WLK insider transaction filings
WESTLAKE CORP — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-09-01. Screen WLK transaction legs live →
Insider transaction summary — last 90 days
2026-06-24 to 2026-09-22, from the filings listed below: 21 Form 4 filings. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 2 legs across 1 filing by 1 insider — 38,873 shares, $3,120,775 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 31.
- Largest priced transaction: sale of 31,384 shares @ $80.42 ($2,523,901) by Chao Albert, filed 2026-08-11.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| Chao Albert — Executive Chairman, Director | 1 | — | 2 legs · 38,873 sh · $3,120,775 | 2 |
| CREGG ROGER A — Director | 2 | — | — | 3 |
| Chao Catherine T. — Director | 2 | — | — | 3 |
| Chao David Tsung-Hung — Director | 2 | — | — | 3 |
| Graff Michael J — Director | 2 | — | — | 3 |
| Lubel Kimberly S — Director | 2 | — | — | 3 |
| MCCOLLUM MARK A — Director | 2 | — | — | 3 |
| NORTHCUTT R BRUCE — Director | 2 | — | — | 3 |
| Sabat Carolyn Chao — Director | 2 | — | — | 3 |
| Sheets Jeffrey Wayne — Director | 2 | — | — | 3 |
+2 more insiders in the window, not shown — every filing appears in the table below.
Recent Form 4 filings — WESTLAKE CORP
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-01 | 4 | Darby Tommy — VP and CAO | Grant/award (A): 1,791 (derivative) @ $0 | EDGAR |
| 2026-08-17 | 4 | Graff Michael J — Director | Grant/award (A): 2,184 (derivative) @ $0 | EDGAR |
| 2026-08-17 | 4 | Lubel Kimberly S — Director | Grant/award (A): 2,184 (derivative) @ $0 | EDGAR |
| 2026-08-17 | 4 | MCCOLLUM MARK A — Director | Grant/award (A): 2,184 (derivative) @ $0 | EDGAR |
| 2026-08-17 | 4 | NORTHCUTT R BRUCE — Director | Grant/award (A): 2,184 (derivative) @ $0 | EDGAR |
| 2026-08-17 | 4 | Patel Bhavesh V. — Director | Grant/award (A): 2,184 (derivative) @ $0 | EDGAR |
| 2026-08-17 | 4 | Sabat Carolyn Chao — Director | Grant/award (A): 2,184 (derivative) @ $0 | EDGAR |
| 2026-08-17 | 4 | Sheets Jeffrey Wayne — Director | Grant/award (A): 2,184 (derivative) @ $0 | EDGAR |
| 2026-08-17 | 4 | Chao Catherine T. — Director | Grant/award (A): 2,184 (derivative) @ $0 | EDGAR |
| 2026-08-17 | 4 | Chao David Tsung-Hung — Director | Grant/award (A): 2,184 (derivative) @ $0 | EDGAR |
| 2026-08-17 | 4 | CREGG ROGER A — Director | Grant/award (A): 2,184 (derivative) @ $0 | EDGAR |
| 2026-08-11 | 4 | Chao Albert — Executive Chairman, Director | Option exercise (M): 38,873 @ $61.87 · Sale (S): 7,489 @ $79.70 · Sale (S): 31,384 @ $80.42 · Option exercise (M): 38,873 (derivative) @ $0 | EDGAR |
| 2026-08-10 | 4 | Sabat Carolyn Chao — Director | Option exercise (M): 2,168 · Option exercise (M): 2,168 (derivative) @ $0 | EDGAR |
| 2026-08-10 | 4 | Sheets Jeffrey Wayne — Director | Option exercise (M): 2,168 · Option exercise (M): 2,168 (derivative) @ $0 | EDGAR |
| 2026-08-10 | 4 | Chao Catherine T. — Director | Option exercise (M): 2,168 · Option exercise (M): 2,168 (derivative) @ $0 | EDGAR |
| 2026-08-10 | 4 | Chao David Tsung-Hung — Director | Option exercise (M): 2,168 · Option exercise (M): 2,168 (derivative) @ $0 | EDGAR |
| 2026-08-10 | 4 | CREGG ROGER A — Director | Option exercise (M): 2,168 · Option exercise (M): 2,168 (derivative) @ $0 | EDGAR |
| 2026-08-10 | 4 | Graff Michael J — Director | Option exercise (M): 2,168 · Option exercise (M): 2,168 (derivative) @ $0 | EDGAR |
