The company, based in Sacramento, owns four ethanol production plants. Two in California produce 60mn and 40mn gallons a year, respectively, in Stockton and Madera. Plants in Burley, Idaho, and Boardman, Oregon, also produce 60mn and 40mn gallons a year, respectively.

A Chapter 11 filing shields a company from creditors as it reorganizes its finances under court supervision.

Pacific Ethanol lost $20.2mn