2018 Proxy Statement

ANNEX A

Non-GAAP Financial Information

We present financial measures determined in accordance with generally accepted accounting principles in the United States (“GAAP”) and adjustments to the GAAP presentation (“Non-GAAP”), which we believe are useful measures to evaluate the performance of our businesses. Non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial information presented in compliance with GAAP. Non-GAAP financial measures reported by us may not be comparable to similarly titled amounts reported by other companies.

We define free cash flow (a Non-GAAP liquidity measure) as net income plus depreciation, amortization, share based compensation expense and 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.

Our method of calculating free cash flow may differ from methods used by other companies and, accordingly, may not be comparable to such other companies' measures. See the reconciliation of free cash flow to net income, the most directly comparable GAAP measure, below.

Reconciliation of Free Cash Flow to Net Income

	Year Ended December 31,
	2017		2016(1)
Net Income	$	1,192.2	$	1,246.7
Depreciation and Amortization Expense		282.1		292.9
Share-Based Compensation Expense		80.2		93.4
Impact of 2017 Tax Act(2)		106.3		—
Other Items to Reconcile to Net Cash Provided by Operating Activities, net		14.6		16.6
Free Cash Flow	$	1,675.4	$	1,649.6

(1)	Certain amounts for the year ended December 31, 2016 have been reclassified to conform to our current presentation, including for our adoption of ASU 2016-09 on January 1, 2017.
(2)	Reflects the net income impact of the net additional tax expense recognized as a result of the Tax Cuts and Jobs Act of 2017.

We define after tax reported operating profit (a Non-GAAP financial measure) as reported operating profit less income taxes calculated using the effective tax rate for the applicable period. We believe after tax reported operating profit is a useful measure of after tax operating performance as it excludes the after tax effects of financing and investing activities on results of operations.

Our method of calculating after tax reported operating profit may differ from methods used by other companies and, accordingly, may not be comparable to such other companies' measures. See the reconciliation of after tax reported operating profit to reported operating profit, the most directly comparable GAAP measure, below.

www.omnicomgroup.com 77

ANNEX A

Reconciliation of After Tax Reported Operating Profit to Reported Operating Profit

	Year Ended December 31,
	2017			2016
Reported Operating Profit	$	2,059.7		$	2,008.9
Effective Tax Rate for the applicable period		36.9	%		32.6	%
Income Taxes on Reported Operating Profit		760.0			654.9
After Tax Reported Operating Profit	$	1,229.7		$	1,354.0

We use EBITA and EBITA Margin as additional operating performance measures that exclude the non-cash amortization expense of intangible assets, which primarily consists of amortization of intangible assets arising from acquisitions. We define EBITA as earnings before interest, taxes and amortization of intangible assets, and EBITA Margin as EBITA divided by revenue, both of which are Non-GAAP financial measures. We believe that EBITA and EBITA Margin are useful measures for investors to evaluate the performance of our businesses.

The following table reconciles EBITA and EBITA Margin to the most directly comparable GAAP financial measure, Net Income - Omnicom Group Inc., for the periods presented (in millions):

Reconciliation of EBITA to Net Income

	Year ended December 31,
	2017			2016
Net Income - Omnicom Group Inc.	$	1,088.4		$	1,148.6
Net Income Attributed To Noncontrolling Interests		103.8			98.1
Net Income		1,192.2			1,246.7
Income From Equity Method Investments		3.5			5.4
Income Tax Expense		696.2			600.5
Income Before Income Taxes and Income From Equity Method Investments		1,884.9			1,841.8
Interest Income		49.7			42.6
Interest Expense		224.5			209.7
Operating Profit		2,059.7			2,008.9
Add back: Amortization of intangible assets		113.8			115.2
EBITA	$	2,173.5		$	2,124.1
Revenue	$	15,273.5		$	15,416.9
EBITA	$	2,173.5		$	2,124.1
EBITA Margin		14.2	%		13.8	%

When calculating our diluted EPS growth performance metric, we made two adjustments to Net Income - Omnicom Group Inc. for the year ended December 31, 2017, so that it was comparable to the year ended December 31, 2016. The following table shows the adjustments made (in millions):

Calculation of Net Income used for Diluted EPS Growth

	Year ended December 31, 2017
Net Income - Omnicom Group Inc.	$	1,088.4
Impact of 2017 Tax Act(1)		106.3
Excess tax benefits related to share based compensation(2)		(20.8	)
Net Income used for diluted EPS growth performance metric	$	1,173.9

(1)	Reflects the net income impact of the net additional tax expense recognized as a result of the Tax Cuts and Jobs Act of 2017.
(2)	Reflects the excess tax benefits related to share-based compensation resulting from the adoption of ASU 2016-09.

78 2018 Proxy Statement

This proxy statement was printed in the USA in a facility that uses
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	Shareowner Services P.O. Box 64945 St. Paul, MN 55164-0945
Address Change? Mark box, sign, and indicate changes below: ☐

TO VOTE BY INTERNET OR TELEPHONE, SEE REVERSE SIDE OF THIS PROXY CARD.

