The company denies any wrongdoing and notes that employees were free to sell their stock at any time (unlike YRC, Enron restricted employee stock sales).
Unable to meet its debts, YRC underwent a financial restructuring that wiped out most shareholders and forced it to layoff a large percentage of its workforce.
Employees recently filed a class action in U.S. District Court in Kansas charging YRC with breaching its fiduciary duty by loading up their retirement accounts with its own stock.