South African-based Sasol (South African Coal, Oil and Gas Corporation) is an integrated energy and chemicals company in the business of mining, oil, gas, and chemical production. It uses a proprietary process to convert coal and gas into liquid fuels and chemicals.
The company is the world leader in integrated power plant, in power production services and air quality control systems. Alstom works with all energy forms (coal, gas, nuclear, fuel-oil, hydropower, wind). Alstom will provide the conventional island for the future EPR nuclear power plant in France. The Group is also developing CO2 capture processes that could lead to commercial scale in the medium term.
In the field of rail transport, Alstom is the global number one in terms of orders.
Valero Energy Corporation is a Fortune 500 company based in San Antonio, Texas, with 21,836 employees and annual revenue of more than US$90 billion. The company owns and operates 17 refineries throughout the United States, Canada and the Caribbean with a combined throughput capacity of approximately 3.3 million barrels per day, making it the largest refiner in North America.
ExxonMobil (NYSE: XOM) is the largest publicly traded integrated petroleum and natural gas company in the world, and the world's largest company measured by revenues ($404.5 billion in 2007) and market capitalization ($517.92 billion on July 20, 2007).
Since its privatization in the 1990s, Spain’s Repsol YPF has become one of the world’s largest integrated oil companies. While retaining its dominant position in its home country, Repsol made a major push into South America, becoming the largest foreign energy player on that continent. The YPF part of its name reflects a major acquisition in Argentina.