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Show me the money: Top Houston energy transition funding, investment news from 2024

year in review

Here were this year's most-read funding news stories on EnergyCapital. Photo via Getty Images

Editor's note: As the year comes to a close, EnergyCapital is looking back at the year's top stories in Houston energy transition. From firms with fresh funding to deploy to energy tech companies to startups raising venture capital investment, Houston has some wins to celebrate this year when you follow the money. Here were the top five most-read articles — according to EnergyCapital reporting — covering investment deals of 2024. Be sure to click through to read the full story.

Houston PE firm unveils oversubscribed $450M fund to advance nuclear power innovation

Pelican Energy Partners has raised more than it intended with its new nuclear-focused fund. Photo via Getty Images

Houston-based private equity firm Pelican Energy Partners has raised a $450 million fund to invest in nuclear energy services and equipment companies.

Pelican had aimed to raise $300 million for Pelican Energy Partners Base Zero LP and had imposed an initial “hard cap” of $400 million. Investors include endowments, foundations, family offices, and pension plans.

As of the fund’s closing date, the fund had wrapped up six investments, with several more deals expected to close by the end of this year. Continue reading.

Robotics co. with growing Houston presence closes series B

The advanced submersible robotics company will put the funds toward international expansion. Photo courtesy of Square Robot

Houston- and Boston-based Square Robot Inc. closed a series B round of funding last month.

The advanced submersible robotics company raised $13 million, according to Tracxn.com, and says it will put the funds toward international expansion.

"This Series B round, our largest to date, enables us to accelerate our growth plans and meet the surging global demand for our services,” David Lamont, CEO, said in a statement. Continue reading.

Houston industrial decarbonization-focused PE firm scores $725M to launch new business unit

HF Capital, the Knoxville, Tennessee-based investment arm of the Haslam family, made the multimillion-dollar commitment to set up Ara Energy Decarbonization. Photo via arapartners.com

Houston-based Ara Partners, a private equity firm that focuses on industrial decarbonization investments, is receiving up to $725 million from a Tennessee-based family office to launch an energy decarbonization unit.

HF Capital, the Knoxville, Tennessee-based investment arm of the Haslam family, made the multimillion-dollar commitment to set up Ara Energy Decarbonization. The new business will work toward reducing carbon emissions at ethanol plants, natural gas power plants, and other traditional energy assets.

The Haslam family founded Pilot Co., North America’s largest transportation fuel business and chain of travel centers. Shameek Konar, former CEO of Pilot, has been tapped to lead Ara Energy Decarbonization. Continue reading.

Houston-based clean energy site developer raises $300M to decarbonize big tech projects

As emerging technology continues to grow electricity load demand, Cloverleaf has identified an opportunity to develop large-scale digital infrastructure sites powered by low-carbon electricity. Photo via Getty Images

Houston energy executives have started a new company dedicated to developing clean-powered infrastructure for the large electric loads.

Cloverleaf Infrastructure, dually headquartered in Houston and Seattle, Washington, announced its launch and $300 million raised from NGP and Sandbrook Capital, two private equity firms. The company's management team also invested in the company.

As emerging technology continues to grow electricity load demand, Cloverleaf has identified an opportunity to develop large-scale digital infrastructure sites powered by low-carbon electricity.

"The rapid growth in demand for electricity to power cloud computing and artificial intelligence poses a major climate risk if fueled by high-emission fossil fuels," David Berry, Cloverleaf's CEO, says in a news release. "However, it's also a major opportunity to catalyze the modernization of the US grid and the transition to a smarter and more sustainable electricity system through a novel approach to development." Continue reading.

Investors from Houston and Boston fuel Greentown with $4M commitment

A mix of public and private investors have funded Greentown Labs. Photo via GreentownLabs.com

Greentown Labs, a climatetech incubator with locations in the Houston and Boston areas, has announced it has received funding from a mix of investors.

