X0306 4 2021-01-20 0 0001694028 Liberty Oilfield Services Inc. LBRT 0001705066 Stock Michael 950 17TH ST. SUITE 2400 DENVER CO 80202 0 1 0 0 Chief Financial Officer Class A common stock 2021-01-20 4 A 0 65091 A 1483068 D Represents restricted stock units granted on January 20, 2021, which vest in three equal installments on April 1, 2022, 2023 and 2024, subject to continued employment. Each restricted stock unit represents a contingent right to receive one share of Liberty Oilfield Services Inc. Class A common stock following vesting. /s/ R. Sean Elliott, attorney-in-fact for Michael Stock 2021-01-22