Revised Proxy Soliciting Materials (Form DEFR14A)

Preliminary Proxy Statement

Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

Definitive Proxy Statement

Definitive Additional Materials

Soliciting Material under §240.14a-12

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Fee paid previously with preliminary materials

Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

Name of Individual or Identity of Group

Directors and Executive Officers:

Interested Directors

Joshua Easterly⁽¹⁾

Michael Fishman (Director Nominee)⁽²⁾

Jennifer Gordon

Robert ("Bo") Stanley (Director Nominee)⁽³⁾

David Stiepleman⁽⁴⁾

Independent Directors

Hurley Doddy (Director Nominee)

John D. Hershey

Richard Higginbotham

Judy Slotkin

Ronald Tanemura

P. Emery Covington

Named Executive Officers Who Are Not Directors

Ian Simmonds

Michael Graf

Anton Brett

All Directors and Officers as a Group (18 persons)⁽⁵⁾⁽⁶⁾

Represents less than 0.1%.

18,792 shares of common stock beneficially owned by Mr. Easterly have been pledged as security in connection with a line of credit with a third party financial institution unaffiliated with the Company and are held indirectly through entities for which Mr. Easterly has pass through voting power and no dispositive power. On February 19, 2026, pursuant to the Third Amended and Restated Bylaws of the Company, Joshua Easterly informed the Company of his intention to retire from the Board, effective as of the close of business on May 21, 2026. Accordingly, Mr. Easterly will not run for re-election to the Board at the Meeting. Mr. Easterly's decision was not a result of any disagreement with the Company on any matter relating to the Company's operations, policies or practices.

All 36,366 shares of common stock beneficially owned by Mr. Fishman have been pledged as security in connection with a line of credit with a third party financial institution unaffiliated with the Company and are held indirectly through entities for which Mr. Fishman has pass through voting power and no dispositive power.

3,907 shares of common stock beneficially owned by Mr. Stanley have been pledged as security in connection with a line of credit with a third party financial institution unaffiliated with the Company and are held indirectly through entities for which Mr. Stanley has pass through voting power and no dispositive power.

5,544 shares of common stock beneficially owned by Mr. Stiepleman have been pledged as security in connection with a line of credit with a third party financial institution unaffiliated with the Company and are held indirectly through entities for which Mr. Stiepleman has pass through voting power and no dispositive power.

Includes shares owned by executive officers that are not "Named Executive Officers," already presented by name in the table above. 64,609 shares of common stock beneficially owned by these other executive officers have been pledged as security in connection with lines of credit with a third party financial institution unaffiliated with the Company.

Sixth Street Specialty Lending Advisers, LLC (the "Adviser") holds 2,714,226 shares of common stock (the "Sixth Street Specialty Lending Advisers Shares"). The Adviser is managed by Sixth Street Specialty Lending Advisers Holdings, LLC, a Delaware limited liability company, the sole member of the Adviser. Sixth Street Specialty Lending Advisers Holdings, LLC is managed by TSSP Holdco Management, LLC, which is managed by a board of directors, which is currently comprised of Alan Waxman. Mr. Waxman is the CEO of TSSP Holdco Management, LLC. Mr. Waxman disclaims beneficial ownership of the Sixth Street Specialty Lending Advisers Shares except to the extent of his pecuniary interest therein.