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Aquamarine Zurich AG

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13F filer, CIK 1953324, ZURICH, Switzerland

Aquamarine Zurich AG reported $147,543,000 across 7 holdings for the quarter ended 2025-12-31, in a 13F-HR filed 2026-01-15.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001953324-26-000001

Period
2025-12-31
Reported value
$148M
Holdings
7
Top 10 weight
100%
New
0
Sold out
7

Largest buys vs the previous quarter

None.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
AXPreduced-145,000-$53.6M
BACexited-767,845-$39.6M
BRK-Breduced-43,000-$21.6M
MAreduced-25,750-$14.7M
MUexited-80,000-$13.4M

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, Q4 2025

Share positions as resolved from 13F-HR 0001953324-26-000001, largest first. % of portfolio is the value over $147,543,000, 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; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 140,600 shares; 2024Q4: 140,600 shares; 2025Q1: 140,600 shares; 2025Q2: 140,600 shares; 2025Q3: 140,600 shares; 2025Q4: 97,600 shares 97,600$49.1M33.25%-43,000Timeline
AXPAMERICAN EXPRESS COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 210,000 shares; 2024Q4: 210,000 shares; 2025Q1: 210,000 shares; 2025Q2: 210,000 shares; 2025Q3: 210,000 shares; 2025Q4: 65,000 shares 65,000$24M16.3%-145,000Timeline
MAMASTERCARD INCORPORATEDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 65,750 shares; 2024Q4: 65,750 shares; 2025Q1: 65,750 shares; 2025Q2: 65,750 shares; 2025Q3: 65,750 shares; 2025Q4: 40,000 shares 40,000$22.8M15.48%-25,750Timeline
BRK-ABERKSHIRE HATHAWAY INC DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 30 shares; 2024Q4: 30 shares; 2025Q1: 30 shares; 2025Q2: 30 shares; 2025Q3: 30 shares; 2025Q4: 30 shares 30$22.6M15.35%0Timeline
MCOMOODYS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 27,000 shares; 2024Q4: 27,000 shares; 2025Q1: 27,000 shares; 2025Q2: 27,000 shares; 2025Q3: 27,000 shares; 2025Q4: 27,000 shares 27,000$13.8M9.35%0Timeline
RACEFERRARI N VQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 60,000 shares; 2024Q4: 60,000 shares; 2025Q1: 60,000 shares; 2025Q2: 60,000 shares; 2025Q3: 60,000 shares; 2025Q4: 30,000 shares 30,000$9.56M6.48%-30,000Timeline
DJCODAILY JOURNAL CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 11,500 shares; 2024Q4: 11,500 shares; 2025Q1: 11,500 shares; 2025Q2: 11,500 shares; 2025Q3: 11,500 shares; 2025Q4: 11,500 shares 11,500$5.6M3.8%0Timeline

Sold out in Q4 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
BACBANK OF AMER CORP767,845$39.6Mshares
MUMICRON TECHNOLOGY INC80,000$13.4Mshares
BABAALIBABA GROUP HLDG LTD47,500$8.49Mshares
GOOGLALPHABET INC16,000$3.89Mshares
SRGSERITAGE GROWTH PPTYS500,000$2.12Mshares
AMRALPHA METALLURGICAL RESOUR I8,000$1.31Mshares
CNRCORE NATURAL RESOURCES INC10,740$897Kshares

How Q4 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 0001953324-26-000001 base2026-01-15acceptance time not in the bulk data set