Aquamarine Capital 13F, Q2 2026
Guy Spier · quarter ending 30 June 2026 · filed 10 July 2026 · SEC CIK 1953324
Common stock only: shares the fund reported owning at the quarter end, valued as filed.
Largest positions, Q2 2026
Weights are against the whole filed book. Changes are in shares held, against the Q1 2026 filing.
| Company | Ticker | Value | % of book | vs Q1 2026 |
|---|---|---|---|---|
| BERKSHIRE HATHAWAY INC DEL | BRK/B | $48.84M | 33.9% | unchanged |
| BERKSHIRE HATHAWAY INC DEL | BRK/A | $22.47M | 15.6% | unchanged |
| AMERICAN EXPRESS CO | AXP | $21.99M | 15.3% | unchanged |
| MASTERCARD INCORPORATED | MA | $20.54M | 14.3% | unchanged |
| MOODYS CORP | MCO | $12.23M | 8.5% | unchanged |
| FERRARI N V | $11.11M | 7.7% | unchanged | |
| DAILY JOURNAL CORP | DJCO | $6.91M | 4.8% | unchanged |
What changed since Q1 2026
Against the Q1 2026 filing, Aquamarine Capital opened 0 new positions, added to 0, trimmed 0, left 7 unchanged and exited 0. Every position is compared, matched on its CUSIP; a change of 2% or less in shares counts as unchanged.
New positions
No new positions this quarter.
Exited
Nothing from the previous filing was sold outright.
Added to
No position was increased by more than 2%.
Trimmed
No position was cut by more than 2%.
Other quarters
Source: SEC Form 13F-HR, accession 0001953324-26-000003, filed by Aquamarine Zurich AG. Values are as filed and cover US-listed positions only; a 13F does not show short positions or holdings outside the US. A 13F may be filed up to 45 days after the quarter ends, so the fund may have traded since. Educational information, not financial advice.