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.

Allegro Energy is a developer of energy storage technology focus on sustainable solutions for a zero carbon economy.

Switch Bioworks is a biofertilizer company that focuses on creating sustainable nitrogen fertilizers by genetically reprogramming naturally occurring symbiotic microbes. These engineered microbes function as controlled fertilizer-producing mini-factories located at the roots of plants. This innovative approach provides farmers with a cost-effective and environmentally friendly alternative to traditional chemical nitrogen fertilizers, enhancing agricultural productivity while minimizing ecological impact.

Renewable Metals is a company that specializes in recycling end-of-life batteries. It employs a proprietary process to recover nearly all the lithium, nickel, cobalt, copper, and manganese from these batteries, ensuring minimal waste. This service enables clients to produce new batteries using recycled materials, thereby reducing waste and promoting sustainability.

InventWood, established in 2016 by Amy Gong in College Park, Maryland, specializes in the production of innovative cellulose-based materials aimed at enhancing thermal energy efficiency. The company focuses on creating high-performance, cost-effective, and environmentally sustainable wood-based solutions that offer benefits such as energy efficiency, sunlight guiding, and reduced weight for improved safety and installation. By developing these advanced materials, InventWood aims to contribute to carbon-negative construction practices and promote sustainability for future generations.

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.

Edacious is a Public Benefit Corporation that focuses on developing a food verification system based on radical transparency. This innovative platform aims to foster a nourishing and sustainable agri-food system by prioritizing the verification of food quality. Edacious serves the packaged goods, retail, and supply chain industries, providing businesses with technology that enhances product integrity while benefiting the environment. Through its commitment to transparency, Edacious seeks to improve the overall outcomes of the agri-food sector.

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.

Ocean Rainforest, Inc. is a company based in Santa Barbara, California, that specializes in cultivating seaweed in open ocean installations. Established in 2007, the company has developed a structural system for the cultivation of macroalgae in pristine ocean waters. Ocean Rainforest offers a range of premium, fully traceable seaweed products aimed at food and cosmetic producers. These products are recognized for their health benefits, containing beneficial proteins, antioxidants, essential minerals, dietary fibers, and polyunsaturated fatty acids. The company also manages onshore processes to ensure that the seaweed is stored in a stable condition, thereby maintaining its quality and nutritional value.

Renewable Metals is a company that specializes in recycling end-of-life batteries. It employs a proprietary process to recover nearly all the lithium, nickel, cobalt, copper, and manganese from these batteries, ensuring minimal waste. This service enables clients to produce new batteries using recycled materials, thereby reducing waste and promoting sustainability.

Cache Energy is focused on developing advanced energy storage technology aimed at providing a cleaner alternative to fossil fuels. The company specializes in ultra-long duration energy storage solutions through a thermo-chemical process that allows for the storage of energy for extended periods, with minimal loss. This non-toxic and non-flammable technology is designed for easy transportation, making it suitable for various industrial applications. By addressing the need for sustainable energy storage, Cache Energy aims to contribute to a more environmentally friendly energy landscape.

Avalanche Energy is a fusion energy startup focused on developing compact micro-fusion reactors for various applications, including distributed energy, mobility, and space propulsion. The company utilizes a unique modular reactor architecture that can be stacked to provide scalable and limitless power solutions. By harnessing a self-sustaining fusion chain reaction, Avalanche Energy aims to deliver carbon-free energy while ensuring safety and eliminating long-lived radioactive waste. The company emphasizes rapid design, build, test, and fix cycles to facilitate quick development and scalability, addressing the increasing global demand for clean energy solutions.

Ebb Carbon specializes in carbon removal technology that focuses on capturing atmospheric carbon dioxide through a reverse electrochemical ocean deacidification process. By utilizing low-carbon electricity, the company pumps acid out of the ocean, enhancing its natural ability to safely store carbon dioxide while simultaneously reducing ocean acidity. This innovative approach aims to provide a safe, scalable, and cost-effective solution for removing excess carbon dioxide from the atmosphere. Ebb Carbon's method represents a promising advancement in addressing climate change and improving ocean health.

Eden is focused on developing a sustainable platform for natural resource recovery, aiming to create a carbon-neutral future. The company has introduced a novel method known as Pulsed Electrical Well Stimulation (PEWS), which is a patent-pending technology designed to replace traditional hydraulic fracturing. This innovative approach eliminates the need for water injection and addresses the logistical challenges and environmental risks associated with conventional fracking methods. By utilizing high-voltage electricity and proprietary modeling techniques, Eden enhances rock permeability with precision, facilitating effective resource extraction across various geological settings. This technology not only reduces costs but also minimizes the negative impacts typically associated with hydraulic fracturing, positioning Eden as a leader in environmentally responsible resource recovery.

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.

Ocean Rainforest, Inc. is a company based in Santa Barbara, California, that specializes in cultivating seaweed in open ocean installations. Established in 2007, the company has developed a structural system for the cultivation of macroalgae in pristine ocean waters. Ocean Rainforest offers a range of premium, fully traceable seaweed products aimed at food and cosmetic producers. These products are recognized for their health benefits, containing beneficial proteins, antioxidants, essential minerals, dietary fibers, and polyunsaturated fatty acids. The company also manages onshore processes to ensure that the seaweed is stored in a stable condition, thereby maintaining its quality and nutritional value.

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.

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.

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.

Crosswalk Labs specializes in providing detailed CO2 emissions data that is atmospherically calibrated, spatially granular, and temporally precise. The company focuses on investigating the factors contributing to climate change by tracking greenhouse gas emissions over time with exceptional resolution. By analyzing a vast array of data sources and utilizing advanced optimization techniques on billions of data points, Crosswalk Labs equips its clients with the insights necessary to effectively reduce their carbon footprints.

