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.

Change of Adviser and Appointment of Sub-Adviser

On November 7, 2024, the Board of the Company approved the Adviser’s assignment of the Investment Advisory Agreement to Blackstone Private Credit Strategies LLC (the“New Adviser”) pursuant to Rule 2a-6 under the 1940 Act, effective January 1, 2025. The Board also approved the second amended and restated investment advisory agreement (the“Second A&R Investment Advisory Agreement”) to acknowledge such assignment. Accordingly, effective January 1, 2025, the New Adviser will become the Company’s investment adviser pursuant to the Second A&R Investment Advisory Agreement.

Further, on November 7, 2024, the Board approved a sub-advisory agreement (the“Sub-Advisory Agreement”) between the Company, the New Adviser and Blackstone Credit BDC Advisors LLC (in such capacity, the“Sub-Adviser”). Accordingly, effective January 1, 2025, the Sub-Adviser will become the Company’s investment sub-adviser pursuant to the Sub-Advisory Agreement. These changes are the result of a reorganization of certain subsidiaries of Blackstone Inc. and will not result in any change in the aggregate fees paid by the Company. Further, the nature and level of services provided to the Company will remain the same, as will the personnel that provide investment management services to the Company on behalf of the New Adviser or the Sub-Adviser.

Change of Administrator and Appointment of New Sub-Administrator

On November 7, 2024, the Board of the Company approved the termination of the Administration Agreement, effective December 31, 2024, and a new administration agreement (the“New Administration Agreement”) between the Company and Blackstone Private Credit Strategies LLC (in such capacity, the“New Administrator”), effective January 1, 2025. Accordingly, effective January 1, 2025, the New Administrator will become the Company’s administrator pursuant to the New Administration Agreement.

Further, on November 7, 2024, the Board approved a sub-administration agreement (the“New Sub-Administration Agreement”) between the New Administrator, on behalf of the Company, and Blackstone Alternative Credit Advisors LP. Accordingly, effective January 1, 2025, Blackstone Alternative Credit Advisors LP will become one of the Company’s sub-administrators pursuant to the New Sub-Administration Agreement. To acknowledge the change of the administrator, the Board also approved the assignment of the Sub-Administration Agreement with State Street Bank and Trust Company from Blackstone Alternative Credit Advisors LP to the New Administrator, effective January 1, 2025.

These changes will not result in any change in the aggregate fees paid by the Company. Further, the nature and level of services provided to the Company will remain the same, as will the personnel that provide administrative services to the Company on behalf of the New Administrator or Blackstone Alternative Credit Advisors LP.