Top 10 CleanTech/Clean Energy Raises and Investors in the U.S. – July 16th – Aug 31st, 2025
Several interesting transactions closed in the CleanTech/Clean Energy sector over the past month. If you would like more info on these deals or would like to discuss the capital raising market for your company, please contact me.
PE Growth/Expansion
- Streamline Innovations, treatment processes for natural gas and produced water in the oil and gas industry, received development capital from Select Milk Producers and Eldon Pass.
PIPE
- Empery Digital, an all-electric, off-road powersports vehicle company that develops and builds electric motorcycles and utility terrain vehicles, received $501.43 million of development capital from Borderless, RK Capital, Relayer Capital, Empery Asset Management and other investors, through a private placement.
Merger/Acquisition
- Heliogen, a renewable energy technology company that delivers round-the-clock, low-carbon energy production, using concentrated sunlight and thermal energy storage to deliver cost-effective, load-following, high-capacity factor thermal and electric energy, was acquired by Zeo Energy for $10 million.
Later Stage VC
- General Fusion, alternative power generation system that transforms energy supply with clean, safe, and abundant fusion energy, raised $22 million of venture funding from Chrysalix Venture Capital, Presight Capital and Gaingels.
- Natel Energy, hydropower systems that solve the problems inhibiting hydropower, raised $15.37 million of venture funding.
Later Stage VC
- Cuby Technologies, turnkey transportable factories that offer efficient, repeatable, and sustainable processes, raised $16.98 million of Series B venture funding.
Accelerator/Incubator
- Reframe Systems, construction materials to build net-zero carbon homes at a massive scale, raised $26 million through a combination of Series A-1 and Series A-2 venture funding in a deal led by Eclipse Venture Equity and VoLo Earth Ventures.
Grant
- CIBO Technologies, land information platform that facilitates agriculture scaling with unbiased information and direct connections, received $80 million of grant funding from Virginia Tech University.
Seed Round
- XL Batteries, batteries that reduce waste within the existing energy infrastructure and unlocks the potential of renewables for a sustainable future, raised $15.17 million of seed funding from SIP Global Partners, Measured Ventures and Sandy Spring Climate Partners.
Seed Round
- American Ostrich Farms, food products that transform ostrich production from a collection of fragmented, inefficient farms into a nationally scalable business, raised $3 million of angel funding.
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Tina Vital
Managing Director
Extensive career in engineering and investment banking focused on debt and equity transactions for infrastructure, energy, metals & mining, cleantech/waste management and other technology-based industries. Began engineering career with Exxon. Began Wall Street career at Citibank. Frequent guest on global financial news shows and the author of numerous engineering and energy finance publications. Previously served as Secretary-Treasurer and Executive Board Member for the United States Association of Energy Economics (USAEE); and Advisory Board Member for the International Pittsburgh Coal Conference. MBA from Carnegie Mellon University. ABD-PhD Chemical Engineering from the University of Massachusetts at Amherst. MS in Chemical Engineering from Lehigh University. BS in Biochemistry, Chemistry and Biology from the University of Pittsburgh. FINRA Series 7, 63 and 79 licensed.
- tvital@castleplacement.com
- (917) 432-8474
Tina Vital
Managing Director
Please contact me if you have any questions or would like to discuss your capital raise:
Email: tvital@castleplacement.com
(C) 917-432-8474
Send us a message:
Sources: Information on this page was derived from a variety of sources including Bloomberg, Company Websites, Crunchbase, PitchBook and other news outlets. Castle Placement® does not warrant or guarantee this information, nor makes any representations as to the accuracy of the information. For more Risks, see CPGO Risks and Disclaimers.
