Material Agreement (Form 8-K)

Item 1.01 - Entry into a Material Definitive Agreement

On March 4, 2025, Sixth Street Specialty Lending, Inc. (the "Company") entered into a sixteenth amendment to the Company's second amended and restated senior secured revolving credit facility, dated February 27, 2014 (as amended, the "Revolving Credit Facility"), which, among other changes, (a) extends the termination of the revolving period on $1.525 billion of commitments to March 2, 2029 and the stated maturity date to March 4, 2030 and (b) increases the uncommitted accordion that allows the Company, under certain circumstances, to increase the size of the facility, from up to $2.0 billion to up to $2.5 billion. The foregoing description is only a summary of certain of the provisions of the Revolving Credit Facility and is qualified in its entirety by the underlying agreement, which will be filed as an exhibit to the Company's next Quarterly Report on Form 10-Q.

Item 2.03 - Creation of a Direct Financial Obligation