SandRidge Energy Inc. ( SD ) announced Tuesday morning that the company has emerged from Chapter 11 bankruptcy protection and the stock has resumed traded under its previous ticker symbol, SD, on the New York Stock Exchange. In its pre-arranged Chapter 11 filing in May, the company's new capital structure includes $425 million in a reserve-based lending facility and about $282 million in mandatorily convertible debt that bears no interest and may be converted at any time at the holders' option or mandatorily at the earlier of certain events or four years from the effective date of the plan. Under the terms of the deal, creditors exchanged $3.7 billion in debt for control of the company.