SEOUL, May 18 (Reuters) -
* South Korea's SK Holding Co Ltd said on Friday it had decided to invest $250 million in Brazos Midstream, a U.S. shale gas gathering and processing company, to expand its energy businesses.
* The South Korean company said in a statement that the investment would be made through its U.S.-based unit Plutus Capital.
* Brazos Midstream, a private natural gas and crude oil midstream company, is headquartered in Texas.
Reporting by Heekyong Yang and Jane Chung; Editing by Adrian Croft