http://economix.blogs.nytimes.com/2012/02/09/apple-stocks-lofty-heights-in-context/
• Apple is now worth almost twice as much as Microsoft (about $258 billion) and more than twice as much as Google ($198 billion).
• It is also worth more than twice as much as General Electric (about $202 billion), I.B.M. (about $224 billion) or Wal-Mart ($212 billion).
• Apple — ranked 35th in the Fortune 500, which is based on annual sales — is worth eight times as much as the company just below it on the Fortune list (Boeing, at about $56.5 billion). Its value is 20 times as much as the company just above it (Medco Health Solutions, about $23.4 billion).