I would say there probably aren't 5 and definitely not all owned by the U.S. This article may help you.
http://www.youthxchange.net/main/b261_media-concentration-c.asp
The five major conglomerates that control a significant portion of the media in the United States are Comcast, The Walt Disney Company, ViacomCBS, AT&T, and Fox Corporation. These companies own a variety of television networks, film studios, cable channels, and other media properties, giving them significant influence in the media landscape.
Nearly 500 U.S. companies manufactured process control instruments (PCIs) in 2001, and the value of all industry shipments that year was nearly $7 billion
There is no 'state' in Africa that is nearly as big as the United States. The Sahara is nearly as big as the contiguous United States but the Sahara is a desert and not a state or country.
The Sahara is nearly as big as the contiguous 48 United States.
Northern Africa, or the southwestern United States.
There are over 350 Red Lobster seafood restaurants in the United States, with nearly the same amount again overseas. They are to be found at locations across the United States.
There were nearly 200 city-states who united to fight off the Persians.
Inches in the United States Centimeters nearly anywhere else in the world
The size of the United States nearly doubled
Nearly all countries can get tornadoes, but the top the are the United States, Canada, and Australia.
United states & Russia :()
Of course. Nearly all cars in the United States are left-hand drive.
Well, for one, it nearly doubled the size of the United States.