3 Houston-area companies named to Global Cleantech 100

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Amperon, Hertha Metals and Vaulted Deep were named to this year's Global Cleantech 100 list. Photo via Getty Images

Three Houston-area companies—Amperon, Hertha Metals and Vaulted Deep—appear on this year’s Global Cleantech 100 list.

The unranked list, generated by market intelligence and advisory firm Cleantech Group, identifies the 100 privately held companies around the world that are most likely to make a significant impact in the cleantech market over the next five to 10 years.

For the 2026 list, Cleantech Group received more than 24,000 Global Cleantech 100 nominations from nearly 60 countries. Cleantech Group scored those companies and narrowed the contenders to 264. An expert panel reviewed those nominees, and the list was whittled down to the 100 winners.

Here’s a rundown of the three Houston-area honorees:

Amperon

Founded in 2018 by Sean Kelly and Abe Stanway, Houston-based Amperon offers an AI-enabled energy forecasting and analytics platform designed to help stabilize electric grids. Amperon received undisclosed amounts of venture capital from National Grid Partners and Tokyo Gas Co. Ltd. last year and announced a recent investment from Samsung Ventures earlier this month.

Hertha Metals

Founded in 2022 by Laureen Meroueh, Conroe-based Hertha Metals provides a single-step process for producing sustainable steel. Last year, the company emerged from stealth mode and raised more than $17 million in venture capital.

Vaulted Deep

Vaulted Deep’s technology injects excess organic waste underground to remove carbon dioxide from the atmosphere. Julia Reichelstein and Omar Abou-Sayed founded the Houston-based company in 2023. Last year, the startup raised $32.3 million in venture capital. Also in 2025, Vaulted Deep signed a 12-year deal with software giant Microsoft to remove up to 4.9 million metric tons of carbon dioxide from the environment.

Vaulted Deep also made the list last year, along with Houston-based Syzygy Plasmonics and Fervo Energy. Fervo was also named the 2025 North American Company of the Year by Cleantech Group.

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Hear startup pitches, panels and fireside chats from energy transition leaders next week. Photo via Greentown Labs

What to expect from the 2025 Greentown Labs' Climatetech Summit Houston

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Greentown Labs' Climatetech Summit Houston will take place next Tuesday, Nov. 4, bringing together philanthropists, executives and innovators in the energy transition space.

John Arnold, co-founder and co-chair of Arnold Ventures, will participate in the keynote fireside chat with Greentown CEO Georgina Campbell Flatter. The conversation will explore "top priorities and opportunities in energy innovation today—with a special focus on how these dynamics are playing out in Houston," according to Greentown.

Other highlights will include:

Welcome remarks from Houston Mayor John Whitmire
A course led by TEX-E Executive Director Sandy Guitar
A philanthropy panel featuring Greentown Labs new Head of Philanthropy Stacey Harris
The Energy Jobs of the Future, featuring Sameer Bandhu, GE Vernova’s managing director, ventures and licensing
An Energy-transition Roadmap, featuring Monica Krishnan, Hermann Lebit and Bobby Tudor and moderated by Varun Rai
What is Climatetech? featuring Kyle Judah, Emerson Denka Wangdi, Laureen Meroueh and Head of Greentown Houston Lawson Gow

Ten Greentown Labs startups will also present their pitches at the event. Expect to hear from:

MCatalysis Inc. CEO, President, and Founder Michael D. Irwin. Dallas-based MCatalysis develops novel, high-efficiency industrial microwave processes and catalysts to produce low-cost, clean synthetic fuels and chemicals from waste carbon resources.
Pike Robotics CEO and co-founder Connor Crawford. Austin-based Pike Robotics provides next-gen robotic solutions for in-service inspection of floating roof storage tanks.
Helix Earth CEO and co-founder Rawand Rasheed. Houston-based Helix Earth retrofits commercial HVAC systems to improve energy efficiency.
10DQ CEO Steven Reece. Greentown Boston member 10DQ has developed its Redox Loop Battery, which uses novel, water-based electrolytes to store energy in dense, low-cost, earth-abundant battery materials.
Janta Power CEO Mohammed Njie. Dallas-based Janta Power is developing 3D solar towers.
Neuralix business operations and product developer Annorah Lewis. Houston-based Neuralix offers a suite of rapid, customizable templates for the data lifecycle for the energy and manufacturing sectors.
Ententia co-founder Nishant Shah. Houston-based Etenitia develops enterprise AI platforms and systems that use domain expertise, rich multi-modal industrial datasets, and generative AI technology to power more effective and efficient business workflows.
Locoal CEO Miles Murray. Boerne, Texas-based Locoal is a waste-to-energy company that has developed a proprietary mobile containerized fluidized gasifier that diverts waste, converts it to clean energy and captures carbon in value-added co-products.
SpiralWave co-founder Adam Amad. San Francisco-based SpiralWave has developed novel electrochemical carbon capture technology that lowers costs.
Biatech founder and CEO Nathan Hartwig. Tampa-based Biatech has built an application-layer AI platform to help energy, mining and infrastructure operators optimize asset performance, reduce risk and improve decision-making.

