Prelude Ventures

LuxWall is a building materials company that designs and manufactures vacuum-insulated glass, a transparent insulation material that reduces heating and cooling losses and improves building energy efficiency. Its vacuum-insulated glass supports energy standards for commercial and residential buildings and uses technology aimed at enabling greater thermal performance. Founded in 2020 and headquartered in Ypsilanti, Michigan, LuxWall seeks to advance sustainable construction and has indicated a potential to reduce global carbon emissions by more than 0.5 gigatonnes per year, highlighting its environmental impact.

RedoxBlox develops thermochemical energy storage technology to decarbonize high-temperature industrial thermal processing and provide long-duration energy storage for the grid. The technology enables continuous high-temperature heat while integrating with existing infrastructure to replace natural gas combustion, supporting electrification and renewables deployment. It reduces carbon dioxide and nitrogen oxides emissions, enhances safety and resilience, and aims to lower total capital cost for industrial processors and power plant operators. By delivering scalable, long-duration heat, RedoxBlox helps industries leverage renewable energy and move toward low-emission operations.

Form Energy, Inc. is a company focused on developing long-duration energy storage systems aimed at transforming the electric grid by enabling the reliable use of renewable energy sources such as wind and solar. Established in 2017 and based in Somerville, Massachusetts, Form Energy is known for its innovative iron-air battery technology, which allows for the storage of electricity over extended periods, making renewable energy more dispatchable throughout the year. This technology not only helps to replace conventional fossil fuel-based generation but also enhances transmission capacity without the need for new infrastructure. By facilitating deep decarbonization of the electric system, Form Energy plays a significant role in reducing carbon emissions and promoting a sustainable energy future.

Vaulted Deep specializes in innovative waste management solutions. It employs patented geologic slurry injection technology to permanently sequester organic wastes underground, achieving significant carbon dioxide removal while promoting local environmental health.

Branch Energy specializes in renewable energy provision, supporting local wind and solar projects. It leverages data analytics and smart home technology to help customers reduce power consumption and promote clean energy initiatives.

Graphyte offers carbon removal services by utilizing a carbon casting technology.

LevelTen Energy is a Seattle-based company that operates a renewable energy transaction marketplace platform. Founded in 2016, it facilitates connections between corporate and industrial power buyers and utility-scale wind, solar, and storage projects. The platform enables these buyers to access power purchase agreements (PPAs), providing financial security through fixed-price renewables and the economic advantages of large-scale projects. LevelTen Energy equips renewable energy buyers, advisors, and sellers with tools and services to expedite better deals.

Xcimer Energy is an innovative company focused on developing laser-driven fusion technology to deliver affordable, abundant, and carbon-free energy. Founded in 2021 and based in Redwood City, California, Xcimer integrates low-cost excimer laser technology with the HYLIFE reaction chamber concept to create a scalable Inertial Fusion Energy (IFE) system. This approach addresses significant challenges that have historically hindered the viability of fusion power, enabling the application of experimentally proven controlled fusion reactions for electrical power generation. By transforming the energy marketplace, Xcimer aims to provide a sustainable energy solution that can meet growing global demands.

Windfall Bio is an innovative company based in San Mateo, California, that addresses climate change by transforming harmful methane emissions into organic fertilizer. Established in 2022, the company utilizes methane-eating microbes to capture methane from various sources, including agriculture, oil and gas, and waste management. This nature-based technology not only reduces the methane footprint of these industries but also improves their operational efficiency and profitability while minimizing the negative environmental impacts associated with synthetic fertilizers. By providing farmers and other producers with the means to convert methane into valuable soil nutrients, Windfall Bio fosters a sustainable agricultural future and contributes positively to environmental conservation. The company is backed by prominent venture capital firms, reflecting its potential to make a significant impact in the fight against climate change.

Thea Energy is developing scalable fusion energy technology using arrays of mass-manufacturable magnets and dynamic software controls. Its proprietary stellarator architecture aims to generate a limitless source of zero-emission power, contributing to a sustainable future.

