Exhibit 99 NEWS RELEASE May 2, 2024 Dominion Energy Announces First-Quarter 2024 Earnings • First-quarter 2024 GAAP net income of $0.78 per share; operating earnings (non-GAAP) of$0.55 per share • Company affirms all financial guidance provided at its March 1, 2024 investor meeting including guidance related to earnings, credit, and dividend RICHMOND, Va. – Dominion Energy, Inc. (NYSE: D), today announced unaudited net income determined in accordance with Generally Accepted Accounting Principles (GAAP, or ...