Amendments to Bylaws Regarding Board of Directors Size

National Bankshares, Inc. has amended its Bylaws, reducing the size of its Board of Directors from thirteen to twelve members. This change, effective May 13, 2026, is due to the retirement of one director, Charles E. Green, III, who will not stand for re-election at the 2026 Annual Meeting of Shareholders due to the company's age limit policy for directors. Mr. Green's retirement is not related to any disagreements concerning the company's operations, policies, or practices. The amendment aligns with the company's Articles of Incorporation, which permit the Board size to range from nine to twenty-six directors. The updated Bylaws, as amended and restated, have been filed as an exhibit.