Mainspring
Series F in 2025
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Resource Chemical
Venture Round in 2025
ReSource Chemical is a company based in Berkeley, California, focused on developing high-performance plastics derived from carbon dioxide. The company utilizes a proprietary bio-based platform to create chemicals that enable the production of environmentally friendly plastics with superior physical properties compared to traditional fossil fuel-based plastics. By converting CO2 into these innovative materials, ReSource Chemical aims to provide sustainable alternatives that do not contribute to environmental pollution.
Spiritus is a climate tech company focused on direct-air-capture (DAC) technology, aiming to provide a scalable and modular solution for carbon removal. The company has developed a system that integrates the Spiritus Sorbent with the Spiritus Carbon Orchard, allowing for efficient sorption and desorption processes at significantly lower costs compared to existing state-of-the-art sorbents. Spiritus is dedicated to making carbon removal a viable and practical option in the global effort to combat climate change, thereby promoting sustainable environmental stewardship.
Sonocharge
Venture Round in 2025
Sonocharge Energy is focused on developing innovative battery technology that enhances the performance of rechargeable, energy-dense, and long-duration batteries. Its platform technology facilitates efficient charging, which is applicable across various markets, including transportation, electric vehicles, e-mobility, electric bikes, scooters, aerospace, electric airplanes, and drones. By improving battery performance and safety, Sonocharge addresses the growing demand for higher power density and energy solutions across multiple industries.
LuxWall is a building materials company that pioneers the design and manufacture of vacuum-insulated glass. LuxWall produces glass that acts as transparent insulation, providing thermal insulation values comparable to fiberglass wall insulation. With widespread adoption, LuxWall's patented technology has the potential to reduce global carbon emissions by more than 0.5 gigatonnes per year. The company was founded in 2020 and is headquartered in Ypsilanti, Michigan, United States.
RedoxBlox
Series A in 2024
RedoxBlox specializes in thermochemical energy storage technology aimed at decarbonizing high-temperature industrial thermal processing and enhancing natural gas power production. The company's innovative system significantly reduces carbon and nitrogen oxide emissions while integrating seamlessly with existing infrastructure to improve grid resilience. By providing a cost-effective alternative to fossil fuels, RedoxBlox enables continuous energy discharge at high temperatures, thereby facilitating the transition to renewable energy sources. The technology is designed to support industrial processors and power plant operators in achieving greater safety, resiliency, and lower capital costs, ultimately allowing industries to effectively leverage large-scale, long-duration energy storage.
Fortera is a company focused on developing innovative solutions for the cement and concrete industry with the aim of significantly reducing carbon dioxide emissions. It has created a process that captures industrial carbon dioxide emissions and mineralizes them to produce a more environmentally friendly form of concrete. This method not only addresses the substantial carbon footprint associated with traditional concrete production but also offers improved performance characteristics. By providing sustainable alternatives to conventional cement products, Fortera contributes to global efforts to mitigate climate change and enhance the environmental sustainability of construction practices.
Planted Solar
Series A in 2024
Planted Solar is a company focused on transforming the solar power industry through innovative design and installation methods. By leveraging advanced development software and construction robots, the company constructs flexible, high-density solar power plants that can be deployed on previously unsuitable land. This approach allows Planted Solar to generate twice as much energy per acre and complete projects three times faster than traditional methods. The company's objective is to facilitate rapid solar development, making clean and abundant energy accessible to businesses and corporations while optimizing their energy management. With a mission to accelerate the transition to renewable energy, Planted Solar aims to significantly enhance the efficiency and effectiveness of solar energy deployment.
Li Industries
Series B in 2024
Li Industries is a start-up focused on advancing lithium-ion battery recycling technologies. The company specializes in the recovery of valuable materials such as lithium, cobalt, and nickel from end-of-life batteries used in electric vehicles, consumer electronics, and other energy storage systems. By utilizing innovative direct recycling technology and a scalable electrochemical flow system, Li Industries aims to extract these essential metals efficiently and sustainably. This process not only reduces environmental waste but also supports the production of new batteries from recycled components. By optimizing the recovery and treatment of these materials, Li Industries contributes to lowering energy consumption and emissions in the battery production process, ultimately fostering a more sustainable supply chain for battery manufacturing.
Pascal is a technological company focused on developing a new class of solid refrigerants designed to replace traditional gaseous refrigerants used in heating, ventilation, and air conditioning (HVAC) systems. These solid refrigerants operate within the same temperature and pressure ranges as their gaseous counterparts but eliminate global warming potential. By doing so, Pascal aims to enhance energy efficiency and reduce system size, thereby advancing the HVAC sector with next-generation heating and cooling solutions.
Koloma is a geologic hydrogen company specializing in identifying and commercially developing geologic hydrogen resources. It leverages proprietary technology, data, and expertise to create innovative solutions for reducing global carbon emissions, thereby assisting businesses in lowering their carbon footprint and combating climate change.
Spiritus is a climate tech company focused on direct-air-capture (DAC) technology, aiming to provide a scalable and modular solution for carbon removal. The company has developed a system that integrates the Spiritus Sorbent with the Spiritus Carbon Orchard, allowing for efficient sorption and desorption processes at significantly lower costs compared to existing state-of-the-art sorbents. Spiritus is dedicated to making carbon removal a viable and practical option in the global effort to combat climate change, thereby promoting sustainable environmental stewardship.
Caelux is a renewable energy company based in Pasadena, California, founded in 2014. It specializes in developing and manufacturing perovskite-on-glass technology for the terrestrial solar and commercial space industries. This innovative technology is designed to enhance solar device efficiency while minimizing the amount of semiconducting material required, thereby reducing production costs. Caelux's products improve power production and integrate seamlessly into existing photovoltaic module manufacturing processes, allowing users to lower installed costs and boost overall performance.
TeraWatt Technology
Series C in 2023
TeraWatt Technology Inc., founded in 2017 and headquartered in Santa Clara, California, with a subsidiary in Tokyo, Japan, specializes in the design and development of lithium-ion rechargeable batteries for various electrified applications. The company focuses on manufacturing batteries that combine energy and power density with safety, catering to industrial clients in need of long-lasting and reliable power solutions. TeraWatt Technology employs competitive engineering practices and production processes to ensure high-quality battery performance, positioning itself as a key player in the rechargeable battery market.