The $4 million in funding came from both of the Houston and Massachusetts locations. Houston investors included Bobby Tudor, CEO of Artemis Energy Partners and chairman of the Houston Energy Transition Initiative; David Baldwin, co-founder of OpenMinds and TEX-E and partner at SCF Partners; and Rice University. Other investors included MassDevelopment and the City of Somerville.

“The challenges of the energy transition are immense, and the role played by technology incubators like Greentown Labs is essential,” Tudor says in a news release. “We believe this role, which is a partnership between academia, industry, philanthropists, entrepreneurs, and governments, is the best way to get to effective, scalable solutions in a time frame that the urgency of the challenge requires. We need all hands on deck, and this partnership between Massachusetts and Texas can be a role model for others.” Continue reading.

With the deal, Midland, Texas-based Cottonmouth will make a $50 million equity investment into Houston-based Verde. Image via Shutterstock

Houston clean fuels co. secures $50M investment from Diamondback Energy subsidiary

money moves

Verde Clean Fuels announced the entry into a stock purchase agreement with Cottonmouth Ventures, a wholly-owned subsidiary of Diamondback Energy.

With the deal, Midland, Texas-based Cottonmouth will make a $50 million equity investment into Houston-based Verde.

The investment will consist of the purchase of 12.5 million shares of Verde’s Class A common stock at a purchase price of $4.00 per share. Closing of the investment is anticipated to occur during the first quarter of the new year, which will be subject to satisfaction of customary closing conditions. The investment would represent the second investment by Cottonmouth in Verde over the past two years, which would equal a total investment of $70 million. This would make Cottonmouth the second largest shareholder of Verde.

“We are pleased to further our relationship with Diamondback and continue advancing our plans to deploy our technology through the development of commercial production plants,” Ernest Miller, CEO of Verde, says in a news release. “Diamondback is a strategic industry partner at the forefront of bringing sustainable operational practices to the oilfield and supporting the overall transition to clean energy.”

Verde Clean Fuels key pioneering technology is its "syngas-to-gasoline plus" (STG+®), which turns diverse feedstocks like biomass, municipal solid waste (MSW), and natural gas – into gasoline or methanol. Verde is able to deploy facilities in areas with abundant and low-cost feedstock. The company has developed two different pathways to gasoline production with the goal of reducing carbon emissions.

Proceeds from the investment are expected to be used to further the development and construction of potential “natural gas-to-gasoline production plants in the Permian Basin and for other general corporate purposes,” according to Verde Clean Fuels. The proposed plants developed by the parties would produce fully-refined gasoline utilizing Verde’s patented STG+® process from associated natural gas feedstock supplied from Diamondback's operations in the Permian Basin. Verde will also expand its board of directors to eight members and appoint a new director to be designated by Cottonmouth. Cottonmouth will be entitled to appoint an observer to the company’s board.

“This investment is an expression of confidence in our technology, which we believe has the potential to alleviate economic and environmental concerns in the Permian Basin and other pipeline-constrained basins, where flaring and stranded natural gas represent a significant challenge,” Miller adds in the release.

U.S. Congressman Jake Ellzey made the announcement in Dallas last week. Photo courtesy of Google

Google to invest $1B in clean energy, data center tech in Texas

money moves

Google is making a big investment in Texas to the tune of $1 billion.

According to a news release from the company, the tech giant will spend more than $1 billion to support its cloud and data center infrastructure and expand its commitment to clean energy.

The $1 billion will be spent on data center campuses in Midlothian and Red Oak to help meet growing demand for Google Cloud, AI innovations, and other digital products and services such as Search, Maps, and Workspace.

In addition to its data center investment, Google has also forged long-term power purchase agreements with Houston-based Engie, as well as Madrid-based entities Elawan, Grupo Cobra, and X-ELIO for solar energy based in Texas. Together, these new agreements are expected to provide 375 MW of carbon-free energy capacity, which will help support Google’s operations in Texas.

