Mariana Minerals Stock
| Valuation | $1.5B1 |
| Valuation Date | Aug 3, 2026 |
| Implied Valuation | n/a |
| Last Price | n/a |
| 52-Week High | n/a |
| 52-Week Low | n/a |
| YTD Return | n/a |
| 1-Year Return | n/a |
| 3-Year Return | n/a |
| Total Funding | $395M2 |
| Latest Round Amount | $310M3 |
| Latest Round | Series B |
| Funding Rounds | 2 |
| IPO Status | Unknown |
| Expected IPO Date | n/a |
| Revenue | n/a |
| Revenue Type | n/a |
| P/S Ratio | n/a |
About Mariana Minerals
Mariana Minerals is a software-first mining company that designs, builds and operates its own mines and refineries for critical minerals such as copper, lithium and nickel. It deploys an in-house platform called MarianaOS across capital-project execution, mine-fleet orchestration and plant control at sites it owns rather than selling the software to other miners. The company makes money by producing and selling metals from those operations, including copper cathode at Copper One in southeastern Utah and planned battery-grade lithium salts at Lithium One in East Texas. CEO Turner Caldwell previously led Tesla's metals and minerals team.
Invest in Mariana Minerals
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News
Mariana Minerals CEO on $310 million funding round, autonomous mining and the critical minerals race
CEO Turner Caldwell told CNBC the Series B will help scale autonomous mining and combine U.S. copper production with scrap recycling. He argued automation can ease labor shortages and unlock projects ...
Mariana Minerals Raises $310 Million Series B Led by Khosla Ventures
Mariana Minerals closed a $310 million Series B led by Khosla Ventures at a $1.5 billion valuation, bringing total parent and project capital to about $400 million.
To power AI, Khosla and a16z bet this startup can reinvent mining
Fortune reports Mariana Minerals raised a $310 million Series B led by Khosla Ventures at a $1.5 billion valuation, bringing total capital to about $400 million. The San Francisco company is using sof...
Series B Announcement
Mariana Minerals announced a $310 million Series B led by Khosla Ventures, with a16z, Breakthrough Energy Ventures, Greenoaks, BHP Ventures and others participating. The company said the round brings ...
This Tesla Veteran Is Running A Copper Mine With AI-Powered Robots
Forbes reports Mariana Minerals launched autonomous mining at Copper One in southeastern Utah, using driverless haul trucks, automated drills and its MarianaOS platform. CEO Turner Caldwell, a former ...
Mariana Minerals Restarts Utah Copper Mine as the World's Only Autonomous-First Mine and Refinery
Mariana said it restarted mining at Copper One after acquiring Lisbon Valley Mining Company in late 2025. The site is deploying Pronto haulage, Sandvik AutoMine drilling and Boston Dynamics Spot robot...
Mariana Minerals and Pronto announce partnership to automate mining truck ops at Copper One
Mariana partnered with Pronto, the autonomous haulage company later acquired by Atoms, to run driverless trucks at Copper One. Pronto's system is meant to feed directly into MineOS rather than sit as ...
Announcing Copper One: The World's Only Autonomy-First Mine and Refinery
Mariana introduced Copper One, a southeastern Utah open-pit copper mine and SX-EW refinery acquired in late 2025 from Lisbon Valley Mining Company. The company plans to restart mining with autonomous ...
Horowitz-backed firm to revive idled Utah copper mine
MINING.COM reported Mariana Minerals acquired the Centennial copper mine from Lisbon Valley Mining Co. and planned an April 2026 restart with autonomous haul trucks and drills. The company aims to gro...
Mariana targets 20% cost cut at US lithium project
CEO Turner Caldwell told Fastmarkets Mariana is aiming for about a 20% cut in steady-state operating costs at Lithium One by using reinforcement learning to run the plant. The GWh-scale Texas/Louisian...
Select Water Solutions and Mariana Minerals Break Ground on Texas's First Commercial Produced Water Lithium Extraction Facility
JOAQUIN, Texas , Oct. 22, 2025 /PRNewswire/ -- Select Water Solutions, Inc. ("Select", NYSE: WTTR) and Mariana Minerals ("Mariana") today announced the groundbreaking of a pioneering produced water li...
Series A Announcement
Mariana emerged from stealth with a Series A led by Andreessen Horowitz, bringing total capital raised to $85 million. The company said it would develop lithium, copper and nickel projects in the U.S....
Investing in Mariana Minerals
Andreessen Horowitz announced it is backing Mariana Minerals as a full-stack, software-native mining operator targeting 10 mineral projects in 10 years. The post highlights CEO Turner Caldwell's Tesla...