Ceibo is an industrial biotechnology company that specializes in developing innovative technologies for the mining industry. The company has created a proprietary method for leaching copper sulphide and is actively working on solutions to suppress dust generated during mining operations. Ceibo's technology is aimed at enhancing the production of critical minerals essential for the clean energy transition and is designed to optimize the recovery processes from both primary and secondary sulfide ores rich in chalcopyrite. The company is focused on scaling its technology to improve not only copper recovery but also to extend its benefits to other vital minerals. By providing these advanced solutions, Ceibo enables mining clients to enhance operational efficiency, reduce costs, and maintain environmentally sustainable practices with minimal waste.
Realta Fusion
Seed Round in 2023
Realta Fusion is an energy company focused on developing fusion energy technology to generate industrial heat and power. The company leverages advancements in super-conducting materials, plasma physics, and computing power to create a straightforward linear fusion reactor design. By utilizing abundant fuel sources, Realta Fusion aims to deliver a zero-carbon solution for energy production, offering clients a lower capital expenditure power plant option.
LanzaTech, Inc. is a carbon recycling company based in Skokie, Illinois, with additional offices in Roselle, Illinois; Shanghai, China; and Gurgaon, India. Founded in 2005, the company specializes in producing fuel ethanol from renewable non-food resources, including industrial flue gases and waste gases generated from municipal solid waste and biomass gasification. LanzaTech’s innovative technology converts carbon emissions into valuable products, effectively retrofitting industrial emission sources, such as steel mills, to create sustainable fuels, fabrics, and packaging. By recycling carbon from various sources, the company aims to displace a significant portion of crude oil use and contribute to a circular carbon economy, ultimately reducing global CO2 emissions. LanzaTech's approach not only addresses the carbon crisis but also provides a pathway for sustainable consumer goods.
LuxWall
Venture Round in 2023
LuxWall is a building materials company that pioneers the design and manufacture of vacuum-insulated glass. LuxWall produces glass that acts as transparent insulation, providing thermal insulation values comparable to fiberglass wall insulation. With widespread adoption, LuxWall's patented technology has the potential to reduce global carbon emissions by more than 0.5 gigatonnes per year. The company was founded in 2020 and is headquartered in Ypsilanti, Michigan, United States.
Mainspring
Series E in 2022
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Genecis is an early-stage organic waste processing startup that uses biotechnology to convert waste into biodegradable plastics and other high-value materials. It converts organic waste into PHA (Polyhydroxyalkanoate), a biodegradable, compostable, and non-toxic polymer that can be tuned to replace a wide variety of traditional plastics. PHA can be used for single-use plastics, clothing and textiles, automotive interiors, medical tools and products, and food contact applications.
Li Industries
Series A in 2022
Li Industries is a start-up focused on advancing lithium-ion battery recycling technologies. The company specializes in the recovery of valuable materials such as lithium, cobalt, and nickel from end-of-life batteries used in electric vehicles, consumer electronics, and other energy storage systems. By utilizing innovative direct recycling technology and a scalable electrochemical flow system, Li Industries aims to extract these essential metals efficiently and sustainably. This process not only reduces environmental waste but also supports the production of new batteries from recycled components. By optimizing the recovery and treatment of these materials, Li Industries contributes to lowering energy consumption and emissions in the battery production process, ultimately fostering a more sustainable supply chain for battery manufacturing.
Sonocharge
Seed Round in 2022
Sonocharge Energy is focused on developing innovative battery technology that enhances the performance of rechargeable, energy-dense, and long-duration batteries. Its platform technology facilitates efficient charging, which is applicable across various markets, including transportation, electric vehicles, e-mobility, electric bikes, scooters, aerospace, electric airplanes, and drones. By improving battery performance and safety, Sonocharge addresses the growing demand for higher power density and energy solutions across multiple industries.
TeraWatt Technology
Series B in 2022
TeraWatt Technology Inc., founded in 2017 and headquartered in Santa Clara, California, with a subsidiary in Tokyo, Japan, specializes in the design and development of lithium-ion rechargeable batteries for various electrified applications. The company focuses on manufacturing batteries that combine energy and power density with safety, catering to industrial clients in need of long-lasting and reliable power solutions. TeraWatt Technology employs competitive engineering practices and production processes to ensure high-quality battery performance, positioning itself as a key player in the rechargeable battery market.
Nitricity
Venture Round in 2022
Nitricity is an energy company specializing in the production of renewable nitrogen fertilizers with zero carbon emissions. It manufactures nitric acid and ammonia, which can be used independently or combined to create ammonium nitrate fertilizer. This enables farmers worldwide to minimize wasteful runoff, apply fertilizers optimally, and maximize crop yield.
Mainspring
Series E in 2022
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Aether Diamonds
Series A in 2022
Aether Diamonds produces the world's first and only diamonds made 100% from captured carbon. Certified B Corp. 2022 Fast Company Top 10 Most Innovative Consumer Goods Companies. 2022 "Best for the World" B Corp.
Verdagy is a California-based company that focuses on advancing water electrolysis technology to enable large-scale production of green hydrogen. By developing high-performance cells and electrolyzers, Verdagy aims to achieve the lowest upfront capital and operating expenses in the industry, resulting in a highly competitive levelized cost of hydrogen. Their facilities in Moss Landing include laboratory and pilot plant operations, which are dedicated to refining and scaling their innovative technology platform. This approach not only promotes the use of clean energy but also offers significant cost savings for industries looking to adopt sustainable energy solutions.
Juno Residential, Inc. is a company focused on the development of residential apartments, incorporating innovative construction methods to provide environmentally friendly housing solutions. Based in San Francisco, California, Juno specializes in prefabricated houses, utilizing techniques that emphasize speed and efficiency. The company is committed to sustainability, employing organic and low-carbon materials, such as mass timber, in its projects. By offering modern and curated living spaces, Juno aims to address the growing demand for sustainable housing alternatives in urban environments. Founded in 2018, Juno Residential, Inc. was previously known as Lighthouse Residential, Inc.
Gaiascope
Seed Round in 2021
Gaiascope, Inc. is a software-as-a-service company based in Brooklyn, New York, that specializes in developing innovative analytics solutions for the energy industry. Founded in 2019, Gaiascope employs machine learning techniques to analyze large datasets, enabling energy companies and investors to better understand and navigate the complexities of the electric grid. Their user-friendly software provides critical insights, including locational marginal pricing, grid constraints, and demand forecasts, facilitating more informed decision-making in real-time trading, operations, and development. Gaiascope emphasizes transparency in its tools, which are designed to optimize the management of power markets while addressing the challenges posed by increasing renewable energy integration and evolving market dynamics.
