Company: ABTC
Filing Date: 2025-08-15
Form Type: 424B3
Source: 0001213900-25-077441
Chunk: 6

Company: American Bitcoin Corp.
Filing Date: 2025-08-15
Form: 424B3
Chunk 6
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, in Gryphon’s most recent annual report on Form 10-K for the fiscal year ended
December 31, 2024 and in other documents subsequently filed by Gryphon with the SEC.

Additional Information and Where to Find It

This Supplement relates to a proposed transaction
between ABTC and Gryphon. In connection with the proposed transaction, Gryphon filed the initial Registration Statement with the SEC on
June 6, 2025 to register the Class A common stock to be issued by Gryphon in connection with the proposed transaction. The Registration
Statement includes a proxy statement of Gryphon and a prospectus of Gryphon. The Registration Statement was declared effective by the
SEC on July 31, 2025. Gryphon filed the Definitive Proxy Statement/Prospectus with the SEC on July 31, 2025, and the Definitive
Proxy Statement/Prospectus was first mailed to Gryphon stockholders on or about August 1, 2025. Each of ABTC and Gryphon may file
with the SEC other relevant documents concerning the proposed transaction. This Supplement is not a substitute for the Registration Statement,
the Definitive Proxy Statement/Prospectus or any other relevant documents that ABTC or Gryphon has filed or may file with the SEC. BEFORE
MAKING ANY VOTING OR INVESTMENT DECISION, INVESTORS AND STOCKHOLDERS ARE URGED TO CAREFULLY AND ENTIRELY READ THE REGISTRATION STATEMENT
AND PROXY STATEMENT/PROSPECTUS REGARDING THE PROPOSED TRANSACTION, AND ANY OTHER RELEVANT DOCUMENTS, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS
TO THOSE DOCUMENTS, IF AND WHEN THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT ABTC, GRYPHON, THE PROPOSED
TRANSACTION, AND RELATED MATTERS.

A copy of the Registration Statement, the Definitive
Proxy Statement/Prospectus, as well as other relevant documents, if and when filed by ABTC and Gryphon with the SEC, may be obtained free
of charge, if and when they become available, at the SEC’s website at www.sec.gov. You will also be able to obtain these documents
free of charge, when they are available, by directing a request to Gryphon’s Investor Relations department at (646) 755-7412 or
emailing James@HaydenIR.com. The information on Hut