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§ Private Profile · Montréal, QC, Canada
develops mineral processing solutions for mining, enabling critical mineral production and carbon mineralization.
Based in Montréal, Québec, Exterra Carbon Solutions develops advanced mineral processing and carbon mineralization technologies that enable mining companies to extract critical minerals while permanently converting carbon dioxide into stable carbonates. The company operates a scalable technology licensing model aimed at industrial emitters, direct air capture operators, and critical mineral producers seeking to reduce environmental impact and monetize carbon credits. Operating with a core team of 13 employees, the enterprise has secured approximately $32 million CAD in total funding to commercialize its circular chemical regeneration platform. This capitalization includes a recent $20 million USD Series A financing round co-led by Clean Energy Ventures and BDC Capital, with additional strategic participation from Investissement Québec and Propulia Capital. Exterra Carbon Solutions, which recently initiated a corporate rebranding to Exterra Technologies, was founded in 2021 by Olivier Dufresne and David Fennell.
Exterra Carbon Solutions has raised $15.0M across 1 funding round.
Exterra Carbon Solutions has raised $15.0M in total across 1 funding round.
Exterra Carbon Solutions has raised $15.0M across 1 funding round. Most recently, it raised $15.0M Series A in May 2025.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| May 1, 2025 | $15M Series A | Clean Energy Ventures, BDC Capital | BP Ventures, Riverstone Ventures, Investissement Québec, Kinetics, MOL Switch, Quebec Government | Announced |
Exterra Carbon Solutions is a Montreal-based cleantech company founded in 2021 that develops negative emissions technology to transform mineral waste, particularly asbestos mine tailings (AMT), into permanent carbon sinks and high-value low-carbon materials.[1][2][3] It serves industrial CO₂ emitters, direct-air-capture (DAC) firms, mineral waste producers, and carbon credit buyers by providing turnkey CO₂ mineralization solutions, generating verifiable carbon credits, and producing co-products like nickel concentrate for EV batteries, magnesium oxide, and amorphous silica for sustainable building materials.[1][2][3][5] The company's proprietary LOW™ (Low-carbon Oxide from Waste) and ROC™ (Reactive Oxide to Carbonate) processes enable engineered mineral carbonation powered by Quebec's low-carbon hydroelectric grid, addressing hazardous waste remediation while supporting decarbonization; key growth includes a $20M CAD Series A in 2024 and Hub I, the world's largest asbestos mitigation plant set for 2027 construction with 300,000+ tons annual capacity.[3][4][5]
Exterra Carbon Solutions, formerly ESG Natural Resources, was co-founded in 2021 in Montreal, Canada, by mining veterans including CEO Olivier Dufresne and Chief Strategy Officer David Fennell, backed by a team with over 125 years of experience developing 14 mines globally.[1][3][6] The idea emerged from leveraging Quebec's vast 800 million tonnes of AMT—a hazardous legacy from asbestos mining—into a circular solution for CO₂ storage and critical minerals, evolving from early tech validation (2021-2024) with DAC partners like Deep Sky (2,500-tonne offtake) and Airhive to industrial-scale hubs.[1][5][6] Pivotal moments include a $14.5M USD Series A in 2024 led by Clean Energy Ventures and BDC Capital—enabling board seats and commercialization—and pre-purchase agreements like with Frontier Climate, marking its shift toward net-zero mining applications.[3][4][5]
Exterra rides the carbon dioxide removal (CDR) and critical minerals for electrification trends, capitalizing on global net-zero mandates and EV battery demand amid supply chain vulnerabilities.[1][3][5] Timing aligns with rising DAC scale-up, mining waste regulations, and Quebec's AMT reserves enabling North America's shortest nickel chains—countering geopolitical risks in sourcing.[3][4] Market forces like carbon credit markets, U.S. Inflation Reduction Act incentives, and circular economy policies favor it, turning liabilities into assets and influencing ecosystems by proving mining's role in decarbonization via integrated hubs that blend remediation, sequestration, and materials production.[2][5]
Exterra is poised to launch Hub I in 2027, scaling to industrial CDR while expanding LOW™/ROC™ to other wastes, potentially dominating AMT processing and nickel/silica markets with 2025 DAC initiatives and partnerships driving revenue.[3][5] Trends like CDR demand growth (e.g., XPRIZE momentum) and critical minerals shortages will accelerate its path, evolving influence from niche validator to global standard-setter in sustainable mining—exemplifying how waste tech pioneers an equitable net-zero future.[4][5]
Exterra Carbon Solutions has raised $15.0M in total across 1 funding round.
Exterra Carbon Solutions's investors include Clean Energy Ventures, BDC Capital, BP Ventures, Riverstone Ventures, Investissement Québec, Kinetics, MOL Switch, Quebec Government.