{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-26-034691","form_type":"8-K","ticker":"DINO","cik":"0001915657","company_name":"HF Sinclair Corp","filed_at":"2026-05-13T21:18:13+00:00","discovered_at":"2026-05-13T21:20:00.307328+00:00","generated_at":"2026-05-13T21:20:27.755311+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"negative","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"HF Sinclair terminates CFO Atanas Atanasov effective May 13, 2026","bullets":["Atanas Atanasov's employment as EVP and CFO terminated immediately; he had been on leave since Feb 24, 2026.","Vivek Garg, VP and CAO, continues as acting CFO, a role he assumed on Feb 24, 2026.","If conditions of the Severance Pay Plan are met, Atanasov will receive severance benefits.","No successor CFO has been announced; further leadership changes may follow."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-26-034691","json":"https://secwatch.observer/filing/0001628280-26-034691.json","markdown":"https://secwatch.observer/filing/0001628280-26-034691.md","text":"https://secwatch.observer/filing/0001628280-26-034691.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1915657/000162828026034691/0001628280-26-034691-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1915657/000162828026034691/dino-20260513.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-13T21:20:27.755311+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":"028ed00244","claim":"Vivek Garg changed role as acting Chief Financial Officer at HF Sinclair Corp.","evidence_excerpt":"As previously reported, effective February 24, 2026, the Board of Directors of the Company appointed Mr. Vivek Garg, the Company’s Vice President, Chief Accounting Officer and Controller, to serve as the Company’s acting Chief Financial Officer.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1915657/000162828026034691/0001628280-26-034691-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"continues as acting CFO"},{"label":"Role","value":"acting Chief Financial Officer"}],"fact_type":"executive_change"},{"claim_id":"eca915bf23","claim":"Atanas Atanasov was terminated as Executive Vice President and Chief Financial Officer at HF Sinclair Corp.","evidence_excerpt":"On May 13, 2026, HF Sinclair Corporation (the “ Company ”) terminated the employment of Mr. Atanas Atanasov as Executive Vice President and Chief Financial Officer of the Company, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1915657/000162828026034691/0001628280-26-034691-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"terminated"},{"label":"Role","value":"Executive Vice President and Chief Financial Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}