Stocks/Funds/CIK 1142206

MITSUI SUMITOMO INSURANCE CO LTD

concentrated
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1142206
Assets
$3.90B
Holdings
1
Lifetime alpha vs market
-4.06% annual
Average hold time
0.5 yr
median 0.5 yr

Quarterly history

Cum return -5% vs S&P -4% · α -1% lifetimeAUM $3.9B · peak $3.9BFlow $543M (+15%)2025-122026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
—
—
when a holding falls −10%+
Middle response
+14.04%
steady accumulation
Rally response
—
—
when a holding rises +10%+

Top positions · 1

Ticker$ value% portYoYHold time
WRBW. R. Berkley Corporatio$3.90B100.0%—0.5 yr

Portfolio composition (YoY)

Industry mix
Insurance - Property & Casualty100.0%$3.90B
Country
US100.0%
Top 5: 100.0% · Top 10: 100.0% · Top 25: 100.0%

Winners

TickerPrev $PnLYoY %

Losers

TickerPrev $PnLYoY %

Top buys this quarter · 1

WRB W. R. Berkley Corporation+$547M

Top sells this quarter · 0

No sells this quarter

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$3.90B1-5.35%-4.37%-0.98%+0.54B
2025-12-31$3.54B1————