Company: ABTC
Filing Date: 2025-09-02
Form Type: 425
Source: 0001213900-25-082934
Chunk: 0

Company: American Bitcoin Corp.
Filing Date: 2025-09-02
Form: 425
Chunk 0
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the Securities Exchange Act of 1934

Date of report (Date of earliest event reported):
September 2, 2025

Gryphon Digital Mining, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware

(State or Other Jurisdiction of Incorporation)</div>

| 001-39096                                |     |         83-2242651 |
| (Commission File Number)                 |     |      -IRS Employer 
 Identification No. |
| 1180 N. Town Center Drive, Suite 100     |     |                    |
| Las Vegas, NV                            |     |              89144 |
| (Address of Principal Executive Offices) |     |          -Zip Code |

<div align='center'>(702) 945-2700

(Registrant’s Telephone Number, Including
Area Code)

N/A

(Former Name or Former Address, if Changed Since
Last Report)</div>

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:

| ☒ | Written communications pursuant to Rule 425 under the Securities 
 Act (17 CFR 230.425)                                             |

| ☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange 
 Act (17 CFR 240.14a-12)                                        |

| ☐ | Pre-commencement communications pursuant to Rule 14d-2(b) 
 under the Exchange Act (17 CFR 240.14d-2(b))              |

| ☐ | Pre-commencement communications pursuant to Rule 13e-4(c) 
 under the Exchange Act (17 CFR 240.13e-4(c))              |

<div align='center'>Securities registered pursuant to Section 12(b) of the Act:</div>

| Title of Each Class                       |     | Trading Symbol |     | Name of Each Exchange on Which Registered |
| Common Stock, par value $0.0001 per share |     | GRYP           |     | The Nasdaq Stock Market LLC               |

Indicate by check mark whether the registrant
is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230