Company filings profile · CIK 0001262823
WESTLAKE CORP — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for WESTLAKE CORP (WLK): 30 filings in the last 90 days vs 18 in the prior 90 (filing-velocity rising ↑ · 1.67×). Latest material 8-K events, insider Form-4 transactions, and periodic reports — monitored for change.
✔ Verified against the public SEC EDGAR filing record as of Sep 29, 2026. Source-linked, daily-refreshed.
Material 8-K events — WESTLAKE CORP
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Sep 29, 2026 | Costs of Exit/Disposal Activities; Regulation FD Disclosure | ↗ |
| Aug 31, 2026 | Departure/Election of Directors or Officers | ↗ |
| Aug 4, 2026 | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Jul 29, 2026 | Other Events | ↗ |
| Jun 15, 2026 | Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| May 18, 2026 | Item 5.07 | ↗ |
| May 5, 2026 | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| May 1, 2026 | Regulation FD Disclosure | ↗ |
| Apr 20, 2026 | Departure/Election of Directors or Officers; Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
Watch WESTLAKE CORP automatically
Add this company to a watchlist and get a webhook/email the moment it files a material 8-K, an insider Form 4, or changes its risk-factor language.
Insider transactions (Form 4 / 3 / 5)
Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Sep 29, 2026 | 8-K | Costs of Exit/Disposal Activities; Regulation FD Disclosure | ↗ |
| Sep 1, 2026 | 4 | 4 | ↗ |
| Aug 31, 2026 | 3 | 3 | ↗ |
| Aug 31, 2026 | 8-K | Departure/Election of Directors or Officers | ↗ |
| Aug 21, 2026 | CERT | NYSE TEXAS CERTIFICATION | ↗ |
| Aug 21, 2026 | 8-A12B | 8-A12B | ↗ |
| Aug 17, 2026 | 4 | 4 | ↗ |
| Aug 17, 2026 | 4 | 4 | ↗ |
| Aug 17, 2026 | 4 | 4 | ↗ |
| Aug 17, 2026 | 4 | 4 | ↗ |
| Aug 17, 2026 | 4 | 4 | ↗ |
| Aug 17, 2026 | 4 | 4 | ↗ |
| Aug 17, 2026 | 4 | 4 | ↗ |
| Aug 17, 2026 | 4 | 4 | ↗ |
| Aug 17, 2026 | 4 | 4 | ↗ |
| Aug 17, 2026 | 4 | 4 | ↗ |
| Aug 11, 2026 | 4 | 4 | ↗ |
| Aug 11, 2026 | 144 | ↗ | |
| Aug 10, 2026 | 4 | 4 | ↗ |
| Aug 10, 2026 | 4 | 4 | ↗ |
| Aug 10, 2026 | 4 | 4 | ↗ |
| Aug 10, 2026 | 4 | 4 | ↗ |
| Aug 10, 2026 | 4 | 4 | ↗ |
| Aug 10, 2026 | 4 | 4 | ↗ |
| Aug 10, 2026 | 4 | 4 | ↗ |
| Aug 10, 2026 | 4 | 4 | ↗ |
| Aug 10, 2026 | 4 | 4 | ↗ |
| Aug 5, 2026 | 10-Q | 10-Q | ↗ |
| Aug 4, 2026 | 8-K | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Jul 29, 2026 | 8-K | Other Events | ↗ |
| Jun 16, 2026 | 4 | 4 | ↗ |
| Jun 15, 2026 | 8-K | Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Jun 15, 2026 | 3 | 3 | ↗ |
| May 18, 2026 | SD | SD | ↗ |
| May 18, 2026 | 8-K | Item 5.07 | ↗ |
| May 14, 2026 | 4 | 4 | ↗ |
| May 6, 2026 | 10-Q | 10-Q | ↗ |
| May 5, 2026 | 8-K | Results of Operations (earnings); Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| May 1, 2026 | 8-K | Regulation FD Disclosure | ↗ |
| Apr 20, 2026 | 8-K | Departure/Election of Directors or Officers; Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |