Company: FUFU
Filing Date: 2025-09-05
Form Type: 6-K
Source: 0001213900-25-084744
Chunk: 0

Company: Bitfufu Inc.
Filing Date: 2025-09-05
Form: 6-K
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16 OF
THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2025 Commission file number: 001-41972 BitFuFu Inc. (Exact Name of Registrant as Specified in Its Charter) 9 Temasek Boulevard Suntec Tower 2, #13-01 Singapore 038989 (Address of Principal Executive Offices) Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F. Form 20-F ☒ Form 40-F ☐ INCORPORATION BY REFERENCE This current report on Form 6-K is hereby incorporated by reference in the registration statements of BitFuFu Inc. on Form F-3 ( No. 333-278207, No. 333-286356and No. 333-288554), to the extent not superseded by documents or reports subsequently filed or furnished. EXHIBIT INDEX

| Exhibit No. |     | Description                                                                                                                                                      |
| 99.1        |     | Unaudited Interim Condensed Consolidated Financial Statements of BitFuFu Inc.                                                                                    |
| 101.INS     |     | Inline XBRL Instance Document—this instance document does not appear in the Interactive Data File because its XBRL tags embedded within the Inline XBRL document |
| 101.SCH     |     | Inline XBRL Taxonomy Extension Schema Document                                                                                                                   |
| 101.CAL     |     | Inline XBRL Taxonomy Extension Calculation Linkbase Document                                                                                                     |
| 101.DEF     |     | Inline XBRL Taxonomy Extension Definition Linkbase Document                                                                                                      |
| 101.LAB     |     | Inline XBRL Taxonomy Extension Label Linkbase Document                                                                                                           |
| 101.PRE     |     | Inline XBRL Taxonomy Extension Presentation Linkbase Document                                                                                                    |
| 104         |     | Cover Page Interactive Data File (embedded within the Inline XBRL document)                                                                                      |

1 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, thereunto duly authorized.

| Date: September 5, 2025 | BitFuFu Inc. 
 By: