Meet the family behind the No. 1 Fortune 500 company By: CNBC.com News May 23, 2018 at 09:56 AM EDT This American institution has topped the Fortune 500 list a total of 14 times since the magazine published the first list in 1955. Read More >> Related Stocks: Apple Berkshire Hathaway Exxon Mobil UnitedHealth Group Wal-Mart Stores, Inc.