Massey Energy Company was a coal extractor in the United States with substantial operations in West Virginia, Kentucky and Virginia. By revenue, it was the fourth largest producer of coal in the United States and the largest coal producer in Central Appalachia. By coal production weight, it was the sixth largest producer of coal in the United States.

The Upper Big Branch Mine disaster occurred on April 5, 2010 roughly 1,000 feet (300 m) underground in Raleigh County, West Virginia at Massey Energy's Upper Big Branch coal mine located in Montcoal. Twenty-nine out of thirty-one miners at the site were killed. The coal dust explosion occurred at 3:27 pm. The accident was the worst in the United States since 1970, when 38 miners were killed at Finley Coal Company's No. 15 and 16 mines in Hyden, Kentucky. A state funded independent investigation later found Massey Energy directly responsible for the blast.