Blackstone Secured Lending Fund — Current Report (Form 8-K)

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): May 21, 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 8.01.       Other Events.

On May 21, 2026, Blackstone Secured Lending Fund (the “Fund”) and U.S. Bank Trust Company, National Association (the “Trustee”) entered into an Eleventh Supplemental Indenture (the “Eleventh Supplemental Indenture” and, together with the Base Indenture (defined herein), the “Indenture”) related to the $650,000,000 in aggregate principal amount of its 5.900% notes due 2031 (the “Notes”), which supplements that certain Base Indenture, dated as of July 15, 2020 (as may be further amended, supplemented or otherwise modified from time to time, the “Base Indenture”).

The Notes will mature on May 21, 2031 and may be redeemed in whole or in part at the Fund’s option at any time and from time to time at the redemption prices set forth in the Indenture. The Notes bear interest at a rate of 5.900% per year payable semi-annually on May 21 and November 21 of each year, commencing on November 21, 2026. The Notes are general unsecured obligations of the Fund that rank senior in right of payment to all of the Fund’s existing and future indebtedness that is expressly subordinated in right of payment to the Notes, rank pari passu with all existing and future unsecured indebtedness issued by the Fund that are not so subordinated, rank effectively junior to any of the Fund’s secured indebtedness (including unsecured indebtedness that the Fund later secures) to the extent of the value of the assets securing such indebtedness, and rank structurally junior to all existing and future indebtedness (including trade payables) incurred by the Fund’s subsidiaries, financing vehicles or similar facilities.

The Indenture contains certain covenants, including covenants requiring the Fund to comply with the asset coverage requirements of Section 18(a)(1)(A) as modified by Section 61(a) of the Investment Company Act of 1940, as amended, whether or not it is subject to those requirements, and to provide financial information to the holders of the Notes and the Trustee if the Fund is no longer subject to the reporting requirements under the Securities Exchange Act of 1934, as amended. These covenants are subject to important limitations and exceptions that are described in the Indenture.

In addition, on the occurrence of a “change of control repurchase event,” as defined in the Indenture, the Fund will generally be required to make an offer to purchase the outstanding Notes at a price equal to 100% of the principal amount of such Notes plus accrued and unpaid interest to, but excluding, the repurchase date.

The Notes were offered and sold pursuant to an effective Registration Statement on Form N-2ASR (File No. 333-288640), filed on July 11, 2025, and the preliminary prospectus supplement and the pricing term sheet, each filed with the United States Securities and Exchange Commission on May 14, 2026. The transaction closed on May 21, 2026.

The foregoing descriptions of the Base Indenture, the Eleventh Supplemental Indenture and the Notes do not purport to be complete and are qualified in their entirety by reference to the full text of the Base Indenture, the Eleventh Supplemental Indenture and the Notes, respectively, each filed as an exhibit hereto and incorporated by reference herein.

Item 9.01.       Financial Statements and Exhibits.

(d)    Exhibits.

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.