There is some good history in this blog:
Garrison Brothers Distillery Blog and Texas Bourbon News
--Excerpt from Dan Garrison's Bourbon Blog.--
So, technically, the Wild Turkey brand has been foreign-owned for more than 36 years. Wild Turkey is not alone; many distilleries are no longer American-owned. Japanese brewer Suntory owns Jim Beam Brands and Makers Mark. Japanese brewer Kirin owns Four Roses. Hudson Baby Bourbon from New York is owned by William Grant & Sons (London).
We spent two hours driving all over the property from the gift shop to the fermentation rooms to the stillhouse to the rickhouses and back to the visitors’ center. Other than the two clerks working in the gift shop and the tour guide, the only other humans we observed at the distillery were two guys hunched over a computer in a room that looked like the SpaceX mission control center. Other than a few lonely souls in the bottling hanger, it appears the entire Wild Turkey Distillery, which can churn out 50 million bottles a year, is almost entirely automated.
Jimmy and Eddie Russell make great bourbon. But are you buying “American” when you buy Wild Turkey? Tough call. All bourbon must be made in America but that does not mean the bourbon that’s produced is American-owned. Though Wild Turkey is made here, the profits and many of the jobs they create are headed to Italy. If you buy Wild Turkey bourbon you are supporting a brand with a rich American history. But don’t let McConaughey fool you into thinking you are creating jobs or helping our economy.