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Codexis, Inc. discovers, develops, and sells enzymes and other proteins. The company operates through two segments, Performance Enzymes and Novel Biotherapeutics. It offers biocatalyst products and services. The company also provides biocatalyst screening and protein engineering services. In addition, it offers CodeEvolver, a technology platform, which helps in developing and delivering biocatalysts that perform chemical transformations and enhance the efficiency and productivity of manufacturing processes. The company's platform is also used for molecular biology and in vitro diagnostic enzymes. It has a collaboration agreement with Nestlé Health Science to develop CDX-7108 for the treatment of exocrine pancreatic insufficiency. The company sells its products to pharmaceutical manufacturers through its direct sales and business development force in the United States and Europe. The company was incorporated in 2002 and is headquartered in Redwood City, California.

FutureFuel Corp., together with its subsidiaries, manufactures and sells diversified chemical, bio-based fuel, and bio-based specialty chemical products in the United States. The company operates through two segments, Chemicals and Biofuels. The Chemicals segment provides various custom chemicals that are used in the coatings, chemical intermediates, industrial and consumer cleaning, oil and gas, and specialty polymers industries; and performance chemicals, such as polymer modifiers, glycerin products, and various specialty chemicals and solvents. The Biofuels segment is involved in the production and sale of biodiesel and petrodiesel blends; and markets its biodiesel products directly to customers through trucks, barges, and rail cars. FutureFuel Corp. is headquartered in Saint Louis, Missouri.

Green Plains Inc. produces low-carbon fuels in the United States and internationally. It operates through three segments: Ethanol Production, Agribusiness and Energy Services, and Partnership. The Ethanol Production segment produces ethanol, distillers grains, and ultra-high protein and renewable corn oil. The Agribusiness and Energy Services segment engages in the grain procurement, handling and storage, commodity marketing business; and trading of ethanol, distiller grains, renewable corn oil, grain, natural gas, and other commodities in various markets. This segment also provides grain drying and storage services to grain producers. The Partnership segment offers fuel storage and transportation services. It operates 24 ethanol storage facilities; two fuel terminal facilities; and a fleet of approximately 2,180 leased railcars. The company was formerly known as Green Plains Renewable Energy, Inc. and changed its name to Green Plains Inc. in May 2014. Green Plains Inc. was incorporated in 2004 and is headquartered in Omaha, Nebraska.

Renewable Energy Group, Inc. provides lower carbon transportation fuels in the United States and internationally. The company utilizes a production, distribution, and logistics system to convert natural fats, oils, and greases into advanced biofuels. It operates through Bio-Based Diesel, Services, and Corporate and Other segments. The company produces bio-based diesel from various low carbon feedstocks, including distillers corn and used cooking oils, and inedible animal fats, as well as from soybean and canola oils. It also purchases and resales bio-based diesel produced by third parties; and sells RD blended with petroleum-based diesel, renewable identification numbers and California low carbon fuel standard credits, raw material feedstocks from third parties, processed bio-based diesel, related byproducts, and renewable energy government incentive payments. In addition, the company provides day-to-day management and operational services to bio-based diesel production facilities; and construction management and general contracting services for the construction of bio-based diesel production facilities. Further, it engages in the trading of petroleum-based heating oil and diesel fuel, including the petroleum portion of sales of biodiesel and RD blended with petroleum-based diesel. As of December 31, 2021, the company owned and operated eleven biorefineries, consisting of nine locations in North America and two locations in Europe. Renewable Energy Group, Inc. was founded in 1996 and is headquartered in Ames, Iowa. As of June 13, 2022, Renewable Energy Group, Inc. operates as a subsidiary of Chevron Corporation.

Westlake Chemical Partners LP acquires, develops, and operates ethylene production facilities and related assets in the United States. The company's ethylene production facilities primarily convert ethane into ethylene. It also sells ethylene co-products, such as propylene, crude butadiene, pyrolysis gasoline, and hydrogen directly to third parties on either a spot or contract basis. Westlake Chemical Partners GP LLC serves as the general partner of the company. Westlake Chemical Partners LP was founded in 1991 and is headquartered in Houston, Texas.