Guy Spier - Aquamarine Capital
As of Q2 2026, Guy Spier reported 7 long-equity positions worth $144.09M in aggregate.
Copy-investor backtest
- Latest quarter
- +3.96%
- 1-year
- +13.66%
- 3-year
- +68.33%
- 5-year
- +72.54%
- 3-year vs S&P 500
- +0.40%
- 5-year vs S&P 500
- +0.56%
- 5-year top 5
- +65.63%
Return from mechanically copying the disclosed 13F equity portfolio after each filing and rebalancing at the next. The vs S&P 500 figures subtract SPY over that manager's own rebalance dates, so both sides cover the same days; both are price return, excluding dividends. Method & limitations.
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Updated 2026-07-13 from SEC 13F data.
Live quotes available for 7 of 7 rows. Rows without a quote are marked unavailable.
| 1 | BRK-B | BERKSHIRE HATHAWAY INC DEL | 33.89% | - | 97,600 | $48.84M | $500.39 | |
| 2 | BRK-A | BERKSHIRE HATHAWAY INC DEL | 15.59% | - | 30 | $22.47M | $748866.67 | |
| 3 | AXP | AMERICAN EXPRESS CO | 15.26% | - | 65,000 | $21.99M | $338.25 | |
| 4 | MA | MASTERCARD INCORPORATED | 14.26% | - | 40,000 | $20.54M | $513.60 | |
| 5 | MCO | MOODYS CORP | 8.49% | - | 27,000 | $12.23M | $452.93 | |
| 6 | RACE | FERRARI N V | 7.71% | - | 30,000 | $11.11M | $370.47 | |
| 7 | DJCO | DAILY JOURNAL CORP | 4.80% | - | 11,500 | $6.91M | $601.22 |