No. 3: WorldCom
Company value at time of bankruptcy: $103 billion
Worse than Enron and just as motivating to regulators was the 2002 collapse of WorldCom amid accounting scandals. The total value of the company was more than $103 billion at the time of its 2002 Chapter 11 bankruptcy. CEO Bernie Ebbers went to jail for what was, at the time, the largest corporate fraud in U.S. history. WorldCom emerged from bankruptcy with a new name (MCI) in 2004, then was bought out by Verizon (NYSE:VZ) a year later.