X0304 4 2011-12-13 0 0001361538 Primoris Services Corp PRIM 0001440820 Schauerman John C/O PRIMORIS SERVICES CORPORATION 2100 MCKINNEY AVENUE, SUITE 1500 DALLAS TX 75201 1 1 0 0 Exec. VP Corp. Dev. Common Stock 2011-12-13 4 S 0 4000 15.115 D 1357323 I By Trust Shares of Common Stock held by John P. Schauerman & Claudia H. Schauerman TR UA 08/10 Schauerman Family Trust. /s/ Peter J. Moerbeek, by power of attorney 2011-12-15