Multiple choice general knowledge Which company is the biggest in terms of revenue in the world for the year 2009 Wall Mart Royal Dutch Shell British Petroleum Exxon Mobil Reveal answer Fill a bubble to check yourself B Correct answer Explanation Royal Dutch Shell was the world's largest company by revenue in 2009. Walmart and Exxon Mobil were also in the top ranks but Shell topped the list that year. BP was another major energy company but ranked below Shell.