Investor Presentaiton

PSCO | Electric Operating Statistics Years Ended December 31 Electric sales (Millions of kWh) Residential C&I Public authorities and other Total retail PSCO | Investor Fact Book October 2023 | Xcel Energy 2022 9,848 2021 2020 9,996 9,992 18,698 18,690 18,612 244 241 240 28,790 28,927 28,844 4,736 33,526 4,592 33,519 4,456 33,300 Sales for resale Total energy sold Number of customers at end of period Residential 1,337,356 C&I 168,165 1,321,738 167,311 1,305,303 164,932 Public authorities and other 54,436 Total retail 1,559,957 54,454 1,543,503 54,411 1,524,646 Wholesale 50 55 50 1,560,007 1,543,558 1,524,696 Total customers Electric revenues (Millions of Dollars) Residential C&I Public authorities and other Total retail Wholesale Other electric revenues Total electric revenues kWh sales per retail customer Revenue per retail customer Residential revenue per kWh C&l revenue per kWh Total retail revenue per kWh $1,341 $1,245 1,843 1,751 $1,145 1,606 52 53 53 3,236 3,049 2,804 286 250 216 273 114 96 $3,795 $3,413 $3,116 18,456 18,741 18,919 $2,074 $1,975 $1,839 13.62 ¢ 12.45¢ 11.46 ¢ 9.86 9.37 8.63 11.24 10.54 9.72 54 5

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