Mitsui Sumitomo Insurance Co Ltd: insider buys
Every open-market stock purchase reported by Mitsui Sumitomo Insurance Co Ltd to the SEC on Form 4.
Total bought$332.66M
Purchases9
Companies1
Last purchase filedMar 3, 2026
Return on these buys+5.8%
Mitsui Sumitomo Insurance Co Ltd has made 9 open-market purchases worth $332.66M in 1 company since Dec 29, 2025, according to SEC Form 4 filings. The most recent was filed on Mar 3, 2026: 258,176 shares of WRB at $72.61 (10% Owner), worth $18.75M. The largest was $62.04M of WRB on Dec 23, 2025. Taken together, these purchases are up 6% at the latest closing prices (split-adjusted, weighted by amount).
Companies Mitsui Sumitomo Insurance Co Ltd bought
| Ticker | Company | Role | Buys | Total | Since buy | Last filed |
|---|---|---|---|---|---|---|
| WRB | Berkley W R Corp | 10% Owner | 9 | $332.66M | +5.8% | Mar 3 |
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| Filed | Stock | Insider | Value | Shares | Price | Since buy | Stake | Trade | |
|---|---|---|---|---|---|---|---|---|---|
| Mar 3 | WRBBerkley W R Corp | Mitsui Sumitomo Insurance Co…10b5-110% Owner | $18.75M | 258,176 | $72.61 | +1.7% | +0% | Mar 2 | SEC |
| Feb 27 | WRBBerkley W R Corp | Mitsui Sumitomo Insurance Co…10b5-110% Owner | $21.50M | 300,000 | $71.65 | +3.1% | +0% | Feb 26 | SEC |
| Feb 18 | WRBBerkley W R Corp | Mitsui Sumitomo Insurance Co…10b5-110% Owner | $40.16M | 566,386 | $70.91 | +4.2% | +1% | Feb 17 | SEC |
| Feb 4 | WRBBerkley W R Corp | Mitsui Sumitomo Insurance Co…10b5-110% Owner | $21.45M | 315,221 | $68.05 | +8.5% | +1% | Feb 2 | SEC |
| Jan 30 | WRBBerkley W R Corp | Mitsui Sumitomo Insurance Co…10b5-110% Owner | $33.09M | 485,000 | $68.22 | +8.3% | +1% | Jan 29 | SEC |
| Jan 14 | WRBBerkley W R Corp | Mitsui Sumitomo Insurance Co…10b5-110% Owner | $55.62M | 811,041 | $68.58 | +7.7% | +2% | Jan 12 | SEC |
| Jan 9 | WRBBerkley W R Corp | Mitsui Sumitomo Insurance Co…10b5-110% Owner | $32.64M | 470,000 | $69.45 | +6.4% | +1% | Jan 8 | SEC |
| Jan 7 | WRBBerkley W R Corp | Mitsui Sumitomo Insurance Co…10b5-110% Owner | $47.42M | 681,218 | $69.61 | +6.1% | +1% | Jan 5 | SEC |
| Dec 29 | WRBBerkley W R Corp | Mitsui Sumitomo Insurance Co…10b5-110% Owner | $62.04M | 879,573 | $70.53 | +4.7% | +2% | Dec 23 | SEC |