As of the latest Form 4 filed Jun 4, 2026.
What W. R. Berkley Corp insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 14 most recent filings for WRB.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-04 | 2026-06-03 | BERKLEY WILLIAM R Executive Chairman | AAward | +3.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-03 | Ferre Maria Luisa Director | AAward | +3.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-03 | Mattson Marie Angela Director | AAward | +3.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-03 | BERKLEY WILLIAM R JR President and CEO | AAward | +3.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-03 | Mosley Daniel Lynn Director | AAward | +3.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-03 | Farrell Mary C Director | AAward | +3.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-03 | Rusbuldt Robert Alan Director | AAward | +3.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-03 | Augostini Christopher L Director | AAward | +3.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-03 | BLAYLOCK RONALD E Director | AAward | +3.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-04 | 2026-06-03 | Talisman Jonathan Director | AAward | +3.09K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-03 | 2026-03-03 | MITSUI SUMITOMO INSURANCE CO LTD 10% owner | PPurchase | +73.2K | $72.52 | $5.31M | Yes (planned) | Form 4 ↗ |
| 2026-03-03 | 2026-03-03 | MITSUI SUMITOMO INSURANCE CO LTD, 10% owner | PPurchase | +39.0K | $71.60 | $2.79M | Yes (planned) | Form 4 ↗ |
| 2026-03-03 | 2026-03-02 | MITSUI SUMITOMO INSURANCE CO LTD, 10% owner | PPurchase | +101K | $73.20 | $7.39M | Yes (planned) | Form 4 ↗ |
| 2026-03-03 | 2026-03-02 | MITSUI SUMITOMO INSURANCE CO LTD, 10% owner | PPurchase | +45.1K | $72.29 | $3.26M | Yes (planned) | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also WRB’s full analysis or the market-wide insider trading feed. The tabs above jump to WRB’s other SEC data.
Source: SEC Form 4 filings for WRB, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.