Codexis, Inc. is a protein engineering company. The Company is engaged in the development of biocatalysts for the commercial manufacture of pharmaceuticals and fine chemicals. The Company operates through its two segments, such as the performance enzymes and novel biotherapeutics. It provides enzyme optimization services from small scale through to commercial quantities and also develops biocatalyst products. It is also engaged in the development of manufacturing processes for active pharmaceutical ingredients, fine chemicals and food ingredients. Its CodeEvolver is a protein engineering technology platform and products in the pharmaceuticals market. The Company serves various industries, including food and food ingredients, animal feed, flavors, fragrances, and agricultural chemical.