There have been several. Saudi Aramco is one right now (and has been for some time), but it's not publicly traded. http://www.visualcapitalist.com/most-valuabl

There have been several. Saudi Aramco is one right now (and has been for some time), but it's not publicly traded. http://www.visualcapitalist.com/most-valuable-companies-all-time/ http://www.visualcapitalist.com/most-valuable-companies-all-...