These agreements were facilitated through LEAP (LevelTen Energy’s Accelerated Process), which was co-developed by Google and LevelTen Energy to make sourcing and executing clean energy PPAs more efficient, and contributes to the company’s ambitious 2030 goal to run on 24/7 carbon-free energy on every grid where it operates.

The company has contracted with energy partners to bring more than 2,800 megawatts (MW) of new wind and solar projects to the state. Google’s CFE percentage in the ERCOT grid region, which powers its Texas data centers, nearly doubled from 41 percent in 2022 to 79 percent in 2023.

The initiatives were announced at a conference in Midlothian on August 15, attended by business leaders and politicians including U.S. Congressman Jake Ellzey, Google Cloud VP Yolande Piazza, Ted Cruz, and Citi CIO Shadman Zafar.

The Dallas cloud region is part of Google Cloud's global network of 40 regions that delivers services to large enterprises, startups, and public sector organizations.

In a statement, Piazza said that "expanding our cloud and data center infrastructure in Midlothian and Red Oak reflects our confidence in the state's ability to lead in the digital economy."

Data centers are the engines behind the growing digital economy. Google has helped train more than 1 million residents in digital skills through partnerships with 590 local organizations, including public libraries, chambers of commerce, and community colleges.

In addition to its cloud region and Midlothian data center, Google has offices in Austin, Dallas, and Houston. The new Google’s total investment in Texas to more than $2.7 billion.

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This article originally ran on CultureMap.

Tyler Lancaster, a Chicago-based investor with Energize Capital, shares his investment thesis and why Houston-based Amperon caught his eye. Photo courtesy of Energize Capital

Investor on Texas as a climatetech hub, disruption opportunities with the grid, and more

Q&A

One of the biggest challenges to the energy transition is finding the funds to fuel it. Tyler Lancaster, partner at Energize Capital, is playing a role in that.

Energize Capital, based in Chicago, is focused on disruptive software technology key to decarbonization. One of the firm's portfolio companies is Amperon, which raised $20 million last fall.

In an interview with EnergyCapital, Lancaster shares what he's focused on and why Amperon caught Energize Capital's attention.

EnergyCapital: Energize Capital has been investing in climate tech for the better part of a decade now. What types of companies are you looking for and how are these companies’ technologies affecting the greater energy transition?

Tyler Lancaster: We partner with best-in-class innovators to accelerate the sustainability transition. This means identifying climate technology companies at various stages of maturity — from early commercialization to approaching the public markets — that we can help scale and realize their full potential. We invest in software-first climate technology businesses, with a focus on asset-light digital solutions that can help scale sustainable innovation and enable the new energy economy. Our portfolio currently drives software applications across renewable energy, industrial operations, electrification & mobility, infrastructure resilience, and decarbonization. We primarily focus on proven, commercially available and economically viable energy transition solutions (solar, wind, batteries, heat pumps, etc.). These solutions suffer from challenges related to efficient deployment or operations, where enabling digital platforms can play a key role in optimizing costs.

EC: Amperon is one of Energize Capital's portfolio companies. What made the company a great investment opportunity for Energize Capital?

TL: Accelerating the energy transition will require critical forecasting tools like what Amperon provides. This is underscored by the escalating impact of extreme weather events, increasing penetration of variable energy resources, like wind and solar, on the supply side, and surging demand growth driven by flexible loads and rapid electrification. We believe the need for Amperon’s platform will only continue to grow, and their increased raise from Series A to Series B showed they are scaling smartly. We’ve also known Sean Kelly, Abe Stanway, and the entire Amperon team for a long time, and building strong relationships with founders is how we like to do business. Amperon has built a blue-chip customer base in the energy sector in a very capital efficient manner, which is more important than ever for startups operating in the current equity market environment.

EC: One of the energy transition’s biggest problems is sourcing and storing reliable and affordable energy. What have you observed are the biggest problems with Texas’ electricity grid and what types of new tech can help improve these issues?

