| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| MASHINSKI CARLA S | Director | C/O PRIMORIS SERVICES CORPORATION, 2300 N. FIELD STREET, SUITE 1900, DALLAS | /s/ Kennetih M. Dodgen, Attorney-in-Fact | 09 Dec 2025 | 0001286202 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | PRIM | Common Stock | Sale | -$281K | -2.08K | -8.82% | $135.14 | 21.5K | 08 Dec 2025 | Direct |