Anheuser-Busch Companies, Inc. ( ) operates the largest brewing company in the United States in volume with a 48.8% share of beer sales. Worldwide, Anheuser-Busch's beer sales volume was 121.9 million barrels in 2005. It is the world's fourth largest brewing company based on revenue, after InBev, SABMiller and Heineken. The company is based in Saint Louis, Missouri, United States. "A-B", as the company is often called, operates 12 breweries in the United States and nearly 20 others overseas.

Anheuser-Busch is the last large-scale American brewery to be majority owned and operated in the United States.

Anheuser-Busch Companies, Inc. (ABC) is the holding company of Anheuser-Busch, Incorporated (ABI), a beer brewer. The Company is also the parent corporation to a number of subsidiaries that conduct various other business operations. ABC's operations comprise four segments: domestic beer, international beer, packaging, and entertainment, which contributed 74.7%, 6.6%, 10.9% and 7.8%, respectively, of the ABC's net sales, during the year ended December 31, 2006. Approximately 93% of the ABC's net sales are generated in the United States. Worldwide sales of the Company's beer brands aggregated 125 million barrels in 2006, which comprises domestic and international volume. International volume represents Anheuser-Busch brands produced overseas by company-owned breweries, under license and contract brewing agreements, plus exports from the Company's United States breweries.

Anheuser-Busch's best known beers include brands such as Budweiser, the Busch (originally known as Busch Bavarian Beer) and Michelob families, and Natural Light. The company also produces a number of smaller-volume and specialty beers, nonalcoholic brews, malt liquors (King Cobra and the Hurricane family), and flavored malt beverages (e.g. the Bacardi Silver family and Tequiza). Anheuser-Busch also owns interests in RedHook and Widmer Brothers Brewery.