Investor Presentaiton

Regulated electric sales growth LTM' Q1'23 YoY weather normal sales growth? Residential Commerical Industrial Govt/Other Total 1.4% 11.4% 4.9% 1.2% Regulated electric sales trends Robust commercial load growth driven by Data Centers Residential segment growth driven by attractive customer growth across our Virginia and South Carolina service areas -2.5% LTM weather normal sales growth² 1.0% LTM Q1'22 4.9% LTM Q1'23 Dominion LTM refers to the timeframe of the immediately preceding 12 months as noted 2 DEV and DESC combined Energy® YTD YOY customer growth 1.0% 1.3% DEV DESC 18

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