Mitsui Sumitomo Insurance Co. Ltd., 10% Owner at BERKLEY W R CORP (WRB), bought 516,352 shares at $72.29 ($37.5M) on 2026-03-02, disclosed to the SEC on 2026-03-03.
Open-market purchase of $37.5M WRB by 10% Owner. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history). Context: insider career grade B.
Negative factors outweigh the positive ones.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $72.29 | 45,103 | $3.3M | 8.7% |
| 2 | $72.29 | 45,103 | $3.3M | 8.7% |
| 3 | $73.20 | 100,897 | $7.4M | 19.7% |
| 4 | $73.20 | 100,897 | $7.4M | 19.7% |
| 5 | $71.60 | 38,991 | $2.8M | 7.4% |
| 6 | $71.60 | 38,991 |
| $2.8M |
| 7.4% |
| 7 | $72.52 | 73,185 | $5.3M | 14.2% |
| 8 | $72.52 | 73,185 | $5.3M | 14.2% |
| Total | $72.61 avg | 516,352 | $37.5M | 100% |
| Filing → |
| WRB | BUY | 2026-02-18 | $80.3M | — | Filing → |
| WRB | BUY | 2026-02-13 | $2.8M | — | Filing → |
| WRB | BUY | 2026-02-11 | $6.8M | — | Filing → |