TSLX · Sixth Street Specialty Lending, Inc.

Sixth Street Specialty Lending, Inc. entered into a Third Supplemental Indenture on May 14, 2026, with U.S. Bank Trust Company, National Association, supplementing the January 16, 2024 Base Indenture to issue $300 million aggregate principal amount of 5.650% unsecured senior notes due August 15, 2031. This direct unsecured obligation bears interest at 5.650% payable semiannually on February 15 and August 15, commencing February 15, 2027. The notes are redeemable at the company's option at any time prior to the July 15, 2031 par call date at the greater of par or the present value of remaining payments discounted at the Treasury Rate plus 30 basis points, plus accrued interest; thereafter at par plus accrued interest. The indenture includes covenants requiring compliance with Section 18(a)(1)(A) of the Investment Company Act as modified by Section 61(a), subject to SEC exemptive relief, and ongoing financial reporting to noteholders if the company ceases Exchange Act reporting. A change of control repurchase event, defined as a change of control combined with a below investment grade rating from specified agencies, obligates the company to offer to repurchase notes at 100% of principal plus accrued interest. Proceeds will refinance revolving credit facility debt and support general corporate purposes, including portfolio investments aligned with the BDC's objectives. The offering closed on May 14, 2026, pursuant to a shelf registration, with underwriting by BofA Securities, Inc. and others under a May 7 agreement. This capital raise extends and diversifies the company's debt maturity profile while providing liquidity for operations and growth.