Blackstone Secured Lending Fund (BXSL) 424B2Prospectus for primary offering

Calculated in accordance with Rule 457(o), based on the proposed maximum aggregate offering price, and Rule 457(r) under the Securities Act of 1933, as amended (the “Securities Act”).

The Registrant previously paid $22,040.00 in connection with the filing on March 3, 2023 of the Registrant’s prospectus supplement to the prospectus included in its Registration Statement on Form N-2 (File No. 333-266323) related to the Registrant’s offer and sale from time to time of its common shares of beneficial interest, par value $0.001 per share (“Shares”), having an aggregate gross sales price of up to $200.0 million under an at-the-market program (the “ATM Program”). In connection with this prospectus supplement, the maximum aggregate offering price of the Shares under the ATM Program is being increased from $200.0 million to $400.0 million.