Aquamarine (Guy Spier)
Aquamarine Zurich AG · CIK 0001953324 · ZURICH, V8 · Quarter end: 2026-06-30 · Filed on: 2026-07-10 · Open the SEC source ↗Value Investor
Portfolio Value (AUM)Total value of the fund's US stock portfolio reported to the SEC.
$144.1K
2026 Q2
Positions
7
Top-10 ConcentrationHow much of the portfolio sits in the 10 largest holdings. High = concentrated bets.
100.0%
Est. Net Flow (Q)
—
2026 Q2
Top Holdings
BRK-B
BERKSHIRE HATHAWAY INC DEL
33.9%
BRK-A
BERKSHIRE HATHAWAY INC DEL
15.6%
AXP
AMERICAN EXPRESS CO
15.3%
MA
MASTERCARD INCORPORATED
14.3%
MCO
MOODYS CORP
8.5%
RACE
FERRARI N V
7.7%
DJCO
DAILY JOURNAL CORP
4.8%
New / Increased
No prior quarter data
Reduced / Exited
No prior quarter data
Related managers
Five closest superinvestors by Jaccard overlap of tickers held in the latest quarter (computed nightly).
| Manager | Overlap | Shared holdings |
|---|---|---|
| Valley Forge Capital (Dev Kantesaria) | 16.7% | MCO, MA |
| Akre Capital Management | 13.0% | MCO, BRK-B, MA |
| Fairholme Capital (Bruce Berkowitz) | 11.1% | BRK-B, BRK-A |
| Punch Card Management (Norbert Lou) | 9.1% | BRK-A |
| Chou Associates (Francis Chou) | 8.6% | MCO, BRK-B, BRK-A |
Read the 2026-Q2 quarterly report · 13F Filing Calendar
13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.