Stegra Funding, Investors & Competitors

Climeworks is a Zurich-based direct air capture company operating modular plants like Orca and Mammoth in Iceland. The technology extracts CO2 from ambient air for permanent underground storage via mineralization with Carbfix, serving corporate net-zero commitments under Puro.earth certification standards.

Vistra Corp. is one of the largest power producers and retail energy providers in the USA. It owns 44 gigawatts of generation capacity, including natural gas (27 GW), nuclear (6.5 GW), coal (8.7 GW), and solar and battery storage (1.4 GW). The Cogentrix acquisition will add 5.5 GW of gas generation. Vistra's retail electricity business serves 5 million customers in 20 states, including almost a third of all Texas electricity consumers. Vistra emerged from the Energy Future Holdings bankruptcy as a stand-alone entity in 2016.

First Solar designs and manufactures solar photovoltaic panels, modules, and systems for use in utility-scale development projects. The company's solar modules use cadmium telluride to convert sunlight into electricity. This is commonly called thin-film technology. First Solar is the world’s largest thin-film solar module manufacturer. It has production lines in Vietnam, Malaysia, the United States, and India.

Northvolt was a Swedish battery manufacturer founded in 2015 to build the world's greenest, sustainably sourced lithium-ion batteries. Powered entirely by renewable energy (wind and hydro), Northvolt aimed to produce batteries with the lowest carbon footprint globally. Backed by heavyweights like Volkswagen and Goldman Sachs, it aimed to supply European automakers. However, facing severe scaling challenges and massive debt, the company filed for bankruptcy in 2024–2025.

1Komma5° is a Berlin-headquartered ClimateTech company delivering integrated energy solutions at 80 sites in seven markets including Germany, Austria, and the US. It installs photovoltaics systems up to 10 kWp, battery storage with 15 kWh capacity, heat pumps for heating, and EV charging stations bundled into subscription models for residential and commercial properties.

Clean Planet is a Japanese research firm developing lattice confinement fusion technology for clean heat generation without radioactive waste. Its scientists conduct experiments on gas-phase and metal-hydride systems to achieve transmutation and excess heat production. Based in Tokyo and founded on September 1, 2012, the company collaborates with universities and operates test reactors in Hokkaido. Clean Planet publishes results from quantum mechanics-based models and partners with Mitsubishi Heavy Industries for commercialization.

Electra is a steelmaking technology company that produces clean iron from high-impurity ores using electrolytic reduction powered by renewable energy. Operating a pilot plant in Boulder, Colorado since 2022, its process eliminates coking coal and cuts carbon emissions by 80% compared to blast furnaces. The company raised $85 million in Series A funding in 2023 from investors including Breakthrough Energy Ventures and works with steel producers to scale commercial facilities targeting 10 million tons annual output by 2030.

Gradiant is a Boston-headquartered cleantech company developing water treatment solutions for industrial sectors including microelectronics, pharmaceuticals, food and beverage, lithium extraction, and renewable energy. Its Carrier Gas Enhanced Separation technology removes contaminants from wastewater, enabling zero liquid discharge compliance. Deployed in facilities across Asia, Europe, and North America, Gradiant serves clients like Samsung and PepsiCo with modular systems for ultrapure water production and resource recovery.

SKIO Matrix is a Beijing-based clean energy firm specializing in electric vehicle customization, urban mobility networks, and mobile power grids. The company manufactures power batteries and operates China's largest electric vehicle service network. SKIO Matrix extends into network management and nationwide deployments for urban transportation upgrades.

Iberdrola is one of the largest utilities in the world with electric utility operations in nearly 40 countries. The company has a 57-gigawatt portfolio of hydro, wind, natural gas, and nuclear power plants. It is one of the largest owners of wind farms in the world, representing about 40% of its portfolio. Although the company has recently developed or acquired distribution and power generation assets in other geographic areas, Spain is still home to more than half of its power generation capacity. Iberdrola also owns and operates electricity and distribution networks in Spain, the UK, Brazil, and the US.

