Our large and diverse client base includes many of the most recognizable companies and brands throughout the world. Our holding company structure allows us to maintain a diversified client base across and within a full range of industry sectors. In the aggregate, our top ten clients based on revenue accounted for approximately 20% and 21% of revenue in 2014 and 2013, respectively. Our largest client accounted for approximately 5% of revenue for 2014 and 2013. Based on revenue for the year ended December 31, 2014, our five largest clients (in alphabetical order) were General Motors, Johnson & Johnson, L'Oréal, Samsung and Unilever. We represent several different brands or divisions of each of these clients in a number of geographic markets, as well as provide services across multiple advertising and marketing disciplines, in each case through more than one of our agency brands. Representation of a client rarely means that we handle advertising for all brands or product lines of the client in all geographical locations. Any client may transfer its business from one of our agencies to another one of our agencies or to a competing agency, and a client may reduce its marketing budget at any time.
We operate in a highly competitive advertising and marketing communications industry. Our operating companies compete against other large multinational advertising and marketing communications companies as well as numerous independent and niche agencies to win new clients and maintain existing client relationships.
As of December 31, 2014, we employed approximately 47,400 people, of whom approximately 19,200 were employed in the United States. Because of the service character of the advertising and marketing communications business, the quality of personnel is of crucial importance to our continuing success. We conduct extensive employee training and development throughout our agencies and benchmark our compensation programs against those of our industry for their competitiveness and effectiveness in recruitment and retention. There is keen competition for qualified employees.
Our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and any amendments to these reports are available, free of charge, on our website at www.interpublic.com under the "Investor Relations" section, as soon as reasonably practicable after we electronically file such reports with, or furnish them to, the Securities and Exchange Commission at www.sec.gov. The public may also read and copy materials we file with the SEC at the SEC’s Public Reference Room, which is located at 100 F Street, NE, Room 1580, Washington, DC 20549. You can obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330.
Our Corporate Governance Guidelines, Interpublic Group Code of Conduct and the charters for each of the Audit Committee, Compensation and Leadership Talent Committee and the Corporate Governance Committee are available, free of charge, on our website at www.interpublic.com in the "Corporate Governance" subsection of the "About" section, or by writing to The Interpublic Group of Companies, Inc., 1114 Avenue of the Americas, New York, New York 10036, Attention: Secretary. Information on our website is not part of this report.
We are subject to a variety of possible risks that could adversely impact our revenues, results of operations or financial condition. Some of these risks relate to general economic and financial conditions, while others are more specific to us and the industry in which we operate. The following factors set out potential risks we have identified that could adversely affect us. The risks described below may not be the only risks we face. Additional risks that we do not yet know of, or that we currently think are immaterial, could also have a negative impact on our business operations or financial condition. See also Statement Regarding Forward-Looking Disclosure.
We operate in a highly competitive industry.
The advertising and marketing communications business is highly competitive. Our agencies and media services compete with other agencies and other providers of creative, marketing or media services, to maintain existing client relationships and to win new business. Our competitors include not only other large multinational advertising and marketing communications companies, but also smaller entities that operate in local or regional markets as well as new forms of market participants.
The client’s perception of the quality of our agencies’ creative work and its relationships with key personnel at the Company or our agencies are important factors that affect our competitive position. An agency’s ability to serve clients, particularly large international clients, on a broad geographic basis and across a range of services may also be an important competitive consideration. On the other hand, because an agency’s principal asset is its people, freedom of entry into the business is almost unlimited and a small agency is, on occasion, able to take all or some portion of a client’s account from a much larger competitor.