Company Update

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549     FORM  8-K   CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934   Date of Report (Date of earliest event reported): November 21, 2025     EVERSOURCE ENERGY (Exact name of registrant as specified in its charter)   Massachusetts   001-05324   04-2147929 (State or other jurisdiction of incorporation)   (Commission File Number)   (I.R.S. Employer Identification No.)   300 Cadwell Drive, Springfield , Massachusetts , 01104 (Address of principal executive offices, including zip code)   ( 800 ) 286-5000 Registrant’s telephone number, including area code   Not Applicable (Former name or former address, if changed since last report)   Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):   ¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)   ¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)   ¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))   ¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))   Securities registered pursuant to Section 12(b) of the Act:   Title of each class Trading Symbol Name of each exchange on which registered Common Shares, $5.00 par value per share ES New York Stock Exchange   Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of the chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of the chapter).   Emerging growth company ¨   If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨                Section 8 - Other Events   Item 8.01   Other Events.   On November 21, 2025, Eversource Energy issued a news release on the Connecticut Public Utilities Regulatory Authority’s decision to reject the proposed sale of the Aquarion Water Company to the South Central Connecticut Regional Water Authority. A copy of the news release is attached as Exhibit 99.1 and is incorporated herein by reference hereto.   Section 9 - Financial Statements and Exhibits   Item 9.01   Financial Statements and Exhibits.   (d) Exhibits.   Exhibit Number   Description 99.1   News Release of Eversource Energy, dated November 21, 2025. 104   Cover Page Interactive Data File (embedded within the Inline XBRL document).             SIGNATURE   Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused the report to be signed on its behalf by the undersigned hereunto duly authorized.     EVERSOURCE ENERGY   (Registrant)     November 24, 2025 By: /s/ Jay S. Buth     Jay S. Buth     Vice President, Controller and Chief Accounting Officer