Mariana Minerals raises $310M Series B

Mariana Minerals develops mineral projects using technology to supply critical minerals for energy, AI, and defense applications. The company announced a $310M Series B on August 3, 2026, from its base in San Francisco, US. Investors and valuation were not disclosed in Crunchbase's round record; Lounge adds them as they are reported. It has raised more than $100M in total venture funding.