Certain business trends have positively impacted our business and industry. These trends include clients increasingly expanding the focus of their brand strategies from national markets to pan-regional and global markets and integrating traditional and non-traditional marketing channels, as well as utilizing new communications technologies and emerging digital platforms. As clients increase their demands for marketing effectiveness and efficiency, they continue to consolidate their business within one or a small number of service providers in the pursuit of a single engagement covering all consumer touch points. We have structured our business around these trends. We believe that our key client matrix organization structure approach to collaboration and integration of our services and solutions provides 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 various components of our business, including revenue by discipline and geographic area, and material factors that affected us in 2019 are discussed in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” or MD&A, of this report. None of our acquisitions or dispositions, individually or in the aggregate, was material to our results of operations or financial position in the three years ended December 31, 2019. For information about our acquisitions, see Note 5 to the consolidated financial statements. Our clients operate in virtually every sector of the global economy. In many cases, multiple agencies or networks serve different brand, product groups or both within the same client. For example, in 2019 our largest client represented 3.0% of revenue and was served by more than 210 of our agencies and our 100 largest clients, which represent many of the world's major marketers, represented approximately 51% of revenue and were each served, on average, by more than 60 of our agencies. At December 31, 2019, we employed approximately 70,000 people worldwide. The skill sets of our workforce across our agencies and within each discipline are similar. Common to all is the ability to understand a client’s brand or product and its selling proposition and to develop a unique message to communicate the value of the brand or product to the client’s target audience, whether through traditional channels or emerging digital platforms. Recognizing the importance of this core competency, we have established tailored training and education programs for our client service professionals around this competency. See the MD&A for a discussion of the effect of salary and related costs on our results of operations. Each executive officer has held their present position for at least five years, except Mr. Wren was named Chairman of the Board and Chief Executive Officer in May 2018 and previously served as President and Chief Executive Officer from 1997 to May 2018; and Ms. Tarlowe was named Senior Vice President and Treasurer in May 2019 and previously served as Senior Vice President and Treasurer of Avis Budget Group from 2007 until April 2019. Additional information about our directors and executive officers will appear in our definitive proxy statement, which is expected to be filed with the United States Securities and Exchange Commission, or SEC, by April 9, 2020. 2 Information About Our Executive Officers Our Employees Our Clients Name Position Age John D. Wren Chairman of the Board and Chief Executive Officer 67  Philip J. Angelastro Executive Vice President and Chief Financial Officer 55  Michael J. O’Brien Senior Vice President, General Counsel and Secretary 58  Andrew L. Castellaneta Senior Vice President, Chief Accounting Officer 61  Peter L. Swiecicki Senior Vice President, Finance and Controller 61  Rochelle M. Tarlowe Senior Vice President and Treasurer 49  Jonathan B. Nelson CEO, Omnicom Digital 52  At January 30, 2020, our executive officers were: graphic arts/digital imaging healthcare marketing and communications instore design interactive marketing sales support search engine marketing shopper marketing social media marketing sports and event marketing