UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date:	July 11, 2019 4:00 P.M.

Form:	S-4
CIK: 0001539838 Company Name: Diamondback Energy, Inc. File Number: 333-230446
CIK: 0001771381 Company Name: EGN Services, Inc. File Number: 333-230446-05
CIK: 0001771397 Company Name: Energen Resources Corp File Number: 333-230446-04
CIK: 0000277595 Company Name: ENERGEN CORP File Number: 333-230446-03
CIK: 0001590692 Company Name: Diamondback Energy E&P LLC File Number: 333-230446-02
CIK: 0001590696 Company Name: Diamondback Energy O&G LLC File Number: 333-230446-01