Four years of losses at YRC Worldwide, once the largest publicly-traded trucking company, led to a restructuring in 2012. Formed in a roll-up of other trucking companies, YRC's revenue hit a high in 2009. But debt piled on by those acquisitions left the company vulnerable after the financial crisis. The shipping business declined. Other customers shied away from using YRC because of fears about its high debt.
In 2012, executives decided to swap some of the company's debt for equity, issuing more shares. That should put the company on better financial footing, even as current shareholders take a hit.
Wal-Mart retook the top spot, Berkshire Hathaway made the top five, and Apple grew enormously.