The most expensive stock per share in the world is Berkshire Hathaway as of August of 2014. On August 14, 2014, it closed at $202,850 per share.
Berkshire Hathaway is led by Warren Buffett, one of the world's top richest men. With its headquarters in Omaha, Neb., the company has interests in life insurance, jewelry sales, annuity sales and Government Employees Insurance Company, or GEICO, which is America's second-biggest auto insurer. Buffett built much of his wealth by investing money from insurance premiums in other companies. Forbes Global 2000 lists Berkshire Hathaway as the fifth-largest public company in the world.