Mariana Minerals (Series B)
Funding Details
Awarder
Inbox
Date Award
August 18, 2026
Vertical
Mining and Refining
Funding URL
View Funding Page
Funding Amount
$310,000,000
Company Info
Market
Mineral Resources
Location
San Francisco, CA, USA
Coinvestors
BHHP Ventures, Breakthrough Energy Ventures, Earthshot Ventures, General Innovation Capital Partners, Greenoaks, Greycroft, Halo Funds, In-Q-Tel, Khosla Ventures, Mitsubishi Corporation, Pax Ventures, StepStone Group, Washington Harbour Partners
Company Description

Mariana engineers, builds, and operates mines and refineries using its proprietary MarianaOS platform, which integrates capital project execution (CapitalProjectOS), refinery operations (PlantOS), and mine management (MineOS) into a single AI and machine learning stack. MarianaOS compresses traditional 5-to-10 year project execution timelines by roughly half and reduces commissioning timelines well below industry benchmarks.

Links
Website
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