Sivo d.o.o. Beograd

Grey Group is a global advertising and marketing agency, whose slogan is providing "Famously Effective" solutions - with headquarters in New York City, and 432 offices in 96 countries, operating in 154 cities[1] — organized into four geographical units: North America; Europe, Middle East & Africa, Asia-Pacific and Latin America.

Grey Global Group operates branded independent business units in many communications disciplines including: advertising, direct marketing, public relations, public affairs, brand development, customer relationship management, sales promotion, interactive marketing — through its subsidiaries: Grey, G2, GHG, GCI Group, MediaCom Worldwide, Alliance, G WHIZ, and WING.