Fortera is a company focused on developing innovative solutions for the cement and concrete industry with the aim of significantly reducing carbon dioxide emissions. It has created a process that captures industrial carbon dioxide emissions and mineralizes them to produce a more environmentally friendly form of concrete. This method not only addresses the substantial carbon footprint associated with traditional concrete production but also offers improved performance characteristics. By providing sustainable alternatives to conventional cement products, Fortera contributes to global efforts to mitigate climate change and enhance the environmental sustainability of construction practices.
Mainspring
Series D in 2021
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Natron Energy
Series D in 2020
Natron Energy, Inc. is an energy storage company based in Santa Clara, California, founded in 2012. The company specializes in the development of sodium-ion batteries, utilizing unique Prussian Blue electrode materials to offer solutions for various industrial applications. These batteries are designed for stationary uses, including uninterruptible power supply systems, lift trucks, renewable energy smoothing, and integration into smart grids and microgrids. Natron's innovative batteries are characterized by their safety, sustainability, power density, and extended cycle life, providing a cost-effective energy storage option produced from widely available materials. The company also operates a software-defined power platform to enhance its energy storage solutions. Natron Energy was formerly known as Alveo Energy, Inc. before changing its name in March 2017.
Juno Residential, Inc. is a company focused on the development of residential apartments, incorporating innovative construction methods to provide environmentally friendly housing solutions. Based in San Francisco, California, Juno specializes in prefabricated houses, utilizing techniques that emphasize speed and efficiency. The company is committed to sustainability, employing organic and low-carbon materials, such as mass timber, in its projects. By offering modern and curated living spaces, Juno aims to address the growing demand for sustainable housing alternatives in urban environments. Founded in 2018, Juno Residential, Inc. was previously known as Lighthouse Residential, Inc.
Commonwealth Fusion Systems
Series A in 2020
Commonwealth Fusion Systems LLC is an energy research company based in Cambridge, Massachusetts, focused on developing fusion energy technology to address climate change. Established in 2017 as a spin-out from the Massachusetts Institute of Technology, the company utilizes rare-earth barium copper oxide superconductor technology to enhance fusion energy production. By integrating proven physics with advanced superconducting magnet technology, Commonwealth Fusion Systems aims to accelerate the commercialization of fusion energy. The company's efforts are directed toward designing and constructing fusion machines that promise limitless and clean energy, positioning them as a key player in the transition to renewable energy sources. Through collaboration with MIT's Plasma Science and Fusion Center, the company leverages decades of government-funded research to innovate within the private sector, ultimately contributing to the global pursuit of sustainable energy solutions.
TeraWatt Technology
Seed Round in 2020
TeraWatt Technology Inc., founded in 2017 and headquartered in Santa Clara, California, with a subsidiary in Tokyo, Japan, specializes in the design and development of lithium-ion rechargeable batteries for various electrified applications. The company focuses on manufacturing batteries that combine energy and power density with safety, catering to industrial clients in need of long-lasting and reliable power solutions. TeraWatt Technology employs competitive engineering practices and production processes to ensure high-quality battery performance, positioning itself as a key player in the rechargeable battery market.
Ceibo is an industrial biotechnology company that specializes in developing innovative technologies for the mining industry. The company has created a proprietary method for leaching copper sulphide and is actively working on solutions to suppress dust generated during mining operations. Ceibo's technology is aimed at enhancing the production of critical minerals essential for the clean energy transition and is designed to optimize the recovery processes from both primary and secondary sulfide ores rich in chalcopyrite. The company is focused on scaling its technology to improve not only copper recovery but also to extend its benefits to other vital minerals. By providing these advanced solutions, Ceibo enables mining clients to enhance operational efficiency, reduce costs, and maintain environmentally sustainable practices with minimal waste.
Commonwealth Fusion Systems
Series A in 2019
Commonwealth Fusion Systems LLC is an energy research company based in Cambridge, Massachusetts, focused on developing fusion energy technology to address climate change. Established in 2017 as a spin-out from the Massachusetts Institute of Technology, the company utilizes rare-earth barium copper oxide superconductor technology to enhance fusion energy production. By integrating proven physics with advanced superconducting magnet technology, Commonwealth Fusion Systems aims to accelerate the commercialization of fusion energy. The company's efforts are directed toward designing and constructing fusion machines that promise limitless and clean energy, positioning them as a key player in the transition to renewable energy sources. Through collaboration with MIT's Plasma Science and Fusion Center, the company leverages decades of government-funded research to innovate within the private sector, ultimately contributing to the global pursuit of sustainable energy solutions.
Mainspring
Series C in 2018
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Bboxx, established in 2010 and headquartered in London, specializes in designing, manufacturing, and distributing plug-and-play solar systems. The company's product range includes solar home systems, remote monitoring products, portable lights, radios, LED TVs, and phone chargers, along with installation and maintenance services. Bboxx serves customers in the UK and internationally through a network of distributors, focusing on enhancing access to energy in developing countries, particularly in Africa. The company aims to provide a western energy experience off-grid and in rural areas, combining access to electricity with superior customer service.
SunFunder
Series B in 2015
SunFunder Inc. is a solar energy finance company based in San Francisco, California, that specializes in providing various forms of financing to solar energy enterprises, particularly in emerging markets. Founded in 2012, the company offers short-term working capital, inventory, construction, and structured finance loans to solar product distributors, manufacturers, and project developers primarily in East and West Africa, as well as Asia. SunFunder's mission is to catalyze the development of solar energy infrastructure by leveraging its expertise in the solar market and facilitating efficient due diligence processes. By acting as a financial intermediary, SunFunder enables investors to engage in high-impact, fixed-income debt offerings that support the growth of solar assets in regions with inadequate energy access.
Bboxx
Venture Round in 2015
Bboxx, established in 2010 and headquartered in London, specializes in designing, manufacturing, and distributing plug-and-play solar systems. The company's product range includes solar home systems, remote monitoring products, portable lights, radios, LED TVs, and phone chargers, along with installation and maintenance services. Bboxx serves customers in the UK and internationally through a network of distributors, focusing on enhancing access to energy in developing countries, particularly in Africa. The company aims to provide a western energy experience off-grid and in rural areas, combining access to electricity with superior customer service.
