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Super Investors / Mitsui Sumitomo Insurance Co Ltd
MS

Mitsui Sumitomo Insurance Co Ltd

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$4.15B
Positions
1
Quarter ended
June 30, 2026
Filed
August 13, 2026

Reported portfolio value by quarter (3 quarters reported)

$4.15B $3.54B
Q4 25 Q1 26 Q2 26

$3.54B in Q4 2025 → $4.15B now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
W. R. Berkley Corporation 100.0% Unchanged 58,780,450 $4.15B

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 2 quarters.

Q2 2026

quarter ended June 30, 2026 · filed August 13, 2026

No position changes this quarter.

Q1 2026

quarter ended March 31, 2026 · filed May 14, 2026

Company Action Shares changed Value of change % of portfolio
W. R. Berkley Corporation Added +8,253,939 +$547M 100.0%

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