Gevo Inc
 Gevo Inc. is a renewable chemicals and advanced biofuels company headquartered in unincorporated Douglas County Colorado in the Denver-Aurora metropolitan area. The company develops bio-based alternatives to petroleum-based products using a combination of biotechnology and classical chemistry. Gevo converts renewable raw materials into isobutanol and renewable hydrocarbons that Gevo believes can be directly integrated on a “drop in” basis into existing fuel and chemical products.