Mplx LP
A midstream energy company that moves crude oil, natural gas, and refined fuels through roughly ten thousand miles of pipelines, barges, and storage terminals across the United States. It was formed in 2012 by Marathon Petroleum, and its name blends "MP" for Marathon Petroleum with "LX" for logistics. In 2015 it absorbed MarkWest Energy, a major natural gas processor, making it one of the country's largest midstream operators.
Common Units Representing Limited Partner Interests
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.