X0306 4 2018-03-01 0001692115 Southwest Gas Holdings, Inc. SWX 0001234538 KENNY KENNETH J 5241 SPRING MOUNTAIN ROAD LAS VEGAS NV 89150-0002 1 VP/Finance/Treasur Common Stock 2018-03-01 5 A 0 98.6100 65.3600 A 16107.7556 D Common Stock 2018-03-01 5 A 0 12.1210 65.3600 A 16119.8766 D Common Stock 2018-03-01 5 A 0 10.5390 65.3600 A 16130.4156 D Common Stock 2018-06-01 5 A 0 89.4680 76.2500 A 16219.8836 D Common Stock 2018-06-01 5 A 0 10.9980 76.2500 A 16230.8816 D Common Stock 2018-06-01 5 A 0 9.5620 76.2500 A 16240.4436 D Common Stock 2018-09-04 5 A 0 87.7420 78.2800 A 16328.1856 D Common Stock 2018-09-04 5 A 0 10.7860 78.2800 A 16338.9716 D Common Stock 2018-09-04 5 A 0 9.3780 78.2800 A 16348.3496 D Common Stock 2018-12-03 5 A 0 82.9680 80.2000 A 15931.1086 D Common Stock 2018-12-03 5 A 0 10.5970 80.2000 A 15941.7056 D Common Stock 2018-12-03 5 A 0 9.2140 80.2000 A 15950.9196 D Common Stock 2018-03-01 5 A 0 35.0019 65.3600 A 4732.8121 I By 401(k) Common Stock 2018-06-01 5 A 0 32.3121 76.2500 A 4765.1242 I By 401(k) Common Stock 2018-09-04 5 A 0 31.5530 78.2800 A 4796.6772 I By 401(k) Common Stock 2018-12-03 5 A 0 31.5510 80.2000 A 4828.2282 I By 401(k) Common Stock 2018-03-01 5 A 0 0.2300 65.3600 A 30.2592 I By Custodian For Child Common Stock 2018-06-01 5 A 0 0.2090 76.2500 A 30.4682 I By Custodian For Child Common Stock 2018-09-04 5 A 0 0.2050 78.2800 A 30.6732 I By Custodian For Child Common Stock 2018-12-03 5 A 0 0.2010 80.2000 A 31.2580 I By Custodian For Child Amounts voluntarily reported were acquired through exempt dividend reinvestment transactions. Justin L. Brown, POA 2018-12-19