TL: Today’s electricity grid and the demands we’re putting on it look very different than they ever have. Major changes in climate and extreme weather show how perilous and unreliable the power grids in this country are, particularly in regions like Texas that don’t have the right infrastructure to shield grids from unusual temperatures — just look at the damage done by 2021’s historic Winter Storm Uri. And consumer demand for electricity is increasing as electrification accelerates globally. The makeup of the grid itself is shifting from centralized power plants to distributed clean energy assets like solar arrays and wind turbines, which brings issues of intermittent electricity production and no traditional way to forecast that.

Tech solutions like Amperon are the only way to navigate the nuances of the energy transition. With global net-zero goals and impending Scope II accounting, Amperon’s expertise in granular data management further enables companies to build accurate, dynamic forecasting models with smart meter data and get more visibility into anticipated market shifts so they can optimize their energy use — all of which helps to create a more resilient and reliable power grid.

EC: You are also on the board of the company, which recently announced a collaboration with Microsoft’s tech. What doors does this open for Amperon?

TL: Partnering with Microsoft and offering its energy demand forecasting solution on the Azure platform enables Amperon to better serve more companies that are navigating the energy transition and a rapidly evolving grid. Many power sector companies are also undergoing cloud migrations with Microsoft Azure having high market share. This partnership will specifically accelerate Amperon’s reach with utility customers, who typically have slower sales cycles but can greatly benefit from improved accuracy in energy demand forecasting and adoption of AI technologies.

EC: As a non-Texas investor, how do you see Houston and Texas-based companies’ investability? Has it changed over the years?

TL: While most tech startups are concentrated on the coasts and in Europe, we see Texas emerging as a hub for energy and climate focused startups due to its vicinity to energy giants, which represent potential customers. Texas leads the country in renewable energy production and sits at the forefront of the transition. Energy companies based in this region are relying on technology innovation and software tools to modernize operations and meet the evolving demands of their customers.

———

This conversation has been edited for brevity and clarity.

A Houston investor is looking to target high-potential hardtech startups within the energy transition with his new venture studio. Photo via Getty Images

Houston investor launches energy transition venture studio to help elevate early-stage hardtech startups

money moves

The way Doug Lee looks at it, there are two areas within the energy transition attracting capital. With his new venture studio, he hopes to target an often overlooked area that's critical for driving forward net-zero goals.

Lee describes investment activity taking place in the digital and software world — early stage technology that's looking to make the industry smarter. But, on the other end of the spectrum, investment activity can be found on massive infrastructure projects.

While both areas need funding, Lee has started his new venture studio, Flathead Forge, to target early-stage hardtech technologies.

“We are really getting at the early stage companies that are trying to develop technologies at the intersection of legacy industries that we believe can become more sustainable and the energy transition — where we are going. It’s not an ‘if’ or ‘or’ — we believe these things intersect,” he tells EnergyCapital.

Specifically, Lee's expertise is within the water and industrial gas space. For around 15 years, he's made investments in this area, which he describes as crucial to the energy transition.

“Almost every energy transition technology that you can point to has some critical dependency on water or gas,” he says. “We believe that if we don’t solve for those things, the other projects won’t survive.”

Lee, and his brother, Dave, are evolving their family office to adopt a venture studio model. They also sold off Azoto Energy, a Canadian oilfield nitrogen cryogenic services business, in December.

“We ourselves are going through a transition like our energy is going through a transition,” he says. “We are transitioning into a single family office into a venture studio. By doing so, we want to focus all of our access and resources into this focus.”

At this point, Flathead Forge has seven portfolio companies and around 15 corporations they are working with to identify their needs and potential opportunities. Lee says he's gearing up to secure a $100 million fund.

Flathead also has 40 advisers and mentors, which Lee calls sherpas — a nod to the Flathead Valley region in Montana, which inspired the firm's name.

“We’re going to help you carry up, we’re going to tie ourselves to the same rope as you, and if you fall off the mountain, we’re falling off with you,” Lee says of his hands-on approach, which he says sets Flathead apart from other studios.

Another thing that's differentiating Flathead Forge from its competition — it's dedication to giving back.

