Top 10 Infrastructure Capital Raises and Investors in the U.S. – June 1st – 30th, 2026
Several interesting transactions closed in the Infrastructure 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
- Sustainability Partners, an infrastructure services company that delivers and maintains essential infrastructure assets through a utility-style service model, received development capital from Sciens Capital Management.
Merger/Acquisition
- Brazos Midstream, a natural gas and crude oil company that operates gathering pipelines, processing facilities, and storage assets, acquired by Western Midstream Partners, a subsidiary of Anadarko Petroleum, for an estimated $1.6 billion.
Later Stage VC
- Upstart Power, a fuel cell technology company that manufactures solid oxide fuel cell generators for distributed power generation, raised $4.1 million of venture funding.
- Netris, a network automation company that develops multi-tenancy platforms for artificial intelligence infrastructure, raised $15 million of Series A venture funding.
Early Stage VC
- Endurance Energy, a geothermal energy company that develops offshore geothermal power solutions, raised $54 million of Series A venture funding in a deal led by Founders Fund.
- Ambrosia Energy, a renewable energy company that provides solar and battery power plants for industrial operations, raised venture funding from DFJ Growth.
Seed Round
- Transformative American Resources, an energy infrastructure company that develops and manages sustainable power systems, raised $27 million of seed funding.
- Mantle, a geothermal energy company that repurposes depleted oil and gas wells for power generation, raised $5 million of Seed-1 funding in a deal led by 17Shoals.
Angel (individual)
- Reversii Finance, an infrastructure intelligence company that develops AI-powered platforms for managing physical infrastructure systems, raised $61,000 of angel funding.
- Nucleus Power, a nuclear energy company that develops microreactor technology for on-site electricity generation, raised $64,000 of angel funding.
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Axel Reijmers
Managing Director
Former Head of Corporate Finance M&A Americas for the Royal Bank of Scotland and ABN AMRO Bank, based in New York. Began his career at ABN AMRO Bank in Japan, and subsequently in The Netherlands in the Corporate Finance department. Was seconded to New York in 2006 to co-establish the ABN AMRO North America Corporate Finance M&A department and grew it by advising medium and large companies on domestic and cross-border mergers, acquisitions, capital raisings and capital structurings. Led the management buyout of RBS Bank Mexico and RBS Broker-Dealer Mexico in 2014 and spearheaded the subsequent growth of the bank as Head of Investment Banking & Corporate Development. During his tenure he supported companies with capital and financing solutions with a focus on companies in the US and Mexican energy infrastructure sector and fintech sector. Holds a master’s degree in economics from Groningen University, The Netherlands. Holds FINRA Series 7 and 63 licenses.
- Email: areijmers@castleplacement.com
- (C) (201) 747-4718
 Axel ReijmersManaging Director |
Please contact me if you have any questions or would like to discuss your capital raise:
Email: areijmers@castleplacement.com
(C) (201) 747-4718
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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.
