DOMINION ENERGY, INC Debt Disclosure

The Companies use short-term debt to fund working capital requirements and as a bridge to long-term debt financings. The levels of borrowing may vary significantly during the course of the year, depending upon the timing and amount of cash requirements not satisfied by cash from operations. In addition, Dominion Energy utilizes cash and letters of credit to fund collateral requirements. Collateral requirements are impacted by capital

projects, commodity prices, hedging levels, Dominion Energy’s credit ratings and the credit quality of its counterparties.

Dominion Energy

Dominion Energy’s short-term financing is primarily supported by its joint revolving credit facility. In April 2025, Dominion Energy amended its joint revolving credit facility to, among other things, increase the facility limit from $6.0 billion to $7.0 billion, increase the letters of credit support from $2.0 billion to $3.0 billion and extend the maturity date from June 2026 to April 2030. The key financial covenants in the facility are unchanged except for a technical clarification to the calculation of equity utilized in the total debt to total capital ratio.

DESC’s short-term financing is supported through its access as a co-borrower to the joint revolving credit facility discussed above with the Companies. At December 31, 2025, the sub-limit for DESC was $900 million.

In March 2025, FERC granted DESC authority through March 2027 to issue short-term indebtedness (pursuant to Section 204 of the Federal Power Act) in amounts not to exceed $1.8 billion outstanding with maturity dates of one year or less. In addition, in March 2025, FERC granted GENCO authority through March 2027 to issue short-term indebtedness not to exceed $300 million outstanding with maturity dates of one year or less.

In addition to the credit facilities mentioned above, Dominion Energy’s credit facilities and agreements also consist of the following:

Dominion Energy has an effective shelf registration statement with the SEC for the sale of up to $3.0 billion of variable denomination floating rate demand notes, called Dominion Energy Reliability InvestmentSM. The registration limits the principal amount that may be outstanding at any one time to $1.0 billion. The notes are offered on a continuous basis and bear interest at a floating rate per annum determined by the Dominion Energy Reliability Investment Committee, or its designee, on a weekly basis. The notes have no stated maturity date, are non-transferable and may be redeemed in whole or in part by Dominion Energy or at the investor’s option at any time. At December 31, 2025 and 2024, Dominion Energy’s Consolidated Balance Sheets include $422 million and $439 million, respectively, presented within short-term debt with weighted-average interest rates of 3.75% and 4.50%, respectively. The proceeds are used for general corporate purposes and to repay debt.

In February 2026, Dominion Energy entered into an approximately $1.3 billion 364-day term loan facility which bears

interest at a variable rate, contains a maximum allowed total debt to total capital ratio consistent with such allowed ratio under Dominion Energy’s joint revolving credit facility and will mature in February 2027, with the proceeds to be used to repay existing debt and for other general corporate purposes. In February 2026, Dominion Energy borrowed an initial $500 million with the proceeds used for general corporate purposes. Subsequently in February 2026, Dominion Energy provided notice to borrow an additional $300 million under this facility.

In January 2023, Dominion Energy entered into a $2.5 billion 364-day term loan facility which bore interest at a variable rate and was scheduled to mature in January 2024 with the proceeds to be used to repay existing long-term debt and short-term debt upon maturity and for other general corporate purposes. Concurrently, Dominion Energy borrowed an initial $1.0 billion with the proceeds used to repay long-term debt. In February and March 2023, Dominion Energy borrowed $500 million and $1.0 billion, respectively, with the proceeds used for general corporate purposes and to repay long-term debt. In January 2024, the facility was amended to mature July 2024. The amended agreement contained certain mandatory early repayment provisions, including that any after-tax proceeds in connection with the East Ohio, Questar Gas and PSNC Transactions be applied to any outstanding borrowings under the facility. In March 2024, Dominion Energy repaid the full $2.5 billion outstanding using after-tax proceeds received in connection with the East Ohio Transaction. The maximum allowed total debt to total capital ratio under the facility was consistent with such allowed ratio under Dominion Energy’s joint revolving credit facility.

In July 2023, Dominion Energy entered into two $600 million 364-day term loan facilities which bore interest at a variable rate and were scheduled to mature in July 2024 with the proceeds to be used to repay existing long-term debt and short-term debt upon maturity and for other general corporate purposes. Subsequently in July 2023, Dominion Energy borrowed an initial $750 million in the aggregate under these facilities with the proceeds used to repay short-term debt and for general corporate purposes. Dominion Energy was permitted to make up to three additional borrowings under each agreement through November 2023, at which point any unused capacity would cease to be available to Dominion Energy. The agreements contained certain mandatory early repayment provisions, including that any after-tax proceeds in connection with a sale of Dominion Energy’s noncontrolling interest in Cove Point, following the repayment of DECP Holding’s term loan secured by its noncontrolling interest in Cove Point, be applied to any outstanding borrowings under the facilities. In September 2023, Dominion Energy repaid the $750 million borrowing with after-tax proceeds from the sale of Dominion Energy’s noncontrolling interest in Cove Point, as discussed in Note 9. Subsequently in September 2023, Dominion Energy borrowed $225 million in the aggregate under these facilities with the proceeds used to repay short-term debt and for general corporate purposes. In October 2023, Dominion Energy repaid the $225 million borrowing and terminated the facilities along with any remaining unused commitments.

In October 2023, Dominion Energy entered into a $2.25 billion 364-day term loan facility which bore interest at a variable rate with the proceeds to be used for general corporate purposes, which was scheduled to mature in October 2024. Concurrently, Dominion Energy borrowed an initial $1.0 billion with the proceeds used for general corporate purposes, including to repay short-term and long-term debt. In November and December 2023, Dominion Energy borrowed $500 million and $750 million, respectively, with the proceeds used for general corporate purposes. Dominion Energy also had the ability through August 2024 to request an increase in the amount of this facility by up to an additional $500 million. The agreement contained certain mandatory early repayment provisions, including that any after-tax proceeds in connection with the East Ohio, PSNC and Questar Gas Transactions, following the repayment of the 364-day term loan facility entered into in January 2023, be applied to any outstanding borrowings under this facility. In March 2024, Dominion Energy repaid $1.8 billion using after-tax proceeds received in connection with the East Ohio Transaction. Subsequently in March 2024, Dominion Energy requested and received a $500 million increase to the amount of the facility and concurrently borrowed $500 million with the proceeds used for general corporate purposes. In May 2024, Dominion Energy repaid the full $976 million outstanding under the facility, using after-tax proceeds received in connection with the Questar Gas Transaction. The maximum allowed total debt to total capital ratio under this facility was consistent with such allowed ratio under Dominion Energy’s joint revolving credit facility.

Virginia Power

Virginia Power’s short-term financing is supported through its access as co-borrower to Dominion Energy’s $7.0 billion joint revolving credit facility, as most recently amended in April 2025.

In addition to the credit facility mentioned above, Virginia Power’s credit facilities and agreements also consist of the following: