The Grantham Foundation

Vema Hydrogen is a trailblazing company specializing in clean hydrogen production. It tackles the global challenge of decarbonization by generating hydrogen through geologic stimulation, offering a clean and cost-effective alternative to traditional methods. The company employs advanced numerical simulations, geochemical analysis, and multiphase flow studies to optimize hydrogen production. It also identifies and tests suitable geological locations for pilot projects, obtains necessary permits, and optimizes catalyst use to enhance efficiency.

Carbon Ridge is a company focused on decarbonizing the maritime shipping industry through its innovative technology. It operates a modular onboard carbon capture and storage system that offers a fuel-independent solution to significantly reduce carbon dioxide and other greenhouse gas emissions from commercial vessels. By providing a low-cost and near-term method for end-to-end decarbonization, Carbon Ridge enables shipping companies to adopt a fuel-agnostic approach, thereby facilitating their transition to more sustainable practices.

Paebbl, established in 2021 by Pol Knops, Jane Walerud, Marta Sjögren, and Andreas Saari, is a pioneering company focused on carbon storage and utilization. It specializes in capturing carbon dioxide from industrial facilities or directly from the atmosphere, transforming it into carbon-negative building materials such as paper and construction products. This process, known as carbon dioxide mineralization, accelerates naturally occurring processes by over a million times with minimal energy input. Paebbl's mission is to reduce global carbon emissions by providing sustainable, carbon-negative raw materials for the construction industry, which contributes significantly to overall greenhouse gas emissions.

Hephae Energy Technology is an energy company specializing in advanced drilling technology aimed at enhancing geothermal energy generation. The company provides an integrated drilling system designed to facilitate the safe, efficient, and scalable development of geothermal resources worldwide. By harnessing abundant geothermal heat, Hephae aims to reduce costs associated with drilling wells, making geothermal energy a more economically viable alternative within the energy sector. Their innovative approach enables the energy industry to access reliable technology for accurately and productively drilling geothermal wells, thereby contributing to the global shift toward sustainable energy solutions.

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

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, founded in 2016 by Amy Gong in College Park, Maryland, is dedicated to advancing cellulose-based technologies. The company specializes in producing high-performance, cost-effective wood-based materials that enhance thermal energy efficiency and promote environmental sustainability. InventWood's innovative products are designed to be lightweight, safe for installation, and resistant to shattering. By focusing on the development of cellulosic materials, InventWood aims to contribute to a more sustainable future through carbon-negative construction practices, ultimately providing natural goods that benefit both current and future generations.

Applied Carbon is a company focused on developing innovative mobile pyrolysis systems that produce biochar and sequester carbon on a large scale. Their technology targets degraded or blighted lands in urban and peri-urban areas, efficiently converting on-site biomass waste into biochar, a sustainable form of charcoal derived from agricultural waste. This process not only facilitates organic waste disposal but also enhances soil health by improving nutrient and water retention and aiding in the remediation of contaminants. By trapping atmospheric carbon, Applied Carbon aims to contribute to environmental sustainability and soil regeneration while addressing the challenges posed by climate change.

Yama is a developer of direct air capture technology focused on enhancing scalability while minimizing energy consumption. The company employs a novel hybrid electrochemical process that significantly improves energy efficiency compared to traditional methods. By addressing existing limitations in electricity, land use, water, and manufacturing, Yama aims to offer clients an ultra-scalable and cost-effective solution for carbon capture. This innovative approach positions Yama as a key player in the pursuit of sustainable environmental practices.

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. Utilizing a proprietary electrochemical process, Travertine converts carbon dioxide from the atmosphere into mineral forms while simultaneously producing sulfuric acid, which is essential for critical element extraction and fertilizer production. The company effectively recycles sulfate wastes to generate sulfuric acid, thereby minimizing chemical waste during these processes. Additionally, Travertine generates high-quality carbon credits through its direct air capture and mineralization efforts, contributing to a sustainable approach in mining and fertilizer industries.

Ucaneo is an environmental services company focused on developing innovative carbon removal technology aimed at capturing carbon dioxide from the atmosphere. The company's approach utilizes a water-based bioreactor equipped with an enzymatically enhanced biomembrane. This technology enables clients to effectively reduce their carbon footprint and contribute to climate change mitigation efforts. Ucaneo's solutions are designed to address the urgent need for sustainable methods to combat rising carbon levels and promote environmental health.

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 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.

Atlas is a process to create carbon negative materials for industry use.

