Company Update

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 12, 2025 BRUNSWICK CORPORATION   (Exact Name of Registrant Specified in Charter) Delaware   001-01043   36-0848180 (State or Other Jurisdiction of Incorporation)   (Commission File Number)   (I.R.S. Employer Identification No.) 26125 N. Riverwoods Blvd., Suite 500 Mettawa , Illinois     60045-3420 (Address of Principal Executive Offices)   (Zip Code) Registrant’s telephone number, including area code: ( 847 ) 735-4700 N/A (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: ☐  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(s)   Name of Each Exchange on Which Registered Common stock, par value $0.75 per share   BC   New York Stock Exchange         NYSE Texas, Inc. 6.500% Senior Notes due 2048   BC-A   New York Stock Exchange 6.375% Senior Notes due 2049   BC-C   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 this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this 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. ☐     Item 8.01.  Other Events. On November 12, 2025, Brunswick Corporation (the “Company”) issued a press release announcing that it has commenced a tender offer to purchase for cash an aggregate principal amount of up to $50 million (the “Tender Cap”) of its outstanding $300 million 5.100% Senior Notes due 2052. The tender offer is being made exclusively pursuant to an offer to purchase, dated November 12, 2025, which sets forth the terms and conditions of the tender offer. The press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated in this Item 8.01 by reference. Item 9.01. Financial Statements and Exhibits. (d)           Exhibits: Exhibit No.   Description of Exhibit         99.1 Press release of the Company, issued November 12, 2025. 104   Cover Page Interactive Data File (embedded within the Inline XBL document).   SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Company has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.   BRUNSWICK CORPORATION             Dated: November 12, 2025 By: /s/ Ryan M. Gwillim       Name: Ryan M. Gwillim       Title: Executive Vice President and Chief         Financial and Strategy Officer