Company: BXSL
Filing Date: 2025-10-06
Form Type: 424B2
Source: 0001213900-25-096307
Chunk: 172

Company: Blackstone Secured Lending Fund
Filing Date: 2025-10-06
Form: 424B2
Chunk 172
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 on Form 10 -Kfor the fiscal year ended December31, 2024, filed with the SEC on February26, 2025. •our Quarterly Report on Form 10 -Qfor the three months ended March31, 2025, filed with the SEC on May7, 2025. •our Current Reports on Form 8 -K(other than information furnished rather than filed) filed with the SEC on January21, 2025and March4, 2025. •the description of our common shares referenced in our Registration Statement on Form 8 -A(No. 001 -40966), as filed with the SEC on October26, 2021, including any amendment or report filed for the purpose of updating such description prior to the termination of the offering of the common shares registered hereby. See “ Available Information” for information on how to obtain a copy of these filings. 146

$ Blackstone Secured Lending Fund % Notes due ___________________________ PROSPECTUS SUPPLEMENT ___________________________ Joint Book-Running Managers

| Citigroup |     | Deutsche Bank Securities |     | Morgan Stanley |     | SMBC Nikko |     | Truist Securities |

, 2025