X0306 4/A 2018-01-18 2018-01-22 0 0000090498 SIMMONS FIRST NATIONAL CORP SFNC 0001235478 MAKRIS GEORGE JR SIMMONS FIRST NATIONAL CORP. 501 MAIN STREET PINE BLUFF AR 71601 1 1 0 0 Chairman & CEO SFNC 120767 D SFNC 44396 D SFNC 1871 I Trust SFNC 898 D SFNC 508 D SFNC 4050 I By IRA SFNC 4750 I IRA (Spouse) SFNC 67 I By IRA Restricted Stock Unit 58.25 2018-01-18 4 M 0 2270 58.25 D Common 2270 5421 D Shares were unintentionally listed in the "acquired" column in original filing on January 22, 2018. The Restricted Stock Unit vested on January 18, 2018. One half of the Restricted Stock Unit vests on January 18, 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/ George Makris, Jr. by Danielle Hasty 2018-01-23