PROSPERITY BANCSHARES, INC.® COMPLETES MERGER WITH FIRST BANCSHARES OF TEXAS, INC. PR Newswire HOUSTON, May 1, 2023 HOUSTON , May 1, 2023 /PRNewswire/ -- Prosperity Bancshares, Inc.® ("Prosperity") (NYSE: PB), the parent company of Prosperity Bank®, today announced the completion of the merger of First Bancshares of Texas , Inc. ("First Bancshares") with and into Prosperity and the merger of First Bancshares' wholly owned subsidiary, FirstCapital Bank of Texas , N.A. ("FirstCapital"),...