6 US Biofuel Stocks

Market cap: US$644.36 million

REX American Resources has interests in six ethanol production facilities that together have the capacity to produce 730 million gallons of ethanol. The company is the majority owner of two of these facilities, One Earth Energy in Illinois and NuGen Energy in South Dakota, which combine for capacity of 300 million gallons. It is also a minority owner of holding company Big River Resources, which has four production plants across Iowa, Illinois and Wisconsin.

REX is advancing its expansion campaign at its ethanol production facility at the One Earth Energy facility, which will increase annual ethanol production capacity from 150 million gallons to 175 million gallons. The company expects to complete the expansion in mid-2025. REX is also planning to obtain permits to further expand the facility to an annual production capacity of 200 million gallons.

Market cap: US$444.44 million

Montauk Renewables is a US renewable energy company specializing in the recovery and conversion of biogas derived from landfill methane into renewable natural gas (RNG) or electrical power for the electrical grid. The company has 14 operating projects and ongoing development projects located in California, Idaho, Ohio, Oklahoma, Pennsylvania, North Carolina, South Carolina and Texas.

For its fiscal year 2024, Montauk’s RNG revenues are expected to come in at between US$175 million and US$185 million, while its renewable electricity revenues are expected to be between US$17 million and US$18 million. Its full year results will be available in mid-March.

Market cap: US$407.88 million

OPAL Fuels is another renewable energy company that specializes in capturing and converting biogas into RNG. The company’s fully integrated vertical waste-to-energy model takes biogas from landfills and dairies to create fuel for use in heavy- and medium-duty trucking fleets, as well as renewable power for sale to utilities.

In late February 2025, the company announced a series of 50/50 joint venture partnerships to develop four new landfill RNG production projects. OPAL's share represents 1.5 million MMBtu of aggregate annual design capacity.

Market cap: US$316.02 million

Gevo is a renewable chemicals and next-generation biofuels company with headquarters in Colorado. Gevo produces isobutanol, ethanol and high-value animal feed at its fermentation plant in Minnesota. Over in Texas, it operates a biorefinery that converts alcohols into products ranging from renewable jet fuel to octane and even ingredients for plastics.

Gevo owns and operates one of the largest dairy-based RNG facilities in the United States and operates an ethanol plant with an adjacent carbon capture and sequestration facility.

In February 2025, Gevo announced a partnership with French energy company Axens “to accelerate development and commercialization of sustainable aviation fuel (SAF) using the ethanol-to-jet (ETJ) pathway.” Gevo is currently developing the world's first ethanol-to-jet SAF commercial production facility, Net-Zero 1, which will be located in South Dakota.

Market cap: US$186.87 million

FutureFuel is a developer and producer of diversified chemical products, specialty organic chemicals, premium biodiesel and other biofuels, such as ethanol and biomass solids. FutureFuel launched its biofuels product platform in 2005 and now has a biodiesel production capacity of 60 million gallons per year.

FutureFuels announced a quarterly dividend program for 2025 that will distribute cash dividends of US$0.06 per share, with the first payment of the year on March 18.

Market cap: US$118.58 million

Verde Clean Fuels is a renewable gasoline technology company with projects under development in North America. The company converts biomass feedstocks such as agricultural byproducts into renewable, low-carbon gasoline compatible with standard car engines and refueling stations.

In the past two years, Cottonmouth Ventures LLC, a wholly owned subsidiary of Diamondback Energy (NASDAQ:FANG), has made US$70 million in investments into Verde Clean Fuels, indirectly making the multibillion dollar Texas-based oil and gas company the second largest shareholder of Verde. The most recent came in January 2025.

The two companies are collaborating on developing and constructing natural-gas-to-gasoline plants that will use Verde's technology to convert natural gas from Diamondback's Permian Basin operations.