UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended December 30, 2023. or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from_____to_____. Commission File Number: 1-9929 Insteel Industries Inc. (Exact name of registrant as specified in its charter) North Carolina 56-0674867 (State or other ...