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

top honor

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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Plus Power's storage facility, being built on 13 acres in Comal County, is scheduled to come online this spring. Photo courtesy of Plus Power

Houston-based developer claims $98 million tax equity investment for Texas energy storage facility

seeing green

The Woodlands-based Plus Power has collected an estimated $98 million tax equity investment for its 200-megawatt Ebony Energy Storage facility near San Antonio.

Plus Power says the investment from Solana Beach, California-based Greenprint Capital Management will help stabilize the Energy Reliability Council of Texas (ERCOT) power system “during dynamic summer demand and cold winter storms while helping to integrate more renewable energy into the grid.”

The storage facility, being built on 13 acres in Comal County, is scheduled to come online this spring.

Peter DeFazio, managing director of Greenprint, calls Plus Power “a first mover” among owner-operators of standalone battery energy storage facilities in the U.S. Plus Power owns a portfolio of large-scale lithium-ion battery systems in more than 25 states and Canada.

“As the state and the country experience increasingly extreme temperatures, we are proud that our projects can provide grid services that will help ERCOT increase reliability and meet abnormally high demand,” says Josh Goldstein, chief financial officer of Plus Power.

By this summer, Plus Power expects to be operating four storage plants in the ERCOT market with 800 megawatts of total capacity.

Plus Power announced in 2023 that it completed a $1.8 billion financing for Ebony and four other projects in Texas and Arizona. The financing included $196 million in construction and term financing for the Comal County project.

Plus Power has announced its Oahu, Hawaii, facility is up and running. Photo via pluspower.com

Houston clean energy company goes online with Hawaii facility

aloha

Houston-based Plus Power announced it has begun operating a new facility on Oahu, Hawaii.

The Kapolei Energy Storage, or KES, facility is “the most advanced grid-scale battery energy storage system in the world,” which will help transition the state's electric power from coal and oil to solar and wind, according to the company.

The KES battery project is located on 8 acres of industrial land on the southwest side of Oahu near Honolulu, and will use 158 Tesla Megapack 2 XL lithium iron phosphate batteries. It will offer the grid 185 megawatts of total power capacity and 565 megawatt-hours of electricity. This will act as an electrical "shock absorber" that will be served by combustion-powered peaker plants to respond in 250 milliseconds according to Power Plus.

"This is a landmark milestone in the transition to clean energy," Brandon Keefe, Plus Power's executive chairman, says in a news release. "It's the first time a battery has been used by a major utility to balance the grid: providing fast frequency response, synthetic inertia, and black start. This project is a postcard from the future — batteries will soon be providing these services, at scale, on the mainland."

The KES plant interconnects three of Hawaiian Electric's critical power generation facilities, which can enable KES to support the reboot of power plants in the event of a state-wide emergency.The KES batteries will help replace the grid capacity formerly provided by an AES coal power plant.

By June 2024, Plus Power aims to operate seven large-scale battery energy storage plants across Arizona and Texas. Last year, the company secured $1.8 billion in new financing for a handful of ongoing projects — most of which are in Texas.

Five of Plus Power's projects received financing from nearly a dozen financial partners. Photo courtesy of Plus Power

Houston renewable energy storage developer secures $1.8B in financing

money moves

A Houston company that develops standalone battery energy storage systems has reportedly secured $1.8 billion in new financing for a handful of ongoing projects — most of which are in Texas.

"Over the last year, Plus Power has raised an unparalleled amount of capital for standalone storage projects from a wide range of leading energy project finance banks and investors," Josh Goldstein, CFO of Plus Power, says in a news release. "This capital will support the ongoing buildout of the largest and most diverse portfolio of standalone storage projects in the U.S. The scale highlights our first-mover advantage in bringing high-quality projects to market as well as the tremendous work by our fantastic team."

The funding will be distributed to the following projects, which are expected to have a total of 1,040 megawatts of capacity, according to the release:

  • The 250-megawatt Sierra Estrella Energy Storage facility in Avondale, Arizona, west of Phoenix will use $707 million of the financing — $202 million of tax equity and a $505 million construction, term loan, and letter of credit facility from Bank of America. Expected to deliver by summer of next year, the 11-acre facility will be the largest to date for a standalone energy storage project, according to Plus Power.
  • $212.2 million of tax equity financing from Foss & Company, as well as $276 million of construction and term financing, for the 300 MW / 600 MWh Rodeo Ranch Energy Storage facility in Pecos.
     
