Houston energy startup closes $17M series A to fund Texas geothermal facility

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Houston-based Sage Geosystems announced the first close of $17 million round led by Chesapeake Energy Corp. Photo via sagegeosystems.com

A Houston geothermal startup has announced the close of its series A round of funding.

Houston-based Sage Geosystems announced the first close of $17 million round led by Chesapeake Energy Corp. The proceeds aim to fund its first commercial geopressured geothermal system facility, which will be built in Texas in Q4 of 2024. According to the company, the facility will be the first of its kind.

The venture is joined by technology investor Arch Meredith, Helium-3 Ventures and will include support from existing investors Virya, LLC, Nabors Industries Ltd., and Ignis Energy Inc.

“The first close of our Series A funding and our commercial facility are significant milestones in our mission to make geopressured geothermal system technologies a reality,” Cindy Taff, CEO of Sage Geosystems, says in a news release. “The success of our GGS technologies is not only critical to Sage Geosystems becoming post-revenue, but it is an essential step in accelerating the development of this proprietary geothermal baseload approach.

"This progress would not be possible without the ongoing support from our existing investors, and we look forward to continuing this work with our new investors," she continues.

The 3-megawatt commercial facility will be called EarthStore and will use Sage’s technology that harvests energy from pressurized water from underground. The facility will be able to store energy — for short and long periods of time — and can be paired with intermittent renewable energy sources like wind and solar. It will also be able to provide baseload, dispatchable power, and inertia to the electric grid.

In 2023, Sage Geosystems debuted the EarthStore system in a full-scale commercial pilot project in Texas. The pilot produced 200 kilowatt for more than 18 hours, 1 megawatt for 30 minutes, and generated electricity with Pelton turbines. The system had a water loss of less than 2 percent and a round-trip efficiency (RTE) of 70-75.

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This week's roundup of Houston innovators includes Jai Shah of Kahuna, Cindy Taff of Sage Geosystems, and Patrick Flam of Revterra. Photos courtesy

3 Houston innovators to know this week

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Editor's note: Each week, I'm introducing you to three Houston innovators to know — three individuals behind recent innovation and startup news stories in Houston as reported by InnovationMap. Learn more about them and their recent news below by clicking on each article.

Jai Shah, CEO of Kahuna Workforce Solutions

Kahuna CEO Jai Shah shares how he plans on deploying the $21 million his Houston company just raised. Photo courtesy of Kahuna

With a recent $21 million series B funding round set to fuel more growth and expand an impressive client roster, Kahuna Workforce Solutions is riding a big wave into 2024.

CEO Jai Shah tells InnovationMap that the Houston skills management software service company’s Hawaiian name captures their style.

“Kahuna is that kind of expert, competent leader in a tribe or family,” Jai says. “That’s all because we had this concept of really wanting to be providing a very..family-oriented consulting approach. Treat our customers like family, and with respect, love and really just try and deliver on that promise.” Continue reading.

Cindy Taff, CEO of Sage Geosystems

Cindy Taff of Sage Geosystems explains why she's so optimistic about geothermal and her company's technology. Photo courtesy of Sage

Geothermal energy is an integral part of decarbonizing the energy industry, and Sage Geosystems CEO Cindy Taff believes her company's tech has what it takes to lead the way.

Founded in Houston in 2020, Sage Geosystems is focused on two business lines — energy storage and geothermal. In addition to developing these technologies, Taff says Sage has "cracked the code" on both reducing costs and maximizing electricity output. Sage has customers ranging from Nabors, the world’s largest land-based drilling company, and Virya LLC, an investor in climate ventures with high impact of eliminating global greenhouse gas emissions or sequestering CO2. Continue reading.

Patrick Flam, CFO of Revterra

Revterra was selected from among 10 finalists receiving up to $1 million piloting opportunities. Photo via ADNOC

Revterra, which produces novel batteries made from recycled steel, has been awarded a million-dollar piloting opportunity by ADNOC following a global competition. The ADNOC Decarbonization Technology Challenge, in collaboration with AWS, bp, Hub71, and the Net Zero Technology Centre, sought to find emerging climate tech innovations that are ready for scale.

