{"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","discovered_at":"2026-05-14T18:03:12.418341+00:00","generated_at":"2026-05-31T20:39:30.219362+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Westlake appoints Jean-Marc Gilson as President and CEO; Chao family moves to Chairman roles","bullets":["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)."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-24-178846","json":"https://secwatch.observer/filing/0001193125-24-178846.json","markdown":"https://secwatch.observer/filing/0001193125-24-178846.md","text":"https://secwatch.observer/filing/0001193125-24-178846.txt","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"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-31T20:39:30.219362+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"4300bdbea1","claim":"Albert Chao changed role as Executive Chairman of the Board at WESTLAKE CORP.","evidence_excerpt":"Albert Chao, formerly the President, Chief Executive Officer and Director of the Company, transitioned to the position of Executive Chairman of the Board.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1262823/000119312524178846/0001193125-24-178846-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"transitioned to"},{"label":"Role","value":"Executive Chairman of the Board"}],"fact_type":"executive_change"},{"claim_id":"70e50251a2","claim":"Jean-Marc Gilson was appointed as President and Chief Executive Officer at WESTLAKE CORP.","evidence_excerpt":"Jean-Marc Gilson was appointed as the President and Chief Executive Officer of the Company.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1262823/000119312524178846/0001193125-24-178846-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"President and Chief Executive Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}