X0306 4 2018-03-01 0001692115 Southwest Gas Holdings, Inc. SWX 0001446274 Haller Karen S 5241 SPRING MOUNTAIN ROAD LAS VEGAS NV 89150-0002 1 EVP/Chief Legal/Admin/Corp Sec Common Stock 2018-03-01 5 A 0 111.8900 65.3600 A 25042.1072 D Common Stock 2018-03-01 5 A 0 26.4310 65.3600 A 25068.5382 D Common Stock 2018-03-01 5 A 0 26.2940 65.3600 A 25094.8322 D Common Stock 2018-06-01 5 A 0 101.5170 76.2500 A 23857.3492 D Common Stock 2018-06-01 5 A 0 23.9810 76.2500 A 23881.3302 D Common Stock 2018-06-01 5 A 0 23.8560 76.2500 A 23905.1862 D Common Stock 2018-09-04 5 A 0 90.6640 78.2800 A 23995.8502 D Common Stock 2018-09-04 5 A 0 23.5180 78.2800 A 24019.3682 D Common Stock 2018-09-04 5 A 0 23.3960 78.2800 A 24042.7642 D Common Stock 2018-12-03 5 A 0 89.0810 80.2000 A 24131.8452 D Common Stock 2018-12-03 5 A 0 23.1080 80.2000 A 24154.9532 D Common Stock 2018-12-03 5 A 0 22.9870 80.2000 A 24177.9402 D Common Stock 2018-03-01 5 A 0 14.3121 65.3600 A 1942.7830 I By 401(k) Common Stock 2018-06-01 5 A 0 13.2040 76.2500 A 1955.9870 I By 401(k) Common Stock 2018-09-04 5 A 0 12.8980 78.2800 A 1968.8850 I By 401(k) Common Stock 2018-12-03 5 A 0 12.8960 80.2000 A 1981.7810 I By 401(k) Common Stock 1002.4580 I By Spouse Amounts voluntarily reported were acquired through exempt dividend reinvestment transactions. Kyle Stephens, POA 2018-12-19