{"schema_version":"secwatch.filing_event.v1","accession":"0001759631-21-000046","form_type":"8-K","ticker":"HYLN","cik":"0001759631","company_name":"Hyliion Holdings Corp.","filed_at":"2021-08-24T23:59:59+00:00","discovered_at":"2026-05-14T18:04:19.519621+00:00","generated_at":"2026-06-29T08:11:50.259991+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Hyliion appoints former U.S. Transportation Secretary Elaine Chao to board","bullets":["Elaine Chao appointed as Class I director, term expiring at 2024 annual meeting.","She will serve on the Nominating and Corporate Governance Committee.","Board size increases to eight directors; no arrangements or transactions disclosed.","Chao brings experience as former Secretary of Transportation, Labor, and Fortune 500 board member.","Compensation same as other non-employee directors; indemnification agreement executed."],"urls":{"canonical":"https://secwatch.observer/filing/0001759631-21-000046","json":"https://secwatch.observer/filing/0001759631-21-000046.json","markdown":"https://secwatch.observer/filing/0001759631-21-000046.md","text":"https://secwatch.observer/filing/0001759631-21-000046.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1759631/000175963121000046/0001759631-21-000046-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1759631/000175963121000046/hyln-20210819.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T08:11:50.259991+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":"9626279b72","claim":"Elaine L. Chao was appointed as Director at Hyliion Holdings Corp..","evidence_excerpt":"On August 19, 2021, the Board of Directors of Hyliion Holdings Corp. (the “Company”) appointed Elaine L. Chao, age 68, to the Board of Directors.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1759631/000175963121000046/0001759631-21-000046-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}