An article from
http://www.nytimes.com/2006/11/21/business/media/21viacom.html?ref=business:
"Then in 1984, when Sumner Redstone
bought out the remaining shares held by Michael Redstone and Michael’s sister, he did so at a depressed price, and had a conflict of interest because he was a trustee for the National Amusements trusts as well as chief executive of National Amusements."
How is "bought out the remaining shares" different from "bought the remaining shares"?