{"schema_version":"secwatch.filing_event.v1","accession":"0001213900-23-021085","form_type":"8-K","ticker":"HYLN","cik":"0001759631","company_name":"Hyliion Holdings Corp.","filed_at":"2023-03-17T23:59:59+00:00","discovered_at":"2026-05-14T18:03:46.440368+00:00","generated_at":"2026-06-17T23:39:20.225166+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.45,"calibrated_materiality_score":0.45,"confidence":"high","headline":"Hyliion board resignations of Chao and Jenkins; three new independent directors appointed","bullets":["Directors Elaine L. Chao and Howard Jenkins resigned effective March 17, 2023, with no disagreement with the company.","Board increased from 9 to 10 members; appointed Melanie Trent (Class I, term to 2024), Richard Freeland (Class II, term to 2025), Rodger Boehm (Class III, term to 2023).","Trent chairs Nominating and Corporate Governance; Freeland serves on Compensation and Technology; Boehm serves on Audit and Technology.","All new directors are independent under NYSE and SEC standards and receive standard non-employee director compensation."],"urls":{"canonical":"https://secwatch.observer/filing/0001213900-23-021085","json":"https://secwatch.observer/filing/0001213900-23-021085.json","markdown":"https://secwatch.observer/filing/0001213900-23-021085.md","text":"https://secwatch.observer/filing/0001213900-23-021085.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1759631/000121390023021085/0001213900-23-021085-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1759631/000121390023021085/ea175290-8k_hyliion.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-17T23:39:20.225166+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":"25dac0a71c","claim":"Howard Jenkins resigned as Director at Hyliion Holdings Corp..","evidence_excerpt":"Elaine L. Chao and Howard Jenkins have resigned from the Board of Directors of Hyliion Holdings Corp.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1759631/000121390023021085/0001213900-23-021085-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"71bec2816c","claim":"Rodger Boehm was appointed as Director at Hyliion Holdings Corp..","evidence_excerpt":"Rodger Boehm, age 65, will serve as a Class III director with a term that expires at the Company’s 2023 Annual Meeting of Stockholders.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1759631/000121390023021085/0001213900-23-021085-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"e721a9232a","claim":"Richard Freeland was appointed as Director at Hyliion Holdings Corp..","evidence_excerpt":"Richard Freeland, age 65 will serve as a Class II director with a term that expires at the 2025 Annual Meeting of Stockholders.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1759631/000121390023021085/0001213900-23-021085-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"ea5812629d","claim":"Melanie Trent was appointed as Director at Hyliion Holdings Corp..","evidence_excerpt":"Melanie Trent, age 58 will serve as a Class I director with a term that expires at the Company’s 2024 Annual Meeting of Stockholders.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1759631/000121390023021085/0001213900-23-021085-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"feb20c36a9","claim":"Elaine L. Chao resigned as Director at Hyliion Holdings Corp..","evidence_excerpt":"Elaine L. Chao and Howard Jenkins have resigned from the Board of Directors of Hyliion Holdings Corp.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1759631/000121390023021085/0001213900-23-021085-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"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"}