How much has Brimstone raised?
Brimstone has About $60M disclosed venture funding plus $189M DOE award announced in 2024, with the latest disclosed financing described as $55M Series A in March 2022. Not disclosed
- Total raised
- About $60M disclosed venture funding plus $189M DOE award announced in 2024
- Disclosed rounds
- 3 disclosed major rounds
- Latest round
- $55M Series A in March 2022
- Latest valuation
- Not disclosed
- First raised
- undisclosed early rounds, Apr 2020
- Notable backer
- Breakthrough Energy Ventures
Brimstone's funding rounds
Brimstone's disclosed funding has moved from technical validation toward pilot plant, team growth, process scale-up, and commercial demonstration.
- Apr 2020Early funding - valuation not disclosedundisclosed early rounds led by early climate investors.
- Mar 2022Series A - valuation not disclosed$55M led by Breakthrough Energy Ventures and DCVC-linked syndicate.
- Mar 2024DOE Industrial Demonstrations award - non-dilutive award announced$189M led by U.S. Department of Energy.
How much has Brimstone raised in total?
About $60M disclosed venture funding plus $189M DOE award announced in 2024 is the best disclosed total used in this profile. It includes undisclosed early rounds Early funding, $55M Series A, $189M DOE Industrial Demonstrations award.
Because private-company databases can disagree, this profile prioritizes company announcements, investor posts, and named press releases over opaque estimates.
Who are Brimstone's investors?
Named backers include Breakthrough Energy Ventures, DCVC, Collaborative Fund, Amazon Climate Pledge Fund, Fifth Wall, and S2G. These investors are relevant because they bring climate, industrial, software, infrastructure, or strategic-market experience to the company.
Why did the valuation move or remain undisclosed?
Valuation has not been publicly confirmed, so movement should be inferred only from round size, strategic investors, commercial traction, and technical milestones. Hardware and climate-infrastructure companies often disclose capital and offtake before they disclose price-per-share valuation.
Is Brimstone profitable, and will it IPO?
Brimstone has not disclosed profitability or IPO timing. The nearer-term milestone is commercialization, deployments, and repeatable unit economics rather than a public listing.
What does Brimstone's funding mean if you sell into them?
The funding supports pilot plant, team growth, process scale-up, and commercial demonstration. Sellers should map outreach to cement producers, building-materials companies, industrial project developers, government programs, critical-minerals buyers, and construction procurement teams, with proof points around reliability, compliance, implementation speed, and measurable climate or operating impact.
As of June 2026.Sources:Activate Brimstone Series ADCVC Brimstone DOE awardTracxn Brimstone profile
Brimstone — frequently asked questions
