Aquamarine Capital (Aquamarine Zurich)
In its 13F for Q1 2026 (holdings as of March 31, 2026, filed April 17, 2026), Guy Spier's Aquamarine Capital (Aquamarine Zurich) reported 7 stock positions worth $135.3 million. Its top holding was Berkshire Hathaway Class B (BRK.B) at 34.6% of the portfolio, followed by Berkshire Hathaway Class A (BRK.A, 15.9%) and Mastercard Class A (MA, 14.8%). Its holdings were unchanged from Q4 2025.
- Most Recent 13F
- Q2 2026
- Notable People
- Guy Spier
- Location
- ZURICH, V8
- CIK
- 0001953324
- Portfolio Value
- $135.3M (Q1 2026)
- SEC Filing
- 0001953324-26-000002 ↗ filed Apr 17, 2026
Holdings Value
Holdings 7 stocks · $135.3M
| BRK.B Berkshire Hathaway Inc. Class B | 34.57% | 97,600 | $46.8M | No change |
| BRK.A Berkshire Hathaway Inc. Class A | 15.92% | 30 | $21.5M | No change |
| MA Mastercard Inc. Class A | 14.77% | 40,000 | $20.0M | No change |
| AXP American Express Co. | 14.53% | 65,000 | $19.7M | No change |
| MCO Moody's Corp. | 8.71% | 27,000 | $11.8M | No change |
| RACE Ferrari NV | 7.40% | 30,000 | $10.0M | No change |
| DJCO Daily Journal Corp. | 4.10% | 11,500 | $5.5M | No change |
Portfolio Sells Q4 2025 → Q1 2026
| None this quarter. | |||
Portfolio Buys Q4 2025 → Q1 2026
| None this quarter. | |||
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 7 | $144.1M | BRK.B, BRK.A, AXP, MA, MCO |
| Q1 2026 | 7 | $135.3M | BRK.B, BRK.A, MA, AXP, MCO |
| Q4 2025 | 7 | $147.5M | BRK.B, AXP, MA, BRK.A, MCO |
| Q3 2025 | 14 | $317.4M | BRK.B, AXP, BAC, MA, RACE |
| Q2 2025Amended | 14 | $309.8M | BRK.B, AXP, MA, BAC, RACE |
| Q1 2025Amended | 14 | $293.7M | BRK.B, AXP, MA, BAC, BRK.A |
| Q4 2024 | 14 | $287.6M | BRK.B, AXP, MA, BAC, RACE |
| Q3 2024 | 14 | $285.6M | BRK.B, AXP, MA, BAC, RACE |
| Q2 2024 | 14 | $262.6M | BRK.B, AXP, BAC, MA, MU |
| Q1 2024 | 12 | $261.9M | BRK.B, AXP, MA, BAC, RACE |