{
  "name": "Westlake Corp",
  "legal_name": "WESTLAKE CORP",
  "ticker": "WLK",
  "tickers": [
    "WLK"
  ],
  "cik": "0001262823",
  "page_url": "https://steadybase.io/company/westlake-corp/",
  "markdown_url": "https://steadybase.io/company/westlake-corp.md",
  "json_url": "https://steadybase.io/company/westlake-corp.json",
  "as_of": "2026-11-10",
  "last_filed": "2026-11-04",
  "industry": {
    "sic": "2860",
    "description": "Industrial Organic Chemicals"
  },
  "headquarters": {
    "city": "Houston",
    "state": "TX",
    "country": "US"
  },
  "exchanges": [
    "NYSE"
  ],
  "fiscal_year_end": "December 31",
  "filer_category": "Large accelerated filer",
  "state_of_incorporation": "DE",
  "website": "westlake.com",
  "investor_relations_url": "https://westlake.com/#",
  "linkedin_company_url": "https://www.linkedin.com/company/westlake-corporation",
  "summary": {
    "text": "Westlake Corporation is a vertically integrated global manufacturer and marketer of both housing and infrastructure products and performance and essential materials that are designed to enhance the lives of people every day. Our products include some of the most widely used materials in the world, which are fundamental to many diverse consumer and industrial markets, including residential construction, flexible and rigid packaging, automotive, healthcare, water treatment, wind turbines, coatings as well as other durable and non-durable goods.",
    "section": "Item 1. Business",
    "period_end": "2025-12-31",
    "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/wlk-20251231.htm"
  },
  "key_facts": [
    {
      "key": "revenue",
      "label": "Revenue",
      "value": 11170000000,
      "unit": "USD",
      "period_start": "2025-01-01",
      "period_end": "2025-12-31",
      "basis": "filing_fact",
      "form": "10-K",
      "filed": "2026-02-26",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/0001262823-26-000016-index.html",
      "text": "Revenue: $11.2B for the fiscal year ended Dec 31, 2025 (10-K filed Feb 26, 2026)."
    },
    {
      "key": "operating_income",
      "label": "Operating income",
      "value": -1578000000,
      "unit": "USD",
      "period_start": "2025-01-01",
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      "form": "10-K",
      "filed": "2026-02-26",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/0001262823-26-000016-index.html",
      "text": "Operating income: -$1.6B for the fiscal year ended Dec 31, 2025 (10-K filed Feb 26, 2026)."
    },
    {
      "key": "net_income",
      "label": "Net income",
      "value": -1508000000,
      "unit": "USD",
      "period_start": "2025-01-01",
      "period_end": "2025-12-31",
      "basis": "filing_fact",
      "form": "10-K",
      "filed": "2026-02-26",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/0001262823-26-000016-index.html",
      "text": "Net income: -$1.5B for the fiscal year ended Dec 31, 2025 (10-K filed Feb 26, 2026)."
    },
    {
      "key": "sga",
      "label": "SG&A",
      "value": 900000000,
      "unit": "USD",
      "period_start": "2025-01-01",
      "period_end": "2025-12-31",
      "basis": "filing_fact",
      "form": "10-K",
      "filed": "2026-02-26",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/0001262823-26-000016-index.html",
      "text": "SG&A: $900.0M for the fiscal year ended Dec 31, 2025 (10-K filed Feb 26, 2026)."
    },
    {
      "key": "employees",
      "label": "Employees",
      "value": 14600,
      "unit": "people",
      "period_end": "2025-12-31",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/0001262823-26-000016-index.html",
      "text": "Employees: 14,600 as of Dec 31, 2025, as reported in an SEC filing."
    },
    {
      "key": "shares_outstanding",
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      "value": 127886945,
      "unit": "shares",
      "period_end": "2026-10-28",
      "form": "10-Q",
      "filed": "2026-11-04",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000080/0001262823-26-000080-index.html",
      "text": "Shares outstanding: 127,886,945 as of Oct 28, 2026 (10-Q filed Nov 4, 2026)."
    },
    {
      "key": "auditor",
      "label": "Auditor",
      "value": "Pricewaterhousecoopers LLP",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/wlk-20251231.htm",
      "text": "Auditor: Pricewaterhousecoopers LLP, Houston, Texas, named in the latest 10-K."
