China and Brazil have one each of our Big 4:
https://1915farm.com/blogs/education/part-3-meat-mergers-and-the-rise-of-the-big-4
The linked article includes the following about Cargill. They have power over some of the most unhealthy foods in the USA.
……
“Cargill Inc., the largest privately-held corporation in the United States. Cargill runs the biggest flour-milling company in the world, is a leading corn syrup and soybean processor,”