heavy metals

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

U.S. Rep. Morgan Luttrell, a Magnolia Republican, and Hertha Metals founder and CEO Laureen Meroueh toured Hertha’s Conroe plant in August. Photo courtesy Hertha Metals/Business Wire.

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.

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A View From HETI

Fervo Energy has landed its latest accolade. Photo courtesy Fervo Energy

Houston-based geothermal power company Fervo Energy has notched a three-peat on MIT Technology Review’s annual 10 Climate Tech Companies to Watch List.

“The newly public company is betting that Al’s power boom will help turn enhanced geothermal energy into a scalable reality,” MIT Technology Review says of the three-time honoree.

Fervo went public in May through a $2.2 billion IPO.

Other Fervo recent milestones include:

“We are in the midst of a once-in-a-generation surge in power demand that is likely to dictate the outcome of the American success story in both artificial intelligence and industrial growth, but also the extent to which people have access to affordable, reliable power,” Tim Latimer, co-founder, chairman, president and CEO, said during Fervo’s second-quarter earnings call.

“The stakes have never been higher,” he added, “and I’ve never been more convinced that Fervo is uniquely positioned to meet this moment.”

Also making MIT Technology Review’s fourth annual list were:

  • Greentown Houston alum Energy Dome, based in Milan, Italy. “Energy Dome is using the gas to deliver cheap long-duration energy storage for the grid,” MIT Technology Review says.
  • Greentown Houston alum Moment Energy, based in Vancouver, Canada. “The startup is betting that repurposing — rather than recycling — used EV batteries will help buoy much-needed U.S. supply,” MIT Technology Review says.
  • Greentown Boston member Form Energy, based in Somersville, Massachusetts. It’s a three-time honoree. “Form’s 100-hour batteries could make clean energy more weather-resilient and help power data centers,” MIT Technology Review says.

Greentown Labs is an incubator for climatech and energy startups that's co-located in Houston and Boston. Fervo is also an alum of Greentown Houston.

“Whether early-stage startup or multinational corporation, the businesses we’ve chosen are working on technologies to help us address climate change or adapt to our warming world,” MIT Technology Review says. “There’s an urgent need for these innovators: We must begin to drastically reduce emissions to avoid the deadliest impacts of climate change, while also contending with its harmful effects.”

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