{"filing":{"accession_number":"0001104659-26-090129","cik":"0001022671","ticker":"STLD","company_name":"STEEL DYNAMICS INC","form":"8-K","filing_date":"2026-08-04","report_date":"2026-08-03","primary_document":"tm2622182d1_8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1022671/000110465926090129/tm2622182d1_8k.htm"},"events":[{"id":23827,"run_id":21552,"accession_number":"0001104659-26-090129","anchor_item_number":"5.02","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"summary":"Theresa E. Wagler was appointed President and Chief Executive Officer effective January 1, 2027, succeeding Mark D. Millett who is retiring from the CEO role to become Executive Chairman. The appointment also includes promotions of other senior officers (Poinsatte as CFO, Schneider, Alvarez, Anderson, and Graham in expanded roles), reflecting a comprehensive executive succession plan.","company_name":"STEEL DYNAMICS INC","ticker":"STLD","filing_date":"2026-08-04","form":"8-K","submitted_at":null,"items":[{"id":24166,"accession_number":"0001104659-26-090129","item_number":"5.02","item_title":"Departure of Directors or Certain","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"reasoning":"The filing discloses multiple executive appointments effective January 1, 2027 and September 1, 2026, with the principal event being Theresa E. Wagler's appointment as President and Chief Executive Officer, succeeding Mark D. Millett who is retiring from the CEO role to become Executive Chairman. While Millett's departure is also disclosed, the Board's affirmative action centers on appointing Wagler to the top executive role and promoting other senior officers (Poinsatte, Schneider, Alvarez, Anderson, Graham), making this fundamentally an appointment event rather than a departure event.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-05T02:20:31.240145+00:00","company_name":"","ticker":null,"filing_date":""},{"id":24167,"accession_number":"0001104659-26-090129","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"reasoning":"The filing discloses the appointment of Theresa E. Wagler as President and Chief Executive Officer effective January 1, 2027, following Mark D. Millett's retirement as CEO and transition to Executive Chairman. While the filing also involves Millett's departure from the CEO role, the principal disclosed action centers on Wagler's appointment to the top executive position, supported by the board's unanimous approval and detailed background on her 28-year tenure and qualifications. The filing also announces related senior leadership appointments (Poinsatte as CFO, Schneider, Alvarez, Anderson, and Graham in expanded COO roles), all effective in 2026-2027, reflecting a comprehensive succession plan.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-05T02:20:31.240145+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":24166,"accession_number":"0001104659-26-090129","item_number":"5.02","item_title":"Departure of Directors or Certain","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"reasoning":"The filing discloses multiple executive appointments effective January 1, 2027 and September 1, 2026, with the principal event being Theresa E. Wagler's appointment as President and Chief Executive Officer, succeeding Mark D. Millett who is retiring from the CEO role to become Executive Chairman. While Millett's departure is also disclosed, the Board's affirmative action centers on appointing Wagler to the top executive role and promoting other senior officers (Poinsatte, Schneider, Alvarez, Anderson, Graham), making this fundamentally an appointment event rather than a departure event.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-05T02:20:31.240145+00:00","company_name":"STEEL DYNAMICS INC","ticker":"STLD","filing_date":"2026-08-04"},{"id":24167,"accession_number":"0001104659-26-090129","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"reasoning":"The filing discloses the appointment of Theresa E. Wagler as President and Chief Executive Officer effective January 1, 2027, following Mark D. Millett's retirement as CEO and transition to Executive Chairman. While the filing also involves Millett's departure from the CEO role, the principal disclosed action centers on Wagler's appointment to the top executive position, supported by the board's unanimous approval and detailed background on her 28-year tenure and qualifications. The filing also announces related senior leadership appointments (Poinsatte as CFO, Schneider, Alvarez, Anderson, and Graham in expanded COO roles), all effective in 2026-2027, reflecting a comprehensive succession plan.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-05T02:20:31.240145+00:00","company_name":"STEEL DYNAMICS INC","ticker":"STLD","filing_date":"2026-08-04"}]}