{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-26-090129","form_type":"8-K","ticker":"STLD","cik":"0001022671","company_name":"STEEL DYNAMICS INC","filed_at":"2026-08-04T13:57:03+00:00","discovered_at":"2026-08-04T13:58:03.282322+00:00","generated_at":"2026-08-04T13:58:11.988969+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"positive","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"Steel Dynamics CEO Mark Millett to retire Jan 1, 2027; Theresa Wagler named successor","bullets":["Mark D. Millett to retire as CEO effective Jan 1, 2027; will become Executive Chairman.","Theresa E. Wagler, current EVP and CFO, appointed President and CEO effective Jan 1, 2027; also joins board immediately.","Richard A. Poinsatte, EVP and Treasurer, to succeed Wagler as EVP and CFO on Jan 1, 2027.","Additional senior leadership changes effective Sept 1, 2026: Barry Schneider becomes EVP and CTO; Alvarez, Anderson, Graham assume new COO roles."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-26-090129","json":"https://secwatch.observer/filing/0001104659-26-090129.json","markdown":"https://secwatch.observer/filing/0001104659-26-090129.md","text":"https://secwatch.observer/filing/0001104659-26-090129.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/0001104659-26-090129-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/tm2622182d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-08-04T13:58:11.988969+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":"403cbe12bc","claim":"Miguel Alvarez was appointed as Executive Vice President and Chief Operating Officer Aluminum Flat Rolled Products and Metals Recycling Operations at STEEL DYNAMICS INC.","evidence_excerpt":"Miguel Alvarez, the Company’s Senior Vice President Aluminum Group, will become the Company’s Executive Vice President and Chief Operating Officer Aluminum Flat Rolled Products and Metals Recycling Operations","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/0001104659-26-090129-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Executive Vice President and Chief Operating Officer Aluminum Flat Rolled Products and Metals Recycling Operations"}],"fact_type":"executive_change"},{"claim_id":"c836b6b1b4","claim":"James Anderson was appointed as Executive Vice President and Chief Operating Officer Construction Products Operations at STEEL DYNAMICS INC.","evidence_excerpt":"James Anderson, the Company’s Senior Vice President Long Products Steel Group, will become the Company’s Executive Vice President and Chief Operating Officer Construction Products Operations","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/0001104659-26-090129-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Executive Vice President and Chief Operating Officer Construction Products Operations"}],"fact_type":"executive_change"},{"claim_id":"e019d66078","claim":"Richard A. Poinsatte was appointed as Executive Vice President and Chief Financial Officer at STEEL DYNAMICS INC.","evidence_excerpt":"Richard A. Poinsatte, the Company’s Executive Vice President and Treasurer, will become the Company’s Executive Vice President and Chief Financial Officer","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/0001104659-26-090129-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Executive Vice President and Chief Financial Officer"}],"fact_type":"executive_change"},{"claim_id":"e0d98fd567","claim":"Theresa E. Wagler was appointed as President and Chief Executive Officer at STEEL DYNAMICS INC.","evidence_excerpt":"Theresa E. Wagler, the Company’s Executive Vice President and Chief Financial Officer, will become the Company’s President and Chief Executive Officer","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/0001104659-26-090129-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"President and Chief Executive Officer"}],"fact_type":"executive_change"},{"claim_id":"e32d647dc6","claim":"Theresa E. Wagler was appointed as Member of the Board at STEEL DYNAMICS INC.","evidence_excerpt":"Effective immediately, the Board appointed Ms. Wagler as a member of the Board","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/0001104659-26-090129-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Member of the Board"}],"fact_type":"executive_change"},{"claim_id":"e49af129cf","claim":"Christopher Graham was appointed as Executive Vice President and Chief Operating Officer Flat Rolled Steel Operations at STEEL DYNAMICS INC.","evidence_excerpt":"Christopher Graham, the Company’s Senior Vice President Flot Roll Steel Group, will become the Company’s Executive Vice President and Chief Operating Officer Flat Rolled Steel Operations","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/0001104659-26-090129-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Executive Vice President and Chief Operating Officer Flat Rolled Steel Operations"}],"fact_type":"executive_change"},{"claim_id":"e6af87d43f","claim":"Mark D. Millett was appointed as Executive Chairman at STEEL DYNAMICS INC.","evidence_excerpt":"Mark D. Millett, Steel Dynamics, Inc.’s (the “Company”) Chairman and Chief Executive Officer gave notice to the Company’s Board of Directors (the “Board”) of his intention to retire as Chief Executive Officer of the Company effective January 1, 2027.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/0001104659-26-090129-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired as CEO, appointed Executive Chairman"},{"label":"Role","value":"Executive Chairman"}],"fact_type":"executive_change"},{"claim_id":"f20b14fbb4","claim":"Barry Schneider was appointed as Executive Vice President and Chief Technology Officer at STEEL DYNAMICS INC.","evidence_excerpt":"Barry Schneider, the Company’s President and Chief Operating Officer, will become the Company’s Executive Vice President and Chief Technology Officer","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/0001104659-26-090129-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Executive Vice President and Chief Technology Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}