MITSUI SUMITOMO INSURANCE CO LTD
SEC Form 4 insider trading activity
MITSUI SUMITOMO INSURANCE CO LTD has filed 20 SEC Form 4 filings (94 transaction rows) across 1 company, with disclosures dating back to 2025. 20 of those filings fall inside the rolling window. Most recent filing: Mar 3, 2026.
On the most recent filing, MITSUI SUMITOMO INSURANCE CO LTD is listed as 10% Owner at BERKLEY W R CORP. Inside the rolling window, MITSUI SUMITOMO INSURANCE CO LTD reported 50 open-market purchases totaling $705.5M in WRB and no open-market sales. The largest disclosed transaction in the window is a purchase of 370,000 WRB shares on Jan 26, 2026, worth $24.8M.
Companies traded
Other insiders at WRB
Insider Buying
$705.5M
reported purchases (SEC code P)
Insider Selling
$0
reported sales (SEC code S)
Companies
1
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| WRB | 10% Owner | Purchase | 146,000 | $10.6M | Mar 3 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 112,176 | $8.1M | Mar 3 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 153,000 | $11.0M | Feb 27 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 147,000 | $10.5M | Feb 27 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 220,000 | $15.7M | Feb 25 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 164,786 | $11.7M | Feb 25 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 168,868 | $12.1M | Feb 25 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 345,000 | $24.4M | Feb 20 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 160,582 | $11.4M | Feb 20 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 281,386 | $20.0M | Feb 18 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 285,000 | $20.1M | Feb 18 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 20,000 | $1.4M | Feb 13 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 20,000 | $1.4M | Feb 13 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 40,000 | $2.8M | Feb 11 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 33,966 | $2.4M | Feb 11 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 24,030 | $1.7M | Feb 11 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 20,000 | $1.4M | Feb 6 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 20,000 | $1.4M | Feb 6 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 250,221 | $17.0M | Feb 4 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 40,000 | $2.7M | Feb 4 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 25,000 | $1.8M | Feb 4 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 290,000 | $19.8M | Jan 30 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 195,000 | $13.3M | Jan 30 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 370,000 | $24.8M | Jan 28 | SEC ↗ | |
| WRB | 10% Owner | Purchase | 350,000 | $23.6M | Jan 28 | SEC ↗ |
Frequently asked questions
How many SEC Form 4 filings has MITSUI SUMITOMO INSURANCE CO LTD made?
MITSUI SUMITOMO INSURANCE CO LTD has filed 20 SEC Form 4 filings (94 transaction rows) across 1 company since 2025.
Which companies does MITSUI SUMITOMO INSURANCE CO LTD trade?
MITSUI SUMITOMO INSURANCE CO LTD has filed SEC Form 4 disclosures for 1 company, including WRB.
When was MITSUI SUMITOMO INSURANCE CO LTD's most recent SEC Form 4 filing?
MITSUI SUMITOMO INSURANCE CO LTD's most recent SEC Form 4 filing on Tracefour is dated Mar 3, 2026.
What is MITSUI SUMITOMO INSURANCE CO LTD's total buy and sell value in the current window?
Inside the rolling retention window, MITSUI SUMITOMO INSURANCE CO LTD bought $705.5M and sold $0 based on SEC Form 4 filings.
What was MITSUI SUMITOMO INSURANCE CO LTD's largest disclosed transaction?
The largest disclosed transaction in the current window is a purchase of 370,000 WRB shares on 2026-01-26, worth $24.8M, per SEC Form 4 filings.