Ketchum is one of the world's largest PR firms. The unit of advertising giant
operates through more than 100 offices spanning nearly 70 countries in the Americas, Asia, and Europe. Ketchum operates through five practices: brand marketing, corporate communications, food and nutrition, health care, and technology. The company also has specialty areas devoted to digital, global research, clinical trial recruitment, and change management, while Ketchum Sports & Entertainment unit forges relationships between brands and Hollywood, assists with contract negotiations for celebrities, and negotiates spokesperson appearances. The firm was founded in 1923 by Pittsburgh-based fundraiser George Ketchum.