DBpedia

DBpedia is a community effort to extract structured information from Wikipedia and to make this information available on the Web. The datasets made by DBpedia can be queried with w:SPARQL language if MediaWiki/Extensions/LinkedWiki extension is installed on a mediawiki. This way lot of company information ( Founded in year, type of business entity etc. etc. ) can be fetched from datasets of infobox data on the 'pedia.