Form 8-K Blackstone Secured Lendi For: Jun 15

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

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FORM 8-K

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

Date of Report (Date of earliest event reported): June 15, 2026

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

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

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

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

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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 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2):

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 5.02 — Departure of Certain Officers.

On June 15, 2026, Katherine Rubenstein departed her role as Blackstone Secured Lending Fund’s (the “Fund”) Chief Operating Officer to pursue other opportunities. Her departure was not the result of any disagreement relating to Blackstone or the Fund’s operations, policies or practices. Blackstone Credit & Insurance is grateful for Ms. Rubenstein’s contributions to the Fund and wishes her the very best in her next chapter.

SIGNATURE

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.