Mitsui Sumitomo Insurance Co Ltd Insider Trading Activity
Mitsui Sumitomo Insurance Co Ltd, an institutional filer, recorded 94 transactions over the last 12 months across 1 company totaling $705.5M.
Activity concentrated in WRB with 94 filings. The largest single transaction was a purchase of WRB for $22.3M on Jan 22, 2026.
Performance Scorecard
Forward stock performance after each transaction by Mitsui Sumitomo Insurance Co Ltd. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.
| PERIOD | AVG BUY RETURN | AVG SELL AVOIDED | SUCCESS RATE | TRADES |
|---|---|---|---|---|
| 30 days | -1.0% | — | 43% | 94 |
| 90 days | -4.6% | — | 4% | 94 |
| 120 days | -3.5% | — | 9% | 94 |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersWRB · BERKLEY W R CORP
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Showing the 50 most recent of 94 disclosed trades.
| DATE | TICKER | TYPE | SHARES | PRICE | VALUE | Δ OWNED | ROLE | FILING |
|---|---|---|---|---|---|---|---|---|
Mar 3, 2026 | WRB | Buy | 38,991 | $71.60 | $2.8M | +0.1% | 10%+ Owner | |
Mar 3, 2026 | WRB | Buy | 73,185 | $72.52 | $5.3M | +0.1% | 10%+ Owner | |
Mar 2, 2026 | WRB | Buy | 45,103 | $72.29 | $3.3M | +0.1% | 10%+ Owner | |
Mar 2, 2026 | WRB | Buy | 100,897 | $73.20 | $7.4M | +0.2% | 10%+ Owner | |
Feb 27, 2026 | WRB | Buy | 147,000 | $71.63 | $10.5M | +0.3% | 10%+ Owner | |
Feb 26, 2026 | WRB | Buy | 145,491 | $71.65 | $10.4M | +0.2% | 10%+ Owner | |
Feb 26, 2026 | WRB | Buy | 7,509 | $72.11 | $542K | +0.0% | 10%+ Owner | |
Feb 25, 2026 | WRB | Buy | 14,356 | $71.77 | $1.0M | +0.0% | 10%+ Owner | |
Feb 25, 2026 | WRB | Buy | 154,512 | $71.39 | $11.0M | +0.3% | 10%+ Owner | |
Feb 24, 2026 | WRB | Buy | 103,192 | $70.52 | $7.3M | +0.2% | 10%+ Owner | |
Feb 24, 2026 | WRB | Buy | 61,594 | $71.28 | $4.4M | +0.1% | 10%+ Owner | |
Feb 23, 2026 | WRB | Buy | 16,410 | $71.80 | $1.2M | +0.0% | 10%+ Owner | |
Feb 23, 2026 | WRB | Buy | 203,590 | $71.09 | $14.5M | +0.4% | 10%+ Owner | |
Feb 20, 2026 | WRB | Buy | 160,582 | $70.80 | $11.4M | +0.3% | 10%+ Owner | |
Feb 19, 2026 | WRB | Buy | 44,014 | $71.50 | $3.1M | +0.1% | 10%+ Owner | |
Feb 19, 2026 | WRB | Buy | 300,986 | $70.53 | $21.2M | +0.5% | 10%+ Owner | |
Feb 18, 2026 | WRB | Buy | 239,750 | $70.58 | $16.9M | +0.4% | 10%+ Owner | |
Feb 18, 2026 | WRB | Buy | 45,250 | $70.96 | $3.2M | +0.1% | 10%+ Owner | |
Feb 17, 2026 | WRB | Buy | 281,386 | $71.19 | $20.0M | +0.5% | 10%+ Owner | |
