Sixth Street Specialty Lending, Inc. Prices Public Offering of $350.0 million 6.125% Unsecured Notes due 2029

Sixth Street Specialty Lending, Inc. (NYSE:TSLX) (“TSLX” or the “Company”) announced today that it has priced an underwritten public offering of $350.0 million in aggregate principal amount of 6.125% notes due 2029. The notes will mature on March 1, 2029 and may be redeemed in whole or in part at TSLX’s option at any time at par plus a “make-whole” premium, if applicable.

TSLX expects to use the net proceeds of the offering to pay down outstanding debt under its revolving credit facility. However, through re-borrowing under the revolving credit facility, TSLX intends to make new investments in accordance with its investment objectives and strategies outlined in the preliminary prospectus supplement and the accompanying prospectus described below in greater detail.

In connection with the offering, TSLX intends to enter into an interest rate swap to better align the interest rates of its liabilities with its investment portfolio, which consists of predominately floating rate loans.

BofA Securities, Goldman Sachs & Co. LLC, J.P. Morgan and SMBC Nikko are acting as joint book-running managers for this offering. Morgan Stanley, RBC Capital Markets, HSBC, Wells Fargo Securities, Citigroup, Truist Securities, Mizuho and MUFG are also acting as book-running managers for this offering. Keefe, Bruyette & Woods, A Stifel Company, Oppenheimer & Co., ICBC Standard Bank, Raymond James, B. Riley Securities, Citizens Capital Markets, Hovde Group, LLC, Ladenburg Thalmann and R. Seelaus & Co., LLC are acting as co-managers for this offering. The offering is expected to close on January 16, 2024, subject to customary closing conditions.

Investors are advised to carefully consider the investment objectives, risks, charges and expenses of the Company before investing. The pricing term sheet dated January 8, 2024, the preliminary prospectus supplement dated January 8, 2024 and the accompanying prospectus dated December 22, 2023, each of which have been or will be filed with the Securities and Exchange Commission (“SEC”), contain this and other information about the Company and should be read carefully before investing.

The information in the pricing term sheet, the preliminary prospectus supplement, the accompanying prospectus and this press release is not complete and may be changed. The pricing term sheet, the preliminary prospectus supplement, the accompanying prospectus and this press release are not offers to sell any securities of TSLX and are not soliciting an offer to buy such securities in any state or jurisdiction where such offer and sale is not permitted.