Prosperity Bancshares Predicts Margin Growth to 3.25-3.3% by 2025, Reinforces South Texas Dominance through American Bank Merger
In a significant move for the South Texas banking sector, Prosperity Bancshares, Inc. (PB) and American Bank Holding Corporation based in Corpus Christi have announced a definitive merger agreement. The deal, set to take place in the latter half of 2025, will see Prosperity Bancshares acquire American Bank Holding Corporation and its banking subsidiary, American Bank, N.A.
As of March 31, 2025, American Bank reported total assets of $2.5 billion, total loans of $1.8 billion, and total deposits of $2.3 billion. It operates 18 banking offices and 2 loan production offices across South and Central Texas, including Corpus Christi, San Antonio, Austin, Victoria, Port Aransas, Rockport, and a loan office in Houston. Prosperity Bancshares, headquartered in Houston, reported $38.765 billion in assets at the same date.
Under the terms of the agreement, Prosperity will issue 4,439,981 shares of its common stock to American Bank shareholders, valued at approximately $321.5 million based on Prosperity's closing price of $72.40 on July 16, 2025.
Key leadership changes will occur post-merger. Stephen Raffaele, CEO and president of American Bank, will become South Texas and San Antonio Area chairman at Prosperity Bank. Ben Wallace, American Bank chairman, will serve as South Texas senior chairman, and other American Bank executives will take key roles within the combined organization.
The merger has been unanimously approved by both companies’ Boards of Directors and is subject to customary regulatory approvals and American’s shareholder consent. It is expected to close in Q4 2025 or Q1 2026.
American Bank is advised by Stephens Inc. (financial) and Norton Rose Fulbright (legal), while Prosperity is advised by Keefe, Bruyette & Woods (financial) and Wachtell, Lipton, Rosen & Katz (legal). Until approvals conclude and the merger is finalized, both banks will continue to operate separately with a focus on a smooth transition for employees and clients.
This merger represents a strategic move for Prosperity Bancshares, aiming to expand its footprint across Texas by adding American Bank’s strong presence in South and Central Texas markets. The combined entity will aim to leverage strengths in relationship banking and customer service under a larger regional institution.
[1] Prosperity Bancshares, Inc. Press Release, July 18, 2025. [2] American Bank Holding Company Press Release, July 18, 2025. [3] Keefe, Bruyette & Woods Press Release, July 18, 2025. [4] Norton Rose Fulbright Press Release, July 18, 2025.
The strategic merger between Prosperity Bancshares, Inc. and American Bank Holding Corporation, two significant players in the South Texas banking-and-insurance industry, is expected to close in Q4 2025 or Q1 2026. With Prosperity Bancshares aiming to expand its business in Texas through the acquisition of American Bank, the combined entity is poised to leverage strengths in both relationship banking and customer service in the finance sector.
