WESTLAKE CORP — Investor Relations & Filings
Westlake Corporation is a global manufacturer and supplier of materials and innovative products. The company's core business involves the production of petrochemicals, polymers, and fabricated building products. These materials serve as essential components for a wide range of applications and are utilized in vital solutions across diverse sectors, including packaging, healthcare, automotive, consumer goods, and building and construction. Westlake's operations are structured around key product areas, such as olefins and vinyls, which provide the foundational building blocks for numerous everyday items.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| SD | 2026-05-18 | English | |
| 8-K | 2026-05-18 | English | |
| 10-Q - WESTLAKE CORP (0001262823) (Filer) | 2026-05-06 | English | |
| 8-K - WESTLAKE CORP (0001262823) (Filer) | 2026-05-05 | English | |
| 8-K - WESTLAKE CORP (0001262823) (Filer) | 2026-04-20 | English | |
| 8-K - WESTLAKE CORP (0001262823) (Filer) | 2026-04-14 | English |
Browse filings by year
17 yearsMarket data
Market data not available
Price history
Peer group · Manufacture of basic chemicals
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Alkali Metals Limited
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ALKİM ALKALİ KİMYA A.Ş.
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Alkyl Amines Chemicals Ltd.
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WESTLAKE CORP via the API
Pull this company's filings, identifiers, and metadata as JSON or Markdown. Authenticate with your API key, then query by company ID, ISIN, or LEI. Full schema documented in the OpenAPI spec.
Endpoints
| GET | /api/companies/30551/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=30551 | Paginated list of all filings (filterable by type, date, language) |
| GET | /api/filings/{id}/ | Single filing — metadata, document URL, processing status |
| GET | /api/filings/{id}/markdown/ | Filing content as Markdown (PDF → text/tables/figures) |
| GET | /api/isins/?company=30551 | All ISINs registered to this company |
| GET | /api/filing-types/ | Reference: every filing-type code + category |
cURL
$ curl https://api.financialreports.eu/api/filings/?company=30551 \ -H "x-api-key: $FR_API_KEY" \ -H "Accept: application/json"
Python
import requests r = requests.get( "https://api.financialreports.eu/api/filings/", params={"company": 30551}, headers={"x-api-key": API_KEY}, ) filings = r.json()["results"]
MCP server
// MCP server URL https://mcp.financialfilings.com/mcp // Once connected, the LLM can query this company directly: "Pull the latest 5 filings for WESTLAKE CORP (id: 30551)"
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