Blackstone Secured Lending Fund

Section 13(r) Disclosure

Pursuant to Section 219 of the Iran Threat Reduction and Syria Human Rights Act of 2012, which added Section 13(r) of the Exchange Act, we hereby incorporate by reference herein Exhibit 99.1 of this report, which includes disclosures regarding activities at Mundys S.p.A., which may be, or may have been at the time considered to be, an affiliate of Blackstone and, therefore, our affiliate.

Revolving Credit Facility Amendment

On August 6, 2024, the Company entered into an amendment (the “Revolver Amendment”) to the Revolving Credit Facility, which will become effective on or around August 12, 2024, subject to the satisfaction of certain conditions including the making of specified payments, among the Company, as borrower, each of the lenders from time to time party thereto and Citibank, N.A., as administrative agent. The Revolver Amendment provides for, among other things, (a) increasing the aggregate committed principal from $1.775 billion to $2.075 billion, which is comprised of (i) revolving commitments in an aggregate amount of $1.6865 billion and (ii) funded term loans in an aggregate principal amount of $388.5 million, (b) an extension of the period during which the Company may make borrowings on the Revolving Credit Facility from June 2027 to August 2028 (other than with respect to the revolving commitments of certain lenders in the amount of $200.0 million, which expire on June 28, 2026), (c) an extension of the scheduled maturity date of the Revolving Credit Facility from June 2028 to August 2029 (other than with respect to the revolving commitments of certain lenders in the amount of $200.0 million, which mature on June 28, 2027), (d) resetting the minimum shareholders’ equity test, (e) adding a step down of the interest for the borrowings under the Revolving Credit Facility (other than with respect to borrowings of certain lenders with revolving commitments in the amount of $200.0 million) to (i) for loans for which the Company elects the base rate option, the alternate base rate plus (A) if the gross borrowing base is equal to or greater than 2.0 times the combined revolving debt amount, 0.525%, (B) if the gross borrowing base is less than 2.0 times and is equal to or greater than 1.6 times the combined revolving debt amount, 0.650% or (C) if the gross borrowing base is less than 1.6 times the combined revolving debt amount, 0.775%, and (ii) for all other loans, the applicable benchmark rate for the related Interest Period for such Borrowing plus (A) if the gross borrowing base is equal to or greater than 2.0 times the combined revolving debt amount, 1.525%, (B) if the gross borrowing base is less than 2.0 times and is equal to or greater than 1.6 times the combined revolving debt amount, 1.650% or (C) if the gross borrowing base is less than 1.6 times the combined revolving debt amount, 1.775% and (f) decreasing the unused fee for the revolving commitments (other than with respect to the revolving commitments of certain lenders in the amount of $200.0 million) from 0.375% to 0.325%.