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8 Houston energy companies land on Time's top greentech list for 2025

Fervo Energy claimed a top 10 spot on Time magazine and Statista’s new list of America’s Top GreenTech Companies of 2025. Photo via Getty Images.

The accolades keep rolling in for Houston-based Fervo Energy, a producer of geothermal power.

Fervo lands at No. 6 on Time magazine and Statista’s new list of America’s Top GreenTech Companies of 2025. The ranking recognizes sustainability-focused companies based on factors such as impact, financial strength, and innovation.

Time notes that Fervo broke ground in 2023 in Utah on what the company claims will be the world’s largest geothermal plant. The plant is scheduled to start supplying carbon-free electricity to the grid next year and to reach its 400-megawatt capacity in three years.

“Technologies like this only make a difference if we deploy them at large-scale in a way that can reduce carbon emissions and increase the reliability of the grid,” Fervo CEO Tim Latimer told Time in 2023.

The startup was named North American Company of the Year by research and consulting firm Cleantech Group for 2025. Fervo topped the Global Cleantech 100, Cleantech Group’s annual list of the world’s most innovative and promising cleantech companies.

Last year, Fervo also made Time’s list of the 200 Best Inventions of 2024. Fervo was recognized in the green energy category for its FervoFlex geothermal power system.

Founded in 2017, Fervo is now a unicorn, meaning its valuation as a private company exceeds $1 billion. The startup’s valuation is estimated at $1.4 billion. According to PitchBook data, the company raised $634 million in the fourth quarter of 2024.

In all, eight Houston-area companies appear among the top 250 greentech companies ranked by Time and Statista. Other than Fervo, they are:

  • No. 43 Lancium Technologies, an energy storage and distribution company
  • No. 50 Solugen, a producer of sustainable chemicals.
  • No. 56 Quaise Energy, which specializes in terawatt-scale geothermal power.
  • No. 129 Plus Power, a developer, owner and operator of battery storage projects.
  • No. 218 Dream Harvest, which promotes sustainable vertical farming.
  • No. 225 Cemvita, which uses synthetic biology to convert carbon emissions into bio-based chemicals.
  • No. 226 Syzygy Plasmonics, which decarbonizes chemical production.
Vermont-based BETA Technologies claimed the No. 1 spot. The company manufactures electric aircraft.

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A View From HETI

Mike Chilton is the CEO and founder of Fluxpoint Energy. Photo courtesy Fluxpoint

A new nuclear energy startup launched last month during CERAWeek in the Bayou City.

FluxPoint Energy, the new Houston- and McLean, Virginia-based company, plans to develop the nation’s first new uranium conversion facility in more than 70 years, an effort CEO and founder Mike Chilton says is critical to unlocking the next phase of nuclear energy growth.

"Policymakers, utilities, and developers increasingly point to fuel availability as a limiting factor for America's nuclear reactors—both present and future," Chilton said in a news release. "Uranium conversion has become an unacceptable chokepoint in a global supply chain still dominated by foreign providers."

Chilton has held leadership roles at Pegasus-Global Holdings and GE Verona Hitachi Global Nuclear Fuels. Rodrigo Gonzalez Arbizu serves as COO and Christopher J. Rimel as chief of staff. The Board of Advisors includes energy leaders, including Jeff Lyash, John Sharp, Jane Stricker, Jennifer Skylakos, Leo Weitzenhoff and Jay Wileman.

FluxPoint’s planned facility will convert uranium oxide into uranium hexafluoride (UF6). Although FluxPoit’s new facility is still far off, the company announced it had secured a site and completed both market and feasibility studies. The specific area has not been revealed, only that it will be in Texas.

Discussions at CERAWeek revolved around securing reliable sources of uranium.

Nuclear energy production has been stagnant or even in slight decline since the 1990s. Concerns about nuclear waste and safety, as well as prohibitive costs, have kept new plants from being built, while the widespread availability of cheap natural gas has made investing in nuclear power less profitable. Many see the technology as dangerous and outdated.

However, as energy crises become more common, companies like FluxPoint are looking to restart the nuclear energy sector. The industry got a boost under the Biden Administration thanks to the Inflation Reduction Act, which set goals of adding 35 gigawatts of new capacity by 2035.

Chilton participated in a panel on the best ways to ensure American nuclear plants have access to uranium, most of which is not mined in the United States.

"America cannot lead in nuclear energy while relying on foreign-controlled fuel processing," Chilton added. "FluxPoint was created to restore a critical piece of our nation's energy infrastructure—ensuring that U.S. reactors have access to a secure, domestic fuel supply. This is about energy security, economic strength, and global leadership."

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