What Guy Spier Bought in Q3 2025
Aquamarine Capital Management · Quarterly 13F recap as filed with the SEC.
Period: 2025-09-30 · Filed · Historical
$317.4M
Total Value
14
Holdings
2
New Buys
2
Reduced
In Q3 2025, Guy Spier reported 14 long equity positions worth $317.4M in their Aquamarine Capital Management 13F filing, including 2 new positions (largest: ALPHA METALLURGICAL RESOUR I at $1.3M) and 1 increased positions.
| Rank | Ticker | Company | Shares | Value | % Portfolio | Change |
|---|---|---|---|---|---|---|
| 1 | BRK.B | Berkshire Hathaway Inc. Class B | 140600 | $70.7M | 22.27% | — |
| 2 | AXP | AMERICAN EXPRESS CO | 210000 | $69.8M | 21.98% | — |
| 3 | BAC | BANK AMERICA CORP | 767845 | $39.6M | 12.48% | — |
| 4 | MA | MASTERCARD INCORPORATED | 65750 | $37.4M | 11.78% | — |
| 5 | RACE | FERRARI N V | 60000 | $29.0M | 9.13% | -25.0% |
| 6 | BRK.A | Berkshire Hathaway Inc. Class A | 30 | $22.6M | 7.13% | — |
| 7 | MU | MICRON TECHNOLOGY INC | 80000 | $13.4M | 4.22% | +-60.0% |
| 8 | MCO | MOODYS CORP | 27000 | $12.9M | 4.05% | — |
| 9 | BABA | ALIBABA GROUP HLDG LTD | 47500 | $8.5M | 2.68% | — |
| 10 | DJCO | DAILY JOURNAL CORP | 11500 | $5.3M | 1.69% | — |
| 11 | GOOGL | ALPHABET INC | 16000 | $3.9M | 1.23% | 1900.0% |
| 12 | SRG-PA | SERITAGE GROWTH PPTYS | 500000 | $2.1M | 0.67% | — |
| 13 | AMR | ALPHA METALLURGICAL RESOUR I | 8000 | $1.3M | 0.41% | NEW |
| 14 | CNR | CORE NATURAL RESOURCES INC | 10740 | $897K | 0.28% | NEW |