{
 "as_of": "2026-11-08",
 "cmr": "us-cm-kg/NYSE/WLK",
 "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# WESTLAKE CORP (NYSE: WLK) — research page\n\nAs of 2026-11-08 · us-cm-kg · record version 1\n\n## Identity and listing\n\nThe issuer is WESTLAKE CORP, listed on NYSE under ticker WLK, with ISIN US9604131022 and LEI GOXNEVUM0LL78B1OS344. Its security type is Corporate, its segment is not on the record, its sector is 2860 Industrial Organic Chemicals, and its jurisdiction is United States — Delaware. Its listing status is listed, not halted.\n\n## The disclosure read\n\nThe record holds 85 filings on 38 filing days in the window from 2025-11-08 to 2026-11-08. The median gap between filing days is 4 days, and the median latency from the latest filing to the record date is 4 days. The NYSE median cadence gap is 6.0 days and the NYSE median latency is 4.0 days across 3256 issuers, with a median of 64.0 filings. The sector median cadence gap is 7.0 days and the sector median latency is 4.0 days across 24 issuers, with a median of 41.5 filings. The latest filing is dated 2026-11-04 and is of type results.\n\n## Auditor\n\nThe auditor of record is PricewaterhouseCoopers LLP, located in Houston, Texas. The record holds no auditor changes.\n\n## Events and halts\n\nThe record holds two listing lines, both dated 2026-08-21. It holds no delisting and no name change. 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 the exchanges' tier transfers are not EDGAR filings. The halt flag reads listed, not halted.\n\n## Orderability\n\nThe outcome is not determinable, because the chapter's orderability section carries no client categories and so the outcome cannot name its client category. The rule version is acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, and the chapter is as of 2026-11-04.\n\n## Coverage\n\nThe record holds no research houses named on the issuer's investor-relations page, because none was found on the pages read.\n\n## Open research\n\nThe record holds no openly published research notes, because none was found.\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 issuer's years sealed are 2021, 2022, 2023, 2024, 2025 and 2026. The market's earliest sealed date is 2021-01-04, and the live record began on 2026-09-12.\n\n## Sources\n\n9 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://www.sec.gov/data-research/sec-markets-data/fails-deliver-data (identity.isin)\n- https://data.sec.gov/submissions/CIK0001262823.json (identity.jurisdiction)\n- https://mapping.gleif.org/api/v2/isin-lei/latest/download (identity.lei)\n- https://mcp.us-cm-kg.ai/events/NYSE/WLK (the disclosure lines)\n- https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts (the halt flag)\n- https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/wlk-20251231.htm (the auditor)\n- https://mcp.us-cm-kg.ai/book/aio.json (the orderability chapter)\n- https://mcp.us-cm-kg.ai/record/NYSE/WLK (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": {
    "read_by": "EDGAR 10-K cover page iXBRL tag (dei:AuditorName, dei:AuditorLocation, dei:AuditorFirmId, dei:DocumentPeriodEndDate)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/wlk-20251231.htm",
    "state": "sourced",
    "value": "PricewaterhouseCoopers LLP"
   },
   "auditor_firm_id": {
    "read_by": "EDGAR 10-K cover page iXBRL tag (dei:AuditorName, dei:AuditorLocation, dei:AuditorFirmId, dei:DocumentPeriodEndDate)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/wlk-20251231.htm",
    "state": "sourced",
    "value": "238"
   },
   "auditor_location": {
    "read_by": "EDGAR 10-K cover page iXBRL tag (dei:AuditorName, dei:AuditorLocation, dei:AuditorFirmId, dei:DocumentPeriodEndDate)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/wlk-20251231.htm",
    "state": "sourced",
    "value": "Houston, Texas"
   },
   "changes": []
  },
  "cmr": "us-cm-kg/NYSE/WLK",
  "coverage": {
   "count": 0,
   "houses": [],
   "pages_checked": [
    {
     "page": "https://investors.westlake.com/stock/analyst-coverage",
     "result": "not readable by this rail (403)"
    }
   ],
   "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": 24,
     "median_cadence_gap_days": 7,
     "median_filings": 41.5,
     "median_latency_days": 4,
     "name": "2860 Industrial Organic Chemicals"
    }
   },
   "by_type": {
    "agm_egm": 3,
    "corporate_news": 9,
    "director_change": 4,
    "directors_dealings": 52,
    "regulatory_filing": 9,
    "results": 8
   },
   "cadence_median_gap_days": 4,
   "filing_days": 38,
   "filings": 85,
   "latency_days": 4,
   "latest": [
    {
     "category": "10-Q",
     "date": "2026-11-04",
     "source": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000080/wlk-20260930.htm",
     "title": "10-Q — 10-Q",
     "type": "results"
    },
    {
     "category": "8-K",
     "date": "2026-11-04",
     "source": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000076/wlk-20261104.htm",
     "title": "8-K — 8-K (items 2.02,7.01,9.01)",
     "type": "results"
    },
    {
     "category": "8-K",
     "date": "2026-09-29",
     "source": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000067/wlk-20260924.htm",
     "title": "8-K — 8-K (items 2.05,7.01)",
     "type": "corporate_news"
    },
    {
     "category": "4",
     "date": "2026-09-01",
     "source": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526377500/xslF345X06/ownership.xml",
     "title": "4 — 4",
     "type": "directors_dealings"
    },
    {
     "category": "3",
     "date": "2026-08-31",
     "source": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526377110/xslF345X06/ownership.xml",
     "title": "3 — 3",
     "type": "directors_dealings"
    }
   ],