At the event in Dubai, Revterra was selected from among 10 finalists receiving up to $1 million piloting opportunities. In addition to the $1 million, they will gain access to facilities and expertise at the ADNOC Research and Innovation Center in Abu Dhabi.

“We are thrilled to win this opportunity,” Patrick Flam, CFO of Revterra, says in a news release. “At Revterra, we have developed an environmentally friendly battery that doesn’t rely on metals like lithium, nickel, or cobalt.” Continue reading.

Cindy Taff of Sage Geosystems explains why she's so optimistic about geothermal and her company's technology. Photo courtesy of Sage

Houston sustainability startup founder on why geothermal is a 'cornerstone' tech for energy transition

Q&A

Geothermal energy is an integral part of decarbonizing the energy industry, and Sage Geosystems CEO Cindy Taff believes her company's tech has what it takes to lead the way.

Founded in Houston in 2020, Sage Geosystems is focused on two business lines — energy storage and geothermal. In addition to developing these technologies, Taff says Sage has "cracked the code" on both reducing costs and maximizing electricity output. Sage has customers ranging from Nabors, the world’s largest land-based drilling company, and Virya LLC, an investor in climate ventures with high impact of eliminating global greenhouse gas emissions or sequestering CO2

In a Q&A that originally ran on EnergyCapital, she explains why she's so optimistic about geothermal and her company's technology.

EnergyCapital: Why do you believe geothermal has a major role to play in the energy transition?

Cindy Taff: Geothermal energy is not just a contender in the energy transition; it is a cornerstone. The question isn’t if we can drive down the costs to be competitive with wind, solar, and natural gas—it’s when. As renewable credits for solar and wind begin to expire, these industries will face the reality of their “real costs.”

As a 24/7 renewable energy source, it provides a constant and reliable power supply, unlike the intermittent nature of solar and wind. Moreover, the rising costs of lithium-ion batteries, driven by the increasing scarcity of lithium and cobalt, further underscore geothermal’s economic viability.

My extensive experience in both geothermal and the O&G sector is a testament to the synergistic relationship between these industries. The skills honed in O&G are not only transferable—they are essential to advancing geothermal technologies. In summary, the O&G industry can make a huge impact to geothermal by systematically driving down costs while scaling up, which is exactly what we did for unconventional shales.

EC: When it comes to finding partners or investors, what are you looking for? What should potential partners/investors know about Sage?

CT: Our technology is ready to scale today, not five to 10 years into the future. We will deliver our first energy storage power plant in 2024 and our first enhanced geothermal power plant in 2025. We are looking for synergies with investors, such as companies with power market or O&G expertise.

In addition, we seek to partner with others who have local content and relationships in places around the world to enable us to quickly and broadly scale our technologies. Sage's technologies are extremely flexible, in that we can deliver energy storage or enhanced geothermal to the utility grid or behind-the-meter to targeted commercial customers, including a dedicated microgrid (i.e., for the U.S. Air Force). Our technologies can provide electricity to remote locations such as mining operations or to large population centers such as Houston, and everything in between.

EC: What's the biggest challenge Sage is facing as an energy transition startup and how do you plan to tackle it?

CT: A common misunderstanding about Sage is that we only do energy storage or that we only do geothermal. However, we do both and the technologies build on one another. Essentially, our energy storage technologies will allow us to "walk" before we "run" with geothermal. On a related point, at this point in the energy transition, time to commercialization and affordability of new clean technology are the leading factors in terms of climate impact. As the first geothermal company to deliver a cost-effective commercial enhanced geothermal system, we are poised to truly make a meaningful difference.

EC: As a woman in a male-dominated industry tackling a global problem, what's been your biggest lesson learned? What's your advice to fellow energy tech female founders?

CT: In my journey as a woman in the energy tech industry, I’ve been fortunate to focus on the work and the global challenges we’re addressing, rather than on any gender-based obstacles. My biggest lesson learned is that innovation and leadership know no gender. Success is driven by perseverance, vision, and collaboration.

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This conversation has been edited for brevity and clarity.

The six finalists for the sustainability category for the 2023 Houston Innovation Awards weigh in on their challenges overcome. Photos courtesy

Top Houston-based sustainability startups share their 4 biggest challenges

houston innovation awards

Six Houston-area sustainability startups have been named finalists in the 2023 Houston Innovation Awards, but they didn't achieve this recognition — as well as see success for their businesses — without any obstacles.

