X0306 4 2019-03-11 0 0001699136 Cactus, Inc. WHD 0001754023 Isaac David John 920 MEMORIAL CITY WAY, SUITE 300 HOUSTON TX 77024 0 1 0 0 GC and VP of Administration Restricted Stock Units 2019-03-11 4 A 0 12041 0 A Class A Common Stock 12041 21157 D Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A common stock. The restricted stock units vest in three equal annual installments beginning on the first anniversary of the award date. Vested shares will be delivered to the reporting person within 60 days of the vesting date. Includes restricted stock units previously granted to the reporting person that remain subject to vesting. /s/ David Isaac, by Ike Smith as Attorney-in-Fact 2019-03-13