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 2026-06-06 from SEC 13F data.
Live quotes available for 8 of 12 rows. Rows without a quote are marked unavailable.
| 1 | BRK/B | BERKSHIRE HATHAWAY INC DELCUSIP 084670702 | 18.77% | - | 140,600 | $35.92M | No quote | No quote |
| 2 | BAC | BK OF AMERICA CORP | 15.52% | - | 767,845 | $29.71M | $38.69 | |
| 3 | AXP | AMERICAN EXPRESS CO | 15.52% | - | 210,000 | $29.7M | $141.44 | |
| 4 | MA | MASTERCARD INCORPORATED | 12.23% | - | 65,750 | $23.41M | $356.05 | |
| 5 | MU | MICRON TECHNOLOGY INC | 9.22% | - | 200,000 | $17.64M | $88.21 | |
| 6 | RACE | FERRARI N V | 8.74% | - | 80,000 | $16.74M | $209.20 | |
| 7 | BRK/A | BERKSHIRE HATHAWAY INC DELCUSIP 084670108 | 6.04% | - | 30 | $11.57M | No quote | No quote |
| 8 | SRG | SERITAGE GROWTH PPTYS | 4.79% | - | 500,000 | $9.18M | No quote | No quote |
| 9 | MCO | MOODYS CORP | 4.21% | - | 27,000 | $8.06M | $298.63 | |
| 10 | WFC | WELLS FARGO CO NEW | 3.10% | - | 151,741 | $5.93M | $39.07 | |
| 11 | TWTR | TWITTER INC | 1.00% | - | 30,000 | $1.91M | No quote | No quote |
| 12 | GOOGL | ALPHABET INC | 0.86% | - | 800 | $1.65M | $2062.50 |