W. R. Berkley Corporation insider activity
What the executives and directors of W. R. Berkley Corporation actually did with their own shares, decoded from their SEC Form 4 filings. Each figure says the stretch of time it covers.
–
net open-market flow, 12 m
94 open-market buys, 12 m
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of sale value on 10b5-1 plans, 12 m
202 days since an insider bought, whole record
Where the shares went, last 12 months
Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price.
The chart, in numbers
| Flow | Shares |
|---|---|
| Granted | 172K |
| Bought on market | 10M |
| Withheld for tax | 6,031 |
| Gifts | 1,250 |
| Kept | 10M |
Skin in the game
Directly held shares as reported after each trade, indexed to 100 at the start of the window, up to five years back. Direct holdings only: trust and family-entity positions are per-entity in the filings and do not sum honestly, so this chart refuses to guess. The steps are the trades.
The chart, in numbers
| Insider | Start of the window | Latest reported | Indexed, start = 100 |
|---|---|---|---|
| MITSUI SUMITOMO INSURANCE CO LTD | 49M | 59M | 120.4 |
| MS&AD Insurance Group Holdings, Inc. | 49M | 59M | 120.4 |
| BERKLEY WILLIAM R | 11M | 17M | 154.5 |
| BERKLEY WILLIAM R JR | 2.7M | 4.7M | 172.4 |
| SHIEL JAMES G | 638K | 811K | 127 |
Who holds what
the 14 largest holdings of 17| Insider | Role | Shares held | Buys 12 m | Sales 12 m | 12 m | Last trade |
|---|---|---|---|---|---|---|
| MITSUI SUMITOMO INSURANCE CO LTD Last trade Mar 3, 2026 | 10% owner | 59M | – | – | – | Mar 3, 2026 |
| MS&AD Insurance Group Holdings, Inc. | 10% owner | 59M | – | – | – | – |
| BERKLEY WILLIAM R Executive Chairman | Officer | 18M | – | – | – | – |
| BERKLEY WILLIAM R JR President and COO | COO | 4.9M | – | – | – | – |
| SHIEL JAMES G EVP - Investments Last trade Jun 13, 2018 | Officer | 811K | – | – | – | Jun 13, 2018 |
| Sgaglione Lucille T EVP | Officer | 242K | – | – | – | – |
| Baio Richard Mark EVP & CFO | CFO | 228K | – | – | – | – |
| Welt Philip S EVP & Secretary | Officer | 215K | – | – | – | – |
| BLAYLOCK RONALD E Last trade Apr 27, 2011 | Director | 134K | – | – | – | Apr 27, 2011 |
| Augostini Christopher L | Director | 110K | – | – | – | – |
| Ferre Maria Luisa | Director | 59K | – | – | – | – |
| Talisman Jonathan Last trade Jul 5, 2022 | Director | 34K | – | – | – | Jul 5, 2022 |
| Farrell Mary C Last trade May 21, 2009 | Director | 20K | – | – | – | May 21, 2009 |
| Mosley Daniel Lynn | Director | 15K | – | – | – | – |
Open-market trade log
the 60 most recent of 162| Date | Insider | Type | Shares | Price | Value | Since trade | Filed |
|---|---|---|---|---|---|---|---|
| Mar 3, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 39K shares filed Mar 3, 2026 | Open-market buy | 39K | – | – | – | Mar 3, 2026 |
| Mar 3, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 73K shares filed Mar 3, 2026 | Open-market buy | 73K | – | – | – | Mar 3, 2026 |
| Mar 2, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 45K shares filed Mar 3, 2026 | Open-market buy | 45K | – | – | – | Mar 3, 2026 |
| Mar 2, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 101K shares filed Mar 3, 2026 | Open-market buy | 101K | – | – | – | Mar 3, 2026 |
| Feb 27, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 147K shares filed Feb 27, 2026 | Open-market buy | 147K | – | – | – | Feb 27, 2026 |
| Feb 26, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 7,509 shares filed Feb 27, 2026 | Open-market buy | 7,509 | – | – | – | Feb 27, 2026 |
| Feb 26, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 145K shares filed Feb 27, 2026 | Open-market buy | 145K | – | – | – | Feb 27, 2026 |
| Feb 25, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 14K shares filed Feb 25, 2026 | Open-market buy | 14K | – | – | – | Feb 25, 2026 |
| Feb 25, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 155K shares filed Feb 25, 2026 | Open-market buy | 155K | – | – | – | Feb 25, 2026 |
