# Mariana Minerals Raises $310M Series B Led by Khosla for Critical Minerals

On August 3, 2026, per PR Newswire, critical minerals development and production company Mariana Minerals raised $310M in a Series B led by Khosla Ventures with a16z, Breakthrough Energy Ventures and Mitsubishi Corporation. The company was co-founded in 2024 by Caldwell, Baker Tilney and Juan Lozano.



Canonical: https://uniquebase.ai/news/25ac056e-0209-432a-9648-939d9c387eb7
Stable identifier: 25ac056e-0209-432a-9648-939d9c387eb7
Snapshot captured: 2026-10-20T18:19:32.670Z
English updated: 2026-10-20T18:21:32.462Z

## Connected profiles

- [Andreessen Horowitz](/institutions/andreessen-horowitz)
- [Breakthrough Energy Ventures](/institutions/breakthrough-energy-ventures)
- [Khosla Ventures](/institutions/khosla-ventures)
- [Mariana Minerals](/companies/mariana-minerals)
- [Mitsubishi Corporation](/institutions/mitsubishi-corporation)

## Sources

- https://www.prnewswire.com/news-releases/mariana-minerals-raises-310-million-series-b-led-by-khosla-