Brimstone
PrivateLast Round
Grant
Mar 22, 2024
Est. Valuation
$0
Total Funding Raised
$60.86M
Company Overview
Brimstone is a construction materials company that has developed an innovative, carbon-negative process for producing ordinary Portland cement and supplementary cementitious materials using carbon-free calcium silicate rock.
Sector
Energy & Sustainability
Verticals
Advanced Materials, Clean Manufacturing, Green Building, Construction Tech
Business Model
B2B
Customer Profile
Hardware Sales, Government Contracts, Services & Consulting, Subscription SaaS, Usage-Based SaaS, Data as a Service
AI Layer
Non-AI
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Brimstone Comparables
Compare Brimstone with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Sublime Systems | 91% | |
| Fortera | 88% | |
| C-Crete Technologies | 85% |
Brimstone Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Grant | Mar 22, 2024 | ||||
| Series A | Apr 28, 2022 | ||||
| Seed | Nov 16, 2021 | ||||
| Grant | Aug 1, 2021 | ||||
| Grant | Apr 22, 2020 |
Key People
Founding team and executive leadership
Brimstone Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Impact Science | Series A |
| Creative Ventures | Series A |
| Osage University Partners | Grant, Series A |
| Impact Science Ventures | Grant, Series A |
| Breakthrough Energy Ventures | Grant, Seed, Series A |
| Breakthrough Energy Foundation | Seed |
| Collaborative Fund | Grant, Seed, Series A |
Market signals
Structured signals derived from secondary market and firmographic data.
- Dec 11, 2025
Introduced the 'fourth Great Refinery' Vision, expanding product roadmap to include new metal refining processes.
- Aug 6, 2025
Amazon reserves annual volumes of low-carbon cement.
Recent news
Latest coverage and updates
- is_developingJul 6, 2026
Brimstone is developing U.S. Mine-to-Metal aluminum supply chain on Jul 6th '26.
Brimstone Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
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