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Energy & MaterialsDual-UseCritical Minerals
Mariana Minerals
San Francisco, California · Founded 2024
Valuation
—Est.
Raised
$395MEst.
Stage
Series A
Open roles
79
Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies.
Funding History
Series B$310M
Aug 2026 · Lead: Khosla Ventures
Participants: Andreessen Horowitz, Breakthrough Energy Ventures, Greenoaks, Halo Fund, Pax Ventures, StepStone Group, BHP Ventures, Washington Harbour Partners, Greycroft, General Innovation Capital Partners, Mitsubishi, In-Q-Tel, Earthshot Ventures
+265% · 3.65x · 13 mo vs. Series A
Series A$85M
Jul 2025 · Lead: Andreessen Horowitz
Participants: Breakthrough Energy Ventures, Khosla Ventures
Round Size Change
Latest Round Change
+265%3.65x
$310M Series B vs. $85M Series A
Series A
$85M
Jul 2025
+265% · 3.65x
→
13 mo
Series B
$310M
Aug 2026
Open roles at Mariana Minerals
Staff Mining Engineer Moab, UTCore Driller AssistantMoab, UTBlast Hole DrillerMoab, UTEngineering Manager, MarianaOSSan Francisco, CACore DrillerMoab, UTSr. Software Engineer, AutonomySan Francisco, CASr. Software Engineer, InfrastructureSan Francisco, CASr/Staff Civil EngineerSan Francisco, CA
Showing 8 of 79Careers page ↗
Leadership
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Valuation and funding totals are directional estimates and may not reflect confirmed terms.
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