  • $196 million of construction and term financing for the 200 MW / 400 MWh Ebony Energy Storage facility in Comal County, northeast of San Antonio.
     
  • $200 million of construction and term financing for the 200 MW / 400 MWh Anemoi Energy Storage facility in Hidalgo County, on the Mexican border northwest of Matamoros.
  • $196 million construction, term loan and letter of credit facility for the 90 MW / 360 MWh Superstition Energy Storage project in Gilbert, southeast of Phoenix.

The $884 million committed to three new standalone storage facilities in Texas bring Plus Power's current ERCOT portfolio to 800 MW. Deutsche Bank and First Citizens Bank were the coordinating lead arrangers, per the news release.

"Plus Power is a market leader in the battery energy storage sector and we are honored to have collaborated with them on these breakthrough financings," Jeremy Eisman, managing director and head of Infrastructure & Energy Financing at Deutsche Bank, says in a statement. "We acknowledge the important role that battery storage plays in ensuring a clean and reliable electric grid and look forward to continuing to support the Plus Power team's continued growth in this sector."

Plus Power's portfolio includes large-scale lithium-ion battery systems across 25 states and Canada. The company reports that three of the projects will be completed before next year's summer heat rolls back in.

Originally founded in San Francisco in 2018, Plus Power moved its HQ to Houston last year. The company recently signed a lease for nearly 7,000 square feet at Three Hughes Landing in The Woodlands. The company previously was based in coworking space at the Rayford Office Park in Spring.

Plus Power, which recently relocated its HQ to Houston, has moved into a larger office space. Image via cushmanwakefield.com

Energy storage startup moves into larger Houston-area space, plans to grow team

expansion plans

A Northern California-born energy storage startup has established its headquarters in The Woodlands.

Plus Power, which develops battery systems designed to store backup power for electric grids, recently signed a lease for nearly 7,000 square feet at Three Hughes Landing in The Woodlands. The company previously was based in coworking space at the Rayford Office Park in Spring.

The company, founded in 2018, shifted its headquarters from San Francisco to the Houston area last year.

“We chose The Woodlands for its beauty, and walkable access to great nearby hotels, restaurants, and healthy groceries,” says Brandon Keefe, CEO of Plus Power. “A Houston base reflects our deep focus on the Texas market, as we are investing nearly $1 billion in several projects here that will be online by the first quarter of 2024, with more in [the works] behind that.”

About 40 employees work from Plus Power’s new office in The Woodlands. Across North America, the company employs about 130 people, including several in Austin. As of July 10, the startup listed nine job openings.

Plus Power develops, owns, and operates utility-scale systems that store energy in huge lithium-ion batteries during low-demand periods. In times of peak demand, power providers can tap into this stored energy.

“Standalone energy storage is rapidly transforming the U.S. energy markets, because it is cheaper than new natural gas plants, faster to build than fossil peakers or transmission, and able to perform diverse energy services,” the company explains in its job postings.

Peakers are backup power plants that run on fossil fuels.

One of Plus Power’s storage facilities is the 100-megawatt Gambit project, which opened two years ago in Angleton. The nearly eight-acre facility supports power supplies for the Electric Reliability Council of Texas (ERCOT), which runs the power grid for 90 percent of Texas.

The company says the Angleton facility has fed backup energy to ERCOT during this year’s and last year’s heatwaves, as well as last December’s winter freeze.

The Gambit facility might ring a bell with some folks in the Houston area. In January 2022, Austin-based automaker Tesla unveiled a backup power storage facility in Angleton. Plus Power bought the project from Tesla in June 2022.

Plus Power’s development pipeline contains 10 gigawatts’ worth of energy storage projects in 28 states and Canada. That includes massive projects on tap for Hawaii and Arizona.

Last November, Plus Power announced it had secured $219 million in debt financing for construction of the 185-megawatt Kapolei project on a roughly eight-acre site in Oahu, Hawaii. The facility will be tied to Hawaiian Electric’s power grid. Mizuho Securities USA and KeyBank led the financing.

