Sixth Street Specialty Lending, Inc.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On February 1

of this Current Report on Form 8-K, including Exhibit 99.1 furnished herewith, is being furnished and shall not be deemed “filed” for any purpose of Section 18

Other Events. Sixth Street Specialty Lending Advisers, LLC, a Delaware limited liability company (the “Adviser”), is our investment adviser. Robert “Bo” Stanley

Financial Statements and Exhibits. (d) Exhibits: Exhibit Number Description 99.1 Letter of Robert (“Bo”) Stanley, dated February 23, 2026. 104 Cover Page Intera