Mariana Minerals · series b · ~$400M raised
📍 San Francisco, CA, Houston, TX or Ann Arbor, MI
💰 $140K - $200K + equity
Listed October 7, 2026
Mariana Minerals is a software-first, vertically integrated critical minerals company that designs and runs mines and refineries on its own operating system, MarianaOS. It restarted the idled Copper One mine in Utah under autonomous orchestration within four months and is building Lithium One in East Texas, a GWh-scale plant producing lithium from oil and gas produced water. In August 2026 it raised a $310M Series B led by Khosla Ventures at a $1.5B valuation and is hiring across software, ML, autonomy, product and design.
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