# Mariana Minerals: Mining & metals, San Francisco, United States

> Mariana Minerals: Mariana Minerals is a software-first, vertically integrated minerals company founded in 2023-2024, with headquarters in San Francisco...

Source: https://millionrounds.com/startup/mariana-minerals (Millionrounds; every figure on the page links to its filing or article)

United States · [Mining & metals startup](https://millionrounds.com/companies)

# Mariana Minerals

Mariana Minerals is a software-first, vertically integrated minerals company founded in 2023-2024, with headquarters in San Francisco, California, and major operations in Houston, Texas.

Funding reported Last round: Series B

Mining & metals San Francisco, United States

Company summary

- **Founded:** 2009 17 years old
- **Team:** 190 51 to 200 people
- **Funding reported:** $420M in dollars
- **Last round:** Series B Aug 2026

How sure we are

- ✓ **Listed** We know it exists and what it does
- 2 **Funding reported** A company dataset reports a raise
- 3 **Observed** A filing or a dated announcement confirms a round

No round for Mariana Minerals has been confirmed by a filing or an announcement yet, so nothing here counts toward an investor's record. [How we decide](https://millionrounds.com/methodology)

## About Mariana Minerals

Mariana Minerals is a software-first, vertically integrated minerals company founded in 2023-2024, with headquarters in San Francisco, California, and major operations in Houston, Texas.

The company is recognized as the world's only software-centric minerals project developer and operator, focusing on transforming the mining industry through advanced technology, including artificial intelligence (AI) and machine learning (ML). Mariana Minerals manages the entire value chain, from proprietary asset identification to mineral rights acquisition and end-to-end project development. The company specializes in producing battery-grade lithium salts, refined copper, and nickel, targeting sectors such as energy, AI infrastructure, and defense technologies. Its proprietary software platform, MarianaOS, enhances operational efficiency and integrates autonomous systems for improved mineral production. With a mission to rebuild the U.S. domestic supply chain for strategic resources, Mariana Minerals aims to set new standards for speed, efficiency, and sustainability in the mining sector. The company has secured over $85 million in funding, enabling it to advance its innovative projects and contribute to national security by ensuring a reliable supply of critical minerals.

## What company datasets say Mariana Minerals raised

Funding, as reported

Reported in all **$420M** in dollars

Last round **Series B**

Last round size **$310M**

Last round date **Aug 2026**

Investors listed **5**

SEC Form D **$384M sold, 2 filings, last Aug 2026**

## Founders and team

From Mariana Minerals's own website: 10 on the team.

- **Turner Caldwell** CEO
- **Angelo Braun** Chief People Officer
- **Baker Tilney** CFO
- **James Hoggard** COO
- **Juan Lozano** CTO
- **Sara Maroofi** Chief of Staff
- **Darian Orozco** VP, Development & Engineering
- **Ian Stewart** VP, Business Operations
- **Kara Evanoff** VP, Commercial & Product
- **Amanda Lee** General Counsel

## On 5 portfolio pages

Investors who name them

- [Greycroft](https://millionrounds.com/fund/greycroft)
- [Earthshot Ventures](https://millionrounds.com/fund/earthshot-ventures)
- [In-Q-Tel](https://millionrounds.com/fund/iqt)
- [Pax Ventures](https://millionrounds.com/fund/pax-ventures)
- [Inception Studio Capital](https://millionrounds.com/fund/inception-studio-capital)

Each firm lists Mariana Minerals on its own website. That is the firm's claim, a weaker thing than a round we watched, but a named source.

## The company, in detail

What they build

Known for

user experience consumers data protection customer engagement manufacturing mining operations management computer & network security email marketing enterprises autonomous fleet deployment mining process automation information technology & services project execution software data security web development cloud computing

Built with from their website

Google Tag Manager Radarstats Amazon CloudFront RSMeans Data Online WordPress.org Compressor CallMiner Eureka i-motor Flow Apache

+8 more

Gem Rain Viewport Meta LinkedIn Ads Box.net JD Edwards World SentenceTransformers Excel4Apps

- **Sector:** Mining & metals
- **Industry code:** NAICS 21229, 2131, SIC 1381
- **Region:** California

## Mining & metals in United States

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- [**Reframe Systems** Andover · founded 2021 *Raised*](https://millionrounds.com/company/reframe-systems)
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- [**DISA Uranium** Casper · founded 2018](https://millionrounds.com/startup/disa-uranium)

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