United States · 
Who invested in Mariana Minerals?
Mariana Minerals's investors include Y Combinator, Andreessen Horowitz, Khosla Ventures, Greycroft and Greenoaks, and 1 more on record.
2027
$74MRound$310MSeries B
United States · Series B startup
Who invested in Mariana Minerals
Funding summaryUpdated 26 Oct 2026
$384Mraised across 2 rounds since 2026, from 2 sources
$74MRound$310MSeries B
- Latest round
- Series B, $310MAug 2026
- Step-upi
- 4.2×
- Investors
- 6
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Round, $74M Apr 2026
- Biggest round
- $310M Series B · Aug 2026
- Between rounds
- 4 months from the last two
The rounds
- Aug 2026Series B$310M6 new
Source recordedSEC filing: $310M sold
- Apr 2026Round$74M
No investor was named in the report.
Filed with the SEC (Form D); no report of this raise yetSEC filing: $74M sold, first sale Apr 2026
Founders and team
From Mariana Minerals's own website: 10 on the team.
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 4 firms list Mariana Minerals as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Mariana Minerals
How much has Mariana Minerals raised?
Mariana Minerals has raised $384M across 2 rounds since 2026.
When did Mariana Minerals last raise?
Mariana Minerals's most recent round was a Series B of $310M in Aug 2026.
What was Mariana Minerals's biggest round?
Its most recent round, $310M in Aug 2026, is also its largest on record.
Who backed Mariana Minerals first?
Mariana Minerals's first round on record, in Aug 2026, was backed by Y Combinator, Andreessen Horowitz and Khosla Ventures and 3 others.
What stage is Mariana Minerals at?
Mariana Minerals's latest named round is a Series B, in Aug 2026.
Where is Mariana Minerals based?
Mariana Minerals is based in the United States.
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