NOTICE OF SPECIAL MEETING OF SHAREHOLDERS OF FIRST NATIONAL BANK IN PORT LAVACA Notice is hereby given that a special meeting of the shareholders of First National Bank in Port Lavaca, Port Lavaca, Texas (“FNB”), will be held on May 6, 2026, at 2:00 p.m., local time, at its main office located at 1101 South Highway 35 By-Pass, Port Lavaca, Texas 77979, to approve and adopt the Agreement and Plan of Merger, dated as of March 31, 2026 (the “Merger Agreement”), by and between FNB and Coastal Bend Bancshares, Inc., a Texas corporation and registered bank holding company (the “Buyer”), which provides that a to-be formed interim national banking association and wholly-owned subsidiary of Buyer shall be consolidated with FNB, in a transaction intended to be treated as a stock purchase for U.S. federal income tax purposes under 12 U.S.C. § 215 of the National Bank Act, with FNB surviving the consolidation as a wholly-owned subsidiary of Buyer. A copy of the Merger Agreement, approved by the board of directors of FNB, is on file at FNB and may be inspected during business hours.