能源方案美股招股说明书(2025-10-16版)

4.45% Senior Notes, SeriesHH, Due 2030 We are offering $600,000,000 of our Senior Notes, SeriesHH, Due 2030 (the “Notes”). The Notes willbear interest at the rate of 4.45% per year. The Notes will mature on December15, 2030. We will payinterest on the Notes on June15 and December15 of each year, beginning on June15, 2026 and ending onthe maturity date of the Notes. We may redeem some or all of the Notes at our option in the manner and atthe redemption prices described under “Description of the Notes — Optional Redemption” beginning onpage S-14 of this prospectus supplement. The Notes are not entitled to the benefit of any sinking fund. The Notes will be unsecured and unsubordinated obligations and will rank equally in right of paymentwith all of our other unsecured and unsubordinated indebtedness from time to time outstanding. The Notes are a new issue of securities with no established trading market. The Notes will not be listedon any securities exchange or on any automated dealer quotation system. Investing in the Notes involves risks. See “Risk Factors” on pageS-8of this prospectus supplement. (1)Plus accrued interest, if any, from the date of original issuance. The Securities and Exchange Commission and state securities regulators have not approved ordisapproved these securities or determined if this prospectus supplement or the accompanying prospectus istruthful or complete. Any representation to the contrary is a criminal offense. The underwriters expect to deliver the Notes in book-entry form through the facilities of TheDepository Trust Company in New York, New York for the accounts of its participants, includingClearstream Banking, S.A. and Euroclear Bank SA/NV, on or about October 17, 2025. Joint Book-Running Managers Morgan Stanley US Bancorp Ramirez & Co., Inc. Siebert Williams Shank The date of this prospectus supplement is October 15, 2025. No dealer, salesperson or other person is authorized to give any information or to represent anythingnot contained in this prospectus supplement or the accompanying prospectus or any free writing prospectusauthorized by us. This prospectus supplement and the accompanying prospectus are an offer to sell only theNotes, but only under circumstances and in jurisdictions where it is lawful to do so. The informationcontained or incorporated by reference in this prospectus supplement and the accompanying prospectus isaccurate only as of their respective dates. Our business, financial condition, results of operations andprospects may have changed since those dates. TABLE OF CONTENTS Prospectus SupplementPageABOUT THIS PROSPECTUS SUPPLEMENTS-1DOCUMENTS INCORPORATED BY REFERENCES-2SAFE HARBOR STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORMACT OF 1995S-3PROSPECTUS SUPPLEMENT SUMMARYS-5EVERSOURCE ENERGYS-5THE OFFERINGS-6RISK FACTORSS-8USE OF PROCEEDSS-9SELECTED HISTORICAL CONSOLIDATED FINANCIAL INFORMATIONS-10CAPITALIZATIONS-11DESCRIPTION OF THE NOTESS-12CERTAIN UNITED STATES FEDERAL INCOME TAX CONSEQUENCESS-18UNDERWRITINGS-21LEGAL OPINIONSS-27EXPERTSS-27ProspectusABOUT THIS PROSPECTUS1WHERE YOU CAN FIND MORE INFORMATION1SAFE HARBOR STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORMACT OF 19953RISK FACTORS5THE REGISTRANTS6USE OF PROCEEDS8GENERAL DESCRIPTION OF THE SECURITIES WE MAY SELL9GLOBAL SECURITIES29PLAN OF DISTRIBUTION33LEGAL OPINIONS34EXPERTS34 ABOUT THIS PROSPECTUS SUPPLEMENT This document is in two parts. The first part is this prospectus supplement, which describes the specificterms of the Notes and also adds to and updates information contained in the accompanying prospectus andthe documents relating to us incorporated by reference into this prospectus supplement and theaccompanying prospectus. The second part is the accompanying prospectus, which contains a generaldescription of our unsecured senior notes (the “Senior Notes”) of which the Notes are a series. To the extentthere is a conflict between the information contained or incorporated by reference in this prospectussupplement, on the one hand, and the information contained in the accompanying prospectus, on the otherhand, the information contained or incorporated by reference in this prospectus supplement shall control. This prospectus supplement and the accompanying prospectus are part of a registration statement thatwe filed jointly with three of our operating subsidiaries with the Securities and Exchange Commission (the“Commission”) using a “shelf” registration process as a “well-known seasoned issuer.” Under the shelfregistration process, we may, from time to time, issue and sell to the public the securities described in theaccompanying prospectus, including the Senior Notes, up to an indeterminate amount, of which this offeringis a part. In this prospectus supplement, we provide you with specific information about the terms of theNotes and this offering. In this prospectus supplement, “Eversource,” “the Company,” “we,” “our,” and “us” refer toEversource Energy,