Ikea's annual revenue is about 38 billion Euros. That would rank it about #200 on the Fortune 500 global list, in terms of revenue. By Fortune's tally, at least, all of the top 10 are either state-controlled energy companies, auto companies, WalMart or Berkshire Hathaway.

Big, fully private companies are quite fascinating. (I think we're settling on a definition that involves a tight inner circle of ownership, with no stock-market listing and no government control). But they are pretty lightly represented in revenue/size-based lists like the Fortune 500.