0001193125-25-035142 Sample Contracts

SIXTH STREET SPECIALTY LENDING, INC. (a Delaware corporation) Underwriting Agreement
Underwriting Agreement • February 25th, 2025 • Sixth Street Specialty Lending, Inc. • New York

Sixth Street Specialty Lending, Inc., a Delaware corporation (the “Company”), proposes, subject to the terms and conditions stated herein, to issue and sell to the several Underwriters listed in Schedule 1 hereto (the “Underwriters”), for whom BofA Securities, Inc. is acting as representative (in such capacity, the “Representative”), $300,000,000 aggregate principal amount of 5.625% Notes due 2030 of the Company (the “Securities”).

SECOND SUPPLEMENTAL INDENTURE between SIXTH STREET SPECIALTY LENDING, INC. and as Trustee Dated as of February 25, 2025 SECOND SUPPLEMENTAL INDENTURE
Second Supplemental Indenture • February 25th, 2025 • Sixth Street Specialty Lending, Inc.

THIS SECOND SUPPLEMENTAL INDENTURE (this “Second Supplemental Indenture”), dated as of February 25, 2025, between Sixth Street Specialty Lending, Inc., a Delaware corporation (the “Company”), and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”). All capitalized terms used herein shall have the meaning set forth in the Base Indenture (as defined below) unless otherwise defined herein.