Venture Capital News: Mariana Minerals Unearths $310 Million Series B
2026-08-18
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SAN FRANCISCO, CA, Mariana Minerals , a software-first, vertically integrated critical minerals company, announced it has raised $310 million in Series B financing.
Mariana Minerals, a software-first, vertically integrated critical minerals company, announced it has raised $310 million in Series B financing.
The round was led by Khosla Ventures, with continued support from Andreessen Horowitz (a16z) and Breakthrough Energy Ventures, and new participation from Greenoaks, Halo Fund, Pax Ventures, StepStone Group, BHP Ventures, Washington Harbour Partners, Greycroft, General Innovation Capital Partners, Mitsubishi Corporation, In-Q-Tel (IQT), and Earthshot Ventures, with a number of additional strategic capital partners joining the round.
This round brings the company's total parent and project capital raised to date to approximately $400 million.
The round was led by Khosla Ventures, with continued support from Andreessen Horowitz (a16z) and Breakthrough Energy Ventures, and new participation from Greenoaks, Halo Fund, Pax Ventures, StepStone Group, BHP Ventures, Washington Harbour Partners, Greycroft, General Innovation Capital Partners, Mitsubishi Corporation, In-Q-Tel (IQT), and Earthshot Ventures, with a number of additional strategic capital partners joining the round.
This round brings the company's total parent and project capital raised to date to approximately $400 million.
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