WLK insider trading
NYSE Basic MaterialsWESTLAKE CORP — scored insider trade history from SEC Form 4 filings, parsed and contextualised by FilingIQ.
About WESTLAKE CORP
Westlake Corporation manufactures and markets performance and essential materials, and housing and infrastructure products in the United States, Canada, Germany, China, Mexico, Brazil, France, Italy, and internationally. The Performance and Essential Materials segment offers ethylene, polyethylene, styrene, chlor-alkali, chlorinated derivative products, ethylene dichloride, vinyl chloride monomer, polyvinyl chloride (PVC), epoxy specialty resins, and base epoxy resins and intermediaries. The Housing and Infrastructure Products segment provides residential PVC sidings; PVC trim and mouldings; architectural stone veneers; windows; PVC decking; PVC films for various inflatables, wallcovering, and tape and roofing applications; polymer composite and cement roof tiles; PVC pipes and fittings for various water, sewer, electrical, and industrial applications; and PVC compounds for various housing, medical, and automobile products. This segment also offers consumer and commercial products, such as landscape edging; industrial, home, and office matting; marine dock edging; and masonry joint controls. It offers its products to chemical processors; plastics fabricators; small construction contractors; municipalities; and supply warehouses for use in various consumer and industrial markets, including residential construction, flexible and rigid packaging, automotive products, healthcare products, water treatment, wind turbines, and coatings, as well as other durable and non-durable goods. The company was formerly known as Westlake Chemical Corporation and changed its name to Westlake Corporation in February 2022. Westlake Corporation was founded in 1986 and is headquartered in Houston, Texas. Westlake Corporation is a subsidiary of TTWF LP.
Company website: www.westlake.com
WLK insider activity at a glance
FilingIQ has scored 1,108 insider transactions for WLK since Mar 9, 2011. The most recent filing in our index is dated May 13, 2026.
Across the full history, 49 open-market purchases
and 154 open-market sales
were filed under transaction codes P and S respectively. Compensatory share awards
(code A) and option exercises (code M) are tracked separately and not counted here.
The average FilingIQ composite score on WLK insider trades is 66.9/100, produced by FilingIQ's multi-factor Form 4 model. Model framework documented at methodology.
Latest WLK Form 4 filings
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Frequently asked
- How many insider trades does FilingIQ track for WLK?
- FilingIQ tracks 1,108 Form 4 insider transactions for WLK (WESTLAKE CORP), covering filings from Mar 9, 2011 onwards. 74 of those were filed in the last 90 days.
- Are WLK insiders net buyers or net sellers?
- Across the full Form 4 history for WLK, 49 transactions (4%) were open-market purchases and 154 (14%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.
- Where does WLK insider data come from?
- Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.
- What sector is WLK in?
- WESTLAKE CORP (WLK) is classified in the Basic Materials sector, specifically Specialty Chemicals, with a current market capitalisation of $13.21B.
Methodology & sources
Every WLK insider transaction shown on FilingIQ is parsed directly from a public SEC Form 4 XML filing. Insider identity is normalised across reporting variants (CIK changes, name spellings, related-party indirect holdings). The FilingIQ composite score is documented in full on the team page and algo disclosure. Not investment advice; see disclaimer.