Roles on the largest energy and utilities merger announced so far this year have rocketed UBS and Jefferies into the top 10 on the global advisory league tables for the sector.
US oil refiner Marathon Petroleum Corporation announced Monday that its pipeline company MPLX will merge with MarkWest Energy Partners, which processes and transports gas. The deal values MarkWest at $20 billion, including debt of about $4.2 billion.
