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Aquamarine Fund 13F Holdings and Portfolio Changes
Aquamarine Fund reported $144.1M in 13F securities for Q2 2026, with 7 positions. Values are as of the report date; option positions, when present, use underlying-security values. This is not complete fund assets or investment performance.
Open interactive portfolioLatest 13F portfolio changes
New or increased positions are not listed in the available comparison data. Reduced or exited positions are not listed in the available comparison data. These are comparisons between reported positions, not a record of execution dates, prices or cash traded.
Latest filing metadata: quarter Q2 2026; report date 2026-06-30; filing date 2026-07-10; disclosure source SEC 13F.
Reported holdings and concentration
Aquamarine Fund's Q2 2026 13F report contains 7 positions valued at $144.1M. The largest reported holdings include Berkshire Hathaway, BERKSHIRE HATHAWAY INC DEL, AMERICAN EXPRESS, MASTERCARD INCORPORATED, and MOODYS.
The three largest positions in the holdings table account for approximately 64.7% of reported 13F value. The largest reported sector exposure is Financials at 79.0% of the disclosed portfolio.
The filing metadata lists report date 2026-06-30, filing date 2026-07-10, SEC accession 0001953324-26-000003. SEC 13F reports are normally published up to 45 days after quarter end, so the data is best used to understand institutional positioning after the fact rather than to infer today's exact portfolio.
Open the interactive portfolio to search all Aquamarine Fund positions and inspect stock and option tables, historical reports and individual stock holders.
Aquamarine Fund portfolio analytics
the top five positions account for 87.5% of disclosed value; the largest sector exposure is Financials at 79.0%; latest prices differ from modeled cost estimates by an average 194.5% across 7 tracked positions (estimated costs, not reported purchase prices or actual investment returns).
Top reported holdings
| Holding | Reported value | Weight | Quarter change |
|---|---|---|---|
| BRK.B whale holders BERKSHIRE HATHAWAY INC DEL | $48.8M | 33.9% | Held |
| BRK-A whale holders BERKSHIRE HATHAWAY INC DEL | $22.5M | 15.6% | Held |
| AXP whale holders AMERICAN EXPRESS CO | $22.0M | 15.3% | Held |
| MA whale holders MASTERCARD INCORPORATED | $20.5M | 14.3% | Held |
| MCO whale holders MOODYS CORP | $12.2M | 8.5% | Held |
| RACE whale holders FERRARI N V | $11.1M | 7.7% | Held |
| DJCO whale holders DAILY JOURNAL CORP | $6.9M | 4.8% | Held |
New and increased positions
No reported items for this period.
Reduced and exited positions
No reported items for this period.
Allocation
- Financials: 79.0%
- Other: 13.3%
- Consumer Discretionary: 7.7%
Data notes
Report date: 2026-06-30
Disclosure source: SEC 13F
Read the original SEC filing (0001953324-26-000003)
SEC 13F filings are delayed public disclosures and do not include every asset class, short positions, or real-time trades.
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Questions about this 13F filing
What does Aquamarine Fund report for Q2 2026?
The filing reports 7 positions and $144.1M in 13F securities. The holdings table shows reported values and weights; option values follow the filing's reporting conventions.
What changed between filings?
New or increased positions are not listed in the available comparison data. Reduced or exited positions are not listed in the available comparison data.
Do these amounts show how much was bought or sold?
No. The change lists are ranked by reported position value. Exited positions use their value in the prior report. These amounts are not execution prices, cash invested or sale proceeds.
Is this the current portfolio?
No. Form 13F is a quarter-end snapshot, generally filed within 45 days of quarter end. It excludes short positions and does not cover every asset. Compare the report date and filing date before using the data.