Mariana Minerals, which builds and operates mines using its MarianaOS software platform, raised a $310M Series B, bringing its total funding to $400M (Allie Garfinkle/Fortune)

<a href="https://fortune.com/2026/08/03/power-ai-khosla-a16z-bet-startup-reinvent-mining-mariana-minerals/"><img align="RIGHT" border="0" hspace="4" src="http://www.techmeme.com/260803/i25.jpg" vspace="4" /></a> <p><a href="https://www.techmeme.com/260803/p25#a260803p25" title="Techmeme permalink"><img height="12" src="http://www.techmeme.com/img/pml.png" style="border: none; padding: 0; margin: 0;" width="11" /></a> Allie Garfinkle / <a href="http://www.fortune.com/">Fortune</a>:<br /> <span style="font-size: 1.3em;"><b><a href="https://fortune.com/2026/08/03/power-ai-khosla-a16z-bet-startup-reinvent-mining-mariana-minerals/">Mariana Minerals, which builds and operates mines using its MarianaOS software platform, raised a $310M Series B, bringing its total funding to $400M</a></b></span>&nbsp; &mdash;&nbsp; The last century was fueled by oil and gas.&nbsp; Turner Caldwell is betting the next century runs on metals.</p>