SolidEnergy Systems Corp. develops and manufactures rechargeable lithium metal batteries primarily for applications in drones, wearables, smartphones, and electric vehicles. Founded in 2012 and based in Woburn, Massachusetts, the company focuses on producing high-performance lithium metal batteries and supplying essential materials, such as anodes and electrolytes, to major lithium-ion cell manufacturers. These materials can be integrated into existing manufacturing processes, allowing for scalability without significant infrastructure investments. SolidEnergy's pilot-scale production caters to prototype demonstrations and specialized aerospace markets, while its future growth is aimed at mainstream sectors like consumer electronics and electric vehicles. Additionally, the company is involved in developing AI-powered safety algorithms and recycling solutions, positioning itself as an integrated battery manufacturer with a commitment to innovation and sustainability.
Sakti3, Inc. is a Michigan-based company focused on the development of solid-state rechargeable lithium-ion battery technology. Founded in 2007 and headquartered in Ann Arbor, the company aims to enhance battery performance for electric vehicles and portable electronics. By creating solid-state battery cells, Sakti3 seeks to provide a safer and more efficient alternative to traditional battery technologies, facilitating the transition to electric-powered transportation and devices. As of 2015, Sakti3 operates as a subsidiary of Dyson Ltd.
Seeo, Inc. is a manufacturer of rechargeable lithium polymer batteries, specializing in advanced battery technology that utilizes a nano-structured polymer electrolyte. Founded in 2007 and headquartered in Hayward, California, with additional facilities in Shanghai, China, Seeo focuses on providing safe and high-energy storage solutions for various markets, including transportation, electric grids, and telecommunication backup. The company's solid-state batteries are designed to be lightweight and environmentally friendly, featuring no flammable or volatile components. This innovative design enhances safety by reducing vulnerability to fires in demanding conditions, such as crush or over-voltage scenarios, while also promoting efficient use of raw materials and extending operational range for users. As of 2015, Seeo operates as a subsidiary of Robert Bosch GmbH.
LanzaTech
Series D in 2014
LanzaTech, Inc. is a carbon recycling company based in Skokie, Illinois, with additional offices in Roselle, Illinois; Shanghai, China; and Gurgaon, India. Founded in 2005, the company specializes in producing fuel ethanol from renewable non-food resources, including industrial flue gases and waste gases generated from municipal solid waste and biomass gasification. LanzaTech’s innovative technology converts carbon emissions into valuable products, effectively retrofitting industrial emission sources, such as steel mills, to create sustainable fuels, fabrics, and packaging. By recycling carbon from various sources, the company aims to displace a significant portion of crude oil use and contribute to a circular carbon economy, ultimately reducing global CO2 emissions. LanzaTech's approach not only addresses the carbon crisis but also provides a pathway for sustainable consumer goods.
SunFunder
Series A in 2014
SunFunder Inc. is a solar energy finance company based in San Francisco, California, that specializes in providing various forms of financing to solar energy enterprises, particularly in emerging markets. Founded in 2012, the company offers short-term working capital, inventory, construction, and structured finance loans to solar product distributors, manufacturers, and project developers primarily in East and West Africa, as well as Asia. SunFunder's mission is to catalyze the development of solar energy infrastructure by leveraging its expertise in the solar market and facilitating efficient due diligence processes. By acting as a financial intermediary, SunFunder enables investors to engage in high-impact, fixed-income debt offerings that support the growth of solar assets in regions with inadequate energy access.
Ambri, Inc., established in 2010 and headquartered in Marlborough, Massachusetts, specializes in developing electricity storage solutions for electric grids. The company is renowned for its liquid metal battery cell technology, designed to be low-cost, long-lasting, and capable of storing large amounts of energy. Ambri's batteries are intended for use in renewable energy systems, grid stabilization, and other large-scale applications where reliable and efficient energy storage is crucial.
Caelux
Venture Round in 2014
Caelux is a renewable energy company based in Pasadena, California, founded in 2014. It specializes in developing and manufacturing perovskite-on-glass technology for the terrestrial solar and commercial space industries. This innovative technology is designed to enhance solar device efficiency while minimizing the amount of semiconducting material required, thereby reducing production costs. Caelux's products improve power production and integrate seamlessly into existing photovoltaic module manufacturing processes, allowing users to lower installed costs and boost overall performance.
LanzaTech
Series C in 2013
LanzaTech, Inc. is a carbon recycling company based in Skokie, Illinois, with additional offices in Roselle, Illinois; Shanghai, China; and Gurgaon, India. Founded in 2005, the company specializes in producing fuel ethanol from renewable non-food resources, including industrial flue gases and waste gases generated from municipal solid waste and biomass gasification. LanzaTech’s innovative technology converts carbon emissions into valuable products, effectively retrofitting industrial emission sources, such as steel mills, to create sustainable fuels, fabrics, and packaging. By recycling carbon from various sources, the company aims to displace a significant portion of crude oil use and contribute to a circular carbon economy, ultimately reducing global CO2 emissions. LanzaTech's approach not only addresses the carbon crisis but also provides a pathway for sustainable consumer goods.
Bboxx, established in 2010 and headquartered in London, specializes in designing, manufacturing, and distributing plug-and-play solar systems. The company's product range includes solar home systems, remote monitoring products, portable lights, radios, LED TVs, and phone chargers, along with installation and maintenance services. Bboxx serves customers in the UK and internationally through a network of distributors, focusing on enhancing access to energy in developing countries, particularly in Africa. The company aims to provide a western energy experience off-grid and in rural areas, combining access to electricity with superior customer service.
KiOR, Inc. is a renewable fuels company that specializes in the production of cellulosic gasoline and diesel derived from lignocellulosic biomass. Utilizing its proprietary biomass-to-cellulosic fuel technology platform, the company aims to provide sustainable fuel alternatives to refiners, terminal and rack owners, as well as fleet operators. Founded in 2007 and headquartered in Pasadena, Texas, KiOR is committed to addressing the growing demand for renewable energy solutions in the transportation sector.
Coskata
Debt Financing in 2013
Coskata, Inc. is a renewable energy company focused on producing liquid fuels through innovative biological processes. The company specializes in the development of technologies for converting various input materials, including natural gas, wood, and industrial waste, into cellulosic ethanol. Utilizing proprietary microorganisms and advanced bioreactor designs, Coskata aims to deliver solutions that enhance economic viability, environmental sustainability, and national security. Its capabilities in molecular biology and process engineering enable the effective transformation of diverse resources into valuable fuels and chemicals, positioning Coskata as a leader in the renewable energy sector.
