The Grantham Foundation

Carbon Ridge is a company focused on decarbonizing the shipping industry through its innovative technology. It offers a modular onboard carbon capture and storage system designed to provide comprehensive decarbonization solutions for maritime vessels. This platform provides a cost-effective and immediate approach to significantly reduce carbon dioxide and other greenhouse gas emissions from commercial shipping. By enabling shipping companies to adopt a fuel-independent method, Carbon Ridge supports the transition towards more sustainable maritime operations.

Renewable Metals process recovers nearly all of the lithium, nickel, cobalt, copper, and manganese in batteries without causing additional waste.

Applied Carbon is focused on innovative technology that aims to regenerate soils and capture atmospheric carbon for environmental benefit. The company develops mobile pyrolysis systems capable of producing biochar, a charcoal-like substance created from agricultural waste. These systems are designed to operate on-site in urban and peri-urban areas, where they convert biomass waste efficiently. By addressing degraded or blighted land, Applied Carbon's approach not only facilitates organic waste disposal but also enhances soil quality through improved nutrient and water retention, while simultaneously sequestering carbon permanently.

Travertine is a company focused on carbon dioxide removal and industrial chemical production, aiming to mitigate the environmental impact associated with the extraction of elements for renewable energy. The company employs a proprietary electrochemical process that transforms carbon dioxide from the atmosphere into stable carbonate minerals, effectively storing carbon permanently. In addition to carbon capture, this process generates sulfuric acid, which is utilized in critical element extraction and fertilizer production. By recycling sulfate waste to produce sulfuric acid and minimizing chemical waste, Travertine supports more sustainable practices in the mining and fertilizer industries while generating high-quality carbon credits through its direct air capture and mineralization efforts.

Ucaneo is an environmental services company specializing in carbon removal technology. The company has developed an innovative water-based bioreactor that utilizes an enzymatically enhanced biomembrane to capture carbon dioxide from the atmosphere. This technology aims to provide effective solutions for clients seeking to mitigate the impacts of climate change. By focusing on carbon capture, Ucaneo contributes to efforts aimed at reducing greenhouse gas emissions and promoting a sustainable future.

Arca is a leading carbon dioxide removal (CDR) company. Arca accelerates natural process of carbon mineralization, by reacting atmospheric carbon dioxide with ultramafic mine tailings rich in magnesium silicate minerals, such as serpentine and brucite. By leveraging partnerships with mining companies, Arca transforms mine waste into a carbon sink, permanently storing CO₂ as stable carbonate minerals. The company is at the forefront of scaling carbon dioxide removal (CDR) solutions by integrating geochemical expertise, real-time monitoring, and verification methodologies. Arca collaborates with major buyers of carbon removal credits, such as Shopify, Stripe, Watershed and MaRS, and has established formal methodologies for recognizing and quantifying mineralization in voluntary and compliance carbon markets.

Renewable Metals process recovers nearly all of the lithium, nickel, cobalt, copper, and manganese in batteries without causing additional waste.

Avalanche Energy is a fusion energy startup that develops micro-fusion reactors for distributed energy and mobility. The company's modular reactor architecture can be stacked for limitless power applications and energy density, allowing it to offer clean energy while also decarbonizing the planet. It provides quick iterations of design, build, test, and fix cycles, allowing for speedier development and the rapid scaling required by the world.

Ebb Carbon works on a reverse electrochemical ocean deacidification process that captures CO2 from the atmosphere. It delivers a new method of carbon removal that uses electrochemistry to enhance the ocean’s natural ability to safely store CO2 while reducing ocean acidity. Its approach has the potential to be one of the safest, most scalable, and most affordable ways to remove excess CO2 from the atmosphere.

Eden is a leader in sustainable natural resource recovery. They break rocks with electricity to maximize subsurface permeability. Eden believes that a more sustainable approach to natural resource recovery is critical to creating a carbon-neutral future. By using high-voltage electricity and proprietary modeling and reservoir characterization techniques, they can achieve precise fracture permeability enhancement, while preventing the high-water consumption and environmental risks associated with traditional hydraulic fracturing operations. With backing from public and private institutions, Eden’s next-generation rock permeability enhancement technology is being demonstrated in multiple geologies across the world. They are working with industry leaders in geothermal energy, geologic hydrogen, carbon storage, and mining to redefine how we recover Earth’s natural resources. To learn more about Eden and their groundbreaking technology, visit edengeopower.com

Type One Energy Group is dedicated to delivering sustainable and affordable fusion power. Established in 2019 by a team of renowned fusion scientists and experienced business leaders, the company focuses on developing advanced stellarator fusion energy systems. Utilizing proven manufacturing techniques, modern computational physics, and high-field superconducting magnets, Type One Energy aims to create optimized reactor designs. Its FusionDirect development program seeks to establish a fusion power plant within the next decade through a low-risk, efficient approach that emphasizes partnerships and capital efficiency. By advancing fusion technology, Type One Energy aspires to provide reliable and abundant power to meet global energy demands.

