Filed: 10/20/2025ACC: 0001953324-25-000007
📋 What this filing means
AQUAMARINE ZURICH AG filed this quarterly 13F‑HR report disclosing 14 equity positions with a total reported market value of $317.4K. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
14
Positions
$317.4K
Total AUM (reported)
1.94M
Total Shares
Allocation by class
COM$171.3K54.0%
CL B NEW$70.7K22.3%
CL A$62.1K19.6%
SPONSORED ADS$8.5K2.7%
CAP STK CL A$3.9K1.2%
COM SHS$897.000.3%
Portfolio Concentration
Top 3$180.1K56.7%
4–10$129.1K40.7%
11–25$8.2K2.6%
Top 3 weight
56.7%
Top 10 weight
97.4%
Voting Authority Distribution
Total shares with voting rights: 1.96M
Sole
Full voting authority
1.96M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole14
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings14
Rows:
BERKSHIRE HATHAWAY INC DEL
SOLEShares140.60K
TypeSH
Market value$70.7K
22.27%
Sole
140.60K
Shared
0.00
None
0.00
AMERICAN EXPRESS CO
SOLEShares210K
TypeSH
Market value$69.8K
21.98%
Sole
210K
Shared
0.00
None
0.00
BANK AMERICA CORP
SOLEShares767.85K
TypeSH
Market value$39.6K
12.48%
Sole
767.85K
Shared
0.00
None
0.00
MASTERCARD INCORPORATED
SOLEShares65.75K
TypeSH
Market value$37.4K
11.78%
Sole
65.75K
Shared
0.00
None
0.00
FERRARI N V
SOLEShares60K
TypeSH
Market value$29.0K
9.13%
Sole
80K
Shared
0.00
None
0.00
BERKSHIRE HATHAWAY INC DEL
SOLEShares30.00
TypeSH
Market value$22.6K
7.13%
Sole
30.00
Shared
0.00
None
0.00
MICRON TECHNOLOGY INC
SOLEShares80K
TypeSH
Market value$13.4K
4.22%
Sole
80K
Shared
0.00
None
0.00
MOODYS CORP
SOLEShares27K
TypeSH
Market value$12.9K
4.05%
Sole
27K
Shared
0.00
None
0.00
ALIBABA GROUP HLDG LTD
SOLEShares47.50K
TypeSH
Market value$8.5K
2.68%
Sole
47.50K
Shared
0.00
None
0.00
DAILY JOURNAL CORP
SOLEShares11.50K
TypeSH
Market value$5.3K
1.69%
Sole
11.50K
Shared
0.00
None
0.00
ALPHABET INC
SOLEShares16K
TypeSH
Market value$3.9K
1.23%
Sole
16K
Shared
0.00
None
0.00
SERITAGE GROWTH PPTYS
SOLEShares500K
TypeSH
Market value$2.1K
0.67%
Sole
500K
Shared
0.00
None
0.00
ALPHA METALLURGICAL RESOUR I
SOLEShares8K
TypeSH
Market value$1.3K
0.41%
Sole
8K
Shared
0.00
None
0.00
CORE NATURAL RESOURCES INC
SOLEShares10.74K
TypeSH
Market value$897.00
0.28%
Sole
10.74K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
BERKSHIRE HATHAWAY INC DELSOLE | CL B NEW | 140.60K | SH | $70.7K 22.27% | 140.60K | 0.00 | 0.00 |
AMERICAN EXPRESS COSOLE | COM | 210K | SH | $69.8K 21.98% | 210K | 0.00 | 0.00 |
BANK AMERICA CORPSOLE | COM | 767.85K | SH | $39.6K 12.48% | 767.85K | 0.00 | 0.00 |
MASTERCARD INCORPORATEDSOLE | CL A | 65.75K | SH | $37.4K 11.78% | 65.75K | 0.00 | 0.00 |
FERRARI N VSOLE | COM | 60K | SH | $29.0K 9.13% | 80K | 0.00 | 0.00 |
BERKSHIRE HATHAWAY INC DELSOLE | CL A | 30.00 | SH | $22.6K 7.13% | 30.00 | 0.00 | 0.00 |
MICRON TECHNOLOGY INCSOLE | COM | 80K | SH | $13.4K 4.22% | 80K | 0.00 | 0.00 |
MOODYS CORPSOLE | COM | 27K | SH | $12.9K 4.05% | 27K | 0.00 | 0.00 |
ALIBABA GROUP HLDG LTDSOLE | SPONSORED ADS | 47.50K | SH | $8.5K 2.68% | 47.50K | 0.00 | 0.00 |
DAILY JOURNAL CORPSOLE | COM | 11.50K | SH | $5.3K 1.69% | 11.50K | 0.00 | 0.00 |
ALPHABET INCSOLE | CAP STK CL A | 16K | SH | $3.9K 1.23% | 16K | 0.00 | 0.00 |
SERITAGE GROWTH PPTYSSOLE | CL A | 500K | SH | $2.1K 0.67% | 500K | 0.00 | 0.00 |
ALPHA METALLURGICAL RESOUR ISOLE | COM | 8K | SH | $1.3K 0.41% | 8K | 0.00 | 0.00 |
CORE NATURAL RESOURCES INCSOLE | COM SHS | 10.74K | SH | $897.00 0.28% | 10.74K | 0.00 | 0.00 |