Fluxnium raised $7M in seed funding led by Congruent Ventures to develop uranium extraction from seawater technology.
PRIVATESep 16, 2026
Amount Raised
$7 Million
Round Type
Seed
Biotechnology
Investors
Active Impact InvestmentsConstellation EnergyCongruent Ventures
Description
Fluxnium, a clean technology startup, has secured $7 million in seed funding led by Congruent Ventures, with participation from Active Impact Investments and Constellation Energy. The company is developing a method to extract uranium from seawater using specially designed polymer fibers suspended from offshore buoys. The technology is based on chemistry licensed from U.S. Department of Energy national laboratories
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Company Information
Company
Fluxnium
About
Fluxnium is a clean technology startup developing a method to extract uranium from seawater using specially designed polymer fibers. The fibers are suspended from offshore buoys and can be reused multiple times without producing toxic mining tailings. The technology is based on chemistry licensed from U.S. Department of Energy national laboratories. The company aims to address uranium supply concerns and geopolitical dependence as the nuclear industry expands.
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