Founded in 2018, Quaise is an innovative energy company based in Cambridge, Massachusetts. It specializes in developing and commercializing advanced millimeter-wave drilling systems to access geothermal energy sources worldwide, overcoming geographical limitations.

Element Energy develops advanced battery management systems that enhance safety, energy throughput, and lifespan of lithium-ion battery packs. Their technology enables cost-effective repurposing of retired electric vehicle batteries into grid-scale energy storage systems, facilitating renewable energy integration.

Electric Hydrogen is a company focused on deep decarbonization by developing low-cost, high-efficiency systems for producing fossil-free hydrogen. The company targets industrial sectors such as ammonia and steel production, which contribute significantly to global greenhouse gas emissions. By rethinking electrolysis technology from scratch, Electric Hydrogen aims to make clean hydrogen competitive with traditional methods in terms of cost and scale. Their advanced PEM (Proton Exchange Membrane) technology uses renewable electricity to generate clean hydrogen gas, reducing industrial pollution and dependence on fossil fuels. The company's leadership team brings extensive experience from pioneering clean energy companies like Tesla and First Solar, positioning Electric Hydrogen as a strong contender in the quest for zero-emission industrial processes.

Terabase Energy is a provider of automation and digital deployment solutions for utility-scale solar projects. The company develops software and services, including a cloud-based artificial intelligence project development platform that supports collaborative digital models, and offers technical advisory and engineering services. It markets an automation platform that integrates software, automation, and advanced construction techniques to help solar developers and EPC firms optimize project planning, streamline deployment, improve site efficiency, and manage costs, enabling scalable solar installations. The solutions are used by more than 400 engineering, procurement, and construction firms, developers, and independent power producers in 28 countries. Terabase Energy is based in Berkeley, California, with an additional office in Melbourne, Australia.

Rumin8 is addressing a critical environmental challenge by targeting methane emissions from livestock, which account for approximately 3.7% of global greenhouse gas emissions. The company has developed a groundbreaking technology that significantly reduces methane emissions from cattle by up to 95% by harnessing and transforming natural anti-methane compounds found in plants into dietary supplements for livestock. This innovation not only curtails methane production but also enhances the efficiency of the animals’ digestive systems, thereby providing them with more energy for growth. Rumin8's mission is to decarbonize millions of cattle worldwide, contributing to a more sustainable and climate-favorable food system to meet the dietary needs of a growing global population.

LuxWall is a building materials company that designs and manufactures vacuum-insulated glass, a transparent insulation material that reduces heating and cooling losses and improves building energy efficiency. Its vacuum-insulated glass supports energy standards for commercial and residential buildings and uses technology aimed at enabling greater thermal performance. Founded in 2020 and headquartered in Ypsilanti, Michigan, LuxWall seeks to advance sustainable construction and has indicated a potential to reduce global carbon emissions by more than 0.5 gigatonnes per year, highlighting its environmental impact.

Element Energy develops advanced battery management systems that enhance safety, energy throughput, and lifespan of lithium-ion battery packs. Their technology enables cost-effective repurposing of retired electric vehicle batteries into grid-scale energy storage systems, facilitating renewable energy integration.

Form Energy, Inc. is a company focused on developing long-duration energy storage systems aimed at transforming the electric grid by enabling the reliable use of renewable energy sources such as wind and solar. Established in 2017 and based in Somerville, Massachusetts, Form Energy is known for its innovative iron-air battery technology, which allows for the storage of electricity over extended periods, making renewable energy more dispatchable throughout the year. This technology not only helps to replace conventional fossil fuel-based generation but also enhances transmission capacity without the need for new infrastructure. By facilitating deep decarbonization of the electric system, Form Energy plays a significant role in reducing carbon emissions and promoting a sustainable energy future.

Founded in 2017, Fervo Energy specializes in developing and operating geothermal assets using proprietary technology. Based in San Francisco, the company generates clean power through innovative geoscience methods, aiming to provide a dispatchable foundation for a 100% clean energy future.

