広告サービストップ企業
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WPP Plc (Ogilvy, Y&R, Grey)
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The Interpublic Group of Companies Inc. (McCann Worldgroup, MullenLowe U.S.)
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Omnicom Group Inc (BBDO, DDB Worldwide)
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Lamar Advertising Company (Lamar Media Corp.)
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Dentsu Aegis Network Ltd. (Dentsu Inc.)
*免責事項:上位企業は順不同