X0508 4 2025-11-07 0001361538 Primoris Services Corp PRIM 0001663507 Wagner Patricia K C/O PRIMORIS SERVICES CORPORATION 2300 NORTH FIELD STREET, SUITE 1900 DALLAS TX 75201 true false false false 0 Common Stock 2025-11-07 4 S 0 13491 125.2283 D 4495 I By Wagner Family Trust Common Stock 2543 D These shares were sold in multiple transactions at prices ranging from $125.14 to $125.73 per share, inclusive. The holder undertakes to provide 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. These shares are owned directly by the Wagner Family Trust dated March 24, 2008 and indirectly by Patricia K. Wagner. /s/ Kenneth M. Dodgen, Attorney-in-Fact 2025-11-12