| Feb 24, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 62K shares filed Feb 25, 2026 | Open-market buy | 62K | – | – | – | Feb 25, 2026 |
| Feb 24, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 103K shares filed Feb 25, 2026 | Open-market buy | 103K | – | – | – | Feb 25, 2026 |
| Feb 23, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 16K shares filed Feb 25, 2026 | Open-market buy | 16K | – | – | – | Feb 25, 2026 |
| Feb 23, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 204K shares filed Feb 25, 2026 | Open-market buy | 204K | – | – | – | Feb 25, 2026 |
| Feb 20, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 161K shares filed Feb 20, 2026 | Open-market buy | 161K | – | – | – | Feb 20, 2026 |
| Feb 19, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 44K shares filed Feb 20, 2026 | Open-market buy | 44K | – | – | – | Feb 20, 2026 |
| Feb 19, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 301K shares filed Feb 20, 2026 | Open-market buy | 301K | – | – | – | Feb 20, 2026 |
| Feb 18, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 45K shares filed Feb 18, 2026 | Open-market buy | 45K | – | – | – | Feb 18, 2026 |
| Feb 18, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 240K shares filed Feb 18, 2026 | Open-market buy | 240K | – | – | – | Feb 18, 2026 |
| Feb 17, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 281K shares filed Feb 18, 2026 | Open-market buy | 281K | – | – | – | Feb 18, 2026 |
| Feb 13, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 280 shares filed Feb 13, 2026 | Open-market buy | 280 | – | – | – | Feb 13, 2026 |
| Feb 13, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 4,314 shares filed Feb 13, 2026 | Open-market buy | 4,314 | – | – | – | Feb 13, 2026 |
| Feb 13, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 15K shares filed Feb 13, 2026 | Open-market buy | 15K | – | – | – | Feb 13, 2026 |
| Feb 12, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 2,401 shares filed Feb 13, 2026 | Open-market buy | 2,401 | – | – | – | Feb 13, 2026 |
| Feb 12, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 18K shares filed Feb 13, 2026 | Open-market buy | 18K | – | – | – | Feb 13, 2026 |
| Feb 11, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 3,578 shares filed Feb 11, 2026 | Open-market buy | 3,578 | – | – | – | Feb 11, 2026 |
| Feb 11, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 9,289 shares filed Feb 11, 2026 | Open-market buy | 9,289 | – | – | – | Feb 11, 2026 |
| Feb 11, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 11K shares filed Feb 11, 2026 | Open-market buy | 11K | – | – | – | Feb 11, 2026 |
| Feb 10, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 12K shares filed Feb 11, 2026 | Open-market buy | 12K | – | – | – | Feb 11, 2026 |
| Feb 10, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 22K shares filed Feb 11, 2026 | Open-market buy | 22K | – | – | – | Feb 11, 2026 |
| Feb 9, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 4,048 shares filed Feb 11, 2026 | Open-market buy | 4,048 | – | – | – | Feb 11, 2026 |
| Feb 9, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 36K shares filed Feb 11, 2026 | Open-market buy | 36K | – | – | – | Feb 11, 2026 |
| Feb 6, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 4,306 shares filed Feb 6, 2026 | Open-market buy | 4,306 | – | – | – | Feb 6, 2026 |
| Feb 6, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 16K shares filed Feb 6, 2026 | Open-market buy | 16K | – | – | – | Feb 6, 2026 |
| Feb 5, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 6,528 shares filed Feb 6, 2026 | Open-market buy | 6,528 | – | – | – | Feb 6, 2026 |
| Feb 5, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 13K shares filed Feb 6, 2026 | Open-market buy | 13K | – | – | – | Feb 6, 2026 |
| Feb 4, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 2,585 shares filed Feb 4, 2026 | Open-market buy | 2,585 | – | – | – | Feb 4, 2026 |
