{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-23-101144","form_type":"8-K","ticker":"STLD","cik":"0001022671","company_name":"STEEL DYNAMICS INC","filed_at":"2023-09-15T23:59:59+00:00","discovered_at":"2026-05-14T18:03:32.909763+00:00","generated_at":"2026-06-10T15:51:09.946636+00:00","sec_items":["5.02","8.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.45,"calibrated_materiality_score":0.45,"confidence":"high","headline":"Steel Dynamics appoints Jennifer Hamann, Union Pacific CFO, as independent director","bullets":["Appointed Jennifer L. Hamann (age 56) as independent director for term ending May 2024; will serve on Audit Committee.","Hamann has been EVP & CFO of Union Pacific since 2020; over 30 years at Union Pacific.","Steel Dynamics sells rail to Union Pacific (~$19M in 2022) and buys transportation (~$42M) – less than 0.5% of each company's revenues.","Appointment is for balance of one-year term; compensation per standard non-employee director arrangements."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-23-101144","json":"https://secwatch.observer/filing/0001104659-23-101144.json","markdown":"https://secwatch.observer/filing/0001104659-23-101144.md","text":"https://secwatch.observer/filing/0001104659-23-101144.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1022671/000110465923101144/0001104659-23-101144-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1022671/000110465923101144/tm2326234d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-10T15:51:09.946636+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":"3aea7d3a7b","claim":"Jennifer L. Hamann was appointed as independent director at STEEL DYNAMICS INC.","evidence_excerpt":"On September 15, 2023, the Board of Directors of Steel Dynamics, Inc. (the “Company”) appointed Jennifer L. Hamann, age 56, as a new independent director, with a term ending May 2024 coinciding with the Company’s regularly held Annual Meeting of Stockholders.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1022671/000110465923101144/0001104659-23-101144-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"independent director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}