American Bitcoin Corp. Appoints Interim CFO; President Resigns

What Happened
American Bitcoin Corp. (ABTC) filed an 8‑K (Aug 3, 2026) reporting executive changes under Item 5.02. On July 31, 2026 the Board appointed Paul Sacks as Interim Chief Financial Officer, effective August 4, 2026. Mr. Sacks will serve as Interim CFO in addition to his current role as Head of Derivatives with no change to his compensation or benefits. On July 30, 2026, Matthew Prusak notified the company he will step down as President and Interim CFO effective August 4, 2026 to pursue a position in Austin, Texas; his resignation was voluntary and not due to any disagreement with the company.

Key Details

• Appointment announced July 31, 2026; effective date August 4, 2026.
• Paul Sacks, 53, has been Head of Derivatives at ABTC since May 2026; prior roles include Co‑Head of Digital Exotics at BlockFills (Nov 2022–Mar 2026) and Co‑Founder/Managing Member of Digital Gamma (Jan 2017–Nov 2022).
• No change to Mr. Sacks’s compensation or benefits; ABTC entered an indemnification agreement with him (form previously filed as Exhibit 10.1 to the Company’s 8‑K of Sept 3, 2025).
• Matthew Prusak notified the company on July 30, 2026 and his resignation is effective August 4, 2026; it was voluntary and not related to disputes over financials, operations, policies, or practices.

Why It Matters
This 8‑K reports a leadership transition in ABTC’s finance function: a new Interim CFO has been named and the prior interim finance chief is leaving. For investors, the filing confirms continuity (the new Interim CFO keeps his existing role and pay) and states the departure was voluntary and not due to conflicts with the company—facts that help assess near‑term stability in management and financial oversight.