Uniper SE is an energy company based in Düsseldorf, Germany, operating in Germany, the United Kingdom, Sweden, the rest of Europe, and internationally. It operates through three segments: Green Generation, Flexible Generation, and Greener Commodities. Green Generation operates renewable and low-carbon power generation facilities, including hydroelectric, nuclear, wind, and solar plants. Flexible Generation operates gas-fired plants such as combined-cycle gas turbine plants, as well as coal- and oil-fired plants, and provides energy services. Greener Commodities optimizes and sells natural gas to distributors, large industrial customers, power plant operators, and international energy markets, and also engages in gas storage, infrastructure investments, import, trade, processing, and storage of renewable and low-carbon fuels including hydrogen, biomethane, and ammonia, fuel procurement, emission allowance trading, marketing and optimization of generated electricity, and trading of green certificates for green energy supply. The company was founded in 1894 and is a subsidiary of UBG Uniper Beteiligungsholding GmbH.