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.
Get email alerts when Guy Spier files a new 13F — sign in or create a free account.
Updated 2026-06-06 from SEC 13F data.
Live quotes available for 8 of 13 rows. Rows without a quote are marked unavailable.
| 1 | BRK/B | BERKSHIRE HATHAWAY INC DELCUSIP 084670702 | 19.75% | - | 140,600 | $29.94M | No quote | No quote |
| 2 | MA | MASTERCARD INC | 14.67% | - | 65,750 | $22.24M | $338.17 | |
| 3 | AXP | AMERICAN EXPRESS CO | 13.89% | - | 210,000 | $21.05M | $100.25 | |
| 4 | BAC | BK OF AMERICA CORP | 12.20% | - | 767,845 | $18.5M | $24.09 | |
| 5 | RACE | FERRARI N V | 9.69% | - | 80,000 | $14.69M | $183.61 | |
| 6 | BRK/A | BERKSHIRE HATHAWAY INC DELCUSIP 084670108 | 6.33% | - | 30 | $9.6M | No quote | No quote |
| 7 | FCAU | FIAT CHRYSLER AUTOMOBILES N | 6.15% | - | 760,000 | $9.33M | No quote | No quote |
| 8 | MCO | MOODYS CORP | 5.16% | - | 27,000 | $7.83M | $289.85 | |
| 9 | SRG | SERITAGE GROWTH PPTYS | 4.44% | - | 500,000 | $6.73M | No quote | No quote |
| 10 | MU | MICRON TECHNOLOGY INC | 3.72% | - | 120,000 | $5.64M | $46.96 | |
| 11 | WFC | WELLS FARGO CO NEW | 2.35% | - | 151,741 | $3.57M | $23.51 | |
| 12 | TWTR | TWITTER INC | 0.88% | - | 30,000 | $1.34M | No quote | No quote |
| 13 | GOOGL | ALPHABET INC | 0.77% | - | 800 | $1.17M | $1465.00 |