| 2026-08-10 | 4 | Lubel Kimberly S — Director | Option exercise (M): 2,168 · Option exercise (M): 2,168 (derivative) @ $0 | EDGAR |
| 2026-08-10 | 4 | MCCOLLUM MARK A — Director | Option exercise (M): 2,168 · Option exercise (M): 2,168 (derivative) @ $0 | EDGAR |
| 2026-08-10 | 4 | NORTHCUTT R BRUCE — Director | Option exercise (M): 2,168 · Option exercise (M): 2,168 (derivative) @ $0 | EDGAR |
| 2026-06-16 | 4 | Baksht Jonathan — SVP and CFO | Grant/award (A): 20,580 (derivative) @ $0 | EDGAR |
| 2026-05-14 | 4 | Bender Mark Steven — EVP & CFO | Option exercise (M): 13,164 @ $0 · Tax withholding (F): 5,284 @ $97.34 · Option exercise (M): 13,164 (derivative) @ $0 | EDGAR |
| 2026-04-06 | 4 | Powers Brian John — SVP, PEM Segment Head | Grant/award (A): 1,961 (derivative) @ $0 | EDGAR |
| 2026-03-31 | 4 | Buesinger Robert F. — EVP, PEM Segment Head | Sale (S): 4,000 @ $115.25 | EDGAR |
| 2026-03-30 | 4 | Bender Mark Steven — EVP & CFO | Sale (S): 16,413 @ $112.53 | EDGAR |
| 2026-03-06 | 4/A | Bender Mark Steven — EVP & CFO | Tax withholding (F): 1,171 @ $104.96 | EDGAR |
| 2026-03-02 | 4 | Bender Mark Steven — EVP & CFO | Option exercise (M): 6,199 @ $65.81 · Option exercise (M): 6,494 @ $86.54 · Disposition to issuer (D): 12,693 @ $98.20 · Sale (S): 16,988 @ $100.91 · Sale (S): 421 @ $101.52 · Option exercise (M): 6,199 (derivative) @ $0 · +1 more | EDGAR |
| 2026-02-24 | 4 | Patel Bhavesh V. — Director | Grant/award (A): 1,852 (derivative) @ $0 | EDGAR |
| 2026-02-23 | 4 | Szwejbka Scott Thomas — SVP, HIP Segment Head | Grant/award (A): 365 @ $0 · Tax withholding (F): 91 @ $94.10 · Grant/award (A): 14,595 (derivative) @ $0 · Grant/award (A): 3,983 (derivative) @ $0 | EDGAR |
| 2026-02-23 | 4 | Holy Jeffrey Adam — VP and CAO | Grant/award (A): 264 @ $0 · Tax withholding (F): 81 @ $94.10 · Grant/award (A): 4,394 (derivative) @ $0 · Grant/award (A): 1,199 (derivative) @ $0 · Grant/award (A): 2,540 (derivative) @ $0 | EDGAR |
| 2026-02-23 | 4 | Gilson Jean-Marc — President and CEO | Grant/award (A): 109,139 (derivative) @ $0 · Grant/award (A): 29,784 (derivative) @ $0 | EDGAR |
| 2026-02-23 | 4 | Ederington L. Benjamin — EVP, Legal & External Affairs | Grant/award (A): 1,425 @ $0 · Tax withholding (F): 357 @ $94.10 · Grant/award (A): 25,656 (derivative) @ $0 · Grant/award (A): 7,002 (derivative) @ $0 | EDGAR |
| 2026-02-23 | 4 | Buesinger Robert F. — EVP, PEM Segment Head | Grant/award (A): 1,301 @ $0 · Tax withholding (F): 326 @ $94.10 · Grant/award (A): 19,351 (derivative) @ $0 · Grant/award (A): 5,281 (derivative) @ $0 | EDGAR |
| 2026-02-23 | 4 | Bender Mark Steven — EVP & CFO | Grant/award (A): 1,777 @ $0 · Tax withholding (F): 445 @ $94.10 · Grant/award (A): 28,389 (derivative) @ $0 · Grant/award (A): 7,747 (derivative) @ $0 | EDGAR |
| 2026-02-23 | 4 | Chao John Tsung-chen — Director | Grant/award (A): 213 @ $0 · Tax withholding (F): 91 @ $94.10 · Grant/award (A): 4,044 (derivative) @ $0 · Grant/award (A): 1,104 (derivative) @ $0 · Grant/award (A): 2,434 (derivative) @ $0 | EDGAR |
| 2026-02-23 | 4 | Chao Albert — Executive Chairman, Director | Grant/award (A): 6,193 @ $0 · Tax withholding (F): 2,501 @ $94.10 · Grant/award (A): 54,763 (derivative) @ $0 · Grant/award (A): 14,945 (derivative) @ $0 | EDGAR |
