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"The closing bell rang Wednesday with Apple&amp;#8217;s market cap, for the first time, at No. 1\u00A0\n\n  \nChart courtesy of ycharts.com\nApple \n\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tAAPL\n\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t, for now at least, is the world&amp;#8217;s most valued company by market capitalization (determined by multiplying a company&amp;#8217;s stock price times number of shares outstanding). Here&amp;#8217;s how it happened:\n\nIt caught up to Google \n\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tGOOG\n\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t in mid-2009\nIt overtook Walmart \n\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tWMT\n\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t in March 2010\nIt passed Microsoft \n\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tMSFT\n\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t in May 2010\nIt caught up to Exxon Mobile \n\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tXOM\n\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t Tuesday and closed higher, for the first time, on Wednesday, Aug. 10, 2011"^^<http://www.w3.org/2001/XMLSchema#string>
<http://fortune.com/2011/08/10/how-apple-overtook-google-walmart-microsoft-and-exxon/>