LII: Financial results

Item 2.02 Results of Operations and Financial Condition.* On July 29, 2026, Lennox International Inc. (the “Company”) issued a press release announcing its financial results for the second quarter of 2026. A copy of the press release is furnished as Exhibit 99.1 to this report. Item 9.01 Financial Statements and Exhibits. (d) Exhibits. EXHIBIT NUMBER DESCRIPTION 99.1 Press release dated July 29, 2026 (furnished herewith). * 104 Inline XBRL for the cover page of this Current Report on Form 8-K. * The information contained in Item 2.02 and Exhibit 99.1 of this report is being “furnished” with the Securities and Exchange Commission and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities under that section. Furthermore, such information shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, unless specifically identified as being incorporated therein by reference. 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. LENNOX INTERNATIONAL INC. Date: July 29, 2026 By: /s/ Jennifer S. Perry Name: Jennifer S. Perry Title: Assistant Secretary