This Fourth Supplemental Indenture, dated as of November 1, 2023 (this
Fourth Supplemental Indenture), is among Earthstone Operating, LLC, a Texas limited liability company, Earthstone Permian LLC, a Texas limited liability company, Sabine River Energy, LLC, a Texas limited liability company,
Independence Resources Technologies, LLC, a Delaware limited liability company, Earthstone Oil & Gas Holdings, LLC, a Delaware limited liability company, Earthstone Oil & Gas Texas, LLC, a Delaware limited liability company,
Earthstone Oil & Gas Northern Delaware, LLC, a Delaware limited liability company, Earthstone Energy Assets, LLC, a Delaware limited liability company, Earthstone Energy Operating, LLC, a Delaware limited liability company (collectively,
the Additional Subsidiary Guarantors), Permian Resources Operating, LLC (as successor in interest to Centennial Resource Production, LLC), a Delaware limited liability company (together with its successors and assigns, the
Company), each other existing guarantor (the Existing Guarantors, and together with the Additional Subsidiary Guarantors, the Guarantors) under the Indenture (as defined below), and UMB Bank,
N.A., as trustee (the Trustee), under the Indenture.
W I T N E S S E T H:
WHEREAS, the Company and the Trustee have heretofore executed and delivered an Indenture, dated as of November 30, 2017 (the
Base Indenture), by and among the Company, the Guarantors party thereto and the Trustee, providing for the issuance and establishing the terms of the Companys 5.375% Senior Notes due 2026 (the Notes);
WHEREAS, Permian Resources Corporation (as successor in interest to Centennial Resource Development, Inc.), a Delaware corporation (the
Parent), and the Trustee have heretofore executed and delivered that certain First Supplemental Indenture, dated as of May 22, 2020 (the First Supplemental Indenture), which supplemented the Base Indenture,
pursuant to which the Parent unconditionally guaranteed, on a joint and several basis with the other Guarantors, the Guaranteed Obligations, and Parent and the Trustee have heretofore executed and delivered that certain Second Supplemental
Indenture, dated as of September 1, 2022 (the Second Supplemental Indenture) and that certain Third Supplemental Indenture, dated as of September 5, 2023 (the Third Supplemental Indenture), which
supplemented the Base Indenture (the Base Indenture, as so supplemented by the First Supplemental Indenture, Second Supplemental Indenture and the Third Supplemental Indenture, the Indenture), pursuant to which the New Subsidiary
Guarantors (as such term is defined therein) unconditionally guaranteed, on a joint and several basis with the other Guarantors, the Guaranteed Obligations;
WHEREAS, on the date hereof, pursuant to an Agreement and Plan of Merger, dated as of August 21, 2023, among the Company, Parent, Smits
Merger Sub I Inc., a Delaware corporation and a direct wholly owned subsidiary of Parent (Merger Sub I), Smits Merger Sub II LLC, a Delaware limited liability company and a direct wholly owned subsidiary of Parent (Merger
Sub II), Earthstone Energy, Inc., a Delaware corporation (Earthstone) and Earthstone Energy Holdings, LLC, a Delaware limited liability company (Earthstone OpCo), pursuant to which (i) Merger Sub
I merged with and into Earthstone (the Initial Company Merger), with Earthstone surviving the Initial Company Merger as a wholly owned subsidiary of Parent (the Initial Surviving Corporation), (ii) following the
Initial Company Merger, the Initial Surviving Corporation merged with and into Merger Sub II (the Subsequent Company Merger and, together with the Initial Company Merger, the Company Mergers), with Merger Sub II
surviving the Subsequent Company Merger as a wholly owned subsidiary of Parent, and (iii) following the Company Mergers, Earthstone OpCo merged with and into the Company (the OpCo Merger,), with the Company surviving the OpCo
Merger;