Brimstone Unicorn Score: 63/100
Oakland, United StatesBrimstone is a cleantech startup that has developed a patented co-production process, the "Brimstone Rock Refinery," to decarbonize the production of essential industrial materials. By refining a single, abundant rock, it produces carbon-negative cement, steel, aluminum, and other critical minerals more efficiently and sustainably, aiming to transform global supply chains.
Valuation track record
- First screened
- May 5, 2026
- Entry valuation
- $220M
- Current valuation
- $220M
Latest valuation verified from Live re-screening on May 5, 2026. Updated quarterly from public funding announcements.
Founders
Cody Finke
CEO
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Frequently asked
What is Brimstone's unicorn score?
Brimstone has a Unicorn Screener score of 63/100, classified as "Promising". Recommended action: watchlist.
What is Brimstone's current valuation?
Brimstone's most recently verified valuation is $220M, last checked on May 5, 2026 (source: Live re-screening).
What sector is Brimstone in?
Brimstone operates in the CleanTech sector and is headquartered in Oakland, United States.
What accelerator is Brimstone part of?
Brimstone is a Unreasonable Group portfolio company.
When was Brimstone first screened?
Brimstone was first screened by Unicorn Screener on May 5, 2026, with an entry valuation of $220M.