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WESTLAKE CORP — Investor Relations & Filings

Ticker · WLK ISIN · US9604131022 LEI · GOXNEVUM0LL78B1OS344 US Manufacturing
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Filings indexed 1,312 across all filing types
Latest filing 2026-05-18 Regulatory Filings
Country US United States of America
Listing US WLK

About WESTLAKE CORP

https://www.westlake.com/

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
Regulatory Filings Classification · 90% confidence The document is a Form SD “Specialized Disclosure Report” filed under SEC Rule 13p-1 for conflict minerals compliance. It is a regulatory compliance filing rather than an annual or interim financial report, earnings release, proxy statement, or presentation. It contains no substantive financial statements but fulfills a specialized disclosure requirement, making it a general regulatory filing. Therefore, the correct classification is RNS (Regulatory Filings).
2026-05-18 English
8-K
Regulatory Filings
2026-05-18 English
10-Q - WESTLAKE CORP (0001262823) (Filer)
Interim / Quarterly Report Q1 2026
2026-05-06 English
8-K - WESTLAKE CORP (0001262823) (Filer)
Regulatory Filings Classification · 79% confidence The document is a Form 8-K current report filed with the SEC, fulfilling Section 13/15(d) requirements. It furnishes a press release (Exhibit 99.1) and an investor presentation (Exhibit 99.2) regarding first quarter results, but does not itself present substantive financial statements. This is a regulatory announcement (Form 8-K) rather than a standalone annual/interim report or earnings release. Under the taxonomy, it falls into the general Regulatory Filings category.
2026-05-05 English
8-K - WESTLAKE CORP (0001262823) (Filer)
Board/Management Information Classification · 95% confidence The document is a Form 8-K filed with the SEC, which is used for current reports on significant events. The content details the appointment of a new Senior Vice President and Chief Financial Officer, including biographical information, compensation details, and related corporate governance matters. There is no financial statement or comprehensive financial data presented. The primary focus is on management changes. According to the filing definitions, announcements of changes in senior management or board members fall under 'Board/Management Information' (MANG). The document length is 6547 characters, which is sufficient for a detailed announcement but does not constitute a full financial report. Therefore, the appropriate classification is MANG with high confidence.
2026-04-20 English
8-K - WESTLAKE CORP (0001262823) (Filer)
Legal Proceedings Report Classification · 100% confidence The document is a Form 8-K Current Report filed with the SEC, dated April 13, 2026. It reports on a legal settlement agreement related to ongoing antitrust litigation involving the company. The content focuses on legal proceedings and settlement details, not on financial results, management changes, or other report types. The document is a regulatory announcement about a legal matter, fitting the category of Legal Proceedings Report (LTR).
2026-04-14 English

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