{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-24-178844","form_type":"8-K","ticker":"WLKP","cik":"0001604665","company_name":"Westlake Chemical Partners LP","filed_at":"2024-07-15T23:59:59+00:00","discovered_at":"2026-05-14T18:03:13.739269+00:00","generated_at":"2026-05-31T20:42:27.225432+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Westlake Chemical Partners appoints Jean-Marc Gilson CEO; Chao family transitions to chairman roles","bullets":["James Chao becomes Senior Chairman; Albert Chao becomes Executive Chairman of the General Partner.","Jean-Marc Gilson appointed President, CEO, and Director of Westlake Chemical Partners GP LLC, effective July 15, 2024.","Gilson also appointed President and CEO of Westlake Corporation (NYSE: WLK), the indirect parent.","Gilson previously served as President and CEO of Mitsubishi Chemical Group Corporation from April 2021 to April 2024.","Leadership change is part of a planned succession process with no sudden departures."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-24-178844","json":"https://secwatch.observer/filing/0001193125-24-178844.json","markdown":"https://secwatch.observer/filing/0001193125-24-178844.md","text":"https://secwatch.observer/filing/0001193125-24-178844.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1604665/000119312524178844/0001193125-24-178844-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1604665/000119312524178844/d851112d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-31T20:42:27.225432+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":"60f788bf45","claim":"Albert Chao changed role as Executive Chairman of the Board of the General Partner at Westlake Chemical Partners LP.","evidence_excerpt":"Albert Chao, formerly the President, Chief Executive Officer and Director of the General Partner, transitioned to the position of Executive Chairman of the Board of the General Partner;","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1604665/000119312524178844/0001193125-24-178844-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"transitioned"},{"label":"Role","value":"Executive Chairman of the Board of the General Partner"}],"fact_type":"executive_change"},{"claim_id":"e73f53fb66","claim":"Jean-Marc Gilson was appointed as President, Chief Executive Officer and Director of the General Partner at Westlake Chemical Partners LP.","evidence_excerpt":"Jean-Marc Gilson was appointed as the President, Chief Executive Officer and Director of the General Partner.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1604665/000119312524178844/0001193125-24-178844-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"President, Chief Executive Officer and Director of the General Partner"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}