Results of Operations

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC  20549 FORM  8-K/A CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported):  October 28, 2025 Modine Manufacturing Company (Exact name of registrant as specified in its charter) Wisconsin 001-01373 39-0482000 (State or other jurisdiction of incorporation) (Commission File Number) (I.R.S. Employer Identification Number) ​ ​ 1500 DeKoven Avenue ,  Racine ,  Wisconsin   53403 (Address of principal executive offices)   (Zip Code) ​ ​ Registrant’s telephone number, including area code:   ( 262 )  636-1200       (Former name or former address, if changed since last report.)   N/A ​ Check the appropriate box below if the Form 8-K/A 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, $0.625 par value ​ MOD ​ 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. ☐ ​ ​ ​ Explanatory Note This purpose of this amendment to the Form 8-K furnished by Modine Manufacturing Company on October 28, 2025 (the “Form 8-K”) is to provide an updated version of the presentation attached as Exhibit 99.2, which includes a correction to the information provided on page 4 of the presentation.  There are no other changes to Exhibit 99.2, and no changes to the Form 8-K or Exhibit 99.1 furnished therewith. The unchanged Exhibit 99.1 is attached to this amendment solely for the convenience of the reader. ​ Information to be Included in the Report Item 2.02 Results of Operations and Financial Condition On October 28, 2025, Modine Manufacturing Company (the “Company”) issued a press release announcing the results of operations and financial condition for the second quarter ended September 30, 2025. ​ During a conference call scheduled to be held at 11:00 a.m. Eastern Time on October 29, 2025, the Company’s President and Chief Executive Officer, Neil D. Brinker, and Executive Vice President, Chief Financial Officer, Michael B. Lucareli, will discuss the Company’s results for the second quarter ended September 30, 2025. ​ Attached to this Current Report on Form 8-K as Exhibit 99.1 and 99.2, respectively, is a copy of the Company’s press release in connection with the announcement and a copy of the presentation that the Company intends to use in connection with its second quarter earnings call. The information in this Item 2.02, including Exhibit 99.1 and 99.2, is furnished pursuant to Item 2.02 and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liabilities of that section, and shall not be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except as shall be expressly set forth by specific reference in such filing. ​ Item 9.01 Financial Statements and Exhibits (d) Exhibits The following exhibits are being furnished herewith: ​ ​ ​ 99.1     Press Release dated October 28, 2025 announcing the results of operations and financial condition for the second quarter ended September 30, 2025. ​ ​ ​ 99.2 ​ October 29, 2025 earnings call presentation. ​ ​ ​ 104 ​ Cover Page Interactive Data File (formatted as Inline XBRL) ​ ​ ​ 2 Signatures Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Modine Manufacturing Company           By:  /s/ Neil D. Brinker   Neil D. Brinker   President and Chief Executive Officer     Date:  October 29, 2025   ​ ​ ​ 3