Aquamarine
SuperinvestorAquamarine Zurich AG
- SEC CIK
- 0001953324
- Manager
- Guy Spier
- Style
- Value
- Latest filing
- Jul 10, 2026
Predecessor filersAquamarine Capital Management, LLC
Holdings in Q4 2025
Holdings as of Dec 31, 2025, filed Jan 15, 2026. Long positions only; changes compare share counts with Q3 2025.
- Positions
- 7
- −7 vs. Q3 2025
- Portfolio value
- $147.5M
- −$169.8M (−53.5%) vs. Q3 2025
| Security | Class | Shares | Value | % of portfolio | Share change | Action | History |
|---|---|---|---|---|---|---|---|
| BRK.BBerkshire Hathaway Inc | Stock | 97,600 | $49.1M | 33.3% | −43,000−30.6% | Reduced | History |
| AXPAmerican Express Co | Stock | 65,000 | $24.0M | 16.3% | −145,000−69.0% | Reduced | History |
| MAMastercard Inc | Stock | 40,000 | $22.8M | 15.5% | −25,750−39.2% | Reduced | History |
| BRK.ABerkshire Hathaway Inc | CL A | 30 | $22.6M | 15.3% | 00.0% | Unchanged | History |
| MCOMoodys Corp | Stock | 27,000 | $13.8M | 9.3% | 00.0% | Unchanged | History |
| RACEFerrari N.V. | COM | 30,000 | $9.56M | 6.5% | −30,000−50.0% | Reduced | History |
| DJCODaily Journal Corp | COM | 11,500 | $5.60M | 3.8% | 00.0% | Unchanged | History |
Sold out since Q3 2025 (7)
Positions held at the end of Q3 2025 that are gone from this filing.
| Security | Class | Shares in Q3 2025 | Value in Q3 2025 | % of portfolio in Q3 2025 | History |
|---|---|---|---|---|---|
| BACBank of America Corp | Stock | 767,845 | $39.6M | 12.5% | History |
| MUMicron Technology Inc | Stock | 80,000 | $13.4M | 4.2% | History |
| BABAAlibaba Group Holding Ltd | ADR | 47,500 | $8.49M | 2.7% | History |
| GOOGLAlphabet Inc. | Stock | 16,000 | $3.89M | 1.2% | History |
| SRGSeritage Growth Properties | CL A | 500,000 | $2.13M | 0.7% | History |
| AMRAlpha Metallurgical Resources, Inc. | COM | 8,000 | $1.31M | 0.4% | History |
| CNRCore Natural Resources, Inc. | COM SHS | 10,740 | $897.0K | 0.3% | History |