American Bank Holding Shareholders Approve The Previously Announced Proposed Merger Of American With And Into Prosperity Bancshares

Prosperity Bancshares, Inc.® (NYSE:PB) ("Prosperity"), the parent company of Prosperity Bank®, and American Bank Holding Corporation ("American"), the parent holding company of American Bank, N.A. ("American Bank"), headquartered in Corpus Christi, Texas, today jointly announced that the shareholders of American have approved the previously announced proposed merger of American with and into Prosperity, with Prosperity continuing as the surviving corporation, to be followed by the proposed merger of American Bank with and into Prosperity Bank. The Board of Governors of the Federal Reserve System, the Federal Deposit Insurance Corporation and the Texas Department of Banking have approved the transaction.

All required regulatory and shareholder approvals to complete the transaction have now been received and the transaction is expected to be completed on January 1, 2026, subject to the satisfaction or waiver of the remaining customary closing conditions set forth in the merger agreement between Prosperity and American (the "Merger Agreement").