Terabase Energy is a provider of automation and digital deployment solutions for utility-scale solar projects. The company develops software and services, including a cloud-based artificial intelligence project development platform that supports collaborative digital models, and offers technical advisory and engineering services. It markets an automation platform that integrates software, automation, and advanced construction techniques to help solar developers and EPC firms optimize project planning, streamline deployment, improve site efficiency, and manage costs, enabling scalable solar installations. The solutions are used by more than 400 engineering, procurement, and construction firms, developers, and independent power producers in 28 countries. Terabase Energy is based in Berkeley, California, with an additional office in Melbourne, Australia.

Rumin8 is addressing a critical environmental challenge by targeting methane emissions from livestock, which account for approximately 3.7% of global greenhouse gas emissions. The company has developed a groundbreaking technology that significantly reduces methane emissions from cattle by up to 95% by harnessing and transforming natural anti-methane compounds found in plants into dietary supplements for livestock. This innovation not only curtails methane production but also enhances the efficiency of the animals’ digestive systems, thereby providing them with more energy for growth. Rumin8's mission is to decarbonize millions of cattle worldwide, contributing to a more sustainable and climate-favorable food system to meet the dietary needs of a growing global population.

Electric Hydrogen is a company focused on deep decarbonization by developing low-cost, high-efficiency systems for producing fossil-free hydrogen. The company targets industrial sectors such as ammonia and steel production, which contribute significantly to global greenhouse gas emissions. By rethinking electrolysis technology from scratch, Electric Hydrogen aims to make clean hydrogen competitive with traditional methods in terms of cost and scale. Their advanced PEM (Proton Exchange Membrane) technology uses renewable electricity to generate clean hydrogen gas, reducing industrial pollution and dependence on fossil fuels. The company's leadership team brings extensive experience from pioneering clean energy companies like Tesla and First Solar, positioning Electric Hydrogen as a strong contender in the quest for zero-emission industrial processes.

Founded in 2018, Quaise is an innovative energy company based in Cambridge, Massachusetts. It specializes in developing and commercializing advanced millimeter-wave drilling systems to access geothermal energy sources worldwide, overcoming geographical limitations.

Living Carbon is a public benefit corporation based in San Francisco, California, founded in 2019 by Maddie Hall and Patrick Mellor. The company leverages advanced biotechnology to enhance the natural ability of plants, particularly trees, to capture and store carbon dioxide (CO2). By improving photosynthesis, inhibiting photorespiration, increasing growth rates, and shortening tree growing cycles, Living Carbon aims to create more durable wood for building and manufacturing applications while addressing climate change. The company's ultimate goal is to restore balance to the planet's metabolic processes through innovative forest biotechnology solutions.

Founded in 2018, Quaise is an innovative energy company based in Cambridge, Massachusetts. It specializes in developing and commercializing advanced millimeter-wave drilling systems to access geothermal energy sources worldwide, overcoming geographical limitations.

Verdox is dedicated to reversing climate change through the development and deployment of advanced technology. The company’s proprietary electro-swing process, developed at MIT, enables carbon dioxide and other acid gases to be captured with up to 80% less energy and 70% less cost than conventional approaches.

LuxWall is a building materials company that designs and manufactures vacuum-insulated glass, a transparent insulation material that reduces heating and cooling losses and improves building energy efficiency. Its vacuum-insulated glass supports energy standards for commercial and residential buildings and uses technology aimed at enabling greater thermal performance. Founded in 2020 and headquartered in Ypsilanti, Michigan, LuxWall seeks to advance sustainable construction and has indicated a potential to reduce global carbon emissions by more than 0.5 gigatonnes per year, highlighting its environmental impact.

LevelTen Energy is a Seattle-based company that operates a renewable energy transaction marketplace platform. Founded in 2016, it facilitates connections between corporate and industrial power buyers and utility-scale wind, solar, and storage projects. The platform enables these buyers to access power purchase agreements (PPAs), providing financial security through fixed-price renewables and the economic advantages of large-scale projects. LevelTen Energy equips renewable energy buyers, advisors, and sellers with tools and services to expedite better deals.

