System Energy Resources 8-KRegulation FD Disclosure

In this current report on Form 8-K, and from time to time, Entergy Corporation, Entergy Arkansas and System Energy make certain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements include, among other things, statements regarding Entergy’s current financial and operational outlooks; expected impacts to credit metrics and ratings; and other statements of Entergy’s, Entergy Arkansas’ or System Energy’s plans, beliefs, or expectations included in this report. Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this report. Except to the extent required by the federal securities laws, neither Entergy nor Entergy Arkansas nor System Energy undertakes any obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise.

Forward-looking statements are subject to a number of risks, uncertainties, and other factors that could cause actual results to differ materially from those expressed or implied in such forward-looking statements, including (a) those factors discussed elsewhere in this Current Report on Form 8-K and in Entergy’s most recent Annual Report on Form 10-K, any of its subsequently filed Quarterly Reports on Form 10-Q, and any of its other subsequently filed reports and filings made under the Securities Exchange Act of 1934; (b) uncertainties associated with (1) Entergy’s rate proceedings, formula rate plans, and other cost recovery mechanisms, including the risk that costs may not be recoverable to the extent or on the timeline anticipated by the utilities and (2) implementation of the ratemaking effects of changes in law; (c) risks associated with operating nuclear facilities, including plant relicensing, operating, and regulatory costs and risks; (d) legislative and regulatory actions and risks and uncertainties associated with claims or litigation by or against Entergy and its subsidiaries; and (e) effects on Entergy or its customers of (1) changes in federal, state, or local laws and regulations and other governmental actions or policies, including changes in monetary, fiscal, tax, environmental, or energy policies; (2) the effects of changes in commodity markets, capital markets, or economic conditions; and (3) the effects of technological change, including the costs, pace of development, and commercialization of new and emerging technologies.

On October 27, 2023, System Energy, Entergy Arkansas, and additional named Entergy subsidiaries (“Entergy Parties”) involved in multiple docketed proceedings pending before the Federal Energy Regulatory Commission (“FERC”) reached a settlement in principle with the Arkansas Public Service Commission (“Arkansas Commission”) to globally resolve all their actual and potential claims in those dockets and with System Energy’s past implementation of the Unit Power Sales Agreement. The settlement in principle also covers the amended and supplemental complaint filed at the FERC in Docket No. EL24-5 on October 18, 2023. The Unit Power Sales Agreement is a FERC-jurisdictional formula rate tariff for sales of energy and capacity from System Energy’s owned and leased share of Grand Gulf Nuclear Station to four Entergy Operating Companies: Entergy Arkansas, Entergy Mississippi, LLC (“Entergy Mississippi”), Entergy Louisiana, LLC (“Entergy Louisiana”), and Entergy New Orleans, LLC (“Entergy New Orleans”). System Energy previously settled with the Mississippi Public Service

Commission, which has 39.95% output of Grand Gulf. The settlements with both the Arkansas Commission and the Mississippi Public Service Commission represent almost 65% of the output of Grand Gulf. Thus, with the settlement in principle, System Energy has reduced its overall refund exposure to only 35% remaining.

System Energy, Entergy Arkansas, Entergy Parties, and the Arkansas Commission intend to file the settlement agreement and supporting materials with the FERC shortly. Beginning with the November 2023 service month, the settlement in principle also provides for Entergy Arkansas’s bills from System Energy to be adjusted to reflect an authorized rate of return on equity of 9.65%, and a capital structure not to exceed 52% equity, consistent with the FERC’s previously approved authorized return on equity and capital structure for Entergy Mississippi.

If FERC approves the filed settlement in accordance with its terms, then it will become binding upon the Entergy Parties and the Arkansas Commission.

System Energy has previously recorded a provision and associated liability of $37 million for elements of the applicable litigation. In June 2022, System Energy recorded a pre-tax regulatory charge of approximately $551 million (approximately $413 million after tax), increasing the regulatory liability to $588 million, which consists of $235 million for the settlement with the Mississippi Commission and $353 million for potential future refunds to Entergy Arkansas, Entergy New Orleans and Entergy Louisiana. The $142 million refund for Entergy Arkansas is covered within the $353 million.