X0306 4 2020-09-28 0 0001361538 Primoris Services Corp PRIM 0001441321 Tucker Thomas E. C/O PRIMORIS SERVICES CORPORATION 2300 N. FIELD STREET, SUITE 1900 DALLAS TX 75201 1 0 0 0 Common Stock 2020-09-28 4 S 0 10000 18.69 D 19293 D Common Stock 4593 I By Trust Common Stock 303 I By SaraJen Capital LLC Shares of Common Stock held by Tucker Family Trust U/A dated 12/21/1988, a revocable trust of which Mr. Tucker is a trustee and beneficiary. Shares of Common Stock held by SaraJen Capital LLC, a California Limited Liability Company, of which Mr. Tucker is a one-third member and sole manager with full dispositive power over these shares. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.62 to $18.80 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. /s/ Kenneth M. Dodgen, by power of attorney 2020-09-30