Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT ☒ OF 1934 For Quarterly Period Ended December 31, 2023 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT ☐ OF 1934 For Transition Period From to Commission File Number 000-26591 RGC Resources, Inc. (Exact name of Registrant as Specified in its Charter) Virginia 54-1909697 (State or Othe ...