X0306 4 2018-03-01 0001692115 Southwest Gas Holdings, Inc. SWX 0001350064 Hester John P 5241 SPRING MOUNTAIN ROAD LAS VEGAS NV 89150-0002 1 President and CEO Common Stock 2018-03-01 5 A 0 113.7850 65.3600 A 65987.9765 D Common Stock 2018-03-01 5 A 0 77.6380 65.3600 A 66065.6145 D Common Stock 2018-06-01 5 A 0 103.2370 76.2500 A 66168.8515 D Common Stock 2018-06-01 5 A 0 70.4400 76.2500 A 66239.2915 D Common Stock 2018-09-04 5 A 0 101.2450 78.2800 A 66340.5365 D Common Stock 2018-09-04 5 A 0 69.0810 78.2800 A 66409.6175 D Common Stock 2018-12-03 5 A 0 99.4780 80.2000 A 66509.0955 D Common Stock 2018-12-03 5 A 0 67.8760 80.2000 A 66576.9715 D Common Stock 2018-03-01 5 A 0 28.2420 65.3600 A 3814.2265 I By 401(k) Common Stock 2018-06-01 5 A 0 26.0780 76.2500 A 3840.3045 I By 401(k) Common Stock 2018-09-04 5 A 0 25.4630 78.2800 A 3865.7675 I By 401(k) Common Stock 2018-12-03 5 A 0 25.4590 80.2000 A 3891.2265 I By 401(k) Common Stock 5342.5148 I By IRA Common Stock 2422.3500 I By Spouse Amounts voluntarily reported were acquired through exempt dividend reinvestment transactions. Kyle Stephens, POA 2018-12-17