Startup · United States
Mariana Minerals
HQ San Francisco, United StatesFounded 2024
AI-driven mining and mineral refining company.
Funding2 rounds · ~$384M
- Disclosed
- ~$384M
- Latest
- $310MSeries B · Aug 3, 2026
| Announced | Stage | Valuation | Basis |
|---|---|---|---|
| Jul 21, 2025 | Series A | $278M | Post-money |
| Aug 3, 2026 | Series B | $1.50B | Basis not stated |
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Aug 3, 2026 | Series B | $310M | $1.50B? | Khosla Ventures | Andreessen Horowitz, Breakthrough Energy Ventures, Greenoaks, In-Q-Tel, Pax Ventures, StepStone Group, Washington Harbour Partners | Confirmed |
| Jul 21, 2025 | Series A | ~$73.5M | $278M | Andreessen Horowitz | Breakthrough Energy Ventures, Khosla Ventures | Confirmed |
- Series BLed by Khosla VenturesWith Andreessen Horowitz, Breakthrough Energy Ventures, Greenoaks, In-Q-Tel, Pax Ventures, StepStone Group, Washington Harbour PartnersValuation $1.50B?Confirmed$310MAug 3, 2026
- ~$73.5MJul 21, 2025
Totals add known amounts using recorded USD conversions where available; other currencies are shown separately. A ~ marks an estimated amount.
Supply chain1 facility
Facilities1
| Facility | Kind | Location | Status | Confidence |
|---|---|---|---|---|
| Copper One Mine | Mine | Utah, United States | Operating · 2026 | Reported |
- Copper One MineMine · Utah, United StatesOperating · 2026Reported
Sources14
Profile3
- 1
- 2
- 3CompanyMariana Minerals
Supports Organization · country, Organization · hq city
“**Address:** San Francisco, CA 94107, US”
Funding8
- 4Regulatory filingMariana Minerals Co. - SEC Form D (0002123886-26-000004)
U.S. Securities and Exchange Commission · Aug 6, 2026 · Supports Funding round
“Total Amount Sold $310,499,477 USD”
- 5
Tectonic · Aug 4, 2026 · Supports Funding round
“New investors Greenoaks, Halo Fund, Pax Ventures, StepStone Group, BHP Ventures, Washington Harbour Partners, Greycroft, General Innovation Capital Partners, Mitsubishi Corporation, In-Q-Tel (IQT), and Earthshot Ventures”
- 6
PR Newswire (Yahoo Finance) · Aug 3, 2026 · Supports Funding round · amount, Funding round · announced on
“Mariana Minerals Raises $310 Million Series B Led by Khosla Ventures”
- 7
Fortune · Aug 3, 2026 · Supports Funding round · post money valuation usd
“Mariana has now raised $400 million total and is valued at $1.5 billion.”
- 8Regulatory filingMariana Minerals Co. - SEC Form D (0002123886-26-000001)
U.S. Securities and Exchange Commission · Apr 7, 2026 · Supports Funding round · amount
“Total Amount Sold $73,529,982 USD”
- 9
Forge Global · Jul 21, 2025 · Supports Funding round · post money valuation usd
“07/21/2025 Series A-1 $65.7M $11.25 $278.31M”
- 10CompanySeries A Announcement
Mariana Minerals · Jul 21, 2025 · Supports Funding round
“led by a16z, with continued support from seed investors Breakthrough Energy Ventures and Khosla Ventures”
- 11
Tectonic · Supports Funding round · amount, Organization
“AI-powered mining and refining company Mariana Minerals announced that it's raised a $310M Series B led by Khosla Ventures, bringing total funding to about $400M.”
Supply chain2
- 12
Mining Magazine · Apr 28, 2026 · Supports Facility
“Silicon Valley-backed Mariana Minerals has restarted the Utah copper mine Copper One, formerly known as Lisbon Valley, as an autonomous-first producer of the red metal.”
- 13
San Juan Record · Apr 28, 2026 · Supports Facility
“Local, state, and federal officials gathered in Lisbon Valley to celebrate the reopening of the Copper One Mine, marking a significant step forward for economic growth and job creation in the area.”
People1
- 14OtherBlack Flag 100.2
Black Flag · Supports Organization, Role
“Mariana Minerals is a software-first critical minerals company using AI and automation to unify mining, refining, and capital execution on one platform. As”
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