Anheuser-Busch InBev SA/NV, commonly known as AB InBev, is a Belgian multinational drink and brewing company based in Leuven, Belgium and is the largest brewer in the world. In 2023, the company was ranked 72nd in the Forbes Global 2000. Additionally, AB InBev has a global functional management office in New York City, and regional headquarters in São Paulo, London, St. Louis, Mexico City, Bremen, Johannesburg, and others. It has approximately 630 beer brands in 150 countries.

A brewery or brewing company is a business that makes and sells beer. The place at which beer is commercially made is either called a brewery or a beerhouse, where distinct sets of brewing equipment are called plant. The commercial brewing of beer has taken place since at least 2500 BC; in ancient Mesopotamia, brewers derived social sanction and divine protection from the goddess Ninkasi. Brewing was initially a cottage industry, with production taking place at home; by the ninth century, monasteries and farms would produce beer on a larger scale, selling the excess; and by the eleventh and twelfth centuries larger, dedicated breweries with eight to ten workers were being built.