Fundraising Fox

Mariana Minerals

San Francisco, US · Founded 2024 · Delaware corporation · 183 employees on LinkedIn · 8 known investors

Mariana Minerals is a vertically integrated minerals supplier that uses software to source critical minerals for energy, AI, and defense technologies.

AI & Machine LearningEnergyNew Materials

Founders & leadership

Mariana Minerals was founded in 2024 by Turner Caldwell, Juan Lozano Van De Ven, and Schuyler (Baker) Tilney.

TCTurner Caldwell
Turner CaldwellinCo-Founder and CEO
JL
Juan Lozano Van De VenCo-founder
S(
Schuyler (Baker) TilneyCo-founder

Board

EPErin Price-Wright
Erin Price-Wrightin𝕏Board directorInvestor at Index Ventures
SKSamir Kaul
Samir Kaulin𝕏Board directorInvestor at Khosla Ventures

Investors · 8

Andreessen HorowitzMenlo Park · $500K – $50M
Breakthrough Energy VenturesBoston · $500K – $50M
Earthshot VenturesSydney · $100K – $5M
GreycroftNew York · $100K – $5M
Inception Studio CapitalSilicon Valley · $100K – $1.5M
Khosla VenturesMenlo Park · $5K – $50M
BEVreportedBoston
Index VenturesreportedSan Francisco · $540K – $10.8Mvia Erin Price-Wright · board

Reported raises · per SEC filings

Form D private placements

$384M disclosed across 2 rounds · 2025–2026

▶$310.5MraisedAug 2026 · 23 investors · Other Energy
Rule 506(b)
Officers, directors & promoters on the filing
  • 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
Full filing on SEC EDGAR ↗
▶$73.5MraisedApr 2026 · 27 investors · Other Energy
Rule 506(b)
Officers, directors & promoters on the filing
  • 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
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Competitors · 1

by search overlap
Mining Technology19 shared keywordsMining Technology is an online news and information publication covering the mining industry, reporting on projects, contracts, patents, and industry trends. It serves professionals and stakeholders in the mining sector.

Companies competing with Mariana Minerals for the same Google search keywords, organic and paid, via search-intersection analysis.

In the news

Mariana Minerals, Venus Aerospace top Houston's venture capital fundraising deals in quieter Q2 - Houston Business Journalbizjournals.com · Jul 2026This Tesla Veteran Is Running A Copper Mine With AI-Powered Robotsforbes.com · Apr 2026Scoop: Mariana Minerals preparing to raise up to $100M for automated miningaxios.com · Mar 2026Silicon Valley considers other critical mineralsminingmagazine.com · Jul 2025Investing in Mariana Minerals | Andreessen Horowitza16z.com · Jul 2025

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, BEV, Index Ventures.
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.