Form Energy, Inc. is a company focused on developing long-duration energy storage systems aimed at transforming the electric grid by enabling the reliable use of renewable energy sources such as wind and solar. Established in 2017 and based in Somerville, Massachusetts, Form Energy is known for its innovative iron-air battery technology, which allows for the storage of electricity over extended periods, making renewable energy more dispatchable throughout the year. This technology not only helps to replace conventional fossil fuel-based generation but also enhances transmission capacity without the need for new infrastructure. By facilitating deep decarbonization of the electric system, Form Energy plays a significant role in reducing carbon emissions and promoting a sustainable energy future.

Electric Hydrogen is a company focused on deep decarbonization by developing low-cost, high-efficiency systems for producing fossil-free hydrogen. The company targets industrial sectors such as ammonia and steel production, which contribute significantly to global greenhouse gas emissions. By rethinking electrolysis technology from scratch, Electric Hydrogen aims to make clean hydrogen competitive with traditional methods in terms of cost and scale. Their advanced PEM (Proton Exchange Membrane) technology uses renewable electricity to generate clean hydrogen gas, reducing industrial pollution and dependence on fossil fuels. The company's leadership team brings extensive experience from pioneering clean energy companies like Tesla and First Solar, positioning Electric Hydrogen as a strong contender in the quest for zero-emission industrial processes.

Heirloom is a carbon capture company developing direct air capture technology that accelerates the natural absorption of carbon dioxide. Its approach uses a limestone-based process to increase CO2 uptake and stores the captured carbon permanently underground, powered by renewable energy. The company also applies carbon capture and utilization techniques to enhance natural CO2 removal. By offering a scalable, renewable-energy driven solution, Heirloom aims to help businesses meet sustainability goals with a cost-effective path to significant carbon removal.

Solidia Technologies is an advanced materials company that develops low‑energy processes for building and construction products. Its proprietary technology captures and stores CO₂ in concrete, turning the gas into a useful component of the material. The company’s solutions enable the production of cement, concrete, and stone alternatives that deliver higher performance while reducing energy use and waste. By integrating artificial intelligence into the manufacturing workflow, Solidia improves quality control, cuts material waste, and lowers carbon emissions, supporting a more sustainable construction industry. Founded in 2008 and headquartered in Piscataway, New Jersey, the firm serves the concrete and cement sectors worldwide.

Form Energy, Inc. is a company focused on developing long-duration energy storage systems aimed at transforming the electric grid by enabling the reliable use of renewable energy sources such as wind and solar. Established in 2017 and based in Somerville, Massachusetts, Form Energy is known for its innovative iron-air battery technology, which allows for the storage of electricity over extended periods, making renewable energy more dispatchable throughout the year. This technology not only helps to replace conventional fossil fuel-based generation but also enhances transmission capacity without the need for new infrastructure. By facilitating deep decarbonization of the electric system, Form Energy plays a significant role in reducing carbon emissions and promoting a sustainable energy future.

Natron Energy develops sodium ion battery technologies for various industrial applications. Founded in 2012, the company specializes in stationary energy storage solutions, including UPS systems, electric vehicle charging, and grid support.

CoverCress Inc. specializes in developing and commercializing field pennycress as a sustainable oilseed crop for industrial oils and livestock feed. Founded in 2013, the company is headquartered in Saint Louis, Missouri.

Form Energy, Inc. is a company focused on developing long-duration energy storage systems aimed at transforming the electric grid by enabling the reliable use of renewable energy sources such as wind and solar. Established in 2017 and based in Somerville, Massachusetts, Form Energy is known for its innovative iron-air battery technology, which allows for the storage of electricity over extended periods, making renewable energy more dispatchable throughout the year. This technology not only helps to replace conventional fossil fuel-based generation but also enhances transmission capacity without the need for new infrastructure. By facilitating deep decarbonization of the electric system, Form Energy plays a significant role in reducing carbon emissions and promoting a sustainable energy future.

