🕵️ Berkley W R Corp ($WRB-PG)
SEC insider & ownership activity, last 12 months · CIK 11544 · every row links its SEC filing
Over the last 12 months insiders bought $705.5M with no open-market selling against it. Mitsui Sumitomo Insurance Co., Ltd. bought $705.5M through a 10b5-1 trading plan in 94 lots (Dec–Mar). William R. Berkley added 25.1% → 25.5%; Mitsui Sumitomo Insurance Co., Ltd. added 15.7% → 15.8%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $705.5M (94 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Mitsui Sumitomo Insurance Co., Ltd. | 94 | $705.5M | 0 | – | Mar 3, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| WR Berkley & Others LLC | 25.7% | 13D | Jul 17, 2026 | filing ↗ | |
| WR Berkley & Others 2 LLC | 25.7% | 13D | Jul 17, 2026 | filing ↗ | |
| Estate of William R. Berkley | 25.7% | 13D | Jul 17, 2026 | filing ↗ | |
| Marjorie J. Berkley | 25.7% | 13D | Jul 17, 2026 | filing ↗ | |
| The William R. Berkley 2011 GST Trust U/A Dated December 20, 2011 | 25.7% | 13D | Jul 17, 2026 | filing ↗ | |
| The William R. Berkley 2022 Family Trust F/B/O William R. Berkley, JR. and HIS Issue | 25.7% | 13D | Jul 17, 2026 | filing ↗ | |
| The William R. Berkley 2022 Family Trust F/B/O Lauren Berkley and HER Issue | 25.7% | 13D | Jul 17, 2026 | filing ↗ | |
| W. Robert Berkley, JR. | 25.7% | 13D | Jul 17, 2026 | filing ↗ | |
| William R. Berkley | 25.5% | 13D | Mar 4, 2026 | filing ↗ | |
| Mitsui Sumitomo Insurance Co., Ltd. | 15.8% | 13D | Jun 3, 2026 | filing ↗ | |
| MS&AD Insurance Group Holdings, Inc. | 15.8% | 13D | Jun 3, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.8% | 13G | Apr 30, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jul 20, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 20, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 26, 2026 | filing ↗ |
| Material agreement (1.01) | Jun 9, 2026 | filing ↗ |
| New financial obligation (2.03) | Jun 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 9, 2026 | filing ↗ |
| Other events (8.01) | Jun 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 9, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 3, 2026 | filing ↗ |
| Earnings (2.02) | Apr 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 21, 2026 | filing ↗ |
| Earnings (2.02) | Jan 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 26, 2026 | filing ↗ |
| Other events (8.01) | Dec 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 5, 2025 | filing ↗ |
| Earnings (2.02) | Oct 20, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 20, 2025 | filing ↗ |