Sixth Street Specialty Lending, Inc. (NYSE: TSLX) (“TSLX” or “the Company") announced today that President Robert (“Bo”) Stanley has been appointed as Co-Chief Executive Officer of the Company, effective as of November 4, 2025. Mr. Stanley will assume the role of Co-CEO alongside existing CEO, Joshua Easterly. Mr. Easterly will continue to serve as Co-CEO until December 31, 2025, at which point Mr. Stanley will serve as the Company’s sole CEO. Mr. Easterly will remain Chairman of the Board of Directors (the “Board”).

Mr. Stanley is a Partner of Sixth Street, Co-Head of Sixth Street Direct Lending and Co-Head of Sixth Street Growth. Mr. Stanley also served as President of Sixth Street Specialty Lending, Inc. prior to his appointment to Co-CEO of both Sixth Street Specialty Lending, Inc. and Sixth Street Lending Partners. Prior to joining Sixth Street in 2011, Mr. Stanley was with Wells Fargo Capital Finance, where he served in multiple roles providing specialized financing to companies throughout the U.S. and Canada. He holds a B.S. in Business Administration with a concentration in Finance from the University of Maine.

“As an early member of the Sixth Street team, Bo possesses an unparalleled understanding of our industry and is a tremendous leader and investor,” said Mr. Easterly. “Bo and I have been working together for the better part of the past 25 years, at Sixth Street and previously at Wells Fargo. As a key member of the management team, Bo has also been a driving force in preserving and strengthening the investor first mentality that defines the Sixth Street culture.”

“It’s a privilege to be a long-term partner in our business, and I'm energized by the opportunity to serve as Co-CEO,” said Mr. Stanley. “My focus is simple: to continue executing the same disciplined strategy and uphold the investor-first culture that has defined our success from day one. We have great continuity with Ian Simmonds, Craig Hamrah, Mike Fishman, and of course the next generation of talent. I have immense confidence in our team and the platform we've built, and I look forward to driving the next chapter of value creation for our shareholders.”

On November 4, 2025, the Board of the Company increased the size of the Board from ten (10) to eleven (11) directors, and appointed Mr. Stanley as a director. Mr. Stanley’s appointment brings the total number of directors to eleven, six of whom are not “interested persons” of the Company as defined in Section 2(a)(19) of the Investment Company Act of 1940, as amended. Mr. Stanley will serve on the Company’s Board as a Class III director from November 4, 2025 until the date of the Company’s 2026 Annual Meeting of Stockholders or until his successor is duly elected and qualified.

About Sixth Street Specialty Lending

Sixth Street Specialty Lending, Inc. is a specialty finance company focused on lending to middle-market companies. The Company seeks to generate current income primarily in U.S.-domiciled middle-market companies through direct originations of senior secured loans and, to a lesser extent, originations of mezzanine loans and investments in corporate bonds and equity securities. The Company has elected to be regulated as a business development company, or a BDC, under the Investment Company Act of 1940 and the rules and regulations promulgated thereunder. The Company is externally managed by Sixth Street Specialty Lending Advisers, LLC, an affiliate of Sixth Street and a Securities and Exchange Commission (“SEC”) registered investment adviser. The Company leverages the deep investment, sector, and operating resources of Sixth Street, a global investment firm with over $115 billion in assets under management and committed capital. For more information, visit the Company’s website at https://sixthstreetspecialtylending.com.

About Sixth Street

Sixth Street is a global investment firm with over $115 billion in assets under management and committed capital. The firm uses its long-term flexible capital, data-enabled capabilities, and One Team culture to develop themes and offer solutions to companies across all stages of growth. Founded in 2009, Sixth Street has more than 730 team members including over 280 investment professionals around the world. For more information, visit https://sixthstreet.com or follow Sixth Street on LinkedIn.

Forward-Looking Statements

Statements included herein may constitute “forward-looking statements,” which relate to future events or the Company’s future performance or financial condition. These statements are not guarantees of future performance, conditions or results and involve a number of risks and uncertainties. Actual results may differ materially from those in the forward-looking statements as a result of a number of factors, including those described from time to time in the Company’s filings with the Securities and Exchange Commission. The Company assumes no obligation to update any such forward-looking statements.

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