UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

______________________

FORM 8-K

______________________

CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 24, 2026

______________________

Blackstone Secured Lending Fund
(Exact name of Registrant as specified in its charter)

______________________

345 Park Avenue
New York, New York 10154
(Address of principal executive offices and zip code)

(212) 503-2100
(Registrant’s telephone number, including area code)

N/A
(Former name or former address, if changed since last report)

______________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.07.       Submission of Matters to a Vote of Security Holders.

On September 24, 2026, Blackstone Secured Lending Fund (the “Company”) held its 2026 Annual Meeting of Shareholders (the “Annual Meeting”). Because 161,674,427 shares of the Company’s common shares of beneficial interest, or approximately 69.49% of the 232,652,003 total shares of the Company’s common shares entitled to vote at the Annual Meeting, were present in person or by proxy, a quorum was present at the meeting, as required by the Company’s Fourth Amended and Restated Agreement and Declaration of Trust. Below are the final voting results for the following two proposals submitted to the Company’s shareholders, each of which is described in more detail in the Company’s definitive proxy statement for the Annual Meeting, dated June 29, 2026, filed with the Securities and Exchange Commission.

Proposal 1 — Election of Trustees

The following two individuals were elected as Class II trustees for the Company’s Board of Trustees to serve as trustees until the Company’s 2029 Annual Meeting of Shareholders and until such trustee’s successor is duly elected and qualified.

Proposal 2 — Ratification of the Appointment of Deloitte & Touche LLP as the Company’s Independent Registered Public Accounting Firm for the Fiscal Year Ending December 31, 2026

The Company’s shareholders ratified the appointment of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.