This SERIES 2023-FTL1 INDENTURE SUPPLEMENT AND LOAN AGREEMENT (this Indenture
Supplement), dated as of May 25, 2023, is made by and among PMT ISSUER TRUSTFMSR, a statutory trust organized under the laws of the State of Delaware, as issuer (the Issuer), CITIBANK, N.A., a national banking
association, as indenture trustee (in such capacity, the Indenture Trustee), as calculation agent (in such capacity, the Calculation Agent), as paying agent (in such capacity, the Paying
Agent) and as securities intermediary (in such capacity, the Securities Intermediary), PENNYMAC CORP., a corporation organized under the laws of the State of Delaware (PMC), as administrator (in such
capacity, the Administrator) and servicer (in such capacity, the Servicer), and ATLAS SECURITIZED PRODUCTS, L.P. (ASP), a Delaware limited partnership, as administrative agent (the
Administrative Agent), and the Lenders (as defined herein). This Indenture Supplement relates to and is executed pursuant to that certain Base Indenture, dated as of December 20, 2017, including the schedules and exhibits
thereto (as supplemented hereby, as amended by Amendment No. 1, dated as of April 25, 2018, Amendment No. 2, dated as of July 31, 2020, Amendment No. 3, dated as of October 20, 2020, Amendment No. 4, dated as of
March 30, 2021, Amendment No. 5, dated as of June 28, 2022, and Amendment No. 6, dated as of May 25, 2023, and as may be further amended, restated, supplemented or otherwise modified from time to time, the Base
Indenture and together with this Indenture Supplement, the Indenture), among the Issuer, the Servicer, the Administrator, the Indenture Trustee, the Calculation Agent, the Paying Agent, the Securities Intermediary, ASP,
as Administrative Agent, and the Administrative Agents from time to time parties thereto, all the provisions of which are incorporated herein as modified hereby and shall be a part of this Indenture Supplement as if set forth herein in
full.
Capitalized terms used and not otherwise defined herein shall have the respective meanings given them in the Base Indenture, and the
rules of interpretation set forth in Section 1.2 of the Base Indenture shall apply equally herein.
PRELIMINARY STATEMENT
WHEREAS, the Lenders desire to loan funds to the Issuer pursuant to the terms of this Indenture Supplement;
WHEREAS, the Issuer desires to borrow funds from the Lenders on the terms and conditions set forth in this Indenture Supplement and the
Base Indenture;
WHEREAS, to evidence each aforementioned lending arrangement (the Series 2023-FTL1 Loan) in the
form of a promissory note, the Lenders have requested and the Issuer has duly authorized the issuance of a Series of Term Notes, the Series 2023-FTL1 Promissory Term Notes (as defined below). The parties are entering into this Indenture Supplement
to document the terms of the issuance of the Series 2023-FTL1 Promissory Term Notes pursuant to the Base Indenture, which provides for the issuance of Notes in multiple series from time to time; and
WHEREAS, the Lenders are also Noteholders and the Series 2023-FTL1 Promissory Term Notes are also Notes, and more specifically, a
Series of Term Notes, as such terms are defined in the Base Indenture and shall be afforded the rights as set forth in the Base Indenture, including as such rights relate to the other Noteholders as described therein.