X0306 4 2018-01-23 0 0000090498 SIMMONS FIRST NATIONAL CORP SFNC 0001638649 DORAMUS MARK C 9 WEST PALISADES LITTLE ROCK AR 72207 1 0 0 0 SFNC 2018-01-23 4 M 0 303 59.45 A 3438 D Restricted Stock Unit 2018-01-23 4 A 0 1212 0.00 A Common 1212 1212 D Restricted Stock Unit 59.45 2018-01-23 4 M 0 303 59.45 D Common 303 909 D Each Restricted Stock Unit represents a contingent right to receive one share of Simmons First National Corporation common stock. 25% of the Restricted Stock Units vest on January 23, 2018, April 02, 2018, July 02, 2018 and October 01, 2018. 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. The Restricted Stock Unit vested on January 23, 2018. One third of the Restricted Stock Unit vests on April 02, 2018, July 02, 2018 and October 01, 2018. 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/ Mark C. Doramus by Danielle Hasty 2018-01-25