X0306 4 2018-06-01 0001692115 Southwest Gas Holdings, Inc. SWX 0001740091 Colvin Lori L 5241 SPRING MOUNTAIN ROAD LAS VEGAS NV 89150-0002 1 VP/Controller/CAO Common Stock 2018-06-01 5 A 0 9.1600 76.2500 A 2679.1490 D Common Stock 2018-06-01 5 A 0 4.5430 76.2500 A 2683.6920 D Common Stock 2018-06-01 5 A 0 4.5060 76.2500 A 2688.1980 D Common Stock 2018-09-04 5 A 0 8.9840 78.2800 A 2697.1820 D Common Stock 2018-09-04 5 A 0 4.4550 78.2800 A 2701.6370 D Common Stock 2018-09-04 5 A 0 4.4190 78.2800 A 2706.0560 D Common Stock 2018-12-03 5 A 0 8.8270 80.2000 A 2714.8830 D Common Stock 2018-12-03 5 A 0 4.3770 80.2000 A 2719.2600 D Common Stock 2018-12-03 5 A 0 4.3421 80.2000 A 2723.6021 D Common Stock 2018-06-01 5 A 0 14.8120 76.2500 A 2177.4890 I By 401(k) Common Stock 2018-09-04 5 A 0 14.3979 78.2800 A 2191.8869 I By 401(k) Common Stock 2018-12-03 5 A 0 14.3951 80.2000 A 2206.2820 I By 401(k) Amounts voluntarily reported were acquired through exempt dividend reinvestment transactions. Kyle Stephens, POA 2018-12-19