http://www.forbes.com/sites/briansolomon/2013/07/24/the-wal-...
They're an employee-owned, private company in one of the most low margin and cut-throat industries around. Both their profit and effect on the competition is incredible. Also, their management to worker ratio. ;) It would be interesting to see tech companies adopt a model like this. The results could be exciting to watch and maybe lead to more job security as well given every other kind of company likes to sell out.