The finalists were asked what their biggest challenges have been. From funding to market adoption, the sustainability companies have had to overcome major obstacles to continue to develop their businesses.

The awards program — hosted by InnovationMap, and Houston Exponential — will name its winners on November 8 at the Houston Innovation Awards. The program was established to honor the best and brightest companies and individuals from the city's innovation community. Eighteen energy startups were named as finalists across all categories, but the following responses come from the finalists in the sustainability category specifically.

    Click here to secure your tickets to see who wins.

    1. Securing a commercial pilot

    "As an early-stage clean energy developer, we struggled to convince key suppliers to work on our commercial pilot project. Suppliers were skeptical of our unproven technology and, given limited inventory from COVID, preferred to prioritize larger clients. We overcame this challenge by bringing on our top suppliers as strategic investors. With a long-term equity stake in Fervo, leading oilfield services companies were willing to provide Fervo with needed drilling rigs, frack crews, pumps, and other equipment." — Tim Latimer, founder and CEO of Fervo Energy

    2. Finding funding

    "Securing funding in Houston as a solo cleantech startup founder and an immigrant with no network. Overcome that by adopting a milestone-based fundraising approach and establishing credibility through accelerator/incubator programs." — Anas Al Kassas, CEO and founder of INOVUES

    "The biggest challenge has been finding funding. Most investors are looking towards software development companies as the capital costs are low in case of a risk. Geothermal costs are high, but it is physical technology that needs to be implemented to safety transition the energy grid to reliable, green power." — Cindy Taff, CEO of Sage Geosystems

    3. Market adoption

    "Market adoption by convincing partners and government about WHP as a solution, which is resource-intensive. Making strides by finding the correct contacts to educate." — Janice Tran, CEO and co-founder of Kanin Energy

    "We are creating a brand new financial instrument at the intersection of carbon markets and power markets, both of which are complicated and esoteric. Our biggest challenge has been the cold-start problem associated with launching a new product that has effectively no adoption. We tackled this problem by leading the Energy Storage Solutions Consortium (a group of corporates and battery developers looking for sustainability solutions in the power space), which has opened up access to customers on both sides of our marketplace. We have also leveraged our deep networks within corporate power procurement and energy storage development to talk to key decision-makers at innovative companies with aggressive climate goals to become early adopters of our products and services." — Emma Konet, CTO and co-founder of Tierra Climate

    4. Long scale timelines

    "Scaling and commercializing industrial technologies takes time. We realized this early on and designed the eXERO technology to be scalable from the onset. We developed the technology at the nexus of traditional electrolysis and conventional gas processing, taking the best of both worlds while avoiding their main pitfalls." — Claus Nussgruber, CEO of Utility Global

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    This article originally ran on EnergyCapital.

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    Venus Aerospace adds government, C-suite leaders following $91M raise​

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    Fresh off its $91 million Series B, Houston-based Venus Aerospace has made several key additions and promotions to its leadership team.

    The company says its expanded team will help it deploy its high-thrust rotating detonation rocket engine (RDRE), which completed its first U.S. flight test last summer.

    "We flew the world's first high-thrust RDRE in just over four years on $80 million. We believe that makes it the fastest, most capital-efficient rocket engine program in history," Sassie Duggleby, co-founder and CEO of Venus Aerospace, said in a news release. "Adding this talent to our leadership team is how we bring that same discipline to the company itself, as we scale to meet the technical needs of defense and space customers who need range and speed legacy systems can't deliver."

    The key hires include:

    Lane Bodian, Vice President of Public Policy

    Bodian previously served as the Principal Deputy Assistant Secretary of Defense for Legislative Affairs at the Pentagon.

    Dan Rebnord, Director of Federal Government Relations

    Rebnord most recently served as Senior Policy Advisor to a member of the Senate Armed Services Committee and previously worked in the Office of Legislative Affairs at the Department of Defense and as Staff Director for a national security subcommittee in the House of Representatives. Rebnord and Bodian will lead Venus' work with government stakeholders.

