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
- +26.52%
- 3-year
- +68.32%
- 3-year top 5
- +50.23%
Return from mechanically copying the disclosed 13F equity portfolio after each filing and rebalancing at the next. 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 9 of 12 rows. Rows without a quote are marked unavailable.
| 1 | BRK/B | BERKSHIRE HATHAWAY INC DELCUSIP 084670702 | 22.84% | - | 140,600 | $37.54M | No quote | No quote |
| 2 | AXP | AMERICAN EXPRESS CO | 17.24% | - | 210,000 | $28.33M | $134.91 | |
| 3 | BAC | BK OF AMERICA CORP | 14.11% | - | 767,845 | $23.19M | $30.20 | |
| 4 | MA | MASTERCARD INCORPORATED | 11.37% | - | 65,750 | $18.7M | $284.33 | |
| 5 | RACE | FERRARI N V | 9.15% | - | 80,000 | $15.03M | $187.90 | |
| 6 | BRK/A | BERKSHIRE HATHAWAY INC DELCUSIP 084670108 | 7.42% | - | 30 | $12.19M | No quote | No quote |
| 7 | MU | MICRON TECHNOLOGY INC | 6.10% | - | 200,000 | $10.02M | $50.10 | |
| 8 | MCO | MOODYS CORP | 3.99% | - | 27,000 | $6.56M | $243.11 | |
| 9 | SRG | SERITAGE GROWTH PPTYS | 2.74% | - | 500,000 | $4.51M | No quote | No quote |
| 10 | BABA | ALIBABA GROUP HLDG LTD | 2.31% | - | 47,500 | $3.8M | $80.00 | |
| 11 | DJCO | DAILY JOURNAL CORP | 1.79% | - | 11,500 | $2.95M | $256.35 | |
| 12 | GOOGL | ALPHABET INC | 0.93% | Reduce -95.0%20:1 split | 800 | $1.53M | $1912.50 |