In addition to the startup pitches, attendees will also be able to meet founders and Greentown members during the afternoon startup showcase. A networking reception at Axelrad Houston follows. A separate ticket offers admission to the showcase and networking event only.

See the full agenda here.

20-plus companies will pitch at Energy Tech Nexus' Pilotathon during Houston Energy & Climate Startup Week. Photo via Getty Images.

Energy Tech Nexus announces international startups to pitch at Pilotathon

Ready, Set, Pitch

Energy Tech Nexus will host its Pilotathon and Showcase as part of Houston Energy & Climate Startup Week next Tuesday, Sept. 16, featuring insightful talks from industry leaders and pitches from an international group of companies in the clean energy space.

This year's event will center around the theme "Energy Access and Resilience." Attendees will hear pitches from nine Pilotathon pitch companies, as well as the 14 companies that were named to Energy Tech Nexus' COPILOT accelerator earlier this year.

COPILOT partners with Browning the Green Space, a nonprofit that promotes diversity, equity and inclusion (DEI) in the clean energy and climatetech sectors. The Wells Fargo Innovation Incubator (IN²) at the National Renewable Energy Laboratory backs the COPILOT accelerator, where companies are tasked with developing pilot projects for their innovations.

The nine Pilotathon pitch companies include:

Ontario-based AlumaPower, which has developed a breakthrough technology that converts the aluminum-air battery into a "galvanic generator," a long-duration energy source that runs on aluminum as a fuel
Calgary-based BioOilSolv, a chemical manufacturing company that has developed cutting-edge biomass-derived solvents
Atlanta-based Cultiv8 Fuels, which creates high-quality renewable fuel products derived from hemp
Newfoundland-based eDNAtec Inc., a leader in environmental genomics that analyzes biodiversity and ecological health
Oregon-based Espiku Inc., which designs and develops water treatment and mineral extraction technologies that rely on low-pressure evaporative cycles
New York-based Fast Metals Inc., which has developed a chemical process to extract valuable metals from complex toxic mine tailings that is capable of producing iron, aluminum, scandium, titanium and other rare earth elements using industrial waste and waste CO2 as inputs
New Jersey-based Metal Light Inc., which is building a circular, solid metal fuel that will serve as a replacement for diesel fuel
Glasgow-based Novosound, which designs and manufactures innovative ultrasound sensors using a thin-film technique to address the limitations of traditional ultrasound with applications in industrial, medical and wearable markets
Calgary-based Serenity Power, which has developed a cutting-edge solid oxide fuel cell (SOFC) technology

The COPILOT accelerator companies include:

Accelerate Wind
Aquora Biosystems Inc.
EarthEn
Electromaim
EnKoat
GeoFuels
Harber Coatings Inc.
Janta Power
NanoSieve
PolyQor Inc.
Popper Power
Siva Powers America
ThermoShade
V-Glass Inc.

Houston-area sustainable steel company emerges from stealth with $17M in VC funding

heavy metals

Conroe-based Hertha Metals, a producer of substantial steel, has hauled in more than $17 million in venture capital from Khosla Ventures, Breakthrough Energy Fellows, Pear VC, Clean Energy Ventures and other investors.

The money has been put toward the construction and the launch of its 1-metric-ton-per-day pilot plant in Conroe, where its breakthrough in steelmaking has been undergoing tests. The company uses a single-step process that it claims is cheaper, more energy-efficient and equally as scalable as conventional steelmaking methods. The plant is fueled by natural gas or hydrogen.

The company, founded in 2022, plans to break ground early next year on a new plant. The facility will be able to produce more than 9,000 metric tons of steel per year.

Hertha said in a news release that its process, which converts low-grade iron ore into molten steel or high-purity iron, “doesn’t just materially lower cost and energy use — it fundamentally expands our capacity to produce iron and steel at scale, by unlocking a wider range of iron ore feedstocks.”

Laureen Meroueh, founder and CEO of Hertha, says the company’s process will fill a gap in U.S. steel production.

“We’re not just reinventing steelmaking; we’re redefining what’s possible in materials, manufacturing, and national resilience,” Meroueh says.

Hertha says it’s in talks with magnet producers — which make permanent magnets and magnetic assemblies from raw materials such as iron — to become a U.S. supplier of high-purity iron. In its next stage of growth, Hertha will aim to operate at a capacity of 500,000 metric tons of steel production per year.

The company won the Department of Energy's Summer Energy Program for Innovation Clusters (EPIC) Startup Pitch Competition last summer. Read more here.

Hertha Metals, based in Conroe, won first place at the 2024 Summer Energy Program for Innovation Clusters (EPIC) Startup Pitch Competition. Photo via DOE

Houston-area energy tech startup wins DOE competition's $100,000 prize

1st place

Four startups from across the country won over $160,000 in cash prizes from the U.S. Department of Energy’s Office of Technology Transitions earlier this month, and a Houston-area company claimed the top prize.

Hertha Metals, based in Conroe, won first place at the 2024 Summer Energy Program for Innovation Clusters (EPIC) Startup Pitch Competition. The program honors and supports clean energy innovators nominated by clean technology business incubators.

“The EPIC Pitch Competition is a unique opportunity for start ups to highlight their technology, get on the main stage, and receive direct funding,” DOE Chief Commercialization Officer and Director of OTT Vanessa Chan says in a news release. “The startup pitch winners have honed their entrepreneurial skills and demonstrated a critical understanding of their technological impacts, targeted markets, and scalable strategies.”

Focused on environmentally responsible steel, Hertha Metals won the $100,000 prize. The company's steelmaking process reduces emissions by 95 percent, per the news release, while remaining financially accessible. Hertha Metals was nominated by Greentown Labs, which won $25,000 for its nomination.

The program's other 2024 winners included:

Daytona Beach, Florida-based Sensatek Propulsion Technology Inc., which won second place and $40,000 and was nominated by mHUB Innovation Center
Arlington, Virginia-based Torev Motors, which won third place and $20,000 and was nominated by Dominion Energy Innovation Center
Fort Collins, Colorado-based NitroCat Energies, which won the a $5,000 Justice, Equity, Diversity, and Inclusion (JEDI) Prize and was nominated by Colorado State University

Hertha Metals was founded by Laureen Meroueh, a mechanical engineer and materials scientist, in 2022. A Greentown Houston member, the company is also currently in the inaugural cohort of the Breakthrough Energy Innovator Fellows.

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Houston trio lands on Time’s list of 10 most influential energy companies

making an impact

Three companies with headquarters in Houston made Time magazine’s new list of the 10 most influential energy companies.

The unranked list includes:

Houston-based oil and gas giant Chevron
Houston-based Fervo Energy, a geothermal power provider that just went public in a $1.9 billion IPO
Saudi Aramco, the world’s largest oil company, whose U.S. headquarters is in Houston

In naming Chevron to the list, Time cites the company’s standing as the only major American oil company operating in Venezuela. Time says Chevron wields “extraordinary power” over Venezuela’s massive oil reserves.

Despite pressure from the White House on U.S. oil and gas producers to ramp up investments in Venezuela, “Chevron has pumped the brakes, pledging to boost output gradually and not chase price fluctuations,” Time says.

“Chevron has been in Venezuela for over a century,” CEO Mike Wirth told shareholders in January. “We remain committed to leveraging our deep expertise and long-standing partnerships for the benefit of our shareholders and the people of Venezuela.”

Time points out that Fervo sits “at the front of the pack” in generation of geothermal energy. The Houston-based company uses fracking techniques borrowed from the oil and gas industry to create underground hot-rock reservoirs that heat water to generate electricity.

Fervo’s Cape Station in Utah is scheduled to start delivering power to the grid this year. At full capacity of 500 megawatts, it will be the first large-scale commercial geothermal plant in the U.S. Time says another site in Utah, Project Blanford, is Fervo’s hottest well yet, highlighting the potential for harnessing geothermal heat for at-scale clean energy.