| Feb 4, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 22K shares filed Feb 4, 2026 | Open-market buy | 22K | – | – | – | Feb 4, 2026 |
| Feb 3, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 8,347 shares filed Feb 4, 2026 | Open-market buy | 8,347 | – | – | – | Feb 4, 2026 |
| Feb 3, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 32K shares filed Feb 4, 2026 | Open-market buy | 32K | – | – | – | Feb 4, 2026 |
| Feb 2, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 13K shares filed Feb 4, 2026 | Open-market buy | 13K | – | – | – | Feb 4, 2026 |
| Feb 2, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 237K shares filed Feb 4, 2026 | Open-market buy | 237K | – | – | – | Feb 4, 2026 |
| Jan 30, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 195K shares filed Jan 30, 2026 | Open-market buy | 195K | – | – | – | Jan 30, 2026 |
| Jan 29, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 28K shares filed Jan 30, 2026 | Open-market buy | 28K | – | – | – | Jan 30, 2026 |
| Jan 29, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 262K shares filed Jan 30, 2026 | Open-market buy | 262K | – | – | – | Jan 30, 2026 |
| Jan 28, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 29K shares filed Jan 28, 2026 | Open-market buy | 29K | – | – | – | Jan 28, 2026 |
| Jan 28, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 280K shares filed Jan 28, 2026 | Open-market buy | 280K | – | – | – | Jan 28, 2026 |
| Jan 27, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 800 shares filed Jan 28, 2026 | Open-market buy | 800 | – | – | – | Jan 28, 2026 |
| Jan 27, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 2,671 shares filed Jan 28, 2026 | Open-market buy | 2,671 | – | – | – | Jan 28, 2026 |
| Jan 27, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 8,582 shares filed Jan 28, 2026 | Open-market buy | 8,582 | – | – | – | Jan 28, 2026 |
| Jan 27, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 12K shares filed Jan 28, 2026 | Open-market buy | 12K | – | – | – | Jan 28, 2026 |
| Jan 27, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 326K shares filed Jan 28, 2026 | Open-market buy | 326K | – | – | – | Jan 28, 2026 |
| Jan 26, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 76K shares filed Jan 28, 2026 | Open-market buy | 76K | – | – | – | Jan 28, 2026 |
| Jan 26, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 294K shares filed Jan 28, 2026 | Open-market buy | 294K | – | – | – | Jan 28, 2026 |
| Jan 23, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 167K shares filed Jan 23, 2026 | Open-market buy | 167K | – | – | – | Jan 23, 2026 |
| Jan 23, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 201K shares filed Jan 23, 2026 | Open-market buy | 201K | – | – | – | Jan 23, 2026 |
| Jan 22, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 330K shares filed Jan 23, 2026 | Open-market buy | 330K | – | – | – | Jan 23, 2026 |
| Jan 21, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 59K shares filed Jan 21, 2026 | Open-market buy | 59K | – | – | – | Jan 21, 2026 |
| Jan 21, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 261K shares filed Jan 21, 2026 | Open-market buy | 261K | – | – | – | Jan 21, 2026 |
| Jan 20, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 45K shares filed Jan 21, 2026 | Open-market buy | 45K | – | – | – | Jan 21, 2026 |
| Jan 20, 2026 | MITSUI SUMITOMO INSURANCE CO LTD (10% owner) 265K shares filed Jan 21, 2026 | Open-market buy | 265K | – | – | – | Jan 21, 2026 |
“Since trade” compares with the latest insider-implied price, not a market quote: these pages are built from filings alone. A role here is the one on that day's Form 4, so somebody promoted since appears under both titles.
Filing hygiene
73 Forms 4, 3 years
1 filed late
0 amendments
1.4 avg. days to file
How to read this
A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.
Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.