X0306 4 2018-06-01 0001692115 Southwest Gas Holdings, Inc. SWX 0001740097 Brown Justin L 5241 SPRING MOUNTAIN ROAD LAS VEGAS NV 89150-0002 1 SVP/General Counsel Common Stock 2018-06-01 5 A 0 13.3420 76.2500 A 5034.0285 D Common Stock 2018-06-01 5 A 0 10.8220 76.2500 A 5044.8505 D Common Stock 2018-09-04 5 A 0 13.0850 78.2800 A 5057.9355 D Common Stock 2018-09-04 5 A 0 10.6130 78.2800 A 5068.5485 D Common Stock 2018-12-03 5 A 0 12.8570 80.2000 A 4781.4055 D Common Stock 2018-12-03 5 A 0 10.4280 80.2000 A 4791.8335 D Common Stock 2018-06-01 5 A 0 24.9871 76.2500 A 2573.6461 I By 401(k) Common Stock 2018-09-04 5 A 0 23.4550 78.2800 A 2597.1011 I By 401(k) Common Stock 2018-12-03 5 A 0 24.4880 80.2000 A 2621.5891 I By 401(k) Amounts voluntarily reported were acquired through exempt dividend reinvestment transactions. Kyle Stephens, POA 2018-12-19