道明尼资源美股招股说明书(2026-06-04版)

Dominion Energy, Inc. $825,000,000 2026 Series A 5.35% Senior Notes due 2036 The Senior Notes will bear interest at 5.35% per year and will mature on June 15, 2036. We will pay interest on the Senior Notes on June 15 andDecember15 of each year, beginning December15, 2026. We may redeem all or any of the Senior Notes at any time at the redemption prices described in this prospectus supplement, plus accrued andunpaid interest. We may also redeem the Senior Notes, in whole but not in part, at a redemption price equal to 101% of the principal amount thereof if a TaxCredit Event (as defined herein) occurs. See DESCRIPTION OF THE SENIOR NOTES—Tax Credit Event Redemption. No application is being made or is intended to be made for the listing or trading of the Senior Notes on any securities exchange or trading facilityor to include them in any automated quotation system. (1)Plus accrued interest from June5, 2026, if settlement occurs after that date. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities orpassed upon the adequacy or accuracy of this prospectus supplement or the accompanying base prospectus. Any representation to the contraryis a criminal offense. This prospectus supplement and the accompanying base prospectus are not intended to constitute an offer to, and the Senior Notes shouldnot be purchased, held or otherwise acquired by, a “specified foreign entity” as defined in Section7701(a)(51)(B) of the Internal Revenue Codeof 1986, as amended (an SFE). By purchasing Senior Notes, any investor in the Senior Notes (including all affiliated entities that participate insuch purchase) will be deemed to represent and warrant to us that it is not, and will not be, for its taxable year that includes the date of theoriginal issuance of the Senior Notes, an SFE. The Senior Notes will be ready for delivery in book-entry form only through The Depository Trust Company and its direct participants, includingEuroclear Bank S.A./N.V. (Euroclear) and Clearstream Banking S.A. (Clearstream), on or about June5, 2026. Joint Book-Running Managers DeutscheBankSecuritiesBNYCapitalMarkets Citigroup USBancorp The date of this prospectus supplement is June3, 2026. ABOUT THIS PROSPECTUS SUPPLEMENT This document is in two parts. The first part is the prospectus supplement, which describes the specific terms of the Senior Notes and certain othermatters relating to us and our financial condition. The second part, the accompanying base prospectus, gives more general information about securitieswe may offer from time to time, some of which does not apply to the Senior Notes we are offering at this time. Generally, when we refer to theprospectus, we are referring to both parts of this document combined. To the extent any information contained or incorporated in the prospectussupplement differs from the information contained or incorporated in the accompanying base prospectus, you should only rely on the informationcontained or incorporated in the prospectus supplement. This document contains and refers you to information that you should consider when making your investment decision, including other offeringmaterials filed by us with the Securities and Exchange Commission (SEC). We have not authorized anyone, and we have not authorized the underwritersto authorize anyone, to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely onit. This document may only be used where it is legal to sell these securities. The information which appears in this document and which is incorporatedby reference in this document may only be accurate as of the date of this prospectus supplement or the date of the document in which incorporatedinformation appears. Our business, financial condition, results of operations and prospects may have changed since the date of such information. TABLE OF CONTENTS Prospectus Supplement About This Prospectus SupplementWhere You Can Find More InformationForward-Looking InformationProspectus Supplement SummaryRisk FactorsUse of ProceedsDescription of the Senior NotesBook-Entry Procedures and SettlementMaterial U.S. Federal Income Tax ConsiderationsUnderwriting (Conflicts of Interest)Legal Matters Base Prospectus Risk FactorsAbout This ProspectusWhere You Can Find More InformationSafe Harbor and Cautionary StatementsDominion EnergyUse of ProceedsDescription of Debt SecuritiesAdditional Terms of the Senior Debt Securities Additional Terms of the Junior Subordinated DebenturesAdditional Terms of the Junior Subordinated NotesDescription of Capital StockDescription of Stock Purchase Contracts and Stock Purchase UnitsPlan of DistributionLegal MattersExperts WHERE YOU CAN FIND MORE INFORMATION We file annual, quarterly and current reports, proxy statements and other information with the SEC. Our file number with the SEC is 001-08489.Our SEC filings are availabl