Crusader Energy Group filed for bankruptcy in Dallas, listing $750 million in assets and $326 million in debts. The company went public less than a year ago.
Nova Biofuels, Nova Biosource Technologies and affiliates filed for bankruptcy in Delaware, listing more than $50 million in debts.
Read the Top 8
Sign up for the Top 8, a roundup of the day's top stories delivered directly to your inbox Monday through Friday.