Mitsui Sumitomo Insurance Co Ltd bought $62M of WRB
owner at BERKLEY W R CORP. 879,573 shares at an average of $70.53, traded Dec 23, 2025, filed Dec 29, 2025.
Score components
- +12Role10% owner
- +25Trade size$62.0M at market
- 0Relative to holdingsHoldings up 1.8%
- 0Price contextNear the top of the 52-week range
- 0ClusterNo other insider buying within 14 days
- +5Repeat buying2 buys in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
- -1510b5-1 planPre-scheduled under a 10b5-1 plan
- -5Outside holderA 10% owner who is not an officer or director
What happened after comparable buys
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m -4.4%, 3m -6.3%, 6m +1.3%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001193125-25-335622, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Dec 23, 2025 | POpen-market purchase Common Stock10b5-1 | +232,546 | $70.31 | $16M | 49,444,484 | Dec 29, 2025 |
| Dec 23, 2025 | POpen-market purchase Common Stock10b5-1 | +2,027 | $71.15 | $144k | 49,446,511 | Dec 29, 2025 |
| Dec 24, 2025 | POpen-market purchase Common Stock10b5-1 | +220,000 | $70.51 | $16M | 49,666,511 | Dec 29, 2025 |
| Dec 26, 2025 | POpen-market purchase Common Stock10b5-1 | +220,000 | $70.56 | $16M | 49,886,511 | Dec 29, 2025 |
| Dec 29, 2025 | POpen-market purchase Common Stock10b5-1 | +205,000 | $70.77 | $15M | 50,091,511 | Dec 29, 2025 |
Related signals
Other insiders at BERKLEY W R CORP and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 17Weak | BERKLEY W R CORP | Mitsui Sumitomo Insurance Co Ltd owner | $19M 258,176 shares | +0% | |
| 17Weak | BERKLEY W R CORP | Mitsui Sumitomo Insurance Co Ltd owner | $21M 300,000 shares | +1% | |
| 17Weak | BERKLEY W R CORP | Mitsui Sumitomo Insurance Co Ltd owner | $39M 553,654 shares | +1% | |
| 17Weak | BERKLEY W R CORP | Mitsui Sumitomo Insurance Co Ltd owner | $36M 505,582 shares | +1% | |
| 22Weak | BERKLEY W R CORP | Mitsui Sumitomo Insurance Co Ltd owner | $40M 566,386 shares | +1% | |
| 17Weak | BERKLEY W R CORP | Mitsui Sumitomo Insurance Co Ltd owner | $2.8M 40,000 shares | +0% | |
| 17Weak | BERKLEY W R CORP | Mitsui Sumitomo Insurance Co Ltd owner | $6.8M 97,996 shares | +0% | |
| 17Weak | BERKLEY W R CORP | Mitsui Sumitomo Insurance Co Ltd owner | $2.8M 40,000 shares | +0% | |
| 17Weak | BERKLEY W R CORP | Mitsui Sumitomo Insurance Co Ltd owner | $21M 315,221 shares | +1% | |
| 17Weak | BERKLEY W R CORP | Mitsui Sumitomo Insurance Co Ltd owner | $33M 485,000 shares | +1% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.