Fluxnium Raises $7M for Seawater Uranium
Fluxnium has raised $7 million to commercialise technology for extracting uranium from seawater.
The nuclear-power revival is creating renewed interest in the fuel supply chain. Fluxnium has raised $7 million to pursue one of its most unconventional sources: uranium dissolved in seawater.
What happened
Fluxnium emerged from stealth after closing a $7 million seed round led by Congruent Ventures, with participation from Active Impact Investments and nuclear operator Constellation Energy.
The company has licensed technology developed by the US Department of Energy that uses specialised polymer fibres to capture uranium from seawater.
Why it matters
The oceans contain vastly more uranium than known terrestrial reserves, but extracting it economically has historically been the obstacle.
If recovery costs can fall close enough to conventional mining, seawater could become a long-duration strategic fuel source for nuclear power while reducing dependence on concentrated mining regions.
The bigger picture
Nuclear deployment is accelerating because grids need reliable low-carbon power for electrification and data centres.
That is pushing investment beyond reactors themselves into enrichment, fuel, advanced materials and supply security. Fluxnium is an early-stage bet that new extraction technology can become part of that broader nuclear infrastructure stack.