BP is a London-based oil company with operations in more than 80 countries. The company is one of the biggest in the world, measured by 2011 revenues, and operates in all areas of the oil and gas sectors. In January 2013, a US judge accepted an agreement by BP to plead guilty for its role in the Deepwater Horizon disaster in which 11 workers died and pay a record US$4 billion in criminal penalties for the worst offshore oil spill in US history.