Amendment to Schedule 13D Filing for American Bitcoin Corp.

This filing is an amendment to the Schedule 13D originally filed by Eric Trump. On December 18, 2025, the Eric F. Trump Revocable Trust - 2015 purchased 285,000 shares of Class A Common Stock of American Bitcoin Corp. at $1.7546 per share, funded by cash on hand. This transaction brings the total beneficial ownership of Eric Trump and the 2015 Trust to 68,432,664 shares, representing 7.4% of the Class A Common Stock. No other transactions in the Common Stock have been effected by the Reporting Persons since November 20, 2025. The filing details the ownership percentages and voting powers, calculated based on outstanding shares as of November 14, 2025. Eric Trump, as trustee of the 2015 Trust, may be deemed to beneficially own the shares held by the trust.