First Supplemental Indenture relating to Nationstar Mortgage Holdings Inc.s 6.000% Senior Notes due 2027, dated as of January 16, 2020, among Nationstar Mortgage Holdings Inc. as issuer, Mr. Cooper Group Inc. as parent guarantor, the guarantors thereto and Computershare Trust Company, N.A. (f/k/a Wells Fargo Bank, National Association), as trustee

Exhibit 4.3

FIRST SUPPLEMENTAL INDENTURE

FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of August 1, 2023, by HPC Insurance Agency, LLC, a Michigan limited liability company (the “Guaranteeing Subsidiary”), a subsidiary of the Issuer.

W I T N E S S E T H

WHEREAS, the Issuer and Guarantors have heretofore executed and delivered to Computershare Trust Company, N.A. (f/k/a Wells Fargo Bank, National Association), as trustee (the “Trustee”), an indenture (as heretofore amended and supplemented, the “Indenture”), dated as of January 16, 2020, providing for the issuance of $600,000,000 aggregate principal amount of 6.000% Senior Notes Due 2027 (the “Notes”); and

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Guarantee”).

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary covenants and agrees for the equal and ratable benefit of the Holders as follows:

1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Indenture including but not limited to Article Twelve thereof.

3. EXECUTION AND DELIVERY. The Guaranteeing Subsidiary agrees that the Guarantee shall remain in full force and effect notwithstanding the absence of the endorsement of any notation of such Guarantee on the Notes.

4. NO RECOURSE AGAINST OTHERS. No past, present or future director, officer, employee, incorporator, stockholder or agent of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Issuer or any Guaranteeing Subsidiary under the Notes, any Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy.

5. GOVERNING LAW. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. THE PARTY HERETO AGREES TO SUBMIT TO THE JURISDICTION OF ANY UNITED STATES FEDERAL OR STATE COURT LOCATED IN THE BOROUGH OF MANHATTAN, IN THE CITY OF NEW YORK IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS SUPPLEMENTAL INDENTURE.

6. COUNTERPARTS. The party may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. The exchange of copies of the Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of the Supplemental Indenture as to the party hereto and may be used in lieu of the original Supplemental Indenture for all purposes. Signatures of the party hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes.

7. EFFECT OF HEADINGS. The Section headings herein are for convenience or reference only and are not intended to be considered a part hereof and shall not affect the construction hereof.

8. THE TRUSTEE. The Trustee is an express and intended third party beneficiary hereof and is entitled to the rights and benefits hereunder and may enforce this Supplemental Indenture as if it were a party hereto. This provision cannot be amended without the consent of the Trustee.

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

[6.000% Senior Notes due 2027 Notes – First Supplemental Indenture]