Top 10 CleanTech/Clean Energy Capital Raises and Investors in the U.S. – September 1st – 15th, 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.

PIPE

1. CleanCore Solutions Inc, engages in the development and manufacturing of cleaning products that produce pure aqueous ozone for professional, industrial, or home use, received $175 million of development capital.
2. Deep Fission, underground energy systems designed for low-cost, scalable, and carbon-free electricity generation, received $30 million of development capital from Montrose Capital Partners.

Merger/Acquisition

3. Bridge to Renewables, a transportation program management platform intended to help electric vehicles interact with electricity markets, acquired by EnergyHub.
4. Gryphon Digital Mining, a Bitcoin mining company, acquired by American Bitcoin through a reverse merger.

Later Stage VC

5. Agrograph, a geospatial analytics platform designed for agricultural risk and sustainability assessment purposes, raised $2.28 million of venture funding from Idea Fund of La Crosse and other investors.
6. Birch Biosciences, a proprietary platform designed to engineer enzymes to offer a sustainable and cost-effective plastic recycling process, raised venture funding from Tuck Social Venture Fund.

Early Stage VC

7. Euclid Power, a renewable energy investment platform designed to guide through the execution of projects at all stages of the project lifecycle, raised $20 million through a combination of Series A-1 and Series A-2 venture funding in a deal led by Venrock.
8. Kloopify, a sustainable procurement platform designed to track, reduce, and report the supply chain’s global carbon footprint, raised venture funding from Black Tech Nation Ventures, True Wealth Ventures and Innovation Works.

Angel (individual)

9. NewType, sustainable technology designed to focus on rapid commercialization and manufacturing, raised $400,000 of angel funding.
10. Solenery, an energy technology company intended to address the urgent global need for sustainable energy alternatives, raised $750,000 of angel funding.

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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

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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.