Exhibit 99.1 ® FOR IMMEDIATE RELEASE PRESS RELEASE For more information contact: Prosperity Bancshares, Inc. Cullen Zalman Prosperity Bank Plaza Executive Vice President – Banking and Corporate Activities 4295 San Felipe 281.269.7199 Houston, Texas 77027 cullen.zalman@prosperitybankusa.com PROSPERITY BANCSHARES, INC. ® REPORTS THIRD QUARTER 2025 EARNINGS HOUSTON, October 29, 2025. Prosperity Bancshares, Inc. ® (NYSE: PB) ("Prosperity Bancshares"), the parent company of Prosperity Bank ® (collectively, "Pros ...