Cache Energy is a company focused on developing innovative energy storage technology aimed at providing a cleaner alternative to fossil fuels. The company specializes in transformational ultra-long duration energy storage systems that utilize a thermo-chemical process. This technology is designed to be non-toxic, non-flammable, and fire-retardant, ensuring safe and easy transportation. Cache Energy's solutions enable industries to store energy for extended periods, with minimal energy loss, making it suitable for a variety of industrial applications where reliable power is needed.

Avalanche Energy is a startup focused on developing compact fusion reactors for diverse applications such as distributed energy, mobility, space propulsion, and power generation. Its innovative platform enables self-sustaining fusion chain reactions, offering high energy density with safety and minimal radioactive waste. The company's modular reactor design allows for stacking to meet varying power demands, contributing to a cleaner, decarbonized planet while facilitating rapid development through iterative testing cycles.

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.

Type One Energy Group is dedicated to developing sustainable and affordable fusion power solutions. Established in 2019 by a team of esteemed fusion scientists and experienced business leaders, the company focuses on creating advanced stellarator fusion energy systems. Utilizing cutting-edge manufacturing techniques, modern computational physics, and high-field superconducting magnets, Type One Energy aims to optimize its reactor design. The company's FusionDirect program seeks to establish a fusion power plant within the next decade, employing a strategy that emphasizes collaboration with partners and efficient use of capital. By pursuing this innovative approach, Type One Energy aspires to deliver reliable and abundant power to meet the growing energy demands globally.

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, focused on revolutionizing lithium extraction to support the global energy transition. Founded in 2018, the company specializes in a patented direct lithium extraction (DLE) technology that aims to provide sustainable and economically viable solutions for lithium producers. By collaborating with mining companies and lithium asset owners in regions such as Chile and Argentina, Summit Nanotech seeks to optimize operations and conserve natural resources while minimizing environmental impact. The company's innovative approach positions it as a leader in developing cost-effective solutions for the growing demand for battery-grade lithium.

Carboniferous is a company focused on developing anoxic biological carbon technology aimed at sequestering carbon from terrestrial biomass. Its innovative approach accelerates natural climate recovery by transferring excess biomass into anoxic zones, where decomposition is minimized, allowing for effective carbon storage. By leveraging existing supply chains, Carboniferous enables businesses to reduce their carbon footprint and enhance their sustainability efforts through the efficient management of biomass resources. The company’s technology represents a significant advancement in the quest to mitigate climate change by addressing the challenges associated with excess biomass and carbon emissions.

Nexqt is a technology company that specializes in AI-powered carbon monitoring. It transforms untapped data streams and carbon cycle science into actionable insights, helping cities track and reduce their emissions in real-time. The platform provides detailed emissions data across different city scales, using advanced geolocation and satellite imagery to pinpoint carbon hotspots. This enables city stakeholders to make informed decisions, prioritize impactful investment opportunities, and implement effective climate action strategies.

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.

Paebbl, established in 2021 by Pol Knops, Jane Walerud, Marta Sjögren, and Andreas Saari, is a pioneering company focused on carbon storage and utilization. It specializes in capturing carbon dioxide from industrial facilities or directly from the atmosphere, transforming it into carbon-negative building materials such as paper and construction products. This process, known as carbon dioxide mineralization, accelerates naturally occurring processes by over a million times with minimal energy input. Paebbl's mission is to reduce global carbon emissions by providing sustainable, carbon-negative raw materials for the construction industry, which contributes significantly to overall greenhouse gas emissions.

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 Ridge is a company focused on decarbonizing the maritime shipping industry through its innovative technology. It operates a modular onboard carbon capture and storage system that offers a fuel-independent solution to significantly reduce carbon dioxide and other greenhouse gas emissions from commercial vessels. By providing a low-cost and near-term method for end-to-end decarbonization, Carbon Ridge enables shipping companies to adopt a fuel-agnostic approach, thereby facilitating their transition to more sustainable practices.

Fervo Energy, established in 2017 and headquartered in San Francisco, specializes in developing and operating geothermal assets using proprietary technology. The company aims to generate clean, dispatchable power from new locations, contributing to a 100% clean energy future. Fervo's innovative approach to geoscience accelerates the development of geothermal projects, providing carbon-free energy solutions for clients seeking scalable, productive power sources.

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 informed by extensive data, which includes subsurface characterization technology and advanced sensing techniques. By integrating artificial intelligence and big data, Zanskar enhances the exploration process and helps clients identify previously unknown geothermal resources, ultimately reducing the risks associated with such endeavors. Through its innovative approach, Zanskar aims to contribute to the advancement of geothermal energy as a sustainable resource.

