X0306 4 2017-02-21 0 0001361538 Primoris Services Corp PRIM 0001202079 TINSTMAN ROBERT A C/O PRIMORIS SERVICES CORPORATION 2100 MCKINNEY AVENUE, SUITE 1500 DALLAS TX 75201 1 0 0 0 Common Stock 2017-02-21 4 A 0 1964 A 26518 D The non-employee director compensation program adopted by the Board in May 2011 and updated August 5, 2014, provides for the issuance of restricted stock with a value of $46,667 resulting in a grant of 1,964 shares of stock. The shares of stock cannot be sold for a period of twelve months from the date of grant. /s/ Peter J. Moerbeek, by power of attorney 2017-02-22