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 +202.9% versus +194.0%for the S&P 500 (+19.0% 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: +$3,343,641
Return % Since Report: +2.32%
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 | $313.59 | $21,986,000 | $20,383,350 | -$1,602,650 | -7.29% |
| Berkshire Hathaway Inc. (BRK-A) | Equity | 0% | 30 | 15.59% | $748,866.67 | $752,180.00 | $22,466,000 | $22,565,400 | +$99,400 | +0.44% |
| Berkshire Hathaway Inc. (BRK-B) | Equity | 0% | 97,600 | 33.89% | $500.39 | $502.01 | $48,838,000 | $48,996,176 | +$158,176 | +0.32% |
| Daily Journal Corp. (DJCO) | Equity | 0% | 11,500 | 4.80% | $601.22 | $668.25 | $6,914,000 | $7,684,875 | +$770,875 | +11.15% |
| Ferrari N.V. (RACE) | Equity | 0% | 30,000 | 7.71% | $370.47 | $416.13 | $11,114,000 | $12,483,900 | +$1,369,900 | +12.33% |
| Mastercard Inc. (MA) | Equity | 0% | 40,000 | 14.26% | $513.60 | $567.65 | $20,544,000 | $22,706,000 | +$2,162,000 | +10.52% |
| Moody's Corp. (MCO) | Equity | 0% | 27,000 | 8.49% | $452.93 | $467.22 | $12,229,000 | $12,614,940 | +$385,940 | +3.16% |