Second Supplemental Indenture, dated as of September 12, 2023, among Crescent Energy Finance LLC, the guarantors named therein, and U.S. Bank Trust Company, National Association, as trustee

Exhibit 4.3

SECOND SUPPLEMENTAL INDENTURE (this “Second Supplemental Indenture”), dated as of September 12, 2023, by and among Crescent Energy Finance LLC, a Delaware limited liability company (the “Issuer”), the Guarantors party hereto (the “Guarantors”) and U.S. Bank Trust Company, National Association, a national banking association, as trustee (the “Trustee”).

W I T N E S S E T H

WHEREAS, each of the Issuer and the Guarantors (as defined in the Indenture referred to below) has heretofore executed and delivered to the Trustee an indenture, dated as of February 1, 2023 (the “Base Indenture”), providing for the issuance of 9.250% Senior Notes due 2028 (the “Original 2028 Notes”), as supplemented by the first supplemental indenture, dated as of July 20, 2023 (the “First Supplemental Indenture” and, together with the Base Indenture, the “Indenture”) providing for the additional issuance of 9.250% Senior Notes due 2028 (the “Additional 2028 Notes” and, together with the Original 2028 Notes, the “Existing 2028 Notes”);

WHEREAS, Section 2.01(d) of the Indenture provides that Additional Notes ranking pari passu with the Existing 2028 Notes may be created and issued from time to time by the Issuer (subject to the Issuer’s compliance with Section 4.09 of the Indenture) without notice to or consent of the Holders and shall be consolidated with and form a single class with the Existing 2028 Notes and shall have the same terms as to status, redemption or otherwise as the Existing 2028 Notes; and

WHEREAS, the Issuer and the Guarantors desire to execute and deliver this Second Supplemental Indenture for the purpose of issuing $150,000,000 in aggregate principal amount of additional notes, having terms substantially identical in all material respects to the Existing 2028 Notes (the “Additional Notes” and, together with the Existing 2028 Notes, the “Notes”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Second Supplemental Indenture.

NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

(1)    Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

(2)    Additional Notes. As of the date hereof, the Issuer will issue, and the Trustee is directed to authenticate and deliver, the Additional Notes under the Indenture having the same terms as the Existing 2028 Notes, except that interest on the Additional Notes will accrue from August 15, 2023 and the first interest payment date shall be February 15, 2024. The Existing 2028 Notes and the Additional Notes shall be treated as a single class for all purposes under the Indenture. Copies of the Global Notes representing the Additional Notes are attached hereto as Exhibit A.

(3)    Governing Law. THIS SECOND SUPPLEMENTAL INDENTURE WILL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

(4)    Counterparts. The parties may sign any number of copies of this Second Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. This Second Supplemental Indenture may be executed in multiple counterparts, which, when taken together, shall constitute one instrument. The exchange of copies of this Second Supplemental

Indenture and of signature pages by facsimile or electronic (by ‘.pdf’ or other format) transmissions shall constitute effective execution and delivery of this Second Supplemental Indenture as to the parties hereto and may be used in lieu of the original Second Supplemental Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or electronically (by ‘.pdf’ or other format) shall be deemed to be their original signatures for all purposes.

(5)    Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

(6)    The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Second Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Issuer and the Guarantors.

(7)    Continued Effect. Except as expressly supplemented and amended by this Second Supplemental Indenture, the Indenture shall continue in full force and effect in accordance with the provisions thereof, and the Indenture (as supplemented and amended by this Second Supplemental Indenture) is in all respects hereby ratified and confirmed. This Second Supplemental Indenture and all the terms and conditions of this Second Supplemental Indenture, with respect to the Notes, shall be and be deemed to be part of the terms and conditions of the Indenture for any and all purposes.

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IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed, all as of the date first above written.

Very truly yours,

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IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed, all as of the date first above written.

The following entities, each as a Guarantor: