{
 "as_of": "2026-11-08",
 "cmr": "us-cm-kg/NYSE/WRB-PF",
 "fence": "The page is the record's research on the issuer — no analyst, no rating, no view.",
 "markdown": "The page is the record's research on the issuer — no analyst, no rating, no view.\n\n# BERKLEY W R CORP (NYSE: WRB-PF) — research page\n\nAs of 2026-11-08 · us-cm-kg · record version 1\n\n## Identity and listing\n\nThe issuer is BERKLEY W R CORP, listed on the NYSE under ticker WRB-PF. The ISIN is not on the record and the LEI is not on the record. Its security type is Corporate, its segment is not on the record, its sector is 6331 Fire, Marine & Casualty Insurance, and its jurisdiction is United States, Delaware. The issuer is listed and not halted.\n\n## The disclosure read\n\nThe record holds 174 filings in the twelve months to 2026-11-08, across 55 filing days. The median gap between filing days is 4.0 days. The latest filing is dated 2026-11-02, six days before the record date, and its type is prospectus. The NYSE median cadence gap is 6.0 days across 3,256 issuers, and the NYSE median latency is 4.0 days. The sector median cadence gap is 5.0 days across 85 issuers, and the sector median latency is 3 days. The issuer's count of 174 filings is above the NYSE median of 64.0 and above the sector median of 80. By type, the record holds 121 regulatory filings, 37 directors' dealings, 8 results, 3 AGM/EGM, 3 corporate news, 1 director change and 1 prospectus.\n\n## Auditor\n\nThe auditor of record is not on the record, and the auditor's location is not on the record, because the latest annual report cover carries no dei:AuditorName tag. The record holds no auditor changes.\n\n## Events and halts\n\nThe record holds no listing, delisting or name change lines. The domicile change is not on the record, because EDGAR states no dated change of state of incorporation on a filing line. The segment move is not on the record, because exchange tier transfers are not EDGAR filings. The issuer is listed and not halted.\n\n## Orderability\n\nThe outcome is not determinable under rule version acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, as of 2026-11-04. The chapter's orderability section carries no client categories, so the outcome cannot name its client category.\n\n## Coverage\n\nNo research houses were found on the issuer's investor-relations pages read.\n\n## Open research\n\nNo openly published research notes were found on the record.\n\n## Licensed\n\nLicensed research: none loaded. A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded.\n\n## As-of depth\n\nThe sealed years that hold the issuer are 2021, 2022, 2023, 2024, 2025 and 2026. The market's earliest sealed date is 2021-01-04. The live record began on 2026-09-12.\n\n## Sources\n\n6 source pages are named on this page; every value above carries its own source page and read date in the numbers.\n\n- https://www.sec.gov/files/company_tickers_exchange.json (identity.exchange)\n- https://data.sec.gov/submissions/CIK0000011544.json (identity.jurisdiction)\n- https://mcp.us-cm-kg.ai/events/NYSE/WRB-PF (the disclosure lines)\n- https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts (the halt flag)\n- https://mcp.us-cm-kg.ai/book/aio.json (the orderability chapter)\n- https://mcp.us-cm-kg.ai/record/NYSE/WRB-PF (the record)\n",
 "market": "US",
 "node": "us-cm-kg",
 "numbers": {
  "as_of_depth": {
   "issuer_years_sealed": [
    "2021",
    "2022",
    "2023",
    "2024",
    "2025",
    "2026"
   ],
   "live_record_began": "2026-09-12",
   "node_history_from": "2021-01-04",
   "node_years_sealed": [
    "2021",
    "2022",
    "2023",
    "2024",
    "2025",
    "2026"
   ],
   "record_version": 1,
   "sealed": true
  },
  "auditor": {
   "auditor": {
    "market": "US",
    "reason": "no dei:AuditorName tag on the latest annual report cover (foreign private issuers and older filings carry none)",
    "state": "not_on_record"
   },
   "auditor_firm_id": {
    "market": "US",
    "state": "not_on_record"
   },
   "auditor_location": {
    "market": "US",
    "state": "not_on_record"
   },
   "changes": []
  },
  "cmr": "us-cm-kg/NYSE/WRB-PF",
  "coverage": {
   "count": 0,
   "houses": [],
   "pages_checked": [],
   "read_by": "Perplexity sonar (search) · page read by this rail",
   "read_date": "2026-11-11",
   "since": null,
   "state": "none_found"
