X0303 4 2009-09-01 0000092416 SOUTHWEST GAS CORP SWX 0001446274 Haller Karen S 5241 SPRING MOUNTAIN ROAD LAS VEGAS NV 89150-0002 1 VP/General Counsel Common Stock 2009-09-01 4 A 0 38.1049 23.98 A 6284.3105 D Common Stock 2009-09-01 4 A 0 15.6125 23.98 A 6299.923 D Common Stock 2009-09-01 4 A 0 8.1589 23.98 A 6308.0819 D Common Stock 2009-09-01 4 A 0 11.8356 23.98 A 1559.9653 I By 401(k) Common Stock 2009-09-01 4 A 0 6.2971 23.98 A 830.0028 I By Spouse Karen W. Stanfield, POA 2009-09-02