Archer-Daniels-Midland, a component of the S&P 500, is the largest and oldest company on this list, founded in 1898. They have revenues of over $37 billion. They process, sell, and ship many types of agricultural products. Ethanol is a small part of their overall business.

Australian Ethanol Limited (ASTUF.PK) The company plans to produce ethanol plants in Australia.

BlueFire Ethanol (BFRE.PK) This Irvine, California based company plans to develop and construct 20 cellulosic ethanol plants.

Diversa (DVSA) The reason that this company was included on the list is because the company develops enzymes, which can be used to convert starch into sugar to create ethanol. This is a San Diego, California based company which started in 1992.

Dyadic International (DIL) Dyadic, based in Florida, was founded in 2002. Another enzyme company included on the list. They develop and sell specialty enzymes, a portion of which are used in production of ethanol.

Green Plains Renewable Energy (GPRE) This is a Las Vegas, Nevada and Shenandoah, Iowa based company that was founded in 2004. They plan to develop an ethanol production facility in Iowa.

Pacific Ethanol (PEIX) This company is a newcomer on the scene, founded three years ago in central California. They are currently building ethanol plants, and own an ethanol sales division. They recently came public in 2005.

Gulf Ethanol Corporation (GFET.PK) This company markets and distributes sugarcane-based ethanol. They are based in Houston, Texas.