    }
  ],
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      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526376996/d437911d8k.htm"
    },
    {
      "filed": "2026-08-04",
      "items": [
        {
          "item": "2.02",
          "label": "Results of operations and financial condition (earnings release)",
          "signal": "earnings"
        },
        {
          "item": "7.01",
          "label": "Regulation FD disclosure",
          "signal": "disclosure"
        },
        {
          "item": "9.01",
          "label": "Financial statements and exhibits",
          "signal": "exhibits"
        }
      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000026/wlk-20260804.htm"
    },
    {
      "filed": "2026-07-29",
      "items": [
        {
          "item": "8.01",
          "label": "Other events",
          "signal": "other"
        }
      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526324110/d151580d8k.htm"
    },
    {
      "filed": "2026-06-15",
      "items": [
        {
          "item": "7.01",
          "label": "Regulation FD disclosure",
          "signal": "disclosure"
        },
        {
          "item": "9.01",
          "label": "Financial statements and exhibits",
          "signal": "exhibits"
        }
      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526271206/d166027d8k.htm"
    },
    {
      "filed": "2026-05-18",
      "items": [
        {
          "item": "5.07",
          "label": "Submission of matters to a vote of security holders",
          "signal": "governance"
        }
      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526229093/d918757d8k.htm"
    },
    {
      "filed": "2026-05-05",
      "items": [
        {
          "item": "2.02",
          "label": "Results of operations and financial condition (earnings release)",
          "signal": "earnings"
        },
        {
          "item": "7.01",
          "label": "Regulation FD disclosure",
          "signal": "disclosure"
        },
        {
          "item": "9.01",
          "label": "Financial statements and exhibits",
          "signal": "exhibits"
        }
      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000019/wlk-20260505.htm"
    },
    {
      "filed": "2026-05-01",
      "items": [
        {
          "item": "7.01",
          "label": "Regulation FD disclosure",
          "signal": "disclosure"
        }
      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526199067/d145614d8k.htm"
    },
    {
      "filed": "2026-04-20",
      "items": [
        {
          "item": "5.02",
          "label": "Departure or appointment of directors or officers; compensation",
          "signal": "leadership_change"
        },
        {
          "item": "7.01",
          "label": "Regulation FD disclosure",
          "signal": "disclosure"
        },
        {
          "item": "9.01",
          "label": "Financial statements and exhibits",
          "signal": "exhibits"
        }
      ],
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526164225/d28569d8k.htm"
    }
  ],
  "insider_trades": [
    {
      "owner": "Albert Chao",
      "role": "Executive Chairman",
      "action": "sold",
      "code": "S",
      "shares": 38873,
      "value_usd": 3120775,
      "date": "2026-08-11",
      "filed": "2026-08-11",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526345140/0001193125-26-345140-index.htm"
    },
    {
      "owner": "Robert F. Buesinger",
      "role": "EVP, PEM Segment Head",
      "action": "sold",
      "code": "S",
      "shares": 4000,
      "value_usd": 461000,
      "date": "2026-03-27",
      "filed": "2026-03-31",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526133508/0001193125-26-133508-index.htm"
    },
    {
      "owner": "Mark Steven Bender",
      "role": "EVP & CFO",
      "action": "sold",
      "code": "S",
      "shares": 16413,
      "value_usd": 1847119,
      "date": "2026-03-27",
      "filed": "2026-03-30",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526131706/0001193125-26-131706-index.htm"
    },
    {
      "owner": "Mark Steven Bender",
      "role": "EVP & CFO",
      "action": "sold",
      "code": "S",
      "shares": 17409,
      "value_usd": 1756999,
      "date": "2026-02-27",
      "filed": "2026-03-02",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526084672/0001193125-26-084672-index.htm"
    },
    {
      "owner": "Albert Chao",
      "role": "Executive Chairman",
      "action": "sold",
      "code": "S",
      "shares": 40836,
      "value_usd": 3004513,
      "date": "2025-12-22",
      "filed": "2025-12-23",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312525329926/0001193125-25-329926-index.htm"
    }
  ],
  "quotes": [],
  "latest_filings": [
    {
      "form": "8-K",
      "filed": "2026-09-29",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000067/wlk-20260924.htm"
    },
    {
      "form": "10-K",
      "filed": "2026-02-26",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000016/wlk-20251231.htm"
    },
    {
      "form": "10-Q",
      "filed": "2026-08-05",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000126282326000032/wlk-20260630.htm"
    },
    {
      "form": "DEF 14A",
      "filed": "2026-04-02",
      "source_url": "https://www.sec.gov/Archives/edgar/data/1262823/000119312526138974/d49581ddef14a.htm"
    }
  ],
  "source": "SEC EDGAR filings, read by Steadybase. Every value links to the filing it came from."
}