Institutional Manager · CIK 0001953324
Aquamarine Zurich AG
ZURICH, V8 · File #028-22669
Latest AUM
$147,543
Positions
7
Top-10 Concentration
100.0%
Filings
11
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | AMERICAN EXPRESS CO | AXP | -145,000 | -$53,643 | +$7,936 |
| EXITED | BANK AMERICA CORP | 060505104 | -767,845 | -$39,613 | $0 |
| REDUCE | BERKSHIRE HATHAWAY INC DEL | BRK-A | -43,000 | -$21,614 | -$12 |
| REDUCE | MASTERCARD INCORPORATED | MA | -25,750 | -$14,700 | +$136 |
| EXITED | MICRON TECHNOLOGY INC | 595112103 | -80,000 | -$13,386 | $0 |
| REDUCE | FERRARI N V | RACE | -30,000 | -$9,561 | -$9,856 |
| EXITED | ALIBABA GROUP HLDG LTD | 01609W102 | -47,500 | -$8,490 | $0 |
| EXITED | ALPHABET INC | 02079K305 | -16,000 | -$3,890 | $0 |
| EXITED | SERITAGE GROWTH PPTYS | 81752R100 | -500,000 | -$2,125 | $0 |
| EXITED | ALPHA METALLURGICAL RESOUR I | 020764106 | -8,000 | -$1,313 | $0 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 20257 pos · $147,543
- 13F HOLDINGS REPORTQ/E Sep 202514 pos · $317,370
- 13F HOLDINGS REPORT (Amended)Q/E Jun 202514 pos · $293,674
- 13F HOLDINGS REPORT (Amended)Q/E Jun 202514 pos · $309,842
- 13F HOLDINGS REPORTQ/E Jun 202514 pos · $309,842
- 13F HOLDINGS REPORTQ/E Mar 202514 pos · $293,674
- 13F HOLDINGS REPORTQ/E Dec 202414 pos · $287,605
- 13F HOLDINGS REPORTQ/E Sep 202414 pos · $285,595
- 13F HOLDINGS REPORTQ/E Jun 202414 pos · $262,557
- 13F HOLDINGS REPORTQ/E Mar 202412 pos · $261,934
- 13F HOLDINGS REPORTQ/E Dec 202312 pos · $202,847
Top 7 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | BERKSHIRE HATHAWAY INC DEL | BRK-A | 97,600 | $49,059 | 33.25% |
| 2 | AMERICAN EXPRESS CO | AXP | 65,000 | $24,047 | 16.30% |
| 3 | MASTERCARD INCORPORATED | MA | 40,000 | $22,835 | 15.48% |
| 4 | BERKSHIRE HATHAWAY INC DEL | BRK-A | 30 | $22,644 | 15.35% |
| 5 | MOODYS CORP | MCO | 27,000 | $13,793 | 9.35% |
| 6 | FERRARI N V | RACE | 30,000 | $9,561 | 6.48% |
| 7 | DAILY JOURNAL CORP | DJCO | 11,500 | $5,604 | 3.80% |