WRB insider buying and SEC filings, explained
Berkley W R Corp. · CIK 11544
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Mar 2–3, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 258,176 shares between Mar 2 and Mar 3 at about $72.61 ($18.7M), reported as a purchase (code P). Holdings up <1% to 58,780,450 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Mar 3, 2026 |
| Feb 26–27, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 300,000 shares between Feb 26 and Feb 27 at about $71.65 ($21.5M), reported as a purchase (code P). Holdings up 1% to 58,522,274 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Feb 27, 2026 |
| Feb 23–25, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 553,654 shares between Feb 23 and Feb 25 at about $71.13 ($39.4M), reported as a purchase (code P). Holdings up 1% to 58,222,274 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Feb 25, 2026 |
| Feb 19–20, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 505,582 shares between Feb 19 and Feb 20 at about $70.70 ($35.7M), reported as a purchase (code P). Holdings up 1% to 57,668,620 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Feb 20, 2026 |
| Feb 17–18, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 566,386 shares between Feb 17 and Feb 18 at about $70.91 ($40.2M), reported as a purchase (code P). Holdings up 1% to 57,163,038 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Feb 18, 2026 |
| Feb 12–13, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 40,000 shares between Feb 12 and Feb 13 at about $70.93 ($2.8M), reported as a purchase (code P). Holdings up <1% to 56,596,652 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Feb 13, 2026 |
| Feb 9–11, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 97,996 shares between Feb 9 and Feb 11 at about $69.68 ($6.8M), reported as a purchase (code P). Holdings up <1% to 56,556,652 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Feb 11, 2026 |
| Feb 5–6, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 40,000 shares between Feb 5 and Feb 6 at about $70.88 ($2.8M), reported as a purchase (code P). Holdings up <1% to 56,458,656 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Feb 6, 2026 |
| Feb 2–4, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 315,221 shares between Feb 2 and Feb 4 at about $68.05 ($21.5M), reported as a purchase (code P). Holdings up 1% to 56,418,656 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Feb 4, 2026 |
| Jan 29–30, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 485,000 shares between Jan 29 and Jan 30 at about $68.22 ($33.1M), reported as a purchase (code P). Holdings up 1% to 56,103,435 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Jan 30, 2026 |
| Jan 26–28, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 1,028,931 shares between Jan 26 and Jan 28 at about $67.35 ($69.3M), reported as a purchase (code P). Holdings up 2% to 55,618,435 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Jan 28, 2026 |
| Jan 22–23, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 698,000 shares between Jan 22 and Jan 23 at about $67.19 ($46.9M), reported as a purchase (code P). Holdings up 1% to 54,589,504 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Jan 23, 2026 |
| Jan 20–21, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 630,000 shares between Jan 20 and Jan 21 at about $67.64 ($42.6M), reported as a purchase (code P). Holdings up 1% to 53,891,504 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Jan 21, 2026 |
| Jan 15–16, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 535,000 shares between Jan 15 and Jan 16 at about $68.50 ($36.6M), reported as a purchase (code P). Holdings up 1% to 53,261,504 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Jan 16, 2026 |
| Jan 12–14, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 811,041 shares between Jan 12 and Jan 14 at about $68.58 ($55.6M), reported as a purchase (code P). Holdings up 2% to 52,726,504 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Jan 14, 2026 |
| Jan 8–9, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 470,000 shares between Jan 8 and Jan 9 at about $69.45 ($32.6M), reported as a purchase (code P). Holdings up 1% to 51,915,463 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Jan 9, 2026 |
| Jan 5–7, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 681,218 shares between Jan 5 and Jan 7 at about $69.61 ($47.4M), reported as a purchase (code P). Holdings up 1% to 51,445,463 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Jan 7, 2026 |
| Dec 30, 2025–Jan 2, 2026 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 672,734 shares between Dec 30, 2025 and Jan 2 at about $70.12 ($47.2M), reported as a purchase (code P). Holdings up 1% to 50,764,245 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Jan 2, 2026 |
| Dec 23–29, 2025 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 879,573 shares between Dec 23, 2025 and Dec 29, 2025 at about $70.53 ($62.0M), reported as a purchase (code P). Holdings up 2% to 50,091,511 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Dec 29, 2025 |
| Dec 18–22, 2025 | Purchase (code P) | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) bought 610,350 shares between Dec 18, 2025 and Dec 22, 2025 at about $69.71 ($42.5M), reported as a purchase (code P). Holdings up 1% to 49,211,938 shares. Filed jointly with 1 other reporting owner. | SEC filing Filed Dec 22, 2025 |
15 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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