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
- +2.66%
- 3-year
- +75.51%
- 5-year
- +66.51%
- 3-year vs S&P 500
- +1.42%
- 5-year vs S&P 500
- +1.79%
- 5-year top 5
- +55.17%
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 2026-09-19 from SEC 13F data.
Live quotes available for 10 of 13 rows. Rows without a quote are marked unavailable.
| 1 | BRK-B | BERKSHIRE HATHAWAY INC DEL | 19.02% | - | 140,600 | $32.6M | $231.87 | |
| 2 | AXP | AMERICAN EXPRESS CO | 14.81% | - | 210,000 | $25.39M | $120.91 | |
| 3 | MA | MASTERCARD INC | 13.69% | - | 65,750 | $23.47M | $356.94 | |
| 4 | BAC | BK OF AMERICA CORP | 13.58% | - | 767,845 | $23.27M | $30.31 | |
| 5 | RACE | FERRARI N V | 10.76% | - | 80,000 | $18.44M | $230.47 | |
| 6 | MU | MICRON TECHNOLOGY INC | 8.77% | Add +66.7% | 200,000 | $15.04M | $75.18 | |
| 7 | BRK-A | BERKSHIRE HATHAWAY INC DEL | 6.09% | - | 30 | $10.43M | $347800.00 | |
| 8 | MCO | MOODYS CORP | 4.57% | - | 27,000 | $7.84M | $290.22 | |
| 9 | SRG | SERITAGE GROWTH PPTYS | 4.28% | - | 500,000 | $7.34M | No quote | No quote |
| 10 | WFC | WELLS FARGO CO NEW | 2.67% | - | 151,741 | $4.58M | $30.18 | |
| 11 | TWTR | TWITTER INC | 0.95% | - | 30,000 | $1.63M | No quote | No quote |
| 12 | GOOGL | ALPHABET INC | 0.82% | - | 800 | $1.4M | $1752.50 | |
| 13 | FCAU | FIAT CHRYSLER AUTOMOBILES N | - | Sold | 0 | $0 | No quote | No quote |