Insteel Industries, Inc.

Item 2.05. Costs Associated with Exit or Disposal Activities The information set forth under Item 8.01 below is hereby incorporated into this Item 2.05 by reference.

Item 8.01. Other Events On August 21, 2026, Insteel Industries Inc. issued a Press Release announcing that its wholly-owned subsidiary, Insteel Wire Products Company (together referred to as “Insteel” or the “Company”), will be closing its facility in Upper Sandusky, Ohio, and moving the manufacturing to the Company’s remaining welded wire reinforcement production facilities. The consolidation of the Company’s welded wire manufacturing operations is expected to result in the elimination of up to 65 positions at the Upper Sandusky facility. It is anticipated that operations at the facility will cease by the end of October 2026. Insteel expects to incur a restructuring charge of approximately $4.6 million related to the facility’s closure, which includes $2.5 million for equipment relocation costs, $0.4 million for employee separation costs, $1.0 million for asset impairment and $0.7 million for other closure-related costs. Insteel expects that the restructuring charges, other than asset impairment, will consist of cash expenditures, which are anticipated to begin in the first quarter of fiscal 2027 and continue through the remainder of the fiscal year. Cautionary Note Regarding Forward-Looking Statements This Current Report on Form 8-K contains forward-looking statements within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. When used in this Current Report, the words “believes,” “anticipates,” “expects,” “estimates,” “appears,” “plans,” “intends,” “may,” “should,” “could” and similar expressions are intended to identify forward-looking statements. Although we believe that our plans, intentions and expectations reflected in or suggested by such forward-looking statements are reasonable, they are subject to a number of risks and uncertainties, and we can provide no assurances that such plans, intentions or expectations will be implemented or achieved. Many of these risks and uncertainties are discussed in detail and are updated from time to time in our filings with the U.S. Securities and Exchange Commission (the “SEC”), in particular in our Annual Report on Form 10-K for the fiscal year ended September 27, 2025. All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by these cautionary statements. All forward-looking statements speak only to the respective dates on which such statements are made and we do not undertake any obligation to publicly release the results of any revisions to these forward-looking statements that may be made to reflect any future events or circumstances after the date of such statements or to reflect the occurrence of anticipated or unanticipated events, except as may be required by law.