    Tom Barron, Chief Operating Officer

    Barron was promoted from his role as vice president of operations for Venus Aerospace. Before his time at Venus, he served as Special Assistant to the Secretary of Defense and consulted aerospace clients at McKinsey & Company. He also served as a U.S. Army Infantry and Special Forces officer.

    Nick Cardwell, Chief Product Officer

    Cardwell was promoted from his role as vice president of research and development. He previously held product and technology leadership roles at VC-backed tech companies in the San Francisco Bay Area and Austin.

    Venus also named Cameron Taylor as its new vice president of operations, Sarah Boland Heine as its head of communications, Matt Stohr as its head of business development, and Sheila Menz as general counsel.

    The company also announced a joint technology development agreement to advance the RDRE with defense giant Lockheed Martin last week. Through the partnership, Venus and Lockheed will focus on evaluating the RDRE's propulsion architecture in defense systems, specifically for precision fires applications where weapons are designed to accurately strike targets at long distances.

    Lockheed Martin Ventures, the investment arm of the aerospace and defense contractor, is an investor in Venus Aerospace.

    "Lockheed Martin is focused on rapidly delivering advanced capabilities that strengthen deterrence and provide decisive advantages for the warfighter," Tim Cahill, president, Lockheed Martin Missiles and Fire Control, said in a news release. "Our collaboration with Venus Aerospace allows us to evaluate a promising propulsion technology and determine how it can be integrated into future precision fires solutions. Efforts like this help accelerate innovation, reduce risk and shorten the path from emerging technology to operational capability."

    Venus' RDRE is expected to enable vehicles to travel four to six times the speed of sound from a conventional runway and is about 15 percent more efficient than traditional alternatives, according to the company.

    Venus says the reusable, affordable and scalable RDRE is designed with a "common propulsion architecture" that can work for multiple industries and mission types. The company has previously estimated that the hypersonic market is projected to surpass $12 billion by 2030.

    New report ranks Houston as America's No. 2 least safe city

    Ranking It

    A new study contains bad news for Houston. A report from personal finance website SmartAsset ranks the Bayou City as the second-least safe city in the U.S. among cities with at least 250,000 residents.

    Only Memphis ranked worse than Houston.

    The 2026 study looked at 83 U.S. cities' violent crimes, property crimes, traffic deaths, and disaster risk.

    Houston fared poorly in all four: 11.5 violent crimes per 1,000 residents, 42.9 property crimes per 1,000 residents, 11.6 traffic deaths per 100,000 residents, and “very high” risk for natural disasters, which makes sense in a city prone to tropical weather and flooding.

    For all cities in the study, disaster risk and traffic deaths were measured at the county level.

    Houston is the only Texas city to rank in the bottom 10. The other cities are:

    • 1. Memphis, Tennessee
    • 2. Houston, Texas
    • 3. St. Louis, Missouri
    • 4. San Francisco, California
    • 5. Kansas City, Missouri
    • 6. Albuquerque, New Mexico
    • 7. Oakland, California
    • 8. Nashville, Tennessee
    • 9. Philadelphia, Pennsylvania
    • 10. Detroit, Michigan

    “While no major population center is entirely free from danger, some are more successful than others at creating environments where people can live, work and travel with confidence,” SmartAsset says.

    Although this study paints Houston in a poor light, other reports take a more positive view. The "America's Best Cities" report from Canada-based real estate and tourism marketing firm Resonance Consultancy ranked as No. 9 in America out of 393 cities with a population of 500,000 or more. Houston also boasts Texas’ 10th best park system, according to its ParkScore Index.

    While SmartAsset has bad news for Houston, the Dallas suburb of Plano ranked as the study’s second-safest big city. Compared to Houston, Plano fared well in three of the four categories: 1.5 violent crimes per 1,000 residents, 14.7 property crimes per 1,000 residents, and 6.9 traffic deaths per 100,000 residents. Its only shortcoming is a “relatively high” risk for natural disasters.

    Elsewhere in Texas:

    • Fort Worth ranked No. 22
    • Austin ranked No. 26
    • San Antonio ranked No. 54
    • Dallas ranked No. 73
    ----

    This article originally appeared on CultureMap.com. Eric Sandler contributed to this article.

    15+ startups fueling Houston's $1 billion funding haul for Q1-Q2 2026

    cha-ching

    Houston startups started 2026 strong, bringing in nearly $1 billion in venture capital in the first half of the year, Pitchbook data shows.

    Here are 17 Houston companies that secured funding since January, according to reporting by InnovationMap and our sister site, EnergyCapitalHTX.com.

    Did we miss a funding round? Let us know by emailing innoeditor@innovationmap.com.

    Sage Geosystems

    Sage Geosystems raised a $97 million Series B. Photo via sagegeosystems.com.

    Houston-based geothermal energy startup Sage Geosystems closed its Series B fundraising round in January and plans to use the money to launch its first commercial next-generation geothermal power generation facility.

    Ormat Technologies and Carbon Direct Capital co-led the $97 million round, according to a press release from Sage. Existing investors Exa, Nabors, alfa8, Arch Meredith, Abilene Partners, Cubit Capital and Ignis H2 Energy also participated, as well as new investors SiteGround Capital and The UC Berkeley Foundation’s Climate Solutions Fund.

    The new geothermal power generation facility will be located at one of Ormat Technologies' existing power plants. The Nevada-based company has geothermal power projects in the U.S. and numerous other countries around the world. The facility will use Sage’s proprietary pressure geothermal technology, which extracts geothermal heat energy from hot dry rock, an abundant geothermal resource. Continue reading.

    TrueLeap Inc.

    Sandip Bordoloi and Sunny Zhang, founders of True Leap Inc. Photo via trueleapinc.com.

    Houston-based edtech company TrueLeap Inc. closed an oversubscribed seed round in January.

    The $3.3 million round was led by Joe Swinbank Family Limited Partnership, a venture capital firm based in Houston. Gamper Ventures, another Houston firm, also participated with additional strategic partners.

    TrueLeap reports that the funding will support the large-scale rollout of its "edge AI, integrated learning systems and last-mile broadband across underserved communities." Continue reading.

    Wellysis

    Wellysis is known for its continuous ECG/EKG monitor with AI reporting, known as the S-Patch. Photo via wellysis.com.

    Wellysis, a Seoul, South Korea-headquartered wearable biosensing company with its U.S. subsidiary based in Houston, closed a $13.5 million pre-IPO funding round in February and plans to expand its Texas operations.

    The round was led by Korea Investment Partners, Kyobo Life Insurance, Kyobo Securities, Kolon Investment and a co-general partner fund backed by SBI Investment and Samsung Securities, according to a news release.

    Wellysis reports that the latest round brings its total capital raised to about $30 million. The company is working toward a Korea Securities Dealers Automated Quotations listing in Q4 2026 or Q1 2027.

    Wellysis is known for its continuous ECG/EKG monitor with AI reporting. Its lightweight and waterproof S-Patch cardiac monitor is designed for extended testing periods of up to 14 days on a single battery charge. Continue reading.

    DexMat

    DexMat plans to use its seed funding to commercially scale Galvorn, its carbon-based conductive fiber. Photo courtesy DexMat

    Houston-based material science and climatech startup DexMat closed a $5 million seed round in February.

    The round was led by non sibi ventures, with participation from Governance Partners, Tailwind Futures, BetterWay, Capital Factory and other investors. The company additionally announced that it has secured $3 million of non-dilutive funding.

    DexMat plans to use the recent round to commercially scale Galvorn, its carbon-based conductive fiber. The high-performance copper alternative, originally developed at Rice University, is made from carbon nanotube (CNT) fibers, which are less energy- and CO2-intensive to produce. Continue reading.

    Coya Therapeutics

    Houston biotech co. raises $11M to advance ALS drug development

    Coya Therapeutics plans to scale up manufacturing and prepare for the commercialization of COYA 302, its ALS therapy drug. Photo via Getty Images

    Houston-based clinical-stage biotechnology company Coya Therapeutics (NASDAQ: COYA) closed a $11.1 million in a private investment round in February.

    India-based pharmaceuticals company Dr. Reddy’s Laboratories Inc. led the round with a $10 million investment, according to a news release. New York-based investment firm Greenlight Capital, Coya’s largest institutional shareholder, contributed $1.1 million.

