Company: EAI
Filing Date: 2025-08-06
Form Type: S-3ASR
Source: 0001193125-25-174487
Chunk: 3

Company: ENTERGY ARKANSAS, LLC
Filing Date: 2025-08-06
Form: S-3ASR
Chunk 3
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 York Stock Exchange LLC and NYSE Texas, Inc. and trades under the
symbol “ETR.” Unless otherwise indicated in the applicable prospectus supplement, the other securities described in this prospectus will not be listed on a national securities exchange.

Investing in the securities offered by this prospectus involves risks. See “ Risk Factors” on page 1.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this
prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

We may offer the securities to or through underwriters or
dealers, directly to purchasers or through agents designated from time to time. This prospectus may be used in connection with any offering of securities through any of those methods or other methods described in supplements to this prospectus. The
supplements to this prospectus will describe the terms of any particular plan of distribution, including any underwriting arrangements. The “Plan of Distribution” section beginning on page 19 also provides more information on this topic.

The date of this prospectus is August 6, 2025.

TABLE OF CONTENTS

|                                               |     | Page |    |
| RISK FACTORS                                  |     |      |  1 |
| ABOUT THIS PROSPECTUS                         |     |      |  1 |
| ENTERGY CORPORATION                           |     |      |  1 |
| WHERE YOU CAN FIND MORE INFORMATION           |     |      |  2 |
| USE OF PROCEEDS                               |     |      |  2 |
| DESCRIPTION OF CAPITAL STOCK                  |     |      |  3 |
| DESCRIPTION OF DEPOSITARY SHARES              |     |      |  6 |
| DESCRIPTION OF SENIOR NOTES                   |     |      |  6 |
| DESCRIPTION OF JUNIOR SUBORDINATED DEBENTURES |     |      | 19 |
| SELLING SECURITYHOLDERS                       |     |      | 19 |
| PLAN OF DISTRIBUTION                          |     |      | 19 |
| EXPERTS                                       |     |      | 22 |
| LEGALITY                                      |     |      | 22 |

RISK FACTORS

Investing in the securities described herein involves certain risks. In considering whether to purchase the securities being offered by this prospectus, you
should carefully consider the information we have included or incorporated by reference in this prospectus. In particular, you should carefully consider the information under the headings “