IBP: Company disclosure

Item 7.01 Regulation FD Disclosure On May 19, 2026, the Company issued a press release announcing the completion of its acquisition of Diamond Energy Systems, Inc. In addition, the Company provided an update on recent share repurchases under its existing stock repurchase program. A copy of the press release is furnished as Exhibit 99.1 to this report. The information contained in this Item 7.01 is being furnished and shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section. Furthermore, the information contained in this Item 7.01 shall not be deemed to be incorporated by reference into any registration statement or other document filed with the Securities and Exchange Commission, except as shall be expressly set forth by specific reference in such filing. Item 9.01 Financial Statements and Exhibits (d) Exhibits: Exhibit No. Description 99.1 Press Release of Installed Building Products, Inc. dated May 19, 2026 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized on this 19th day of May, 2026. INSTALLED BUILDING PRODUCTS, INC. By: /s/ Michael T. Miller Name: Michael T. Miller Title: Chief Financial Officer