“We’ve set aside a quarter of our carried interest for scholarships and grants,” Lee says.

The funds will go to scholarships for future engineers interested in the energy transition, as well as grants for researchers studying high-potential technologies.

“We’re putting our own money where our mouth is,” Lee says of his thesis for Flathead Forge.

The undisclosed amount of funding will be used to continue Syzygy's work on it commercial-scale photoreactor. Photo via Syzygy

Houston cleantech co. secures investment from Mitsubishi

money moves

A Houston-based company that's created a photocatalytic reactor that uses light instead of heat to cleanly manufacture chemicals has announced its latest investor.

Syzygy Plasmonics announced a strategic investment agreement with Mitsubishi Heavy Industries Ltd., executed through Mitsubishi Heavy Industries America Inc. The terms of the deal were not disclosed, but Syzygy reports that the funding will go toward commercialization and development of its products.

"MHIA has been making moves to establish themselves as one of the leaders in the energy transition," Syzygy CEO Trevor Best says in a news release. "Formalizing our relationship with them shows their commitment to helping scale cutting edge technology and opens up new avenues for Syzygy and MHIA to work together as we commercialize our industrial decarbonization platform."

Currently, Rigel, the commercial-scale photoreactor, is being tested in Syzygy's Pearland facility. Founded based off a breakthrough discovery out of Rice University from co-founders and professors Naomi Halas and Peter Nordlander, Syzygy closed a $76 million series C financing round last year, a $23 million series B round in 2021, and its $5.8 series A in 2019.

The funding will support advancement and commercialization of the technology and is a part of Mitsubishi Heavy Industries Group's commitment to decarbonization.

"By collaborating with and investing in partners with innovative technologies, MHI Group is working to build a hydrogen ecosystem and a CO2 ecosystem that can contribute to the realization of a decarbonized society," the company writes in a statement. "Through this investment, Mitsubishi Heavy Industries will support Syzygy's efforts to develop innovative alternative technologies that will lead to the diversification of both ecosystems."

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Houston expert discusses the clean energy founder's paradox

Guest Column

Everyone tells you to move fast and break things. In clean energy, moving fast without structural integrity means breaking the only planet we’ve got. This is the founder's paradox: you are building a company in an industry where the stakes are existential, the timelines are glacial, and the capital requires patience.

The myth of the lone genius in a garage doesn’t really apply here. Clean energy startups aren’t just fighting competitors. They are fighting physics, policy, and decades of existing infrastructure. This isn’t an app. You’re building something physical that has to work in the real world. It has to be cheaper, more reliable, and clearly better than fossil fuels. Being “green” alone isn’t enough. Scale is what matters.

Your biggest risks aren’t competitors. They’re interconnection delays, permitting timelines, supply chain fragility, and whether your first customer is willing to underwrite something that hasn’t been done before.

That reality creates a brutal filter. Successful founders in this space need deep technical knowledge and the ability to execute. You need to understand engineering, navigate regulation, and think in terms of markets and risk. You’re not just selling a product. You’re selling a future where your solution becomes the obvious choice. That means connecting short-term financial returns with long-term system change.

The capital is there, but it’s smarter and more demanding. Investors today have PhDs in electrochemistry and grid dynamics. They’ve been burned by promises of miracle materials that never left the lab. They don't fund visions; they fund pathways to impact that can scale and make financial sense. Your roadmap must show not just a brilliant invention, but a clear, believable plan to drive costs down over time.

Capital in this sector isn’t impressed by ambition alone. It wants evidence that risk is being retired in the right order — even if that means slower growth early.

Here’s the upside. The difficulty of clean energy is also its strength. If you succeed, your advantage isn’t just in software or branding. It’s in hardware, supply chains, approvals, and years of hard work that others can’t easily copy. Your real competitors aren’t other startups. They’re inertia and the existing system. Winning here isn’t zero-sum. When one solution scales, it helps the entire market grow.

