Spring, Texas-based Exxon Mobil Corporation (XOM) explores and produces crude oil and natural gas. With a market cap of $613.7 billion, the company provides exploration and production of integrated fuels, lubricants, chemicals, and refined products for the automotive, trucking, aviation, and shipping industries to reduce greenhouse gas emissions. Companies worth $200 billion or more are generally described as “mega-cap stocks,” and XOM definitely fits that description, with its market cap exceeding this ...