GreenLight Biosciences
Series A in 2013
GreenLight Biosciences, Inc. is a biotechnology company headquartered in Medford, Massachusetts, with an additional location in North Carolina. Founded in 2008, the company specializes in developing RNA-based solutions for agricultural and pharmaceutical purposes. It offers a proprietary technology platform that enables the efficient and cost-effective production of high-quality RNA, facilitating advancements in vaccine development, pandemic response, crop management, and the protection of pollinators. GreenLight develops mRNA-based vaccine candidates, including those aimed at preventing SARS-CoV-2 infections, and engages in collaborative efforts with industry leaders to further enhance its offerings. Through its innovative approach, GreenLight aims to contribute significantly to sustainable global development and food security.
LightSail Energy
Series D in 2013
LightSail Energy focuses on the development of advanced energy storage systems that utilize compressed air technology. The company aims to modernize the electrical grid globally by providing efficient, grid-scale energy storage solutions. These systems are designed to enhance the reliability of renewable energy sources, such as solar and wind, allowing for on-demand energy delivery. By shifting its emphasis from vehicle-based technologies to large-scale applications, LightSail Energy offers clients cost-effective options for energy storage, contributing to a more sustainable energy landscape.
Natron Energy
Series A in 2013
Natron Energy, Inc. is an energy storage company based in Santa Clara, California, founded in 2012. The company specializes in the development of sodium-ion batteries, utilizing unique Prussian Blue electrode materials to offer solutions for various industrial applications. These batteries are designed for stationary uses, including uninterruptible power supply systems, lift trucks, renewable energy smoothing, and integration into smart grids and microgrids. Natron's innovative batteries are characterized by their safety, sustainability, power density, and extended cycle life, providing a cost-effective energy storage option produced from widely available materials. The company also operates a software-defined power platform to enhance its energy storage solutions. Natron Energy was formerly known as Alveo Energy, Inc. before changing its name in March 2017.
Stion
Private Equity Round in 2012
Stion Corporation is a manufacturer of thin-film solar modules, established in 2006 and headquartered in San Jose, California, with a manufacturing facility in Hattiesburg, Mississippi. The company specializes in developing high-efficiency solar modules that offer reduced material and processing costs, enhancing their power output and reliability. Stion’s products are designed for a variety of applications, including residential, commercial, utility, and off-grid uses. The company markets its solar modules through a network of authorized dealers both in the United States and internationally. By utilizing innovative cell architecture and all-weather construction, Stion aims to lower the overall costs of electricity and improve the efficiency of solar power generation.
LightSail Energy
Series D in 2012
LightSail Energy focuses on the development of advanced energy storage systems that utilize compressed air technology. The company aims to modernize the electrical grid globally by providing efficient, grid-scale energy storage solutions. These systems are designed to enhance the reliability of renewable energy sources, such as solar and wind, allowing for on-demand energy delivery. By shifting its emphasis from vehicle-based technologies to large-scale applications, LightSail Energy offers clients cost-effective options for energy storage, contributing to a more sustainable energy landscape.
Segetis, Inc. is a green chemistry company based in Golden Valley, Minnesota, specializing in the development, production, and commercialization of renewable polymers. Founded in 2006, Segetis focuses on a platform of binary monomers derived from renewable feedstocks, including non-food agricultural and forestry materials. The company's innovative technology supports the production of a range of industrial bioproducts such as bio-plastics, surfactants, plasticizers, adhesives, and coalescent solvents, catering to specialty chemical applications. Segetis's chemistries create opportunities for product enablement and synergies across various industries, including those involved in the processing of starch, sugar crops, wood, cellulose, and paper pulp, as well as the chemical processing of vegetable oils and the manufacturing of biodiesel and linear alpha-olefins.
Ambri, Inc., established in 2010 and headquartered in Marlborough, Massachusetts, specializes in developing electricity storage solutions for electric grids. The company is renowned for its liquid metal battery cell technology, designed to be low-cost, long-lasting, and capable of storing large amounts of energy. Ambri's batteries are intended for use in renewable energy systems, grid stabilization, and other large-scale applications where reliable and efficient energy storage is crucial.
Virdia
Debt Financing in 2012
Virdia, formerly known as HCL CleanTech, is a prominent developer specializing in the conversion of lignocellulosic biomass into cellulosic sugars and lignin for applications in the renewable chemicals, bio-energy, and nutrition sectors. Utilizing its proprietary CASE™ process, the company transforms a diverse range of feedstocks, including wood, energy crops, and agricultural residues, into highly refined sugars and lignin. This innovative low-temperature process achieves high yields of sugars from biomass while maintaining a minimal environmental impact through the near complete recycling of acids and solvents used during production. Virdia is guided by an experienced management team with extensive backgrounds in corn processing, chemicals, and biochemicals.
KiOR, Inc. is a renewable fuels company that specializes in the production of cellulosic gasoline and diesel derived from lignocellulosic biomass. Utilizing its proprietary biomass-to-cellulosic fuel technology platform, the company aims to provide sustainable fuel alternatives to refiners, terminal and rack owners, as well as fleet operators. Founded in 2007 and headquartered in Pasadena, Texas, KiOR is committed to addressing the growing demand for renewable energy solutions in the transportation sector.
Stion
Private Equity Round in 2011
Stion Corporation is a manufacturer of thin-film solar modules, established in 2006 and headquartered in San Jose, California, with a manufacturing facility in Hattiesburg, Mississippi. The company specializes in developing high-efficiency solar modules that offer reduced material and processing costs, enhancing their power output and reliability. Stion’s products are designed for a variety of applications, including residential, commercial, utility, and off-grid uses. The company markets its solar modules through a network of authorized dealers both in the United States and internationally. By utilizing innovative cell architecture and all-weather construction, Stion aims to lower the overall costs of electricity and improve the efficiency of solar power generation.
Danotek Motion Technologies
Series B in 2011
Danotek Motion Technologies Inc, founded in 2001, in Ann Arbor, Michigan is an ISO 9001:2000 certified technology innovator. Danotek develops clean, energy efficient, generators, electrical conversion systems, brushless motors and electronics controls for alternative energy and advanced transportation applications. Danotek has developed a number of patent-pending innovative products that include variable speed permanent magnet (PM) generators and brushless motors with integrated electronics for wind power, fuel cell, CHP, auxiliary power and electric and hybrid electric vehicles. Their designs represent industry leadership and are expected to replace inefficient and unreliable systems with added extensive control features.
Coskata, Inc. is a renewable energy company focused on producing liquid fuels through innovative biological processes. The company specializes in the development of technologies for converting various input materials, including natural gas, wood, and industrial waste, into cellulosic ethanol. Utilizing proprietary microorganisms and advanced bioreactor designs, Coskata aims to deliver solutions that enhance economic viability, environmental sustainability, and national security. Its capabilities in molecular biology and process engineering enable the effective transformation of diverse resources into valuable fuels and chemicals, positioning Coskata as a leader in the renewable energy sector.
