Home

WILLIAM R JR BERKLEY

CIK 1236253 · Chairman, President and CEO · last filed 2026-08-05

WILLIAM R JR BERKLEY is a Chairman, President and CEO who has filed 46 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing, for WRB, was dated Aug 5, 2026. Current disclosed insider exposure totals $577.4M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

Loading insider history…
Disclosed Exposure

$577.40M

Companies

3

Total Filings

46

Lifetime Open-Market Net

$0

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
WRB Chairman, President and CEO 8,203,800 $70.09 $575.00M $0 44 2026-08-05
BERKLEY W R CORP (BER) Delisted Executive Vice President 164,098 — — $0 1 2007-05-09
STRD Director 35,066 $68.18 $2.39M $0 1 2007-01-03

Recent Filings

46 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-08-05 WRB Mixed +94,454 -$299.2K EDGAR
2026-06-04 WRB Grant (A) +3,090 $0 EDGAR
2025-08-19 WRB Mixed +107,173 -$334.5K EDGAR
2025-06-13 WRB Grant (A) +2,776 $0 EDGAR
2024-08-19 WRB Mixed +115,375 -$291.9K EDGAR
2024-06-12 WRB Grant (A) +2,534 $0 EDGAR
2023-08-17 WRB Mixed +85,749 -$237.3K EDGAR
2023-06-14 WRB Grant (A) +3,479 $0 EDGAR
2022-08-17 WRB Mixed +95,202 -$274.4K EDGAR
2022-06-15 WRB Grant (A) +2,995 $0 EDGAR
Showing 1–10 of 46
Page 1 of 5
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.