Iberdrola and Endesa are the two largest electricity providers in Spain. Based on the number of clients, both companies had a market share of 34 and 33 percent in 2022, respectively. Based on sales, Endesa had a market share of 30 percent and Iberdrola of 26 percent in that same year.
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Comisión Nacional de los Mercados y la Competencia. (April 30, 2024). Market share of the main electricity providers in Spain in 2022, based on number of clients [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 01, 2026, from /statistics/1359319/market-share-of-electricity-providers-clients-spain/
Comisión Nacional de los Mercados y la Competencia. "Market share of the main electricity providers in Spain in 2022, based on number of clients." Chart. April 30, 2024. ÌÇÐÄÆƽâ°æ. Accessed August 01, 2026. /statistics/1359319/market-share-of-electricity-providers-clients-spain/
Comisión Nacional de los Mercados y la Competencia. (2024). Market share of the main electricity providers in Spain in 2022, based on number of clients. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 01, 2026. /statistics/1359319/market-share-of-electricity-providers-clients-spain/
Comisión Nacional de los Mercados y la Competencia. "Market Share of The Main Electricity Providers in Spain in 2022, Based on Number of Clients." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Apr 2024, /statistics/1359319/market-share-of-electricity-providers-clients-spain/
Comisión Nacional de los Mercados y la Competencia, Market share of the main electricity providers in Spain in 2022, based on number of clients ÌÇÐÄÆƽâ°æ, /statistics/1359319/market-share-of-electricity-providers-clients-spain/ (last visited August 01, 2026)
Market share of the main electricity providers in Spain in 2022, based on number of clients [Graph], Comisión Nacional de los Mercados y la Competencia, April 30, 2024. [Online]. Available: /statistics/1359319/market-share-of-electricity-providers-clients-spain/
