WLK Westlake Corporation
NYSEActiveCommon stock
WLK is the ticker symbol of Westlake Corporation, which is listed on NYSE. The symbol was previously used by Westlake Chemical Corporation.
WLK at a glance
- Symbol
- WLK
- Company / issuer
- Westlake Corporation
- Security type
- Common stock
- Exchange
- NYSE
- Status
- Actively traded
- Seen in listing files
- Apr 2015 – present
- Sector
- Industrials
- Industry
- Major Chemicals
- Country
- United States
- IPO year
- 2004
- Market cap
- $8.5 billion (Sep 2026)
WLK ticker history
All companies and securities we have recorded under the symbol WLK, from periodic snapshots of US exchange listing files.
| Name | Security | First seen | Last seen |
|---|---|---|---|
| Westlake Chemical Corporation | Common Stock | Apr 2015 | Jan 2022 |
| Westlake Corporation | Common Stock | Feb 2022 | present |
Westlake Corporation company profile
- Industry (SIC)
- Industrial Organic Chemicals
- Headquarters
- Houston, TX
- Incorporated in
- DE
- Fiscal year end
- December 31
- SEC filer category
- Large accelerated filer
- Latest annual report
- 10-K filed 2026-02-26
- Latest interim report
- 10-Q filed 2026-08-05
- SEC CIK
- 1262823
Former company names
- Westlake Chemical Corp (until 2022)
Source: SEC EDGAR filer data.
WLK price chart
Interactive chart provided by TradingView (loads third-party scripts).
Frequently asked questions
What company has the ticker symbol WLK?
WLK is the ticker symbol of Westlake Corporation on NYSE.
Is WLK still trading?
Yes. WLK appears in the current NYSE listings as of Sep 2026.
Which companies have used the ticker WLK?
Our listing records show WLK used by: Westlake Chemical Corporation; Westlake Corporation.
Which exchange is WLK listed on?
WLK is listed on NYSE.
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