coors
There are thousands of American owned breweries, but the big three, Bud, Coors, and Miller are owned by outside companies.
You can find information from the coors website or visit their shop. They have a shop at the brewery in Golden Colorado.
While I don 't know all owners at this point, the Canadiens have been owned by the Molson family, Molson Brewery, recently by Mr. George Gellette, and now once again by Molson-Coors Brewery. Perhaps you might do a Google search for more comprehensive information.
The Coors Ceramics Company is owned by Coors Brewing
Keystone is owned by Coors
Coors Beer is distributed by authorized coors brewing company beer distributors. Coors beer is also delivered in refrigerated trucks and rail cars to keep the beer cold. You can learn more about coors brewery and how they make coors light at the related link.
Keystone Light is owned by Coors
All three of the largest beer companies are owned by a foreign company; Coors, Miller and Anheuser Busch.
Molson is the oldest brewery in North America.
There are around 1,500 American breweries, most of them small with limited distribution. Among the larger ones are Stone Brewing Co., Boston Beer Co., Sierra Nevada Brewing, Dogfish Head Craft Brewery, and Yuengling Brewing. The breweries typically associated with the U.S., Budweiser, Miller, and Coors are all owned by foreign conglomerates now.
I'm not sure of the order, but these are definitely somewhere in the top 10, if not the top 5. Foster's Brewery, Australia SABMiller Brewery, South Africa, Coors Brewery, Golden, CO Anheuser-Busch Brewery, St. Louis, MO Anheuser-Busch Brewery, Van Nuys, CA