JWT : J. Walter Thompson

JWT is the current name of the United States largest and world's fourth largest advertising agency originally founded by William James Carlton in 1864 and renamed by James Walter Thompson in 1877 to The James Walter Thompson Company.

JWT is one of the key companies of Sir Martin Sorrell's WPP Group and is headquartered in New York.

JWT claims to be the first agency to invent copy and layouts; build the first full-service advertising agency; pioneer ad careers for women; produce the first sponsored TV program; develop account planning, and create the first international network. JWT's network has more than 8,500 employees in 300-plus offices in 87 countries who serve over 1,200 clients.

JWT's 'relationship marketing', or direct, digital and promotions network is RMG Connect. RMG's network is expanding across JWT offices around the globe, and currently has more than 750 employees in 21 countries and 31 offices.

In 2005, JWT "relaunched" the agency by dropping the name "J. Walter Thompson" in exchange for "JWT."