Seeo, Inc. is a manufacturer of rechargeable lithium polymer batteries, specializing in advanced battery technology that utilizes a nano-structured polymer electrolyte. Founded in 2007 and headquartered in Hayward, California, with additional facilities in Shanghai, China, Seeo focuses on providing safe and high-energy storage solutions for various markets, including transportation, electric grids, and telecommunication backup. The company's solid-state batteries are designed to be lightweight and environmentally friendly, featuring no flammable or volatile components. This innovative design enhances safety by reducing vulnerability to fires in demanding conditions, such as crush or over-voltage scenarios, while also promoting efficient use of raw materials and extending operational range for users. As of 2015, Seeo operates as a subsidiary of Robert Bosch GmbH.
Ciris Energy
Series B in 2011
Ciris Energy, Inc. is a technology company founded in 2007 and based in Centennial, Colorado. It specializes in the development of proprietary technologies aimed at producing electricity from buried coal and other hydrocarbon deposits. The company focuses on biologically converting coal to methane in large-scale quantities, striving to create a more environmentally responsible and economically efficient method of producing natural gas from coal. Through its innovative approaches, Ciris Energy seeks to enable clients to access coal as a renewable form of energy.
QuantumScape
Venture Round in 2011
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.
LS9, known as the Renewable Petroleum Company, is a privately-held industrial biotechnology firm based in South San Francisco, California. The company focuses on the development and production of patent-pending UltraClean fuels and sustainable chemicals utilizing synthetic biology. By harnessing advanced industrial synthetic biology techniques, LS9 aims to create renewable petroleum biofuels that serve as eco-friendly alternatives to traditional fossil fuels.
EchoFirst
Series B in 2010
EchoFirst is a manufacturer specializing in integrated solar energy systems designed to meet the electric and heating needs of residential properties. Its innovative Echo solar systems surpass the energy output of traditional photovoltaic systems by generating electricity along with hot water for household uses such as washing and bathing, as well as providing thermal energy for home heating and cooling. The company serves a diverse clientele, including homeowners, installation partners, and developers of new homes, aiming to enhance energy efficiency and sustainability in residential environments.
Sakti3, Inc. is a Michigan-based company focused on the development of solid-state rechargeable lithium-ion battery technology. Founded in 2007 and headquartered in Ann Arbor, the company aims to enhance battery performance for electric vehicles and portable electronics. By creating solid-state battery cells, Sakti3 seeks to provide a safer and more efficient alternative to traditional battery technologies, facilitating the transition to electric-powered transportation and devices. As of 2015, Sakti3 operates as a subsidiary of Dyson Ltd.
Coskata, Inc. is a renewable energy company focused on producing liquid fuels through innovative biological processes. The company specializes in the development of technologies for converting various input materials, including natural gas, wood, and industrial waste, into cellulosic ethanol. Utilizing proprietary microorganisms and advanced bioreactor designs, Coskata aims to deliver solutions that enhance economic viability, environmental sustainability, and national security. Its capabilities in molecular biology and process engineering enable the effective transformation of diverse resources into valuable fuels and chemicals, positioning Coskata as a leader in the renewable energy sector.
Kior
Private Equity Round in 2010
KiOR, Inc. is a renewable fuels company that specializes in the production of cellulosic gasoline and diesel derived from lignocellulosic biomass. Utilizing its proprietary biomass-to-cellulosic fuel technology platform, the company aims to provide sustainable fuel alternatives to refiners, terminal and rack owners, as well as fleet operators. Founded in 2007 and headquartered in Pasadena, Texas, KiOR is committed to addressing the growing demand for renewable energy solutions in the transportation sector.
LanzaTech
Series B in 2010
LanzaTech, Inc. is a carbon recycling company based in Skokie, Illinois, with additional offices in Roselle, Illinois; Shanghai, China; and Gurgaon, India. Founded in 2005, the company specializes in producing fuel ethanol from renewable non-food resources, including industrial flue gases and waste gases generated from municipal solid waste and biomass gasification. LanzaTech’s innovative technology converts carbon emissions into valuable products, effectively retrofitting industrial emission sources, such as steel mills, to create sustainable fuels, fabrics, and packaging. By recycling carbon from various sources, the company aims to displace a significant portion of crude oil use and contribute to a circular carbon economy, ultimately reducing global CO2 emissions. LanzaTech's approach not only addresses the carbon crisis but also provides a pathway for sustainable consumer goods.
Stion Corporation is a manufacturer of thin-film solar modules, established in 2006 and headquartered in San Jose, California, with a manufacturing facility in Hattiesburg, Mississippi. The company specializes in developing high-efficiency solar modules that offer reduced material and processing costs, enhancing their power output and reliability. Stion’s products are designed for a variety of applications, including residential, commercial, utility, and off-grid uses. The company markets its solar modules through a network of authorized dealers both in the United States and internationally. By utilizing innovative cell architecture and all-weather construction, Stion aims to lower the overall costs of electricity and improve the efficiency of solar power generation.
Gevo, Inc. is a renewable fuels company based in Englewood, Colorado, focused on developing and commercializing sustainable alternatives to petroleum-based products. Founded in 2005, Gevo specializes in producing renewable fuels such as gasoline, jet fuel, and diesel, as well as chemicals derived from isobutanol, a key product made from low-carbon renewable feedstocks. The company's offerings include renewable biodiesel, sustainable aviation fuel, isobutylene, ethanol, and animal feed. Gevo is also engaged in producing renewable electricity and natural gas to support its operations. Through its various segments, Gevo conducts research and development aimed at advancing biofuels and biochemicals, including innovative technologies for the production of sustainable aviation fuel and other renewable hydrocarbon products, while actively working to reduce greenhouse gas emissions.
Segetis, Inc. is a green chemistry company based in Golden Valley, Minnesota, specializing in the development, production, and commercialization of renewable polymers. Founded in 2006, Segetis focuses on a platform of binary monomers derived from renewable feedstocks, including non-food agricultural and forestry materials. The company's innovative technology supports the production of a range of industrial bioproducts such as bio-plastics, surfactants, plasticizers, adhesives, and coalescent solvents, catering to specialty chemical applications. Segetis's chemistries create opportunities for product enablement and synergies across various industries, including those involved in the processing of starch, sugar crops, wood, cellulose, and paper pulp, as well as the chemical processing of vegetable oils and the manufacturing of biodiesel and linear alpha-olefins.
