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Endesa SA, ticker ELE, is a Spain-based holding company founded in 1944, predominantly engaged in the generation, transmission, distribution, and sale of electricity. It operates in the utilities sector, focusing on both electricity and natural gas. The company also provides related services and is actively involved in the renewable energy sector, promoting sustainable energy solutions.

Constellation Energy spun off from Exelon in 2022 and is now the largest US independent power producer. After acquiring Calpine in 2026, Constellation owns 55 gigawatts of power generation capacity. Constellation is the largest nuclear plant owner in the US with 22 GW of nuclear power generation capacity in six states. It also owns 4 GW of renewable energy projects. Constellation's retail energy business serves 2.5 million customers.