{"cik":"0000011544","ticker":"WRB","name":"BERKLEY W R CORP","sic_code":"6331","sic_description":"Fire, Marine & Casualty Insurance","exchange":"NYSE","state_of_incorporation":"DE","fiscal_year_end":"1231","first_filing_date":"2026-05-08","last_filing_date":"2026-07-21","url":"/sec/cik-0000011544","insider_summary":{"total_transactions":10,"unique_insiders":10,"latest_transaction":"2026-06-03"},"recent_filings":[{"accession_number":"0001628280-26-060471","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-09-03","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-09-03","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-060471","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-060471-index.html"},{"accession_number":"0000899140-26-000967","form_type":"N-PX","form_type_family":"other","doc_date":"2026-08-26","title":"N-PX — BERKLEY W R CORP — 2026-08-26","url_slug":"/sec/cik-0000011544/n-px/0000899140-26-000967","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0000899140-26-000967-index.html"},{"accession_number":"0000899140-26-000955","form_type":"13F-HR/A","form_type_family":"holdings","doc_date":"2026-08-24","title":"13F-HR/A — BERKLEY W R CORP — 2026-08-24","url_slug":"/sec/cik-0000011544/13f-hr-a/0000899140-26-000955","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0000899140-26-000955-index.html"},{"accession_number":"0000899140-26-000887","form_type":"13F-HR","form_type_family":"holdings","doc_date":"2026-08-14","title":"13F-HR — BERKLEY W R CORP — 2026-08-14","url_slug":"/sec/cik-0000011544/13f-hr/0000899140-26-000887","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0000899140-26-000887-index.html"},{"accession_number":"0001628280-26-054465","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g/0001628280-26-054465","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054465-index.html"},{"accession_number":"0001628280-26-054447","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g/0001628280-26-054447","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054447-index.html"},{"accession_number":"0001628280-26-054442","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g/0001628280-26-054442","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054442-index.html"},{"accession_number":"0001628280-26-054435","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g/0001628280-26-054435","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054435-index.html"},{"accession_number":"0001628280-26-053957","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g/0001628280-26-053957","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-053957-index.html"},{"accession_number":"0001628280-26-053952","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g/0001628280-26-053952","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-053952-index.html"},{"accession_number":"0001628280-26-053925","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g/0001628280-26-053925","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-053925-index.html"},{"accession_number":"0001628280-26-054487","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-054487","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054487-index.html"},{"accession_number":"0001628280-26-054473","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-054473","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054473-index.html"},{"accession_number":"0001628280-26-054461","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-054461","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054461-index.html"},{"accession_number":"0001628280-26-054433","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-054433","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054433-index.html"},{"accession_number":"0001628280-26-054429","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-054429","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054429-index.html"},{"accession_number":"0001628280-26-054417","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-054417","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054417-index.html"},{"accession_number":"0001628280-26-054411","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-054411","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054411-index.html"},{"accession_number":"0001628280-26-054406","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-054406","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054406-index.html"},{"accession_number":"0001628280-26-054391","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-054391","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-054391-index.html"},{"accession_number":"0001628280-26-053955","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-053955","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-053955-index.html"},{"accession_number":"0001628280-26-053948","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-053948","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-053948-index.html"},{"accession_number":"0001628280-26-053945","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-053945","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-053945-index.html"},{"accession_number":"0001628280-26-053944","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-053944","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-053944-index.html"},{"accession_number":"0001628280-26-053938","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-06","title":"SCHEDULE 13G/A — BERKLEY W R CORP — 2026-08-06","url_slug":"/sec/cik-0000011544/schedule-13g-a/0001628280-26-053938","edgar_url":"https://www.sec.gov/Archives/edgar/data/11544/0001628280-26-053938-index.html"}],"related_endpoints":{"profile":"/sec/WRB/profile","timeline":"/sec/WRB/timeline","peers":"/sec/WRB/peers","insider_pulse":"/sec/WRB/insider-pulse","insider_summary":"/sec/WRB/insider-summary","insider_transactions":"/sec/WRB/insider-transactions","form144":"/sec/WRB/form144","holdings_as_filer":"/sec/WRB/holdings","financial_facts":"/sec/WRB/financial-facts","derivatives":"/sec/WRB/derivatives","officers":"/sec/WRB/officers","insider_network":"/sec/WRB/insider-network","risk_flags":"/sec/WRB/risk-flags","filings":"/sec/WRB/filings","cross_topic_dossier":"/api/v1/dossier?ticker=WRB"}}