- Aquamarine Zurich AG Portfolio Balances (Sep 30, 2025)

As of Sep 30, 2025, the Aquamarine Zurich AG portfolio balances reported a total equity value of $317,370 across 14 publicly traded holdings. These balances reflect the most recent SEC 13F filing dated Oct 20, 2025, providing an updated snapshot of assets under management.

The portfolio balances highlight BERKSHIRE HATHAWAY INC DEL (BRK-B) as the single largest position, accounting for 22.3% of total equity value, followed by AMERICAN EXPRESS CO (AXP), BANK AMERICA CORP (BAC), MASTERCARD INCORPORATED (MA), and others. Collectively, the top five holdings represent 77.6% of the portfolio, showing how capital is distributed among core positions and long-term investments.