Company: BTC
Filing Date: 2025-02-28
Form Type: 424B3
Source: 0000950170-25-029413
Chunk: 0

Company: Grayscale Bitcoin Mini Trust ETF
Filing Date: 2025-02-28
Form: 424B3
Chunk 0
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Filed Pursuant to Rule 424(b)(3) Registration No. 333-277837

<div align='center'>Grayscale Bitcoin Mini Trust ETF

Supplement No. 4 Dated February 27, 2025

To the Prospectus Dated July 30, 2024</div>

This prospectus supplement (this “Supplement”) is part of and should be read in conjunction with the prospectus of Grayscale Bitcoin Mini Trust ETF (the “Trust”), dated July 30, 2024 (as supplemented from time to time, the “Prospectus”). Unless otherwise defined herein, capitalized terms used in this Supplement shall have the same meanings as in the Prospectus.

The purpose of this Supplement is to include the Trust’s Annual Report on Form 10-K for the year ended December 31, 2024.

Annual Report on Form 10-K for the Year ended December 31, 2024

On February 27, 2025, the Trust filed its Annual Report on Form 10-K for the year ended December 31, 2024 (the “Report”) with the Securities and Exchange Commission. The Report is attached to this Supplement.

<div align='center'>Review of Finan

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K</div>

| ☒ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

<div align='center'>For the fiscal year ended December 31, 2024

or</div>

| ☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

<div align='center'>For the transition period from _____ to ______

Commission File Number001-42184

Grayscale Bitcoin Mini Trust ETF

SPONSORED BY GRAYSCALE OPERATING, LLC AND GRAYSCALE INVESTMENTS SPONSORS, LLC

(Exact Name of Registrant as Specified in Its Charter)</div>

| Delaware                                 |         99-6447880 |
| (State or Other Jurisdiction of          
 Incorporation or Organization)           |   -I.R.S. Employer 
 Identification No. |
| 290 Harbor Drive, 4th Floor              
 Stamford, Connecticut                    |              06902 |
| (Address of Principal Executive Offices) |          -Zip Code |