The global oil and gas industry is enormous, and serving the endless global appetite for oil and gas has propelled many companies into the realm of the mega-caps. Were they independent entities, the revenues of companies like Exxon Mobil ( XOM ), BP ( BP ) and Royal Dutch Shell ( RDS.A ) would be such that they’d be among the 30-largest countries by GDP. Not surprisingly, that makes them highly significant stocks as well [for more oil and gas news and analysis subscribe to our free newsletter ]. See the full story here → Related Posts: 5 Of The Biggest Oil Finds In History Breaking Down the Cost of a Gallon of Gas 13 Commodity Earnings You Can’t Afford to Miss Top 5 Global Oil Stocks by Market Cap Want Juicy Dividend Yields? Buy the Top Five Commodity Megacaps