Mariana Minerals raised $310 million in Series B financing to expand critical minerals projects and deploy its MarianaOS software platform.
- Amount
- $310M
- Stage
- Series B
- Announced
- 3 August 2026
- Lead
- Khosla Ventures
- Other investors
- Andreessen Horowitz (a16z), Breakthrough Energy Ventures, Greenoaks, Halo Fund, Pax Ventures, StepStone Group, BHP Ventures, Washington Harbour Partners, Greycroft, General Innovation Capital Partners, Mitsubishi Corporation
- Use of funds
- Expanding its critical minerals project portfolio and further deploying its MarianaOS software platform.
- Total raised
- $400M to date
- Valuation
- $1.5B
- Checked
- Announced by the company