Based in St. Louis, A-B is America's biggest brewer, with a 48.5% share of U.S. beer sales, including Budweiser and Bud Light. It's also the third-largest in the world, according to The Wall Street Journal. InBev is the second-largest, after global leader SABMiller, based in the U.K. A-B says its "board expects to make its determination regarding InBev's proposal in due course."
--Sarah Mahoney