Wunderman was a New York City-based global digital agency. It was part of Young & Rubicam Brands and a member of international advertising group WPP Group. On November 26, 2018, WPP announced it was merging Wunderman with the world's oldest ad agency J. Walter Thompson to form Wunderman Thompson, and the merger was formalized in February 2019. In 1958, direct marketer Lester Wunderman, alongside his brother Irving Wunderman, and colleagues Ed Ricotta and Harry Kline, opened Wunderman, Ricotta & Klein. Founder Lester Wunderman is widely considered to be the creator of modern-day Direct Marketing—a term he first used in 1961. In 1973, Wunderman, Ricotta & Kline was acquired by Young & Rubicam, at the time the world's largest ad agency. In the late 1980s, the group became Wunderman Worldwide. In 1992, the company merged with Cato Johnson to become Wunderman Cato Johnson. In 2000, the firm became part of WPP's $5.7B acquisition of parent Young and Rubicam. In January 2015, Wunderman acquired a majority stake in Peruvian digital agency Phantasia. In January 2017, Wunderman purchased a majority stake in Brazilian agency Pmweb Comunicacao Ltda. In June, the company acquired Spanish digital agency The Cocktail. In July, Wunderman and fellow WPP agency POSSIBLE were merged to form a digital marketing and advertising unit. The POSSIBLE brand was to remain separate, but would answer into Wunderman. In September, Wunderman took a controlling stake in Pierry, a US-based company that specialized in marketing campaigns for Salesforce Marketing Cloud.