CNM: Financial results

Item 2.02. Results of Operations and Financial Conditions On September 9, 2026, Core & Main, Inc. (“Core & Main” or the "Company") issued a press release announcing its results of operations for the fiscal second quarter ended August 2, 2026. A copy of the press release is attached hereto as Exhibit 99.1. On September 9, 2026, Core & Main posted to the “Investor Relations” section of its website the presentation that accompanied the earnings conference call. A copy of the investor presentation is attached hereto as Exhibit 99.2. The information provided pursuant to this Item 2.02 and in Exhibit 99.1 and Exhibit 99.2 is being “furnished” herewith and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing made by Core & Main under the Exchange Act or the Securities Act of 1933, as amended, regardless of any general incorporation language in such filings, except as shall be expressly set forth by specific reference in any such filings. Item 9.01. Financial Statements and Exhibits (d) Exhibits Exhibit No. Description 99.1 Earnings release dated September 9 , 2026 - Core & Main Announces Fiscal 2026 Second Quarter Results ** 99.2 Investor presentation dated September 9 , 2026** 104 Cover Page Interactive Data File (embedded within the Inline XBRL document)* * Filed herewith. ** Furnished herewith. 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. Core & Main, Inc. By: /s/ Jackie M. Burkhardt Name: Jackie M. Burkhardt Title: General Couns