    Coya reports that it plans to use the proceeds to scale up manufacturing of low-dose interleukin-2 (IL-2), which is a component of its COYA 302 and will support the commercial readiness of the drug. COYA 302 enhances anti-inflammatory T cell function and suppresses harmful immune activity for treatment of Amyotrophic Lateral Sclerosis (ALS), Frontotemporal Dementia (FTD), Parkinson’s disease and Alzheimer’s disease. Continue reading.

    Utility Global

    Utility Global’s H2Gen technology aims to decarbonize the heavy industrial sector. Photo courtesy of Utility Global

    Houston-based Utility Global raised $100 million in an ongoing Series D round to globally deploy its decarbonization technology at an industrial scale, the company reported in February.

    The round was led by Ara Partners and APG Asset, according to a news release. Utility plans to use the funding to expand manufacturing, grow its teams and support its commercial developments and partnerships.

    Utility Global's H2Gen technology produces low-cost, clean hydrogen from water and industrial off-gases without requiring electricity. It's designed to integrate into existing industrial infrastructure in hard-to-abate assets in the steel, refining, petrochemical, chemical, low-carbon fuels, and upstream oil and gas sectors. Continue reading.

    Cart.com

    Cart.com raised $180 million to scale its logistics network, expand AI capabilities and develop workflow automation tools. Photo courtesy of Cart.com

    Houston-based commerce and logistics platform Cart.com raised $180 million in growth capital from private equity firm Springcoast Partners, pushing the startup past the $1 billion funding mark since its founding in 2020, the company reported in March.

    Cart.com says it will use the capital to scale its logistics network, expand AI capabilities and develop workflow automation tools. Continue reading.

    Artemis

    Houston-based Artemis, formerly Monalee, closed its latest funding round in March. Rendering courtesy Artemis.

    Houston tech startup Artemis raised $6 million from 10 investors, it reported in March. The company offers an AI-supported platform that enables solar, battery storage and home improvement contractors to design, sell and finance energy projects.

    Long Journey and Copec WIND Ventures co-led the round, with participation from angel investor Scott Banister, Coalition Operators, FJ Labs, Ludlow Ventures, Palm Tree Crew, Plug and Play Ventures, Shrug Capital and Tribeca Ventures.

    To help propel growth, the company secured $10 million in financing last year (under its previous name, Monalee) from venture debt and growth credit provider Applied Real Intelligence. As Monalee, the company raised $16 million in venture capital. Continue reading.

    Helix Earth

    Helix Earth's technology is estimated to save up to half of the net energy used in commercial air conditioning, reducing both emissions and costs for operators. Photo via Getty Images

    Houston-based Helix Earth Technologies closed a $12 million Seed 2 funding round to scale manufacturing of its energy-efficient commercial HVAC add-on technology in April.

    Veriten, a Houston-based energy investment firm, led the round. Rua Ventures, Carnrite Ventures, Skywriter LLC and Textbook Ventures also participated.

    Helix Earth—which was founded based on NASA technology, spun out of Rice University and has been incubated at Greentown Labs—is developing high-efficiency retrofit dehumidification systems that aim to reduce the energy consumption of commercial HVAC units. The company reports that its technology can lead to "healthier indoor air, lower energy bills, reduced building maintenance, and more comfortable spaces for building owners and occupants." Continue reading.

    NanoTech Materials

    The company has developed thermal insulation technology that improves efficiency and safety in buildings and outdoor infrastructure. Photo via LinkedIn

    Houston-based NanoTech Materials closed a $29.4 million Series A in April.

    The round was led by Austin-based HPI Real Estate & Investments. Houston-based Goose Capital and Austin-based Milliken & Company also participated.

    Nanotech has developed its patented Insulative Ceramic Particle (ICP) technology, which reduces heat transfer in buildings and outdoor infrastructure, improving efficiency and safety. It's known for its Cool Roof Coat, Wildfire Shield and Insulative Coat: Cool Touch product lines. Continue reading.

    Paige

    Paige founder and CEO Emily Cisek. Photo courtesy Paige

    Houston-based Paige, a comprehensive life planning and succession software company, secured a $2.5 million investment to expand the AI-driven tools on its platform this spring.

