X0305 4 2012-06-27 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 2012-06-27 4 S 0 17900 12.013 D 15439676 D Common Stock 2012-06-28 4 S 0 92392 12.031 D 15347284 D Common Stock 2012-06-29 4 S 0 39500 12.187 D 15307784 D Common Stock 97810 I by Spouse /s/ Peter J. Moerbeek, by power of attorney 2012-06-29