Feb 13, 2026 | WRB | Buy | 280 | $71.18 | $20K | +0.0% | 10%+ Owner | |
Feb 13, 2026 | WRB | Buy | 15,406 | $69.73 | $1.1M | +0.0% | 10%+ Owner | |
Feb 13, 2026 | WRB | Buy | 4,314 | $70.30 | $303K | +0.0% | 10%+ Owner | |
Feb 12, 2026 | WRB | Buy | 2,401 | $72.76 | $175K | +0.0% | 10%+ Owner | |
Feb 12, 2026 | WRB | Buy | 17,599 | $71.88 | $1.3M | +0.0% | 10%+ Owner | |
Feb 11, 2026 | WRB | Buy | 11,163 | $71.45 | $798K | +0.0% | 10%+ Owner | |
Feb 11, 2026 | WRB | Buy | 9,289 | $69.59 | $646K | +0.0% | 10%+ Owner | |
Feb 11, 2026 | WRB | Buy | 3,578 | $70.50 | $252K | +0.0% | 10%+ Owner | |
Feb 10, 2026 | WRB | Buy | 12,082 | $69.92 | $845K | +0.0% | 10%+ Owner | |
Feb 10, 2026 | WRB | Buy | 21,884 | $69.09 | $1.5M | +0.0% | 10%+ Owner | |
Feb 9, 2026 | WRB | Buy | 35,952 | $69.27 | $2.5M | +0.1% | 10%+ Owner | |
Feb 9, 2026 | WRB | Buy | 4,048 | $70.32 | $285K | +0.0% | 10%+ Owner | |
Feb 6, 2026 | WRB | Buy | 15,694 | $70.46 | $1.1M | +0.0% | 10%+ Owner | |
Feb 6, 2026 | WRB | Buy | 4,306 | $71.39 | $307K | +0.0% | 10%+ Owner | |
Feb 5, 2026 | WRB | Buy | 6,528 | $70.79 | $462K | +0.0% | 10%+ Owner | |
Feb 5, 2026 | WRB | Buy | 13,472 | $71.25 | $960K | +0.0% | 10%+ Owner | |
Feb 4, 2026 | WRB | Buy | 2,585 | $69.77 | $180K | +0.0% | 10%+ Owner | |
Feb 4, 2026 | WRB | Buy | 22,415 | $70.25 | $1.6M | +0.0% | 10%+ Owner | |
Feb 3, 2026 | WRB | Buy | 8,347 | $67.75 | $565K | +0.0% | 10%+ Owner | |
Feb 3, 2026 | WRB | Buy | 31,653 | $68.87 | $2.2M | +0.1% | 10%+ Owner | |
Feb 2, 2026 | WRB | Buy | 237,062 | $67.71 | $16.1M | +0.4% | 10%+ Owner | |
Feb 2, 2026 | WRB | Buy | 13,159 | $68.42 | $900K | +0.0% | 10%+ Owner | |
Jan 30, 2026 | WRB | Buy | 195,000 | $68.36 | $13.3M | +0.3% | 10%+ Owner | |
Jan 29, 2026 | WRB | Buy | 262,282 | $68.08 | $17.9M | +0.5% | 10%+ Owner | |
Jan 29, 2026 | WRB | Buy | 27,718 | $68.56 | $1.9M | +0.0% | 10%+ Owner | |
Jan 28, 2026 | WRB | Buy | 28,577 | $67.89 | $1.9M | +0.1% | 10%+ Owner | |
Jan 28, 2026 | WRB | Buy | 280,354 | $67.58 | $18.9M | +0.5% | 10%+ Owner | |
Jan 27, 2026 | WRB | Buy | 11,987 | $66.87 | $802K | +0.0% | 10%+ Owner | |
Jan 27, 2026 | WRB | Buy | 800 | $65.86 | $53K | +0.0% | 10%+ Owner | |
Jan 27, 2026 | WRB | Buy | 325,960 | $67.40 | $22.0M | +0.6% | 10%+ Owner | |
Jan 27, 2026 | WRB | Buy | 8,582 | $68.56 | $588K | +0.0% | 10%+ Owner |
Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| WRB | BERKLEY W R CORP | 94 | $705.5M |