{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-205164","form_type":"8-K","ticker":"LAC","cik":"0001966983","company_name":"LITHIUM AMERICAS CORP.","filed_at":"2026-05-05T23:59:59+00:00","discovered_at":"2026-05-14T18:02:33.331830+00:00","generated_at":"2026-05-14T23:34:55.449965+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Lithium Americas appoints former Rio Tinto executive Clayton Walker to board","bullets":["Clayton Walker appointed as independent director effective May 4, 2026.","Walker most recently served as Chief Growth and Development Officer at Rio Tinto; 25+ years in mining.","Will chair Safety & Sustainability Committee and serve on Audit/Risk and Technical committees if re-elected at 2026 annual meeting.","No material interest in any proposed transaction, per company disclosure."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-205164","json":"https://secwatch.observer/filing/0001193125-26-205164.json","markdown":"https://secwatch.observer/filing/0001193125-26-205164.md","text":"https://secwatch.observer/filing/0001193125-26-205164.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1966983/000119312526205164/0001193125-26-205164-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1966983/000119312526205164/d115308d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-14T23:34:55.449965+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":"e1a67eebb7","claim":"Clayton Walker was appointed as member of the Board at LITHIUM AMERICAS CORP..","evidence_excerpt":"On May 4, 2026, the board of directors (the “Board”) of Lithium Americas Corp. (the “Company”) appointed Clayton Walker to serve as a member of the Board, effective May 4, 2026.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1966983/000119312526205164/0001193125-26-205164-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"member of the Board"}]}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}