Top 10 deals of the US energy boom valued at $181 billion

This year has been a paltry one for oil and gas megadeals, which flourished in the opening years of the U.S. shale boom. Of the top 10 biggest deals in the U.S. energy industry during the past five years, just one occurred in 2013.

Here’s a look at the highest-valued energy industry mergers and acquisitions since 2008, based on Bloomberg data: