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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Vaulted Deep, which diverts sludgy organic waste from landfills or waterways and captures and stores carbon emissions generated, is getting off the ground with $8 million from investors. Photo via Getty Images

Houston company's sustainable spinoff launches with $8M in seed funding

vaulted with capital

Houston-based Advantek Waste Management Services, which specializes in deep-injection wells that minimize the impact of land, air, and water waste, has launched a carbon removal and storage company.

The spinoff, Vaulted Deep, is getting off the ground with $8 million in seed funding.

Vaulted diverts sludgy organic waste, such as agricultural and livestock waste, before it’s dumped in a landfill or waterway or simply left on land to decompose. It then captures and stores carbon emissions generated by the organic waste.

A study published earlier this year by Louisiana State University ecologist Brian Snyder estimated that organic waste generates five gigatons of carbon dioxide per year. A gigaton equals one billion metric tons.

Vaulted is already off to an impressive start. For one thing, the startup has raised an $8 million seed round led by New York City-based carbon removal fund Lowercarbon Capital. Other investors include Advantek and San Francisco-based climatech VC fund Earthshot Ventures.

In addition, Vaulted has already nailed down purchase commitments from Frontier, a marketplace for buyers and sellers of carbon removal credits. Ryan Orbuch, a partner at Lowercarbon, is one of Frontier’s strategic advisers.

“Vaulted is literally cleaning up the planet, scaling field-proven injection terminology to safely dispose of harmful wastes like biosolids while permanently storing away millions of tons of CO2,” Orbuch says in a Vaulted news release.

While injection sequestration sites often take years to gain permits and start operating, Vaulted already boasts two permitted sites that are up and running. Vaulted offers carbon removal for $300 per ton, compared with more than $500 per ton charged by some competitors.

Advantek founder Omar Abou-Sayed is switching from CEO to chairman of Advantek, which launched in 1999, and will serve as executive chairman of Vaulted. Julia Reichelstein, a former investor at San Francisco-based climatech VC fund Piva Capital, has been tapped as CEO of Vaulted.

“Unlike many carbon removal technologies still in R&D, Vaulted’s technology and sites can safely and permanently store carbon underground, at scale, today,” says Abou-Sayed. “The early removals we will deliver are pivotal to keeping the window open to hold our planet’s warming below 1.5 degrees Celsius.”

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Solidec secures pre-seed funding from Houston VC firm

fresh funding

Houston-based Flathead Forge Fund 1 has invested in Houston startup Solidec, which specializes in modular onsite chemical manufacturing.

The investment was part of Solidec’s recent round of more than $2 million in pre-seed funding. The amount of Flathead Forge’s investment wasn’t disclosed.

“Flathead Forge brings exactly the kind of domain-specific capital and operational network that a company at our stage needs. Their focus on water and critical minerals makes this a genuinely strategic relationship,” Ryan DuChanois, co-founder and CEO of Solidec, said in a news release.

Other investors in the round included New Climate Ventures, Collaborative Fund, Echo River Capital, Ecosphere Ventures, Plug and Play Ventures, Safar Partners and Semilla Climate Capital.

Solidec produces industrial chemicals, including hydrogen peroxide, formic acid and acetic acid, using only air, water and electricity. Its modular reactors eliminate the need for energy-intensive production and long-haul distribution.

“Solidec’s platform cuts cost, emissions, and supply-chain fragility at the source,” Douglas Lee, managing director of Flathead Forge, added in the statement.

DuChanois said in an email that the company plans to use the funding to "scale (its) modular chemical manufacturing platform."

Solidec recently announced a pilot project with Lynas Rare Earths, the world’s only commercial producer of separated light and heavy rare earth oxides outside China, for production of hydrogen peroxide for a Lynas facility in Australia.

Solidec, a member of Greentown Labs Houston, spun out of associate professor Haotian Wang’s lab at Rice University in 2024. Wang focuses on developing new materials and technology for energy and environmental uses, such as energy storage and green synthesis.

