安特吉美股招股说明书(2026-08-05版)

$1,500,000,000$750,000,000 Junior Subordinated Debentures due December15, 2056 (Series 2026A) (non-call 10)$750,000,000 Junior Subordinated Debentures due December15, 2058 (Series 2026B) (non-call 7) We are offering $750,000,000 of our Junior Subordinated Debentures due December15, 2056 (Series 2026A) (the “Series 2026A Junior Subordinated Debentures”) and $750,000,000of our Junior Subordinated Debentures due December15, 2058 (Series 2026B) (the “Series 2026B Junior Subordinated Debentures” and together with the Series 2026A Junior SubordinatedDebentures, the “Junior Subordinated Debentures”). The Series 2026A Junior Subordinated Debentures will bear interest (i)from and including the date of original issuance to, but notincluding, December15, 2036 at an annual rate of 6.500% and (ii)from and including December15, 2036 during each Interest Reset Period (as defined herein) at an annual rate equal to theFive-Year Treasury Rate (as defined herein) as of the most recent Reset Interest Determination Date (as defined herein) plus 1.877%; provided, that the interest rate during any Interest ResetPeriod for the Series 2026A Junior Subordinated Debentures will not reset below 6.500% (which equals the initial interest rate on the Series 2026A Junior Subordinated Debentures). TheSeries2026B Junior Subordinated Debentures will bear interest (i) from and including the date of original issuance to, but not including, December15, 2033 at an annual rate of 6.500% and(ii) from and including December15, 2033 during each Interest Reset Period at an annual rate equal to the Five-Year Treasury Rate as of the most recent Reset Interest Determination Dateplus 2.030%; provided, that the interest rate during any Interest Reset Period for the Series 2026B Junior Subordinated Debentures will not reset below 6.500% (which equals the initialinterest rate on the Series 2026B Junior Subordinated Debentures). Interest on the Junior Subordinated Debentures will be payable semi-annually in arrears on June15 and December15 of each year. The first interest payment on the JuniorSubordinated Debentures will be made on December15, 2026. We may redeem some or all of the Junior Subordinated Debentures of each series, at our option, at the times and pricesdescribed in this prospectus supplement. The Junior Subordinated Debentures will be issued only in registered form in minimum denominations of $2,000 and integral multiples of $1,000 inexcess thereof. The Junior Subordinated Debentures will be our direct unsecured obligations and will rank junior and be subordinated in right of payment and upon liquidation to our existingand future Senior Indebtedness (as defined herein) and equally in right of payment with any Pari Passu Securities (as defined herein). We may defer interest payments on the Junior Subordinated Debentures of a particular series on one or more occasions for up to 10 consecutive years per deferral period as describedin this prospectus supplement. Deferred interest payments will accrue additional interest at a rate equal to the interest rate then applicable to the Junior Subordinated Debentures of such series,to the extent permitted by applicable law. We do not intend to apply to list the Junior Subordinated Debentures of either series on a securities exchange. Investing in the Junior Subordinated Debentures involves risks. See “Risk Factors” beginning on page S-7 of this prospectus supplement to read aboutfactors you should consider before buying the Junior Subordinated Debentures. 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. (1)The price to public will also include any interest that has accrued on the Junior Subordinated Debentures since their issue date if delivered after that date. This prospectus supplement and the accompanying prospectus are not intended to constitute an offer to, and the Junior Subordinated Debentures should not be purchased,held or otherwise acquired by, a “specified foreign entity” as defined in Section7701(a)(51)(B) of the Internal Revenue Code of 1986, as amended (an “SFE”). Each purchaser ofthe Junior Subordinated Debentures, by accepting such Junior Subordinated Debentures, will be deemed to have represented, warranted, and agreed that it is not an SFE. The underwriters expect to deliver the Junior Subordinated Debentures to purchasers on or about August7, 2026 through the book-entry facilities of The Depository Trust Company inNew York, New York for the accounts of its participants, including Euroclear Bank SA/NV, as operator of the Euroclear System, and Clearstream Banking, S.A., Luxembourg. J.P.Morgan BNPPARIBAS MorganStanley MUFG BofA Securities USBancorp Table of Contents This prospectus supplement, the accompanying prospectus and any related fr