FS Specialty Lending Fund

GENERAL

This proxy statement is furnished in connection with the solicitation of proxies by the board of trustees (the “Board”) of FS Specialty Lending Fund, a Delaware statutory trust (the “Fund”), for use at the 2026 Annual Meeting of Shareholders of the Fund to be held at 1:00 p.m., Eastern Time, on August 3, 2026, at 3025 JFK Boulevard, Philadelphia, Pennsylvania 19104, and any adjournments or postponements thereof (the “Annual Meeting”). This proxy statement and the accompanying materials are being mailed on or about June 10, 2026 to shareholders of record described below and are available atwww.proxyvote.com.

All properly executed proxies representing common shares of beneficial interest, par value $0.001 per share (the “Common Shares”), received prior to the Annual Meeting will be voted in accordance with the instructions marked thereon. If no specification is made, the Shares will be voted FOR the proposal to:

(i)

elect the following individuals as Class I Trustees, each of whom has been nominated for election for a three-year term expiring at the 2029 annual meeting of shareholders: (a) Charles P. Pizzi and (b) Pedro A. Ramos (the “Trustee Election Proposal”).

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Any shareholder who has given a proxy has the right to revoke it at any time prior to its exercise. Any shareholder who executes a proxy may revoke it with respect to any proposal by attending the Annual Meeting and voting his or her Shares in person, or by submitting a letter of revocation or a later-dated proxy to the Fund at the above address prior to the date of the Annual Meeting.