INTERNATIONAL BANCSHARES CORP 8-KCurrent Reports (8-K / ad hoc)

Legal Proceedings

Item 3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. On October 6, 2026, International Bancshares Corporation (the “Company”), acting pursuant to authorization from its Board of Directors, notified The Nasdaq Stock Market LLC (“Nasdaq”) of its intention to voluntarily withdraw the listing of the Company’s common stock, par value $1.00 per share (the “Common Stock”), from Nasdaq and transfer the listing to the Texas Stock Exchange LLC (“TXSE”). The Company expects the listing and trading of its Common Stock on Nasdaq to cease at the close of trading on Friday, October 16, 2026, and the listing and trading of its Common Stock on TXSE to begin at market open on Monday, October 19, 2026. The Common Stock has been approved for listing on TXSE, where it will continue to trade under the ticker symbol “IBOC.”