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Aquamarine Zurich AG

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13F filer, CIK 1953324, ZURICH, Switzerland

Aquamarine Zurich AG reported $317,370,000 across 14 holdings for the quarter ended 2025-09-30, in a 13F-HR filed 2025-10-20. Its ten largest share positions make up 97.41% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001953324-25-000007

Period
2025-09-30
Reported value
$317M
Holdings
14
Top 10 weight
97.41%
New
0
Sold out
0

Largest buys vs the previous quarter

None.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
MUreduced-120,000-$20.1M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q3 2025

Share positions as resolved from 13F-HR 0001953324-25-000007, largest first. % of portfolio is the value over $317,370,000, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
BRK-BBERKSHIRE HATHAWAY INC DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 140,600 shares; 2024Q4: 140,600 shares; 2025Q1: 140,600 shares; 2025Q2: 140,600 shares; 2025Q3: 140,600 shares 140,600$70.7M22.27%0Timeline
AXPAMERICAN EXPRESS COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 210,000 shares; 2024Q4: 210,000 shares; 2025Q1: 210,000 shares; 2025Q2: 210,000 shares; 2025Q3: 210,000 shares 210,000$69.8M21.98%0Timeline
BACBANK OF AMER CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 767,845 shares; 2024Q4: 767,845 shares; 2025Q1: 767,845 shares; 2025Q2: 767,845 shares; 2025Q3: 767,845 shares 767,845$39.6M12.48%0Timeline
MAMASTERCARD INCORPORATEDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 65,750 shares; 2024Q4: 65,750 shares; 2025Q1: 65,750 shares; 2025Q2: 65,750 shares; 2025Q3: 65,750 shares 65,750$37.4M11.78%0Timeline
RACEFERRARI N VQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 60,000 shares; 2024Q4: 60,000 shares; 2025Q1: 60,000 shares; 2025Q2: 60,000 shares; 2025Q3: 60,000 shares 60,000$29M9.13%0Timeline
BRK-ABERKSHIRE HATHAWAY INC DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 30 shares; 2024Q4: 30 shares; 2025Q1: 30 shares; 2025Q2: 30 shares; 2025Q3: 30 shares 30$22.6M7.13%0Timeline
MUMICRON TECHNOLOGY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 200,000 shares; 2024Q4: 200,000 shares; 2025Q1: 200,000 shares; 2025Q2: 200,000 shares; 2025Q3: 80,000 shares 80,000$13.4M4.22%-120,000Timeline
MCOMOODYS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 27,000 shares; 2024Q4: 27,000 shares; 2025Q1: 27,000 shares; 2025Q2: 27,000 shares; 2025Q3: 27,000 shares 27,000$12.9M4.05%0Timeline
BABAALIBABA GROUP HLDG LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 47,500 shares; 2024Q4: 47,500 shares; 2025Q1: 47,500 shares; 2025Q2: 47,500 shares; 2025Q3: 47,500 shares 47,500$8.49M2.68%0Timeline
DJCODAILY JOURNAL CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 11,500 shares; 2024Q4: 11,500 shares; 2025Q1: 11,500 shares; 2025Q2: 11,500 shares; 2025Q3: 11,500 shares 11,500$5.35M1.69%0Timeline
GOOGLALPHABET INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 16,000 shares; 2024Q4: 16,000 shares; 2025Q1: 16,000 shares; 2025Q2: 16,000 shares; 2025Q3: 16,000 shares 16,000$3.89M1.23%0Timeline
SRGSERITAGE GROWTH PPTYSQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 500,000 shares; 2024Q4: 500,000 shares; 2025Q1: 500,000 shares; 2025Q2: 500,000 shares; 2025Q3: 500,000 shares 500,000$2.12M0.67%0Timeline
AMRALPHA METALLURGICAL RESOUR IQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 8,000 shares; 2024Q4: 8,000 shares; 2025Q1: 8,000 shares; 2025Q2: 8,000 shares; 2025Q3: 8,000 shares 8,000$1.31M0.41%0Timeline
CNRCORE NATURAL RESOURCES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 10,740 shares; 2025Q2: 10,740 shares; 2025Q3: 10,740 shares 10,740$897K0.28%0Timeline

How Q3 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001953324-25-000007 base2025-10-20acceptance time not in the bulk data set