X0306 4 2018-03-01 0001692115 Southwest Gas Holdings, Inc. SWX 0001498494 Peterson Gregory J 5241 SPRING MOUNTAIN ROAD LAS VEGAS NV 89150 1 SVP/Chief Financial Officer Common Stock 2018-03-01 5 A 0 11.7560 65.3600 A 10193.7511 D Common Stock 2018-03-01 5 A 0 10.2920 65.3600 A 10204.0431 D Common Stock 2018-03-01 5 A 0 5.5090 65.3600 A 10209.5521 D Common Stock 2018-06-01 5 A 0 10.6670 76.2500 A 10220.2191 D Common Stock 2018-06-01 5 A 0 9.3370 76.2500 A 10229.5561 D Common Stock 2018-06-01 5 A 0 4.9650 76.2500 A 10234.5211 D Common Stock 2018-09-04 5 A 0 10.4620 78.2800 A 10244.9831 D Common Stock 2018-09-04 5 A 0 9.1570 78.2800 A 10254.1401 D Common Stock 2018-09-04 5 A 0 4.8390 78.2800 A 10258.9791 D Common Stock 2018-12-03 5 A 0 10.2790 80.2000 A 10269.2581 D Common Stock 2018-12-03 5 A 0 8.9980 80.2000 A 10278.2561 D Common Stock 2018-12-03 5 A 0 4.7260 80.2000 A 10282.9821 D Common Stock 2018-03-01 5 A 0 34.1701 65.3600 A 4626.9921 I By 401(k) Common Stock 2018-06-01 5 A 0 31.5290 76.2500 A 4658.5211 I By 401(k) Common Stock 2018-09-04 5 A 0 30.7959 78.2800 A 4689.3170 I By 401(k) Common Stock 2018-12-03 5 A 0 30.7890 80.2000 A 4720.1060 I By 401(k) Amounts voluntarily reported were acquired through exempt dividend reinvestment transactions. Kyle Stephens, POA 2018-12-19