  },
  "disclosure": {
   "against": {
    "exchange": {
     "issuers": 3256,
     "median_cadence_gap_days": 6,
     "median_filings": 64,
     "median_latency_days": 4,
     "name": "NYSE"
    },
    "sector": {
     "issuers": 85,
     "median_cadence_gap_days": 5,
     "median_filings": 80,
     "median_latency_days": 3,
     "name": "6331 Fire, Marine & Casualty Insurance"
    }
   },
   "by_type": {
    "agm_egm": 3,
    "corporate_news": 3,
    "director_change": 1,
    "directors_dealings": 37,
    "prospectus": 1,
    "regulatory_filing": 121,
    "results": 8
   },
   "cadence_median_gap_days": 4,
   "filing_days": 55,
   "filings": 174,
   "latency_days": 6,
   "latest": [
    {
     "category": "S-3ASR",
     "date": "2026-11-02",
     "source": "https://www.sec.gov/Archives/edgar/data/11544/000119312526443869/d119733ds3asr.htm",
     "title": "S-3ASR — S-3ASR",
     "type": "prospectus"
    },
    {
     "category": "10-Q",
     "date": "2026-11-02",
     "source": "https://www.sec.gov/Archives/edgar/data/11544/000001154426000048/wrb-20260930.htm",
     "title": "10-Q — 10-Q",
     "type": "results"
    },
    {
     "category": "SCHEDULE 13G/A",
     "date": "2026-10-30",
     "source": "https://www.sec.gov/Archives/edgar/data/11544/000210011926001695/xslSCHEDULE_13G_X02/primary_doc.xml",
     "title": "SCHEDULE 13G/A",
     "type": "regulatory_filing"
    },
    {
     "category": "SCHEDULE 13G/A",
     "date": "2026-10-27",
     "source": "https://www.sec.gov/Archives/edgar/data/11544/000201238326003878/xslSCHEDULE_13G_X02/primary_doc.xml",
     "title": "SCHEDULE 13G/A",
     "type": "regulatory_filing"
    },
    {
     "category": "8-K",
     "date": "2026-10-19",
     "source": "https://www.sec.gov/Archives/edgar/data/11544/000001154426000046/wrb-20261019.htm",
     "title": "8-K — 8-K (items 2.02,9.01)",
     "type": "results"
    }
   ],
   "latest_filing_date": "2026-11-02",
   "read": "the node's event lines (list_events_since), as get_filings serves them",
   "source": "https://mcp.us-cm-kg.ai/events/NYSE/WRB-PF",
   "window": {
    "from": "2025-11-08",
    "to": "2026-11-08"
   }
  },
  "identity": {
   "exchange": {
    "read_by": "EDGAR company_tickers_exchange.json (SEC list of exchange-listed filers)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/files/company_tickers_exchange.json",
    "state": "sourced",
    "value": "NYSE"
   },
   "isin": {
    "market": "US",
    "reason": "no LEI, so no GLEIF ISIN route; EDGAR carries no ISIN",
    "state": "not_on_record"
   },
   "jurisdiction": {
    "read_by": "EDGAR submissions API (issuer header as filed) (stateOfIncorporation)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://data.sec.gov/submissions/CIK0000011544.json",
    "state": "sourced",
    "value": "United States — Delaware"
   },
   "lei": {
    "market": "US",
    "reason": "no GLEIF record with the exact legal name in jurisdiction US-DE",
    "state": "not_on_record"
   },
   "name": {
    "read_by": "EDGAR submissions API (issuer header as filed)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://data.sec.gov/submissions/CIK0000011544.json",
    "state": "sourced",
    "value": "BERKLEY W R CORP"
   },
   "sector": {
    "read_by": "EDGAR submissions API (issuer header as filed) (SIC code as assigned by the SEC)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://data.sec.gov/submissions/CIK0000011544.json",
    "state": "sourced",
    "value": "6331 Fire, Marine & Casualty Insurance"
   },
   "security_type": {
    "read_by": "EDGAR submissions API (issuer header as filed)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://data.sec.gov/submissions/CIK0000011544.json",
    "state": "sourced",
    "value": "Corporate"
   },
   "segment": {
    "market": "US",
    "state": "not_on_record"
   },
   "ticker": {
    "read_by": "EDGAR company_tickers_exchange.json (SEC list of exchange-listed filers)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/files/company_tickers_exchange.json",
    "state": "sourced",
    "value": "WRB-PF"
   },
   "website": {
    "market": "US",
    "state": "not_on_record"
   }
  },
  "licensed": {
   "columns": [
    "licensor",
    "entitlement",
    "title",
    "date",
    "source"
   ],
   "rows": [],
   "rule": "A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded."
