Norton Rose Fulbright advises American Bank Holding Corporation in sale to Prosperity Bancshares

Norton Rose Fulbright served as legal counsel to American Bank Holding Corporation (American), the parent holding company of American Bank, N.A., in its definitive merger agreement with Prosperity Bancshares, Inc. (Prosperity).

Under the terms and subject to the conditions of the merger agreement, Prosperity will issue 4,439,981 shares of Prosperity common stock for all outstanding shares of American common stock, subject to certain potential adjustments.

Based on Prosperity’s closing price of US$72.40 on July 16, 2025, the total consideration was valued at approximately US$321.5 million.

Upon completion of the merger, Stephen Raffaele, Director and President of American and CEO and President of American Bank, and Patt Hawn Wallace, Chair of American and a Director of American Bank, will join the Board of Directors of Prosperity Bank.

American operates 18 banking offices and two loan production offices. Founded in Corpus Christi, American has US$2.5 billion in total assets.

Houston-based Prosperity, the parent company of Prosperity Bank, currently operates 283 full-service banking locations throughout Texas and Oklahoma.

The transaction is anticipated to close in the first quarter of 2026, subject to regulatory and shareholder approval and the satisfaction of other customary conditions.

Norton Rose Fulbright’s M&A and securities team was led by Bryn Sappington (Dallas) and included Evan Hardee, Blake Redwine, Steven Constantin, Ted Tooley and Amanda Yang (Dallas). Robert Phillpott (Houston), Alexander Clark and Katherine Oglesby (Dallas) provided substantial support.