According to recent filings covering the 90 days ending February 19, 2026, the three most significant insider holders at Berkley W R are TenPercentOwner Sumitomo Insurance Co Ltd Mitsui (56.60Mn shares), Executive Chairman William R Berkley (17.36Mn shares), President And Ceo William R Jr Berkley (4.55Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Sumitomo Insurance Co Ltd Mitsui | 56,596,652 | 13 Feb, 2026 | |
| William R Berkley | Executive Chairman | 17,363,285 | 19 Aug, 2025 |
| William R Jr Berkley | President And Ceo | 4,552,770 | 19 Aug, 2025 |
| James G Shiel | Evp Investments | 797,197 | 19 Dec, 2025 |
| Lucille T Sgaglione | Evp | 241,036 | 19 Aug, 2025 |
| Richard Mark Baio | Evp & Cfo | 214,175 | 19 Aug, 2025 |
| Philip S Welt | Evp & Secretary | 200,539 | 19 Aug, 2025 |
| Ronald E Blaylock | 118,900 | 13 Jun, 2025 | |
| Christopher L Augostini | 106,769 | 13 Jun, 2025 | |
| Mark Ellwood Brockbank | 142,787 | 15 Jun, 2022 | |
| Maria Luisa Ferre | 56,144 | 13 Jun, 2025 | |
| Jonathan Talisman | 30,936 | 13 Jun, 2025 | |
| Mary C Farrell | 16,288 | 13 Jun, 2025 | |
| Leigh Ann Pusey | 44,597 | 03 Dec, 2021 | |
| Daniel Lynn Mosley | 11,795 | 13 Jun, 2025 | |
| Marie Angela Mattson | 6,577 | 13 Jun, 2025 | |
| Robert Alan Rusbuldt | 2,776 | 13 Jun, 2025 | |
| Mark L Shapiro | 3,801 | 12 Jun, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 13 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 4,314 | $70.30 | 56,596,372 | D | P |
| 13 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 280 | $71.18 | 56,596,652 | D | P |
| 13 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 15,406 | $69.73 | 56,592,058 | D | P |
| 12 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 17,599 | $71.88 | 56,574,251 | D | P |
| 12 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 2,401 | $72.76 | 56,576,652 | D | P |
| 11 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 3,578 | $70.50 | 56,545,489 | D | P |
| 11 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 11,163 | $71.45 | 56,556,652 | D | P |
| 11 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 9,289 | $69.59 | 56,541,911 | D | P |
| 10 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 12,082 | $69.92 | 56,532,622 | D | P |
| 10 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 21,884 | $69.09 | 56,520,540 | D | P |
| 09 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 4,048 | $70.32 | 56,498,656 | D | P |
| 09 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 35,952 | $69.27 | 56,494,608 | D | P |
| 06 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 4,306 | $71.39 | 56,458,656 | D | P |
| 06 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 15,694 | $70.46 | 56,454,350 | D | P |
| 05 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 6,528 | $70.79 | 56,425,184 | D | P |
| 05 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 13,472 | $71.25 | 56,438,656 | D | P |
| 04 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 22,415 | $70.25 | 56,418,656 | D | P |
| 04 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 2,585 | $69.76 | 56,396,241 | D | P |
| 03 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 31,653 | $68.87 | 56,393,656 | D | P |
| 03 Feb, 2026 | Sumitomo Insurance Co Ltd Mitsui | Common Stock | A | 8,347 | $67.75 | 56,362,003 | D | P |