---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-178846"
form_type: "8-K"
ticker: "WLK"
cik: "0001262823"
company_name: "WESTLAKE CORP"
filed_at: "2024-07-15T23:59:59+00:00"
generated_at: "2026-05-31T20:39:30.219362+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Westlake appoints Jean-Marc Gilson as President and CEO; Chao family moves to Chairman roles

## Summary
- Jean-Marc Gilson (former CEO of Mitsubishi Chemical Group) becomes President and CEO effective July 15, 2024.
- Albert Chao transitions to Executive Chairman; James Chao becomes Senior Chairman.
- Gilson receives $1.25M base salary, 120% target bonus, LTI 400% of base, and $3M sign-on RSUs vesting in 3 years.
- Leadership change is culmination of board's succession planning; first non-family CEO.
- Gilson also appointed President and CEO of Westlake Chemical Partners GP LLC (WLKP).

## SEC filing metadata
- accession: 0001193125-24-178846
- form_type: 8-K
- ticker: WLK
- cik: 0001262823
- company_name: WESTLAKE CORP
- filed_at: 2024-07-15T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1262823/000119312524178846/0001193125-24-178846-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1262823/000119312524178846/d849268d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-178846
- JSON: https://secwatch.observer/filing/0001193125-24-178846.json
- Plain text: https://secwatch.observer/filing/0001193125-24-178846.txt

## Key facts
- Executive change
  Albert Chao changed role as Executive Chairman of the Board at WESTLAKE CORP.
  - Action: transitioned to
  - Role: Executive Chairman of the Board
  source text: Albert Chao, formerly the President, Chief Executive Officer and Director of the Company, transitioned to the position of Executive Chairman of the Board.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1262823/000119312524178846/0001193125-24-178846-index.htm
- Executive change
  Jean-Marc Gilson was appointed as President and Chief Executive Officer at WESTLAKE CORP.
  - Action: appointed
  - Role: President and Chief Executive Officer
  source text: Jean-Marc Gilson was appointed as the President and Chief Executive Officer of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1262823/000119312524178846/0001193125-24-178846-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.