Material Event (Form 8-K)

On September 29, 2025, Dominion Energy, Inc. (the Company) entered into an underwriting agreement (the Underwriting Agreement) with BofA Securities, Inc., J.P. Morgan Securities LLC and Truist Securities, Inc., as Representatives for the underwriters named in the Underwriting Agreement, for the sale of $625,000,000 aggregate principal amount of the Company's 2025 Series A Junior Subordinated Notes due 2056 (the New Series A JSNs) and $625,000,000 aggregate principal amount of the Company's 2025 Series B Junior Subordinated Notes due 2056 (the New Series B JSNs). The New Series A JSNs constitute a further issuance of, and will form a single series with, the Company's currently outstanding $825,000,000 aggregate principal amount of 2025 Series A Junior Subordinated Notes due 2056 issued on August 6, 2025. The New Series B JSNs constitute a further issuance of, and will form a single series with, the Company's currently outstanding $700,000,000 aggregate principal amount of 2025 Series B Junior Subordinated Notes due 2056 issued on August 6, 2025.

The New Series A JSNs and the New 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 February 21, 2023 (File No. 333-269879).A copy of the Underwriting Agreement, including exhibits thereto, is filed as Exhibit 1.1 to this Form 8-K.

The New Series A JSNs and the New Series B JSNs will be issued under the Nineteenth Supplemental Indenture and Twentieth 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.