X0306 4 2017-02-23 0 0000090498 SIMMONS FIRST NATIONAL CORP SFNC 0001699300 McCaleb Johnny W C/O SIMMONS FIRST NATIONAL CORP. 501 MAIN STREET PINE BLUFF AR 71601 0 1 0 0 EVP & Audit Executive SFNC 221 D Restricted Stock Unit 2017-02-23 4 A 0 500 0 A Common 500 500 D Each Restricted Stock Unit represents a contingent right to receive one share of Simmons First National Corporation common stock. One third of the Restricted Stock Unit vests on February 23, 2018, 2019 and 2020. SFNC shares will be delivered within 30 days of vesting. Events such as retirement, death, disability and other specified events in the agreement may result in earlier vesting. /s/ Johnny W. McCaleb by Piper P. Erwin 2017-03-03