X0305 4 2012-06-05 0 0001361538 Primoris Services Corp PRIM 0001441252 Pratt Brian C/O PRIMORIS SERVICES CORPORATION 2100 MCKINNEY AVENUE, SUITE 1500 DALLAS TX 75201 1 1 1 0 Chairman, CEO & President Common Stock 2012-06-05 4 S 0 66030 12.009 D 15843621 D Common Stock 2012-06-06 4 S 0 40047 12.139 D 15803574 D Common Stock 2012-06-07 4 S 0 19603 12.264 D 15783971 D Common Stock 97810 I by Spouse /s/ Peter J. Moerbeek, by power of attorney 2012-06-07