W. R. Berkley Corporation (WRB)10% owner bought ~$2.49M

~$2.49M

Approx. value · 36K sh @ $69.27

56.5M

Holds after · shares reported

Traded

Feb 9, 2026

Filed

Feb 12, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Jan 9, 2026Insider · 1 personInsiders: 3 purchases (~$19.0M)
2. Jan 12, 2026Insider · 14 days before results10% owner purchased ~$17.6M of WRB shares in the open market
3. Jan 13, 2026Insider · 1 personInsiders: 2 purchases (~$22.1M)
4. Jan 14, 20265% stakeMitsui Sumitomo Insurance Co., Ltd. filed an activist stake (13D) of 13.9%
5. Jan 14, 2026Insider · 1 personInsiders: 2 purchases (~$15.9M)
6. Jan 15, 2026Insider · 1 personInsiders: 2 purchases (~$16.2M)
7. Jan 16, 2026Insider · 1 personInsiders: 2 purchases (~$20.5M)
8. Jan 20, 2026Insider · 1 personInsiders: 2 purchases (~$21.0M)
9. Jan 20, 2026CongressDisclosed partial sale of WRB — reported range $1,001 - $15,000
10. Jan 21, 2026Insider · 1 personInsiders: 2 purchases (~$21.6M)
11. Jan 22, 2026Insider · Largest insider buy since 200610% owner purchased ~$22.3M of WRB shares in the open market
12. Jan 23, 2026Insider · 1 personInsiders: 2 purchases (~$24.6M)
13. Jan 26, 2026Company filing · Form 8-K · ResultsReported its results
14. Jan 26, 2026Insider · 1 personInsiders: 2 purchases (~$24.8M)
15. Jan 27, 2026Insider · 1 personInsiders: 5 purchases (~$23.6M)
16. Jan 28, 2026Insider · 1 personInsiders: 2 purchases (~$20.9M)
17. Jan 29, 2026Insider · 1 personInsiders: 2 purchases (~$19.8M)
18. Jan 30, 2026Insider10% owner purchased ~$13.3M of WRB shares in the open market
19. Feb 2, 2026Insider · 1 personInsiders: 2 purchases (~$17.0M)
20. Feb 3, 2026Insider · 1 personInsiders: 2 purchases (~$2.7M)
21. Feb 4, 2026Insider · 1 personInsiders: 2 purchases (~$1.8M)
22. Feb 5, 2026Insider · 1 personInsiders: 2 purchases (~$1.4M)
23. Feb 6, 20265% stakeMitsui Sumitomo Insurance Co., Ltd. filed an activist stake (13D) of 14.9%
24. Feb 6, 2026Insider · 1 personInsiders: 2 purchases (~$1.4M)
25. Feb 9, 2026 · this disclosureInsider10% owner purchased ~$2.49M of WRB shares in the open market

What came next

1. Feb 9, 2026Insider10% owner purchased ~$285K of WRB shares in the open market
2. Feb 10, 2026Insider · 1 personInsiders: 2 purchases (~$2.4M)
3. Feb 11, 2026Insider · 1 personInsiders: 3 purchases (~$1.7M)
4. Feb 12, 2026Insider · 1 personInsiders: 2 purchases (~$1.4M)
5. Feb 13, 2026Insider · 1 personInsiders: 3 purchases (~$1.4M)
6. Feb 17, 2026Insider10% owner purchased ~$20M of WRB shares in the open market
7. Feb 18, 2026Insider · 1 personInsiders: 2 purchases (~$20.1M)
8. Mar 5, 20265% stakeMitsui Sumitomo Insurance Co., Ltd. filed an activist stake (13D) of 15.7%
9. Mar 5, 20265% stakeWR Berkley & Others LLC filed an activist stake (13D) of 25.5%
10. Mar 27, 20265% stakeThe Vanguard Group reported a passive stake (13G)
11. Apr 21, 2026Company filing · Form 8-K · ResultsReported its results
12. Apr 30, 20265% stakeVanguard Capital Management reported a passive stake (13G) of 5.8%
13. Jun 4, 20265% stakeMitsui Sumitomo Insurance Co., Ltd. filed an activist stake (13D) of 15.8%

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for W. R. Berkley Corporation

For W. R. Berkley Corporation, OQRO holds 7 fund holdings reports (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its WRB page.

Other recent filings by MITSUI SUMITOMO INSURANCE CO LTD, 10% owner

• SEC Form 4 at W. R. Berkley Corporation (WRB)Mar 4, 2026
• SEC Form 4 at W. R. Berkley Corporation (WRB)Mar 4, 2026
• SEC Form 4 at W. R. Berkley Corporation (WRB)Mar 4, 2026
• SEC Form 4 at W. R. Berkley Corporation (WRB)Mar 4, 2026
• SEC Form 4 at W. R. Berkley Corporation (WRB)Feb 28, 2026

The full history of MITSUI SUMITOMO INSURANCE CO LTD, 10% owner is on the profile page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at W. R. Berkley Corporation

• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 13, 2026
• SEC Form 13F-HRAug 10, 2026
• SEC Form 13F-HRJul 29, 2026

Everything OQRO holds on this company is on its WRB page.