   "latest_filing_date": "2026-11-04",
   "read": "the node's event lines (list_events_since), as get_filings serves them",
   "source": "https://mcp.us-cm-kg.ai/events/NYSE/WLK",
   "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": {
    "read_by": "SEC Fails-to-Deliver data (CUSIP for the symbol) · ISIN = US + CUSIP + ISO 6166 check digit",
    "read_date": "2026-10-02",
    "read_date_basis": "last_seen",
    "source": "https://www.sec.gov/data-research/sec-markets-data/fails-deliver-data",
    "state": "sourced",
    "value": "US9604131022"
   },
   "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/CIK0001262823.json",
    "state": "sourced",
    "value": "United States — Delaware"
   },
   "lei": {
    "read_by": "GLEIF ISIN-to-LEI mapping file (daily), LEI by exact ISIN",
    "read_date": "2026-11-08",
    "read_date_basis": "the field",
    "source": "https://mapping.gleif.org/api/v2/isin-lei/latest/download (ISIN US9604131022)",
    "state": "sourced",
    "value": "GOXNEVUM0LL78B1OS344"
   },
   "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/CIK0001262823.json",
    "state": "sourced",
    "value": "WESTLAKE 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/CIK0001262823.json",
    "state": "sourced",
    "value": "2860 Industrial Organic Chemicals"
   },
   "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/CIK0001262823.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": "WLK"
   },
   "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": [
    {
     "date": "2026-08-21",
     "source": "https://www.sec.gov/Archives/edgar/data/1262823/000087688226000021/WLK082126.pdf",
     "title": "CERT — NYSE TEXAS CERTIFICATION"
    },
    {
     "date": "2026-08-21",
     "source": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000060/wlk-form8anysetexasduallis.htm",
     "title": "8-A12B — 8-A12B"
    }
   ],
   "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": "sha256:43c8bb4855f4adf9db7be6965accb7c67cab0394c983e6f552d796a86d90b3d6",
  "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/WLK",
   "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": "sha256:43c8bb4855f4adf9db7be6965accb7c67cab0394c983e6f552d796a86d90b3d6",
 "path": "/us/NYSE/WLK",
 "schema": "research-page v0.1 (USR-02, 2026-11-11)",
 "sections": [
  {
   "id": "identity",
   "text": "The issuer is WESTLAKE CORP, listed on NYSE under ticker WLK, with ISIN US9604131022 and LEI GOXNEVUM0LL78B1OS344. Its security type is Corporate, its segment is not on the record, its sector is 2860 Industrial Organic Chemicals, and its jurisdiction is United States — Delaware. Its listing status is listed, not halted.",
   "title": "Identity and listing"
  },
  {
   "id": "disclosure",
   "text": "The record holds 85 filings on 38 filing days in the window from 2025-11-08 to 2026-11-08. The median gap between filing days is 4 days, and the median latency from the latest filing to the record date is 4 days. The NYSE median cadence gap is 6.0 days and the NYSE median latency is 4.0 days across 3256 issuers, with a median of 64.0 filings. The sector median cadence gap is 7.0 days and the sector median latency is 4.0 days across 24 issuers, with a median of 41.5 filings. The latest filing is dated 2026-11-04 and is of type results.",
   "title": "The disclosure read"
  },
  {
   "id": "auditor",
   "text": "The auditor of record is PricewaterhouseCoopers LLP, located in Houston, Texas. The record holds no auditor changes.",
   "title": "Auditor"
  },
  {
   "id": "events",
   "text": "The record holds two listing lines, both dated 2026-08-21. It holds no delisting and no name change. 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 the exchanges' tier transfers are not EDGAR filings. The halt flag reads listed, not halted.",
   "title": "Events and halts"
  },
  {
   "id": "orderability",
   "text": "The outcome is not determinable, because the chapter's orderability section carries no client categories and so the outcome cannot name its client category. The rule version is acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, and the chapter is as of 2026-11-04.",
   "title": "Orderability"
  },
  {
   "id": "coverage",
   "text": "The record holds no research houses named on the issuer's investor-relations page, because none was found on the pages read.",
   "title": "Coverage"
  },
  {
   "id": "open_research",
   "text": "The record holds no openly published research notes, because none was found.",
   "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 issuer's years sealed are 2021, 2022, 2023, 2024, 2025 and 2026. The market's earliest sealed date is 2021-01-04, and the live record began on 2026-09-12.",
   "title": "As-of depth"
  },
  {
   "id": "sources",
   "text": "9 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.isin",
   "source": "https://www.sec.gov/data-research/sec-markets-data/fails-deliver-data"
  },
  {
   "for": "identity.jurisdiction",
   "source": "https://data.sec.gov/submissions/CIK0001262823.json"
  },
  {
   "for": "identity.lei",
   "source": "https://mapping.gleif.org/api/v2/isin-lei/latest/download"
  },
  {
   "for": "the disclosure lines",
   "source": "https://mcp.us-cm-kg.ai/events/NYSE/WLK"
  },
  {
   "for": "the halt flag",
   "source": "https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts"
  },
  {
   "for": "the auditor",
   "source": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/wlk-20251231.htm"
  },
  {
   "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/WLK"
  }
 ],
 "title": "WESTLAKE CORP (WLK) — research page",
 "writer": {
  "by": "Claude through the platform account, Haiku class; one pass; checked against the numbers",
  "engine": "claude-haiku-5-5"
 }
}