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Livermore
Livermore
ZHEN

Aquamarine

Superinvestor

Aquamarine Zurich AG

SEC CIK
0001953324
Manager
Guy Spier
Style
Value
Latest filing
Jul 10, 2026

Predecessor filersAquamarine Capital Management, LLC

BRK.B holding history

Berkshire Hathaway Inc in every 13F filed by Aquamarine, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

BRK.B overviewAll 13F holders of BRK.BFull Q2 2026 holdings

Shares (Q2 2026)
97,600
Value
$48.8M
% of portfolio
33.9%
Quarters held
16
Since Q3 2022
Holdings of BRK.B by Aquamarine, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202697,600$48.8M33.9%00.0%UnchangedHolders
Q1 202697,600$46.8M34.6%00.0%UnchangedHolders
Q4 202597,600$49.1M33.3%−43,000−30.6%ReducedHolders
Q3 2025140,600$70.7M22.3%00.0%UnchangedHolders
Q2 2025140,600$68.3M22.0%00.0%UnchangedHolders
Q1 2025140,600$74.9M25.5%00.0%UnchangedHolders
Q4 2024140,600$63.7M22.2%00.0%UnchangedHolders
Q3 2024140,600$64.7M22.7%00.0%UnchangedHolders
Q2 2024140,600$57.2M21.8%00.0%UnchangedHolders
Q1 2024140,600$59.1M22.6%00.0%UnchangedHolders
Q4 2023140,600$50.1M21.9%00.0%UnchangedHolders
Q3 2023140,600$49.3M24.3%00.0%UnchangedHolders
Q2 2023140,600$47.9M22.9%00.0%UnchangedHolders
Q1 2023140,600$43.4M22.5%00.0%UnchangedHolders
Q4 2022140,600$43.4M23.4%00.0%UnchangedHolders
Q3 2022140,600$37.5M22.8%–No prior filingHolders