IBERIABANK CORPORATION (a Louisiana corporation) 4,000,000 Depositary Shares Each Representing a 1/400th Interest in a Share Of 6.100% Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D UNDERWRITING AGREEMENT Dated: March 28, 2019Underwriting Agreement • March 29th, 2019 • Iberiabank Corp • State commercial banks • New York
