Company: HUM
Filing Date: 2025-03-26
Form Type: 424B5
Source: 0001628280-25-014916
Chunk: 2

Company: HUMANA INC
Filing Date: 2025-03-26
Form: 424B5
Chunk 2
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 expressly agree otherwise. Accordingly, purchasers who wish to trade the additional 20 notes on any date prior to the business day before delivery will be required, by virtue of the fact that the additional 20 notes initially will settle in business days (T+ ), to specify alternative settlement arrangements at the time of any such trade to prevent a failed settlement. See “Underwriting.”

#### Joint Book-Running Managers
| J.P. Morgan |     | Barclays |

#### , 2025
Table of Content s

You should rely only on the information contained or incorporated by reference in this prospectus supplement, the accompanying prospectus and any related free writing prospectus prepared by us. We and the underwriters have not authorized any other person to provide you with different information and we take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. If anyone provides you with different or inconsistent information, you should not rely on it. We and the underwriters are not making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted.

You should not assume that the information contained in this prospectus supplement, the accompanying prospectus, any related free writing prospectus prepared by us, or the documents incorporated by reference in this prospectus supplement or the accompanying prospectus is accurate as of any date other than the date on the front cover of this prospectus supplement, the accompanying prospectus, any free writing prospectus prepared by us or the documents incorporated by reference.

### TABLE OF CONTENTS

#### Prospectus Supplement
|                                                  |     | Page |
| About This Prospectus Supplement                 |     | S-i  |
| Forward-Looking Statements                       |     | S-i  |
| Incorporation of Certain Documents by Reference  |     | S-ii |
| Summary                                          |     | S-1  |
| The Offering                                     |     | S-2  |
| Risk Factors                                     |     | S-4  |
| Capitalization                                   |     | S-6  |
| Use of Proceeds                                  |     | S-7  |
| Description of the Notes                         |     | S-8  |
| Certain United States Federal Tax Considerations |     | S-20 |
| Underwriting                                     |     | S-27 |
| Legal Matters                                    |     | S-33 |
| Experts                                          |     | S-33 |

#### Prospectus
| About This Prospectus                                                                                                      |     |  1 |
| Risk Factors