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Guy Spier 13F Portfolio
AQUAMARINE CAPITAL MANAGEMENT, LLC
Latest SEC 13F filing: 2026-06-30
Guy Spier runs AQUAMARINE CAPITAL MANAGEMENT, LLC and currently holds 7 stock positions, which is fewer than the average of 232 among the investors we track. The portfolio is valued at approximately $144.09M. Their top holdings are BRK-B, BRK-A, AXP, MA, MCO. The top five represent 87.5% of reported portfolio weight. Guy Spier ranks #432 out of 1000 investors tracked by Alpha Score. Their current best-performing preview position is DJCO with returns of +24.64%.
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Top 5 Holdings
BRK-B33.9%
BRK-A15.6%
AXP15.3%
MA14.3%
MCO8.5%
Top 5: 87.5%
Portfolio Returns
1 Year
+4.61%
#963/10003 Year
+59.86%
#629/10005 Year
+104.30%
#253/1000Portfolio Value
$144.09M
Alpha Score
61.2
#432 of 1000
Holdings
7
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Guy Spier Current 13F Holdings
Reported holdings from AQUAMARINE CAPITAL MANAGEMENT, LLC's latest SEC 13F filing, ranked by portfolio weight.
7 stock holdings
| Holding | Weight | Avg Buy | Current | Return | Quarter Change |
|---|---|---|---|---|---|
 BRK-B BERKSHIRE HATHAWAY INC DEL | 33.89% | $267.02 | $545.61 | +104.33% | Held |
 BRK-A BERKSHIRE HATHAWAY INC DEL | 15.59% | $406,470.00 | $817,699.89 | +101.17% | Held |
 AXP AMERICAN EXPRESS CO | 15.26% | $134.91 | $313.70 | +132.53% | Held |
 MA MASTERCARD INCORPORATED | 14.26% | $284.34 | $607.74 | +113.74% | Held |
 MCO MOODYS CORP | 8.49% | $243.11 | $471.80 | +94.07% | Held |
 RACE FERRARI N V | 7.71% | $185.00 | $389.78 | +110.69% | Held |
 DJCO DAILY JOURNAL CORP | 4.80% | $256.39 | $605.90 | +136.32% | Held |