Cite? When's the last time A-B did that? They've bought into several craft breweries, but all are still up and running (and doing relatively well, thanks, in part, to being part of A-B superior distribution chain). They did buy the *brand names* "Rolling Rock" and "Latrobe Brewing Co." in '06, and the owner of the brewery, InBev, sold the plant in a separate deal, to City Brewing. The brewery is up and brewing, among others things, some Samuel Adams beers.
Perhaps you're talking about A-B purchase of the American Brewing Company in Miami, FL- in 1958? They ran the brewery for several years, but anti-trust regulators made them get rid of it. It was bought by the National Brewing Co. and closed in 1975.
All the big breweries that specialized in "gobbling up" the small breweries are gone. Falstaff, Heileman, Stroh, Pabst (survives in name only- no breweries), Carling, National, Associated. Mostly because they wound up with a lot of pre-Prohibition era, inefficient, high labor cost, inner city breweries trying to compete with A-B's modern, automated "beer factories". In some respects, the government's trying to regulate A-B's growth was the best thing that ever happened to them, in that they built new, rather than purchase old, breweries.