64 10.17 Voting Agreement dated January 7, 2021, by and among Earthstone Energy, Inc., EnCap Investments L.P., Warburg Pincus Private Equity (E&P) XI – A, L.P., Warburg Pincus XI (E&P) Partners – A, L.P., WP IRH Holdings, L.P., Warburg Pincus XI (E&P) Partners – B IRH, LLC, Warburg Pincus Energy (E&P)-A, LP, Warburg Pincus Energy (E&P) Partners-A, LP, Warburg Pincus Energy (E&P) Partners-B IRH, LLC, WP Energy Partners IRH Holdings, L.P., and WP Energy IRH Holdings, L.P. 8-K 001-35049 10.2 January 13, 2021 10.18 Lock-up Agreement dated January 7, 2021, by and among Earthstone Energy, Inc., Warburg Pincus Private Equity (E&P) XI – A, L.P., Warburg Pincus XI (E&P) Partners – A, L.P., WP IRH Holdings, L.P., Warburg Pincus XI (E&P) Partners – B IRH, LLC, Warburg Pincus Energy (E&P)-A, LP, Warburg Pincus Energy (E&P) Partners-A, LP, Warburg Pincus Energy (E&P) Partners-B IRH, LLC, WP Energy Partners IRH Holdings, L.P., and WP Energy IRH Holdings, L.P. 8-K 001-35049 10.3 January 13, 2021 10.19† Form of Performance Unit Agreement (Executive Management). 8-K 001-35049 10.1 January 29, 2021 14.1 Code of Business Conduct and Ethics. 8-K 001-35049 14 January 13, 2021 21.1 List of Subsidiaries. X 23.1 Consent of Cawley, Gillespie & Associates, Inc. X 23.2 Consent of Moss Adams LLP. X 31.1 Certification of the Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act. X 31.2 Certification of the Principal Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act. X 32.1 Certification of the Chief Executive Officer pursuant to Section 906 of the Sarbanes- Oxley Act. X 32.2 Certification of the Executive Vice President - Accounting and Administration pursuant to Section 906 of the Sarbanes-Oxley Act. X 99.1 Report of Cawley, Gillespie & Associates, Inc. X 101.INS XBRL Instance Document. X 101.SCH XBRL Schema Document. X 101.CAL XBRL Calculation Linkbase Document. X 101.DEF XBRL Definition Linkbase Document. X 101.LAB XBRL Label Linkbase Document. X 101.PRE XBRL Presentation Linkbase Document. X 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). X † Indicates management contract or compensatory plan or arrangement.