This April, Plus Power held a groundbreaking ceremony for the Sierra Estrella project in Tolleson, a Phoenix suburb. The 250-megawatt system will serve Salt River Project (SRP), a utility provider in the Phoenix area. The roughly 11-acre Tolleson facility is set to open next year, as is another Plus Power project for SRP — the 90-megawatt Superstition facility in Gilbert, another Phoenix suburb.

As its development pipeline demonstrates, Plus Power is firmly plugged into the fast-growing energy storage market.

According to the Houston-based energy research and consulting firm Wood Mackenzie and the American Clean Power Association, the U.S. energy storage market installed a record-breaking 4.8 gigawatts of capacity in 2022. This year, that number is projected to approach 75 gigawatts.

In a March 2023 news release, John Hensley, the clean power group’s vice president of research and analytics, says the U.S. market “is on a rapid growth curve and is already a key component of building a resilient grid that supports abundant clean energy.”

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Greentown Labs names Lawson Gow as its new Houston leader

head of hou

Greentown Labs has named Lawson Gow as its Head of Houston.

Gow is the founder of The Cannon, a coworking space with seven locations in the Houston area, with additional partner spaces. He also recently served as managing partner at Houston-based investment and advisory firm Helium Capital. Gow is the son of David Gow, founder of Energy Capital's parent company, Gow Media.

According to Greentown, Gow will "enhance the founder experience, cultivate strategic partnerships, and accelerate climatetech solutions" in his new role.

“I couldn’t be more excited to join Greentown at this critical moment for the energy transition,” Gow said in a news release. “Greentown has a fantastic track record of supporting entrepreneurs in Houston, Boston, and beyond, and I am eager to keep advancing our mission in the energy transition capital of the world.”

Gow has also held analyst, strategy and advising roles since graduating from Rice University.

“We are thrilled to welcome Lawson to our leadership team,” Georgina Campbell Flatter, CEO of Greentown Labs, added in the release. “Lawson has spent his career building community and championing entrepreneurs, and we look forward to him deepening Greentown’s support of climate and energy startups as our Head of Houston.”

Gow is the latest addition to a series of new hires at Greentown Labs following a leadership shakeup.

Flatter was named as the organization's new CEO in February, replacing Kevin Dutt, Greentown’s interim CEO, who replaced Kevin Knobloch after he announced that he would step down in July 2024 after less than a year in the role.

Greentown also named Naheed Malik its new CFO in January.

Timmeko Moore Love was named the first Houston general manager and senior vice president of Greentown Labs. According to LinkedIn, she left the role in January.

Key takeaways from HETI's Resilient Power Fueling Houston's Economy event

The View From HETI

Recently, the Resilient Power Fueling Houston’s Growing Economy workshop hosted by The Greater Houston Partnership’s Houston Energy Transition Initiative (HETI) brought together more than 80 industry, civic and innovation leaders in Houston to examine the region’s ability to meet rising demand with resilient power leadership.

The overarching message was clear: Houston is the epicenter of energy and power resilience and the “all of the above” strategy continues to position Houston well for the mission of continued economic growth for the region.

Morning highlights

Keynote speakers and panelists throughout the morning sessions highlighted that Houston’s ability to collaborate is creating real opportunities in a time of significant complexity and uncertainty in the power landscape. Discussions also focused on strategic approaches to resilience in both generation and transmission to serve growing power demand and drive economic growth over the near-term and long-term.

A successful near-term strategy highlighted in the workshop is the innovative business partnership to provide resilience for H-E-B’s retail operations with Enchanted Rock’s bridge-to-grid power solutions. The impact of growing sources of power demand was explored, including the decarbonization of industry and increasing digitization, and the essential collaborations between the energy and tech sectors to drive effective long-term power resilience and economic growth were discussed.

Notable quotes

“Public-private collaborations are the key to solve long-term power resilience problems with the technical expertise and investment capital of corporations and a right-sized local government approach” – Angela Blanchard, Chief Resilience Officer, City of Houston

"The risks and challenges in terms of our net zero power goals require both urgency and long-term focus to drive standardization across the system with speed.” – Sverre Brandsberg-Dahl, General Manager & Head of Product, Microsoft Cloud for Energy

Afternoon highlights

Afternoon sessions focused on complexities and challenges in the current power landscape, as well as policy enablers, investment trends, and innovations driving growth in Houston’s power sector. Stakeholder engagement, supply chain, permitting, and policy emerged from these discussions as key enablers for power and infrastructure investment, innovation, and project advancement.

