Mariana Minerals reported raising $310 Million in an initial SEC Form D filing, from an offering of $310 Million
Amount Raised
$310 Million
Round Type
Venture
San FranciscoMiningMining TechnologyInvestors
Description
Khosla Ventures has completed a $310 million funding round for Mariana Minerals, a mining startup focused on software solutions for metal extraction. The funding will support the company's expansion into critical minerals such as aluminum and magnesium. CEO Turner Caldwell emphasizes the importance of reducing costs in the modern economy. This financial boost will strengthen Mariana's position in a high-risk supply chain dominated by China.
Quick answer
Mariana Minerals raised $310 Million in a funding round, dated August 3, 2026. Investors: Khosla Ventures. Mariana Minerals is based in San Francisco, California, United States.
- How much did Mariana Minerals raise?
- Mariana Minerals raised $310 Million in a funding round on August 3, 2026.
- Who invested in Mariana Minerals?
- Khosla Ventures is named as investors in this round.
- What does Mariana Minerals do?
- Mariana Minerals is a software-focused mining startup co-founded by Turner Caldwell, Baker Tilney, and Juan Lozano.
- Where is Mariana Minerals based and how big is it?
- Mariana Minerals is based in San Francisco, California, United States. Fundz records about 180 employees.
- Who are the decision-makers at Mariana Minerals?
- Fundz holds 2 contacts at Mariana Minerals, including the Chief People Officer. Names and contact details are shown to Fundz members.
Source: Fundz verified event record.
Who else raised in Mining and Mining Technology around the same time
Companies in the same sectors as Mariana Minerals that raised within 45 days of this round, from Fundz verified event records.
- Hayasa Metals raised $5M on September 17, 2026.
- DynaResource raised $3M (Post-IPO Equity) on September 2, 2026.
- Miata Metals raised $20M (Corporate Round) on August 18, 2026.
- Zacatecas Silver Corp raised $1.2M (Post-IPO Equity) on July 29, 2026.
- FAST Metals raised $4.3M (Pre-Seed) on July 29, 2026.
- Kharrouba Copper Company raised $1.3M (Pre-Seed) on July 2, 2026.
Who to call at Mariana Minerals, and when
A new round usually means Mariana Minerals is about to hire and buy. The teams that reach out first get the meeting.
- An alert the day Mariana Minerals raises, hires an executive or expands, scored against what you sell
- The decision-makers there, with verified emails
- Who you already know at Mariana Minerals, from your own LinkedIn network
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