Find out about the Milwaukee Brewers' owner's net worth, source of wealth and ownership history of the MLB franchise. The Milwaukee Brewers are a household franchise in the MLB based in Milwaukee, Wisconsin. They are a member club of the National League Central Division and were originally founded in 1969 as the Seattle Pilots before relocating to Milwaukee in 1970 and thus became the Brewers. Who owns the Milwaukee Brewers? The Milwaukee Brewers are currently owned by Mark Attanasio, who has been the principal owner of the franchise since 2005. Other investors in the ownership group include Robert D. Beyer, Antony Ressler, and Giannis Antetokounmpo. Milwaukee Brewers ownership structure Mark Attanasio Mark L. Attanasio (born September) is an American businessman who is known for his position as the principal owner of the Milwaukee Brewers and the majority shareholder of English football club Norwich City FC. Mark L. Attanasio has a net worth in the region of $700 million ac...