Entry into a Material Definitive Agreement. Transaction Agreement On August 7, 2026, IES Holdings, Inc, a Delaware corporation (“IES”), entered into a Transaction Agreement (the “Agreement”) with IES Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of IES (“Merger Sub”), Innovate Corp., a Delaware corporation (“Parent”) and DBM Global Intermediate Holdco Inc., a Delaware corporation (“Intermediate” and together with Parent, “Seller”). The Agreement provides that, among oth…

Unregistered Sales of Equity Securities. Pursuant to the terms of the Agreement, at the Closing, IES will issue shares of Buyer Common Stock comprising the Stock Consideration to Seller. The Stock Consideration will be issued in a private placement exempt from the registration requirements of the Securities Act, in reliance on the exemptions set forth in Section 4(a)(2) thereof.

Regulation FD Disclosure. On August 10, 2026, IES and Parent issued a joint press release (the “Press Release”) announcing the entry into the Agreement. A copy of the Press Release is furnished hereto as Exhibit 99.1. Neither the information reported herein nor in the Press Release shall be deemed “filed” for purposes of Section 18 of the Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section unless IES specifically states that the infor…

Results of Operations and Financial Condition. On July 31, 2026, IES Holdings, Inc. (the “Company”) issued a press release announcing its results of operations for the fiscal 2026 third quarter. A copy of the press release is furnished with this report as Exhibit 99.1.

Results of Operations and Financial Condition. On May 1, 2026, IES Holdings, Inc. (the “Company”) issued a press release announcing its results of operations for the fiscal 2026 second quarter. A copy of the press release is furnished with this report as Exhibit 99.1.

Results of Operations and Financial Condition. On January 30, 2026, IES Holdings, Inc. (the “Company”) issued a press release announcing its results of operations for the fiscal 2026 first quarter. A copy of the press release is furnished with this report as Exhibit 99.1.

Results of Operations and Financial Condition. On November 21, 2025, IES Holdings, Inc. (the “Company”) issued a press release announcing its results of operations for the fiscal 2025 fourth quarter. A copy of the press release is furnished with this report as Exhibit 99.1.

Mr. Simmes: Approval of a Supplementary Short Term Incentive Plan (SSTIP) for Mr. Simmes.

Regulation FD Disclosure. On November 7, 2025, IES and Gulf Island issued a joint press release (the “Press Release”) announcing the entry into the Merger Agreement. A copy of the Press Release is furnished hereto as Exhibit 99.1. Neither the information reported herein nor in the Press Release shall be deemed “filed” for purposes of Section 18 of the Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section unless the Company specifically…

Entry into a Material Definitive Agreement. Agreement and Plan of Merger On November 7, 2025, IES Holdings, Inc, a Delaware corporation (“IES”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Gulf Island Fabrication, Inc., a Louisiana corporation (“Gulf Island” or the “Company”), and IES Merger Sub, LLC, a Louisiana limited liability company and an indirect wholly owned subsidiary of IES (“Merger Sub”). The Merger Agreement provides that, among other things and on…

Results of Operations and Financial Condition. On August 1, 2025, IES Holdings, Inc. (the “Company”) issued a press release announcing its results of operations for the fiscal 2025 third quarter. A copy of the press release is furnished with this report as Exhibit 99.1.

Chief Executive Officer — Matthew J. Simmes: Matthew J. Simmes was promoted to Chief Executive Officer and received a base salary increase.

President and Chief Executive Officer — Matthew J. Simmes: Matthew J. Simmes was promoted to President and Chief Executive Officer.

Director — Kelly C. Janzen: Election of Kelly C. Janzen as a director and appointment to the Audit Committee.

Results of Operations and Financial Condition. On May 2, 2025, IES Holdings, Inc. (the “Company”) issued a press release announcing its results of operations for the fiscal 2025 second quarter. A copy of the press release is furnished with this report as Exhibit 99.1.

Results of Operations and Financial Condition. On February 4, 2025, IES Holdings, Inc. (the “Company”) issued a press release announcing its results of operations for the fiscal 2025 first quarter. A copy of the press release is furnished with this report as Exhibit 99.1.

Entry into a Material Definitive Agreement. On January 21, 2025, IES Holdings, Inc. (“IES” or the “Company”), entered into the Fourth Amended and Restated Credit Agreement (the “Amended Credit Agreement”), by and among the Company and each of the other borrowers and guarantors named therein with Wells Fargo Bank, National Association, as administrative agent, swingline lender and issuing lender, Wells Fargo Securities LLC and Fifth Third Bank, National Association as joint lead arrangers and…

Creation of a Direct Financial Obligation. The information set forth under

of this Current Report on Form 8-K, including Exhibit 99.1 furnished herewith, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act of 1934, or otherwise subject to the liabilities of Section 18, and shall not be incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act of 1934, except as set forth by specific reference in such filing. (d) Exhibits. Exhibit Number Description 10.1 — Fourth Amended and Restated Cre…

The filing details compensation bonuses and equity grants to executive officers.

Results of Operations and Financial Condition. On November 22, 2024, IES Holdings, Inc. (the “Company”) issued a press release announcing its results of operations for the fiscal 2024 fourth quarter. A copy of the press release is furnished with this report as Exhibit 99.1.

Director — John Louis Fouts: Election of John Louis Fouts as a director and his appointment to the Audit Committee.

Director — Elizabeth D. Leykum: Resigned due to other commitments.

Results of Operations and Financial Condition. On August 2, 2024, IES Holdings, Inc. (the “Company”) issued a press release announcing its results of operations for the fiscal 2024 third quarter. A copy of the press release is furnished with this report as Exhibit 99.1.

Results of Operations and Financial Condition. On May 3, 2024, IES Holdings, Inc. (the “Company”) issued a press release announcing its results of operations for the fiscal 2024 second quarter. A copy of the press release is furnished with this report as Exhibit 99.1.