Dentsu Aegis Network Limited is a multinational media and digital marketing communications company headquartered in London, United Kingdom. It is a wholly owned subsidiary of the Japanese advertising and public relations firm Dentsu Inc. The company operates in 145 countries worldwide and has over 45,000 employees. Dentsu Aegis Network provides a range of services including media planning and buying, digital marketing, content creation, brand strategy and consulting, and social media marketing. The company's clients include major global brands such as General Motors, Microsoft, and Coca-Cola.