Advancing and accelerating power and infrastructure projects will require focusing on the critical needs of land, power, and permits. Public-private investment partnerships, along with redesigned regulatory architecture and redirected government incentives, can enable and accelerate innovation and emerging technologies within the power sector.

Notable quotes

“Broad based stakeholder engagement on the ground – early and often – is necessary for the build-out of large-scale power infrastructure.” – Al Vickers, Chief Operating Officer, Grid United

“Learning curves are essential to cost curves, iterative improvement is paramount to project execution.” – Mary Dhillon, Strategy Lead, Fervo Energy

“Show us good unit economics, and we will find the capital for those power and infrastructure projects.” – Michael Johnson, Vice Chairman, Energy Transition Investment Banking, J.P. Morgan

Houston’s resilient power leadership demonstrated through a unique “all of the above” approach with a broad range of investments and collaborations across sectors is creating sustained value for businesses and development opportunities for communities. The insights shared in this workshop reinforce the critical need for resilience of the power sector to meet growing demand for continued economic prosperity in the Houston region.

As the world moves toward a future of significant power demand growth, the power sector should prioritize integrated strategies, stakeholder engagement, supply chain, permitting, and policy as key enablers for innovation, investment, and collaboration.

———

This article originally ran on the Greater Houston Partnership's Houston Energy Transition Initiative blog. HETI exists to support Houston's future as an energy leader. Power resilience is a strategic imperative for the Greater Houston Partnership, and power management continues to be a key workstream for HETI. To learn more about HETI's work in power management and resilience, connect with us at contactheti@houston.org. And for more information about HETI, EnergyCapitalHTX's presenting sponsor, visit htxenergytransition.org.

Oxy's Vicki Hollub becomes first woman to win prestigious energy award

Winning Big

Vicki Hollub, president and CEO of Houston-based Occidental (Oxy), has become the first woman to win WPC Energy’s prestigious Dewhurst Award.

Hollub is the thirteenth recipient of the award, which is considered the highest honor from WPC Energy, a global, non-advocacy, non-political nonprofit organization that promotes the sustainable management of energy and energy products. She is just the fourth U.S. winner since the award launched in 1991. Other U.S. winners include former ExxonMobil CEO Rex Tillerson; Daniel Yergin, vice chairman of S&P Global and chairman of CERAWeek; and former chairman and CEO of Chevron Kenneth Derr.

According to WPC Energy, the Dewhurst Award is given to “exceptional individuals whose leadership and contributions have had a lasting impact on the global energy industry.” It is named after Thomas Dewhurst, who organised the first WPC Energy Congress, formerly the World Petroleum Congress, in 1933.

Oxy works to advance low-carbon technologies, reduce emissions and is leading a number of energy transition projects. Its Oxy Innovation Center is housed in Houston’s The Ion.

Hollub has held a variety of roles in her 40-year career with Occidental, including chief operating officer and senior executive vice president. She also led strategic acquisitions for Occidental of Anadarko Petroleum in 2019 and CrownRock in 2024, and serves on the boards of Lockheed Martin and the American Petroleum Institute. She is one of the first women to lead a major U.S. oil and gas company.

“Vicki Hollub’s visionary leadership and unwavering dedication to innovation and sustainability have set a benchmark for excellence in our industry,” Pedro Miras, WPC Energy President, said in a news release. “She embodies the spirit of the Dewhurst Award—forward-looking, courageous and deeply committed to advancing the global energy dialogue. Her contributions continue to inspire the next generation of energy leaders.”

Hollub will receive the award in April 2026 in Riyadh, Saudi Arabia at the 25th WPC Energy Congress, where she will also present the Dewhurst Lecture.

“I am honored to be selected for the Dewhurst Award and appreciate WPC Energy recognizing our company’s achievements,” Hollub added in the release. “The Dewhurst Award reflects the collective efforts of the talented and dedicated team at Oxy, whose commitment to innovation, operational and technical excellence, and sustainability drives our success.”

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