Company: HUM
Filing Date: 2025-03-26
Form Type: 424B5
Source: 0001628280-25-014916
Chunk: 0

Company: HUMANA INC
Filing Date: 2025-03-26
Form: 424B5
Chunk 0
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| Filed Pursuant to Rule 424(b)(5) |
| Registration No. 333-277734      |

The information in this preliminary prospectus supplement and the accompanying prospectus is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and they are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

### SUBJECT TO COMPLETION
<div align='center'>PRELIMINARY PROSPECTUS SUPPLEMENT DATED MARCH 26, 2025</div>

#### Prospectus Supplement

#### , 2025
(To Prospectus dated March 7, 2024)

<div align='center'>$</div>

#### Humana Inc.
<div align='center'>$ % Senior Notes due 20</div>

The 20 notes (referred to herein as the additional 20 notes) will bear interest at % per year. Interest on the additional 20 notes will be payable on and of each year, beginning on , 2025. The additional 20 notes will mature on , 20 . Interest on the additional 20 notes will accrue from , 20 . Such accrued interest on the additional 20 notes from , 20 to but excluding the settlement date must be paid by the purchasers of the additional 20 notes offered hereby.

The additional 20 notes offered hereby will be an additional issuance of the % Senior Notes due 20 that we issued in an aggregate principal amount of $ on , 20 (referred to herein as the existing 20 notes and, where the context requires, together with the additional 20 notes, referred to herein as the notes), will be fungible with the existing 20 notes and will be consolidated with and form a single series with the existing 20 notes. The additional 20 notes offered hereby will have terms that are identical to the terms of the existing 20 notes (except for the issuance date and the issuance price) and will have the same ISIN and CUSIP numbers as the existing 20 notes. Immediately after giving effect to the issuance of the additional 20 notes offered hereby and together with the previously issued $ in aggregate principal amount of the existing 20 notes, the outstanding principal amount of the notes will be $ .

At our option, we may redeem the notes, in whole or in part, before their maturity date at the redemption prices described in this prospectus supplement under the caption “Description of the Notes—Optional Redemption