Constellation Energy (Exelon) was the investor-owned utility group with the highest share of clean electricity generation in 2021, having ** percent of electricity sourced from carbon-free sources. Ranking in second place that year was Avangrid, with a total of ** percent of their electricity generated from carbon-free sources.
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Visual Capitalist. (September 25, 2023). Investor-owned utilities ranked by share of clean electricity generated in the United States in 2021 [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved August 01, 2026, from /statistics/1417267/investor-owned-utilities-ranked-by-clean-electricity-generated-in-united-states/
Visual Capitalist. "Investor-owned utilities ranked by share of clean electricity generated in the United States in 2021." Chart. September 25, 2023. ÌÇÐÄÆÆ½â°æ. Accessed August 01, 2026. /statistics/1417267/investor-owned-utilities-ranked-by-clean-electricity-generated-in-united-states/
Visual Capitalist. (2023). Investor-owned utilities ranked by share of clean electricity generated in the United States in 2021. ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: August 01, 2026. /statistics/1417267/investor-owned-utilities-ranked-by-clean-electricity-generated-in-united-states/
Visual Capitalist. "Investor-owned Utilities Ranked by Share of Clean Electricity Generated in The United States in 2021." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 25 Sep 2023, /statistics/1417267/investor-owned-utilities-ranked-by-clean-electricity-generated-in-united-states/
Visual Capitalist, Investor-owned utilities ranked by share of clean electricity generated in the United States in 2021 ÌÇÐÄÆÆ½â°æ, /statistics/1417267/investor-owned-utilities-ranked-by-clean-electricity-generated-in-united-states/ (last visited August 01, 2026)
Investor-owned utilities ranked by share of clean electricity generated in the United States in 2021 [Graph], Visual Capitalist, September 25, 2023. [Online]. Available: /statistics/1417267/investor-owned-utilities-ranked-by-clean-electricity-generated-in-united-states/