2026-Q2 · 7 positions · $144M reported · filed 2026-07-10
PORT replays the filed quarters against SPY — return, risk, attribution and what changed since the previous book.
Top holdings · as reported for 2026-Q2
| Ticker | Name | Sector | Weight |
|---|---|---|---|
| BRK.B | BERKSHIRE HATHAWAY INC DEL | Financials | 33.9% |
| BRK.A | BERKSHIRE HATHAWAY INC DEL | — | 15.6% |
| AXP | AMERICAN EXPRESS CO | Financials | 15.3% |
| MA | MASTERCARD INCORPORATED | Financials | 14.3% |
| MCO | MOODYS CORP | Financials | 8.5% |
| RACE | FERRARI N V | Consumer Discretionary | 7.7% |
| DJCO | DAILY JOURNAL CORP | Communication Services | 4.8% |
Versus 2026-Q1: 0 new · 0 added · 0 trimmed · 7 held · 0 exited
Sector mix: Financials 71.9% · Consumer Discretionary 7.7% · Communication Services 4.8% of the book · The five largest positions are 87.5% of the book.
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PORT — Aquamarine Zurich AG · 13F 2026-Q2
Aquamarine Zurich AG's filed 13F book, analyzed: return vs SPY, risk, attribution, what changed.
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Hypothetical, modeled with hindsight — not real results, and no guide to future results. See the Disclaimer.