In the 2012 fortune 500 rankings, the 1, 3, and 4, positions were held by Exxon, Chevron, and ConocoPhillips respectively. Both Exxon and Chevron exceeded Walmart's PROFITS (more than doubled by Exxon).
http://money.cnn.com/magazines/fortune/fortune500/2012/full_list/
Similar results 2008-2011
I am calling upon the American people to petition the government to regulate gas prices set by American oil companies. It is truly not necessary for these companies to overcharge the American people at the gain of insane corporate profits exceeding those of retail monsters such as Walmart. It is a fundamental product to American productivity - we are left without a choice as to whether we need it or not. A company selling a product containing such attributes should be regulated.