WESTLAKE CORP (WLK) Stock
WLK has an Alpha Score of 26 out of 100 (poor), computed on Oct 31, 2026 from 3 of 4 sub-scores. 3 members of Congress disclosed 28 trades in WLK since 2015: 14 purchases and 14 sales, most recently Susie Lee (sale, Jun 10, 2021). 5 of the hedge funds AlphaScala tracks reported WLK in 13F filings for the quarter ended Jun 30, 2026; the largest reported position is Citadel's at $77.01M. Company insiders reported 0 open-market buys and 2 sales on SEC Form 4 in the 90 days to Nov 3, 2026.
What is WLK's Alpha Score?
How it works →Alpha Score of 26 reflects poor overall profile with poor momentum, weak value, poor quality. Based on 3 of 4 signals – score is capped at 90 until remaining data ingests.
Computed from 3 of 4 sub-scores; a sub-score is left out when its inputs are missing, and the composite is capped accordingly.
Computed Oct 31, 2026
A rules-based research rating, not a recommendation to buy or sell.
Which members of Congress traded WESTLAKE CORP (WLK)?
Most recent: Susie Lee (sale, Jun 10, 2021); records start Sep 25, 2015.
| Politician | Trade date | Type | Amount |
|---|---|---|---|
| Susie Lee D-NV · House | 2021-06-10 | sale | $1k – $15k |
| Peter Meijer R-MI · House | 2021-02-16 | sale | $1k – $15k |
| Susie Lee D-NV · House | 2020-12-16 | purchase | $1k – $15k |
| Susie Lee D-NV · House | 2020-12-10 | purchase | $1k – $15k |
| David Perdue R-GA · Senate | 2017-08-14 | sale | $1k – $15k |
| David Perdue R-GA · Senate | 2017-08-10 | partial sale | $1k – $15k |
| David Perdue R-GA · Senate | 2017-08-09 | partial sale | $1k – $15k |
| David Perdue R-GA · Senate | 2017-08-08 | partial sale | $1k – $15k |
From STOCK Act periodic transaction reports. House filings as of Nov 2, 2026. Senate records here end Oct 21, 2026; later Senate trades are not included.
See all WLK political trades →Which hedge funds own WLK?
From 13F filings| Fund | Shares Held | Position Value | Change vs prior Q |
|---|---|---|---|
| Citadel Ken Griffin | 1.05M | $77.01M | +47% |
| Millennium Management Israel Englander | 366K | $26.72M | +331% |
| D.E. Shaw David Shaw | 201K | $14.64M | -14% |
| Marshall Wace | 112K | $8.14M | NEW |
| Point72 Steve Cohen | 90K | $6.55M | NEW |
13F holdings as of Jun 30, 2026
Explore all tracked funds →Are WESTLAKE CORP insiders buying or selling?
SEC Form 4 filings| Date | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| Aug 11, 26 | Chao Albert | Executive Chairman | SELL | 7.5K | $597K |
| Aug 11, 26 | Chao Albert | Executive Chairman | SELL | 31.4K | $2.5M |
SEC Form 4 filings as of Nov 3, 2026
See cluster-buy signals across all tickers →What are WLK's key statistics?
Key statistics as of Oct 22, 2026
How does WLK's valuation compare with the Materials sector?
| Metric | WLK | Materials median | Companies in median |
|---|---|---|---|
| Net margin | -10.94% | 8.63% | 80 |
| Return on equity | -13.93% | 12.49% | 83 |
| Dividend yield (payers) | 1.85% | 1.83% | 62 |
Medians over the Materials stocks whose key statistics were refreshed in the last 35 days (newest Nov 4, 2026). P/E excludes loss-making companies.
WLK price chart
Powered by TradingViewWhat does WESTLAKE CORP do?
Westlake Corporation is a global diversified industrial company that manufactures and supplies essential materials and products enhancing daily life across multiple sectors. It operates through two primary segments: Performance and Essential Materials, which produces critical building blocks like olefins, vinyl chemicals, polyethylene, and epoxies used in packaging, healthcare, automotive interiors, detergents, pharmaceuticals, and building materials; and Housing and Infrastructure Products, which fabricates finished goods including building products such as siding, stone veneer, roofing, and windows, as well as pipe and fittings for municipal water, sewer, plumbing, mining, and irrigation applications, plus custom compounds for wire, cable, medical devices, and consumer goods. Westlake Corporation serves housing and construction, packaging and healthcare, automotive, and consumer markets with operations in North America, Asia, and Europe. As the second-largest PVC pipe manufacturer in North America, it emphasizes innovative solutions like post-industrial recycled polymers in products such as garden edging and floor mats. Founded in 1986 and headquartered in Houston, Texas, Westlake Corporation delivers vital components for sustainable everyday applications.