EXHIBIT 99.1 Civista Bancshares, Inc. Announces Third-Quarter 2025 Financial Results of $0.68 per Common Share, up 28$0.53 per Common Share from Third-Quarter 2024 Sandusky, Ohio, October 23, 2025 /PRNewswire/– Civista Bancshares, Inc. (NASDAQ:CIVB) ("Civista") today reported net income of $12.8 million, or$0.68 per common share, for the quarter ended September 30, 2025. 1 • Completed an underwritten public offering of common stock, including an overallotment option. The offering totaled 3,788,238 s ...