Justin Mateen Sells 254,778 Shares of Class A Common Stock and 254,778 Restricted Stock Units

Justin Mateen, a director at American Bitcoin Corp., reported a disposition of 254,778 shares of Class A Common Stock on June 22, 2026. The transaction code "M" and "A" indicate a disposition and acquisition, respectively, with a post-transaction share count of 2,779,753. Concurrently, Mr. Mateen also disposed of 254,778 Restricted Stock Units (RSUs), which vested and converted into Class A common stock on a one-for-one basis. These RSUs settled at the discretion of the Issuer. The disposition of RSUs is also marked with transaction code "M" and "D", with zero shares held post-transaction. The reported shares and RSUs were acquired or disposed of under specific conditions detailed in the footnotes.