Electrified Thermal Solutions is a Massachusetts-based company founded in 2021 that focuses on decarbonizing industrial processes by replacing fossil fuels with renewable heat. Originating from research at MIT's Department of Nuclear Science and Engineering, the company has developed innovative energy storage technology that converts intermittent renewable electricity into constant heat. This is achieved through the use of low-cost conductive ceramic blocks, allowing various industrial sectors to utilize zero-carbon heat effectively. By providing a sustainable alternative for furnaces, turbines, boilers, and kilns, Electrified Thermal Solutions aims to drive an energy revolution and significantly reduce carbon emissions in industry.

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. Utilizing a proprietary electrochemical process, Travertine converts carbon dioxide from the atmosphere into mineral forms while simultaneously producing sulfuric acid, which is essential for critical element extraction and fertilizer production. The company effectively recycles sulfate wastes to generate sulfuric acid, thereby minimizing chemical waste during these processes. Additionally, Travertine generates high-quality carbon credits through its direct air capture and mineralization efforts, contributing to a sustainable approach in mining and fertilizer industries.

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 is a company focused on utilizing algae as a sustainable solution for carbon sequestration at a gigaton scale. It employs an innovative process that facilitates the growth of microalgae in open-air pond systems situated on coastal desert land, without the need for fresh water. This method not only contributes to the health of oceans and air but also addresses the increasing demand for protein. By harnessing natural processes, Brilliant Planet offers an effective and affordable way to permanently and quantifiably remove carbon from the atmosphere, positioning itself as a leader in environmental sustainability and climate change mitigation.

Heirloom is a company specializing in direct air capture technology aimed at enhancing the natural process of CO2 absorption from the atmosphere. Its innovative system accelerates limestone's ability to capture carbon dioxide, which is then stored permanently underground. The process operates using renewable energy, making it an environmentally friendly solution for carbon removal. Heirloom's technology is designed to capture and remove atmospheric CO2 at a gigaton scale, significantly reducing second-order impacts and minimizing extraction efforts. This approach allows clients to restore the atmosphere through natural processes, contributing to global efforts against climate change.

Running Tide is a global ocean health company that focuses on deploying nature-based interventions to remove carbon from the atmosphere and combat ocean acidification. The company utilizes adaptive aquaculture techniques to optimize marine environments while producing healthy, low-carbon protein. Running Tide employs advanced monitoring and measurement technology, leveraging photosynthesis, ocean currents, and gravity to store carbon in the deep ocean. By analyzing ocean data, the company aims to enhance the utilization of two-thirds of the Earth’s surface in the fight against climate change, ultimately improving the health of the world's oceans.

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 specializing in carbon capture and sequestration (CCS) technologies. It aims to lower costs and accelerate CCS deployment by employing a vertically integrated, multi-strategy approach. The company combines expertise from engineering, development, and finance to capture and store carbon dioxide more efficiently than competitors, targeting billions of metric tons annually from industrial sources. Its primary goal is to facilitate significant reductions in greenhouse gas emissions and combat global warming.

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.

NovoNutrients is a pioneering biotechnology company specializing in the conversion of waste CO2 emissions into high-value proteins and additives for use in food and animal feed. The company's proprietary technology employs advanced gas fermentation systems and custom microbes to transform industrial waste CO2, hydrogen, and oxygen into safe, natural single-cell protein ingredients. This innovative process not only addresses global food security by providing a sustainable alternative protein source but also contributes to climate change mitigation through carbon capture and utilization.

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.

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. is a Seattle-based company that specializes in the design and manufacture of sheared-flow stabilized Z-Pinch fusion reactors for power generation. Founded in 2017, the company focuses on developing compact and scalable fusion technology that offers low-carbon, cost-effective, and flexible energy solutions. Unlike conventional fusion methods, Zap Energy's approach utilizes electric current to create magnetic fields that confine and compress plasma, enhancing the stability and efficiency of the fusion process. This innovative technology aims to provide sustainable energy while requiring less capital investment compared to traditional fusion systems.

Shyp is a manufacturing company that designs and builds electrolyzer that helps to produce hydrogen and oxygen using seawater.

Solidia Technologies, Inc. is a company that specializes in the development of advanced materials for the building and construction industries. Established in 2008 and headquartered in Piscataway, New Jersey, Solidia focuses on creating sustainable solutions by utilizing innovative processes that capture and store carbon dioxide (CO2) in concrete. This technology not only transforms CO2 into a usable component in production but also enables the design of high-performance products that are produced through low-energy methods and incorporate waste materials. Solidia's approach significantly reduces environmental impact while offering superior performance compared to traditional cement, concrete, and stone products. Additionally, the company integrates artificial intelligence into its concrete production processes, enhancing quality control and system optimization, thereby helping clients minimize waste and lower their carbon emissions.