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Mariana Minerals
San Francisco, US · Founded 2024 · Delaware corporation · 183 employees on LinkedIn · 9 known investors
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Mariana Minerals is a vertically integrated minerals supplier that uses software to source critical minerals for energy, AI, and defense technologies.
Founders & leadership
Mariana Minerals was founded in 2024 by Turner Caldwell, Juan Lozano Van De Ven, and Schuyler (Baker) Tilney.
Board
Investors · 9
How we know: a16z's portfolio · funding news · press coverage · Not right? Tell us
How we know: funding news · Not right? Tell us
How we know: the VCSheet dataset · Not right? Tell us
How we know: Khosla Ventures's portfolio page · a partner's Signal profile · board seat on SEC Form D · the VCSheet dataset · Not right? Tell us
How we know: Washington Harbour Partners's portfolio page · Not right? Tell us
How we know: funding news · Not right? Tell us
Reported raises · per SEC filings
Form D private placements$384M disclosed across 2 rounds · 2025–2026
▶$310.5MraisedAug 2026 · 23 investors · Other EnergyRule 506(b)
- Turner CaldwellExecutive Officer, Director, Promoter
- Juan Lozano Van De VenExecutive Officer, Director, Promoter
- Schuyler (Baker) TilneyExecutive Officer, Director, Promoter
- Erin Price-WrightDirector
- Samir KaulDirector
- Offering amount
- $310.5M
- Amount sold
- $310.5M
- First sale
- Jul 2026
- Incorporated
- Corporation, Delaware, 2024
- Federal exemptions
- 06b
▶$73.5MraisedApr 2026 · 27 investors · Other EnergyRule 506(b)
- Turner CaldwellExecutive Officer, Director, Promoter
- Juan Lozano Van De VenExecutive Officer, Director, Promoter
- Schuyler (Baker) TilneyExecutive Officer, Director, Promoter
- Erin Price-WrightDirector
- Offering amount
- $76M
- Amount sold
- $73.5M
- First sale
- Jun 2025
- Incorporated
- Corporation, Delaware, 2024
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
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Frequently asked questions
- What does Mariana Minerals do?
- Mariana Minerals is a vertically integrated minerals supplier that uses software to source critical minerals for energy, AI, and defense technologies.
- Who founded Mariana Minerals?
- Mariana Minerals was founded by Turner Caldwell, Juan Lozano Van De Ven, Schuyler (Baker) Tilney in 2024.
- Who are Mariana Minerals's investors?
- Mariana Minerals's investors include Andreessen Horowitz, Breakthrough Energy Ventures, Earthshot Ventures, Greycroft, Inception Studio Capital, Khosla Ventures, Washington Harbour Partners, BEV and 1 more.
- How much funding has Mariana Minerals raised?
- Mariana Minerals has disclosed $384M raised across 2 rounds.
- Where is Mariana Minerals headquartered?
- Mariana Minerals is headquartered in San Francisco, US.