Mitsui Sumitomo Insurance Co Ltd

Tokyo, M0 · CIK 1142206 · 13F filing filed 2026-08-13

No investment adviser registration (Form ADV) found for this filer. It may be a parent company whose subsidiaries are the registered advisers, a bank or insurer, or a manager based outside the US.

$4.1bn reported value +6.4% vs Q1 2026

1positions

100.0%in top 10

0 new 0 added 0 reduced 0 sold out vs Q1 2026

This report includes the holdings of 1 other manager that shares the investment decisions:

MS&AD Insurance Group Holdings, Inc. – no 13F of its own this quarter

Shares in two reports are counted once in each security's totals.

Holdings, Q2 2026

The small lines show how much was held over the last 4 quarters (adjusted for stock splits).

#	Security	Ticker	Shares	Value	% of portfolio	Change	Shares change
1	BERKLEY W R CORP COM WRB	WRB	58,780,450	$4.1bn100.00%	100.00%	Unchanged

Stakes above 5%

Companies where this manager has reported owning more than 5% of a class of shares, on Schedule 13D (may seek influence) or 13G (passive): its latest filing for each, from 19 Dec 2024 on.

Company	Ticker	Stake	Change	Schedule	Last filed
BERKLEY W R CORP WRB · 13D · filed 2026-06-04	WRB	15.8%≈ $4.1bn	+0.1 pts	13D	2026-06-04