TO VOTE BY MAIL, SIMPLY INDICATE VOTING DIRECTIONS ON THE ITEMS BELOW, SIGN, DATE, AND RETURN THIS PROXY CARD.

The Board of Directors UNANIMOUSLY Recommends a Vote FOR all Nominees in Item 1.

1.	Election of directors:
		FOR	AGAINST	ABSTAIN
	01 John D. Wren	☐	☐	☐
	02 Alan R. Batkin	☐	☐	☐
	03 Mary C. Choksi	☐	☐	☐

	FOR	AGAINST	ABSTAIN
07 Ronnie S. Hawkins	☐	☐	☐
08 Deborah J. Kissire	☐	☐	☐
09 Gracia C. Martore	☐	☐	☐

   Please fold here – Do not separate   

04 Robert Charles Clark	☐	☐	☐
05 Leonard S. Coleman, Jr.	☐	☐	☐
06 Susan S. Denison	☐	☐	☐

10 Linda Johnson Rice	☐	☐	☐
11 Valerie M. Williams	☐	☐	☐

The Board of Directors UNANIMOUSLY Recommends a Vote FOR Items 2 and 3.

2.	Advisory resolution to approve executive compensation.	☐	For	☐	Against	☐	Abstain
3.	Ratification of the appointment of KPMG LLP as the Company’s independent auditors for the 2018 fiscal year.	☐	For	☐	Against	☐	Abstain

The Board of Directors UNANIMOUSLY Recommends a Vote AGAINST Item 4.

4.	Shareholder proposal regarding the ownership threshold for calling special shareholder meetings.	☐	For	☐	Against	☐	Abstain
THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED AS DIRECTED OR, IF NO DIRECTION IS GIVEN, WILL BE VOTED FOR ALL NOMINEES IN ITEM 1, FOR ITEMS 2 AND 3 AND AGAINST ITEM 4.

Date
	Signature(s) in Box
	Please sign exactly as your name(s) appears on the Proxy. If held in joint tenancy, all persons should sign. Trustees, administrators, etc., should include title and authority. Corporations should provide full name of corporation and title of authorized officer signing the Proxy.

ANNUAL MEETING OF SHAREHOLDERS

Tuesday, May 22, 2018
10:00 a.m. Eastern Daylight Time

15th Floor Conference Center
220 East 42nd Street
New York, NY 10017

For your reference, the Proxy Statement to solicit proxies for our 2018 Annual Meeting of Shareholders and our
2017 Annual Report to Shareholders are available, beginning April 12, 2018, at:
https://materials.proxyvote.com/681919

Omnicom Group Inc. 437 Madison Avenue New York, NY 10022	proxy
This proxy is solicited by the Board of Directors for use at the Annual Meeting on Tuesday, May 22, 2018.

The shares of stock you hold in your account or in a dividend reinvestment account will be voted as you specify on the reverse side.

If no choice is specified, the proxy will be voted “FOR” all nominees in Item 1, “FOR” Items 2 and 3, and “AGAINST” Item 4, and in the discretion of the proxies upon such other matters as may properly come before the Annual Meeting.

By signing the proxy, you revoke all prior proxies and appoint Philip J. Angelastro and Michael J. O’Brien, and each of them with full power of substitution, to vote your shares on the matters shown on the reverse side and any other matters which may come before the Annual Meeting and postponements or adjournments.

If the undersigned is a participant in our employee retirement savings plan and/or our employee stock purchase plan and has Omnicom stock allocated to his or her account(s), then the undersigned directs the trustee or the administrator of the relevant plan likewise to appoint the above-named individuals as proxies to vote and act with respect to all shares of such stock so allocated in the manner specified on the reverse of this card and in their discretion on all matters as may properly come before the meeting. If you are such a participant and your voting instructions are not received by 11:59 p.m. Eastern Daylight Time, on Thursday, May 17, 2018, the trustee of the employee retirement saving plan will vote your plan shares in the same proportion as it votes all other shares in the plan for which it has received timely voting instructions and the administrator of the employee stock purchase plan will not vote your shares.

Vote by Internet, Telephone or Mail
24 Hours a Day, 7 Days a Week

Your phone or Internet vote authorizes the named proxies to vote your shares
in the same manner as if you marked, signed and returned your proxy card.

INTERNET	PHONE	MAIL
www.proxypush.com/omc	1-866-883-3382
		Mark, sign and date your proxy
Use the Internet to vote your proxy	Use a touch-tone telephone to	card and return it in the
until 11:59 p.m. Eastern Daylight Time	vote your proxy until 11:59 p.m. Eastern	postage-paid envelope provided.
on Monday, May 21, 2018 or, for	Daylight Time on Monday, May 21, 2018 or,
shares held in Omnicom employee	for shares held in Omnicom employee
plans, 11:59 p.m. Eastern Daylight	plans, 11:59 p.m. Eastern Daylight Time
Time on Thursday, May 17, 2018.	on Thursday, May 17, 2018.

If you vote your proxy by Internet or by telephone, you do NOT need to mail back your Proxy Card.