Propagate is a regenerative agriculture company that facilitates the implementation of agroforestry systems for farmland owners, enabling them to enhance profitability while promoting environmental sustainability. By integrating permanent crops, such as fruit, nut, and timber trees with traditional farming practices, Propagate helps farms improve water quality, biodiversity, soil health, and carbon outcomes. The company offers a comprehensive solution that includes farm planning software, technical assistance, project development services, and financing options, thereby reducing risks associated with adopting agroforestry. Founded in 2017, Propagate's software product, Overyield, currently supports over 55,000 acres of agroforestry and has facilitated the planning of more than 3 million trees and shrubs. Additionally, Propagate actively manages over 2,400 commercial acres through regional agroforestry hubs in New York and Kentucky, having planted over 200,000 trees in the past five years. The company collaborates with various partners and investors, including USDA programs, to further its mission of sustainable agricultural practices.

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, established in 2022 and based in Seattle, Washington, specializes in innovative marine carbon dioxide removal. The company employs a unique photocatalytic method to harness the surface ocean as a collector for atmospheric carbon dioxide, subsequently removing and concentrating it through energy-efficient photochemical reactions. This process aims to support industries with high carbon emissions, such as power generation, in achieving their climate objectives.

Carbon Counts focuses on developing innovative gaming software aimed at encouraging individuals to engage in climate action. Its flagship project, EverForest, is a Play-to-Plant game that motivates players to take both personal and collective steps to combat climate change. In this mobile game, users can plant, grow, and protect trees virtually while simultaneously contributing to real-world reforestation efforts. As players nurture their in-game forests, Carbon Counts undertakes the responsibility of planting and safeguarding trees in actual ecosystems. The company collaborates with forward-thinking organizations to help restore and regenerate thriving environments, combining entertainment with environmental stewardship to foster a more sustainable future.

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, established in 2022 and based in Seattle, Washington, specializes in innovative marine carbon dioxide removal. The company employs a unique photocatalytic method to harness the surface ocean as a collector for atmospheric carbon dioxide, subsequently removing and concentrating it through energy-efficient photochemical reactions. This process aims to support industries with high carbon emissions, such as power generation, in achieving their climate objectives.

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 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 markedly lower carbon footprint. By directly injecting carbon dioxide emissions from industrial sources into proprietary low-carbon concrete formulations, CarbonBuilt enables base industries to effectively reduce greenhouse gas emissions while producing materials that conform to industry standards.

FluroSat, established in 2016 and headquartered in Eveleigh, Australia, specializes in developing predictive crop health monitoring software. The company's primary product, FluroSat, is a decision support platform designed for cotton and grain growers. It employs multispectral and hyperspectral cameras on drones and satellites to diagnose crop health and identify specific stressors limiting crop performance. Additionally, FluroSat offers ProductionWise, a decision support system for commodity crops, aiming to enhance farm efficiency, sustainability, and profitability. This platform provides detailed paddock management, APSIM-powered yield predictions, satellite NDVI monitoring, and localized weather forecasts. FluroSat caters to the agronomist and farmer community.

Vibrant Planet specializes in land management services and technology solutions aimed at accelerating land restoration efforts. Founded in 2004 and based in Incline Village, Nevada, the company collaborates with scientists, land management leaders, and policymakers to develop a cloud-based system that supports collaborative planning. This system is designed to enhance the resilience of communities and ecosystems in the face of climate change. By providing tools for planning and monitoring, Vibrant Planet enables stakeholders to effectively manage land resources, restore natural systems, and promote biodiversity, while also addressing critical issues such as carbon storage and clean water delivery. The company's efforts contribute to creating a more just and vibrant future, ultimately helping to save lives and protect infrastructure.

Infinium is an electrofuels provider that specializes in creating synthetic fuels from renewable energy and waste carbon dioxide. The company focuses on manufacturing ultra-low carbon electrofuels, which serve as drop-in replacements for traditional petroleum-derived products, allowing clients to significantly reduce harmful greenhouse gas emissions in the transportation sector. Infinium's solutions not only contribute to decarbonizing transportation but also provide lower carbon alternatives for various chemical processes, including plastics production. By utilizing existing transportation systems, Infinium enables immediate impacts on carbon reduction targets without the need for capital- and time-intensive upgrades.

Carbon Counts focuses on developing innovative gaming software aimed at encouraging individuals to engage in climate action. Its flagship project, EverForest, is a Play-to-Plant game that motivates players to take both personal and collective steps to combat climate change. In this mobile game, users can plant, grow, and protect trees virtually while simultaneously contributing to real-world reforestation efforts. As players nurture their in-game forests, Carbon Counts undertakes the responsibility of planting and safeguarding trees in actual ecosystems. The company collaborates with forward-thinking organizations to help restore and regenerate thriving environments, combining entertainment with environmental stewardship to foster 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.

AgriProve is an agri-tech company focused on soil management, aiming to enhance agricultural productivity and generate carbon credits. The company offers a next-generation soil measurement platform designed to unlock the carbon potential in soil. By promoting a farmer-led, commercial model of soil carbon farming, AgriProve seeks to regenerate agriculture and sequester carbon on a large scale. Their efforts also focus on improving water retention, nutrient availability, and soil biology, enabling farmers to earn income from carbon abatement activities while ensuring viable returns. AgriProve is committed to advancing agricultural innovation for the benefit of people, nature, and the climate.