“It’s hard to find something that can [deliver] reliable 24/7 energy, that’s carbon-free, and can be constructed in a timely manner,” Fervo CEO Tim Latimer said. “It’s energy without a lot of the compromises.”

Government-owned Saudi Aramco, which last year earned $104.7 billion in profit, not only is a dominant player in the Mideast oil and gas sector, but Time says it holds “global clout in politics and business” that reaches far beyond oilfields. For example, the company finances big projects spearheaded by Crown Prince Mohammad Bin Salman, who chairs Saudi Arabia’s sovereign wealth fund. These include initiatives in global sports, tourism, and AI.

Baker Hughes teams up with Oklahoma co. to advance geothermal development

geothermal partnership

In recent months, Houston-based energy corporation Baker Hughes has launched multiple partnerships to expand geothermal energy extraction across the United States. The latest, a deal with Oklahoma-based Helmerich & Payne Inc. (H&P), was announced Wednesday.

As part of the deal, H&P will provide a geothermal-capable land drilling rig, while Baker Hughes will contribute technology and expertise. The rig is expected to be deployed later this year, according to a news release.

“Geothermal energy plays a critical role in meeting growing power demand by providing clean, reliable baseload generation,” Amerino Gatti, executive vice president of oilfield services & equipment for Baker Hughes, said in the release. “This collaboration reflects a deliberate step to move its development in the U.S. from concept to reality. By working together, Baker Hughes and Helmerich & Payne are helping customers advance these critical energy projects with greater confidence and deliver reliable, sustainable power.”

Investment in the geothermal energy sector is currently exploding in the U.S., having grown by at least 1,000 percent just in the last seven years, according to a recent report by Rocky Mountain Institute.

On one hand, only about 1 percent of the American energy grid currently uses geothermal, but on the other, the U.S. holds roughly 25 percent of the world’s geothermal capacity. Harnessing that power becomes even more attractive as conflicts in Russia and Iran continue to hamstring energy markets from those countries and revitalize interest in renewable energy.

Baker Hughes has been at the forefront of the geothermal boom. This new deal with H&P combines H&P’s drilling platform technology with Baker Hughes’s subsurface and energy extraction support technologies.

“This agreement underscores Helmerich & Payne’s commitment to supporting emerging energy opportunities through our drilling technologies and operational expertise,” H&P President and CEO Trey Adams added in the release. “We are pleased to collaborate with Baker Hughes to support the advancement of geothermal development in the United States.”

The deal with H&P is just one of several recent ones Baker Hughes has closed. In March, they announced support for XGS’s geothermal extraction projects in New Mexico, which are being used to meet the increasing demands of data centers in the state. Last May, Fervo Energy selected Baker Hughes to supply equipment for its flagship geothermal project in Utah.

Houston renewables developer signs agreement with Meta for new solar project

power deal

Houston-based EDP Renewables North America has signed a long-term power purchase agreement with Meta, the parent company of Facebook and Instagram, for its forthcoming Cypress Knee Solar project.

The 250‑megawatt solar project will be built in Arkansas and is expected to come online by 2028, according to a news release from EDPR. The company says the project will generate approximately $25 million in new revenue for Chicot County once operational.

“Cypress Knee Solar and our broader portfolio of projects with Meta are helping power a reliable, modern U.S. electric grid—the backbone of American innovation and long-term economic growth,” Sandhya Ganapathy, CEO of EDPR NA, said in the release. “These investments strengthen local communities, create durable economic value, and ensure that progress is built on a resilient, sustainable foundation.

This is Meta's third power purchase agreement with EDPR. The tech giant is now contracted to a renewable capacity of 545 megawatts with EDPR. Meta and EDPR also collaborated on the 200-megawatt Brittlebush Solar Park to support Meta's data center in Mesa, Arizona.

“Through our partnership with EDPR, Cypress Knee Solar will bring new generation to the Arkansas grid, creating local jobs and delivering economic benefits to the community. We’re proud to expand our collaboration with EDPR,” Amanda Yang, head of clean and renewable energy at Meta, added in the release.

EDPR operates 61 wind farms, 29 solar parks and four energy storage sites across North America. Its other customers include other tech companies like Amazon and Microsoft.

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