Arca is a leading carbon dioxide removal (CDR) company. Arca accelerates natural process of carbon mineralization, by reacting atmospheric carbon dioxide with ultramafic mine tailings rich in magnesium silicate minerals, such as serpentine and brucite. By leveraging partnerships with mining companies, Arca transforms mine waste into a carbon sink, permanently storing CO₂ as stable carbonate minerals. The company is at the forefront of scaling carbon dioxide removal (CDR) solutions by integrating geochemical expertise, real-time monitoring, and verification methodologies. Arca collaborates with major buyers of carbon removal credits, such as Shopify, Stripe, Watershed and MaRS, and has established formal methodologies for recognizing and quantifying mineralization in voluntary and compliance carbon markets.

nT-Tao is building a compact fusion reactor that will generate 10-20 MW of electricity. The reactor is highly scalable and will be about the size of a shipping container, ensuring clean fusion energy wherever needed. The reactor’s scalability and affordability will make it suitable for various power needs, ranging from industrial and manufacturing facilities to small towns and off-grid locations. This scalability coupled with the ability for rapid deployment, positions nT-Tao’s reactor as a versatile and adaptable fusion energy solution. nT-Tao’s unique solution relies on a proprietary plasma heating method which is expected to reach 1000 times higher density than other fusion reactors, thereby making its fusion reaction 1 million times more effective. nT-Tao’s ability for quick development iterations and its groundbreaking approach, dramatically reduces the size, cost, and complexity of fusion energy reactors. Co-founded by Oded Gour-Lavie, Doron Weinfeld, and Boaz Weinfeld, nT-Tao’s mission is to develop a unique nuclear fusion technology that will enable the world to transition towards a cleaner, decarbonized, sustainable, and advanced future.

Summit Nanotech Corporation is a cleantech company based in Calgary, Canada, that specializes in innovative lithium extraction methods aimed at supporting the global energy transition. Founded in 2018, the company has developed a patented direct lithium extraction (DLE) technology that offers a more sustainable and environmentally friendly approach compared to traditional extraction methods. By collaborating with mining companies and lithium asset owners in Chile and Argentina, Summit Nanotech aims to conserve natural resources while optimizing lithium production operations. Its focus on providing cost-effective solutions positions Summit Nanotech as a key player in the lithium supply chain, addressing industry challenges while minimizing environmental impact.

Marble is a climate tech venture studio. Our north star is to erase billions of tons from annual greenhouse gas emissions and create a thriving future. We partner with scientists, engineers and operators to create deeptech companies that can solve hard climate problems, and reshape multi billion $ industries. Together, we co-create radical solutions that slash emissions in hard to abate sectors, remove carbon from the atmosphere, and cool the planet. We shape the most promising ideas into new companies, funded by Marble. We're proud to be backed by leading climate investors across Europe and the US.

Carboniferous develops anoxic biological carbon technology aimed at sequestering carbon from excess terrestrial biomass. The company's approach accelerates natural climate recovery by transporting excess biomass to marine basins where it can be stored in anoxic zones. This process helps eliminate decomposition, effectively capturing and storing embodied carbon dioxide. By leveraging existing supply chains, Carboniferous facilitates the movement of biomass, contributing to enhanced carbon management and climate mitigation efforts.

Paebbl is a carbon storage company founded in 2021 by Pol Knops, Jane Walerud, Marta Sjögren, and Andreas Saari. The company focuses on capturing carbon dioxide from industrial facilities or directly from the atmosphere to produce carbon-negative building materials. By specializing in carbon dioxide mineralization, Paebbl significantly accelerates this process while minimizing energy consumption. This innovative approach enables the development of sustainable construction materials, addressing the construction sector's substantial contribution to global carbon emissions, which accounts for 38% of the total. Through its efforts, Paebbl aims to provide clients with eco-friendly raw materials that help combat climate change.

