Aquamarine Zurich AG reported 7 positions worth $144.09M for the quarter ended Jun 30, 2026, up 6.5% on the prior quarter. It opened 0 new positions, added to 0, trimmed 0 and exited 0. Its largest holding is Berkshire Hathaway Inc at 33.9% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
No positions were added to this quarter.
No positions were reduced this quarter.
No new positions this quarter.
No positions were closed this quarter.
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | BRK-B Berkshire Hathaway Inc | Financial Services | 97.6K | $48.84M | 33.89% | 0 | 0.0% | Unchanged | 0.01% |
| 2 | BRK-A Berkshire Hathaway Inc | Financial Services | 30 | $22.47M | 15.59% | 0 | 0.0% | Unchanged | 0.01% |
| 3 | AXP American Express Co | Financial Services | 65.0K | $21.99M | 15.26% | 0 | 0.0% | Unchanged | 0.01% |
| 4 | MA Mastercard Inc | Financial Services | 40.0K | $20.54M | 14.26% | 0 | 0.0% | Unchanged | 0% |
| 5 | MCO Moodys Corp | Financial Services | 27.0K | $12.23M | 8.49% | 0 | 0.0% | Unchanged | 0.02% |
| 6 | RACE Ferrari N.V. | Consumer Discretionary | 30.0K | $11.11M | 7.71% | 0 | 0.0% | Unchanged | 0.02% |
| 7 | DJCO Daily Journal Corp | Communication Services | 11.5K | $6.91M | 4.8% | 0 | 0.0% | Unchanged | 0.83% |
Tip. Select a row to see that position’s full history at Aquamarine Zurich AG.
As of its Q2 2026 13F filing, Aquamarine Zurich AG’s five largest positions were Berkshire Hathaway Inc (BRK-B) at 33.9%, Berkshire Hathaway Inc (BRK-A) at 15.6%, American Express Co (AXP) at 15.3%, Mastercard Inc (MA) at 14.3%, Moodys Corp (MCO) at 8.5% of the reported portfolio.
Aquamarine Zurich AG reported a 13F portfolio worth $144.09M across 7 positions for Q2 2026. That is up 6.5% from the previous quarter.
From the Form 13F-HR reports Aquamarine Zurich AG files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.