Mitsui Sumitomo Insurance Co Ltd

13F Portfolio Filings

Most recent 13F
Q2 2026
13D/G filings
13D on 1 security
Location
Tokyo, Japan
CIK
0001142206
All SEC filings
View on sec.gov
Holdings Value
Quarter Holdings Value ($000) Top Holdings Form Type Date Filed Filing ID
Q2 2026 1 4,145,785 WRB 13F-HR 8/13/2026 000119312526347771
Q1 2026 1 3,895,968 WRB 13F-HR 5/14/2026 000119312526222668
Q4 2025 1 3,542,918 WRB 13F-HR 2/17/2026 000119312526052090

13D and 13G Filings

All 13D and 13G filings

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each security where the latest filing since 12/18/2024 is a 13D, newest first.

Issuer % of Class Filed
W. R. Berkley Corporation 13D/A
WRB · 084423102
15.8% 6/4/2026
Event 6/3/2026