August 3, 2026
Mariana Minerals
Mariana Minerals, a two-year-old startup, raised $310 million in Series B financing to accelerate US production of critical minerals through autonomous mining.
- Round
- Series B
- Amount raised
- $310M
- Lead investor
- Khosla Ventures
- Industry
- Mining
- Headquarters
- United States
- Employees
- —
- Website
- —
- —
Other investors
- a16z
- Breakthrough Energy Ventures
- Greenoaks
- StepStone
Source: MINING.COM