Aquamarine Zurich (Guy Spier) latest 13F portfolio: 7 holdings worth $144.1M as of Q2 2026.
Backtested since 2020: mirroring Aquamarine Zurich's reported 13F equity holdings each quarter would have returned +211.4% versus +191.8%for the S&P 500 (+19.9% annualized). See the Performance tab for the full equity curve.
Investor: Guy Spier
Number of Assets: 7
Reporting Period: Q2 - 2026
Holdings at Report: $144,091,000
Return $ Since Report: +$7,540,390
Return % Since Report: +5.23%
Company | Position | Activity | Shares | Port. % | Rep. Price | Curr. Price | Rep. Value | Curr. Value | Return Value | Return % |
|---|---|---|---|---|---|---|---|---|---|---|
| American Express Company (AXP) | Equity | 0% | 65,000 | 15.26% | $338.25 | $348.99 | $21,986,000 | $22,684,350 | +$698,350 | +3.18% |
| Berkshire Hathaway Inc. (BRK-A) | Equity | 0% | 30 | 15.59% | $748,866.67 | $777,696.00 | $22,466,000 | $23,330,880 | +$864,880 | +3.85% |
| Berkshire Hathaway Inc. (BRK-B) | Equity | 0% | 97,600 | 33.89% | $500.39 | $518.85 | $48,838,000 | $50,639,760 | +$1,801,760 | +3.69% |
| Daily Journal Corp. (DJCO) | Equity | 0% | 11,500 | 4.80% | $601.22 | $598.76 | $6,914,000 | $6,885,740 | -$28,260 | -0.41% |
| Ferrari N.V. (RACE) | Equity | 0% | 30,000 | 7.71% | $370.47 | $406.80 | $11,114,000 | $12,204,000 | +$1,090,000 | +9.81% |
| Mastercard Inc. (MA) | Equity | 0% | 40,000 | 14.26% | $513.60 | $570.48 | $20,544,000 | $22,819,200 | +$2,275,200 | +11.07% |
| Moody's Corp. (MCO) | Equity | 0% | 27,000 | 8.49% | $452.93 | $483.98 | $12,229,000 | $13,067,460 | +$838,460 | +6.86% |