| 2026-02-23 | 4 | Chao James — Senior Chairman, Director | Grant/award (A): 3,884 @ $0 · Tax withholding (F): 1,569 @ $94.10 · Grant/award (A): 27,382 (derivative) @ $0 · Grant/award (A): 7,472 (derivative) @ $0 | EDGAR |
| 2026-02-19 | 4 | Szwejbka Scott Thomas — SVP, HIP Segment Head | Option exercise (M): 977 @ $0 · Tax withholding (F): 295 @ $98.95 · Option exercise (M): 977 (derivative) @ $0 | EDGAR |
| 2026-02-19 | 4 | Holy Jeffrey Adam — VP and CAO | Option exercise (M): 706 @ $0 · Tax withholding (F): 213 @ $98.95 · Option exercise (M): 706 (derivative) @ $0 | EDGAR |
| 2026-02-19 | 4 | Ederington L. Benjamin — EVP, Legal & External Affairs | Option exercise (M): 3,809 @ $0 · Tax withholding (F): 978 @ $98.95 · Option exercise (M): 3,809 (derivative) @ $0 | EDGAR |
| 2026-02-19 | 4 | Chao James — Senior Chairman, Director | Option exercise (M): 10,382 @ $0 · Tax withholding (F): 2,664 @ $98.95 · Option exercise (M): 10,382 (derivative) @ $0 | EDGAR |
| 2026-02-19 | 4 | Chao John Tsung-chen — Director | Option exercise (M): 570 @ $0 · Tax withholding (F): 242 @ $98.95 · Option exercise (M): 570 (derivative) @ $0 | EDGAR |
| 2026-02-19 | 4 | Chao Albert — Executive Chairman, Director | Option exercise (M): 16,555 @ $0 · Tax withholding (F): 5,089 @ $98.95 · Option exercise (M): 16,555 (derivative) @ $0 | EDGAR |
| 2026-02-19 | 4 | Buesinger Robert F. — EVP, PEM Segment Head | Option exercise (M): 3,478 @ $0 · Tax withholding (F): 903 @ $98.95 · Option exercise (M): 3,478 (derivative) @ $0 | EDGAR |
| 2026-02-19 | 4 | Bender Mark Steven — EVP & CFO | Option exercise (M): 4,751 @ $0 · Tax withholding (F): 1,209 @ $98.95 · Option exercise (M): 4,751 (derivative) @ $0 | EDGAR |
| 2025-12-23 | 4 | Chao Albert — Executive Chairman, Director | Option exercise (M): 81,673 @ $44.42 · Sale (S): 9,711 @ $72.82 · Sale (S): 30,604 @ $73.80 · Sale (S): 521 @ $74.44 · Option exercise (M): 81,673 (derivative) @ $0 | EDGAR |
| 2025-12-10 | 4 | CREGG ROGER A — Director | Option exercise (M): 1,339 · Option exercise (M): 1,339 (derivative) @ $0 | EDGAR |
| 2025-10-03 | 4 | Szwejbka Scott Thomas — SVP, HIP Segment Head | Option exercise (M): 10,840 @ $0 · Tax withholding (F): 3,842 @ $76.70 · Option exercise (M): 10,840 (derivative) @ $0 | EDGAR |
| 2025-08-29 | 4 | Chao James — Senior Chairman, Director | Gift (G): 15,140 @ $0 | EDGAR |
Recent 8-K events — WESTLAKE CORP
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-08-31 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers | EDGAR |
| 2026-08-04 | 8-K | 2.02 — Results of Operations and Financial Condition 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-07-29 | 8-K | 8.01 — Other Events | EDGAR |
| 2026-06-15 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-18 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-05-05 | 8-K | 2.02 — Results of Operations and Financial Condition 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-01 | 8-K | 7.01 — Regulation FD Disclosure | EDGAR |
| 2026-04-20 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-04-14 | 8-K | 8.01 — Other Events | EDGAR |
| 2026-04-06 | 8-K | 1.01 — Entry into a Material Definitive Agreement 1.02 — Termination of a Material Definitive Agreement 2.03 — Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant 9.01 — Financial Statements and Exhibits | EDGAR |
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