Nordic Windpower
Series C in 2010
Nordic’s N1000, a simple, light-weight 1MW wind turbine is known for its unsurpassed ease of installation and maintenance, exceptional reliability, and low cost of energy generation. Nordic Windpower is a technology developer and manufacturer of innovative, two-bladed wind turbines for the rapidly expanding global wind market.
QuantumScape
Seed Round in 2010
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.
Mainspring
Seed Round in 2010
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
Danotek Motion Technologies
Venture Round in 2009
Danotek Motion Technologies Inc, founded in 2001, in Ann Arbor, Michigan is an ISO 9001:2000 certified technology innovator. Danotek develops clean, energy efficient, generators, electrical conversion systems, brushless motors and electronics controls for alternative energy and advanced transportation applications. Danotek has developed a number of patent-pending innovative products that include variable speed permanent magnet (PM) generators and brushless motors with integrated electronics for wind power, fuel cell, CHP, auxiliary power and electric and hybrid electric vehicles. Their designs represent industry leadership and are expected to replace inefficient and unreliable systems with added extensive control features.
LS9, known as the Renewable Petroleum Company, is a privately-held industrial biotechnology firm based in South San Francisco, California. The company focuses on the development and production of patent-pending UltraClean fuels and sustainable chemicals utilizing synthetic biology. By harnessing advanced industrial synthetic biology techniques, LS9 aims to create renewable petroleum biofuels that serve as eco-friendly alternatives to traditional fossil fuels.
Amyris, Inc. is a biotechnology company headquartered in Emeryville, California, specializing in the development of microbial strains to produce sustainable ingredients from renewable plant-sourced sugars. Founded in 2003, Amyris utilizes its industrial synthetic biology platform to engineer and manufacture a wide range of products, including ingredients for cosmetics, flavors, fragrances, healthcare, and fuels. The company’s innovative technology enables the conversion of plant sugars into high-value hydrocarbon molecules, providing no-compromise alternatives to petroleum-based products. Amyris operates under several trademarks, including Biofene and Biossance, and collaborates with organizations such as the Infectious Disease Research Institute to advance health-related initiatives, including vaccine development. The company generates revenue from product sales, intellectual property licensing, and collaborative research efforts, with a significant portion of its business occurring in the United States.
Seeo, Inc. is a manufacturer of rechargeable lithium polymer batteries, specializing in advanced battery technology that utilizes a nano-structured polymer electrolyte. Founded in 2007 and headquartered in Hayward, California, with additional facilities in Shanghai, China, Seeo focuses on providing safe and high-energy storage solutions for various markets, including transportation, electric grids, and telecommunication backup. The company's solid-state batteries are designed to be lightweight and environmentally friendly, featuring no flammable or volatile components. This innovative design enhances safety by reducing vulnerability to fires in demanding conditions, such as crush or over-voltage scenarios, while also promoting efficient use of raw materials and extending operational range for users. As of 2015, Seeo operates as a subsidiary of Robert Bosch GmbH.
Gevo
Venture Round in 2009
Gevo, Inc. is a renewable fuels company based in Englewood, Colorado, focused on developing and commercializing sustainable alternatives to petroleum-based products. Founded in 2005, Gevo specializes in producing renewable fuels such as gasoline, jet fuel, and diesel, as well as chemicals derived from isobutanol, a key product made from low-carbon renewable feedstocks. The company's offerings include renewable biodiesel, sustainable aviation fuel, isobutylene, ethanol, and animal feed. Gevo is also engaged in producing renewable electricity and natural gas to support its operations. Through its various segments, Gevo conducts research and development aimed at advancing biofuels and biochemicals, including innovative technologies for the production of sustainable aviation fuel and other renewable hydrocarbon products, while actively working to reduce greenhouse gas emissions.
Virdia, formerly known as HCL CleanTech, is a prominent developer specializing in the conversion of lignocellulosic biomass into cellulosic sugars and lignin for applications in the renewable chemicals, bio-energy, and nutrition sectors. Utilizing its proprietary CASE™ process, the company transforms a diverse range of feedstocks, including wood, energy crops, and agricultural residues, into highly refined sugars and lignin. This innovative low-temperature process achieves high yields of sugars from biomass while maintaining a minimal environmental impact through the near complete recycling of acids and solvents used during production. Virdia is guided by an experienced management team with extensive backgrounds in corn processing, chemicals, and biochemicals.
Ausra
Venture Round in 2009
Ausra is a manufacturer and developer of utility-scale solar technologies aimed at addressing global electricity demands in an environmentally responsible manner. The company specializes in solar thermal power infrastructure, particularly through its compact linear Fresnel reflector systems, which utilize focused sunlight to boil water and generate high-pressure steam that powers conventional turbine generators. Ausra is also advancing low-cost thermal energy storage systems, enabling the generation of solar electric power on demand, both during daylight and nighttime hours. By providing zero-carbon power plants, Ausra offers a viable alternative to fossil-fuel-based electricity generation, delivering energy at competitive market prices while minimizing emissions associated with traditional fuel combustion.
Sakti3, Inc. is a Michigan-based company focused on the development of solid-state rechargeable lithium-ion battery technology. Founded in 2007 and headquartered in Ann Arbor, the company aims to enhance battery performance for electric vehicles and portable electronics. By creating solid-state battery cells, Sakti3 seeks to provide a safer and more efficient alternative to traditional battery technologies, facilitating the transition to electric-powered transportation and devices. As of 2015, Sakti3 operates as a subsidiary of Dyson Ltd.
Coskata, Inc. is a renewable energy company focused on producing liquid fuels through innovative biological processes. The company specializes in the development of technologies for converting various input materials, including natural gas, wood, and industrial waste, into cellulosic ethanol. Utilizing proprietary microorganisms and advanced bioreactor designs, Coskata aims to deliver solutions that enhance economic viability, environmental sustainability, and national security. Its capabilities in molecular biology and process engineering enable the effective transformation of diverse resources into valuable fuels and chemicals, positioning Coskata as a leader in the renewable energy sector.
Amyris, Inc. is a biotechnology company headquartered in Emeryville, California, specializing in the development of microbial strains to produce sustainable ingredients from renewable plant-sourced sugars. Founded in 2003, Amyris utilizes its industrial synthetic biology platform to engineer and manufacture a wide range of products, including ingredients for cosmetics, flavors, fragrances, healthcare, and fuels. The company’s innovative technology enables the conversion of plant sugars into high-value hydrocarbon molecules, providing no-compromise alternatives to petroleum-based products. Amyris operates under several trademarks, including Biofene and Biossance, and collaborates with organizations such as the Infectious Disease Research Institute to advance health-related initiatives, including vaccine development. The company generates revenue from product sales, intellectual property licensing, and collaborative research efforts, with a significant portion of its business occurring in the United States.
