哈门那美股招股说明书(2026-03-05版)

Prospectus Supplement, 2026(To Prospectus dated March 7, 2024) Humana Inc.% Fixed-to-Fixed Rate Junior Subordinated Notes due 2056 This is an offering by Humana Inc. (“we”, “us” or “our”) of an aggregate of $of% Fixed-to-FixedRate Junior Subordinated Notes due 2056, which we referto as the “junior subordinated notes.” The junior subordinated notes will bear interest (i)from, and including, the original issuance date to, but excluding,, 2031 (“First Reset Date”) at a rate of%per year and (ii)from, and including, the First Reset Date, during each Reset Period (as defined herein), at a rate per year equal to the Five-year U.S. Treasury Rate (asdefined herein) as of the most recent Reset Interest Determination Date (as defined herein) plus a spread of%, to be reset on each Reset Date (as defined herein);provided, that the interest rate during any Reset Period will not reset below% (which equals the initial interest rate on the junior subordinated notes). Subject to our right to defer interest payments as described below, we will pay interest on the junior subordinated notes semi-annually in arrears onandof each year, beginning on, 2026. The junior subordinated notes will be issued in registered form and in minimum denominations of $2,000 andintegral multiples of $1,000 in excess thereof. The junior subordinated notes will mature on, 2056. So long as no event of default (as defined in this prospectus supplement) with respect to the junior subordinated notes has occurred and is continuing, we may, at ouroption, defer interest payments on the junior subordinated notes on one or more occasions for up to 10 consecutive years per deferral period as described in thisprospectus supplement. Deferred interest payments with respect to the junior subordinated notes will accumulate additional interest at a rate equal to the interest ratethen applicable to the junior subordinated notes, compounded on each interest payment date, to the extent permitted by law. We may redeem the junior subordinated notes at our option at the times and at the redemption prices described in this prospectus supplement. The junior subordinatednotes will be our general unsecured subordinated obligations and will rank junior in right of payment, to the extent and in the manner set forth in the indenturegoverning the junior subordinated notes, to all senior indebtedness (as defined herein). The junior subordinated notes will be our unsecured obligations and will be effectively junior to any of our future secured indebtedness to the extent of the assetssecuring that indebtedness, and will be structurally subordinated to any indebtedness and other liabilities of our subsidiaries. The junior subordinated notes is a new issue of securities with no established trading market. No application is being or is intended to be made for the listing or tradingof the junior subordinated notes on any securities exchange or trading facility or to include the junior subordinated notes in any automated quotation system. Investing in the junior subordinated notes involves risks that are described in the “Risk Factors” sections beginning on pageS-6of this prospectus supplement and inother documents incorporated by reference in this prospectus supplement and the accompanying prospectus. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectussupplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense. Public Offering PriceUnderwriting DiscountProceeds to Humana Inc. (before expenses) (1)Plus accrued interest, if any, from, 2026, if settlement occurs after that date. The junior subordinated notes will not be listed on any securities exchange. Currently, there are no public markets for the junior subordinated notes.It is expected that delivery of the junior subordinated notes will be made to purchasers on or about, 2026, which is thebusiness day following the date of thisprospectus supplement (such settlement cycle referred to as T+), through The Depository Trust Company, including its participants Clearstream Banking S.A. andEuroclear Bank SA/NV. Under Rule 15c6-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), trades in the secondary market generally arerequired to settle in one business day, unless the parties to such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the junior subordinated noteson any date prior to the business day before delivery will be required, by virtue of the fact that the junior subordinated notes initially will settle inbusiness 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 Goldman Sachs & Co.LLC TruistSecurities You should rely only on the information contained or incorporated by reference