Greentown Labs names new COO, appoints new Head of Houston

new leaders

Greentown Labs has reshuffled its leadership, elevating Houston leaders into new roles.

Lawson Gow was named COO of the Houston- and Boston-based climatech incubator in February 2026. In his new role, he will focus on optimizing Greentown's structure, building new internal and external systems and developing a plan for growth.

Gow was named Head of Houston in July. He previously founded The Cannon, a coworking space with eight 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.

Kelsey Kearns, who previously served as Director of Community Strategy at Greentown, was named as Gow's replacement in the Houston-focused role. As the new Head of Houston, she will lead daily operations, work to connect the city's climate and innovation ecosystem and founders, strengthen partnerships and accelerate solutions.

"I'm honored and grateful to step into this new role," Kearns said in an email. "My goal is for Greentown to thrive so our founders can thrive! That means supporting their connection to the capital, pilots, and customers they need to grow while building partnerships across Houston's innovation ecosystem. I want Greentown Houston to become the playbook for every future Greentown expansion."

Before joining Greentown Houston, Kearns served as director of business development at Howdy.com, an Austin-based technology staffing company.

"Kelsey is such a perfect fit to lead Greentown Houston," Gow added in an email. "She's deeply passionate about the entrepreneurial community here and has worked throughout and across the ecosystem for years. She's built an awesome dream team here and has helped reinvigorate Greentown's presence and role in Houston's innovation economy."

Earlier this year, Greentown also named Julia Travaglini as the Head of its Boston incubator. Travaglini has held multiple leadership roles at Greentown since 2016. The organization named Georgina Campbell Flatter as its new CEO in early 2025.

Texas sees 5th highest surge in gas prices in the U.S. since 2025

Pay at the Pump

Residents all around Texas are seeing soaring prices for regular and diesel fuel in 2026.

In fact, the Lone Star State has seen the fifth-highest percentage increase in gas prices in the country from April 2025 to April 2026, a just-released SmartAsset study has found. The current cost of a regular gallon of gas is 36.1 percent higher now than it was a year ago, and diesel is 60.9 percent more expensive.

The report, "Gas Prices Hit Records in 2026: State by State Breakdown," compared average gas prices from AAA from April 1, 2025 and April 1, 2026 and calculated the one-year change across all 50 states. The study looked at the price of a gallon of regular, premium, and diesel.

According to AAA, the cost of a regular gallon of gas in Texas at the start of April was $3.77, while premium is $4.62 per gallon. Diesel ticked over $5 a gallon — ouch — at $5.11.

Houston gas prices aren't much cheaper than the statewide average. A gallon of regular costs up to $3.76 at some Houston-area pumps, and diesel is $5.05 per gallon. AAA says the highest recorded average price for gas in the city was in June 2022, when a gallon of regular cost $4.68 and diesel cost $5.24.

Though Texas' gas prices are continuing to climb, it ranks 35th in the national ranking of states with the highest cost for regular gas as of April 2026. Texas' diesel prices are the 14th highest nationwide.

With the national average price for gas at $4.06, SmartAsset said the sudden surge in prices can be attributed to the United States' war on Iran, and "subsequent pressure on the Strait of Hormuz."

"Many states have experienced a 33 percent year-over-year increase in the cost of a gallon of regular gas – and in some places it’s even higher," the report's author wrote. "Commercial and public programs may be feeling similarly pinched, with diesel prices upwards of $6.00 per gallon in many states."

California currently has the highest average price for regular and diesel — $5.89 per gallon and $7.52 per gallon, respectively.

Arizona leads the nation with the highest one-year increase in gas prices. Regular gas in the Grand Canyon State is nearly 38 percent more expensive than it was last year, at $4.70 per gallon, and diesel is about 69 percent higher at $6.04 for a gallon.

The state with the cheapest gas prices in April is Oklahoma, where regular costs $3.27 per gallon, premium is $3.97, and diesel is $4.49.

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This article originally appeared on CultureMap.com.

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