Los Angeles – September 21, 2026 -- Fluxnium, Inc. has closed a $7 million seed round led by Congruent Ventures to commercialize technology that adsorbs uranium directly from seawater, targeting a domestic alternative to mined ore for nuclear fuel supply. Constellation Technology Ventures, the venture arm of Constellation (NASDAQ: CEG), and Active Impact Investments, Canada's largest climate tech seed fund, also participated in the round.