So, to the founder in the lab, or running field tests at a remote site: your pace will feel slow. The validation cycles are long. But you are building in the physical world. When you succeed, you don’t have an exit. You have a foundation. You don't just have customers; you have converts. And the product you ship doesn't just generate revenue; it creates a legacy.

If your timelines feel uncomfortable compared to software, that’s because you’re operating inside a system designed to resist change. And let’s not forget you are building actual physical products that interact with a complex world. Times are tough. Don’t give up. We need you.

---

Nada Ahmed is the founding partner at Houston-based Energy Tech Nexus.

Houston maritime startup raises $43M to electrify cargo vessels

A Houston-based maritime technology company that is working to reduce emissions in the cargo and shipping industry has raised VC funding and opened a new Houston headquarters.

Fleetzero announced that it closed a $43 million Series A financing round this month led by Obvious Ventures with participation from Maersk Growth, Breakthrough Energy Ventures, 8090 Industries, Y Combinator, Shorewind, Benson Capital and others. The funding will go toward expanding manufacturing of its Leviathan hybrid and electric marine propulsion system, according to a news release.

The technology is optimized for high-energy and zero-emission operation of large vessels. It uses EV technology but is built for maritime environments and can be used on new or existing ships with hybrid or all-electric functions, according to Fleetzero's website. The propulsion system was retrofitted and tested on Fleetzero’s test ship, the Pacific Joule, and has been deployed globally on commercial vessels.

Fleetzero is also developing unmanned cargo vessel technology.

"Fleetzero is making robotic ships a reality today. The team is moving us from dirty, dangerous, and expensive to clean, safe, and cost-effective. It's like watching the future today," Andrew Beebe, managing director at Obvious Ventures, said in the news release. "We backed the team because they are mariners and engineers, know the industry deeply, and are scaling with real ships and customers, not just renderings."

Fleetzero also announced that it has opened a new manufacturing and research and development facility, which will serve as the company's new headquarters. The facility features a marine robotics and autonomy lab, a marine propulsion R&D center and a production line with a capacity of 300 megawatt-hours per year. The company reports that it plans to increase production to three gigawatt-hours per year over the next five years.

"Houston has the people who know how to build and operate big hardware–ships, rigs, refineries and power systems," Mike Carter, co-founder and COO of Fleetzero, added in the release. "We're pairing that industrial DNA with modern batteries, autonomy, and software to bring back shipbuilding to the U.S."

Shell partners with UK-based co. for hydrogen electrolyzer pilot

ultra-efficient electrolyzer

Shell Global Solutions International, a subsidiary of Shell, which maintains its U.S. headquarters in Houston, has signed a collaboration agreement with London-based Supercritical Solutions to advance Supercritical’s ultra-efficient hydrogen electrolyzer technology toward a field pilot demonstration.

In the deal, the companies will collaborate on a paid technology feasibility study that will support the evaluation and planning of the pilot demonstration, according to a news release. Supercritical Solutions’ technology aims to deliver high-efficiency renewable hydrogen at a lower cost for the industrial hydrogen market.

"Signing this collaboration agreement with Shell is a major milestone for Supercritical Solutions and an important step on our commercialisation journey,” Luke Tan, co-founder of Supercritical, said in the news release. “We are directly addressing the cost and complexity barriers facing the renewable hydrogen market. We are excited to move forward with a company like Shell, whose global leadership has been proven to accelerate innovative technologies to market.”

Supercritical’s hydrogen electrolyser technology can operate at high temperatures and pressures of up to 220 bar without the need for an external hydrogen compressor, rare-earth materials or easily degradable membranes. The technology removes the typical compression step in the process while delivering hydrogen at industry standards. It requires significantly less energy than many traditional electrolyzers and is more cost-efficient.

This recent investment builds on an ongoing relationship between Shell and Supercritical. Supercritical was founded in 2020 and was runner-up in Shell’s New Energy Challenge, which helps startups and scaleups develop sustainable technologies, in 2021. Shell Ventures then invested in Supercritical’s Series A funding round in 2024 with Toyota Ventures.

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