Magrathea Metals

Magrathea Metals manufactures carbon-neutral magnesium metal through the electrolysis of seawater, providing a sustainable alternative to conventional magnesium production methods. The company also provides recycling management, decarbonization, and hydrometallurgy services. Founded in 2022 and headquartered in San Francisco, United States, Magrathea Metals has raised $100M in Series A funding from investors including Defense.gov, VoLo Earth Ventures, Capricorn, Valor Equity Partners, Exor Ventures, Counteract, EQT, Balerion Space Ventures, and Voyager. The company addresses the environmental impact of traditional magnesium production, which relies on energy-intensive processes primarily concentrated in China. By extracting magnesium from abundant seawater using renewable electricity, Magrathea enables domestic production of this critical lightweight metal for automotive, aerospace, and defense applications while eliminating the significant carbon emissions associated with conventional production methods.