World Fuel Services Corporation (WFS, World Fuel) is an energy, commodities, and services company based in Miami, Florida. The company ranked No. 91 in the 2018 Fortune 500 list of the largest United States corporations. WFS focuses on the marketing, trading, and financing of aviation, marine and ground transportation fuel commodities and related services. As of 2013, WFS also operates in natural gas and power. The global leader in marine refueling, in 2018 WFS sold a record total of 21 billion gallons of fuel for $39.8 billion in revenue.