11:17 AM on 11/16/12
The Rational Voice of AP.net
Just to clarify: Their net worth doesn't necessarily mean liquid assets. I suspect most of that money is tied up in long term (10-30 year) bonds, and some real estate. Also, the article could be factoring in the intrinsic value of the brand to which they've built - much like owning the name Apple or McDonalds has value in and of itself.