China Yangtze Power Co Ltd business activities include hydroelectric power generation, power distribution and sales, overseas power station's operation, management, consultation services, investment, and financing. It has also established its power distribution and sales platforms such as Three Gorges Water Conservancy and Peru LuzdelSur. The company owns the power generation assets of four hydropower plants on the mainstream of the Yangtze River, namely Three Gorges, Gezhouba, Xiluodu, and Xiangjiaba.

Danish company Orsted was named Dong Energy until the sale of all its oil and gas fields to Ineos in 2017, soon after the May 2016 initial public offering. Orsted is now focused on renewable assets, especially offshore wind farms. It operated 9.9 gigawatts of offshore wind farms at the end of 2024. The United Kingdom is the biggest country of operation, ahead of Germany and Denmark. The group intends to develop its footprint outside Europe with projects in Taiwan and in the US. Orsted also operates 4.8 GW of onshore wind and solar assets concentrated in the United States. The company is involved in more traditional utilities business like conventional power plants and gas supply, but these activities are noncore.

Gulf Development PCL is a Thailand-based company mainly involved in the electricity-generating business. The group's principal operations are to generate and sell electricity and steam, store and convert natural gas from liquid to gas, provide satellite services, and operate other businesses in domestic and international markets. It is also involved in the business of renewable energy, such as solar rooftops and biomass energy. The group's reportable segments are: Power business (which generates maximum revenue), Consulting business, Infrastructure business, and Satellite and digital business. Geographically, it derives maximum revenue from Thailand.

Huaneng Lancang River Hydropower Inc is engaged in the development and operation of the Lancang River and the surrounding areas of hydropower resources. The company is also engaged in the exploration of solar photovoltaic, wind power, shale gas, and other new energy construction.

Uniper SE is a Germany-based energy generation and energy trading company. The firm operates through three segments: Flexible Generation, Greener commodities, and Green Generation. The Green Generation segment comprises emission-free power generation plants that the Uniper Group operates in Europe. The Flexible Generation segment comprises the power and heat generation plants that the Uniper Group operates in Europe to flexibly meet grid operators' requirements. The Greener Commodities segment bundles the energy trading and optimization activities and forms the commercial interface between the Uniper Group and the globally traded markets for energy and the major customers. The majority of revenue is derived from the Greener Commodities segment.

EDP is a vertically integrated utility company and is the largest generator, supplier, and distributor of electricity in Portugal. In addition to Portugal, EDP has sizable operations in Spain, Brazil, and the US. EDP owns 71% of EDP Renovaveis, the fourth-largest wind power owner/operator in the world. EDP delisted Energias do Brasil in August 2023 after buying out the 46% minorities.

Constellation Energy Corp producer of carbon-free energy and a supplier of energy products and services. The company offers generating capacity that includes nuclear, wind, solar, natural gas, and hydroelectric assets. It sells electricity, natural gas, and other energy-related products and sustainable solutions to various types of customers, including distribution utilities, municipalities, cooperatives, and commercial, industrial, public sector, and residential customers in markets across multiple geographic regions. Its operating segments and reporting units are Mid-Atlantic, Midwest, New York, ERCOT, and Other Power Regions.

Adani New Industries is a wholly-owned subsidiary of Adani Enterprises headquartered in Ahmedabad that manufactures solar photovoltaic modules, wind turbine generators, green hydrogen electrolysers, and energy storage systems. Established in 2023, it operates a 4 GW solar module facility in Mundra alongside plans for 5 GW annual wind turbine production and a 2.5 GW electrolyser plant by 2026. The company supports India's green energy transition by producing high-efficiency N-type TOPCon solar cells and integrates backward into polysilicon and ingots. Its Khavda mega-factory aims for 10 GW integrated solar manufacturing capacity.