Funding
Series B · Industrial tech

Mariana Minerals raises $310m Series B

Mariana Minerals announced $310m in Series B financing, with backers including Khosla Ventures, a16z and Breakthrough Energy Ventures.

Updated Oct 16, 2026By RoundOS Funding desk

Named backers include Khosla Ventures, 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, In-Q-Tel, Earthshot Ventures.

Funding history

Series B · This round$310M

Sources

  1. Mariana Mineralsprojectstartups.com
  2. prnewswire.com

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