Stocks/Funds/CIK 1953324

Aquamarine Zurich AG

long-term holderconcentrated
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1953324
Assets
$135M
-53.9% YoY
Holdings
7
Lifetime alpha vs market
+1.96% annual
Average hold time
3.8 yr
median 3.8 yr

Quarterly history

Cum return +104% vs S&P +91% · α +13% lifetimeAUM $135M · peak $317MFlow $7M (+5%)2022-092023-062024-032024-122025-092026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-5.00%
trims when stocks drop
when a holding falls −10%+
Middle response
-1.88%
baseline attrition
Rally response
-9.40%
trims into rallies
when a holding rises +10%+

Top positions · 7

Ticker$ value% portYoYHold time
BRK-BBerkshire Hathaway Inc.$47M34.6%3.8 yr
BRK-ABerkshire Hathaway Inc.$22M15.9%3.8 yr
MAMastercard Incorporated$20M14.8%-8.5%3.8 yr
AXPAmerican Express Company$20M14.5%+13.3%3.8 yr
MCOMoody's Corporation$12M8.7%-5.6%3.8 yr
RACEFerrari N.V.$10M7.4%-20.3%3.8 yr
DJCODaily Journal Corporatio$6M4.1%+21.3%3.8 yr

Portfolio composition (YoY)

Industry mix
Insurance - Diversified50.5%+16.8pp$68M
Financial - Credit Services29.3%-2.2pp$40M
Financial - Data & Stock Exchanges8.7%+4.4pp$12M
Auto - Manufacturers7.4%-0.6pp$10M
Software - Application4.1%+2.5pp$6M
Country
US92.6%+2.7pp
IT7.4%-0.6pp
Top 5: 88.5% · Top 10: 100.0% · Top 25: 100.0%

Winners

TickerPrev $PnLYoY %
AXP$57M+0.01B13.3%
DJCO$5M+0.00B21.3%
MCO$13M-0.00B-5.6%
MA$36M-0.00B-8.5%
RACE$24M-0.01B-20.3%

Losers

TickerPrev $PnLYoY %
RACE$24M-0.01B-20.3%
MA$36M-0.00B-8.5%
MCO$13M-0.00B-5.6%

Top buys this quarter · 0

No buys this quarter

Top sells this quarter · 0

No sells this quarter

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$135M7+11.75%+17.59%-5.85%+0.01B
2025-12-31$148M7+24.88%+17.72%+7.17%-0.18B
2025-09-30$317M14+22.93%+17.52%+5.41%-0.02B
2025-06-30$310M14+21.66%+14.94%+6.72%-0.03B
2025-03-31$294M14+6.27%+8.30%-2.03%+0.01B
2024-12-31$288M14+30.39%+24.89%+5.50%-0.00B
2024-09-30$286M14+51.62%+36.04%+15.58%+0.00B
2024-06-30$263M14+32.64%+24.49%+8.15%+0.00B
2024-03-31$262M12+43.18%+29.62%+13.55%-0.01B
2023-12-31$229M12+28.07%+26.18%+1.89%-0.01B
2023-09-30$203M12+21.93%+21.57%+0.36%+0.01B
2023-06-30$210M12+7.72%+8.68%-0.96%+0.00B
2023-03-31$193M12+6.42%+7.46%-1.04%-0.00B
2022-12-31$186M12+12.87%+7.56%+5.31%+0.00B
2022-09-30$163M11