  },
  "lifecycle": {
   "delisting": [],
   "domicile_change": {
    "market": "US",
    "reason": "EDGAR states no dated change of state of incorporation on a filing line",
    "state": "not_on_record"
   },
   "listing": [],
   "name_change": [],
   "segment_move": {
    "market": "US",
    "reason": "the exchanges' tier transfers are not EDGAR filings",
    "state": "not_on_record"
   }
  },
  "market": "US",
  "node": "us-cm-kg",
  "numbers_hash": "sha256:661646d774073dfe75ef230927cc04ff2ce737258a42a48e3c3f35c83ec241f3",
  "open_research": {
   "read_date": "2026-11-11",
   "rows": [],
   "state": "none_found"
  },
  "orderability": {
   "chapter_as_of": "2026-11-04",
   "client_categories": [],
   "determinable": false,
   "read": {
    "chapter": "https://mcp.us-cm-kg.ai/book/aio.json",
    "door": "https://mcp.us-cm-kg.ai/mcp",
    "tool": "get_orderability"
   },
   "reason": "the chapter's orderability section carries no client_categories: the outcome cannot name its client category",
   "rule_version": "acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1",
   "section": "us.aio.v8"
  },
  "record": {
   "as_of": "2026-11-08",
   "url": "https://mcp.us-cm-kg.ai/record/NYSE/WRB-PF",
   "version": 1
  },
  "schema": "research-numbers v0.1 (USR-01, 2026-11-11)",
  "status": {
   "read_date": "2026-11-08",
   "source": "https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts",
   "value": "listed, not halted"
  }
 },
 "numbers_hash": "sha256:661646d774073dfe75ef230927cc04ff2ce737258a42a48e3c3f35c83ec241f3",
 "path": "/us/NYSE/WRB-PF",
 "schema": "research-page v0.1 (USR-02, 2026-11-11)",
 "sections": [
  {
   "id": "identity",
   "text": "The issuer is BERKLEY W R CORP, listed on the NYSE under ticker WRB-PF. The ISIN is not on the record and the LEI is not on the record. Its security type is Corporate, its segment is not on the record, its sector is 6331 Fire, Marine & Casualty Insurance, and its jurisdiction is United States, Delaware. The issuer is listed and not halted.",
   "title": "Identity and listing"
  },
  {
   "id": "disclosure",
   "text": "The record holds 174 filings in the twelve months to 2026-11-08, across 55 filing days. The median gap between filing days is 4.0 days. The latest filing is dated 2026-11-02, six days before the record date, and its type is prospectus. The NYSE median cadence gap is 6.0 days across 3,256 issuers, and the NYSE median latency is 4.0 days. The sector median cadence gap is 5.0 days across 85 issuers, and the sector median latency is 3 days. The issuer's count of 174 filings is above the NYSE median of 64.0 and above the sector median of 80. By type, the record holds 121 regulatory filings, 37 directors' dealings, 8 results, 3 AGM/EGM, 3 corporate news, 1 director change and 1 prospectus.",
   "title": "The disclosure read"
  },
  {
   "id": "auditor",
   "text": "The auditor of record is not on the record, and the auditor's location is not on the record, because the latest annual report cover carries no dei:AuditorName tag. The record holds no auditor changes.",
   "title": "Auditor"
  },
  {
   "id": "events",
   "text": "The record holds no listing, delisting or name change lines. The domicile change is not on the record, because EDGAR states no dated change of state of incorporation on a filing line. The segment move is not on the record, because exchange tier transfers are not EDGAR filings. The issuer is listed and not halted.",
   "title": "Events and halts"
  },
  {
   "id": "orderability",
   "text": "The outcome is not determinable under rule version acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, as of 2026-11-04. The chapter's orderability section carries no client categories, so the outcome cannot name its client category.",
   "title": "Orderability"
  },
  {
   "id": "coverage",
   "text": "No research houses were found on the issuer's investor-relations pages read.",
   "title": "Coverage"
  },
  {
   "id": "open_research",
   "text": "No openly published research notes were found on the record.",
   "title": "Open research"
  },
  {
   "id": "licensed",
   "text": "Licensed research: none loaded. A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded.",
   "title": "Licensed"
  },
  {
   "id": "depth",
   "text": "The sealed years that hold the issuer are 2021, 2022, 2023, 2024, 2025 and 2026. The market's earliest sealed date is 2021-01-04. The live record began on 2026-09-12.",
   "title": "As-of depth"
  },
  {
   "id": "sources",
   "text": "6 source pages are named on this page; every value above carries its own source page and read date in the numbers.",
   "title": "Sources"
  }
 ],
 "sources": [
  {
   "for": "identity.exchange",
   "source": "https://www.sec.gov/files/company_tickers_exchange.json"
  },
  {
   "for": "identity.jurisdiction",
   "source": "https://data.sec.gov/submissions/CIK0000011544.json"
  },
  {
   "for": "the disclosure lines",
   "source": "https://mcp.us-cm-kg.ai/events/NYSE/WRB-PF"
  },
  {
   "for": "the halt flag",
   "source": "https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts"
  },
  {
   "for": "the orderability chapter",
   "source": "https://mcp.us-cm-kg.ai/book/aio.json"
  },
  {
   "for": "the record",
   "source": "https://mcp.us-cm-kg.ai/record/NYSE/WRB-PF"
  }
 ],
 "title": "BERKLEY W R CORP (WRB-PF) — research page",
 "writer": {
  "by": "Claude through the platform account, Haiku class; one pass; checked against the numbers",
  "engine": "claude-haiku-5-5"
 }
}