Powerhive Inc. is a company focused on facilitating rural electrification projects in energy access markets globally. Established in 2011 and headquartered in Berkeley, California, with an additional office in Nairobi, Kenya, Powerhive offers a suite of technology platforms designed to enhance the efficiency and effectiveness of microgrid operations. Its flagship product, Honeycomb, is a cloud-based software platform that automates account management, monitors microgrid operations remotely, and performs real-time data analytics. Other key offerings include Asali, a smart meter for off-grid applications, and SWARM, a tool for site selection and customer identification. Powerhive also provides extensive services in project development and management, covering aspects such as market feasibility studies, site selection, pilot deployments, design, customer acquisition, and on-site training. The company is committed to delivering affordable and reliable electricity to off-grid communities, enabling users to power small appliances and support income-generating activities.

LevelTen Energy is a Seattle-based company that operates a renewable energy transaction marketplace platform. Founded in 2016, it facilitates connections between corporate and industrial power buyers and utility-scale wind, solar, and storage projects. The platform enables these buyers to access power purchase agreements (PPAs), providing financial security through fixed-price renewables and the economic advantages of large-scale projects. LevelTen Energy equips renewable energy buyers, advisors, and sellers with tools and services to expedite better deals.

GreenLight Biosciences is a biotechnology company specializing in RNA-based solutions for agriculture and pharmaceutical applications. It develops mRNA vaccines, including COVID-19 candidates, and offers sustainable crop protection technologies using its proprietary cell-free production platform.

CoverCress Inc. specializes in developing and commercializing field pennycress as a sustainable oilseed crop for industrial oils and livestock feed. Founded in 2013, the company is headquartered in Saint Louis, Missouri.

Solidia Technologies is an advanced materials company that develops low‑energy processes for building and construction products. Its proprietary technology captures and stores CO₂ in concrete, turning the gas into a useful component of the material. The company’s solutions enable the production of cement, concrete, and stone alternatives that deliver higher performance while reducing energy use and waste. By integrating artificial intelligence into the manufacturing workflow, Solidia improves quality control, cuts material waste, and lowers carbon emissions, supporting a more sustainable construction industry. Founded in 2008 and headquartered in Piscataway, New Jersey, the firm serves the concrete and cement sectors worldwide.

LevelTen Energy is a Seattle-based company that operates a renewable energy transaction marketplace platform. Founded in 2016, it facilitates connections between corporate and industrial power buyers and utility-scale wind, solar, and storage projects. The platform enables these buyers to access power purchase agreements (PPAs), providing financial security through fixed-price renewables and the economic advantages of large-scale projects. LevelTen Energy equips renewable energy buyers, advisors, and sellers with tools and services to expedite better deals.

Heliotrope Technologies designs and manufactures electrochromic window coatings that can independently control light and heat transmission. Its coating technology uses a thin film of transparent nanocrystals embedded in a matrix, which, with a small electrical stimulus, adjusts a window's transmission of visible light and near-infrared radiation to reduce heat. The core technology was developed at Lawrence Berkeley National Laboratory and is associated with researchers Delia Milliron and Guillermo Garcia. Founded in 2012, Heliotrope Technologies is based in California, and its products target energy-saving smart windows that enable tint control to improve occupant comfort and reduce building energy use.

CoverCress Inc. specializes in developing and commercializing field pennycress as a sustainable oilseed crop for industrial oils and livestock feed. Founded in 2013, the company is headquartered in Saint Louis, Missouri.

Spark Thermionics is a developer of innovative energy-generation devices aimed at transforming conventional power production methods. The company's technology leverages heat-to-electricity converters based on thermionic energy conversion, allowing for efficient power generation from various fuel sources. This capability ensures that their devices operate quietly and can be scaled to produce electricity ranging from watts to megawatts. By focusing on efficiency and versatility, Spark Thermionics aims to provide cleaner, more affordable, and secure electricity solutions for users worldwide.

