Material Event (Form 8-K)

On June 8, 2026, Dominion Energy, Inc. (the Company) entered into an underwriting agreement (the Underwriting Agreement) with Morgan Stanley & Co. LLC, RBC Capital Markets, LLC, U.S. Bancorp Investments, Inc. and Wells Fargo Securities, LLC, as Representatives for the underwriters named in the Underwriting Agreement, for the sale of $1,000,000,000 aggregate principal amount of the Company's 2026 Series A Junior Subordinated Notes due 2056 (the Series A JSNs) and $500,000,000 aggregate principal amount of the Company's 2026 Series B Junior Subordinated Notes due 2056 (the Series B JSNs). The Series A JSNs and the Series B JSNs are Junior Subordinated Notes that were registered by the Company under Rule 415 under the Securities Act of 1933, as amended, pursuant to a registration statement on Form S-3, which became effective on October 31, 2025 (File No. 333-291189). A copy of the Underwriting Agreement, including exhibits thereto, is filed as Exhibit 1.1 to this Form 8-K.

The Series A JSNs and Series B JSNs will be issued under the Twenty-First Supplemental Indenture and Twenty-Second Supplemental Indenture, respectively, to the Company's June 1, 2006 Subordinated Indenture II, as supplemented and amended by the Third Supplemental and Amending Indenture, dated June 1, 2009. The Twenty-First Supplemental Indenture and the Twenty-Second Supplemental Indenture are filed as Exhibits 4.3 and 4.4, respectively, to this Form 8-K.