    The funding comes from Alabama-based 22nd State Banking Company, according to a news release. Paige says it will use the funding to expand automation, AI-driven onboarding and self-service tools, as well as add to its sales and customer success teams.

    The company was originally founded by CEO Emily Cisek in 2020 as The Postage and rebranded to Paige last year. It helps users navigate and organize end-of-life planning with features like document storage and organization, password management, and funeral and last wishes planning. Continue reading.

    Ace Green Recycling

    The company plans to use the funds to support its flagship Texas facility and planned merger. Photo via LinkedIn

    Houston-based Ace Green Recycling raised $32 million in private investment in public equity (PIPE) financing to support its future plans for growth, the company reported in May.

    The battery recycling technology company secured the financing with Athena Technology Acquisition Corp. II, a publicly traded special purpose acquisition company that Ace previously announced it plans to merge with. Once the merger is completed, Ace will become a publicly traded company on the Nasdaq Stock Exchange under the ticker symbol "AGXI."

    Ace says the financing will be used to complete the merger and scale the company. Continue reading.

    Casimir

    Casimir’s semiconductor chips can generate power from quantum vacuum fields without the need for batteries or charging. Photo via casimir.inc

    Houston-based Casimir emerged from stealth in May with a $12 million seed round to commercialize its quantum energy chip.

    The round was led by Austin-based Scout Ventures. Lavrock Ventures, Cottonwood Technology, Capital Factory, American Deep Tech, and Tim Draper of Draper Associates also participated in the round. The oversubscribed round exceeded the company’s original $8 million target, according to a news release.

    Casimir’s semiconductor chips can generate power from quantum vacuum fields without the need for batteries or charging. The company plans to commercialize its first-generation MicroSparc chip by 2028. Continue reading.

    VoltaGrid

    VoltaGrid has developed a modular power generation system that improves reliability and limits emissions. Photo via voltagrid.com

    Houston-based power generation startup VoltaGrid nailed down a $1 billion equity investment from asset management heavyweight Blackstone and Houston-based oilfield services provider Halliburton in May.

    The investment came in two forms:

    • A $775 million primary capital raise
    • A $225 million secondary capital purchase from existing investors

    VoltaGrid, founded in 2020, provides behind-the-meter mobile power generation equipment for data centers, microgrids and industrial customers. Continue reading.

    Aquanta Vision

    Babur Ozden is the founder and CEO of Aquanta Vision. Photo via LinkedIn

    Houston climatech startup Aquanta Vision secured pre-seed funding to accelerate the commercialization of its methane leak detection software, the company announced in May.

    EIC Rose Rock participated in the round, joining investors like Marathon Petroleum Corporation, Chevron Technology Ventures, Ecosphere Ventures, and Odyssey Energy Advisors. The investment follows successful field trials for Aquanta Vision’s optical gas imaging (OGI) detection software, according to the company. Continue reading.

    Axiom Space

    Axiom Space closed an oversubscribed $525 million round in June. Image via NASA

    Axiom Space tacked on an additional $175 million to a previously announced capital raise in June, bringing the oversubscribed round to a total of more than $525 million.

    Axiom shared in February that it had secured $350 million in a financing round led by Type One Ventures and Qatar Investment Authority. In June, the company reported that Japan-based MUFG Bank Ltd. joined the round as a new investor, in addition to continued participation from existing backers.

    The funding will go toward developing the company's commercial space station, known as Axiom Station, and the production of its Axiom Extravehicular Mobility Unit (AxEMU) under its NASA spacesuit contract. Continue reading.

    Receipts Depositary Corporation

    The company's platform makes it easier to buy and trade hard-to-access and less traditional assets. File photo

    Houston-based fintech company Receipts Depositary Corporation closed a $7 million oversubscribed funding round in June and plans to scale.

    The round was led by Austin-based LiveOak Ventures, with participation from Hivemind Capital, Onigiri Capital, OTC Markets Group, GTS, and Redbeard Ventures, according to a release from RDC.

    RDC's platform issues depositary receipts (DRs) to qualified investors on digital and alternative assets, making it easier for investors to buy and trade hard-to-access and less traditional assets. Continue reading.

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