Founded in 2008, Renew Financial specializes in financing solutions for contractors and homeowners to promote energy efficiency and renewable energy projects. Its key products include Property-Assessed Clean Energy (PACE) financing and the Warehouse for Energy Efficiency Loans, facilitating investments from institutional investors.

Powerhive Inc. is a company focused on facilitating rural electrification projects in energy access markets globally. Established in 2011 and headquartered in Berkeley, California, with an additional office in Nairobi, Kenya, Powerhive offers a suite of technology platforms designed to enhance the efficiency and effectiveness of microgrid operations. Its flagship product, Honeycomb, is a cloud-based software platform that automates account management, monitors microgrid operations remotely, and performs real-time data analytics. Other key offerings include Asali, a smart meter for off-grid applications, and SWARM, a tool for site selection and customer identification. Powerhive also provides extensive services in project development and management, covering aspects such as market feasibility studies, site selection, pilot deployments, design, customer acquisition, and on-site training. The company is committed to delivering affordable and reliable electricity to off-grid communities, enabling users to power small appliances and support income-generating activities.

Heliotrope Technologies designs and manufactures electrochromic window coatings that can independently control light and heat transmission. Its coating technology uses a thin film of transparent nanocrystals embedded in a matrix, which, with a small electrical stimulus, adjusts a window's transmission of visible light and near-infrared radiation to reduce heat. The core technology was developed at Lawrence Berkeley National Laboratory and is associated with researchers Delia Milliron and Guillermo Garcia. Founded in 2012, Heliotrope Technologies is based in California, and its products target energy-saving smart windows that enable tint control to improve occupant comfort and reduce building energy use.

CoverCress Inc. specializes in developing and commercializing field pennycress as a sustainable oilseed crop for industrial oils and livestock feed. Founded in 2013, the company is headquartered in Saint Louis, Missouri.

QuantumScape is a renewable energy company focused on advancing solid-state battery technology to enhance the performance and range of electric vehicles. Founded in 2010 by Jagdeep Singh in San Jose, California, the company aims to transform the battery industry by creating a solid-state battery that offers significantly higher energy storage capacity compared to traditional batteries. QuantumScape is developing next-generation solid-state lithium-metal batteries, featuring an innovative anode-less cell design that improves energy density while reducing material costs and streamlining manufacturing processes. Through these advancements, QuantumScape seeks to facilitate the widespread adoption of electric vehicles.

Aquion Energy specializes in developing and commercializing innovative energy storage solutions, particularly its proprietary Aqueous Hybrid Ion (AHI™) batteries. These sodium ion batteries are designed for stationary energy storage and are notable for their environmentally friendly design, utilizing non-toxic components such as saltwater. Aquion's technology addresses the limitations of traditional energy storage systems, providing safe, reliable, and sustainable options that are non-flammable and non-explosive. By enhancing the electrical grid, Aquion's AHI systems optimize existing generation assets and facilitate the broader adoption of renewable energy technologies, thereby contributing to the reduction of reliance on fossil fuels.

Founded in 2008, Renew Financial specializes in financing solutions for contractors and homeowners to promote energy efficiency and renewable energy projects. Its key products include Property-Assessed Clean Energy (PACE) financing and the Warehouse for Energy Efficiency Loans, facilitating investments from institutional investors.

Heliotrope Technologies designs and manufactures electrochromic window coatings that can independently control light and heat transmission. Its coating technology uses a thin film of transparent nanocrystals embedded in a matrix, which, with a small electrical stimulus, adjusts a window's transmission of visible light and near-infrared radiation to reduce heat. The core technology was developed at Lawrence Berkeley National Laboratory and is associated with researchers Delia Milliron and Guillermo Garcia. Founded in 2012, Heliotrope Technologies is based in California, and its products target energy-saving smart windows that enable tint control to improve occupant comfort and reduce building energy use.