Ausra is a manufacturer and developer of utility-scale solar technologies aimed at addressing global electricity demands in an environmentally responsible manner. The company specializes in solar thermal power infrastructure, particularly through its compact linear Fresnel reflector systems, which utilize focused sunlight to boil water and generate high-pressure steam that powers conventional turbine generators. Ausra is also advancing low-cost thermal energy storage systems, enabling the generation of solar electric power on demand, both during daylight and nighttime hours. By providing zero-carbon power plants, Ausra offers a viable alternative to fossil-fuel-based electricity generation, delivering energy at competitive market prices while minimizing emissions associated with traditional fuel combustion.
AltaRock Energy, Inc., established in 2007, is a geothermal energy technology and services company. Headquartered in Seattle, Washington, with additional offices in Sausalito, California, AltaRock specializes in the development and commercialization of geothermal technology to produce clean, renewable power. The company offers a range of services, including project development, management, operations, performance improvement, and reservoir maintenance for both new and existing geothermal projects. AltaRock is also involved in greenfield enhanced geothermal systems projects and commercial stimulation services, aiming to expand the capacity of existing geothermal resources and increase profitability. The company's leadership includes Don O'Shei, Chief Executive Officer, and Susan Petty, President and Chief Technology Officer.
KiOR, Inc. is a renewable fuels company that specializes in the production of cellulosic gasoline and diesel derived from lignocellulosic biomass. Utilizing its proprietary biomass-to-cellulosic fuel technology platform, the company aims to provide sustainable fuel alternatives to refiners, terminal and rack owners, as well as fleet operators. Founded in 2007 and headquartered in Pasadena, Texas, KiOR is committed to addressing the growing demand for renewable energy solutions in the transportation sector.
Gevo, Inc. is a renewable fuels company based in Englewood, Colorado, focused on developing and commercializing sustainable alternatives to petroleum-based products. Founded in 2005, Gevo specializes in producing renewable fuels such as gasoline, jet fuel, and diesel, as well as chemicals derived from isobutanol, a key product made from low-carbon renewable feedstocks. The company's offerings include renewable biodiesel, sustainable aviation fuel, isobutylene, ethanol, and animal feed. Gevo is also engaged in producing renewable electricity and natural gas to support its operations. Through its various segments, Gevo conducts research and development aimed at advancing biofuels and biochemicals, including innovative technologies for the production of sustainable aviation fuel and other renewable hydrocarbon products, while actively working to reduce greenhouse gas emissions.
Mascoma Corporation, established in late 2005, focuses on producing cellulosic ethanol derived from renewable resources such as wood and switchgrass. The company aims to provide a sustainable alternative to gasoline through its innovative biofuel technology. Initial funding was secured from Khosla Ventures and Flagship Ventures, followed by additional capital through Series B and Series C funding rounds in 2006 and 2008, respectively. Mascoma is dedicated to advancing the commercialization of cellulosic ethanol to contribute to cleaner energy solutions.
Infinia Corporation is a solar energy technology company that specializes in the development of innovative power generation systems. The company's flagship product, the PowerDish, is a proprietary solar power generation device that efficiently converts solar energy into electricity. Infinia also provides micro combined heat and power systems targeted at residential energy consumers, as well as solar and biomass-powered electric generators designed for various applications, including deep space missions and remote power needs. The PowerDish is aimed at energy asset developers, utilities, and commercial companies involved in large-scale solar projects, with a global launch anticipated to have begun in late 2010.
Range Fuels
Series C in 2008
Range Fuels is a privately held company funded primarily by greentech venture capital companies, including Khosla Ventures, LLC, arguably the top venture firm in the U.S. focusing on alternative, clean energy systems. Their leadership team melds experience from the technologically intensive oil, chemical, petrochemical, coal gasification, power and gas-to-liquids industries, the renewable fuel industry, and the pulp and paper industry.
Range Fuels
Series B in 2008
Range Fuels is a privately held company funded primarily by greentech venture capital companies, including Khosla Ventures, LLC, arguably the top venture firm in the U.S. focusing on alternative, clean energy systems. Their leadership team melds experience from the technologically intensive oil, chemical, petrochemical, coal gasification, power and gas-to-liquids industries, the renewable fuel industry, and the pulp and paper industry.
Seeo, Inc. is a manufacturer of rechargeable lithium polymer batteries, specializing in advanced battery technology that utilizes a nano-structured polymer electrolyte. Founded in 2007 and headquartered in Hayward, California, with additional facilities in Shanghai, China, Seeo focuses on providing safe and high-energy storage solutions for various markets, including transportation, electric grids, and telecommunication backup. The company's solid-state batteries are designed to be lightweight and environmentally friendly, featuring no flammable or volatile components. This innovative design enhances safety by reducing vulnerability to fires in demanding conditions, such as crush or over-voltage scenarios, while also promoting efficient use of raw materials and extending operational range for users. As of 2015, Seeo operates as a subsidiary of Robert Bosch GmbH.
Coskata, Inc. is a renewable energy company focused on producing liquid fuels through innovative biological processes. The company specializes in the development of technologies for converting various input materials, including natural gas, wood, and industrial waste, into cellulosic ethanol. Utilizing proprietary microorganisms and advanced bioreactor designs, Coskata aims to deliver solutions that enhance economic viability, environmental sustainability, and national security. Its capabilities in molecular biology and process engineering enable the effective transformation of diverse resources into valuable fuels and chemicals, positioning Coskata as a leader in the renewable energy sector.
Ausra
Debt Financing in 2008
Ausra is a manufacturer and developer of utility-scale solar technologies aimed at addressing global electricity demands in an environmentally responsible manner. The company specializes in solar thermal power infrastructure, particularly through its compact linear Fresnel reflector systems, which utilize focused sunlight to boil water and generate high-pressure steam that powers conventional turbine generators. Ausra is also advancing low-cost thermal energy storage systems, enabling the generation of solar electric power on demand, both during daylight and nighttime hours. By providing zero-carbon power plants, Ausra offers a viable alternative to fossil-fuel-based electricity generation, delivering energy at competitive market prices while minimizing emissions associated with traditional fuel combustion.