/Companies

Brimstone

Oakland, US · Founded 2019 · Delaware corporation · 69 employees on LinkedIn · 17 known investors

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Brimstone develops co-production processes to manufacture cement, steel, aluminum, and other critical minerals from a single feedstock in an integrated facility. The company targets heavy industry producers seeking lower-cost, more sustainable production methods for materials essential to construction and manufacturing.

Founders & leadership

Brimstone was founded in 2019 by Cody Finke and Hugo Leandri.

CFCody Finke
Cody FinkeFounderHe completed his doctoral work at Caltech after undergraduate studies in genetics and chemistry at Carleton College, where he also worked as a teaching assistant and tutor. He was a research fellow at Cyclotron Road from 2019 to 2022, an Activate fellowship program, and has been named to MIT Technology Review's 35 Innovators Under 35 list for work on cement decarbonization.
HL
Hugo LeandriFounderHe co-founded Brimstone in 2019 and served as its CTO through 2024, then as Chief Strategy Officer, after working as a scientist at Caltech and a research affiliate at Berkeley Lab. In 2025 he founded The Red Metal Company, where he is CEO.

Investors · 17

SYSTEMIQreportedLondon

How we know: activate.org · the VCSheet dataset · Not right? Tell us

Also in the syndicate · 3

AmazonAmazon’s Climate Pledge FundFifth Wall Climate Tech

Reported raises · per SEC filings

Form D private placements

$55M disclosed across 1 round · 2022

▶$55MraisedMar 2022 · 13 investors · Construction
Rule 506(b)
Officers, directors & promoters on the filing
  • Cody FinkeExecutive Officer, Director
  • Hugo LeandriExecutive Officer, Director
Offering amount
$55M
Amount sold
$55M
Minimum investment
$200K
Proceeds to insiders
$200K
First sale
Mar 2022
Incorporated
Corporation, Delaware, 2019
Federal exemptions
06b
Full filing on SEC EDGAR ↗

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

Frequently asked questions

What does Brimstone do?
Brimstone develops co-production processes to manufacture cement, steel, aluminum, and other critical minerals from a single feedstock in an integrated facility. The company targets heavy industry producers seeking lower-cost, more sustainable production methods for materials essential to construction and manufacturing.
Who founded Brimstone?
Brimstone was founded by Cody Finke, Hugo Leandri in 2019.
Who are Brimstone's investors?
Brimstone's investors include Accelr8, Breakthrough Energy Ventures, Collaborative Fund, Creative Destruction Lab (CDL), DCVC (Data Collective), Fifth Wall, GVP Climate, ISV and 6 more.
How much funding has Brimstone raised?
Brimstone has disclosed $55M raised across 1 round.
Where is Brimstone headquartered?
Brimstone is headquartered in Oakland, US.