Carbon Ridge is a company focused on decarbonizing the shipping industry through its innovative technology. It offers a modular onboard carbon capture and storage system designed to provide comprehensive decarbonization solutions for maritime vessels. This platform provides a cost-effective and immediate approach to significantly reduce carbon dioxide and other greenhouse gas emissions from commercial shipping. By enabling shipping companies to adopt a fuel-independent method, Carbon Ridge supports the transition towards more sustainable maritime operations.

Banyu Carbon focuses on developing a novel photocatalytic approach to marine carbon dioxide removal. It was founded in 2022 and is headquartered in Seattle, Washington.

Fervo Energy, founded in 2017 and based in San Francisco, California, specializes in the development and commercialization of next-generation geothermal power technology. The company focuses on owning, developing, and operating geothermal assets to generate clean, carbon-free energy in new locations. By leveraging innovations in geoscience, Fervo Energy aims to accelerate the transition to a sustainable energy future, positioning itself as a key player in the evolution of the electric grid. Its proprietary technology serves as a dispatchable foundation for achieving a fully clean energy system, enabling clients to enhance productivity and scalability in energy production.

Zanskar is a geothermal exploration and technology company focused on accelerating the discovery and development of geothermal energy resources. The company utilizes a predictive platform that leverages extensive data sets and advanced subsurface characterization technology. By integrating artificial intelligence and sophisticated sensing techniques, Zanskar enhances the exploration process, allowing clients to uncover previously unknown geothermal resources while minimizing associated risks. Through its innovative approach, Zanskar aims to contribute to the growth and sustainability of geothermal energy as a viable alternative energy source.

Electrified Thermal Solutions replace fossil fuels with renewable heat in every furnace, turbine, boiler, and kiln to decarbonize industry. Electrified Thermal Solutions started at MIT in the noisy laboratory basement of the Department of Nuclear Science and Engineering. The goal was simple: start an energy revolution. Founded in 2021, the company is based in Medford, Massachusetts.

Travertine is a company focused on carbon dioxide removal and industrial chemical production, aiming to mitigate the environmental impact associated with the extraction of elements for renewable energy. The company employs a proprietary electrochemical process that transforms carbon dioxide from the atmosphere into stable carbonate minerals, effectively storing carbon permanently. In addition to carbon capture, this process generates sulfuric acid, which is utilized in critical element extraction and fertilizer production. By recycling sulfate waste to produce sulfuric acid and minimizing chemical waste, Travertine supports more sustainable practices in the mining and fertilizer industries while generating high-quality carbon credits through its direct air capture and mineralization efforts.

Banyu Carbon focuses on developing a novel photocatalytic approach to marine carbon dioxide removal. It was founded in 2022 and is headquartered in Seattle, Washington.

Brilliant Planet focuses on the production of algal biomass as a sustainable solution for carbon sequestration at a gigaton scale. The company utilizes open-air pond-based systems to cultivate extensive quantities of microalgae on coastal desert land, employing a natural growth process that does not require fresh water. This innovative approach not only contributes to ocean and air health but also addresses the increasing demand for protein. By leveraging the potential of algae, Brilliant Planet offers an affordable and effective method for permanently and quantifiably removing carbon from the atmosphere.

Heirloom specializes in direct air capture technology aimed at enhancing the natural absorption of carbon dioxide from the atmosphere. The company's innovative system accelerates the ability of limestone to capture CO2, allowing for its permanent storage underground. By operating on renewable energy, Heirloom's technology promotes carbon capture and utilization at a large scale, with the goal of removing significant amounts of atmospheric CO2. This approach not only minimizes secondary impacts but also supports clients in restoring the atmosphere through natural processes.

Arca is a leading carbon dioxide removal (CDR) company. Arca accelerates natural process of carbon mineralization, by reacting atmospheric carbon dioxide with ultramafic mine tailings rich in magnesium silicate minerals, such as serpentine and brucite. By leveraging partnerships with mining companies, Arca transforms mine waste into a carbon sink, permanently storing CO₂ as stable carbonate minerals. The company is at the forefront of scaling carbon dioxide removal (CDR) solutions by integrating geochemical expertise, real-time monitoring, and verification methodologies. Arca collaborates with major buyers of carbon removal credits, such as Shopify, Stripe, Watershed and MaRS, and has established formal methodologies for recognizing and quantifying mineralization in voluntary and compliance carbon markets.

