Sixth Street Lending Partners

Item 1.01 - Entry into a Material Definitive Agreement Indenture and Supplemental Indenture On September 21, 2026, Sixth Street Lending Partners (the “Company”) and U.S. Bank Trust Company, National Association (the “Trustee”), entered into a Fifth Supplemental Indenture (the “Fifth Supplemental Indenture”) to the Indenture, dated as of March 11, 2024, between the Company and the Trustee (the “Base Indenture”; and together with the Fifth Supplemental Indenture, the “Indenture”), relating to the Company’s issuance, offer and sale of $750,000,000 aggregate principal amount of its 6.500% notes due 2031 (the “Notes”). The Notes were offered to persons reasonably believed to be qualified institutional buyers in accordance with Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”), and to non-U.S. persons in transactions outside the United States in reliance on Regulation S under the Securities Act. The Notes have not been registered under the Securities Act or any state securities laws and may not be offered or sold in the United States absent registration or an applicable exemption from such registration requirements. The transaction closed on September 21, 2026. The Notes will mature on December 15, 2031, and may be redeemed in whole or in part at the Company’s option at any time at the redemption prices set forth in the Fifth Supplemental Indenture. The Notes bear interest at a rate of 6.500% per year payable semiannually on June 15 and December 15 of each year, commencing on December 15, 2026. The Notes are direct unsecured obligations of the Company. The Company expects to use the net proceeds of this offering to pay down a portion of the outstanding indebtedness on its revolving credit facility and/or its subscription facility, and for general corporate purposes. The Indenture contains certain covenants including covenants requiring the Company to comply with Section 18(a)(1)(A) as modified by Section 61(a) of the Investment Company Act of 1940, as amended, or any successor provisions, but giving effect, in either case, to any exemptive relief granted to the Company by the Securities and Exchange Commission (the “SEC”), and to provide financial information to the holders of the Notes and the Trustee if the Company should no longer be subject to the reporting requirements under the Securities Exchange Act of 1934, as amended. These covenants are subject to important limitations and exceptions that are described in the Indenture. In addition, upon the occurrence of a change of control repurchase event (which involves the occurrence of both a change of control and a below investment grade rating of the Notes by each of Fitch Ratings, Inc., Moody’s Investor Service and S&P Global Ratings), the Company will be required to make an offer to purchase the Notes at a price equal to 100% of the principal amount plus accrued and unpaid interest to the date of purchase. The foregoing descriptions of the Base Indenture, Fifth Supplemental Indenture and the Notes do not purport to be complete and are qualified in their entirety by reference to the full text of the Base Indenture, Fifth Supplemental Indenture and the Notes, respectively, each filed as an exhibit hereto and incorporated by reference herein. Registration Rights Agreement In connection with the offering of the Notes, the Company entered into a Registration Rights Agreement, dated as of September 21, 2026 (the “Registration Rights Agreement”), with BofA Securities, Inc., as representative of the several initial purchasers of the Notes. Pursuant to the Registration Rights Agreement, the Company is obligated to file with the SEC a registration statement relating to an offer to exchange the Notes for new notes issued by the Company that are registered under the Securities Act and otherwise have terms substantially identical to those of the Notes, and to use its commercially reasonable efforts to cause such registration statement to be declared effective by the SEC under the Securities Act. The Company has agreed to use its commercially reasonable efforts to consummate such exchange offer on the earliest practicable date after such registration statement has been declared effective but in no event later than 365 days after the initial issuance of the Notes. If the Company is not able to effect the exchange offer, the Company will be obligated to file a shelf registration statement covering the resale of the Notes and use its commercially reasonable efforts to cause such registration statement to be declared effective. If the Company fails to satisfy its registration obligations by certain dates specified in the Registration Rights Agreement, it will be required to pay additional interest to the holders of the Notes. The foregoing description of the Registration Rights Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Registration Rights Agreement, filed as an exhibit hereto and incorporated by reference herein.

Item 2.03 - Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant The information set forth under Item 1.01 of this Form 8-K is incorporated herein by reference.