X0306 4 2019-02-22 0 0001539838 Diamondback Energy, Inc. FANG 0001728310 Soliman Jennifer 500 WEST TEXAS AVENUE, SUITE 1200 MIDLAND TX 79701 0 1 0 0 Sr. VP and Chief HR Officer Common Stock 2019-02-22 4 F 0 185 102.14 D 1373 D The issuer withheld shares of common stock that would have otherwise been issuable to the reporting person to satisfy the issuer's tax withholding obligations in connection with the vesting and settlement on February 22, 2019 of the second tranche of the time-based restricted stock units granted to the reporting person on February 13, 2018. The number of shares of common stock withheld was determined based on the closing price per share of the issuer's common stock on February 22, 2019. /s/Teresa L. Dick, as attorney-in-fact for Jennifer Soliman 2019-02-25