Westlake Corporation (WLK)
NYSE: WLK · Industrial Organic Chemicals · Houston, TX · filing with the SEC since 2003
Grade5.3
◀ Past 6.7● Present 5.4▶ Future 4.0
Who runs Westlake Corporation
Officers and directors as they report to the SEC on Forms 3, 4 and 5, named as filedChief executive, as filed
Gilson Jean-Marc
President and CEO. First filing Jul 2024, latest Feb 23, 2026, 0 filings in all.
Officers reporting now
12
of 22 people with a filing in the last fifteen months
Directors reporting now
10
36 people on the record since 2006
Officerssales are open-market, Sep 30, 2025 to Sep 30, 2026
| Name | Title as filed | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Darby Tommy | VP and CAO | Aug 2026 | Sep 1, 2026 | none |
| Chao Albert | Executive Chairman | Mar 2006 | Aug 11, 2026 | 5 · $6.1M |
| Baksht Jonathan | SVP and CFO | Jun 2026 | Jun 16, 2026 | none |
| Bender Mark Steven | EVP & CFO | Mar 2006 | May 14, 2026 | 3 · $3.6M |
| Powers Brian John | SVP, PEM Segment Head | Apr 2026 | Apr 6, 2026 | none |
| Buesinger Robert F. | EVP, PEM Segment Head | Apr 2010 | Mar 31, 2026 | 1 · $500,000 |
| Gilson Jean-Marc | President and CEO | Jul 2024 | Feb 23, 2026 | none |
| Chao James | Senior Chairman | Mar 2006 | Feb 23, 2026 | none |
| Chao John Tsung-Chen | VP & MD, Westlake Innovations | Aug 2018 | Feb 23, 2026 | none |
| Ederington L. Benjamin | EVP, Legal & External Affairs | Oct 2013 | Feb 23, 2026 | none |
| Holy Jeffrey Adam | VP and CAO | May 2024 | Feb 23, 2026 | none |
| Szwejbka Scott Thomas | SVP, HIP Segment Head | Apr 2025 | Feb 23, 2026 | none |
Directorssales are open-market, Sep 30, 2025 to Sep 30, 2026
| Name | Role | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Chao Catherine T. | director | May 2023 | Aug 17, 2026 | none |
| Chao David Tsung-Hung | director | Jan 2018 | Aug 17, 2026 | none |
| Cregg Roger A | director | Dec 2024 | Aug 17, 2026 | none |
| Graff Michael J | director | May 2013 | Aug 17, 2026 | none |
| Lubel Kimberly S | director | May 2020 | Aug 17, 2026 | none |
| Mccollum Mark A | director | May 2018 | Aug 17, 2026 | none |
| Northcutt R Bruce | director | May 2013 | Aug 17, 2026 | none |
| Patel Bhavesh V. | director | Feb 2026 | Aug 17, 2026 | none |
| Sabat Carolyn Chao | director | May 2023 | Aug 17, 2026 | none |
| Sheets Jeffrey Wayne | director | Jan 2018 | Aug 17, 2026 | none |
Earlier names on the record15, newest filing first
Janssens Thomas J. · officer · last filing Feb 2025Haas Marius · director · last filing Aug 2024Zoeller Johnathan Stevan · officer · last filing Mar 2024Kearns Roger L. · officer · last filing Mar 2023Jenkins Dorothy C · director · last filing Aug 2022Kenner Andrew · officer · last filing Feb 2022Teel Lawrence E. · officer · last filing Feb 2021Ttwfgp LLC · 10% owner · last filing Aug 2020Mangieri George J · officer · last filing Feb 2020Lukens Max L · officer · last filing Aug 2019Riley H John Jr · director · last filing Mar 2019Blakely Robert T · director · last filing Aug 2018Schubert Lawrence · officer · last filing Mar 2017Mattina Michael J. · officer · last filing Feb 2017Bates Simon · officer · last filing Sep 2016
A person is listed as reporting now after a filing in the last fifteen months. The record shows when someone last filed; it does not say why they stopped. Each name links to the filings on sec.gov.