Company: FUFU
Filing Date: 2025-08-15
Form Type: 6-K
Source: 0001213900-25-077015
Chunk: 0

Company: Bitfufu Inc.
Filing Date: 2025-08-15
Form: 6-K
Chunk 0
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<div align='center'>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 August 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)</div>

Indicate by check mark whether the registrant files or will file annual
reports under cover Form 20-F or Form 40-F.

<div align='center'>Form 20-F ☒
Form 40-F ☐

INCORPORATION BY REFERENCE</div>

This current report on Form 6-K is hereby incorporated
by reference in the registration statements of BitFuFu Inc. on Form F-3 (, and No. 333-288554),
to the extent not superseded by documents or reports subsequently filed or furnished.

<div align='center'>EXHIBIT INDEX</div>

| Exhibit No. |     | Description                                                                     |
| 99.1        |     | Press Release - BitFuFu Reports Unaudited Second Quarter 2025 Financial Results |

<div align='center'>1

SIGNATURE</div>

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: August 15, 2025 | BitFuFu Inc. 
 By:          | /s/ Leo Lu                         |
|:----------------------|:-------------|:-----------------------------------|
|                       | Name:        | Leo Lu                             |
|                       | Title:       | Chairman of Board of Directors and 
 Chief Executive Officer            |

<div align='center'>2</div>