Filed: 7/16/2025ACC: 0001953324-25-000004
📋 What this filing means
AQUAMARINE ZURICH AG filed this quarterly 13F‑HR report disclosing 14 equity positions with a total reported market value of $309.8K. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
14
Positions
$309.8K
Total AUM (reported)
2.06M
Total Shares
Allocation by class
COM$172.2K55.6%
CL B NEW$68.3K22.0%
CL A$60.4K19.5%
SPONSORED ADS$5.4K1.7%
CAP STK CL A$2.8K0.9%
COM SHS$749.000.2%
Portfolio Concentration
Top 3$172.2K55.6%
4–10$131.6K42.5%
11–25$6.0K1.9%
Top 3 weight
55.6%
Top 10 weight
98.1%
Voting Authority Distribution
Total shares with voting rights: 2.08M
Sole
Full voting authority
2.08M
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$68.3K
22.04%
Sole
140.60K
Shared
0.00
None
0.00
AMERICAN EXPRESS CO
SOLEShares210K
TypeSH
Market value$67.0K
21.62%
Sole
210K
Shared
0.00
None
0.00
MASTERCARD INCORPORATED
SOLEShares65.75K
TypeSH
Market value$36.9K
11.92%
Sole
65.75K
Shared
0.00
None
0.00
BANK AMERICA CORP
SOLEShares767.85K
TypeSH
Market value$36.3K
11.73%
Sole
767.85K
Shared
0.00
None
0.00
FERRARI N V
SOLEShares60K
TypeSH
Market value$25.0K
8.06%
Sole
80K
Shared
0.00
None
0.00
MICRON TECHNOLOGY INC
SOLEShares200K
TypeSH
Market value$24.6K
7.96%
Sole
200K
Shared
0.00
None
0.00
BERKSHIRE HATHAWAY INC DEL
SOLEShares30.00
TypeSH
Market value$21.9K
7.06%
Sole
30.00
Shared
0.00
None
0.00
MOODYS CORP
SOLEShares27K
TypeSH
Market value$13.5K
4.37%
Sole
27K
Shared
0.00
None
0.00
ALIBABA GROUP HLDG LTD
SOLEShares47.50K
TypeSH
Market value$5.4K
1.74%
Sole
47.50K
Shared
0.00
None
0.00
DAILY JOURNAL CORP
SOLEShares11.50K
TypeSH
Market value$4.9K
1.57%
Sole
11.50K
Shared
0.00
None
0.00
ALPHABET INC
SOLEShares16K
TypeSH
Market value$2.8K
0.91%
Sole
16K
Shared
0.00
None
0.00
SERITAGE GROWTH PPTYS
SOLEShares500K
TypeSH
Market value$1.5K
0.50%
Sole
500K
Shared
0.00
None
0.00
ALPHA METALLURGICAL RESOUR I
SOLEShares8K
TypeSH
Market value$900.00
0.29%
Sole
8K
Shared
0.00
None
0.00
CORE NATURAL RESOURCES INC
SOLEShares8.10K
TypeSH
Market value$749.00
0.24%
Sole
8.10K
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 | $68.3K 22.04% | 140.60K | 0.00 | 0.00 |
AMERICAN EXPRESS COSOLE | COM | 210K | SH | $67.0K 21.62% | 210K | 0.00 | 0.00 |
MASTERCARD INCORPORATEDSOLE | CL A | 65.75K | SH | $36.9K 11.92% | 65.75K | 0.00 | 0.00 |
BANK AMERICA CORPSOLE | COM | 767.85K | SH | $36.3K 11.73% | 767.85K | 0.00 | 0.00 |
FERRARI N VSOLE | COM | 60K | SH | $25.0K 8.06% | 80K | 0.00 | 0.00 |
MICRON TECHNOLOGY INCSOLE | COM | 200K | SH | $24.6K 7.96% | 200K | 0.00 | 0.00 |
BERKSHIRE HATHAWAY INC DELSOLE | CL A | 30.00 | SH | $21.9K 7.06% | 30.00 | 0.00 | 0.00 |
MOODYS CORPSOLE | COM | 27K | SH | $13.5K 4.37% | 27K | 0.00 | 0.00 |
ALIBABA GROUP HLDG LTDSOLE | SPONSORED ADS | 47.50K | SH | $5.4K 1.74% | 47.50K | 0.00 | 0.00 |
DAILY JOURNAL CORPSOLE | COM | 11.50K | SH | $4.9K 1.57% | 11.50K | 0.00 | 0.00 |
ALPHABET INCSOLE | CAP STK CL A | 16K | SH | $2.8K 0.91% | 16K | 0.00 | 0.00 |
SERITAGE GROWTH PPTYSSOLE | CL A | 500K | SH | $1.5K 0.50% | 500K | 0.00 | 0.00 |
ALPHA METALLURGICAL RESOUR ISOLE | COM | 8K | SH | $900.00 0.29% | 8K | 0.00 | 0.00 |
CORE NATURAL RESOURCES INCSOLE | COM SHS | 8.10K | SH | $749.00 0.24% | 8.10K | 0.00 | 0.00 |