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) September 10, 2026

Modine Manufacturing Company

(Exact Name of Registrant as Specified in Its Charter)

Wisconsin

(State or Other Jurisdiction of Incorporation)

001-01373 39-0482000
(Commission
File Number)
(IRS Employer
Identification No.)
1500 DeKoven Avenue, Racine, Wisconsin 53403
(Address of Principal Executive Offices) (Zip Code)

(262) 636-1200

(Registrant’s Telephone Number, Including Area Code)

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 (see General Instruction A.2. below):

x 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 Exchange Act:

Title of Each Class Trading
Symbol
Name of Each exchange
on Which Registered
Common stock, par value $0.625 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. ¨

Item 8.01Other Events.

On September 10, 2026, Modine Manufacturing Company (the “Company”) issued a press release announcing that it will become Modexus Solutions after completing the spinoff of its Performance Technologies business and merger with Gentherm, subject to the Company shareholder approval of an amendment to the Company’s Articles of Incorporation to effect the change in the Company’s name. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit
Number
Description
99.1 Press release issued September 10, 2026
104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

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
(Registrant)
By: /s/ Erin J. Roth
Erin J. Roth
Vice President, General Counsel and Chief Compliance Officer

Date: September 10, 2026