SEC EDGAR Form 13F
Aquamarine Zurich
Aquamarine Zurich is an institutional investment manager identified in SEC EDGAR Form 13F data.
Latest Form 13F: 7 long U.S. equity positions, $135,303.00 reported value for the period ended Mar 31, 2026, led by BERKSHIRE HATHAWAY INC DEL, BERKSHIRE HATHAWAY INC DEL, and MASTERCARD INCORPORATED.
CIK: 1953324 · Filed: Apr 17, 2026 · Period: Mar 31, 2026
Reported value
$135,303.00
Positions
7
Key person
13F reporting manager
Style
Institutional 13F
Top holding
BRKB · BERKSHIRE HATHAWAY INC DEL
Period
Mar 31, 2026
Filed
Apr 17, 2026
CIK
1953324
What a 13F does not show
Form 13F covers many reportable long U.S. equity positions at quarter end. It does not show every asset type, short positions, hedges, intraperiod trades, or current holdings after the report date. Use it as ownership context, not investment advice.
Read the 13F guide →BRKB
BERKSHIRE HATHAWAY INC DEL
Portfolio weight
34.57%
BRKA
BERKSHIRE HATHAWAY INC DEL
Portfolio weight
15.92%
MA
MASTERCARD INCORPORATED
Portfolio weight
14.77%
AXP
AMERICAN EXPRESS CO
Portfolio weight
14.53%
MCO
MOODYS CORP
Portfolio weight
8.71%
Top reported holdings
Showing the top 7 positions by reported value. Source: SEC EDGAR Form 13F; period 2026-03-31; filed 2026-04-17.
| # | Ticker | Company | Shares | Value | Portfolio % | QoQ change |
|---|---|---|---|---|---|---|
| 1 | BRKB | BERKSHIRE HATHAWAY INC DEL | 97.6K | $46,770.00 | 34.57% | +0.0% |
| 2 | BRKA | BERKSHIRE HATHAWAY INC DEL | 30 | $21,544.00 | 15.92% | +0.0% |
| 3 | MA | MASTERCARD INCORPORATED | 40.0K | $19,986.00 | 14.77% | +0.0% |
| 4 | AXP | AMERICAN EXPRESS CO | 65.0K | $19,661.00 | 14.53% | +0.0% |
| 5 | MCO | MOODYS CORP | 27.0K | $11,779.00 | 8.71% | +0.0% |
| 6 | RACE | FERRARI N V | 30.0K | $10,016.00 | 7.40% | +0.0% |
| 7 | DJCO | DAILY JOURNAL CORP | 11.5K | $5,547.00 | 4.10% | +0.0% |
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