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WLKNYSE
WESTLAKE CORP
Industrial Organic Chemicals · DE · CIK 1262823
Westlake Corporation manufactures and supplies essential materials and innovative products for various industries
red 8-K · 90d⚡ Elevated coverage
$11.34B
Market cap
$74.72
Last close
-2.5%
1D
-4.1%
5D
1.3M
Volume
Price · last 39 sessions-35.0%
May 4L $74.72 · H $114.87Jun 29
260
Total filings
Jun 15, 2026
Last filing
12/31
Fiscal year end
8-KReg FD DisclosureJun 15, 20268-KShareholder VoteMay 18, 202610-Q10-QMay 6, 20268-KResults of Operations · Reg FD DisclosureMay 5, 20268-KReg FD DisclosureMay 1, 20268-KExecutive Change · Reg FD DisclosureApr 20, 20268-KCompany UpdateApr 14, 20268-KMaterial Agreement · Agreement TerminatedApr 6, 20268-KExecutive ChangeApr 2, 2026DEFA14ADEFA14AApr 2, 2026DEF 14ADEF 14AApr 2, 202610-K10-KFeb 26, 20268-KResults of Operations · Reg FD DisclosureFeb 24, 20268-KExecutive Change · Reg FD DisclosureFeb 23, 20268-KReg FD DisclosureJan 6, 20268-KExit / Disposal Costs · Reg FD DisclosureDec 15, 20258-KReg FD DisclosureNov 12, 20258-KMaterial Agreement · Reg FD DisclosureNov 5, 2025424B5424B5Nov 5, 20258-KReg FD DisclosureNov 4, 2025424B5424B5Nov 4, 202510-Q10-QOct 31, 20258-KResults of Operations · Reg FD DisclosureOct 30, 20258-KReg FD DisclosureAug 26, 202510-Q10-QAug 6, 20258-KResults of Operations · Reg FD DisclosureAug 5, 20258-KExit / Disposal CostsJun 17, 20258-KShareholder VoteMay 12, 202510-Q10-QMay 2, 20258-KResults of Operations · Reg FD DisclosureMay 2, 20258-KExecutive ChangeApr 16, 2025DEFA14ADEFA14AMar 28, 2025DEF 14ADEF 14AMar 28, 20258-KExecutive ChangeMar 4, 202510-K10-KFeb 25, 20258-KResults of Operations · Reg FD DisclosureFeb 24, 20258-KExecutive ChangeDec 11, 202410-Q10-QNov 6, 20248-KResults of Operations · Reg FD DisclosureNov 5, 20248-KExecutive ChangeAug 12, 202410-Q10-QAug 9, 20248-KResults of Operations · Reg FD DisclosureAug 6, 20248-KExit / Disposal CostsJul 29, 20248-KExecutive Change · Reg FD DisclosureJul 15, 20248-KReg FD DisclosureJul 1, 20248-KReg FD DisclosureJun 13, 20248-KExecutive ChangeMay 29, 20248-KShareholder VoteMay 13, 202410-Q10-QMay 2, 20248-KResults of Operations · Reg FD DisclosureMay 1, 20248-KExecutive ChangeApr 25, 20248-KReg FD DisclosureApr 3, 2024DEFA14ADEFA14AMar 29, 2024DEF 14ADEF 14AMar 29, 202410-K10-KFeb 22, 20248-KResults of Operations · Reg FD DisclosureFeb 20, 20248-KResults of OperationsFeb 6, 202410-Q10-QNov 2, 20238-KResults of Operations · Reg FD DisclosureNov 2, 202310-Q10-QAug 3, 20238-KResults of Operations · Reg FD DisclosureAug 3, 20238-KExecutive Change · Bylaw AmendmentMay 16, 202310-Q10-QMay 4, 20238-KResults of Operations · Reg FD DisclosureMay 4, 20238-KExecutive ChangeApr 5, 2023DEFA14ADEFA14AMar 31, 2023DEF 14ADEF 14AMar 31, 202310-K10-KFeb 22, 20238-KExecutive ChangeFeb 21, 20238-KResults of Operations · Reg FD DisclosureFeb 21, 202310-Q10-QNov 3, 20228-KResults of Operations · Reg FD DisclosureNov 3, 20228-KCompany UpdateAug 15, 202210-Q10-QAug 3, 20228-KResults of Operations · Reg FD DisclosureAug 2, 20228-KMaterial Agreement · Agreement TerminatedJun 9, 20228-KShareholder VoteMay 13, 202210-Q10-QMay 4, 20228-KResults of Operations · Reg FD DisclosureMay 3, 2022DEFA14ADEFA14AApr 1, 2022
Insider Activity
In the 90 days to Mar 27, 2026: 2 sold $4.1M.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 27, 2026 | Bender Mark StevenEVP & CFO | Sell | 16,413 | $112.54 | $1.8M |
| Mar 27, 2026 | Buesinger Robert F.EVP, PEM Segment Head | Sell | 4,000 | $115.25 | $461K |
| Feb 27, 2026 | Bender Mark StevenEVP & CFO | Sell | 16,988 | $100.91 | $1.7M |
| Feb 27, 2026 | Bender Mark StevenEVP & CFO | Sell | 421 | $101.52 | $43K |
| Dec 22, 2025 | Chao AlbertExecutive Chairman | Sell | 30,604 | $73.80 | $2.3M |
| Dec 22, 2025 | Chao AlbertExecutive Chairman | Sell | 9,711 | $72.82 | $707K |
| Dec 22, 2025 | Chao AlbertExecutive Chairman | Sell | 521 | $74.44 | $39K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
In the News
⚡ Elevated coverageCoverage (30d): 4 reputable articles.
ForbesWestlake Corporation6d agoMorningstarInitiating Coverage of Chlor-Alkali-Vinyl Leaders; Shares Undervalued12d agoMorningstarWestlake Has Built Resilience Through Forward Integration12d agoMorningstarNew Morningstar Analyst Report for Westlake Chemical13d ago
Reputable outlets only (Reuters, WSJ, CNBC, Barron's, and peers). More on Google News ↗
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