X0306 4 2012-08-16 0 0001361538 Primoris Services Corp PRIM 0001219603 ROSENFELD ERIC C/O PRIMORIS SERVICES CORPORATION 2100 MCKINNEY AVENUE, SUITE 1500 DALLAS TX 75201 1 0 0 0 Common Stock 2012-08-16 4 S 0 2245 13.00 D 817878 D Common Stock 2012-08-17 4 S 0 35864 13.010 D 782014 D Common Stock 106840 I Held by the Rosenfeld 1991 Childrens' Trust Held by the Rosenfeld 1991 Childrens' Trust, of which Mr. Rosenfeld's wife is the sole trustee. /s/Peter J. Moerbeek, by power of attorney 2012-08-20