Carbon America is a developer of carbon capture and sequestration (CCS) technology aimed at significantly reducing carbon dioxide emissions. The company focuses on capturing and sequestering large volumes of carbon dioxide from industrial sources, utilizing a multi-strategy approach that emphasizes cost efficiency and rapid deployment. By combining a team of skilled engineers, developers, and financiers, Carbon America operates as a vertically integrated entity designed to scale effectively. This innovative approach not only enhances the efficiency of CCS processes but also positions the company as a leader in the effort to combat global warming by providing solutions that are both effective and economically viable for its clients.

CarbonBuilt is a clean technology company focused on carbon capture and utilization, specifically within the concrete industry. The company has developed innovative technologies aimed at significantly reducing carbon emissions associated with concrete production. Its flagship product, Reversa® Binder, serves as a low-carbon alternative to traditional cement, allowing for the creation of concrete with a much lower carbon footprint. By injecting carbon dioxide emissions from industrial sources into its proprietary low-carbon concrete formulations, CarbonBuilt enables industries to meet their carbon reduction targets while ensuring that their products comply with industry specifications. This approach not only helps in driving greenhouse gas reductions but also promotes the cost-effective use of carbon dioxide and other industrial waste.

NovoNutrients is focused on converting industrial waste carbon dioxide emissions into high-value protein and additives for food and feed. The company has developed a fermentation platform that utilizes proprietary microbes and advanced gas fermentation systems to transform CO2, along with hydrogen and oxygen, into safe and natural single-cell protein ingredients. This innovative approach enables the food industry to access sustainable protein sources, addressing the needs of a growing global population while also contributing to climate change mitigation through effective carbon capture and utilization.

Kula Bio specializes in sustainable, biological solutions for modern agriculture. It energizes nitrogen-fixing microbes to produce organic fertilizer. By rewiring the energy flow from the sun to soil, they are disrupting synthetic fertilizer to eliminate the division between affordable practices and stewardship of our land, sea, and air. The company was founded in 2018 and is headquartered in Somerville, Massachusetts.

Infinium is a provider of electrofuels that produces synthetic fuels from renewable energy and waste carbon dioxide. The company's ultra-low carbon electrofuels serve as drop-in replacements for traditional petroleum-derived products, allowing for immediate integration into existing transportation systems and chemical processes, such as plastics production. This approach significantly reduces greenhouse gas emissions and helps clients meet carbon reduction targets without the need for extensive capital investment or time-consuming upgrades. Through its innovative solutions, Infinium aims to decarbonize the transportation sector and contribute to a more sustainable future.

nT-Tao is building a compact fusion reactor that will generate 10-20 MW of electricity. The reactor is highly scalable and will be about the size of a shipping container, ensuring clean fusion energy wherever needed. The reactor’s scalability and affordability will make it suitable for various power needs, ranging from industrial and manufacturing facilities to small towns and off-grid locations. This scalability coupled with the ability for rapid deployment, positions nT-Tao’s reactor as a versatile and adaptable fusion energy solution. nT-Tao’s unique solution relies on a proprietary plasma heating method which is expected to reach 1000 times higher density than other fusion reactors, thereby making its fusion reaction 1 million times more effective. nT-Tao’s ability for quick development iterations and its groundbreaking approach, dramatically reduces the size, cost, and complexity of fusion energy reactors. Co-founded by Oded Gour-Lavie, Doron Weinfeld, and Boaz Weinfeld, nT-Tao’s mission is to develop a unique nuclear fusion technology that will enable the world to transition towards a cleaner, decarbonized, sustainable, and advanced future.

Zap Energy, Inc., founded in 2017 and headquartered in Seattle, Washington, specializes in the design and manufacture of sheared-flow stabilized Z-Pinch fusion reactors for power generation. The company’s innovative technology utilizes electric currents to create magnetic fields that confine and compress plasma, enabling efficient energy production through nuclear fusion. This approach offers a low-carbon, cost-effective, and flexible power source while requiring less capital investment compared to traditional fusion methods. By focusing on compact and scalable fusion technology, Zap Energy aims to advance sustainable energy solutions and improve the economics of fusion energy.

Solidia Technologies, Inc. is an advanced materials company focused on developing innovative processes for creating building and construction products, particularly in the cement and concrete industries. Founded in 2008 and based in Piscataway, New Jersey, Solidia's technology captures and stores carbon dioxide (CO2) during the production process, transforming it into a usable element that enhances product performance. By utilizing low energy processes and waste materials, Solidia's solutions significantly reduce environmental impact while offering superior performance compared to traditional cement and concrete. The company also integrates artificial intelligence into its production methods to minimize waste, improve quality control, and optimize systems, helping clients achieve lower carbon emissions and a reduced carbon footprint.