Financial years ending December, except for SSE. SSE's financial year runs from April to March.
The source adds: "Following OVO’s acquisition of SSE’s domestic supply business, the aggregated domestic profit margin for 2020 does not include OVO/SSE’s data. This is because in 2020 OVO did not hold any generation licence and was not legally required to submit a Consolidated Segmental Statement."
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Aggregate profits of large energy firms in Great Britain 2009-2020
Large energy energy suppliers in Great Britain generated roughly **** billion British pounds in profits from energy generation in 2020, slightly up from the previous year. While the loss in the domestic supply segment also improved that year, an aggregated loss of *** million British pounds was still reported.
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Ofgem. (August 1, 2021). Aggregate profits of large energy suppliers in Great Britain from 2009 to 2020, by segment (in million British pounds) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 26, 2026, from /statistics/478155/big-six-aggregate-profits-from-energy-supply-and-generation-uk/
Ofgem. "Aggregate profits of large energy suppliers in Great Britain from 2009 to 2020, by segment (in million British pounds)." Chart. August 1, 2021. ÌÇÐÄÆƽâ°æ. Accessed July 26, 2026. /statistics/478155/big-six-aggregate-profits-from-energy-supply-and-generation-uk/
Ofgem. (2021). Aggregate profits of large energy suppliers in Great Britain from 2009 to 2020, by segment (in million British pounds). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 26, 2026. /statistics/478155/big-six-aggregate-profits-from-energy-supply-and-generation-uk/
Ofgem. "Aggregate Profits of Large Energy Suppliers in Great Britain from 2009 to 2020, by Segment (in Million British Pounds)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 1 Aug 2021, /statistics/478155/big-six-aggregate-profits-from-energy-supply-and-generation-uk/
Ofgem, Aggregate profits of large energy suppliers in Great Britain from 2009 to 2020, by segment (in million British pounds) ÌÇÐÄÆƽâ°æ, /statistics/478155/big-six-aggregate-profits-from-energy-supply-and-generation-uk/ (last visited July 26, 2026)
Aggregate profits of large energy suppliers in Great Britain from 2009 to 2020, by segment (in million British pounds) [Graph], Ofgem, August 1, 2021. [Online]. Available: /statistics/478155/big-six-aggregate-profits-from-energy-supply-and-generation-uk/
