X0306 4 2020-08-28 0 0001361538 Primoris Services Corp PRIM 0001620715 King David Lee C/O PRIMORIS SERVICES CORPORATION 2300 N. FIELD STREET, SUITE 1900 DALLAS TX 75201 1 0 0 0 Common Stock 2020-08-28 4 M 0 14115 A 56029 D Common Stock 2020-08-28 4 F 0 5554 18.93 D 50475 D Restricted Stock Unit 2020-08-28 4 M 0 14115 0 D Common Stock 14115 0 D Each restricted stock unit represents a contingent right to receive one share of PRIM common stock or the cash value thereof on the date of settlement, in the Company's discretion. The restricted stock units vested six months from the date of grant. Vested restricted stock units settled in stock on August 28, 2020. Withholding of common stock to satisfy reporting person's tax obligation upon the settlement of vested restricted stock units. /s/ Kenneth M. Dodgen, by power of attorney 2020-08-31