X0306 4 2019-05-22 0 0001748773 RATTLER MIDSTREAM LP RTLR 0001758934 VIVAR ARTURO 500 WEST TEXAS AVENUE, SUITE 1200 MIDLAND TX 79701 1 0 0 0 Common units representing limited partner interests 2019-05-22 4 A 0 5714 0.00 A 5714 D Common units representing limited partner interests 2019-05-28 4 P 0 14250 17.50 A 19964 D On May 22, 2019, the reporting person was granted 5,714 phantom units under the Rattler Midstream LP Long-Term Incentive Plan, which will vest on May 22, 2020. Upon vesting, each phantom unit entitles the recipient to one common unit representing a limited partner interest in the Issuer. On May 28, 2019, the reporting person purchased the common units through the Directed Unit Program conducted in connection with the Issuer's initial public offering. /s/ Teresa L. Dick as attorney-in-fact for Arturo Vivar 2019-05-29